{"pageNumber":"1013","pageRowStart":"25300","pageSize":"25","recordCount":40827,"records":[{"id":70028079,"text":"70028079 - 2006 - Confirmation of a meteoritic component in impact-melt rocks of the Chesapeake Bay impact structure, Virginia, USA - Evidence from osmium isotopic and PGE systematics","interactions":[],"lastModifiedDate":"2012-03-12T17:20:43","indexId":"70028079","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2715,"text":"Meteoritics and Planetary Science","active":true,"publicationSubtype":{"id":10}},"title":"Confirmation of a meteoritic component in impact-melt rocks of the Chesapeake Bay impact structure, Virginia, USA - Evidence from osmium isotopic and PGE systematics","docAbstract":"The osmium isotope ratios and platinum-group element (PGE) concentrations of impact-melt rocks in the Chesapeake Bay impact structure were determined. The impact-melt rocks come from the cored part of a lower-crater section of suevitic crystalline-clast breccia in an 823 m scientific test hole over the central uplift at Cape Charles, Virginia. The 187Os/188Os ratios of impact-melt rocks range from 0.151 to 0.518. The rhenium and platinum-group element (PGE) concentrations of these rocks are 30-270?? higher than concentrations in basement gneiss, and together with the osmium isotopes indicate a substantial meteoritic component in some impact-melt rocks. Because the PGE abundances in the impact-melt rocks are dominated by the target materials, interelemental ratios of the impact-melt rocks are highly variable and nonchondritic. The chemical nature of the projectile for the Chesapeake Bay impact structure cannot be constrained at this time. Model mixing calculations between chondritic and crustal components suggest that most impact-melt rocks include a bulk meteoritic component of 0.01-0.1% by mass. Several impact-melt rocks with lowest initial 187Os/188Os ratios and the highest osmium concentrations could have been produced by additions of 0.1%-0.2% of a meteoritic component. In these samples, as much as 70% of the total Os may be of meteoritic origin. At the calculated proportions of a meteoritic component (0.01-0.1% by mass), no mixtures of the investigated target rocks and sediments can reproduce the observed PGE abundances of the impact-melt rocks, suggesting that other PGE enrichment processes operated along with the meteoritic contamination. Possible explanations are 1) participation of unsampled target materials with high PGE abundances in the impact-melt rocks, and 2) variable fractionations of PGE during syn- to post-impact events. ?? The Meteoritical Society, 2006.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Meteoritics and Planetary Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"10869379","usgsCitation":"Lee, S., Horton, J.W., and Walker, R., 2006, Confirmation of a meteoritic component in impact-melt rocks of the Chesapeake Bay impact structure, Virginia, USA - Evidence from osmium isotopic and PGE systematics: Meteoritics and Planetary Science, v. 41, no. 6, p. 819-833.","startPage":"819","endPage":"833","numberOfPages":"15","costCenters":[],"links":[{"id":236838,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"41","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f9c3e4b0c8380cd4d77e","contributors":{"authors":[{"text":"Lee, S.R.","contributorId":53148,"corporation":false,"usgs":true,"family":"Lee","given":"S.R.","email":"","affiliations":[],"preferred":false,"id":416434,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Horton, J. Wright Jr. 0000-0001-6756-6365 whorton@usgs.gov","orcid":"https://orcid.org/0000-0001-6756-6365","contributorId":81184,"corporation":false,"usgs":true,"family":"Horton","given":"J.","suffix":"Jr.","email":"whorton@usgs.gov","middleInitial":"Wright","affiliations":[],"preferred":false,"id":416435,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Walker, R.J.","contributorId":105859,"corporation":false,"usgs":true,"family":"Walker","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":416436,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":79482,"text":"ofr20061267 - 2006 - 2005 annual progress report: Elk and bison grazing ecology in the Great Sand Dunes complex of lands","interactions":[],"lastModifiedDate":"2016-04-25T14:15:45","indexId":"ofr20061267","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2006-1267","title":"2005 annual progress report: Elk and bison grazing ecology in the Great Sand Dunes complex of lands","docAbstract":"<p>In 2000 the U.S. Congress authorized the expansion of the former Great Sand Dunes National Monument by establishing a new Great Sand Dunes National Park and Preserve in its place, and establishing the Baca National Wildlife Refuge. The establishment of Great Sand Dunes National Park and Preserve and the new Baca National Wildlife Refuge in the San Luis Valley (SLV), Colorado was one of the most significant land conservation actions in the western U.S. in recent years. The action was a result of cooperation between the National Park Service (NPS), U.S. Fish and Wildlife Service (USFWS), Bureau of Land Management (BLM), U.S. Forest Service (USDA-FS), and The Nature Conservancy (TNC). The new national park, when fully implemented, will consist of 107,265 acres, the new national preserve 41,872 acres, and the new national wildlife refuge (USFWS lands) 92,180 acres (fig. 1). The area encompassed by this designation protects a number of natural wonders and features including a unique ecosystem of natural sand dunes, the entire watershed of surface and groundwaters that are necessary to preserve and recharge the dunes and adjacent wetlands, a unique stunted forest, and other valuable riparian vegetation communities that support a host of associated wildlife and bird species.</p>\n<p>When the National Park was initially established, there were concerns about overconcentrations and impacts on native plant communities of the unhunted segments of a large and possibly growing elk (Cervus elaphus) population. This led to the designation of the Preserve as a compromise solution, where the elk could be harvested. The Preserve Unit, however, will not address all the ungulate management challenges. In order to reduce the current elk population, harvests of elk may need to be aggressive. But aggressive special hunts of elk to achieve population reductions can result in elk avoidance of certain areas or elk seeking refuge in areas where they cannot be hunted, while removals of whole herd segments and abandonment or alterations of migration routes can occur (Smith and Robbins, 1994; Boyce and others, 1991). Elk may seek refuge from hunting in the newly expanded Park Unit and TNC lands where they might overconcentrate and impact unique vegetation communities. In these sites of refugia, or preferred loafing sites, elk and bison could accelerate a decline in woody riparian shrubs and trees. This decline may also be due to changes in hydrology, climatic, or dunal processes, but ungulate herbivory might exacerbate the effects of those processes.</p>\n<p>To address the questions and needs of local resource managers, a multi-agency research project was initiated in 2005 to study the ecology, forage relations, and habitat relations of elk and bison in the Great Sand Dunes&ndash;Sangre de Cristo&ndash;Baca complex of lands. Meetings and discussions of what this research should include were started in 2001 with representatives from NPS, USFWS, TNC, the Colorado Division of Wildlife (CDOW), and USDA-FS/BLM. The final study plan was successfully funded in 2004 with research scheduled to start in 2005. The research was designed to encompass three major study elements: (1) animal movements and population dynamics, (2) vegetation and nutrient effects from ungulate herbivory, and (3) development of ecological models, using empirical data collected from the first two components, that will include estimates of elk carrying capacity and management scenarios for resource managers.</p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20061267","usgsCitation":"Schoenecker, K.A., Lubow, B., Zeigenfuss, L., and Mao, J., 2006, 2005 annual progress report: Elk and bison grazing ecology in the Great Sand Dunes complex of lands: U.S. Geological Survey Open-File Report 2006-1267, viii, 45 p., https://doi.org/10.3133/ofr20061267.","productDescription":"viii, 45 p.","numberOfPages":"53","onlineOnly":"Y","additionalOnlineFiles":"N","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":190612,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20061267.PNG"},{"id":320220,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2006/1267/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Colorado","otherGeospatial":"Baca National Wildlife Refuge, Great Sand Dunes National Park and Preserve, San Luis Valley","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -105.86975097656249,\n              37.54893261064109\n            ],\n            [\n              -105.86975097656249,\n              37.913867495923746\n            ],\n            [\n              -105.49072265625,\n              37.913867495923746\n            ],\n            [\n              -105.49072265625,\n              37.54893261064109\n            ],\n            [\n              -105.86975097656249,\n              37.54893261064109\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd491fe4b0b290850eee8b","contributors":{"authors":[{"text":"Schoenecker, Kate A.","contributorId":64343,"corporation":false,"usgs":true,"family":"Schoenecker","given":"Kate","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":290017,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lubow, Bruce C.","contributorId":59520,"corporation":false,"usgs":true,"family":"Lubow","given":"Bruce C.","affiliations":[],"preferred":false,"id":290016,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zeigenfuss, Linda 0000-0002-6700-8563 linda_zeigenfuss@usgs.gov","orcid":"https://orcid.org/0000-0002-6700-8563","contributorId":2079,"corporation":false,"usgs":true,"family":"Zeigenfuss","given":"Linda","email":"linda_zeigenfuss@usgs.gov","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":290015,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Mao, Julie","contributorId":74460,"corporation":false,"usgs":true,"family":"Mao","given":"Julie","email":"","affiliations":[],"preferred":false,"id":290018,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":79589,"text":"ofr20061318 - 2006 - Deschutes Estuary feasibility study: Hydrodynamics and sediment transport modeling","interactions":[],"lastModifiedDate":"2023-09-01T21:35:25.751519","indexId":"ofr20061318","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2006-1318","title":"Deschutes Estuary feasibility study: Hydrodynamics and sediment transport modeling","docAbstract":"<p>Continual sediment accumulation in Capitol Lake since the damming of the Deschutes River in 1951 has altered the initial morphology of the basin. As part of the Deschutes River Estuary Feasibility Study (DEFS), the United States Geological Survey (USGS) was tasked to model how tidal and storm processes will influence the river, lake and lower Budd Inlet should estuary restoration occur. Understanding these mechanisms will assist in developing a scientifically sound assessment on the feasibility of restoring the estuary.</p>\n<br>\n<p>The goals of the DEFS are as follows.</p>\n<br>\n<p>- Increase understanding of the estuary alternative to the same level as managing the lake environment.</p>\n<p>- Determine the potential to create a viable, self sustaining estuary at Capitol Lake, given all the existing physical constraints and the urban setting.</p>\n<p>- Create a net-benefit matrix which will allow a fair evaluation of overall benefits and costs of various alternative scenarios.</p>\n<p>- Provide the completed study to the CLAMP Steering Committee so that a recommendation about a long-term aquatic environment of the basin can be made.</p>\n<br>\n<p>The hydrodynamic and sediment transport modeling task developed a number of different model simulations using a process-based morphological model, Delft3D, to help address these goals. Modeling results provide a qualitative assessment of estuarine behavior both prior to dam construction and after various post-dam removal scenarios. Quantitative data from the model is used in the companion biological assessment and engineering design components of the overall study.</p>\n<br>\n<p>Overall, the modeling study found that after dam removal, tidal and estuarine processes are immediately restored, with marine water from Budd Inlet carried into North and Middle Basin on each rising tide and mud flats being exposed with each falling tide. Within the first year after dam removal, tidal processes, along with the occasional river floods, act to modify the estuary bed by redistributing sediment through erosion and deposition. The morphological response of the bed is rapid during the first couple of years, then slows as a dynamic equilibrium is reached within three to five years. By ten years after dam removal, the overall hydrodynamic and morphologic behavior of the estuary is similar to the pre-dam estuary, with the exception of South Basin, which has been permanently modified by human activities.</p>\n<br>\n<p>In addition to a qualitative assessment of estuarine behavior, process-based modeling provides the ability address specific questions to help to inform decision-making. Considering that predicting future conditions of a complex estuarine environment is wrought with uncertainties, quantitative results in this report are often expressed in terms of ranges of possible outcomes.</p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20061318","usgsCitation":"George, D.A., Gelfenbaum, G., Lesser, G., and Stevens, A., 2006, Deschutes Estuary feasibility study: Hydrodynamics and sediment transport modeling (Version 1.0): U.S. Geological Survey Open-File Report 2006-1318, Report: 222 p.; 2 Appendixes: 177 p.; Metadata, https://doi.org/10.3133/ofr20061318.","productDescription":"Report: 222 p.; 2 Appendixes: 177 p.; Metadata","temporalStart":"2005-02-16","temporalEnd":"2005-02-17","costCenters":[{"id":645,"text":"Western Coastal and Marine Geology","active":false,"usgs":true}],"links":[{"id":420428,"rank":6,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_80585.htm","linkFileType":{"id":5,"text":"html"}},{"id":9208,"rank":5,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2006/1318/","linkFileType":{"id":5,"text":"html"}},{"id":192369,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":295746,"rank":4,"type":{"id":16,"text":"Metadata"},"url":"https://pubs.usgs.gov/of/2006/1318/CapitolLakeSeds.html","linkFileType":{"id":5,"text":"html"}},{"id":295744,"rank":3,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2006/1318/of2006-1318.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":295745,"rank":2,"type":{"id":3,"text":"Appendix"},"url":"https://pubs.usgs.gov/of/2006/1318/of2006-1318_appendixes.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Washington","otherGeospatial":"Deschutes Estuary","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -122.9133,\n              47.0619\n            ],\n            [\n              -122.9133,\n              47.0183\n            ],\n            [\n              -122.8914,\n              47.0183\n            ],\n            [\n              -122.8914,\n              47.0619\n            ],\n            [\n              -122.9133,\n              47.0619\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ab0e4b07f02db66dd64","contributors":{"authors":[{"text":"George, Douglas A.","contributorId":60328,"corporation":false,"usgs":true,"family":"George","given":"Douglas","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":290306,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gelfenbaum, Guy","contributorId":79844,"corporation":false,"usgs":true,"family":"Gelfenbaum","given":"Guy","affiliations":[],"preferred":false,"id":290307,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lesser, Giles","contributorId":88216,"corporation":false,"usgs":true,"family":"Lesser","given":"Giles","email":"","affiliations":[],"preferred":false,"id":290308,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Stevens, Andrew W.","contributorId":89093,"corporation":false,"usgs":true,"family":"Stevens","given":"Andrew W.","affiliations":[],"preferred":false,"id":290309,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":1015125,"text":"1015125 - 2006 - Transverse and longitudinal variation in woody riparian vegetation along a montane river","interactions":[],"lastModifiedDate":"2017-08-29T21:40:20","indexId":"1015125","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3746,"text":"Western North American Naturalist","onlineIssn":"1944-8341","printIssn":"1527-0904","active":true,"publicationSubtype":{"id":10}},"title":"Transverse and longitudinal variation in woody riparian vegetation along a montane river","docAbstract":"<p>This study explores how the relationship between flow and riparian vegetation varies along a montane river. We mapped occurrence of woody riparian plant communities along 58 km of the San Miguel River in southwestern Colorado. We determined the recurrence interval of inundation for each plant community by combining step-backwater hydraulic modeling at 4 representative reaches with Log-Pearson analysis of 4 stream gaging stations. Finally, we mapped bottomland surficial geology and used a Geographic Information System to overlay the coverages of geology and vegetation. Plant communities were distinctly arrayed along the hydrologic gradient. The <i>Salix exigua</i> Nuttall (sand-bar willow) community occurred mostly on surfaces with a recurrence interval of inundation shorter than 2.2 years; the <i>Betula occidentalis</i> Hooker (river birch) community peaked on sites with recurrence intervals of inundation between 2.2 and 4.6 years. The hydrologic position occupied by communities dominated by <i>Populus angustifolia</i> James (narrowleaf cottonwood) was strongly related to age of trees and species composition of understory shrubs. The fraction of riparian vegetation on surfaces historically inundated by the river decreased in the upstream direction from almost 100% near Uravan to &lt;50% along the South Fork of the San Miguel River. In upstream reaches much of the physical disturbance necessary to maintain riparian vegetation is provided by valley-side processes including debris flows, floods from minor tributaries, landslides, and beaver activity. Where valley-side processes are important, prediction of riparian vegetation change based on alterations of river flow will be incomplete.</p>","language":"English","publisher":"Brigham Young University","doi":"10.3398/1527-0904(2006)66[78:TALVIW]2.0.CO;2","usgsCitation":"Friedman, J.M., Auble, G., Andrews, E., Kittel, G., Madole, R., Griffin, E., and Allred, T.M., 2006, Transverse and longitudinal variation in woody riparian vegetation along a montane river: Western North American Naturalist, v. 66, no. 1, p. 78-91, https://doi.org/10.3398/1527-0904(2006)66[78:TALVIW]2.0.CO;2.","productDescription":"p. 78-91","startPage":"78","endPage":"91","numberOfPages":"14","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":488724,"rank":1,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://scholarsarchive.byu.edu/wnan/vol66/iss1/7","text":"External Repository"},{"id":130095,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"66","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a4de4b07f02db626cb1","contributors":{"authors":[{"text":"Friedman, Jonathan M. 0000-0002-1329-0663","orcid":"https://orcid.org/0000-0002-1329-0663","contributorId":44495,"corporation":false,"usgs":true,"family":"Friedman","given":"Jonathan","middleInitial":"M.","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":322248,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Auble, G.T.","contributorId":19505,"corporation":false,"usgs":true,"family":"Auble","given":"G.T.","email":"","affiliations":[],"preferred":false,"id":322245,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Andrews, E.D.","contributorId":13922,"corporation":false,"usgs":true,"family":"Andrews","given":"E.D.","email":"","affiliations":[],"preferred":false,"id":322243,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kittel, G.","contributorId":36082,"corporation":false,"usgs":true,"family":"Kittel","given":"G.","email":"","affiliations":[],"preferred":false,"id":322247,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Madole, R.F. 0000-0002-9081-570X","orcid":"https://orcid.org/0000-0002-9081-570X","contributorId":34086,"corporation":false,"usgs":true,"family":"Madole","given":"R.F.","affiliations":[],"preferred":false,"id":322246,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Griffin, E.R.","contributorId":15143,"corporation":false,"usgs":true,"family":"Griffin","given":"E.R.","email":"","affiliations":[],"preferred":false,"id":322244,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Allred, Tyler M.","contributorId":173170,"corporation":false,"usgs":false,"family":"Allred","given":"Tyler","email":"","middleInitial":"M.","affiliations":[{"id":27172,"text":"Allred Restoration, Inc., Tremonton, UT","active":true,"usgs":false}],"preferred":false,"id":322249,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70028037,"text":"70028037 - 2006 - Groundwater-surface water interaction in the riparian zone of an incised channel, Walnut Creek, Iowa","interactions":[],"lastModifiedDate":"2012-03-12T17:20:55","indexId":"70028037","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Groundwater-surface water interaction in the riparian zone of an incised channel, Walnut Creek, Iowa","docAbstract":"Riparian zones of many incised channels in agricultural regions are cropped to the channel edge leaving them unvegetated for large portions of the year. In this study we evaluated surface and groundwater interaction in the riparian zone of an incised stream during a spring high flow period using detailed stream stage and hydraulic head data from six wells, and water quality sampling to determine whether the riparian zone can be a source of nitrate pollution to streams. Study results indicated that bank storage of stream water from Walnut Creek during a large storm water runoff event was limited to a narrow 1.6 m zone immediately adjacent to the channel. Nitrate concentrations in riparian groundwater were highest near the incised stream where the unsaturated zone was thickest. Nitrate and dissolved oxygen concentrations and nitrate-chloride ratios increased during a spring recharge period then decreased in the latter portion of the study. We used MODFLOW and MT3DMS to evaluate dilution and denitrification processes that would contribute to decreasing nitrate concentrations in riparian groundwater over time. MT3DMS model simulations were improved with a denitrification rate of 0.02 1/d assigned to the floodplain sediments implying that denitrification plays an important role in reducing nitrate concentrations in groundwater. We conclude that riparian zones of incised channels can potentially be a source of nitrate to streams during spring recharge periods when the near-stream riparian zone is largely unvegetated. ?? 2005 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jhydrol.2005.11.014","issn":"00221694","usgsCitation":"Schilling, K.E., Li, Z., and Zhang, Y., 2006, Groundwater-surface water interaction in the riparian zone of an incised channel, Walnut Creek, Iowa: Journal of Hydrology, v. 327, no. 1-2, p. 140-150, https://doi.org/10.1016/j.jhydrol.2005.11.014.","startPage":"140","endPage":"150","numberOfPages":"11","costCenters":[],"links":[{"id":237292,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":210389,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jhydrol.2005.11.014"}],"volume":"327","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a2dd1e4b0c8380cd5c057","contributors":{"authors":[{"text":"Schilling, K. E.","contributorId":61982,"corporation":false,"usgs":true,"family":"Schilling","given":"K.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":416242,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Li, Z.","contributorId":29160,"corporation":false,"usgs":true,"family":"Li","given":"Z.","affiliations":[],"preferred":false,"id":416240,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zhang, Y.-K.","contributorId":44309,"corporation":false,"usgs":true,"family":"Zhang","given":"Y.-K.","email":"","affiliations":[],"preferred":false,"id":416241,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70028066,"text":"70028066 - 2006 - Niche evolution and adaptive radiation: Testing the order of trait divergence","interactions":[],"lastModifiedDate":"2012-03-12T17:20:51","indexId":"70028066","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1465,"text":"Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Niche evolution and adaptive radiation: Testing the order of trait divergence","docAbstract":"In the course of an adaptive radiation, the evolution of niche parameters is of particular interest for understanding modes of speciation and the consequences for coexistence of related species within communities. We pose a general question: In the course of an evolutionary radiation, do traits related to within-community niche differences (?? niche) evolve before or after differentiation of macrohabitat affinity or climatic tolerances (?? niche)? Here we introduce a new test to address this question, based on a modification of the method of independent contrasts. The divergence order test (DOT) is based on the average age of the nodes on a tree, weighted by the absolute magnitude of the contrast at each node for a particular trait. The comparison of these weighted averages reveals whether large divergences for one trait have occurred earlier or later in the course of diversification, relative to a second trait; significance is determined by bootstrapping from maximum-likelihood ancestral state reconstructions. The method is applied to the evolution of Ceanothus, a woody plant group in California, in which co-occurring species exhibit significant differences in a key leaf trait (specific leaf area) associated with contrasting physiological and life history strategies. Co-occurring species differ more for this trait than expected under a null model of community assembly. This ?? niche difference evolved early in the divergence of two major subclades within Ceanothus, whereas climatic distributions (?? niche traits) diversified later within each of the subclades. However, rapid evolution of climate parameters makes inferences of early divergence events highly uncertain, and differentiation of the ?? niche might have taken place throughout the evolution of the group, without leaving a clear phylogenetic signal. Similar patterns observed in several plant and animal groups suggest that early divergence of ?? niche traits might be a common feature of niche evolution in many adaptive radiations. ?? 2006 by the Ecological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00129658","usgsCitation":"Ackerly, D., Schwilk, D., and Webb, C., 2006, Niche evolution and adaptive radiation: Testing the order of trait divergence: Ecology, v. 87, no. 7 SUPPL.","costCenters":[],"links":[{"id":237189,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"87","issue":"7 SUPPL.","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6637e4b0c8380cd72d55","contributors":{"authors":[{"text":"Ackerly, D. D.","contributorId":94077,"corporation":false,"usgs":false,"family":"Ackerly","given":"D. D.","affiliations":[],"preferred":false,"id":416392,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schwilk, D.W.","contributorId":29770,"corporation":false,"usgs":true,"family":"Schwilk","given":"D.W.","affiliations":[],"preferred":false,"id":416390,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Webb, C.O.","contributorId":57255,"corporation":false,"usgs":true,"family":"Webb","given":"C.O.","email":"","affiliations":[],"preferred":false,"id":416391,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70028286,"text":"70028286 - 2006 - Mussel dynamics model: A hydroinformatics tool for analyzing the effects of different stressors on the dynamics of freshwater mussel communities","interactions":[],"lastModifiedDate":"2012-03-12T17:20:44","indexId":"70028286","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1458,"text":"Ecological Modelling","active":true,"publicationSubtype":{"id":10}},"title":"Mussel dynamics model: A hydroinformatics tool for analyzing the effects of different stressors on the dynamics of freshwater mussel communities","docAbstract":"A model for simulating freshwater mussel population dynamics is presented. The model is a hydroinformatics tool that integrates principles from ecology, river hydraulics, fluid mechanics and sediment transport, and applies the individual-based modelling approach for simulating population dynamics. The general model layout, data requirements, and steps of the simulation process are discussed. As an illustration, simulation results from an application in a 10 km reach of the Upper Mississippi River are presented. The model was used to investigate the spatial distribution of mussels and the effects of food competition in native unionid mussel communities, and communities infested by Dreissena polymorpha, the zebra mussel. Simulation results were found to be realistic and coincided with data obtained from the literature. These results indicate that the model can be a useful tool for assessing the potential effects of different stressors on long-term population dynamics, and consequently, may improve the current understanding of cause and effect relationships in freshwater mussel communities. ?? 2006 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecological Modelling","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.ecolmodel.2006.03.018","issn":"03043800","usgsCitation":"Morales, Y., Weber, L., Mynett, A., and Newton, T., 2006, Mussel dynamics model: A hydroinformatics tool for analyzing the effects of different stressors on the dynamics of freshwater mussel communities: Ecological Modelling, v. 197, no. 3-4, p. 448-460, https://doi.org/10.1016/j.ecolmodel.2006.03.018.","startPage":"448","endPage":"460","numberOfPages":"13","costCenters":[],"links":[{"id":210102,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.ecolmodel.2006.03.018"},{"id":236921,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"197","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a60dfe4b0c8380cd71713","contributors":{"authors":[{"text":"Morales, Y.","contributorId":47961,"corporation":false,"usgs":true,"family":"Morales","given":"Y.","email":"","affiliations":[],"preferred":false,"id":417398,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Weber, L.J.","contributorId":79988,"corporation":false,"usgs":true,"family":"Weber","given":"L.J.","email":"","affiliations":[],"preferred":false,"id":417399,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mynett, A.E.","contributorId":31188,"corporation":false,"usgs":true,"family":"Mynett","given":"A.E.","email":"","affiliations":[],"preferred":false,"id":417397,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Newton, T.J.","contributorId":104428,"corporation":false,"usgs":true,"family":"Newton","given":"T.J.","email":"","affiliations":[],"preferred":false,"id":417400,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70028159,"text":"70028159 - 2006 - Modeling the transport and inactivation of E. coli and enterococci in the near-shore region of Lake Michigan","interactions":[],"lastModifiedDate":"2016-05-06T11:56:12","indexId":"70028159","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Modeling the transport and inactivation of E. coli and enterococci in the near-shore region of Lake Michigan","docAbstract":"<p><span>To investigate the transport and fate of fecal pollution at Great Lakes beaches and the health risks associated with swimming, the near-shore waters of Lake Michigan and two tributaries discharging into it were examined for bacterial indicators of human fecal pollution. The enterococcus human fecal pollution marker, which targets a putative virulence factor</span><img class=\"privateChar\" src=\"http://pubs.acs.org/entityImage/legacy/sbd.gif\" alt=\"\" /><span>the enterococcal surface protein (esp) in&nbsp;</span><i>Enterococcus faecium</i><span>, was detected in 2/28 samples (7%) in the tributaries draining into Lake Michigan and in 6/30 samples (20%) in Lake Michigan beaches. This was indicative of human fecal pollution being transported in the tributaries and occurrence at Lake Michigan beaches. To understand the relative importance of different processes influencing pollution transport and inactivation, a finite-element model of surf-zone hydrodynamics (coupled with models for temperature,&nbsp;</span><i>E. coli</i><span>&nbsp;and enterococci) was used. Enterococci appear to survive longer than&nbsp;</span><i>E. coli</i><span>, which was described using an overall first-order inactivation coefficient in the range 0.5&minus;2.0 per day. Our analysis suggests that the majority of fecal indicator bacteria variation can be explained based on loadings from the tributaries. Sunlight is a major contributor to inactivation in the surf-zone and the formulation based on sunlight, temperature and sedimentation is preferred over the first-order inactivation formulation.</span></p>","language":"English","publisher":"ACS Publications","doi":"10.1021/es060438k","issn":"0013936X","usgsCitation":"Liu, L., Phanikumar, M., Molloy, S., Whitman, R., Shively, D., Nevers, M., Schwab, D., and Rose, J., 2006, Modeling the transport and inactivation of E. coli and enterococci in the near-shore region of Lake Michigan: Environmental Science & Technology, v. 40, no. 16, p. 5022-5028, https://doi.org/10.1021/es060438k.","productDescription":"7 p.","startPage":"5022","endPage":"5028","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":237127,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":210258,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1021/es060438k"}],"volume":"40","issue":"16","noUsgsAuthors":false,"publicationDate":"2006-07-14","publicationStatus":"PW","scienceBaseUri":"505a5c54e4b0c8380cd6fbe1","contributors":{"authors":[{"text":"Liu, L.","contributorId":18481,"corporation":false,"usgs":true,"family":"Liu","given":"L.","email":"","affiliations":[],"preferred":false,"id":416833,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Phanikumar, M.S.","contributorId":83328,"corporation":false,"usgs":true,"family":"Phanikumar","given":"M.S.","affiliations":[],"preferred":false,"id":416839,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Molloy, S.L.","contributorId":51527,"corporation":false,"usgs":true,"family":"Molloy","given":"S.L.","email":"","affiliations":[],"preferred":false,"id":416835,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Whitman, R.L.","contributorId":69750,"corporation":false,"usgs":true,"family":"Whitman","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":416837,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Shively, D.A.","contributorId":78123,"corporation":false,"usgs":true,"family":"Shively","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":416838,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Nevers, M.B.","contributorId":13787,"corporation":false,"usgs":true,"family":"Nevers","given":"M.B.","email":"","affiliations":[],"preferred":false,"id":416832,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Schwab, D.J.","contributorId":23730,"corporation":false,"usgs":true,"family":"Schwab","given":"D.J.","email":"","affiliations":[],"preferred":false,"id":416834,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Rose, J.B.","contributorId":60825,"corporation":false,"usgs":true,"family":"Rose","given":"J.B.","email":"","affiliations":[],"preferred":false,"id":416836,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":71066,"text":"sir20055059 - 2006 - Methods Used to Assess the Susceptibility to Contamination of Transient, Non-Community Public Ground-Water Supplies in Indiana","interactions":[],"lastModifiedDate":"2016-05-09T11:09:16","indexId":"sir20055059","displayToPublicDate":"2005-08-23T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":334,"text":"Scientific Investigations Report","code":"SIR","onlineIssn":"2328-0328","printIssn":"2328-031X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2005-5059","title":"Methods Used to Assess the Susceptibility to Contamination of Transient, Non-Community Public Ground-Water Supplies in Indiana","docAbstract":"<p>The Safe Water Drinking Act of 1974 as amended in 1996 gave each State the responsibility of developing a Source-Water Assessment Plan (SWAP) that is designed to protect public-water supplies from contamination. Each SWAP must include three elements: (1) a delineation of the source-water protection area, (2) an inventory of potential sources of contaminants within the area, and (3) a determination of the susceptibility of the public-water supply to contamination from the inventoried sources. The Indiana Department of Environmental Management (IDEM) was responsible for preparing a SWAP for all public-water supplies in Indiana, including about 2,400 small public ground-water supplies that are designated transient, non-community (TNC) supplies. In cooperation with IDEM, the U.S. Geological Survey compiled information on conditions near the TNC supplies and helped IDEM complete source-water assessments for each TNC supply. The delineation of a source-water protection area (called the assessment area) for each TNC ground-water supply was defined by IDEM as a circular area enclosed by a 300-foot radius centered at the TNC supply well. Contaminants of concern (COCs) were defined by IDEM as any of the 90 contaminants for which the U.S. Environmental Protection Agency has established primary drinking-water standards. Two of these, nitrate as nitrogen and total coliform bacteria, are Indiana State-regulated contaminants for TNC water supplies. IDEM representatives identified potential point and nonpoint sources of COCs within the assessment area, and computer database retrievals were used to identify potential point sources of COCs in the area outside the assessment area. Two types of methods-subjective and subjective hybrid-were used in the SWAP to determine susceptibility to contamination. Subjective methods involve decisions based upon professional judgment, prior experience, and (or) the application of a fundamental understanding of processes without the collection and analysis of data for a specific condition. Subjective hybrid methods combine subjective methods with quantitative hydrologic analyses. The subjective methods included an inventory of potential sources and associated contaminants, and a qualitative description of the inherent susceptibility of the area around the TNC supply. The description relies on a classification of the hydrogeologic and geomorphic characteristics of the general area around the TNC supply in terms of its surficial geology, regional aquifer system, the occurrence of fine- and coarse-grained geologic materials above the screen of the TNC well, and the potential for infiltration of contaminants. The subjective hybrid method combined the results of a logistic regression analysis with a subjective analysis of susceptibility and a subjective set of definitions that classify the thickness of fine-grained geologic materials above the screen of a TNC well in terms of impedance to vertical flow. The logistic regression determined the probability of elevated concentrations of nitrate as nitrogen (greater than or equal to 3 milligrams per liter) in ground water associated with specific thicknesses of fine-grained geologic materials above the screen of a TNC well. In this report, fine-grained geologic materials are referred to as a geologic barrier that generally impedes vertical flow through an aquifer. A geologic barrier was defined to be thin for fine-grained materials between 0 and 45 feet thick, moderate for materials between 45 and 75 feet thick, and thick if the fine-grained materials were greater than 75 feet thick. A flow chart was used to determine the susceptibility rating for each TNC supply. The flow chart indicated a susceptibility rating using (1) concentrations of nitrate as nitrogen and total coliform bacteria reported from routine compliance monitoring of the TNC supply, (2) the presence or absence of potential sources of regulated contaminants (nitrate as nitrogen and coliform bac</p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/sir20055059","collaboration":"Prepared in cooperation with the Indiana Department of Environmental Management","usgsCitation":"Arihood, L.D., and Cohen, D.A., 2006, Methods Used to Assess the Susceptibility to Contamination of Transient, Non-Community Public Ground-Water Supplies in Indiana: U.S. Geological Survey Scientific Investigations Report 2005-5059, vi, 40 p., https://doi.org/10.3133/sir20055059.","productDescription":"vi, 40 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,{"id":70206631,"text":"ofr20051066 - 2006 - Project PROBE Leg I - Report and archive of multibeam bathymetry and acoustic backscatter , CTD/XBT and GPS navigation data collected during USGS Cruise 02051 (NOAA Cruise RB0208) Puerto Rico Trench September 24, 2002 to September 30, 2002","interactions":[],"lastModifiedDate":"2024-05-09T20:13:39.083002","indexId":"ofr20051066","displayToPublicDate":"2005-01-01T09:28:39","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2005-1066","title":"Project PROBE Leg I - Report and archive of multibeam bathymetry and acoustic backscatter , CTD/XBT and GPS navigation data collected during USGS Cruise 02051 (NOAA Cruise RB0208) Puerto Rico Trench September 24, 2002 to September 30, 2002","docAbstract":"<p>On September 24-30, 2002, six days of scientific surveying to map a section of the Puerto Rico Trench (PRT) took place aboard the National Oceanic and Atmospheric Administration (NOAA) ship Ron Brown. The cruise was funded by NOAA's Office of Ocean Exploration. Multibeam bathymetry and acoustic-backscatter data were collected over an area of about 25,000 sq. km of the Puerto Rico trench and its vicinity at water depths of 4000-8400 m. Weather conditions during the entire survey were good; there were light to moderate winds and 1-2 foot swells experiencing minor chop. The roll and pitch of the ship's interaction with the ocean were not conspicuous. Cruise participants included personnel from USGS, NOAA, and University of New Hampshire Center for Coastal and Ocean Mapping/Joint Hydrographic Center. The cruise resulted in the discovery of a major active strike-slip fault system close to the trench, submarine slides on the descending North American tectonic plate, and an extinct mud volcano, which was cut by the strike-slip fault system. Another strike-slip fault system closer to Puerto Rico that was previously considered to accommodate much of the relative plate motion appears to be inactive. The seaward continuation of the Mona Rift, a zone of extension between Puerto Rico and the Dominican Republic that generated a devastating tsunami in 1918, was mapped for the first time.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr20051066","usgsCitation":"ten Brink, U., Worley, C.R., Smith, S., Stepka, T., and Williams, G.F., 2006, Project PROBE Leg I - Report and archive of multibeam bathymetry and acoustic backscatter , CTD/XBT and GPS navigation data collected during USGS Cruise 02051 (NOAA Cruise RB0208) Puerto Rico Trench September 24, 2002 to September 30, 2002: U.S. Geological Survey Open-File Report 2005-1066, HTML document, https://doi.org/10.3133/ofr20051066.","productDescription":"HTML document","temporalStart":"2002-09-24","temporalEnd":"2002-09-30","costCenters":[{"id":680,"text":"Woods Hole Science Center","active":false,"usgs":true}],"links":[{"id":369195,"rank":4,"type":{"id":16,"text":"Metadata"},"url":"https://pubs.usgs.gov/of/2005/1066/htmldocs/meta.htm","linkFileType":{"id":5,"text":"html"}},{"id":369194,"rank":3,"type":{"id":23,"text":"Spatial Data"},"url":"https://pubs.usgs.gov/of/2005/1066/htmldocs/cruisedata.htm","linkFileType":{"id":5,"text":"html"}},{"id":369192,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/2005/1066/coverthb.jpg"},{"id":369193,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2005/1066/index.htm","linkFileType":{"id":5,"text":"html"}}],"state":"Puerto Rico","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -67.75,\n              18.9\n            ],\n            [\n              -65.5,\n              18.9\n            ],\n            [\n              -65.5,\n              20.25\n            ],\n            [\n              -67.75,\n              20.25\n            ],\n            [\n              -67.75,\n              18.9\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","contact":"<p><a href=\"https://pubs.usgs.gov/contact\" data-mce-href=\"../contact\">Contact Pubs Warehouse</a></p>","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"ten Brink, Uri S. 0000-0001-6858-3001 utenbrink@usgs.gov","orcid":"https://orcid.org/0000-0001-6858-3001","contributorId":127560,"corporation":false,"usgs":true,"family":"ten Brink","given":"Uri S.","email":"utenbrink@usgs.gov","affiliations":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true},{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":775267,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Worley, Charles R. cworley@usgs.gov","contributorId":3063,"corporation":false,"usgs":true,"family":"Worley","given":"Charles","email":"cworley@usgs.gov","middleInitial":"R.","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":775268,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Smith, Shep","contributorId":77624,"corporation":false,"usgs":true,"family":"Smith","given":"Shep","email":"","affiliations":[],"preferred":false,"id":775269,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Stepka, Thomas","contributorId":84862,"corporation":false,"usgs":true,"family":"Stepka","given":"Thomas","email":"","affiliations":[],"preferred":false,"id":775270,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Williams, Glynn F.","contributorId":83618,"corporation":false,"usgs":true,"family":"Williams","given":"Glynn","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":775271,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":77491,"text":"i2600A - 2006 - Coastal-change and glaciological map of the Trinity Peninsula area and south Shetland Islands, Antarctica: 1843-2001: Chapter A in <i>Coastal-change and glaciological maps of Antarctica</i>","interactions":[],"lastModifiedDate":"2018-03-23T14:52:55","indexId":"i2600A","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":320,"text":"IMAP","code":"I","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"2600","chapter":"A","title":"Coastal-change and glaciological map of the Trinity Peninsula area and south Shetland Islands, Antarctica: 1843-2001: Chapter A in <i>Coastal-change and glaciological maps of Antarctica</i>","docAbstract":"<p>Changes in the area and volume of polar ice sheets are intricately linked to changes in global climate, and the resulting changes in sea level could severely impact the densely populated coastal regions on Earth. Melting of the West Antarctic part alone of the Antarctic ice sheet would cause a sea-level rise of approximately 6 meters (m). The potential sea-level rise after melting of the entire Antarctic ice sheet is estimated to be 65 m (Lythe and others, 2001) to 73 m (Williams and Hall, 1993). In addition to its importance, the mass balance (the net volumetric gain or loss) of the Antarctic ice sheet is highly complex, responding differently to different conditions in each region (Vaughan, 2005). In a review paper, Rignot and Thomas (2002) concluded that the West Antarctic ice sheet is probably becoming thinner overall; although it is thickening in the west, it is thinning in the north. Thomas and others (2004), on the basis of aircraft and satellite laser altimetry surveys, believe the thinning may be accelerating. Joughin and Tulaczyk (2002), on the basis of analysis of ice-flow velocities derived from synthetic aperture radar, concluded that most of the Ross ice streams (ice streams on the east side of the Ross Ice Shelf) have a positive mass balance, whereas Rignot and others (2004) infer even larger negative mass balance for glaciers flowing northward into the Amundsen Sea, a trend suggested by Swithinbank and others (2003a,b, 2004). The mass balance of the East Antarctic ice sheet is thought by Davis and others (2005) to be strongly positive on the basis of the change in satellite altimetry measurements made between 1992 and 2003.</p>\n<br>\n<p>Measurement of changes in area and mass balance of the Antarctic ice sheet was given a very high priority in recommendations by the Polar Research Board of the National Research Council (1986), in subsequent recommendations by the Scientific Committee on Antarctic Research (SCAR) (1989, 1993), and by the National Science Foundation's (1990) Division of Polar Programs. On the basis of these recommendations, the U.S. Geological Survey (USGS) decided that the archive of early 1970s Landsat 1, 2, and 3 Multispectral Scanner (MSS) images of Antarctica and the subsequent repeat coverage made possible with Landsat and other satellite images provided an excellent means of documenting changes in the coastline of Antarctica (Ferrigno and Gould, 1987). The availability of this information provided the impetus for carrying out a comprehensive analysis of the glaciological features of the coastal regions and changes in ice fronts of Antarctica (Swithinbank, 1988; Williams and Ferrigno, 1988). The project was later modified to include Landsat 4 and 5 MSS and Thematic Mapper (TM) [and in some areas Landsat 7 Enhanced Thematic Mapper Plus (ETM+)], RADARSAT images, and other data where available, to compare changes that occurred during a 20- to 25- or 30-year time interval (or longer where data were available, as in the Antarctic Peninsula). The results of the analysis are being used to produce a digital database and a series of USGS Geologic Investigations Series Maps (I–2600) consisting of 23 maps at 1:1,000,000 scale and 1 map at 1:5,000,000 scale, in both paper and digital format (Williams and others, 1995; Williams and Ferrigno, 1998; Ferrigno and others, 2002).</p>","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Coastal-change and glaciological maps of Antarctica","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/i2600A","isbn":"0607964421","collaboration":"This report is Chapter A in <i>Coastal-change and glaciological maps of Antarctica</i>.  For more information, see: <a href=\"http://pubs.usgs.gov/imap/2600/\">IMAP 2600</a>. Prepared in cooperation with the British Antarctic Survey, Scott Polar Research Institute, and Bundesamt für Kartographie und Geodäsie","usgsCitation":"Ferrigno, J.G., Cook, A.J., Foley, K.M., Williams, R., Swithinbank, C., Fox, A.J., Thomson, J.W., and Sievers, J., 2006, Coastal-change and glaciological map of the Trinity Peninsula area and south Shetland Islands, Antarctica: 1843-2001: Chapter A in <i>Coastal-change and glaciological maps of Antarctica</i>: U.S. Geological Survey IMAP 2600, 1 Plate: 45.00 x 28.00 inches; Pamphlet: iv, 32 p., https://doi.org/10.3133/i2600A.","productDescription":"1 Plate: 45.00 x 28.00 inches; Pamphlet: iv, 32 p.","numberOfPages":"36","temporalStart":"1842-12-31","temporalEnd":"2001-12-31","costCenters":[{"id":181,"text":"Coastal Change and Glaciological Maps of Antarctica","active":false,"usgs":true}],"links":[{"id":191198,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":9417,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/imap/2600/A/","linkFileType":{"id":5,"text":"html"}},{"id":295719,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/imap/2600/A/pdf/TrinityCoast.pdf"},{"id":295720,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/imap/2600/A/pdf/I2600-A-pamphlet.pdf"}],"scale":"1000000","projection":"Polar stereographic projection","otherGeospatial":"Antarctica, South Shetland Islands, Trinity Peninsula","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -67,-65 ], [ -67,-60 ], [ -52,-60 ], [ -52,-65 ], [ -67,-65 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b24e4b07f02db6aea19","contributors":{"authors":[{"text":"Ferrigno, Jane G. jferrign@usgs.gov","contributorId":39825,"corporation":false,"usgs":true,"family":"Ferrigno","given":"Jane","email":"jferrign@usgs.gov","middleInitial":"G.","affiliations":[{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"preferred":false,"id":288586,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cook, Alison J.","contributorId":42665,"corporation":false,"usgs":true,"family":"Cook","given":"Alison","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":288587,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Foley, Kevin M. 0000-0003-1013-462X kfoley@usgs.gov","orcid":"https://orcid.org/0000-0003-1013-462X","contributorId":2543,"corporation":false,"usgs":true,"family":"Foley","given":"Kevin","email":"kfoley@usgs.gov","middleInitial":"M.","affiliations":[{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true},{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"preferred":true,"id":288583,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Williams, Richard S. Jr.","contributorId":90679,"corporation":false,"usgs":true,"family":"Williams","given":"Richard S.","suffix":"Jr.","affiliations":[],"preferred":false,"id":288589,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Swithinbank, Charles","contributorId":26368,"corporation":false,"usgs":true,"family":"Swithinbank","given":"Charles","email":"","affiliations":[],"preferred":false,"id":288584,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Fox, Adrian J.","contributorId":68413,"corporation":false,"usgs":true,"family":"Fox","given":"Adrian","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":288588,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Thomson, Janet W.","contributorId":32212,"corporation":false,"usgs":true,"family":"Thomson","given":"Janet","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":288585,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Sievers, Jorn","contributorId":101753,"corporation":false,"usgs":true,"family":"Sievers","given":"Jorn","email":"","affiliations":[],"preferred":false,"id":288590,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70499,"text":"ofr20051164 - 2005 - An assessment of volcanic threat and monitoring capabilities in the United States: Framework for a National Volcano Early Warning System","interactions":[],"lastModifiedDate":"2023-01-05T22:09:05.841334","indexId":"ofr20051164","displayToPublicDate":"2019-10-03T10:30:00","publicationYear":"2005","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2005-1164","displayTitle":"An Assessment of Volcanic Threat and Monitoring Capabilities in the United States: Framework for a National Volcano Early Warning System","title":"An assessment of volcanic threat and monitoring capabilities in the United States: Framework for a National Volcano Early Warning System","docAbstract":"<h1>Executive Summary</h1><p>NVEWS – a National Volcano Early Warning System – is being formulated by the Consortium of U.S. Volcano Observatories (CUSVO) to establish a proactive, fully integrated, national-scale monitoring effort that ensures the most threatening volcanoes in the United States are properly monitored in advance of the onset of unrest and at levels commensurate with the threats posed. Volcanic threat is the combination of hazards (the destructive natural phenomena produced by a volcano) and exposure (people and property at risk from the hazards).</p><p>The United States has abundant volcanoes, and over the past 25 years the Nation has experienced a diverse range of the destructive phenomena that volcanoes can produce. Hazardous volcanic activity will continue to occur, and – because of increasing population, increasing development, and expanding national and international air traffic over volcanic regions – the exposure of human life and enterprise to volcano hazards is increasing. Fortunately, volcanoes exhibit precursory unrest that if detected and analyzed in time allows eruptions to be anticipated and communities at risk to be forewarned with reliable information in sufficient time to implement response plans and mitigation measures.</p><p>In the 25 years since the cataclysmic eruption of Mount St. Helens, scientific and technological advances in volcanology have been used to develop and test models of volcanic behavior and to make reliable forecasts of expected activity a reality. Until now, these technologies and methods have been applied on an ad hoc basis to volcanoes showing signs of activity. However, waiting to deploy a robust, modern monitoring effort until a hazardous volcano awakens and an unrest crisis begins is socially and scientifically unsatisfactory because it forces scientists, civil authorities, citizens, and businesses into “playing catch up” with the volcano, trying to get instruments and civil-defense measures in place before the unrest escalates and the situation worsens. Inevitably, this manner of response results in our missing crucial early stages of the volcanic unrest and hampers our ability to accurately forecast events. Restless volcanoes do not always progress to eruption; nevertheless, monitoring is necessary in such cases to minimize either over-reacting, which costs money, or under-reacting, which may cost lives.</p><p>Volcano monitoring in the U.S. is conducted by five volcano observatories, supported primarily by the USGS Volcano Hazards Program. Under the Stafford Act, the USGS is responsible for issuing timely warnings of potential volcanic disasters to the affected populace and civil authorities. To make maximum use of the Nation’s scientific resources, the USGS operates the observatories with the help of universities and other governmental agencies, through formal partnerships. At present, about half of the most threatening U.S. volcanoes are monitored at a basic level with real-time sensors (primarily seismic arrays), and a few are well monitored with a suite of modern instrument types and methods. However, monitoring capabilities at many hazardous volcanoes are known to be sparse or antiquated, and some hazardous volcanoes have no ground-based monitoring whatsoever.</p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20051164","usgsCitation":"Ewert, J.W., Guffanti, Marianne, and Murray, T.L., 2005, An assessment of volcanic threat and monitoring capabilities in the United States: Framework for a National Volcano Early Warning System: U.S. Geological Survey Open-File Report 2005-1164, 62 p.","productDescription":"62 p.","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":411456,"rank":3,"type":{"id":36,"text":"NGMDB Index 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Factors</li><li>Gap Analysis for a National Volcanic Early Warning System</li><li>Implementation Framework</li><li>References Cited</li><li>Appendices</li></ul>","publishedDate":"2005-04-29","noUsgsAuthors":false,"publicationDate":"2005-04-29","publicationStatus":"PW","scienceBaseUri":"4f4e4ad9e4b07f02db684cb7","contributors":{"authors":[{"text":"Ewert, John W. 0000-0003-2819-4057 jwewert@usgs.gov","orcid":"https://orcid.org/0000-0003-2819-4057","contributorId":642,"corporation":false,"usgs":true,"family":"Ewert","given":"John","email":"jwewert@usgs.gov","middleInitial":"W.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":282543,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Guffanti, Marianne","contributorId":68257,"corporation":false,"usgs":true,"family":"Guffanti","given":"Marianne","affiliations":[],"preferred":false,"id":282544,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Murray, Thomas L. tlmurray@usgs.gov","contributorId":351,"corporation":false,"usgs":true,"family":"Murray","given":"Thomas L.","email":"tlmurray@usgs.gov","affiliations":[],"preferred":true,"id":282542,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70179242,"text":"70179242 - 2005 - Variations in pesticide tolerance: Chapter 16","interactions":[],"lastModifiedDate":"2016-12-22T13:22:54","indexId":"70179242","displayToPublicDate":"2016-11-01T00:00:00","publicationYear":"2005","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"chapter":"16","title":"Variations in pesticide tolerance: Chapter 16","docAbstract":"<p>A<span id=\"abstract\"> growing body of evidence suggests that a number of amphibian populations have declined in recent years. The cause of these population declines has been difficult to establish because in some instances only a single species is declining while sympatric species are thriving. This chapter discusses the results of research that has been conducted to determine the degree of variation present in amphibians with respect to their response to insecticide exposure. The study assessed the degree of variation in response to an anthropogenic stressor among and within species of frogs in the family Ranidae, focusing on the variation in tolerance of tadpoles to the insecticide carbaryl. Carbaryl acts by inhibiting nervous system acetylcholinesterase, which is a common mode of action among insecticides; thus, carbaryl can serve as a model chemical with which to examine amphibian responses. The study also analyzed variation in a hierarchical fashion to identify where variation was the greatest: among nine ranid species, among populations within a single species, and within populations of southern leopard frogs.</span><br data-mce-bogus=\"1\"></p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Amphibian declines: The conservation status of United States species","language":"English","publisher":"University of California Press","publisherLocation":"Berkeley, CA","doi":"10.1525/california/9780520235922.003.0016","isbn":"9780520235922","usgsCitation":"Bridges, C.M., and Semlitsch, R.D., 2005, Variations in pesticide tolerance: Chapter 16, chap. 16 <i>of</i> Amphibian declines: The conservation status of United States species, p. 93-95, https://doi.org/10.1525/california/9780520235922.003.0016.","productDescription":"3 p.","startPage":"93","endPage":"95","costCenters":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"links":[{"id":332484,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"585cf4fce4b01224f329bcba","contributors":{"editors":[{"text":"Lannoo, Michael","contributorId":32823,"corporation":false,"usgs":true,"family":"Lannoo","given":"Michael","affiliations":[],"preferred":false,"id":656503,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Bridges, Christine M.","contributorId":173847,"corporation":false,"usgs":false,"family":"Bridges","given":"Christine","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":656501,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Semlitsch, Raymond D.","contributorId":174906,"corporation":false,"usgs":false,"family":"Semlitsch","given":"Raymond","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":656502,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70174608,"text":"70174608 - 2005 - Preliminary results from a shallow water benthic grazing study","interactions":[],"lastModifiedDate":"2020-04-10T13:30:52.692041","indexId":"70174608","displayToPublicDate":"2016-01-06T03:30:00","publicationYear":"2005","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3914,"text":"Interagency Ecological Program Newsletter","active":true,"publicationSubtype":{"id":10}},"title":"Preliminary results from a shallow water benthic grazing study","docAbstract":"<p>The nutrient-rich, shallow waters of San Francisco Bay support high rates of primary production, limited not by nutrients but by light availability and benthic grazing (Alpine and others 1992; Cloern 1982). Phytoplankton blooms are an important food source for upper trophic levels. Consequently animal populations, such as fish, may suffer under conditions of high benthic bivalve grazing. It has been hypothesized that several species of fish are suffering as a result of severe decreases in available phytoplankton since the introduction of Potamocorbula amurensis into San Francisco Bay (Feyrer 2003).</p>\n<p>The extent of reduction in phytoplankton biomass by benthic bivalves is dependent on both physical and biological factors in addition to their spatial and temporal variability. Physical factors identified as important include: (1) vertical mixing rates, which are a function of wind velocity, currents, and bottom roughness; (2) suspended sediment concentrations; and (3) phytoplankton settling rates. The biological factors controlling the extent of phytoplankton grazing include animal density and organism size, pumping rate, food type and concentration, metabolic demands, assimilation efficiency, and behaviour (Wildish and Kristmanson 1997).</p>\n<p>Several laboratory studies involving model and live clams have shown that benthic grazers can deplete phytoplankton in the water column (for example, Cole and others 1992). Initially, these studies assumed that the water&nbsp;column remained well mixed above benthic suspension feeders; therefore, parameters measured in the bulk water column were believed to be representative of available particle concentration. For this reason many relationships describing the influence of the bulk flow and bulk seston concentration on benthic grazers physiological processes exist (for example, Levinton 1991).&nbsp;</p>\n<p>Laboratory measurements using live animals have shown that filtration rates vary with free stream velocity (for example, Levinton 1991). Increases in current speed lead to an increase in filtration rate; however, several studies have shown that filtration may cease at some critical current speed. It has been suggested that resuspension, occurring as a result of high current speeds, may be a factor that negatively affects uptake (Cloern 1987; Levinton 1991). Several mechanisms have been invoked to explain the effects of low speed on growth rates of active suspension feeders. These mechanisms include the formation of a concentration boundary layer and the limiting horizontal flux of seston. It is now accepted that a combination of these factors dictates the growth success of benthic grazers in a particular area.</p>\n<p>Several field studies have shown that concentration boundary layers can form over benthic ecosystems (for example, Frechette and others 1989, Dolmer 2000); however, many of these studies have failed to measure the hydrodynamics needed to calculate benthic grazing rates. Furthermore, calculating benthic grazing rates with vertical measurements at a single point is problematic due to lack of knowledge of the horizontal gradients in seston (Thompson and others, forthcoming).</p>\n<p>Despite great improvements in our knowledge on the effects of benthic grazers on seston concentrations in water columns, the effects of different hydrodynamic conditions on grazing rates has not been formulated. This makes it difficult to assess the system-wide effect of the benthic ecosystem on phytoplankton concentrations. Furthermore, it affects our ability to predict the potential success of a benthic species, such as the invasive clams Corbicula fluminea and Potamocorbula amurensis. This paper presents the preliminary results of a control volume approach to elucidate the effect of different hydrodynamic conditions on the grazing rates of Corbicula fluminea.</p>","language":"English","publisher":"Interagency Ecological Program for the San Francisco Estuary","publisherLocation":"","collaboration":"","usgsCitation":"Jones, N., Monismith, S., and Thompson, J.K., 2005, Preliminary results from a shallow water benthic grazing study: Interagency Ecological Program Newsletter, v. 18, no. 1, p. 7-13.","productDescription":"7 p.","startPage":"7","endPage":"13","numberOfPages":"7","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":325216,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","county":"San Francisco","city":"San Francisco","otherGeospatial":"San Francisco Bay area","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -123.03314208984374,\n              37.14499280340638\n            ],\n            [\n              -123.03314208984374,\n              38.30933576918588\n            ],\n            [\n              -121.2506103515625,\n              38.30933576918588\n            ],\n            [\n              -121.2506103515625,\n              37.14499280340638\n            ],\n            [\n              -123.03314208984374,\n              37.14499280340638\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"18","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"57876631e4b0d27deb36e1a6","contributors":{"authors":[{"text":"Jones, N.L.","contributorId":19397,"corporation":false,"usgs":true,"family":"Jones","given":"N.L.","email":"","affiliations":[],"preferred":false,"id":642419,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Monismith, Stephen G.","contributorId":57228,"corporation":false,"usgs":true,"family":"Monismith","given":"Stephen G.","affiliations":[],"preferred":false,"id":642420,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Thompson, Janet K. 0000-0002-1528-8452 jthompso@usgs.gov","orcid":"https://orcid.org/0000-0002-1528-8452","contributorId":1009,"corporation":false,"usgs":true,"family":"Thompson","given":"Janet","email":"jthompso@usgs.gov","middleInitial":"K.","affiliations":[{"id":36183,"text":"Hydro-Ecological Interactions Branch","active":true,"usgs":true},{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":642421,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70004363,"text":"70004363 - 2005 - Late Quaternary history of the Atacama Desert","interactions":[],"lastModifiedDate":"2015-09-10T10:17:59","indexId":"70004363","displayToPublicDate":"2015-09-02T01:00:00","publicationYear":"2005","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"chapter":"6","title":"Late Quaternary history of the Atacama Desert","docAbstract":"<p>Of the major subtropical deserts found in the Southern Hemisphere, the Atacama Desert is the driest. Throughout the Quaternary, the most pervasive climatic influence on the desert has been millennial-scale changes in the frequency and seasonality of the scant rainfall, and associated shifts in plant and animal distributions with elevation along the eastern margin of the desert. Over the past six years, we have mapped modern vegetation gradients and developed a number of palaeoenvironmental records, including vegetation histories from fossil rodent middens, groundwater levels from wetland (spring) deposits, and lake levels from shoreline evidence, along a 1200-kilometre transect (16&ndash;26&deg;S) in the Atacama Desert. A strength of this palaeoclimate transect has been the ability to apply the same methodologies across broad elevational, latitudinal, climatic, vegetation and hydrological gradients. We are using this transect to reconstruct the histories of key components of the South American tropical (summer) and extratropical (winter) rainfall belts, precisely at those elevations where average annual rainfall wanes to zero. The focus has been on the transition from sparse, shrubby vegetation (known as the prepuna) into absolute desert, an expansive hyperarid terrain that extends from just above the coastal fog zone (approximately 800 metres) to more than 3500 metres in the most arid sectors in the southern Atacama.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"23&#176 S: Archaeology and Environmental History of the Southern Deserts","largerWorkSubtype":{"id":15,"text":"Monograph"},"language":"English","publisher":"National Museum of Australia Press","isbn":"1876944307","usgsCitation":"Latorre, C., Betancourt, J.L., Rech, J.A., Quade, J., Holmgren, C., Placzek, C., Maldonado, A., Vuille, M., and Rylander, K., 2005, Late Quaternary history of the Atacama Desert, chap. 6 <i>of</i> 23&#176 S: Archaeology and Environmental History of the Southern Deserts, p. 73-90.","productDescription":"18 p.","startPage":"73","endPage":"90","numberOfPages":"18","onlineOnly":"N","additionalOnlineFiles":"N","ipdsId":"IP-028825","costCenters":[],"links":[{"id":307995,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Argetina, Bolivia, Chile, Peru","otherGeospatial":"Atacama Desert","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -76.1572265625,\n              -13.111580118251648\n            ],\n            [\n              -76.201171875,\n              -14.3069694978258\n            ],\n            [\n              -74.92675781249999,\n              -15.876809064146757\n            ],\n            [\n              -73.564453125,\n              -16.63619187839765\n            ],\n            [\n              -71.103515625,\n              -18.22935133838667\n            ],\n            [\n              -70.7958984375,\n              -20.509354588714576\n            ],\n            [\n              -70.7958984375,\n              -22.024545601240327\n            ],\n            [\n              -70.9716796875,\n              -24.206889622398023\n            ],\n            [\n              -71.2353515625,\n              -26.15543796871355\n            ],\n            [\n              -70.1806640625,\n              -26.03704188651583\n            ],\n            [\n              -69.08203125,\n              -25.720735134412095\n            ],\n            [\n              -68.2470703125,\n              -24.647017162630352\n            ],\n            [\n              -67.7197265625,\n              -23.40276490540795\n            ],\n            [\n              -70.927734375,\n              -16.46769474828897\n            ],\n            [\n              -74.1796875,\n              -14.136575651477932\n            ],\n            [\n              -76.1572265625,\n              -13.111580118251648\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"55f15830e4b0dacf699eb969","contributors":{"editors":[{"text":"Smith, Mike","contributorId":147460,"corporation":false,"usgs":false,"family":"Smith","given":"Mike","email":"","affiliations":[],"preferred":false,"id":571797,"contributorType":{"id":2,"text":"Editors"},"rank":1},{"text":"Hesse, Paul","contributorId":147461,"corporation":false,"usgs":false,"family":"Hesse","given":"Paul","email":"","affiliations":[],"preferred":false,"id":571798,"contributorType":{"id":2,"text":"Editors"},"rank":2}],"authors":[{"text":"Latorre, Claudio","contributorId":94019,"corporation":false,"usgs":true,"family":"Latorre","given":"Claudio","affiliations":[],"preferred":false,"id":571788,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Betancourt, Julio L. 0000-0002-7165-0743 jlbetanc@usgs.gov","orcid":"https://orcid.org/0000-0002-7165-0743","contributorId":3376,"corporation":false,"usgs":true,"family":"Betancourt","given":"Julio","email":"jlbetanc@usgs.gov","middleInitial":"L.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true},{"id":554,"text":"Science and Decisions Center","active":true,"usgs":true},{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":571789,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rech, Jason A.","contributorId":30730,"corporation":false,"usgs":true,"family":"Rech","given":"Jason","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":571790,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Quade, Jay","contributorId":22108,"corporation":false,"usgs":false,"family":"Quade","given":"Jay","affiliations":[{"id":7042,"text":"University of Arizona","active":true,"usgs":false}],"preferred":false,"id":571791,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Holmgren, Camille","contributorId":59924,"corporation":false,"usgs":true,"family":"Holmgren","given":"Camille","affiliations":[],"preferred":false,"id":571792,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Placzek, Christa","contributorId":80389,"corporation":false,"usgs":true,"family":"Placzek","given":"Christa","email":"","affiliations":[],"preferred":false,"id":571793,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Maldonado, Antonio","contributorId":65707,"corporation":false,"usgs":true,"family":"Maldonado","given":"Antonio","email":"","affiliations":[],"preferred":false,"id":571794,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Vuille, Mathias","contributorId":147457,"corporation":false,"usgs":false,"family":"Vuille","given":"Mathias","email":"","affiliations":[],"preferred":false,"id":571795,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Rylander, Kate A.","contributorId":73324,"corporation":false,"usgs":true,"family":"Rylander","given":"Kate A.","affiliations":[],"preferred":false,"id":571796,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}}
,{"id":70160047,"text":"70160047 - 2005 - Assessing climate change effects on mountain ecosystems using integrated models: A case study","interactions":[],"lastModifiedDate":"2015-12-09T14:58:26","indexId":"70160047","displayToPublicDate":"2015-07-12T08:00:00","publicationYear":"2005","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Assessing climate change effects on mountain ecosystems using integrated models: A case study","docAbstract":"<p>Mountain systems are characterized by strong environmental gradients, rugged topography and extreme spatial heterogeneity in ecosystem structure and composition. Consequently, most mountainous areas have relatively high rates of endemism and biodiversity, and function as species refugia in many areas of the world. Mountains have long been recognized as critical entities in regional climatic and hydrological dynamics but their importance as terrestrial carbon stores has only been recently underscored (Schimel et al. 2002; this volume). Mountain ecosystems, therefore, are globally important as well as unusually complex. These ecosystems challenge our ability to understand their dynamics and predict their response to climatic variability and global-scale environmental change.</p>\n<p><span>To meet this challenge, mountain scientists increasingly are modeling the vast array of relationships that comprise ecosystem dynamics. Dynamic modeling can examine the interactions between land management strategies and climatic change to develop appropriate responses to future human demands on mountain systems. Modeling provides spatially and temporally explicit, quantified results that can be&nbsp;validated in the field, thus providing feedback to our understanding of ecosystem dynamics. Modeling results, particularly maps and other visual tools, also give a concrete dimension to our understanding of the scale and magnitude of potential future changes. Modeling alerts scientists and land managers to apparently counter-intuitive outcomes of ecosystem responses to climate change or management decisions. For instance, in an early modeling exercise for northwest Montana, USA, Running and Nemani (1991) found that streamflow in a warmer future climate decreased by 30% in the Swan Range even when precipitation was increased by 10% in a particular climate change scenario. This unexpected response was due to enhanced forest growth, and increased evapotranspiration, resulting from the earlier snowmelt and extended growing season. There is a rich legacy of models that address climate and weather, hydrology, forest growth&nbsp;</span>(e.g. gap dynamics and succession), forest fires (e.g. fuel loading) and land cover change (cf. Bugmann et al., this volume). Much less common, however, are attempts to fully integrate models from various disciplines to create a robust system that adequately addresses the entire range of ecosystem dynamics. In addition, fine-resolution modeling of entire mountain ranges (i.e. regional ecosystem scale) is not as common as global or continental scale modeling or watershed/catchment scale modeling. However, this is the scale that is germane to policy decisions such as in the western US and Canada, i.e. in those areas that contain most of the mountainous terrain of North America. This paper describes our efforts to implement an integrated regional modeling approach while characterizing potential future responses of a mountain ecosystem to climate change. Our study area was Glacier National Park in northwestern Montana, USA. Glacier Park is a 4082 km&rdquo; mountain wilderness that straddles the continental divide and contains over 150 summits of up to 3150 m elevation in the Lewis and Livingston mountain ranges.</p>\n<p>&nbsp;</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Global change and mountain regions: An overview of current knowledge","largerWorkSubtype":{"id":15,"text":"Monograph"},"language":"English","publisher":"Springer","usgsCitation":"Fagre, D.B., Running, S.W., Keane, R.E., and Peterson, D.L., 2005, Assessing climate change effects on mountain ecosystems using integrated models: A case study, chap. <i>of</i> Global change and mountain regions: An overview of current knowledge, p. 489-500.","productDescription":"12 p.","startPage":"489","endPage":"500","numberOfPages":"12","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"links":[{"id":312087,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":312086,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://www.springer.com/us/book/9781402035067"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56695ec2e4b08895842a1c71","contributors":{"authors":[{"text":"Fagre, Daniel B. 0000-0001-8552-9461 dan_fagre@usgs.gov","orcid":"https://orcid.org/0000-0001-8552-9461","contributorId":2036,"corporation":false,"usgs":true,"family":"Fagre","given":"Daniel","email":"dan_fagre@usgs.gov","middleInitial":"B.","affiliations":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"preferred":true,"id":581710,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Running, Steven W. 0000-0001-6906-3841","orcid":"https://orcid.org/0000-0001-6906-3841","contributorId":53258,"corporation":false,"usgs":false,"family":"Running","given":"Steven","email":"","middleInitial":"W.","affiliations":[{"id":7089,"text":"University of Montana, Missoula, MT","active":true,"usgs":false}],"preferred":false,"id":581711,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Keane, Robert E.","contributorId":73930,"corporation":false,"usgs":true,"family":"Keane","given":"Robert","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":581712,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Peterson, David L.","contributorId":94643,"corporation":false,"usgs":false,"family":"Peterson","given":"David","email":"","middleInitial":"L.","affiliations":[{"id":12647,"text":"U.S. Forest Service, Pacific Northwest Research Station","active":true,"usgs":false}],"preferred":false,"id":581713,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70006449,"text":"70006449 - 2005 - An evaluation of effects of groundwater exchange on nearshore habitats and water quality of western Lake Erie","interactions":[],"lastModifiedDate":"2018-11-05T09:50:41","indexId":"70006449","displayToPublicDate":"2012-06-19T09:44:00","publicationYear":"2005","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2330,"text":"Journal of Great Lakes Research","active":true,"publicationSubtype":{"id":10}},"title":"An evaluation of effects of groundwater exchange on nearshore habitats and water quality of western Lake Erie","docAbstract":"<p>Historically, the high potentiometric surface of groundwater in the Silurian/Devonian carbonate aquifer in Monroe County, MI resulted in discharge of highly mineralized, SO<sub>4</sub>-rich groundwater to the Lake Erie shoreline near both Erie State Game Area (ESGA) and Pointe Mouillee State Game Area (PMSGA). Recently, regional groundwater levels near PMSGA have been drawn down as much as 45 m below lake level in apparent response to quarry dewatering. From August to November of 2003, we conducted preliminary studies of groundwater flow dynamics and chemistry, shallow lake water chemistry, and fish and invertebrate communities at both sites. Consistent with regional observations, groundwater flow direction in the nearshore at ESGA was upward, or toward Lake Erie, and shallow nearshore groundwater chemistry was influenced by regional groundwater chemistry. In contrast, at PMSGA, the groundwater flow potential was downward and lake water, influenced by quarry discharge seeping downward into nearshore sediments, produced a different lake and shallow groundwater chemistry than at ESGA. Although the invertebrate and young fish community was similar at the two sites, taxonomic groups tolerant of degraded water quality were more prevalent at PMSGA. Sensitive taxa were more prevalent at ESGA. We propose a conceptual model, based on well-described models of groundwater/seawater interaction along coastal margins, to describe the interconnection among geologic, hydrologic, chemical, and biological processes in the different nearshore habitats of Lake Erie, and we identify processes that warrant further detailed study in the Great Lakes.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/S0380-1330(05)70289-6","usgsCitation":"Haack, S.K., Neff, B., Rosenberry, D.O., Savino, J.F., and Lundstrom, S.C., 2005, An evaluation of effects of groundwater exchange on nearshore habitats and water quality of western Lake Erie: Journal of Great Lakes Research, v. 31, p. 45-63, https://doi.org/10.1016/S0380-1330(05)70289-6.","productDescription":"19 p.","startPage":"45","endPage":"63","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":257989,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"Lake Erie","volume":"31","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ea4ae4b0c8380cd48769","contributors":{"authors":[{"text":"Haack, Sheridan K. skhaack@usgs.gov","contributorId":1982,"corporation":false,"usgs":true,"family":"Haack","given":"Sheridan","email":"skhaack@usgs.gov","middleInitial":"K.","affiliations":[{"id":382,"text":"Michigan Water Science Center","active":true,"usgs":true}],"preferred":true,"id":354519,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Neff, Brian P.","contributorId":27548,"corporation":false,"usgs":true,"family":"Neff","given":"Brian P.","affiliations":[],"preferred":false,"id":354522,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rosenberry, Donald O. 0000-0003-0681-5641 rosenber@usgs.gov","orcid":"https://orcid.org/0000-0003-0681-5641","contributorId":1312,"corporation":false,"usgs":true,"family":"Rosenberry","given":"Donald","email":"rosenber@usgs.gov","middleInitial":"O.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":354518,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Savino, Jacqueline F. jsavino@usgs.gov","contributorId":2213,"corporation":false,"usgs":true,"family":"Savino","given":"Jacqueline","email":"jsavino@usgs.gov","middleInitial":"F.","affiliations":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"preferred":true,"id":354520,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Lundstrom, Scott C. 0000-0003-4149-2219 sclundst@usgs.gov","orcid":"https://orcid.org/0000-0003-4149-2219","contributorId":2446,"corporation":false,"usgs":true,"family":"Lundstrom","given":"Scott","email":"sclundst@usgs.gov","middleInitial":"C.","affiliations":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"preferred":true,"id":354521,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70006452,"text":"70006452 - 2005 - A novel approach to fitting the von Bertalanffy relationship to a mixed stock of Atlantic sturgeon harvested off the New Jersey Coast","interactions":[],"lastModifiedDate":"2016-05-09T13:21:44","indexId":"70006452","displayToPublicDate":"2012-06-18T12:54:00","publicationYear":"2005","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2898,"text":"Northeastern Naturalist","active":true,"publicationSubtype":{"id":10}},"title":"A novel approach to fitting the von Bertalanffy relationship to a mixed stock of Atlantic sturgeon harvested off the New Jersey Coast","docAbstract":"<p><span>We examined the growth characteristics of 303 Atlantic sturgeon,&nbsp;</span><i>Acipenser oxyrinchus</i><span>, caught in the commercial fishery off the New Jersey coast from 1992 to 1994 (fork length range: 93&ndash;219 cm). Sections taken from the leading pectoral fin ray were used to age each sturgeon. Ages ranged from 5&ndash;26 years. Von Bertalanffy growth models for males and females fit well, but test statistics (t-test, maximum likelihood) failed to reject the null hypothesis that growth was not significantly different between sexes. Consequently, all data were pooled and the combined data gave L</span><sub>&infin;</sub><span>&nbsp;and K estimates of 174.2 cm and 0.144, respectively. Our growth data do not fit the pattern of slower growth and increased size in more northernly latitudes for Atlantic sturgeon observed in other work. Lack of uniformity of our growth data may be due to (1) the sturgeon fishery harvesting multiple stocks having different growth rates, and (2) size limits for the commercial fishery having created a bias in estimating growth parameters.</span></p>","language":"English","publisher":"Eagle Hill Institute","publisherLocation":"Steuben, ME","doi":"10.1656/1092-6194(2005)012[0195:ANATFT]2.0.CO;2","usgsCitation":"Johnson, J.H., McKenna, J., Dropkin, D.S., and Andrews, W.D., 2005, A novel approach to fitting the von Bertalanffy relationship to a mixed stock of Atlantic sturgeon harvested off the New Jersey Coast: Northeastern Naturalist, v. 12, no. 2, p. 195-202, https://doi.org/10.1656/1092-6194(2005)012[0195:ANATFT]2.0.CO;2.","productDescription":"8 p.","startPage":"195","endPage":"202","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":257923,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"New Jersey","volume":"12","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e4c7e4b0c8380cd4690c","contributors":{"authors":[{"text":"Johnson, James H. 0000-0002-5619-3871 jhjohnson@usgs.gov","orcid":"https://orcid.org/0000-0002-5619-3871","contributorId":389,"corporation":false,"usgs":true,"family":"Johnson","given":"James","email":"jhjohnson@usgs.gov","middleInitial":"H.","affiliations":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"preferred":true,"id":354531,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McKenna, James E. Jr.","contributorId":56992,"corporation":false,"usgs":true,"family":"McKenna","given":"James E.","suffix":"Jr.","affiliations":[],"preferred":false,"id":354534,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Dropkin, David S.","contributorId":34784,"corporation":false,"usgs":true,"family":"Dropkin","given":"David","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":354532,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Andrews, William D.","contributorId":45969,"corporation":false,"usgs":true,"family":"Andrews","given":"William","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":354533,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70003995,"text":"70003995 - 2005 - Pollen analyses from a 50 000-yr rodent midden series in the southern Atacama Desert (25° 30' S)","interactions":[],"lastModifiedDate":"2022-05-24T16:22:29.761288","indexId":"70003995","displayToPublicDate":"2011-10-05T00:00:00","publicationYear":"2005","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2437,"text":"Journal of Quaternary Science","active":true,"publicationSubtype":{"id":10}},"title":"Pollen analyses from a 50 000-yr rodent midden series in the southern Atacama Desert (25° 30' S)","docAbstract":"<p><span>Precipitation in northern Chile is controlled by two great wind belts—the southern westerlies over the southern Atacama and points south (&gt; 24° S) and the tropical easterlies over the northern and central Atacama Desert (16–24° S). At the intersection of these summer and winter rainfall regimes, respectively, is a Mars-like landscape consisting of expansive surfaces devoid of vegetation (i.e. absolute desert) except in canyons that originate high enough to experience runoff once every few years. Pollen assemblages from 39 fossil rodent middens in one of these canyons, Quebrada del Chaco (25° 30′ S), were used to infer the history of vegetation and precipitation at three elevations (2670–2800 m; 3100–3200 m; 3450–3500 m) over the past 50 000 years. When compared to modern conditions and fossil records to the north and south, the pollen evidence indicates more winter precipitation at &gt; 52, 40–33, 24–17 k cal. yr BP, more precipitation in both seasons at 17–14 k cal. yr BP, and more summer precipitation from 14–11 k cal. yr BP. Younger middens are scarce at Quebrada del Chaco, and the few Holocene samples indicate hyperarid conditions comparable to today. The only exception is a pollen assemblage that indicates a brief but significant interlude of increased winter precipitation in the last millennium.</span></p>","language":"English","publisher":"Wiley","doi":"10.1002/jqs.936","usgsCitation":"Maldonado, A., Betancourt, J.L., Latorre, C., and Villagran, C., 2005, Pollen analyses from a 50 000-yr rodent midden series in the southern Atacama Desert (25° 30' S): Journal of Quaternary Science, v. 20, no. 5, p. 493-507, https://doi.org/10.1002/jqs.936.","productDescription":"15 p.","startPage":"493","endPage":"507","costCenters":[{"id":148,"text":"Branch of Regional Research-Western Region","active":false,"usgs":true}],"links":[{"id":489997,"rank":1,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://americanae.aecid.es/americanae/es/registros/registro.do?tipoRegistro=MTD&idBib=3261547","text":"External Repository"},{"id":204557,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Chile","otherGeospatial":"Atacama Desert","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -69.94445800781249,\n              -25.626668871238557\n            ],\n            [\n              -68.93920898437499,\n              -25.626668871238557\n            ],\n            [\n              -68.93920898437499,\n              -23.87076873182047\n            ],\n            [\n              -69.94445800781249,\n              -23.87076873182047\n            ],\n            [\n              -69.94445800781249,\n              -25.626668871238557\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"20","issue":"5","noUsgsAuthors":false,"publicationDate":"2005-07-18","publicationStatus":"PW","scienceBaseUri":"4f4e4ad7e4b07f02db684541","contributors":{"authors":[{"text":"Maldonado, Antonio","contributorId":65707,"corporation":false,"usgs":true,"family":"Maldonado","given":"Antonio","email":"","affiliations":[],"preferred":false,"id":350069,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Betancourt, Julio L. 0000-0002-7165-0743 jlbetanc@usgs.gov","orcid":"https://orcid.org/0000-0002-7165-0743","contributorId":3376,"corporation":false,"usgs":true,"family":"Betancourt","given":"Julio","email":"jlbetanc@usgs.gov","middleInitial":"L.","affiliations":[{"id":554,"text":"Science and Decisions Center","active":true,"usgs":true},{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true},{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":350068,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Latorre, Claudio","contributorId":94019,"corporation":false,"usgs":true,"family":"Latorre","given":"Claudio","affiliations":[],"preferred":false,"id":350071,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Villagran, Carolina","contributorId":78202,"corporation":false,"usgs":true,"family":"Villagran","given":"Carolina","email":"","affiliations":[],"preferred":false,"id":350070,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70029148,"text":"70029148 - 2005 - Ecology of Florida black bears in the Okefenokee-Osceola ecosystem","interactions":[],"lastModifiedDate":"2016-04-13T16:25:32","indexId":"70029148","displayToPublicDate":"2010-12-13T00:00:00","publicationYear":"2005","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3773,"text":"Wildlife Monographs","active":true,"publicationSubtype":{"id":10}},"title":"Ecology of Florida black bears in the Okefenokee-Osceola ecosystem","docAbstract":"<p>The population status of the Florida black bear (<i>Ursus americanus floridanus</i>) is problematic within many portions of its range and its potential listing as a federally threatened species has been the subject of legal debate. We studied Florida black bears in 2 areas in the Okefenokee-Osceola ecosystem in southeast Georgia (i.e.,Okefenokee) and north Florida (i.e., Osceola) from 1995 to 1999 to evaluate relationships between population characteristics, habitat conditions, and human activities. Bears in Okefenokee were hunted and those in Osceola were not. We captured 205 different black bears (124M:81F) 345 times from June 1995 to September &nbsp;1998. We obtained 13,573 radiolocations from 87 (16M:71F) individual bears during the study.</p>\n<p>In Okefenokee, black gum (<i>Nyssa sylvatica</i>) and saw palmetto (<i>Serenoa repens</i>) fruits were the most important foods for bears based on scat analysis. In Osceola, corn from white-tailed deer (<i>Odocoileus virginianus</i>) feeders was the most stable food source but saw palmetto was heavily used when available. Corn from deer feeders was not available in Okefenokee. Adult bears in Osceola were 29% heavier than those in Okefenokee (<i>t</i><sub>82</sub>= 3.55, <i>P</i> &lt;0.001).</p>\n<p>The mean annual home-range size for Osceola females (<i>x̄</i>=30.3 km<sup>2</sup> &plusmn; 4.0 [SE], <i>n</i> =53) varied little seasonally or annually and was almost half that of Okefenokee females (55.9 km<sup>2</sup>&plusmn; 6.9, <i>n</i> = 69; <i>Z</i> = &ndash;2.47, <i>P</i> = 0.014). In contrast, radiocollared females in Okefenokee expanded their home ranges during years of poor black gum production. That expansion was most apparent between autumn 1998 and 1999, when mean home-range size for Okefenokee females increased from 14.5 km<sup>2</sup> to 78.4 km<sup>2</sup>, respectively, and included a larger proportion of upland areas open to sport hunting. &nbsp;As a result, 5 females were harvested in the Okefenokee study area during the 1999 bear hunting season compared with only 7 harvested from 1996 to 1998.</p>\n<p>Home ranges of adult female bears were located in areas with disproportionately high loblolly bay (<i>Gordonia lasianthus</i>) and gum-bay-cypress (<i>Taxodium </i>spp.) vegetation associations in Okefenokee and gum-bay-cypress associations in Osceola. The pine vegetation association ranked lower than most other associations within the home ranges of bears in both study areas even though much of the summer and autumn diets of bears included food items found almost exclusively in pine.</p>\n<p>Sixteen mortalities of radiocollared bears were documented in Okefenokee; hunting accounted for 11 (68.8%) of these deaths. The annual survival rate of radiocollared males in Okefenokee was 0.71 (95% CI = 0.53&ndash;0.88) whereas survival of females in Okefenokee was higher (<i>Z </i>=18.87, <i>P</i> &lt;0.001) at 0.89 (95% CI = 0.83&ndash;0.95). The survival rate for females in Osceola was 0.97 (95% CI = 0.92&ndash;1.00). Overall, 67 bears (51M:16F) were killed by hunters in the Okefenokee study area from 1995 to 1999. Based on all radiocollared bears in Okefenokee, many of which resided within areas closed to hunting, we estimated an annual harvest rate of 0.22 (95% CI = 0.03&ndash;0.37) for males and 0.07 (95% CI = 0.01&ndash;0.12) for females. When we excluded those bears that were not in areas open to hunting, however, the annual harvest rate rose to 0.37 (95% CI = 0.07&ndash;0.58) for males and 0.39 (95% CI = 0.09&ndash;0.58) for females.</p>\n<p>Following a black gum shortage in autumn 1995, only 1 of 15 radiocollared females in Okefenokee produced cubs in winter 1996. That low reproductive rate was in contrast to winter 1997, which followed heavy black gum production, when 21 of 22 radiocollared females produced cubs. Reproductive output was more consistent in the Osceola study area, with 46 cubs being produced from 8, 5, and 9 litters in 1997, 1998, and 1999, respectively.</p>\n<p>To estimate population size, we maintained 88 and 94 barbed-wire hair traps during 1999 in the Okefenokee and Osceola study areas, respectively. Using DNA collected at the hair traps, mark&ndash;recapture models produced estimates of 71 bears (95% CI = 59&ndash;91) in Okefenokee and 44 bears (95% CI = 40&ndash;57) in the Osceola study area during 1999. The estimated densities in the Okefenokee and Osceola study areas were 0.12 and 0.14 bears/km<sup>2</sup>, respectively. &nbsp;Alternative density estimates based on the amount of time bears spent within study area boundaries were similar (0.11 and 0.14 bears/km<sup>2</sup> on Okefenokee and Osceola, respectively).</p>\n<p>We used a population model to estimate the effect of harvest in the Okefenokee bear population. Excluding harvest, bears at Osceola experienced higher average annual population growth (&lambda; = 1.184 &plusmn; 0.002) than those at Okefenokee (1.064 &plusmn; 0.002; <i>t</i><sub>18</sub>= 3.93,<i> P</i> = 0.001), most likely due to protection from hunting and higher recruitment. Including the effects of emigration and immigration, we estimated an average annual sustainable harvest at Okefenokee of approximately 9 bears (12.6%), which was slightly less than the average 1995&ndash;1999 annual harvest of 9.4. That level of hunting in Okefenokee is sustainable but likely represents the highest exploitation rate in the region. Our mark&ndash;recapture data from Osceola suggest a high dispersal rate by subadult bears, and our population modeling data support this hypothesis; we documented bears in Okefenokee that originated from Osceola but not the reverse. We speculate that bears from the interior of the Okefenokee National Wildlife Refuge (ONWR), and to some extent northern Florida, served as a source to the population sink caused by hunting mortality in Okefenokee and in the surrounding Georgia counties.</p>\n<p>Corn from deer feeders was the most probable reason for smaller home-range sizes and greater body masses and reproductive output at Osceola. &nbsp;Changes in management to eliminate or reduce baiting for deer with corn would negatively affect the Osceola bear population. On Okefenokee, sporadic black gum and palmetto production influenced harvest rates and cub production and, thus, governed bear population dynamics.</p>\n<p>The U.S. Fish and Wildlife Service (USFWS) concluded in 1998 that listing the Florida black bear as threatened under the Endangered Species Act of 1973 was not warranted. That decision was largely based on the stability and protection afforded to a few subpopulations within the range of the subspecies, which includes the Okefenokee-Osceola subpopulation; our results support that conclusion. However, we suggest that metapopulation processes among the various subpopulations be given greater consideration, with the ultimate goal of managing the sub-species as a unit rather than as an assemblage of independent components. Our study illustrates the importance of travel corridors for maintaining metapopulation processes.</p>","language":"English","publisher":"Wildlife Society","issn":"00840173","usgsCitation":"Dobey, S., Masters, D., Scheick, B., Clark, J.D., Pelton, M., and Sunquist, M., 2005, Ecology of Florida black bears in the Okefenokee-Osceola ecosystem: Wildlife Monographs, no. 158, p. 1-41.","productDescription":"41 p.","startPage":"1","endPage":"41","numberOfPages":"41","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"links":[{"id":237398,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":320041,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://onlinelibrary.wiley.com/doi/10.1111/wmon.2005.158.issue-1/issuetoc"}],"country":"United States","state":"Florida, Georgia","county":"Baker county, Charlton county, Clinch county, Columbia 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,{"id":70170365,"text":"70170365 - 2005 - Bait stations, hard mast, and black bear population growth in Great Smoky Mountains National Park","interactions":[],"lastModifiedDate":"2017-12-15T14:32:38","indexId":"70170365","displayToPublicDate":"2010-12-10T02:30:00","publicationYear":"2005","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Bait stations, hard mast, and black bear population growth in Great Smoky Mountains National Park","docAbstract":"<p><span>Bait-station surveys are used by wildlife managers as an index to American black bear (</span><i>Ursus americanus</i><span>) population abundance, but the relationship is not well established. Hard mast surveys are similarly used to assess annual black bear food availability which may affect mortality and natality rates. We used data collected in Great Smoky Mountains National Park (GSMNP) from 1989 to 2003 to determine whether changes in the bait-station index (&Delta;BSI) were associated with estimated rates of bear population growth (&lambda;) and whether hard mast production was related to bear visitation to baits. We also evaluated whether hard mast production from previous years was related to &lambda;. Estimates of &lambda;&nbsp;were based on analysis of capture-recapture data with the Pradel temporal symmetry estimator. Using the Akaike's Information Criterion (AIC), our analysis revealed no direct relationship between &Delta;BSI and &lambda;. A simulation analysis indicated that our data were adequate to detect a relationship had one existed. Model fit was marginally improved when we added total oak mast production of the previous year as an interaction term suggesting that the BSI was confounded with environmental variables. Consequently the utility of the bait-station survey as a population monitoring technique is questionable at the spatial and temporal scales we studied. Mast survey data, however, were valuable covariates of &lambda;. Population growth for a given year was negatively related to oak mast production 4 and 5 years prior. That finding supported our hypothesis that mast failures can trigger reproductive synchrony, which may not be evident from the trapped sample until years later.</span></p>","language":"English","publisher":"Wildlife Society","doi":"10.2193/0022-541X(2005)69[1633:BSHMAB]2.0.CO;2","usgsCitation":"Clark, J.D., van Manen, F.T., and Pelton, M.R., 2005, Bait stations, hard mast, and black bear population growth in Great Smoky Mountains National Park: Journal of Wildlife Management, v. 69, no. 4, p. 1633-1640, https://doi.org/10.2193/0022-541X(2005)69[1633:BSHMAB]2.0.CO;2.","productDescription":"8 p.","startPage":"1633","endPage":"1640","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"links":[{"id":320173,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"North Carolina, Tennessee","otherGeospatial":"Great Smoky 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Center","active":true,"usgs":true}],"preferred":true,"id":627000,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Pelton, Michael R.","contributorId":168689,"corporation":false,"usgs":false,"family":"Pelton","given":"Michael","email":"","middleInitial":"R.","affiliations":[{"id":7006,"text":"Department of Forestry, Wildlife and Fisheries, University of Tennessee","active":true,"usgs":false}],"preferred":false,"id":627001,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":5224635,"text":"5224635 - 2005 - Effects of hunting on survival of American woodcock in the Northeast","interactions":[],"lastModifiedDate":"2022-05-26T15:12:46.986909","indexId":"5224635","displayToPublicDate":"2010-06-16T12:18:53","publicationYear":"2005","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Effects of hunting on survival of American woodcock in the Northeast","docAbstract":"<p><span>Numbers of American woodcock (</span><i><span class=\"genus-species\">Scolopax minor</span></i><span>) males counted on the annual singing ground survey (SGS) have declined over the last 35 years at an average rate of 2.3% per year in the Eastern Region and 1.8% per year in the Central Region. Although hunting was not thought to be a cause of these declines, mortality caused by hunters can be controlled. Furthermore, there has been no research on effects of hunting mortality on woodcock populations at local and regional levels on the breeding grounds. We used radiotelemetry to determine survival rates and causes of mortality for 913 woodcock captured during fall 1997–2000 on 7 areas in Maine, New Hampshire, Pennsylvania, and Vermont, USA. Three of 7 sites were closed to hunting. For all sites and all years combined, 176 woodcock died, and 130 were censored, of which 39 were censored mortalities. Predation was the major (</span><i>n</i><span>&nbsp;= 134, 76%) cause of mortality. Mammals accounted for 56% of the predation, raptors accounted for 25%, and 19% was attributed to unknown predators. On hunted sites, 36% of the total mortality (</span><i>n</i><span>&nbsp;= 102) was caused by hunting, 63% by predation, and 1 bird starved. Kaplan-Meier survival curves did not differ between hunted and non-hunted sites among years (</span><i>P</i><span>&nbsp;= 0.46). Overall, point estimates of survival did not differ (</span><i>P</i><span>&nbsp;= 0.217) between hunted (SR = 0.636, SE = 0.04) and nonhunted sites (SR = 0.661, SE = 0.08). We modeled hazard rates from hunting and natural mortality events using program MARK. Akaike's Information Criterion supported using a model with common constant hazards from both hunting and natural causes for groups of sites. Groupings of sites for hazard rates from natural causes were not influenced by whether a site was hunted or not. Models detected no effects of woodcock age and sex (</span><i>P</i><span>&nbsp;= 0.52) on survival. Proportional hazards models comparing hunted and nonhunted sites found no effects of age and sex (</span><i>P</i><span>&nbsp;= 0.45), interactions of age, sex, capture weight, and bill length (</span><i>P</i><span>&nbsp;≥ 0.269). Our data suggest that current hunting regulations are not causing lower survival of woodcock.</span></p>","language":"English","publisher":"Wildlife Society","doi":"10.2193/0022-541X(2005)69[1565:EOHOSO]2.0.CO;2","usgsCitation":"McAuley, D.G., Longcore, J.R., Clugston, D.A., Allen, R.B., Weik, A., Williams, S., Dunn, J., Palmer, B., Evans, K., Staats, W., Sepik, G.F., and Halteman, W., 2005, Effects of hunting on survival of American woodcock in the Northeast: Journal of Wildlife Management, v. 69, no. 4, p. 1565-1577, https://doi.org/10.2193/0022-541X(2005)69[1565:EOHOSO]2.0.CO;2.","productDescription":"13 p.","startPage":"1565","endPage":"1577","numberOfPages":"13","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":202164,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Maine, New Hampshire, Pennsylvania, 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 \"}}]}","volume":"69","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a29e4b07f02db611e8c","contributors":{"authors":[{"text":"McAuley, Daniel G. dmcauley@usgs.gov","contributorId":5377,"corporation":false,"usgs":true,"family":"McAuley","given":"Daniel","email":"dmcauley@usgs.gov","middleInitial":"G.","affiliations":[],"preferred":true,"id":342176,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Longcore, Jerry R.","contributorId":45447,"corporation":false,"usgs":true,"family":"Longcore","given":"Jerry","email":"","middleInitial":"R.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":false,"id":342182,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Clugston, David A.","contributorId":172791,"corporation":false,"usgs":true,"family":"Clugston","given":"David","email":"","middleInitial":"A.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":false,"id":342178,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Allen, R. Bradford","contributorId":156366,"corporation":false,"usgs":false,"family":"Allen","given":"R.","email":"","middleInitial":"Bradford","affiliations":[{"id":20327,"text":"Maine Department of Inland Fisheries and Wildlife, Bangor, ME 04401","active":true,"usgs":false}],"preferred":false,"id":342187,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Weik, A.","contributorId":18483,"corporation":false,"usgs":false,"family":"Weik","given":"A.","email":"","affiliations":[],"preferred":false,"id":342177,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Williams, Simon","contributorId":42329,"corporation":false,"usgs":false,"family":"Williams","given":"Simon","affiliations":[],"preferred":false,"id":342180,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Dunn, J.","contributorId":76434,"corporation":false,"usgs":true,"family":"Dunn","given":"J.","affiliations":[],"preferred":false,"id":342185,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Palmer, B.","contributorId":43081,"corporation":false,"usgs":false,"family":"Palmer","given":"B.","email":"","affiliations":[],"preferred":false,"id":342181,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Evans, K.","contributorId":19666,"corporation":false,"usgs":false,"family":"Evans","given":"K.","affiliations":[],"preferred":false,"id":342179,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Staats, W.","contributorId":44267,"corporation":false,"usgs":false,"family":"Staats","given":"W.","email":"","affiliations":[],"preferred":false,"id":342183,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Sepik, Greg F.","contributorId":100055,"corporation":false,"usgs":false,"family":"Sepik","given":"Greg","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":342186,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Halteman, W.","contributorId":65203,"corporation":false,"usgs":false,"family":"Halteman","given":"W.","email":"","affiliations":[],"preferred":false,"id":342184,"contributorType":{"id":1,"text":"Authors"},"rank":12}]}}
,{"id":5224633,"text":"5224633 - 2005 - Evaluation of the landscape surrounding northern bobwhite nest sites: A multiscale analysis","interactions":[],"lastModifiedDate":"2022-05-26T14:42:40.91121","indexId":"5224633","displayToPublicDate":"2010-06-16T12:18:51","publicationYear":"2005","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Evaluation of the landscape surrounding northern bobwhite nest sites: A multiscale analysis","docAbstract":"<p><span>Implementation of the Conservation Reserve Program (CRP) altered the interspersion and abundance of patches of different land-cover types in landscapes of the southeastern United States. Because northern bobwhites (</span><i><span class=\"genus-species\">Colinus virginianus</span></i><span>) are experiencing significant population declines throughout most of their range, including the Southeast, it is critical to understand the impacts of landscape-scale changes in habitat on their reproductive rates. Our objective was to identify components of landscape structure important in predicting nest site selection by bobwhites at different spatial scales in the Upper Coastal Plain of Georgia. We used a Geographic Information System (GIS) and spatial analysis software to calculate metrics of landscape structure near bobwhite nest sites. Logistic regression was used to model the relationship of nest sites to structure within the surrounding landscape at 4 spatial scales. We found that patch density and open-canopy planted pine were consistently important predictor variables at multiple scales, and other variables were important at various scales. The density of different patch types could be increased by thinning rows of pines in large monotypic stands of closed-canopy planted pine stands. Thinning and creating openings in CRP pine plantations should provide increased nesting opportunities for bobwhites. We interpret the support for other variables in our analysis as an indication that various patch configuration lead to different combinations of landscape structure that provide an acceptable range of habitat conditions for bobwhites.</span></p>","language":"English","publisher":"Wildlife Society","doi":"10.2193/0022-541X(2005)69[1528:EOTLSN]2.0.CO;2","usgsCitation":"White, C., Schweitzer, S.H., Moore, C.T., Parnell, I.B., and Lewis-Weis, L.A., 2005, Evaluation of the landscape surrounding northern bobwhite nest sites: A multiscale analysis: Journal of Wildlife Management, v. 69, no. 4, p. 1528-1537, https://doi.org/10.2193/0022-541X(2005)69[1528:EOTLSN]2.0.CO;2.","productDescription":"10 p.","startPage":"1528","endPage":"1537","numberOfPages":"10","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":201996,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"69","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a08e4b07f02db5fa3a6","contributors":{"authors":[{"text":"White, Craig","contributorId":94203,"corporation":false,"usgs":true,"family":"White","given":"Craig","email":"","affiliations":[],"preferred":false,"id":342166,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schweitzer, Sara H.","contributorId":106614,"corporation":false,"usgs":true,"family":"Schweitzer","given":"Sara","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":342168,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Moore, Clinton T. 0000-0002-6053-2880 cmoore@usgs.gov","orcid":"https://orcid.org/0000-0002-6053-2880","contributorId":3643,"corporation":false,"usgs":true,"family":"Moore","given":"Clinton","email":"cmoore@usgs.gov","middleInitial":"T.","affiliations":[{"id":198,"text":"Coop Res Unit Atlanta","active":true,"usgs":true}],"preferred":true,"id":342167,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Parnell, I. B.","contributorId":43891,"corporation":false,"usgs":false,"family":"Parnell","given":"I.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":342165,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Lewis-Weis, L. A.","contributorId":106615,"corporation":false,"usgs":false,"family":"Lewis-Weis","given":"L.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":342169,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":5224604,"text":"5224604 - 2005 - Designing occupancy studies: General advice and allocating survey effort","interactions":[],"lastModifiedDate":"2022-05-23T21:09:38.435591","indexId":"5224604","displayToPublicDate":"2010-06-16T12:18:51","publicationYear":"2005","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2163,"text":"Journal of Applied Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Designing occupancy studies: General advice and allocating survey effort","docAbstract":"<p><span dir=\"ltr\">1.</span><span dir=\"ltr\">The fraction of sampling units in a landscape where a target species is present (occu</span><span dir=\"ltr\">pancy) is an extensively used concept in ecology. Yet in many applications the species </span><span dir=\"ltr\">will not always be detected in a sampling unit even when present, resulting in biased </span><span dir=\"ltr\">estimates of occupancy. Given that sampling units are surveyed repeatedly within a </span><span dir=\"ltr\">r</span><span dir=\"ltr\">elatively short timeframe, a number of similar methods have now been developed to </span><span dir=\"ltr\">provide unbiased occupancy estimates. However, practical guidance on the efficient design </span><span dir=\"ltr\">of occupancy studies has been lacking.</span></p><p><span dir=\"ltr\">2. </span><span dir=\"ltr\">In this paper we comment on a number of general issues related to designing occu</span><span dir=\"ltr\">pancy studies, including the need for clear objectives that are explicitly linked to science </span><span dir=\"ltr\">or management, selection of sampling units, timing of repeat surveys and allocation of </span><span dir=\"ltr\">survey effort. Advice on the number of repeat surveys per sampling unit is considered in </span><span dir=\"ltr\">terms of the variance of the occupancy estimator, for three possible study designs.</span></p><p><span dir=\"ltr\">3. </span><span dir=\"ltr\">We </span><span dir=\"ltr\">r</span><span dir=\"ltr\">ecommend that sampling units should be surveyed a minimum of three times </span><span dir=\"ltr\">w</span><span dir=\"ltr\">hen detection probability is high (&gt; 0·5 survey</span><sup><span dir=\"ltr\">−</span><span dir=\"ltr\">1</span></sup><span dir=\"ltr\">), unless a removal design is used.</span></p><p><span dir=\"ltr\">4. </span><span dir=\"ltr\">We </span><span dir=\"ltr\">f</span><span dir=\"ltr\">ound that an optimal removal design will generally be the most efficient, but we </span><span dir=\"ltr\">suggest it may be less robust to assumption violations than a standard design.</span></p><p><span dir=\"ltr\">5. </span><span dir=\"ltr\">Our results suggest that for a rare species it is more efficient to survey more sampling </span><span dir=\"ltr\">units less intensively, while for a common species fewer sampling units should be surveyed </span><span dir=\"ltr\">more intensively.</span></p><p><span dir=\"ltr\">6. </span><span dir=\"ltr\">Synthesis and applications</span><span dir=\"ltr\">. Reliable inferences can only result from quality data. To </span><span dir=\"ltr\">ma</span><span dir=\"ltr\">ke </span><span dir=\"ltr\">the best use of logistical resources, study objectives must be clearly defined; </span><span dir=\"ltr\">sampling units must be selected, and repeated surveys timed appropriately; and a sufficient </span><span dir=\"ltr\">n</span><span dir=\"ltr\">umber of repeated surveys must be conducted. Failure to do so may compromise the </span><span dir=\"ltr\">integrity of the study. The guidance given here on study design issues is particularly </span><span dir=\"ltr\">a</span><span dir=\"ltr\">pplicable to studies of species occurrence and distribution, habitat selection and </span><span dir=\"ltr\">modelling, metapopulation studies and monitoring programmes.</span></p>","language":"English","publisher":"British Ecological Society","doi":"10.1111/j.1365-2664.2005.01098.x","usgsCitation":"MacKenzie, D.I., and Royle, J., 2005, Designing occupancy studies: General advice and allocating survey effort: Journal of Applied Ecology, v. 42, no. 6, p. 1105-1114, https://doi.org/10.1111/j.1365-2664.2005.01098.x.","productDescription":"10 p.","startPage":"1105","endPage":"1114","numberOfPages":"10","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":201787,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"42","issue":"6","noUsgsAuthors":false,"publicationDate":"2005-11-23","publicationStatus":"PW","scienceBaseUri":"4f4e4aa8e4b07f02db667cf6","contributors":{"authors":[{"text":"MacKenzie, Darryl I.","contributorId":94436,"corporation":false,"usgs":true,"family":"MacKenzie","given":"Darryl","email":"","middleInitial":"I.","affiliations":[],"preferred":false,"id":342050,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Royle, J. Andrew 0000-0003-3135-2167","orcid":"https://orcid.org/0000-0003-3135-2167","contributorId":96221,"corporation":false,"usgs":true,"family":"Royle","given":"J. Andrew","affiliations":[],"preferred":false,"id":342051,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":5224626,"text":"5224626 - 2005 - Agronomie implications of waterfowl management in Mississippi ricefields","interactions":[],"lastModifiedDate":"2022-06-07T13:43:35.479618","indexId":"5224626","displayToPublicDate":"2010-06-16T12:18:51","publicationYear":"2005","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3779,"text":"Wildlife Society Bulletin","onlineIssn":"1938-5463","printIssn":"0091-7648","active":true,"publicationSubtype":{"id":10}},"title":"Agronomie implications of waterfowl management in Mississippi ricefields","docAbstract":"<p><span>Ricefields are important foraging habitat for waterfowl and other waterbirds in several North American wintering areas, including the Mississippi Alluvial Valley (MAV). Rice growers are likely to adopt management practices that provide habitat for waterfowl if agronomic benefits also occur. Therefore, we conducted a replicated field experiment during autumn through spring 1995–1997 to study effects of postharvest field treatment and winter-water management on agronomic variables including biomass of residual rice straw, cool-season grasses and forbs (i.e., winter weeds), and viability of red rice (</span><i>oryza sativa</i><span>&nbsp;var.). The treatment combination of postharvest disking and flooding until early March reduced straw 68%, from 9,938 kg/ha after harvest to 3,209 kg/ha in spring. Treatment combinations that included flooding until early March were most effective in suppressing winter weeds and decreased their biomass in spring by 83% when compared to the average of other treatment combinations. Effects of treatment combinations on spring viability of red rice differed between winters, but no significant effects were found within winters. Autumn disking followed by flooding until early March reduced rice straw and suppressed winter weeds the most, but with additional costs. To obtain the most agronomic benefits, we recommend that rice growers forgo autumn disking and flood fields until early March, which will provide moderate straw reduction, good weed suppression, and predicted savings of $22.24–62.93/ha (U.S.) ($9.00–25.47/ac). Maintenance of floods on ricefields until early March also benefits waterfowl and other waterbirds by providing foraging habitat throughout winter.</span></p>","language":"English","publisher":"The Wildlife Society","doi":"10.2193/0091-7648(2005)33[981:AIOWMI]2.0.CO;2","usgsCitation":"Manley, S.W., Kaminski, R.M., Reinecke, K.J., and Gerard, P., 2005, Agronomie implications of waterfowl management in Mississippi ricefields: Wildlife Society Bulletin, v. 33, no. 3, p. 981-992, https://doi.org/10.2193/0091-7648(2005)33[981:AIOWMI]2.0.CO;2.","productDescription":"12 p.","startPage":"981","endPage":"992","numberOfPages":"12","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":202206,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United 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