{"pageNumber":"274","pageRowStart":"6825","pageSize":"25","recordCount":10458,"records":[{"id":70209974,"text":"70209974 - 2004 - Tectonic framework and Late Cenozoic tectonic history of the northern part of Cyprus: Implications for earthquake hazards and regional tectonics","interactions":[],"lastModifiedDate":"2020-05-08T12:05:38.774216","indexId":"70209974","displayToPublicDate":"2003-11-14T12:25:07","publicationYear":"2004","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2184,"text":"Journal of Asian Earth Sciences","active":true,"publicationSubtype":{"id":10}},"title":"Tectonic framework and Late Cenozoic tectonic history of the northern part of Cyprus: Implications for earthquake hazards and regional tectonics","docAbstract":"<p><span>Located near the triple junction of the African, Arabia, and Eurasian Plate, Cyprus has had an active and complex neotectonic history, which includes devastating historical earthquakes. Investigations into the tectonic framework of the northern part of Cyprus provide important insights into regional tectonism of the Eastern Mediterranean and Middle East. The northern part of Cyprus is divided into two tectono-stratigraphic terranes, the boundary of which is the Ovgos fault zone. In the Middle Miocene, the Ovgos fault zone was a marine platform margin, which separated open-marine platform carbonates from deep-marine turbidites. Transpressive movement along easterly and northeasterly trending structures dominated the Late Miocene; deposition and preservation of Messinian evaporites occurred in grabens at intersections of these trends. N–S compression began in the Early Pliocene and produced contractional tectonism along east–west trends, including major thrusting of allochthonous rocks in the Kyrenia Range. Quaternary deformation has been dominated by strike-slip faults along northeast and northwest trends; movement during the Pleistocene occurred on several of these faults; Holocene movement is documented on one of these faults. A seismic hazard is implied for the Nicosia area because its proximity to the Quaternary faults. Since the Miocene, Cyprus has been continuously uplifted, but the tectonic setting is controversial, as some researchers invoke a subduction zone setting and others ascribe to a regime of strike-slip tectonics. Our neotectonic framework is consistent with a restraining bend model for Cyprus in a regional strike-slip regime.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/S1367-9120(03)00095-6","usgsCitation":"Harrison, R., Newell, W.L., Batihanli, H., Panayides, I., McGeehin, J., Mahan, S.A., Ozhur, A., Tsiolakis, E., and Necdet, M., 2004, Tectonic framework and Late Cenozoic tectonic history of the northern part of Cyprus: Implications for earthquake hazards and regional tectonics: Journal of Asian Earth Sciences, v. 23, no. 2, p. 191-210, https://doi.org/10.1016/S1367-9120(03)00095-6.","productDescription":"20 p.","startPage":"191","endPage":"210","costCenters":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"links":[{"id":374542,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Cyprus","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              32.8656005859375,\n              35.146862906756304\n            ],\n            [\n              33.58795166015625,\n              35.180543276002666\n            ],\n            [\n              34.04937744140625,\n              35.30167705397601\n            ],\n            [\n              34.11529541015625,\n              35.38904996691167\n            ],\n            [\n              34.34875488281249,\n              35.50092819950358\n            ],\n            [\n              34.44213867187499,\n              35.58808520476323\n            ],\n            [\n              34.59320068359375,\n              35.655064568953875\n            ],\n            [\n              34.57122802734375,\n              35.706377408871774\n            ],\n            [\n              33.4808349609375,\n              35.34425514918409\n            ],\n            [\n              32.9150390625,\n              35.411438052435464\n            ],\n            [\n              32.8656005859375,\n              35.146862906756304\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"23","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Harrison, Richard W. rharriso@usgs.gov","contributorId":544,"corporation":false,"usgs":true,"family":"Harrison","given":"Richard W.","email":"rharriso@usgs.gov","affiliations":[{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"preferred":true,"id":788654,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Newell, Wayne L. wnewell@usgs.gov","contributorId":2512,"corporation":false,"usgs":true,"family":"Newell","given":"Wayne","email":"wnewell@usgs.gov","middleInitial":"L.","affiliations":[],"preferred":false,"id":788655,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Batihanli, Hilmi","contributorId":12137,"corporation":false,"usgs":true,"family":"Batihanli","given":"Hilmi","email":"","affiliations":[],"preferred":false,"id":788656,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Panayides, Ioannis","contributorId":18471,"corporation":false,"usgs":true,"family":"Panayides","given":"Ioannis","email":"","affiliations":[],"preferred":false,"id":788657,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"McGeehin, John mcgeehin@usgs.gov","contributorId":167455,"corporation":false,"usgs":true,"family":"McGeehin","given":"John","email":"mcgeehin@usgs.gov","affiliations":[{"id":242,"text":"Eastern Geographic Science Center","active":true,"usgs":true},{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"preferred":true,"id":788658,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Mahan, Shannon A. 0000-0001-5214-7774 smahan@usgs.gov","orcid":"https://orcid.org/0000-0001-5214-7774","contributorId":147159,"corporation":false,"usgs":true,"family":"Mahan","given":"Shannon","email":"smahan@usgs.gov","middleInitial":"A.","affiliations":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"preferred":true,"id":788659,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Ozhur, Ayse","contributorId":67613,"corporation":false,"usgs":true,"family":"Ozhur","given":"Ayse","email":"","affiliations":[],"preferred":false,"id":788660,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Tsiolakis, Efthymios","contributorId":39890,"corporation":false,"usgs":true,"family":"Tsiolakis","given":"Efthymios","email":"","affiliations":[],"preferred":false,"id":788661,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Necdet, Mehmet","contributorId":71285,"corporation":false,"usgs":true,"family":"Necdet","given":"Mehmet","email":"","affiliations":[],"preferred":false,"id":788662,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}}
,{"id":58256,"text":"sir20045250 - 2004 - Geologic, water-chemistry, and hydrologic data from multiple-well monitoring sites and selected water-supply wells in the Santa Clara Valley, California, 1999-2003","interactions":[],"lastModifiedDate":"2026-03-11T20:34:13.50592","indexId":"sir20045250","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"2004","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":"2004-5250","title":"Geologic, water-chemistry, and hydrologic data from multiple-well monitoring sites and selected water-supply wells in the Santa Clara Valley, California, 1999-2003","docAbstract":"To better identify the three-dimensional geohydrologic framework of the Santa Clara Valley, lithologic, geologic, geophysical, geomechanical, hydraulic, and water-chemistry data were collected from eight ground-water multiple-well monitoring sites constructed in Santa Clara County, California, as part of a series of cooperative studies between the U.S. Geological Survey and the Santa Clara Valley Water District. The data are being used to update and improve the three-dimensional geohydrologic framework of the basin and to address issues related to water supply, water chemistry, sequence stratigraphy, geology, and geological hazards. This report represents a compilation of data collected from 1999 to 2003, including location and design of the monitoring sites, cone penetrometer borings, geologic logs, lithologic logs, geophysical logs, core analysis, water-chemistry analysis, ground-water-level measurements, and hydraulic and geomechanical properties from wells and core samples.\r\n\r\n\r\n     Exploratory cone penetrometer borings taken in the upper 17 to 130 feet at six of the monitoring sites identified the base of Holocene as no deeper than 75 feet in the central confined area and no deeper than 35 feet in the southern unconfined areas of the valley. Generalized lithologic characterization from the monitoring sites indicates about four to six different aquifer units separated by relatively fine-grained units occur within the alluvial deposits shallower than 860 feet deep. Analysis of geophysical logs indicates that coarse-grained units varied in thickness between 10 and 25 feet in the southeastern unconfined area of the valley and between 50 and 200 feet in the south-central and southwestern areas of the valley. Deviations from temperature-gradient logs indicate that the majority of horizontal ground-water flow occurs above a depth of 775 feet in the south central and above 510 feet in the southeastern areas of the valley. Bulk physical properties from more than 1,150 feet of core samples indicate an average primary-wave velocity of about 5,515 feet per second, a bimodal distribution of density between 2.19 and 2.32 grams per cubic centimeter with an average of 2.16 grams per cubic centimeter, and a magnetic susceptibility that generally ranged between \r\n9 and 40 with an average of 22. \r\n\r\n\r\n     Water-chemistry data indicate that the ground water in the alluvial aquifers generally is low in total dissolved solids and chloride and of good quality. Isotopic data indicate that water from artificial recharge is present throughout the shallower parts of the aquifer system but may not be present toward the center of the valley. The percentage of water from artificial recharge present in ground water ranges from 0 to 61 percent for water-supply wells. The age of most shallow ground water is less than 2,000 years before present, and the age of deeper ground water is as much as 39,900 years before present, as determined from carbon age dates. \r\n\r\n\r\n     Initial water-level data from the multiple-well monitoring sites indicate seasonal water-level fluctuations as great as 60 feet and water-level differences between aquifers as great as 10 feet. The water-level hydrographs indicate different water-level changes and relations between aquifers in different parts of the basin. However, most of these hydrographs indicate the potential for downward water-level gradients, with lower hydraulic heads in the deeper monitoring wells.\r\n\r\n\r\n     Hydraulic properties of selected new monitoring wells indicate that horizontal hydraulic conductivities range from 0.1 to 583 feet per day. Hydraulic testing of selected core samples yielded vertical hydraulic conductivity values ranging from 8 x 10-4 to 0.3 feet per day, and effective porosity values ranging from 0.21 to 0.4. Geomechanical properties estimated from one-dimensional consolidation tests of selected core samples resulted in geometric mean inelastic and elastic specific storage values of 1.5 x 10-","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/sir20045250","usgsCitation":"Newhouse, M., Hanson, R.T., Wentworth, C., Everett, R., Williams, C., Tinsley, J.C., Noce, T., and Carkin, B., 2004, Geologic, water-chemistry, and hydrologic data from multiple-well monitoring sites and selected water-supply wells in the Santa Clara Valley, California, 1999-2003: U.S. Geological Survey Scientific Investigations Report 2004-5250, 142 p., https://doi.org/10.3133/sir20045250.","productDescription":"142 p.","costCenters":[],"links":[{"id":5839,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/sir/2004/5250/index.html","linkFileType":{"id":5,"text":"html"}},{"id":185240,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ae0e4b07f02db687ffe","contributors":{"authors":[{"text":"Newhouse, M.W.","contributorId":65892,"corporation":false,"usgs":true,"family":"Newhouse","given":"M.W.","email":"","affiliations":[],"preferred":false,"id":258568,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hanson, R. T.","contributorId":91148,"corporation":false,"usgs":true,"family":"Hanson","given":"R.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":258569,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wentworth, C. M. 0000-0003-2569-569X","orcid":"https://orcid.org/0000-0003-2569-569X","contributorId":106466,"corporation":false,"usgs":true,"family":"Wentworth","given":"C. M.","affiliations":[],"preferred":false,"id":258570,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Everett, Rhett R. 0000-0001-7983-6270 reverett@usgs.gov","orcid":"https://orcid.org/0000-0001-7983-6270","contributorId":843,"corporation":false,"usgs":true,"family":"Everett","given":"Rhett R.","email":"reverett@usgs.gov","affiliations":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true}],"preferred":false,"id":258563,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Williams, C.F. 0000-0003-2196-5496","orcid":"https://orcid.org/0000-0003-2196-5496","contributorId":20401,"corporation":false,"usgs":true,"family":"Williams","given":"C.F.","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":false,"id":258564,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Tinsley, J. C.","contributorId":65827,"corporation":false,"usgs":true,"family":"Tinsley","given":"J.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":258567,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Noce, T.E.","contributorId":54285,"corporation":false,"usgs":true,"family":"Noce","given":"T.E.","email":"","affiliations":[],"preferred":false,"id":258566,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Carkin, B.A.","contributorId":41524,"corporation":false,"usgs":true,"family":"Carkin","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":258565,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":58165,"text":"ofr20041328 - 2004 - Selected hydrologic data for Sand Cove Wash, Washington County, Utah","interactions":[],"lastModifiedDate":"2017-04-11T09:51:13","indexId":"ofr20041328","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"2004","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":"2004-1328","title":"Selected hydrologic data for Sand Cove Wash, Washington County, Utah","docAbstract":"<p>Southwestern Utah is one of the most arid and fastest growing regions of Utah. Development of new and existing water resources will be required to meet the water needs of the region. Sand Cove Wash, a tributary of the Santa Clara River that flows into Gunlock Reservoir, was investigated as a potential site for diverting peak runoff from the Santa Clara River in order to delay its arrival at the reservoir or to artificially recharge alluvial sediment or the underlying Navajo aquifer. Hydrologic data collected in this study are described and listed in this report. Six boreholes were drilled in Sand Cove</p><p>Wash to determine the vertical and spatial distribution of the alluvial deposits and their hydrologic properties. Nine to 13 feet of fine alluvial sand is underlain by 50 to 70 feet of fine silt and clay. Core samples were analyzed for specific conductance of leachates, particle-size distribution, and saturated vertical hydraulic conductivity. Specific-conductance values of leachates ranged from 23 to 2,940 microsiemens per centimeter. Vertical hydraulic-conductivity values from selected samples ranged from 1.92 x 10<sup>-4</sup> to 2.5 feet per day.</p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Salt Lake City, UT","doi":"10.3133/ofr20041328","collaboration":"Prepared in cooperation with the Washington County Water Conservancy District","usgsCitation":"Norton, A., and Susong, D.D., 2004, Selected hydrologic data for Sand Cove Wash, Washington County, Utah: U.S. Geological Survey Open-File Report 2004-1328, iv, 7 p., https://doi.org/10.3133/ofr20041328.","productDescription":"iv, 7 p.","numberOfPages":"13","onlineOnly":"Y","costCenters":[{"id":610,"text":"Utah Water Science Center","active":true,"usgs":true}],"links":[{"id":184181,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":339524,"rank":3,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2004/1328/PDF/OF2004_1328.pdf"},{"id":5778,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.water.usgs.gov/ofr2004-1328/","linkFileType":{"id":5,"text":"html"}}],"country":"United States","state":"Utah","county":"Washington County","otherGeospatial":"Sand Cove Wash","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -113.6667,\n              37.25\n            ],\n            [\n              -113.7833,\n              37.25\n            ],\n            [\n              -113.7833,\n              37.31667\n            ],\n            [\n              -113.6667,\n              37.31667\n            ],\n            [\n              -113.6667,\n              37.25\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a07e4b07f02db5f9415","contributors":{"authors":[{"text":"Norton, Aaron","contributorId":8175,"corporation":false,"usgs":true,"family":"Norton","given":"Aaron","email":"","affiliations":[],"preferred":false,"id":258428,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Susong, David D. ddsusong@usgs.gov","contributorId":1040,"corporation":false,"usgs":true,"family":"Susong","given":"David","email":"ddsusong@usgs.gov","middleInitial":"D.","affiliations":[{"id":610,"text":"Utah Water Science Center","active":true,"usgs":true}],"preferred":true,"id":258427,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":58234,"text":"sir20045231 - 2004 - Documentation of the Santa Clara Valley regional ground-water/surface-water flow model, Santa Clara Valley, California","interactions":[],"lastModifiedDate":"2026-03-12T14:31:08.396868","indexId":"sir20045231","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"2004","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":"2004-5231","title":"Documentation of the Santa Clara Valley regional ground-water/surface-water flow model, Santa Clara Valley, California","docAbstract":"<p>&nbsp;The Santa Clara Valley is a long, narrow trough extending about 35 miles southeast from the southern end of San Francisco Bay where the regional alluvial-aquifer system has been a major source of water. Intensive agricultural and urban development throughout the 20th century and related ground-water development resulted in ground-water-level declines of more than 200 feet and land subsidence of as much as 12.7 feet between the early 1900s and the mid-1960s. Since the 1960s, Santa Clara Valley Water District has imported surface water to meet growing demands and reduce dependence on ground-water supplies. This importation of water has resulted in a sustained recovery of the ground-water flow system. To help support effective management of the ground-water resources, a regional ground-water/surface-water flow model was developed. This model simulates the flow of ground water and surface water, changes in ground-water storage, and related effects such as land subsidence.</p><p>A numerical ground-water/surface-water flow model of the Santa Clara Valley subbasin of the Santa Clara Valley was developed as part of a cooperative investigation with the Santa Clara Valley Water District. The model better defines the geohydrologic framework of the regional flow system and better delineates the supply and demand components that affect the inflows to and outflows from the regional ground-water flow system. Development of the model includes revisions to the previous ground-water flow model that upgraded the temporal and spatial discretization, added source-specific inflows and outflows, simulated additional flow features such as land subsidence and multi-aquifer wellbore flow, and extended the period of simulation through September 1999. The transient-state model was calibrated to historical surface-water and ground-water data for the period 1970–99 and to historical subsidence for the period 1983–99.</p><p>The regional ground-water flow system consists of multiple aquifers that are grouped into upper- and lower-aquifer systems. Ground-water inflow occurs as natural recharge in the form of streamflow infiltration and areal infiltration of precipitation along stream channels, artificial recharge from infiltration of imported water at recharge ponds and along selected stream channels, and leakage along selected transmission pipelines. Ground-water outflow occurs as evapotranspiration, stream base flow, discharge through pumpage from wells, and subsurface flow to the San Francisco Bay.</p><p>&nbsp;The geohydrologic framework of the regional ground-water flow system was represented as six model layers. The hydraulic properties were redefined on the basis of cell-based lithologic properties that were delineated in terms of aggregate thicknesses of coarse-grained, fine-grained, and mixed textural categories. The regional aquifer systems also are dissected by several laterally extensive faults that may form at least partial barriers to the lateral flow of ground water. The spatial extent of the ground-water flow model was extended and refined to cover the entire Santa Clara Valley, including the Evergreen subregion. The temporal discretization was refined and the period of simulation was extended to 1970–99.</p><p>The model was upgraded to MODFLOW-2000 (MF2K) and was calibrated to fit historical ground-water levels, streamflow, and land subsidence for the period 1970–99. The revised model slightly overestimates measured water levels with an root-mean-square error of -7.34 feet. The streamflow generally shows a good match on gaged creeks and rivers for flows greater than 1.2 cubic feet per second. The revised model also fits the measured deformation at the borehole extensometer site located near San Jose within 16 to 27 percent and the extensometer site near Sunnyvale within 3 percent of the maximum measured seasonal deformation for the deepest extensometers.</p><p>&nbsp;The total ground-water inflow and outflow of about 225,500 acre-feet per year (acre-ft/yr) for the period 1970–89 and of about 205,300 acre-feet per year for the period for the period 1970–99 is comparable with that of the previous model, 207,200 acre-ft/yr for the period 1970–89. Overall the simulated net change in storage increased by about 189,500 acre-ft/yr for the entire period of simulation, which represents about one and a half years of the 1970–99 average pumping. The changes in ground-water flow and storage generally reflect the major climate cycles and the additional importation of water by Santa Clara Valley Water District, with the basin in recovery since the drought of the late 1980s and early 1990s. The average total recharge rate, from natural and artificial recharge and from streamflow infiltration for the revised model for the entire simulation period 1970–99, was about 157,100 acre-ft/yr, which represents about 59 percent of the inflow to the ground-water flow system. The average rate of artificial recharge of about 77,600 acre-ft/yr represents about 30 percent of the inflow to the ground-water flow system. The average pumpage for the entire 29.75-year simulation period is about 133,400 acre-ft/yr and represents about 69 percent of the outflow from the ground-water flow system. Most of the simulated recharge infiltrates and flows through the uppermost layers (i.e. model layers 1 and 3) of the aquifer system. Most of the water that flows to the deeper model layers is occurring through wellbores, with wellbore flow representing 19 percent of the total ground-water inflow between model layers.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/sir20045231","usgsCitation":"Hanson, R.T., Li, Z., and Faunt, C., 2004, Documentation of the Santa Clara Valley regional ground-water/surface-water flow model, Santa Clara Valley, California: U.S. Geological Survey Scientific Investigations Report 2004-5231, 85 p., https://doi.org/10.3133/sir20045231.","productDescription":"85 p.","costCenters":[],"links":[{"id":5817,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/sir/2004/5231/index.html","linkFileType":{"id":5,"text":"html"}},{"id":184208,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Santa Clara 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T.","contributorId":91148,"corporation":false,"usgs":true,"family":"Hanson","given":"R.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":258516,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Li, Zhen zhenli@usgs.gov","contributorId":1004,"corporation":false,"usgs":true,"family":"Li","given":"Zhen","email":"zhenli@usgs.gov","affiliations":[],"preferred":true,"id":258515,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Faunt, C.C. 0000-0001-5659-7529","orcid":"https://orcid.org/0000-0001-5659-7529","contributorId":103314,"corporation":false,"usgs":true,"family":"Faunt","given":"C.C.","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":258517,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70170438,"text":"70170438 - 2003 - Characterizing grazing disturbance in semiarid ecosystems across broad spatial scales using multiple indices.","interactions":[],"lastModifiedDate":"2016-04-20T13:41:50","indexId":"70170438","displayToPublicDate":"2016-01-04T09:15:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1450,"text":"Ecological Applications","active":true,"publicationSubtype":{"id":10}},"title":"Characterizing grazing disturbance in semiarid ecosystems across broad spatial scales using multiple indices.","docAbstract":"<p><span>Although management and conservation strategies continue to move toward broader spatial scales and consideration of many taxonomic groups simultaneously, researchers have struggled to characterize responses to disturbance at these scales. Most studies of disturbance by feral grazers investigate effects on only one or two ecosystem elements across small spatial scales, limiting their applicability to ecosystem-level management. To address this inadequacy, in 1997 and 1998 we examined disturbance created by feral horses (</span><i><span class=\"genusSpeciesInfoAsset\">Equus caballus</span></i><span>) in nine mountain ranges of the western Great Basin, USA, using plants, small mammals, ants, and soil compaction as indicators. Nine horse-occupied and 10 horse-removed sites were stratified into high- and low-elevation groups, and all sites at each elevation had similar vegetation type, aspect, slope gradient, and recent (&ge;15-yr) fire and livestock-grazing histories. Using reciprocal averaging and TWINSPAN analyses, we compared relationships among sites using five data sets: abiotic variables, percent cover by plant species, an index of abundance by plant species, 10 disturbance-sensitive response variables, and grass and shrub species considered &ldquo;key&rdquo; indicators by land managers. Although reciprocal averaging and TWINSPAN analyses of percent cover, abiotic variables, and key species suggested relationships between sites influenced largely by biogeography (i.e., mountain range), disturbance-sensitive variables clearly segregated horse-occupied and horse-removed sites. These analyses suggest that the influence of feral horses on many Great Basin ecosystem attributes is not being detected by monitoring only palatable plant species. We recommend development of an expanded monitoring strategy based not only on established vegetation measurements investigating forage consumption, but also including disturbance-sensitive variables (e.g., soil surface hardness, abundance of ant mounds) that more completely reflect the suite of effects that a large-bodied grazer may impose on mountain ecosystems, independent of vegetation differences. By providing a broader-based mechanism for detection of adverse effects, this strategy would provide management agencies with defensible data in a sociopolitical arena that has been embroiled in conflict for several decades.</span></p>","language":"English","publisher":"Ecological Society of America","doi":"10.1890/1051-0761(2003)013[0119:CGDISE]2.0.CO;2","usgsCitation":"Beever, E.A., Tausch, R.J., and Brussard, P.F., 2003, Characterizing grazing disturbance in semiarid ecosystems across broad spatial scales using multiple indices.: Ecological Applications, v. 13, no. 1, p. 119-136, https://doi.org/10.1890/1051-0761(2003)013[0119:CGDISE]2.0.CO;2.","productDescription":"17 p.","startPage":"119","endPage":"136","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"links":[{"id":320311,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Nevada","otherGeospatial":"Great Basin","volume":"13","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5718a837e4b0ef3b7caba4dd","contributors":{"authors":[{"text":"Beever, Erik A. 0000-0002-9369-486X ebeever@usgs.gov","orcid":"https://orcid.org/0000-0002-9369-486X","contributorId":2934,"corporation":false,"usgs":true,"family":"Beever","given":"Erik","email":"ebeever@usgs.gov","middleInitial":"A.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"preferred":true,"id":627211,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Tausch, Robin J.","contributorId":103977,"corporation":false,"usgs":true,"family":"Tausch","given":"Robin","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":627212,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Brussard, Peter F.","contributorId":111904,"corporation":false,"usgs":true,"family":"Brussard","given":"Peter","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":627213,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70159995,"text":"70159995 - 2003 - Winter diel habitat use and movement by subadult bull trout in the upper Flathead River, Montana","interactions":[],"lastModifiedDate":"2019-12-10T17:39:05","indexId":"70159995","displayToPublicDate":"2015-08-03T08:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2886,"text":"North American Journal of Fisheries Management","active":true,"publicationSubtype":{"id":10}},"title":"Winter diel habitat use and movement by subadult bull trout in the upper Flathead River, Montana","docAbstract":"<p><span>We evaluated the diel habitat use and movement of subadult bull trout&nbsp;</span><i>Salvelinus confluentus</i><span>&nbsp;by use of radiotelemetry during winter in the upper Flathead River, Montana. Of the 13 monitored bull trout, 12 (92%) made at least one diel movement to other habitat locations during their respective day–night tracking surveys and moved an average of 73% of the time. The median distance moved from day to night locations by the mobile fish was 86 m (range, 27–594 m). Diel shifts in habitat use by nine of the tagged fish were related to light intensity; nocturnal emergence generally commenced immediately after the onset of night, and daytime concealment occurred at daybreak. When diel shifts in microhabitat use occurred, subadult bull trout moved from deep, midchannel areas during the day to shallow, low‐velocity areas along the channel margins without overhead cover at night. Resource managers who wish to protect the overwintering habitat features preferred by subadult bull trout in the upper Flathead River should use natural flow management strategies that maximize and stabilize channel margin habitats at night.</span></p>","language":"English","publisher":"American Fisheries Society","doi":"10.1577/1548-8675(2003)023<0163:WDHUAM>2.0.CO;2","usgsCitation":"Muhlfeld, C.C., Glutting, S., Hunt, R., Daniels, D., and Marotz, B., 2003, Winter diel habitat use and movement by subadult bull trout in the upper Flathead River, Montana: North American Journal of Fisheries Management, v. 23, no. 1, p. 163-171, https://doi.org/10.1577/1548-8675(2003)023<0163:WDHUAM>2.0.CO;2.","productDescription":"9 p.","startPage":"163","endPage":"171","numberOfPages":"9","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"links":[{"id":311996,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Montana","otherGeospatial":"Flathead River","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -116.25732421875,\n              46.36967413462374\n            ],\n            [\n              -111.59912109375,\n              46.36967413462374\n            ],\n            [\n              -111.59912109375,\n              48.97300592158682\n            ],\n            [\n              -116.25732421875,\n              48.97300592158682\n            ],\n            [\n              -116.25732421875,\n              46.36967413462374\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"23","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5666bbfee4b06a3ea36c8b61","contributors":{"authors":[{"text":"Muhlfeld, Clint C. 0000-0002-4599-4059 cmuhlfeld@usgs.gov","orcid":"https://orcid.org/0000-0002-4599-4059","contributorId":924,"corporation":false,"usgs":true,"family":"Muhlfeld","given":"Clint","email":"cmuhlfeld@usgs.gov","middleInitial":"C.","affiliations":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true},{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true}],"preferred":true,"id":581462,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Glutting, Steve","contributorId":150376,"corporation":false,"usgs":false,"family":"Glutting","given":"Steve","email":"","affiliations":[{"id":5133,"text":"Montana Fish Wildlife and Parks, Kalispell, Montana 59901","active":true,"usgs":false}],"preferred":false,"id":581463,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hunt, Rick","contributorId":150377,"corporation":false,"usgs":false,"family":"Hunt","given":"Rick","email":"","affiliations":[{"id":5133,"text":"Montana Fish Wildlife and Parks, Kalispell, Montana 59901","active":true,"usgs":false}],"preferred":false,"id":581464,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Daniels, Durae","contributorId":150378,"corporation":false,"usgs":false,"family":"Daniels","given":"Durae","email":"","affiliations":[{"id":5133,"text":"Montana Fish Wildlife and Parks, Kalispell, Montana 59901","active":true,"usgs":false}],"preferred":false,"id":581465,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Marotz, Brian","contributorId":145860,"corporation":false,"usgs":false,"family":"Marotz","given":"Brian","email":"","affiliations":[{"id":16269,"text":"Montana Fish, Wildlife & Parks, Kalispell, Montana 59901 USA","active":true,"usgs":false}],"preferred":false,"id":581466,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70157363,"text":"70157363 - 2003 - Variability of isotope and major ion chemistry in the Allequash Basin, Wisconsin","interactions":[],"lastModifiedDate":"2018-11-16T10:54:35","indexId":"70157363","displayToPublicDate":"2015-06-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"Variability of isotope and major ion chemistry in the Allequash Basin, Wisconsin","docAbstract":"<p>As part of ongoing research conducted at one of the U.S. Geological Survey's Water, Energy, and Biogeochem-ical Budgets sites, work was undertaken to describe the spatial and temporal variability of stream and ground water isotopic composition and cation chemistry in the Trout Lake watershed, to relate the variability to the watershed flow system, and to identify the linkages of geochemical evolution and source of water in the watershed. The results are based on periodic sampling of sites at two scales along Allequash Creek, a small headwater stream in northern Wisconsin. Based on this sampling, there are distinct water isotopic and geochemical differences observed at a smaller hillslope scale and the larger Allequash Creek scale. The variability was larger than expected for this simple watershed, and is likely to be seen in more complex basins. Based on evidence from multiple isotopes and stream chemistry, the flow system arises from three main source waters (terrestrial-, lake-, or wetland-derived recharge) that can be identified along any flowpath using water isotopes together with geochemical characteristics such as iron concentrations. The ground water chemistry demonstrates considerable spatial variability that depends mainly on the flow-path length and water mobility through the aquifer. Calcium concentrations increase with increasing flowpath length, whereas strontium isotope ratios increase with increasing extent of stagnation in either the unsaturated or saturated zones as waters move from source to sink. The flowpath distribution we identify provides important constraints on the calibration of ground water flow models such as that undertaken by Pint et al. (this issue).</p>","language":"English","publisher":"Wiley","doi":"10.1111/j.1745-6584.2003.tb02431.x","usgsCitation":"Walker, J.F., Hunt, R.J., Bullen, T.D., Krabbenhoft, D.P., and Kendall, C., 2003, Variability of isotope and major ion chemistry in the Allequash Basin, Wisconsin: Ground Water, v. 41, no. 7, p. 883-894, https://doi.org/10.1111/j.1745-6584.2003.tb02431.x.","productDescription":"12 p.","startPage":"883","endPage":"894","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":308354,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Wisconsin","otherGeospatial":"Allequash Creek, Northern Highlands, Trout Lake","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -89.75933074951172,\n              45.97453759512536\n            ],\n            [\n              -89.75933074951172,\n              46.103470710854594\n            ],\n            [\n              -89.53514099121094,\n              46.103470710854594\n            ],\n            [\n              -89.53514099121094,\n              45.97453759512536\n            ],\n            [\n              -89.75933074951172,\n              45.97453759512536\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"41","issue":"7","noUsgsAuthors":false,"publicationDate":"2006-03-24","publicationStatus":"PW","scienceBaseUri":"56027c2ce4b03bc34f544894","contributors":{"authors":[{"text":"Walker, John F. jfwalker@usgs.gov","contributorId":1081,"corporation":false,"usgs":true,"family":"Walker","given":"John","email":"jfwalker@usgs.gov","middleInitial":"F.","affiliations":[{"id":677,"text":"Wisconsin Water Science Center","active":true,"usgs":true}],"preferred":true,"id":572876,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hunt, Randall J. 0000-0001-6465-9304 rjhunt@usgs.gov","orcid":"https://orcid.org/0000-0001-6465-9304","contributorId":1129,"corporation":false,"usgs":true,"family":"Hunt","given":"Randall","email":"rjhunt@usgs.gov","middleInitial":"J.","affiliations":[{"id":677,"text":"Wisconsin Water Science Center","active":true,"usgs":true}],"preferred":true,"id":572877,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bullen, Thomas D. 0000-0003-2281-1691 tdbullen@usgs.gov","orcid":"https://orcid.org/0000-0003-2281-1691","contributorId":1969,"corporation":false,"usgs":true,"family":"Bullen","given":"Thomas","email":"tdbullen@usgs.gov","middleInitial":"D.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":572878,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Krabbenhoft, David P. 0000-0003-1964-5020 dpkrabbe@usgs.gov","orcid":"https://orcid.org/0000-0003-1964-5020","contributorId":1658,"corporation":false,"usgs":true,"family":"Krabbenhoft","given":"David","email":"dpkrabbe@usgs.gov","middleInitial":"P.","affiliations":[{"id":677,"text":"Wisconsin Water Science Center","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":37947,"text":"Upper Midwest Water Science Center","active":true,"usgs":true},{"id":37464,"text":"WMA - Laboratory & Analytical Services Division","active":true,"usgs":true}],"preferred":true,"id":572879,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Kendall, Carol 0000-0002-0247-3405 ckendall@usgs.gov","orcid":"https://orcid.org/0000-0002-0247-3405","contributorId":1462,"corporation":false,"usgs":true,"family":"Kendall","given":"Carol","email":"ckendall@usgs.gov","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":572880,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70045623,"text":"70045623 - 2003 - Fluorspar","interactions":[],"lastModifiedDate":"2013-04-27T15:21:39","indexId":"70045623","displayToPublicDate":"2013-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2755,"text":"Mining Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Fluorspar","docAbstract":"The United States had a small quantity of fluorspar production from one mine in Utah during 2002. Most of the fluorspar consumed in the United States continued to come from imports or material purchased from the National Defense Stockpile (NDS). In addition, a small amount of synthetic fluorspar (CaF<sub>2</sub>) was produced from industrial waste streams.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Mining Engineering","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"SME","usgsCitation":"Miller, M., 2003, Fluorspar: Mining Engineering, v. 55, no. 6, p. 26-27.","productDescription":"2 p.","startPage":"26","endPage":"27","costCenters":[{"id":432,"text":"National Minerals Information Center","active":true,"usgs":true}],"links":[{"id":271526,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"55","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"517cf367e4b0d8907b2881b7","contributors":{"authors":[{"text":"Miller, M.","contributorId":13178,"corporation":false,"usgs":false,"family":"Miller","given":"M.","email":"","affiliations":[],"preferred":false,"id":477969,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":5224347,"text":"5224347 - 2003 - The eastern box turtle at the Patuxent Wildlife Research Center 1940s to the present: another view","interactions":[],"lastModifiedDate":"2012-02-02T00:15:30","indexId":"5224347","displayToPublicDate":"2010-06-16T12:18:48","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1608,"text":"Experimental Gerontology","active":true,"publicationSubtype":{"id":10}},"title":"The eastern box turtle at the Patuxent Wildlife Research Center 1940s to the present: another view","docAbstract":"Several long-term mark recapture studies have been conducted on box turtles (Terrapene c. carolina) providing valuable information on life span, basic demography, home range, and apparent effects of environmental changes on box turtle survival.  One of the longest studied populations was first marked in 1942 on the Patuxent Wildlife Research Center in Maryland, and has been surveyed every 10 years until 1995.  The age structure and gender ratio of these turtles in the field may support differential habitat use and survival estimates.  A few of the turtles first marked during the 1945 study are still observed throughout the Center.  Data collected from turtles marked in the more upland habitats during 1985-2002 indicate a younger age class distribution than that observed in the more protected biota of the bottomland floodplain study area.  Extrapolating ages of turtles described in data collected throughout the long-term study, it was estimated that turtles, both males and females, can show reproduction-intent behaviors at ages greater than 54 years old.  It is suggested that count data collection be continued on a more frequent cycle, extending over a larger part of the Center.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Experimental Gerontology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0531-5565(03)00107-4","collaboration":"Proceedings of the 2nd Symposium on Organisms with Slow Aging (SOSA-2)  6215_Henry.pdf","usgsCitation":"Henry, P., 2003, The eastern box turtle at the Patuxent Wildlife Research Center 1940s to the present: another view: Experimental Gerontology, v. 38, no. 7, p. 773-776, https://doi.org/10.1016/S0531-5565(03)00107-4.","productDescription":"773-776","startPage":"773","endPage":"776","numberOfPages":"4","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":17339,"rank":200,"type":{"id":11,"text":"Document"},"url":"https://dx.doi.org/10.1016/S0531-5565(03)00107-4","linkFileType":{"id":5,"text":"html"}},{"id":201724,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"38","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b05e4b07f02db6999fe","contributors":{"authors":[{"text":"Henry, P.F.P.","contributorId":14531,"corporation":false,"usgs":true,"family":"Henry","given":"P.F.P.","email":"","affiliations":[],"preferred":false,"id":341366,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":5224339,"text":"5224339 - 2003 - Preface:  Phragmites australis:  A sheep in wolf's clothing?","interactions":[],"lastModifiedDate":"2012-02-02T00:15:07","indexId":"5224339","displayToPublicDate":"2010-06-16T12:18:48","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1583,"text":"Estuaries","active":true,"publicationSubtype":{"id":10}},"title":"Preface:  Phragmites australis:  A sheep in wolf's clothing?","docAbstract":"A. problem with national priorities for control or prevention of aquatic nuisance species is that we often do not know the full extent of the problem, if there is one.  To address this issue, we hosted a technical forum and workshop-Phragmites australis: A Sheep in Wolf's Clothing?--with a focus on new research and critical reviews that address the role of Phragmites as a noxious weed. ... The Workshop helped focus the national effort in new multidisciplinary research to better understand the ecology of P australis and its ecosystem-level effects on the structure and function of coastal wetlands.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Estuaries","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/BF02823715","collaboration":"6205_Weinstein.pdf","usgsCitation":"Weinstein, M., Keough, J., Guntenspergen, G., and Litvin, S., 2003, Preface:  Phragmites australis:  A sheep in wolf's clothing?: Estuaries, v. 26, no. 2, https://doi.org/10.1007/BF02823715.","productDescription":"397","startPage":"397","numberOfPages":"397","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":17338,"rank":200,"type":{"id":11,"text":"Document"},"url":"https://dx.doi.org/10.1007/BF02823715","linkFileType":{"id":5,"text":"html"}},{"id":198164,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"26","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4acce4b07f02db67e7a2","contributors":{"authors":[{"text":"Weinstein, M.P.","contributorId":25264,"corporation":false,"usgs":true,"family":"Weinstein","given":"M.P.","email":"","affiliations":[],"preferred":false,"id":341340,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Keough, J.R.","contributorId":87880,"corporation":false,"usgs":true,"family":"Keough","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":341342,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Guntenspergen, G.R. 0000-0002-8593-0244","orcid":"https://orcid.org/0000-0002-8593-0244","contributorId":95424,"corporation":false,"usgs":true,"family":"Guntenspergen","given":"G.R.","affiliations":[],"preferred":false,"id":341343,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Litvin, S.Y.","contributorId":59146,"corporation":false,"usgs":true,"family":"Litvin","given":"S.Y.","email":"","affiliations":[],"preferred":false,"id":341341,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":5224361,"text":"5224361 - 2003 - Demographic analysis from summaries of an age-structured population","interactions":[],"lastModifiedDate":"2016-11-02T10:17:16","indexId":"5224361","displayToPublicDate":"2010-06-16T12:18:48","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1039,"text":"Biometrics","active":true,"publicationSubtype":{"id":10}},"title":"Demographic analysis from summaries of an age-structured population","docAbstract":"Demographic analyses of age-structured populations typically rely on life history data for individuals, or when individual animals are not identified, on information about the numbers of individuals in each age class through time. While it is usually difficult to determine the age class of a randomly encountered individual, it is often the case that the individual can be readily and reliably assigned to one of a set of age classes. For example, it is often possible to distinguish first-year from older birds. In such cases, the population age structure can be regarded as a latent variable governed by a process prior, and the data as summaries of this latent structure. In this article, we consider the problem of uncovering the latent structure and estimating process parameters from summaries of age class information. We present a demographic analysis for the critically endangered migratory population of whooping cranes (Grus americana), based only on counts of first-year birds and of older birds. We estimate age and year-specific survival rates. We address the controversial issue of whether management action on the breeding grounds has influenced recruitment, relating recruitment rates to the number of seventh-year and older birds, and examining the pattern of variation through time in this rate.","language":"English","publisher":"International Biometric Society","doi":"10.1111/j.0006-341X.2003.00091.x","usgsCitation":"Link, W., Royle, J., and Hatfield, J.S., 2003, Demographic analysis from summaries of an age-structured population: Biometrics, v. 59, no. 4, p. 778-785, https://doi.org/10.1111/j.0006-341X.2003.00091.x.","productDescription":"8 p.","startPage":"778","endPage":"785","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":201785,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"59","issue":"4","noUsgsAuthors":false,"publicationDate":"2003-12-11","publicationStatus":"PW","scienceBaseUri":"4f4e4ab2e4b07f02db66ed74","contributors":{"authors":[{"text":"Link, William A. wlink@usgs.gov","contributorId":3465,"corporation":false,"usgs":true,"family":"Link","given":"William A.","email":"wlink@usgs.gov","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":false,"id":341408,"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":341410,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hatfield, Jeff S.","contributorId":95187,"corporation":false,"usgs":true,"family":"Hatfield","given":"Jeff","email":"","middleInitial":"S.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":false,"id":341409,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":5224291,"text":"5224291 - 2003 - Sexual selection affects local extinction and turnover in bird communities","interactions":[],"lastModifiedDate":"2022-03-16T17:14:10.049911","indexId":"5224291","displayToPublicDate":"2010-06-16T12:18:46","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3164,"text":"Proceedings of the National Academy of Sciences","active":true,"publicationSubtype":{"id":10}},"title":"Sexual selection affects local extinction and turnover in bird communities","docAbstract":"Predicting extinction risks has become a central goal for conservation and evolutionary biologists interested in population and community dynamics.  Several factors have been put forward to explain risks of extinction, including ecological and life history characteristics of individuals.  For instance, factors that affect the balance between natality and mortality can have profound effects on population persistence.  Sexual selection has been identified as one such factor.  Populations under strong sexual selection experience a number of costs ranging from increased predation and parasitism to enhanced sensitivity to environmental and demographic stochasticity.  These findings have led to the prediction that local extinction rates should be higher for species/populations with intense sexual selection.  We tested this prediction by analyzing the dynamics of natural bird communities at a continental scale over a period of 21 years (1975-1996), using relevant statistical tools.  In agreement with the theoretical prediction, we found that sexual selection increased risks of local extinction (dichromatic birds had on average a 23% higher local extinction rate than monochromatic species).  However, despite higher local extinction probabilities, the number of dichromatic species did not decrease over the period considered in this study.  This pattern was caused by higher local turnover rates of dichromatic species, resulting in relatively stable communities for both groups of species.  Our results suggest that these communities function as metacommunities, with frequent local extinctions followed by colonization.  Anthropogenic factors impeding dispersal might therefore have a significant impact on the global persistence of sexually selected species.","language":"English","publisher":"National Academy of Sciences","doi":"10.1073/pnas.0836953100","usgsCitation":"Doherty, P.F., Sorci, G., Royle, J., Hines, J., Nichols, J., and Boulinier, T., 2003, Sexual selection affects local extinction and turnover in bird communities: Proceedings of the National Academy of Sciences, v. 100, no. 10, p. 5858-5862, https://doi.org/10.1073/pnas.0836953100.","productDescription":"5 p.","startPage":"5858","endPage":"5862","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":478313,"rank":1,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://doi.org/10.1073/pnas.0836953100","text":"External Repository"},{"id":199443,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"100","issue":"10","noUsgsAuthors":false,"publicationDate":"2003-04-07","publicationStatus":"PW","scienceBaseUri":"4f4e4b06e4b07f02db69a46b","contributors":{"authors":[{"text":"Doherty, Paul F. Jr.","contributorId":37636,"corporation":false,"usgs":false,"family":"Doherty","given":"Paul","suffix":"Jr.","email":"","middleInitial":"F.","affiliations":[{"id":6621,"text":"Colorado State University","active":true,"usgs":false}],"preferred":false,"id":341180,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sorci, G.","contributorId":15728,"corporation":false,"usgs":true,"family":"Sorci","given":"G.","email":"","affiliations":[],"preferred":false,"id":341177,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"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":341181,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hines, J.E. 0000-0001-5478-7230","orcid":"https://orcid.org/0000-0001-5478-7230","contributorId":36885,"corporation":false,"usgs":true,"family":"Hines","given":"J.E.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":false,"id":341178,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Nichols, J.D. 0000-0002-7631-2890","orcid":"https://orcid.org/0000-0002-7631-2890","contributorId":14332,"corporation":false,"usgs":true,"family":"Nichols","given":"J.D.","affiliations":[],"preferred":false,"id":341176,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Boulinier, T.","contributorId":37845,"corporation":false,"usgs":true,"family":"Boulinier","given":"T.","email":"","affiliations":[],"preferred":false,"id":341179,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":5224273,"text":"5224273 - 2003 - On the use of the robust design with transient capture-recapture models","interactions":[],"lastModifiedDate":"2020-09-01T21:25:28.588446","indexId":"5224273","displayToPublicDate":"2010-06-16T12:18:45","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3544,"text":"The Auk","onlineIssn":"1938-4254","printIssn":"0004-8038","active":true,"publicationSubtype":{"id":10}},"title":"On the use of the robust design with transient capture-recapture models","docAbstract":"Capture-mark-recapture studies provide a useful mechanism for estimating the components of the population dynamics of birds, especially survival.  In such studies, it is important that the population being captured matches the population of interest. In many studies, transients are captured along with the population of interest (e.g. resident breeders).  Ignoring that phenomenon produces negatively biased survival estimates, because transients do not return. Although transients cannot be distinguished from residents in the hand, previous methods have adjusted for transience by relying on those captured in more than one year to provide direct estimates of survival rate for residents.  Here, we extend that approach by supplementing that cohort of known residents with those previously unmarked birds captured twice or more, at least d days apart, within a season.  We provide an ad hoc approach to that extension in detail and outline two more formal approaches.  That extension increases the precision of survival estimates.","language":"English","publisher":"American Ornithological Society","doi":"10.1093/auk/120.4.1151","usgsCitation":"Hines, J., Kendall, W., and Nichols, J., 2003, On the use of the robust design with transient capture-recapture models: The Auk, v. 120, no. 4, p. 1151-1158, https://doi.org/10.1093/auk/120.4.1151.","productDescription":"8 p.","startPage":"1151","endPage":"1158","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":478316,"rank":3,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1093/auk/120.4.1151","text":"Publisher Index Page"},{"id":202027,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":378071,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://academic.oup.com/auk/article/120/4/1151/5562231","linkFileType":{"id":5,"text":"html"}}],"volume":"120","issue":"4","noUsgsAuthors":false,"publicationDate":"2003-10-01","publicationStatus":"PW","scienceBaseUri":"4f4e4af3e4b07f02db691ade","contributors":{"authors":[{"text":"Hines, J.E. 0000-0001-5478-7230","orcid":"https://orcid.org/0000-0001-5478-7230","contributorId":36885,"corporation":false,"usgs":true,"family":"Hines","given":"J.E.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":false,"id":341115,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kendall, W. L. 0000-0003-0084-9891","orcid":"https://orcid.org/0000-0003-0084-9891","contributorId":32880,"corporation":false,"usgs":true,"family":"Kendall","given":"W. L.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":false,"id":341114,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nichols, J.D. 0000-0002-7631-2890","orcid":"https://orcid.org/0000-0002-7631-2890","contributorId":14332,"corporation":false,"usgs":true,"family":"Nichols","given":"J.D.","affiliations":[],"preferred":false,"id":341113,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":5224246,"text":"5224246 - 2003 - Local extinction and turnover rates at the edge and interior of species' ranges","interactions":[],"lastModifiedDate":"2012-02-02T00:15:30","indexId":"5224246","displayToPublicDate":"2010-06-16T12:18:44","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":783,"text":"Annales Zoologici Fennici","active":true,"publicationSubtype":{"id":10}},"title":"Local extinction and turnover rates at the edge and interior of species' ranges","docAbstract":"One hypothesis for the maintenance of the edge of a species' range suggests that more central (and abundant) populations are relatively stable and edge populations are less stable with increased local extinction and turnover rates.  To date, estimates of such metrics are equivocal due to design and analysis flaws.  Apparent increased estimates of extinction and turnover rates at the edge of range, versus the interior, could be a function of decreased detection probabilities alone, and not of a biological process.  We estimated extinction and turnover rates for species at the interiors and edges of their ranges using an approach which incorporates potential heterogeneity in species detection probabilities.  Extinction rates were higher at the edges (0.17 ' 0.03 [SE]) than in the interiors (0.04 ' 0.01), as was turnover.  Without taking the probability of detection into account these differences would be artificially magnified.  Knowledge of extinction and turnover rates is essential in furthering our understanding of range dynamics, and in directing conservation efforts.  This study further illustrates the practical application of methods proposed recently for estimating extinction rates and other community dynamic parameters.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Annales Zoologici Fennici","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","collaboration":"6060 Doherty.pdf","usgsCitation":"Doherty, P., Boulinier, T., and Nichols, J., 2003, Local extinction and turnover rates at the edge and interior of species' ranges: Annales Zoologici Fennici, v. 40, p. 145-153.","productDescription":"145-153","startPage":"145","endPage":"153","numberOfPages":"9","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":201784,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"40","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a68e4b07f02db63b1fa","contributors":{"authors":[{"text":"Doherty, P.F. Jr.","contributorId":74096,"corporation":false,"usgs":true,"family":"Doherty","given":"P.F.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":341029,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Boulinier, T.","contributorId":37845,"corporation":false,"usgs":true,"family":"Boulinier","given":"T.","email":"","affiliations":[],"preferred":false,"id":341028,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nichols, J.D. 0000-0002-7631-2890","orcid":"https://orcid.org/0000-0002-7631-2890","contributorId":14332,"corporation":false,"usgs":true,"family":"Nichols","given":"J.D.","affiliations":[],"preferred":false,"id":341027,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":5224256,"text":"5224256 - 2003 - In memoriam: Eugene Pleasants Odum, 1913-2002","interactions":[],"lastModifiedDate":"2020-09-01T20:15:51.517765","indexId":"5224256","displayToPublicDate":"2010-06-16T12:18:44","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3544,"text":"The Auk","onlineIssn":"1938-4254","printIssn":"0004-8038","active":true,"publicationSubtype":{"id":10}},"title":"In memoriam: Eugene Pleasants Odum, 1913-2002","docAbstract":"<p><span>Eugene Pleasants Odum, a Life Member of the AOU since 1932, an Elective Member since 1943, and a Fellow since 1951, died 10 August 2002 of an apparent heart attack while tending his garden. Gene was born in New Hampshire on 17 September 1913 and spent most of his childhood and college days in Chapel Hill, North Carolina. He developed a keen interest in birds and natural history during grade school, encouraged by his cousin, Dr. George Mayfield of the Tennessee Ornithological Society. At high school, Gene and his friend Coit Coker started a bird magazine and a newspaper column called “Bird Life in Chapel Hill.” Gene never tired of teaching and used every opportunity to inform people enthusiastically about birds and the environment. While at home on breaks from graduate school, he taught his younger brother Howard Thomas Odum (1924–2002), then in high school, much of the ecology that he learned from pioneers such as Victor E. Shelford and his major professor S. Charles Kendeigh. Howard, known as H.T. or Tom, described Gene as one of his five great teachers. Gene developed his holistic vision of science in part from the sociological teachings and interdisciplinary approaches of his father, sociologist Howard W. Odum.</span></p>","language":"English","publisher":"American Ornithological Society","doi":"10.1093/auk/120.2.536","usgsCitation":"Meyers, J., and Johnston, D., 2003, In memoriam: Eugene Pleasants Odum, 1913-2002: The Auk, v. 120, no. 2, p. 536-538, https://doi.org/10.1093/auk/120.2.536.","productDescription":"3 p.","startPage":"536","endPage":"538","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":478321,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1093/auk/120.2.536","text":"Publisher Index Page"},{"id":195963,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"120","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49fce4b07f02db5f5ba2","contributors":{"authors":[{"text":"Meyers, J.M.","contributorId":54307,"corporation":false,"usgs":true,"family":"Meyers","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":341064,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Johnston, D.W.","contributorId":36646,"corporation":false,"usgs":true,"family":"Johnston","given":"D.W.","email":"","affiliations":[],"preferred":false,"id":341063,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":5224251,"text":"5224251 - 2003 - Demographic stochasticity in small remnant populations of the declining distylous plant Primula veris","interactions":[],"lastModifiedDate":"2012-02-02T00:15:31","indexId":"5224251","displayToPublicDate":"2010-06-16T12:18:44","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":970,"text":"Basic and Applied Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Demographic stochasticity in small remnant populations of the declining distylous plant Primula veris","docAbstract":"We studied ecological consequences of distyly for the declining perennial plant Primula veris in the Swiss Jura.  Distyly favours cross-fertilization and avoids inbreeding, but may lead to pollen limitation and reduced reproduction if morph frequencies deviate from 50 %.  Disassortative mating is promoted by the reciprocal position of stigmas and anthers in the two morphs (pin and thrum) and by intramorph incompatibility and should result in equal frequencies of morphs at equilibrium.  However, deviations could arise because of demographic stochasticity, the lower intra-morph incompatibility of the pin morph, and niche differentiation between morphs.  Demographic stochasticity should result in symmetric deviations from an even morph frequency among populations and in increased deviations with decreasing population size.  If crosses between pins occurred, these would only generate pins, and this could result in a pin-bias of morph frequencies in general and in small populations in particular.  If the morphs have different niches, morph frequencies should be related to environmental factors, morphs might be spatially segregated, and morphological differences between morphs would be expected.  We tested these hypotheses in the declining distylous P. veris.  We studied morph frequencies in relation to environmental conditions and population size, spatial segregation in field populations, morphological differences between morphs, and growth responses to nutrient addition.  Morph frequencies in 76 populations with 1 - 80000 flowering plants fluctuated symmetrically about 50 %.  Deviations from 50 % were much larger in small populations, and sixof the smallest populations had lost one morph altogether.  In contrast, morph frequencies were neither related to population size nor to 17 measures of environmental conditions.  We found no spatial segregation or morphological differences in the field or in the common garden.  The results suggest that demographic stochasticity caused deviations of the morph ratiofrom unity in small populations.  Demographic stochasticity was probably caused by the random elimination of plants during the fragmentation of formerly large continuous populations.  Biased morph frequencies may be one of the reasons for the strongly reduced reproduction in small populations of P. veris.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Basic and Applied Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1078/1439-1791-00142","collaboration":"6068_Kery.pdf","usgsCitation":"Kery, M., Matthies, D., and Schmid, B., 2003, Demographic stochasticity in small remnant populations of the declining distylous plant Primula veris: Basic and Applied Ecology, v. 4, no. 3, p. 197-206, https://doi.org/10.1078/1439-1791-00142.","productDescription":"197-206","startPage":"197","endPage":"206","numberOfPages":"10","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":202134,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":17203,"rank":200,"type":{"id":11,"text":"Document"},"url":"https://dx.doi.org/10.1078/1439-1791-00142","linkFileType":{"id":5,"text":"html"}}],"volume":"4","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ab2e4b07f02db66ed24","contributors":{"authors":[{"text":"Kery, M.","contributorId":46637,"corporation":false,"usgs":true,"family":"Kery","given":"M.","affiliations":[],"preferred":false,"id":341041,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Matthies, D.","contributorId":48678,"corporation":false,"usgs":true,"family":"Matthies","given":"D.","email":"","affiliations":[],"preferred":false,"id":341042,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Schmid, B.","contributorId":21121,"corporation":false,"usgs":true,"family":"Schmid","given":"B.","email":"","affiliations":[],"preferred":false,"id":341040,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":5224253,"text":"5224253 - 2003 - Lead accumulation in feathers of nestling black-crowned night-herons (Nycticorax nycticorax) experimentally treated in the field","interactions":[],"lastModifiedDate":"2012-02-02T00:15:11","indexId":"5224253","displayToPublicDate":"2010-06-16T12:18:44","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1571,"text":"Environmental Toxicology and Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"Lead accumulation in feathers of nestling black-crowned night-herons (Nycticorax nycticorax) experimentally treated in the field","docAbstract":"Although lead can attain high concentrations in feathers, interpretation of the biological significance of this phenomenon is difficult.  As part of an effort to develop and validate non-invasive methods to monitor contaminant exposure in free-ranging birds, lead uptake by feathers of nestling black-crowned night-herons (Nycticorax nycticorax) was evaluated in a controlled exposure study.  Four to six day-old heron nestlings (one/nest) at Chincoteague Bay, Virginia, received a single intraperitoneal injection of dosing vehicle (control; n=7) or a dose of lead nitrate in water (0.01, 0.05, or 0.25 mg Pb/g body weight of nestling; n=6 or 7/dose) chosen to yield feather lead concentrations found at low to moderately polluted sites.  Nestlings were euthanized at 15 days of age.  Lead accumulation in feathers was associated with concentrations in bone, kidney, and liver (r = 0.32 - 0.74, p < 0.02), but exhibited only modest dose-dependence.  Blood delta-aminolevulinic acid dehydratase activity was inhibited by lead, although effects on other biochemical endpoints were marginal.  Tarsus growth rate was inversely related to feather lead concentration. Culmen growth rate was depressed in nestlings treated with the highest dose of lead, but not correlated with feather lead concentration.  These findings provide evidence that feathers of nestling herons are a sensitive indicator of lead exposure and have potential application for the extrapolation of lead concentrations in other tissues and the estimation of environmental lead exposure in birds.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Toxicology and Chemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","collaboration":"6073_Golden.pdf","usgsCitation":"Golden, N.H., Rattner, B., Cohen, J., Hoffman, D.J., Russek-Cohen, E., and Ottinger, M.A., 2003, Lead accumulation in feathers of nestling black-crowned night-herons (Nycticorax nycticorax) experimentally treated in the field: Environmental Toxicology and Chemistry, v. 22, no. 7, p. 1517-1524.","productDescription":"1517-1524","startPage":"1517","endPage":"1524","numberOfPages":"8","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":195961,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":17205,"rank":200,"type":{"id":11,"text":"Document"},"url":"https://www3.interscience.wiley.com/journal/122678567/abstract","linkFileType":{"id":5,"text":"html"}}],"volume":"22","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b1be4b07f02db6a8920","contributors":{"authors":[{"text":"Golden, N. H.","contributorId":55541,"corporation":false,"usgs":true,"family":"Golden","given":"N.","email":"","middleInitial":"H.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":false,"id":341051,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rattner, Barnett A. 0000-0003-3676-2843","orcid":"https://orcid.org/0000-0003-3676-2843","contributorId":95843,"corporation":false,"usgs":true,"family":"Rattner","given":"Barnett A.","affiliations":[{"id":50464,"text":"Eastern Ecological Science Center","active":true,"usgs":true}],"preferred":true,"id":341052,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Cohen, J.B.","contributorId":29914,"corporation":false,"usgs":true,"family":"Cohen","given":"J.B.","email":"","affiliations":[],"preferred":false,"id":341050,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hoffman, D. J.","contributorId":12801,"corporation":false,"usgs":true,"family":"Hoffman","given":"D.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":341049,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Russek-Cohen, E.","contributorId":11717,"corporation":false,"usgs":true,"family":"Russek-Cohen","given":"E.","email":"","affiliations":[],"preferred":false,"id":341048,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Ottinger, M. A.","contributorId":99078,"corporation":false,"usgs":true,"family":"Ottinger","given":"M.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":341053,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":5224266,"text":"5224266 - 2003 - Population increase in Kirtland's warbler and summer range expansion to Wisconsin and Michigan's Upper Peninsula, USA","interactions":[],"lastModifiedDate":"2021-08-22T18:10:51.718534","indexId":"5224266","displayToPublicDate":"2010-06-16T12:18:44","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2968,"text":"Oryx","active":true,"publicationSubtype":{"id":10}},"title":"Population increase in Kirtland's warbler and summer range expansion to Wisconsin and Michigan's Upper Peninsula, USA","docAbstract":"<p><span>The threatened Kirtland's warbler&nbsp;</span><span class=\"italic\">Dendroica kirtlandii</span><span>&nbsp;breeds in stands of young jack pine&nbsp;</span><span class=\"italic\">Pinus banksiana</span><span>&nbsp;growing on well-drained soils in Michigan, USA. We summarize information documenting the range expansion of Kirtland's warbler due to increased habitat management in the core breeding range in the Lower Peninsula of Michigan during 1990–2000. We collected records and conducted searches for the species in Michigan's Upper Peninsula and Wisconsin over 1978–2000. During that time 25 males were found in Wisconsin and 90 males in the Upper Peninsula. We documented colonization of Michigan's Upper Peninsula by six ringed males from the Lower Peninsula of Michigan. Four ringed birds also moved back to the core breeding range, including two males that made two-way movements between the core breeding range and the Upper Peninsula. Thirty-seven females were observed with males from 1995 to 2000, all in Michigan. Nesting activities were noted for 25 pairs and at least nine nests fledged young. One male ringed as a fledgling returned to breed in two subsequent years. After a 19-year period of population stability, the Kirtland's warbler population increased four-fold during 1990–2000, most likely in response to a tripling in habitat area. This increase in sightings and documented breeding may be related to habitat availability in Michigan's Upper Peninsula and to saturation of habitat in the main breeding range. The increase in extra-limital records during 1995–1999 corresponds to the time when the population went from the minimum to the maximum projected population densities, and a decline in natural wildfire habitat was just offset by new managed habitat for the Kirtland's warbler.</span></p>","language":"English","publisher":"Cambridge University Press","doi":"10.1017/S0030605303000632","usgsCitation":"Probst, J., Donner, D., Bocetti, C.I., and Sjogren, S., 2003, Population increase in Kirtland's warbler and summer range expansion to Wisconsin and Michigan's Upper Peninsula, USA: Oryx, v. 37, no. 3, p. 365-373, https://doi.org/10.1017/S0030605303000632.","productDescription":"9 p.","startPage":"365","endPage":"373","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":478318,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1017/s0030605303000632","text":"Publisher Index Page"},{"id":388324,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United  States","state":"Michigan, Wisconsin","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -91.69189453125,\n              44.08758502824516\n            ],\n            [\n              -88.24218749999999,\n              44.308126684886126\n            ],\n            [\n              -87.451171875,\n              44.24519901522129\n            ],\n            [\n              -86.33056640625,\n              43.8028187190472\n            ],\n            [\n              -83.583984375,\n              43.54854811091286\n            ],\n            [\n              -83.1005859375,\n              44.933696389694674\n            ],\n            [\n              -83.47412109375,\n              45.81348649679973\n            ],\n            [\n              -83.47412109375,\n              46.042735653846506\n            ],\n            [\n              -84.08935546875,\n              46.45299704748289\n            ],\n            [\n              -85.078125,\n              46.7549166192819\n            ],\n            [\n              -87.802734375,\n              47.487513008956554\n            ],\n            [\n              -91.0546875,\n              46.9502622421856\n            ],\n            [\n              -92.17529296875,\n              46.63435070293566\n            ],\n            [\n              -92.3291015625,\n              46.027481852486645\n            ],\n            [\n              -92.83447265624999,\n              45.874712248904764\n            ],\n            [\n              -92.83447265624999,\n              45.583289756006316\n            ],\n            [\n              -92.74658203125,\n              44.77793589631623\n            ],\n            [\n              -91.69189453125,\n              44.08758502824516\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"37","issue":"3","noUsgsAuthors":false,"publicationDate":"2003-09-02","publicationStatus":"PW","scienceBaseUri":"4f4e4b14e4b07f02db6a47ee","contributors":{"authors":[{"text":"Probst, J.R.","contributorId":102983,"corporation":false,"usgs":true,"family":"Probst","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":341100,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Donner, D.M.","contributorId":14088,"corporation":false,"usgs":true,"family":"Donner","given":"D.M.","email":"","affiliations":[],"preferred":false,"id":341097,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bocetti, Carol I.","contributorId":60343,"corporation":false,"usgs":true,"family":"Bocetti","given":"Carol","email":"","middleInitial":"I.","affiliations":[],"preferred":false,"id":341099,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Sjogren, S.","contributorId":20451,"corporation":false,"usgs":true,"family":"Sjogren","given":"S.","email":"","affiliations":[],"preferred":false,"id":341098,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":5224263,"text":"5224263 - 2003 - Agricultural landscapes: Can they support healthy bird populations as well as farm products?","interactions":[],"lastModifiedDate":"2020-09-01T20:14:44.427489","indexId":"5224263","displayToPublicDate":"2010-06-16T12:18:44","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3544,"text":"The Auk","onlineIssn":"1938-4254","printIssn":"0004-8038","active":true,"publicationSubtype":{"id":10}},"title":"Agricultural landscapes: Can they support healthy bird populations as well as farm products?","docAbstract":"<p>At the beginning of the twentieth century, prospects for bird populations occupying farmlands were promising. Agricultural expansion and the resulting deforestation produced wholesale changes to the landscape of eastern North America (Trautman 1977, Zeranski and Baptist 1990, Nicholson 1997). Regional avifaunas were transformed as Horned Larks (<i>Eremophila alpestris</i>), Dickcissels (Spiza americana), and other farmland birds undertook range expansions (Hurley and Franks 1976, Askins 1999). Those farmland birds became conspicuous, frequently in numbers that are hard to imagine today (Trautman 1940).</p><p>One hundred years later, many of those once plentiful species experienced dramatic population declines (Askins 1993, Peterjohn and Sauer 1999). Those trends were evident for many decades, although pre-1965 trends were largely based on anecdotal accounts and were frequently attributed to changing regional landscapes due to urban expansion, farm abandonment resulting in increased forest cover, and the more intensive use of remaining agricultural fields (Trautman 1940, Herkert 1991, Askins 2000). However, numerous specific factors were implicated in local declines of individual species (Kantrud 1981, Bollinger et al. 1990, Lymn and Temple 1991, Bowen and Kruse 1993, Herkert 1994, Houston and Schmutz 1999, Blackwell and Dolbeer 2001).</p><p>Understanding factors responsible for population changes can be approached at various geographic scales. Local studies identify specific factors influencing small populations, but the applicability of those results across broad geographic areas is often uncertain. Studies conducted at large geographic scales identify broad patterns of change, but those patterns frequently involve interrelated factors that may be only loosely related to the actual causes of population change. However, correlations between broad patterns of changes in bird populations and land-use characteristics provide a basis for directing future studies conducted at smaller geographic scales.</p>","language":"English","publisher":"American Ornithological Society","doi":"10.1093/auk/120.1.14","usgsCitation":"Peterjohn, B., 2003, Agricultural landscapes: Can they support healthy bird populations as well as farm products?: The Auk, v. 120, no. 1, p. 14-19, https://doi.org/10.1093/auk/120.1.14.","productDescription":"6 p.","startPage":"14","endPage":"19","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":478320,"rank":3,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"http://doi.org/10.1093/auk/120.1.14","text":"Publisher Index Page"},{"id":196304,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":378074,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://academic.oup.com/auk/article/120/1/14/5561986","linkFileType":{"id":5,"text":"html"}}],"volume":"120","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ae3e4b07f02db6890a5","contributors":{"authors":[{"text":"Peterjohn, B.G.","contributorId":25255,"corporation":false,"usgs":true,"family":"Peterjohn","given":"B.G.","email":"","affiliations":[],"preferred":false,"id":341086,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":5224243,"text":"5224243 - 2003 - Adjusting multistate capture-recapture models for misclassification bias: manatee breeding proportions","interactions":[],"lastModifiedDate":"2012-02-02T00:15:29","indexId":"5224243","displayToPublicDate":"2010-06-16T12:18:42","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1465,"text":"Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Adjusting multistate capture-recapture models for misclassification bias: manatee breeding proportions","docAbstract":"Matrix population models are important tools for research and management of populations.  Estimating the parameters of these models is an important step in applying them to real populations.  Multistate capture-recapture methods have provided a useful means for estimating survival and parameters of transition between locations or life history states but have mostly relied on the assumption that the state occupied by each detected animal is known with certainty.  Nevertheless, in some cases animals can be misclassified.  Using multiple capture sessions within each period of interest, we developed a method that adjusts estimates of transition probabilities for bias due to misclassification.  We applied this method to 10 years of sighting data for a population of Florida manatees (Trichechus manatus latirostris) in order to estimate the annual probability of transition from nonbreeding to breeding status.  Some sighted females were unequivocally classified as breeders because they were clearly accompanied by a first-year calf.  The remainder were classified, sometimes erroneously, as nonbreeders because an attendant first-year calf was not observed or was classified as more than one year old.  We estimated a conditional breeding probability of 0.31 + 0.04 (estimate + 1 SE) when we ignored misclassification bias, and 0.61 + 0.09 when we accounted for misclassification.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","collaboration":"6053 Kendall.pdf","usgsCitation":"Kendall, W., Hines, J., and Nichols, J., 2003, Adjusting multistate capture-recapture models for misclassification bias: manatee breeding proportions: Ecology, v. 84, no. 4, p. 1058-1066.","productDescription":"1058-1066","startPage":"1058","endPage":"1066","numberOfPages":"9","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":202320,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":17148,"rank":200,"type":{"id":11,"text":"Document"},"url":"https://www.esajournals.org/doi/abs/10.1890/0012-9658(2003)084%5B1058%3AAMCMFM%5D2.0.CO%3B2","linkFileType":{"id":5,"text":"html"}}],"volume":"84","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b03e4b07f02db698eab","contributors":{"authors":[{"text":"Kendall, W. L. 0000-0003-0084-9891","orcid":"https://orcid.org/0000-0003-0084-9891","contributorId":32880,"corporation":false,"usgs":true,"family":"Kendall","given":"W. L.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":false,"id":341018,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hines, J.E. 0000-0001-5478-7230","orcid":"https://orcid.org/0000-0001-5478-7230","contributorId":36885,"corporation":false,"usgs":true,"family":"Hines","given":"J.E.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":false,"id":341019,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nichols, J.D. 0000-0002-7631-2890","orcid":"https://orcid.org/0000-0002-7631-2890","contributorId":14332,"corporation":false,"usgs":true,"family":"Nichols","given":"J.D.","affiliations":[],"preferred":false,"id":341017,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":5224234,"text":"5224234 - 2003 - Effects of life-state on detectability in a demographic study of the terrestrial orchid Cleistes bifaria","interactions":[],"lastModifiedDate":"2021-08-08T18:42:08.756109","indexId":"5224234","displayToPublicDate":"2010-06-16T12:18:42","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2242,"text":"Journal of Ecology","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Effects of life-state on detectability in a demographic study of the terrestrial orchid <i>Cleistes bifaria</i>","title":"Effects of life-state on detectability in a demographic study of the terrestrial orchid Cleistes bifaria","docAbstract":"<p><span>1. Most plant&nbsp;</span>demographic<span>&nbsp;studies follow marked individuals&nbsp;</span>in<span>&nbsp;permanent plots. Plots tend to be small, so&nbsp;</span>detectability<span>&nbsp;is assumed to be one for every individual. However,&nbsp;</span>detectability<span>&nbsp;could be affected by factors such as plant traits, time, space, observer, previous detection, biotic interactions, and especially by&nbsp;</span>life<span>-</span>state<span>. 2. We used&nbsp;</span>a<span>&nbsp;double-observer survey and closed population capture-recapture modelling to estimate&nbsp;</span>state<span>-specific&nbsp;</span>detectability<span>&nbsp;of the&nbsp;</span>orchid<span>&nbsp;</span>Cleistes<span>&nbsp;</span>bifaria<span>&nbsp;</span>in<span>&nbsp;</span>a<span>&nbsp;long-term&nbsp;</span>study<span>&nbsp;plot of 41.2 m</span><sup>2</sup><span>. Based on AIC</span><sub>c</sub><span>&nbsp;model selection,&nbsp;</span>detectability<span>&nbsp;was different for each&nbsp;</span>life<span>-</span>state<span>&nbsp;and for tagged vs. previously untagged plants. There were no differences&nbsp;</span>in<span>&nbsp;</span>detectability<span>&nbsp;between the two observers. 3.&nbsp;</span>Detectability<span>&nbsp;estimates (SE) for one-leaf vegetative, two-leaf vegetative, and flowering/fruiting states correlated with mean size of these states and were 0.76 (0.05), 0.92 (0.06), and 1 (0.00), respectively, for previously tagged plants, and 0.84 (0.08), 0.75 (0.22), and 0 (0.00), respectively, for previously untagged plants. (We had insufficient data to obtain&nbsp;</span>a<span>&nbsp;satisfactory estimate of previously untagged flowering plants). 4. Our estimates are for&nbsp;</span>a<span>&nbsp;medium-sized plant&nbsp;</span>in<span>&nbsp;</span>a<span>&nbsp;small and intensively surveyed plot. It is possible that&nbsp;</span>detectability<span>&nbsp;is even lower for larger plots and smaller plants or smaller&nbsp;</span>life<span>-states (e.g. seedlings) and that detectabilities &lt; I are widespread&nbsp;</span>in<span>&nbsp;plant&nbsp;</span>demographic<span>&nbsp;studies. 5.&nbsp;</span>State<span>-dependent detectabilities are especially worrying since they will lead to&nbsp;</span>a<span>&nbsp;size- or&nbsp;</span>state<span>-biased sample from the&nbsp;</span>study<span>&nbsp;plot. Failure to incorporate&nbsp;</span>detectability<span>&nbsp;into&nbsp;</span>demographic<span>&nbsp;estimation methods introduces&nbsp;</span>a<span>&nbsp;bias into most estimates of population parameters such as fecundity, recruitment, mortality, and transition rates between&nbsp;</span>life<span>-states. We illustrate this by&nbsp;</span>a<span>&nbsp;simple example using&nbsp;</span>a<span>&nbsp;matrix model, where&nbsp;</span>a<span>&nbsp;hypothetical population was stable but, due to imperfect detection, wrongly projected to be declining at&nbsp;</span>a<span>&nbsp;rate of 8% per year. 6. Almost all plant&nbsp;</span>demographic<span>&nbsp;studies are based on models for discrete states.&nbsp;</span>State<span>&nbsp;and size are important predictors both for&nbsp;</span>demographic<span>&nbsp;rates and&nbsp;</span>detectability<span>. We suggest that even&nbsp;</span>in<span>&nbsp;studies based on small plots,&nbsp;</span>state<span>- or size-specific&nbsp;</span>detectability<span>&nbsp;should be estimated at least at some point to avoid biased inference about the dynamics of the population sampled.</span></p>","language":"English","publisher":"British Ecological Society","doi":"10.1046/j.1365-2745.2003.00759.x","usgsCitation":"Kery, M., and Gregg, K., 2003, Effects of life-state on detectability in a demographic study of the terrestrial orchid Cleistes bifaria: Journal of Ecology, v. 91, no. 2, p. 265-273, https://doi.org/10.1046/j.1365-2745.2003.00759.x.","productDescription":"9 p.","startPage":"265","endPage":"273","numberOfPages":"9","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":478324,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1046/j.1365-2745.2003.00759.x","text":"Publisher Index Page"},{"id":387751,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"91","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a29e4b07f02db611cb4","contributors":{"authors":[{"text":"Kery, M.","contributorId":46637,"corporation":false,"usgs":true,"family":"Kery","given":"M.","affiliations":[],"preferred":false,"id":340991,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gregg, K.B.","contributorId":34224,"corporation":false,"usgs":true,"family":"Gregg","given":"K.B.","email":"","affiliations":[],"preferred":false,"id":340990,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":5224229,"text":"5224229 - 2003 - Estimating abundance from repeated presence-absence data or point counts","interactions":[],"lastModifiedDate":"2012-02-02T00:15:07","indexId":"5224229","displayToPublicDate":"2010-06-16T12:18:41","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1465,"text":"Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Estimating abundance from repeated presence-absence data or point counts","docAbstract":"We describe an approach for estimating occupancy rate or the proportion of area occupied when heterogeneity in detection probability exists as a result of variation in abundance of the organism under study.  The key feature of such problems, which we exploit, is that variation in abundance induces variation in detection probability.  Thus, heterogeneity in abundance can be modeled as heterogeneity in detection probability.  Moreover, this linkage between heterogeneity in abundance and heterogeneity in detection probability allows one to exploit a heterogeneous detection probability model to estimate the underlying distribution of abundances.  Therefore, our method allows estimation of abundance from repeated observations of the presence or absence of animals without having to uniquely mark individuals in the population.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","collaboration":"6027_Royle.pdf","usgsCitation":"Royle, J., and Nichols, J., 2003, Estimating abundance from repeated presence-absence data or point counts: Ecology, v. 84, no. 3, p. 777-790.","productDescription":"777-790","startPage":"777","endPage":"790","numberOfPages":"14","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":197820,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":17139,"rank":200,"type":{"id":11,"text":"Document"},"url":"https://www.esajournals.org/doi/abs/10.1890/0012-9658(2003)084%5B0777%3AEAFRPA%5D2.0.CO%3B2","linkFileType":{"id":5,"text":"html"}}],"volume":"84","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a0ce4b07f02db5fc99d","contributors":{"authors":[{"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":340972,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Nichols, J.D. 0000-0002-7631-2890","orcid":"https://orcid.org/0000-0002-7631-2890","contributorId":14332,"corporation":false,"usgs":true,"family":"Nichols","given":"J.D.","affiliations":[],"preferred":false,"id":340971,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":5224288,"text":"5224288 - 2003 - The type specimen of Anoura geoffroyi lasiopyga (Chiroptera: Phyllostomidae)","interactions":[],"lastModifiedDate":"2012-02-02T00:15:10","indexId":"5224288","displayToPublicDate":"2010-06-16T12:18:36","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3147,"text":"Proceedings of the Biological Society of Washington","active":true,"publicationSubtype":{"id":10}},"title":"The type specimen of Anoura geoffroyi lasiopyga (Chiroptera: Phyllostomidae)","docAbstract":"In 1868, Wilhelm Peters described Glossonycteris lasiopyga, based on a specimen provided by Henri de Saussure and collected in Mexico.  The type specimen was presumed to be among those housed in the collections of the Zoologisches Museum of the Humboldt Universitat in Berlin, Germany.  Our study of one of Saussure?s specimens from Mexico, discovered in the collections of the Museum d?Histoire Naturelle, Geneva, Switzerland, demonstrates that it and not one of the Berlin specimens is the holotype.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Proceedings of the Biological Society of Washington","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Arroyo-Cabrales, J., and Gardner, A.L., 2003, The type specimen of Anoura geoffroyi lasiopyga (Chiroptera: Phyllostomidae): Proceedings of the Biological Society of Washington, v. 116, no. 3, p. 737-741.","productDescription":"737-741","startPage":"737","endPage":"741","numberOfPages":"5","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":196205,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"116","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b15e4b07f02db6a4fa3","contributors":{"authors":[{"text":"Arroyo-Cabrales, Joaquin","contributorId":99248,"corporation":false,"usgs":true,"family":"Arroyo-Cabrales","given":"Joaquin","affiliations":[],"preferred":false,"id":341168,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gardner, A. L.","contributorId":97213,"corporation":false,"usgs":true,"family":"Gardner","given":"A.","middleInitial":"L.","affiliations":[],"preferred":false,"id":341167,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":52893,"text":"wri034133 - 2003 - Diffusion and drive-point sampling to detect ordnance-related compounds in shallow ground water beneath Snake Pond, Cape Cod, Massachusetts, 2001-02","interactions":[],"lastModifiedDate":"2020-02-09T17:46:08","indexId":"wri034133","displayToPublicDate":"2003-12-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":342,"text":"Water-Resources Investigations Report","code":"WRI","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"2003-4133","title":"Diffusion and drive-point sampling to detect ordnance-related compounds in shallow ground water beneath Snake Pond, Cape Cod, Massachusetts, 2001-02","docAbstract":"Diffusion samplers and temporary drive points were used to test for ordnance-related compounds in ground water discharging to Snake Pond near Camp Edwards at the Massachusetts Military Reservation, Cape Cod, MA. The contamination resulted from artillery use and weapons testing at various ranges upgradient of the pond.The diffusion samplers were constructed with a high-grade cellulose membrane that allowed diffusion of explosive compounds, such as RDX (Hexahydro-1,3,5-trinitro-1,3,5-triazine) and HMX (Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine), into deionized water inside the samplers. Laboratory tests confirmed that the cellulose membrane was permeable to RDX and HMX. One transect of 22 diffusion samplers was installed and retrieved in August-September 2001, and 12 transects with a total of 108 samplers were installed and retrieved in September-October 2001.  \r\n\r\nThe diffusion samplers were buried about 0.5 feet into the pond-bottom sediments by scuba divers and allowed to equilibrate with the ground water beneath the pond bottom for 13 to 27 days before retrieval. Water samples were collected from temporary well points driven about 2-4 feet into the pond bottom at 21 sites in December 2001 and March 2002 for analysis of explosives and perchlorate to confirm the diffusion-sampling results. \r\n\r\nThe water samples from the diffusion samplers exhibited numerous chromatographic peaks, but evaluation of the photo-diode-array spectra indicated that most of the peaks did not represent the target compounds. The peaks probably are associated with natural organic compounds present in the soft, organically enriched pond-bottom sediments. The presence of four explosive compounds at five widely spaced sites was confirmed by the photo-diode-array analysis, but the compounds are not generally found in contaminated ground water near the ranges. No explosives were detected in water samples obtained from the drive points. Perchlorate was detected at less than 1 microgram per liter in two drive-point samples collected at the same site on two dates about 3 months apart. The source of the perchlorate in the samples could not be related directly to other contamination from Camp Edwards with the available information. \r\n\r\nThe results from the diffusion and drive-point sampling do not indicate an area of ground-water discharge with concentrations of the ordnance-related compounds that are sufficiently elevated to be detected by these sampling methods. The diffusion and drive-point sampling data cannot be interpreted further without additional information concerning the pattern of ground-water flow at Snake Pond and the distributions of RDX, HMX, and perchlorate in ground water in the aquifer near the pond.","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/wri034133","usgsCitation":"LeBlanc, D.R., 2003, Diffusion and drive-point sampling to detect ordnance-related compounds in shallow ground water beneath Snake Pond, Cape Cod, Massachusetts, 2001-02: U.S. Geological Survey Water-Resources Investigations Report 2003-4133, 25 p., https://doi.org/10.3133/wri034133.","productDescription":"25 p.","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":4957,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.water.usgs.gov/wri034133/","linkFileType":{"id":5,"text":"html"}},{"id":177139,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"country":"United States","state":"Massachusetts ","otherGeospatial":"Cape Cod","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -70.7958984375,\n              41.582579601430346\n            ],\n            [\n              -69.85107421874999,\n              41.582579601430346\n            ],\n            [\n              -69.85107421874999,\n              42.21224516288584\n            ],\n            [\n              -70.7958984375,\n              42.21224516288584\n            ],\n            [\n              -70.7958984375,\n              41.582579601430346\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a9ae4b07f02db65d69f","contributors":{"authors":[{"text":"LeBlanc, Denis R. 0000-0002-4646-2628 dleblanc@usgs.gov","orcid":"https://orcid.org/0000-0002-4646-2628","contributorId":1696,"corporation":false,"usgs":true,"family":"LeBlanc","given":"Denis","email":"dleblanc@usgs.gov","middleInitial":"R.","affiliations":[{"id":466,"text":"New England Water Science Center","active":true,"usgs":true}],"preferred":true,"id":246159,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70185658,"text":"70185658 - 2003 - Microbial mercury cycling in sediments of the San Francisco Bay-Delta","interactions":[],"lastModifiedDate":"2017-03-27T11:25:07","indexId":"70185658","displayToPublicDate":"2003-12-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1583,"text":"Estuaries","active":true,"publicationSubtype":{"id":10}},"title":"Microbial mercury cycling in sediments of the San Francisco Bay-Delta","docAbstract":"<p><span>Microbial mercury (Hg) methylation and methylmercury (MeHg) degradation processes were examined using radiolabled model Hg compounds in San Francisco Bay-Delta surface sediments during three seasonal periods: late winter, spring, and fall. Strong seasonal and spatial differences were evident for both processes. MeHg production rates were positively correlated with microbial sulfate reduction rates during late winter only. MeHg production potential was also greatest during this period and decreased during spring and fall. This temporal trend was related both to an increase in gross MeHg degradation, driven by increasing temperature, and to a build-up in pore water sulfide and solid phase reduced sulfur driven by increased sulfate reduction during the warmer seasons. MeHg production decreased sharply with depth at two of three sites, both of which exhibited a corresponding increase in reduced sulfur compounds with depth. One site that was comparatively oxidized and alkaline exhibited little propensity for net MeHg production. These results support the hypothesis that net MeHg production is greatest when and where gross MeHg degradation rates are low and dissolved and solid phase reduced sulfur concentrations are low.</span></p>","language":"English","publisher":"Estuarine Research Federation","doi":"10.1007/BF02803660","usgsCitation":"Marvin-DiPasquale, M., and Agee, J.L., 2003, Microbial mercury cycling in sediments of the San Francisco Bay-Delta: Estuaries, v. 26, no. 6, p. 1517-1528, https://doi.org/10.1007/BF02803660.","productDescription":"12 p. ","startPage":"1517","endPage":"1528","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":338362,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"San Francisco Bay-Delta","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -121.90155029296875,\n              37.77505678240509\n            ],\n            [\n              -121.26983642578124,\n              37.77505678240509\n            ],\n            [\n              -121.26983642578124,\n              38.34165619279595\n            ],\n            [\n              -121.90155029296875,\n              38.34165619279595\n            ],\n            [\n              -121.90155029296875,\n              37.77505678240509\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"26","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58da251be4b0543bf7fda80a","contributors":{"authors":[{"text":"Marvin-DiPasquale, Mark 0000-0002-8186-9167 mmarvin@usgs.gov","orcid":"https://orcid.org/0000-0002-8186-9167","contributorId":149175,"corporation":false,"usgs":true,"family":"Marvin-DiPasquale","given":"Mark","email":"mmarvin@usgs.gov","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":686258,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Agee, Jennifer L. 0000-0002-5964-5079 jlagee@usgs.gov","orcid":"https://orcid.org/0000-0002-5964-5079","contributorId":2586,"corporation":false,"usgs":true,"family":"Agee","given":"Jennifer","email":"jlagee@usgs.gov","middleInitial":"L.","affiliations":[{"id":37464,"text":"WMA - Laboratory & Analytical Services Division","active":true,"usgs":true},{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":686259,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
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