{"pageNumber":"978","pageRowStart":"24425","pageSize":"25","recordCount":68937,"records":[{"id":70033021,"text":"70033021 - 2007 - Multibeam observations of mine burial near Clearwater, FL, including comparisons to predictions of wave-induced burial","interactions":[],"lastModifiedDate":"2012-03-12T17:21:38","indexId":"70033021","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1941,"text":"IEEE Journal of Oceanic Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Multibeam observations of mine burial near Clearwater, FL, including comparisons to predictions of wave-induced burial","docAbstract":"A Kongsberg Simrad EM 3000 multibeam sonar (Kongsberg Simrad, Kongsberg, Norway) was used to conduct a set of six repeat high-resolution bathymetric surveys west of Indian Rocks Beach (IRB), just to the south of Clearwater, FL, between January and March 2003, to observe in situ scour and burial of instrumented inert mines and mine-like cylinders. Three closely located study sites were chosen: two fine-sand sites, a shallow one located in ??? 13 m of water depth and a deep site located in ???14 m of water depth; and a coarse-sand site in ???13 m. Results from these surveys indicate that mines deployed in fine sand are nearly buried within two months of deployment (i.e., they sunk 74.5% or more below the ambient seafloor depth). Mines deployed in coarse sand showed a lesser amount of scour, burying until they present roughly the same hydrodynamic roughness as the surrounding rippled bedforms. These data were also used to test the validity of the Virginia Institute of Marine Science (VIMS, Gloucester Point, VA) 2-D burial model. The model worked well in areas of fine sand, sufficiently predicting burial over the course of the experiment. In the area of coarse sand, the model greatly overpredicted the amount of burial. This is believed to be due to the presence of rippled bedforms around the mines, which affect local bottom morphodynamics and are not accounted for in the model, an issue currently being addressed by the modelers. This paper focuses specifically on two instrumented mines: an acoustic mine located in fine sand and an optical instrumented mine located in coarse sand. ?? 2007 IEEE.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"IEEE Journal of Oceanic Engineering","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1109/JOE.2006.889317","issn":"03649059","usgsCitation":"Wolfson, M., Naar, D., Howd, P., Locker, S., Donahue, B., Friedrichs, C.T., Trembanis, A., Richardson, M.D., and Wever, T., 2007, Multibeam observations of mine burial near Clearwater, FL, including comparisons to predictions of wave-induced burial: IEEE Journal of Oceanic Engineering, v. 32, no. 1, p. 103-118, https://doi.org/10.1109/JOE.2006.889317.","startPage":"103","endPage":"118","numberOfPages":"16","costCenters":[],"links":[{"id":213209,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1109/JOE.2006.889317"},{"id":240813,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"32","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5fd5e4b0c8380cd71176","contributors":{"authors":[{"text":"Wolfson, M.L.","contributorId":41657,"corporation":false,"usgs":true,"family":"Wolfson","given":"M.L.","email":"","affiliations":[],"preferred":false,"id":439000,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Naar, D. F.","contributorId":80434,"corporation":false,"usgs":true,"family":"Naar","given":"D. F.","affiliations":[],"preferred":false,"id":439003,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Howd, P.A.","contributorId":103793,"corporation":false,"usgs":true,"family":"Howd","given":"P.A.","email":"","affiliations":[],"preferred":false,"id":439006,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Locker, S. D.","contributorId":81532,"corporation":false,"usgs":true,"family":"Locker","given":"S. D.","affiliations":[],"preferred":false,"id":439004,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Donahue, B.T.","contributorId":12529,"corporation":false,"usgs":true,"family":"Donahue","given":"B.T.","email":"","affiliations":[],"preferred":false,"id":438999,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Friedrichs, Carl T.","contributorId":43989,"corporation":false,"usgs":false,"family":"Friedrichs","given":"Carl","email":"","middleInitial":"T.","affiliations":[{"id":6708,"text":"Virginia Institute of Marine Science","active":true,"usgs":false}],"preferred":false,"id":439001,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Trembanis, A.C.","contributorId":49611,"corporation":false,"usgs":true,"family":"Trembanis","given":"A.C.","affiliations":[],"preferred":false,"id":439002,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Richardson, M. D.","contributorId":88094,"corporation":false,"usgs":true,"family":"Richardson","given":"M.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":439005,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Wever, T.F.","contributorId":107104,"corporation":false,"usgs":true,"family":"Wever","given":"T.F.","email":"","affiliations":[],"preferred":false,"id":439007,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}}
,{"id":70031358,"text":"70031358 - 2007 - A cold phase of the East Pacific triggers new phytoplankton blooms in San Francisco Bay","interactions":[],"lastModifiedDate":"2018-10-17T08:35:32","indexId":"70031358","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3165,"text":"Proceedings of the National Academy of Sciences of the United States of America","active":true,"publicationSubtype":{"id":10}},"title":"A cold phase of the East Pacific triggers new phytoplankton blooms in San Francisco Bay","docAbstract":"<p>Ecological observations sustained over decades often reveal abrupt changes in biological communities that signal altered ecosystem states. We report a large shift in the biological communities of San Francisco Bay, first detected as increasing phytoplankton biomass and occurrences of new seasonal blooms that began in 1999. This phytoplankton increase is paradoxical because it occurred in an era of decreasing wastewater nutrient inputs and reduced nitrogen and phosphorus concentrations, contrary to the guiding paradigm that algal biomass in estuaries increases in proportion to nutrient inputs from their watersheds. Coincidental changes included sharp declines in the abundance of bivalve mollusks, the key phytoplankton consumers in this estuary, and record high abundances of several bivalve predators: Bay shrimp, English sole, and Dungeness crab. The phytoplankton increase is consistent with a trophic cascade resulting from heightened predation on bivalves and suppression of their filtration control on phytoplankton growth. These community changes in San Francisco Bay across three trophic levels followed a state change in the California Current System characterized by increased upwelling intensity, amplified primary production, and strengthened southerly flows. These diagnostic features of the East Pacific \"cold phase\" lead to strong recruitment and immigration of juvenile flatfish and crustaceans into estuaries where they feed and develop. This study, built from three decades of observation, reveals a previously unrecognized mechanism of ocean-estuary connectivity. Interdecadal oceanic regime changes can propagate into estuaries, altering their community structure and efficiency of transforming land-derived nutrients into algal biomass.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Proceedings of the National Academy of Sciences of the United States of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1073/pnas.0706151104","issn":"00278424","usgsCitation":"Cloern, J.E., Jassby, A.D., Thompson, J.K., and Hieb, K., 2007, A cold phase of the East Pacific triggers new phytoplankton blooms in San Francisco Bay: Proceedings of the National Academy of Sciences of the United States of America, v. 104, no. 47, p. 18561-18565, https://doi.org/10.1073/pnas.0706151104.","productDescription":"5 p.","startPage":"18561","endPage":"18565","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":552,"text":"San Francisco Bay-Delta","active":false,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true},{"id":5079,"text":"Pacific Regional Director's Office","active":true,"usgs":true}],"links":[{"id":477147,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1073/pnas.0706151104","text":"Publisher Index Page"},{"id":239618,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212170,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1073/pnas.0706151104"}],"country":"United States","state":"California","city":"San Francisco","otherGeospatial":"San Francisco Bay","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -122.64862060546875,\n              37.391981943533544\n            ],\n            [\n              -121.74362182617188,\n              37.391981943533544\n            ],\n            [\n              -121.74362182617188,\n              38.238180119798635\n            ],\n            [\n              -122.64862060546875,\n              38.238180119798635\n            ],\n            [\n              -122.64862060546875,\n              37.391981943533544\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"104","issue":"47","noUsgsAuthors":false,"publicationDate":"2007-11-20","publicationStatus":"PW","scienceBaseUri":"5799db2ee4b0589fa1c7e66b","contributors":{"authors":[{"text":"Cloern, James E. 0000-0002-5880-6862 jecloern@usgs.gov","orcid":"https://orcid.org/0000-0002-5880-6862","contributorId":1488,"corporation":false,"usgs":true,"family":"Cloern","given":"James","email":"jecloern@usgs.gov","middleInitial":"E.","affiliations":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":431185,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jassby, Alan D.","contributorId":66403,"corporation":false,"usgs":true,"family":"Jassby","given":"Alan","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":431184,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Thompson, Janet K. 0000-0002-1528-8452 jthompso@usgs.gov","orcid":"https://orcid.org/0000-0002-1528-8452","contributorId":1009,"corporation":false,"usgs":true,"family":"Thompson","given":"Janet","email":"jthompso@usgs.gov","middleInitial":"K.","affiliations":[{"id":36183,"text":"Hydro-Ecological Interactions Branch","active":true,"usgs":true},{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":431186,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hieb, Kathryn","contributorId":174609,"corporation":false,"usgs":false,"family":"Hieb","given":"Kathryn","email":"","affiliations":[{"id":6952,"text":"California Department of Fish and Wildlife","active":true,"usgs":false}],"preferred":false,"id":431183,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031964,"text":"70031964 - 2007 - Controls on the Karaha-Telaga Bodas geothermal reservoir, Indonesia","interactions":[],"lastModifiedDate":"2012-03-12T17:21:26","indexId":"70031964","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1828,"text":"Geothermics","active":true,"publicationSubtype":{"id":10}},"title":"Controls on the Karaha-Telaga Bodas geothermal reservoir, Indonesia","docAbstract":"Karaha-Telaga Bodas is a partially vapor-dominated, fracture-controlled geothermal system located adjacent to Galunggung Volcano in western Java, Indonesia. The geothermal system consists of: (1) a caprock, ranging from several hundred to 1600 m in thickness, and characterized by a steep, conductive temperature gradient and low permeability; (2) an underlying vapor-dominated zone that extends below sea level; and (3) a deep liquid-dominated zone with measured temperatures up to 353 ??C. Heat is provided by a tabular granodiorite stock encountered at about 3 km depth. A structural analysis of the geothermal system shows that the effective base of the reservoir is controlled either by the boundary between brittle and ductile deformational regimes or by the closure and collapse of fractures within volcanic rocks located above the brittle/ductile transition. The base of the caprock is determined by the distribution of initially low-permeability lithologies above the reservoir; the extent of pervasive clay alteration that has significantly reduced primary rock permeabilities; the distribution of secondary minerals deposited by descending waters; and, locally, by a downward change from a strike-slip to an extensional stress regime. Fluid-producing zones are controlled by both matrix and fracture permeabilities. High matrix permeabilities are associated with lacustrine, pyroclastic, and epiclastic deposits. Productive fractures are those showing the greatest tendency to slip and dilate under the present-day stress conditions. Although the reservoir appears to be in pressure communication across its length, fluid, and gas chemistries vary laterally, suggesting the presence of isolated convection cells. ?? 2006 CNR.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geothermics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.geothermics.2006.09.005","issn":"03756505","usgsCitation":"Nemcok, M., Moore, J., Christensen, C., Allis, R., Powell, T., Murray, B., and Nash, G., 2007, Controls on the Karaha-Telaga Bodas geothermal reservoir, Indonesia: Geothermics, v. 36, no. 1, p. 9-46, https://doi.org/10.1016/j.geothermics.2006.09.005.","startPage":"9","endPage":"46","numberOfPages":"38","costCenters":[],"links":[{"id":214927,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.geothermics.2006.09.005"},{"id":242687,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"36","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fbd4e4b0c8380cd4dfb8","contributors":{"authors":[{"text":"Nemcok, M.","contributorId":104248,"corporation":false,"usgs":true,"family":"Nemcok","given":"M.","email":"","affiliations":[],"preferred":false,"id":433913,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Moore, J.N.","contributorId":22795,"corporation":false,"usgs":true,"family":"Moore","given":"J.N.","affiliations":[],"preferred":false,"id":433909,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Christensen, Carl","contributorId":43562,"corporation":false,"usgs":true,"family":"Christensen","given":"Carl","affiliations":[],"preferred":false,"id":433911,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Allis, R.","contributorId":14606,"corporation":false,"usgs":true,"family":"Allis","given":"R.","affiliations":[],"preferred":false,"id":433908,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Powell, T.","contributorId":33118,"corporation":false,"usgs":true,"family":"Powell","given":"T.","email":"","affiliations":[],"preferred":false,"id":433910,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Murray, B.","contributorId":90865,"corporation":false,"usgs":true,"family":"Murray","given":"B.","affiliations":[],"preferred":false,"id":433912,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Nash, G.","contributorId":8285,"corporation":false,"usgs":true,"family":"Nash","given":"G.","email":"","affiliations":[],"preferred":false,"id":433907,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70031353,"text":"70031353 - 2007 - Consequences of land-cover misclassification in models of impervious surface","interactions":[],"lastModifiedDate":"2023-02-10T17:53:07.880351","indexId":"70031353","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3052,"text":"Photogrammetric Engineering and Remote Sensing","active":true,"publicationSubtype":{"id":10}},"title":"Consequences of land-cover misclassification in models of impervious surface","docAbstract":"Model estimates of impervious area as a function of landcover area may be biased and imprecise because of errors in the land-cover classification. This investigation of the effects of land-cover misclassification on impervious surface models that use National Land Cover Data (NLCD) evaluates the consequences of adjusting land-cover within a watershed to reflect uncertainty assessment information. Model validation results indicate that using error-matrix information to adjust land-cover values used in impervious surface models does not substantially improve impervious surface predictions. Validation results indicate that the resolution of the landcover data (Level I and Level II) is more important in predicting impervious surface accurately than whether the land-cover data have been adjusted using information in the error matrix. Level I NLCD, adjusted for land-cover misclassification, is preferable to the other land-cover options for use in models of impervious surface. This result is tied to the lower classification error rates for the Level I NLCD. ?? 2007 American Society for Photogrammetry and Remote Sensing.","language":"English","publisher":"ASPRS","doi":"10.14358/PERS.73.12.1343","usgsCitation":"McMahon, G., 2007, Consequences of land-cover misclassification in models of impervious surface: Photogrammetric Engineering and Remote Sensing, v. 73, no. 12, p. 1343-1353, https://doi.org/10.14358/PERS.73.12.1343.","productDescription":"11 p.","startPage":"1343","endPage":"1353","numberOfPages":"11","costCenters":[{"id":565,"text":"Southeast Climate Science Center","active":true,"usgs":true}],"links":[{"id":477076,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.14358/pers.73.12.1343","text":"Publisher Index Page"},{"id":240061,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"73","issue":"12","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f9d5e4b0c8380cd4d7e6","contributors":{"authors":[{"text":"McMahon, Gerard 0000-0001-7675-777X gmcmahon@usgs.gov","orcid":"https://orcid.org/0000-0001-7675-777X","contributorId":191488,"corporation":false,"usgs":true,"family":"McMahon","given":"Gerard","email":"gmcmahon@usgs.gov","affiliations":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true},{"id":565,"text":"Southeast Climate Science Center","active":true,"usgs":true}],"preferred":true,"id":431172,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70031342,"text":"70031342 - 2007 - Local structuring factors of invertebrate communities in ephemeral freshwater rock pools and the influence of more permanent water bodies in the region","interactions":[],"lastModifiedDate":"2012-03-12T17:21:13","indexId":"70031342","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"title":"Local structuring factors of invertebrate communities in ephemeral freshwater rock pools and the influence of more permanent water bodies in the region","docAbstract":"We used three isolated clusters of small ephemeral rock pools on a sandstone flat in Utah to test the importance of local structuring processes on aquatic invertebrate communities. In the three clusters we characterized all ephemeral rock pools (total: 27) for their morphometry, and monitored their water quality, hydrology and community assemblage during a full hydrocycle. In each cluster we also sampled a set of more permanent interconnected freshwater systems positioned in a wash, draining the water from each cluster of rock pools. This design allowed additional testing for the potential role of more permanent water bodies in the region as source populations for the active dispersers and the effect on the community structure in the rock pools. Species richness and community composition in the rock pools correlated with level of permanence and the ammonia concentration. The length of the rock pool inundation cycle shaped community structure, most probably by inhibiting colonization by some taxa (e.g. tadpoles and insect larvae) through developmental constraints. The gradient in ammonia concentrations probably reflects differences in primary production. The more permanent water bodies in each wash differed both environmentally and in community composition from the connected set of rock pools. A limited set of active dispersers was observed in the rock pools. Our findings indicate that aquatic invertebrate communities in the ephemeral rock pools are mainly structured through habitat permanence, possibly linked with biotic interactions and primary production. ?? 2007 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrobiologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10750-007-0766-7","issn":"00188158","usgsCitation":"Jocque, M., Graham, T., and Brendonck, L., 2007, Local structuring factors of invertebrate communities in ephemeral freshwater rock pools and the influence of more permanent water bodies in the region: Hydrobiologia, v. 592, no. 1, p. 271-280, https://doi.org/10.1007/s10750-007-0766-7.","startPage":"271","endPage":"280","numberOfPages":"10","costCenters":[],"links":[{"id":212405,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10750-007-0766-7"},{"id":239885,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"592","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-07-24","publicationStatus":"PW","scienceBaseUri":"505a48e6e4b0c8380cd681eb","contributors":{"authors":[{"text":"Jocque, M.","contributorId":92055,"corporation":false,"usgs":true,"family":"Jocque","given":"M.","affiliations":[],"preferred":false,"id":431131,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Graham, T.","contributorId":79694,"corporation":false,"usgs":true,"family":"Graham","given":"T.","affiliations":[],"preferred":false,"id":431129,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Brendonck, L.","contributorId":86172,"corporation":false,"usgs":true,"family":"Brendonck","given":"L.","email":"","affiliations":[],"preferred":false,"id":431130,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031341,"text":"70031341 - 2007 - Manganese biogeochemistry in a central Czech Republic catchment","interactions":[],"lastModifiedDate":"2012-03-12T17:21:13","indexId":"70031341","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3728,"text":"Water, Air, & Soil Pollution","onlineIssn":"1573-2932","printIssn":"0049-6979","active":true,"publicationSubtype":{"id":10}},"title":"Manganese biogeochemistry in a central Czech Republic catchment","docAbstract":"Mn biogeochemistry was studied from 1994 to 2003 in a small forested catchment in the central Czech Republic using the watershed mass balance approach together with measurements of internal stores and fluxes. Mn inputs in bulk deposition were relatively constant during a period of sharply decreasing acidic deposition, suggesting that the Mn source was terrestrial, and not from fossil fuel combustion. Mn inputs in bulk deposition and Mn supplied by weathering each averaged 13 mg m-2 year-1 (26 mg m -2 year-1 total input), whereas Mn export in streamwater and groundwater averaged 43 mg m-2 year-1. Thus an additional Mn source is needed to account for 17 mg m-2 year -1. Internal fluxes and pools of Mn were significantly greater than annual inputs and outputs. Throughfall Mn flux was 70 mg m-2 year-1, litterfall Mn flux was 103 mg m-2 year -1, and Mn net uptake by vegetation was 62 mg m-2 year-1. Large pools of labile or potentially labile Mn were present in biomass and surficial soil horizons. Small leakages from these large pools likely supply the additional Mn needed to close the watershed mass balance. This leakage may reflect an adjustment of the ecosystem to recent changes in atmospheric acidity. ?? 2007 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Water, Air, and Soil Pollution","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s11270-007-9474-1","issn":"00496979","usgsCitation":"Navratil, T., Shanley, J.B., Skrivan, P., Kram, P., Mihaljevic, M., and Drahota, P., 2007, Manganese biogeochemistry in a central Czech Republic catchment: Water, Air, & Soil Pollution, v. 186, no. 1-4, p. 149-165, https://doi.org/10.1007/s11270-007-9474-1.","startPage":"149","endPage":"165","numberOfPages":"17","costCenters":[],"links":[{"id":239851,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212376,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s11270-007-9474-1"}],"volume":"186","issue":"1-4","noUsgsAuthors":false,"publicationDate":"2007-09-19","publicationStatus":"PW","scienceBaseUri":"505a4ca7e4b0c8380cd69ddf","contributors":{"authors":[{"text":"Navratil, T.","contributorId":32352,"corporation":false,"usgs":true,"family":"Navratil","given":"T.","affiliations":[],"preferred":false,"id":431125,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Shanley, J. B.","contributorId":52226,"corporation":false,"usgs":true,"family":"Shanley","given":"J.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":431126,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Skrivan, P.","contributorId":14197,"corporation":false,"usgs":true,"family":"Skrivan","given":"P.","email":"","affiliations":[],"preferred":false,"id":431123,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kram, P.","contributorId":84549,"corporation":false,"usgs":true,"family":"Kram","given":"P.","email":"","affiliations":[],"preferred":false,"id":431128,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Mihaljevic, M.","contributorId":74578,"corporation":false,"usgs":true,"family":"Mihaljevic","given":"M.","email":"","affiliations":[],"preferred":false,"id":431127,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Drahota, P.","contributorId":26139,"corporation":false,"usgs":true,"family":"Drahota","given":"P.","email":"","affiliations":[],"preferred":false,"id":431124,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70033014,"text":"70033014 - 2007 - Vertical spatial sensitivity and exploration depth of low-induction-number electromagnetic-induction instruments","interactions":[],"lastModifiedDate":"2018-04-02T15:24:51","indexId":"70033014","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3674,"text":"Vadose Zone Journal","active":true,"publicationSubtype":{"id":10}},"title":"Vertical spatial sensitivity and exploration depth of low-induction-number electromagnetic-induction instruments","docAbstract":"Vertical spatial sensitivity and effective depth of exploration (d e) of low-induction-number (LIN) instruments over a layered soil were evaluated using a complete numerical solution to Maxwell's equations. Previous studies using approximate mathematical solutions predicted a vertical spatial sensitivity for instruments operating under LIN conditions that, for a given transmitter-receiver coil separation (s), coil orientation, and transmitter frequency, should depend solely on depth below the land surface. When not operating under LIN conditions, vertical spatial sensitivity and de also depend on apparent soil electrical conductivity (??a) and therefore the induction number (??). In this new evaluation, we determined the range of ??a and ?? values for which the LIN conditions hold and how de changes when they do not. Two-layer soil models were simulated with both horizontal (HCP) and vertical (VCP) coplanar coil orientations. Soil layers were given electrical conductivity values ranging from 0.1 to 200 mS m-1. As expected, de decreased as ??a increased. Only the least electrically conductive soil produced the de expected when operating under LIN conditions. For the VCP orientation, this was 1.6s, decreasing to 0.8s in the most electrically conductive soil. For the HCP orientation, de decreased from 0.76s to 0.51s. Differences between this and previous studies are attributed to inadequate representation of skin-depth effect and scattering at interfaces between layers. When using LIN instruments to identify depth to water tables, interfaces between soil layers, and variations in salt or moisture content, it is important to consider the dependence of de on ??a. ?? Soil Science Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Vadose Zone Journal","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2136/vzj2006.0120","issn":"15391663","usgsCitation":"Callegary, J., Ferre, T., and Groom, R., 2007, Vertical spatial sensitivity and exploration depth of low-induction-number electromagnetic-induction instruments: Vadose Zone Journal, v. 6, no. 1, p. 158-167, https://doi.org/10.2136/vzj2006.0120.","startPage":"158","endPage":"167","numberOfPages":"10","costCenters":[],"links":[{"id":476982,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.503.2650","text":"External Repository"},{"id":240711,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213118,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2136/vzj2006.0120"}],"volume":"6","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc242e4b08c986b32aa15","contributors":{"authors":[{"text":"Callegary, J.B.","contributorId":71769,"corporation":false,"usgs":true,"family":"Callegary","given":"J.B.","affiliations":[],"preferred":false,"id":438977,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ferre, T.P.A.","contributorId":196167,"corporation":false,"usgs":false,"family":"Ferre","given":"T.P.A.","email":"","affiliations":[],"preferred":false,"id":438975,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Groom, R.W.","contributorId":59634,"corporation":false,"usgs":true,"family":"Groom","given":"R.W.","email":"","affiliations":[],"preferred":false,"id":438976,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70032951,"text":"70032951 - 2007 - Effects of population increase on cui-ui growth and maturation","interactions":[],"lastModifiedDate":"2012-03-12T17:21:39","indexId":"70032951","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3624,"text":"Transactions of the American Fisheries Society","active":true,"publicationSubtype":{"id":10}},"title":"Effects of population increase on cui-ui growth and maturation","docAbstract":"Cui-ui Chasmistes cujus is endemic to Pyramid Lake, Nevada. The cui-ui population declined during much of the 20th century as a result of water diversion and the formation of a shallow and virtually impassable delta at the mouth of the Truckee River, its spawning habitat. The population increased more than 10-fold to more than 1 million adults after access to the river was restored, creating a period of relatively higher density. This change presented the opportunity to test intraspecific density effects on cui-ui age and length at maturity and on growth. We also compared the year-class structure of the adult population before and after improved access. At low density, cui-ui mean age at maturation was 9.2 years for males and 9.6 for females; at high density, it was significantly higher: 11.8 years for males and 12.0 for females. There was no significant change in mean fork length at maturity related to population increase. Growth patterns differed between high and low density, the low-density fish growing faster than high-density fish before their respective mean age of maturity; past their mean age at maturity, high-density fish grew significantly faster than low-density fish. Fish in both density periods reached similar lengths by about 19-20 years of age. Year-class structure for both density periods consisted of strong year-classes, which predominated the adult population for several years.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Transactions of the American Fisheries Society","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1577/T05-199.1","issn":"00028487","usgsCitation":"Scoppettone, G., and Rissler, P., 2007, Effects of population increase on cui-ui growth and maturation: Transactions of the American Fisheries Society, v. 136, no. 2, p. 331-340, https://doi.org/10.1577/T05-199.1.","startPage":"331","endPage":"340","numberOfPages":"10","costCenters":[],"links":[{"id":213145,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/T05-199.1"},{"id":240741,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"136","issue":"2","noUsgsAuthors":false,"publicationDate":"2011-01-09","publicationStatus":"PW","scienceBaseUri":"505a0787e4b0c8380cd51734","contributors":{"authors":[{"text":"Scoppettone, G.G.","contributorId":22793,"corporation":false,"usgs":true,"family":"Scoppettone","given":"G.G.","email":"","affiliations":[],"preferred":false,"id":438675,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rissler, P.H.","contributorId":47539,"corporation":false,"usgs":true,"family":"Rissler","given":"P.H.","affiliations":[],"preferred":false,"id":438676,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70033578,"text":"70033578 - 2007 - Organic contaminants in onsite wastewater treatment systems","interactions":[],"lastModifiedDate":"2012-03-12T17:21:33","indexId":"70033578","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Organic contaminants in onsite wastewater treatment systems","docAbstract":"Wastewater from thirty onsite wastewater treatment systems was sampled during a reconnaissance field study to quantify bulk parameters and the occurrence of organic wastewater contaminants including endocrine disrupting compounds in treatment systems representing a variety of wastewater sources and treatment processes and their receiving environments. Bulk parameters ranged in concentrations representative of the wide variety of wastewater sources (residential vs. non-residential). Organic contaminants such as sterols, surfactant metabolites, antimicrobial agents, stimulants, metal-chelating agents, and other consumer product chemicals, measured by gas chromatography/mass spectrometry were detected frequently in onsite system wastewater. Wastewater composition was unique between source type likely due to differences in source water and chemical usage. Removal efficiencies varied by engineered treatment type and physicochemical properties of the contaminant, resulting in discharge to the soil treatment unit at ecotoxicologically-relevant concentrations. Organic wastewater contaminants were detected less frequently and at lower concentrations in onsite system receiving environments. Understanding the occurrence and fate of organic wastewater contaminants in onsite wastewater treatment systems will aid in minimizing risk to ecological and human health.","largerWorkTitle":"ASABE - Individual and Small Community Sewage Systems XI, Proceedings of the 11th National Symposium","conferenceTitle":"11th National Symposium on Individual and Small Community Sewage Systems","conferenceDate":"20 October 2007 through 24 October 2007","conferenceLocation":"Warwick, RI","language":"English","usgsCitation":"Conn, K., Siegrist, R., Barber, L.B., and Brown, G., 2007, Organic contaminants in onsite wastewater treatment systems, <i>in</i> ASABE - Individual and Small Community Sewage Systems XI, Proceedings of the 11th National Symposium, Warwick, RI, 20 October 2007 through 24 October 2007.","numberOfPages":"1","costCenters":[],"links":[{"id":242088,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6f9fe4b0c8380cd75bb6","contributors":{"authors":[{"text":"Conn, K.E.","contributorId":64433,"corporation":false,"usgs":true,"family":"Conn","given":"K.E.","email":"","affiliations":[],"preferred":false,"id":441515,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Siegrist, R.L.","contributorId":54005,"corporation":false,"usgs":true,"family":"Siegrist","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":441513,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Barber, L. B.","contributorId":64602,"corporation":false,"usgs":true,"family":"Barber","given":"L.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":441516,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Brown, G.K.","contributorId":62362,"corporation":false,"usgs":true,"family":"Brown","given":"G.K.","email":"","affiliations":[],"preferred":false,"id":441514,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70033223,"text":"70033223 - 2007 - The influence of major dams on hydrology through the drainage network of the Sacramento River basin, California","interactions":[],"lastModifiedDate":"2012-03-12T17:21:35","indexId":"70033223","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3301,"text":"River Research and Applications","active":true,"publicationSubtype":{"id":10}},"title":"The influence of major dams on hydrology through the drainage network of the Sacramento River basin, California","docAbstract":"This paper reports basinwide patterns of hydrograph alteration via statistical and graphical analysis from a network of long-term streamflow gauges located various distances downstream of major dams and confluences in the Sacramento River basin in California, USA. Streamflow data from 10 gauging stations downstream of major dams were divided into hydrologic series corresponding to the periods before and after dam construction. Pre- and post-dam flows were compared with respect to hydrograph characteristics representing frequency, magnitude and shape: annual flood peak, annual flow trough, annual flood volume, time to flood peak, flood drawdown time and interarrival time. The use of such a suite of characteristics within a statistical and graphical framework allows for generalising distinct strategies of flood control operation that can be identified without any a priori knowledge of operations rules. Dam operation is highly dependent on the ratio of reservoir capacity to annual flood volume (impounded runoff index). Dams with high values of this index generally completely cut off flood peaks thus reducing time to peak, drawdown time and annual flood volume. Those with low values conduct early and late flow releases to extend the hydrograph, increasing time to peak, drawdown time and annual flood volume. The analyses reveal minimal flood control benefits from foothill dams in the lower Sacramento River (i.e. dissipation of the down-valley flood control signal). The lower part of the basin is instead reliant on a weir and bypass system to control lowland flooding. Data from a control gauge (i.e. with no upstream dams) suggest a background signature of global climate change expressed as shortened flood hydrograph falling limbs and lengthened flood interarrival times at low exceedence probabilities. This research has implications for flood control, water resource management, aquatic and riparian ecosystems and for rehabilitation strategies involving flow alteration and/or manipulation of sediment supplies. Copyright ?? 2006 John Wiley & Sons, Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"River Research and Applications","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/rra.968","issn":"15351459","usgsCitation":"Singer, M., 2007, The influence of major dams on hydrology through the drainage network of the Sacramento River basin, California: River Research and Applications, v. 23, no. 1, p. 55-72, https://doi.org/10.1002/rra.968.","startPage":"55","endPage":"72","numberOfPages":"18","costCenters":[],"links":[{"id":213187,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/rra.968"},{"id":240790,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"1","noUsgsAuthors":false,"publicationDate":"2006-10-26","publicationStatus":"PW","scienceBaseUri":"505bad2de4b08c986b323a2a","contributors":{"authors":[{"text":"Singer, M.B.","contributorId":67274,"corporation":false,"usgs":true,"family":"Singer","given":"M.B.","email":"","affiliations":[],"preferred":false,"id":439906,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70032930,"text":"70032930 - 2007 - Diversity of terrestrial avifauna in response to distance from the shoreline of the Salton Sea","interactions":[],"lastModifiedDate":"2023-09-08T11:18:43.845764","indexId":"70032930","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2183,"text":"Journal of Arid Environments","active":true,"publicationSubtype":{"id":10}},"title":"Diversity of terrestrial avifauna in response to distance from the shoreline of the Salton Sea","docAbstract":"<div id=\"abstracts\" class=\"Abstracts u-font-gulliver text-s\"><div id=\"aep-abstract-id9\" class=\"abstract author\"><div id=\"aep-abstract-sec-id10\"><p>Large aquatic bodies influence surrounding terrestrial ecosystems by providing water and nutrients. In arid landscapes, the increased primary productivity that results may greatly enhance vertebrate biodiversity. The Salton Sea, a large saline lake in the Colorado Desert of southern California, provides nutrients in the form of hundreds of thousands of dead fish carcasses, brine flies, and chemical compounds through windborne salt sea spray. We performed point counts for landbirds and shorebirds monthly or every other month between March 2001 and February 2002 across a sampling grid of 35 points along the west edge of Salton Sea. We found that avian diversity (numbers of species and numbers per species) was dependent on proximity to the Sea. Diversity was at a maximum nearest the shore, and was significantly lower away from the Sea's edge, at all surveyed distances up to 1&nbsp;km from the shore. Cover by the dominant shrubs on the study site also corresponded to proximity to the water's edge. Whereas one may hypothesize that the avian diversity patterns are caused by these differences in vegetation structure, our data did not support this. Future studies should further investigate this potential correlation between vegetation and bird patterns. Until more is understood about the relationship between elevated avian diversity and the physical environment of the land-shore interface, our results suggest that the Sea's surface be stabilized near its present level. Future management schemes at the Salton Sea that include reductions of water sources should be carefully analyzed, so as to not jeopardize the terrestrial avifauna at this unique ecosystem.</p></div></div></div>","language":"English","publisher":"Elsevier","doi":"10.1016/j.jaridenv.2006.07.012","issn":"01401963","usgsCitation":"Mendelsohn, M., Boarman, W., Fisher, R., and Hathaway, S., 2007, Diversity of terrestrial avifauna in response to distance from the shoreline of the Salton Sea: Journal of Arid Environments, v. 68, no. 4, p. 574-587, https://doi.org/10.1016/j.jaridenv.2006.07.012.","productDescription":"14 p.","startPage":"574","endPage":"587","numberOfPages":"14","costCenters":[],"links":[{"id":240971,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"68","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0352e4b0c8380cd50423","contributors":{"authors":[{"text":"Mendelsohn, M.B.","contributorId":68676,"corporation":false,"usgs":true,"family":"Mendelsohn","given":"M.B.","email":"","affiliations":[],"preferred":false,"id":438589,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Boarman, W.I.","contributorId":73523,"corporation":false,"usgs":true,"family":"Boarman","given":"W.I.","email":"","affiliations":[],"preferred":false,"id":438590,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Fisher, Robert N. 0000-0002-2956-3240","orcid":"https://orcid.org/0000-0002-2956-3240","contributorId":51675,"corporation":false,"usgs":true,"family":"Fisher","given":"Robert N.","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":438587,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hathaway, S.A.","contributorId":56990,"corporation":false,"usgs":true,"family":"Hathaway","given":"S.A.","email":"","affiliations":[],"preferred":false,"id":438588,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031739,"text":"70031739 - 2007 - Comparison of local- to regional-scale estimates of ground-water recharge in Minnesota, USA","interactions":[],"lastModifiedDate":"2023-10-03T11:20:41.383437","indexId":"70031739","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Comparison of local- to regional-scale estimates of ground-water recharge in Minnesota, USA","docAbstract":"<p><span>Regional ground-water recharge estimates for Minnesota were compared to estimates made on the basis of four local- and basin-scale methods. Three local-scale methods (unsaturated-zone water balance, water-table fluctuations (WTF) using three approaches, and age dating of ground water) yielded point estimates of recharge that represent spatial scales from about 1 to about 1000&nbsp;m</span><sup>2</sup><span>. A fourth method (RORA, a basin-scale analysis of streamflow records using a recession-curve-displacement technique) yielded recharge estimates at a scale of 10&ndash;1000s of km</span><sup>2</sup><span>. The RORA basin-scale recharge estimates were regionalized to estimate recharge for the entire State of Minnesota on the basis of a regional regression recharge (RRR) model that also incorporated soil and climate data. Recharge rates estimated by the RRR model compared favorably to the local and basin-scale recharge estimates. RRR estimates at study locations were about 41% less on average than the unsaturated-zone water-balance estimates, ranged from 44% greater to 12% less than estimates that were based on the three WTF approaches, were about 4% less than the age dating of ground-water estimates, and were about 5% greater than the RORA estimates. Of the methods used in this study, the WTF method is the simplest and easiest to apply. Recharge estimates made on the basis of the UZWB method were inconsistent with the results from the other methods. Recharge estimates using the RRR model could be a good source of input for regional ground-water flow models; RRR model results currently are being applied for this purpose in USGS studies elsewhere.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.jhydrol.2006.10.010","issn":"00221694","usgsCitation":"Delin, G., Healy, R.W., Lorenz, D., and Nimmo, J., 2007, Comparison of local- to regional-scale estimates of ground-water recharge in Minnesota, USA: Journal of Hydrology, v. 334, no. 1-2, p. 231-249, https://doi.org/10.1016/j.jhydrol.2006.10.010.","productDescription":"19 p.","startPage":"231","endPage":"249","numberOfPages":"19","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":392,"text":"Minnesota Water Science Center","active":true,"usgs":true}],"links":[{"id":239641,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United 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,{"id":70031276,"text":"70031276 - 2007 - Scale-dependent habitat selection of nesting Great Egrets and Snowy Egrets","interactions":[],"lastModifiedDate":"2012-03-12T17:21:12","indexId":"70031276","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3731,"text":"Waterbirds","onlineIssn":"19385390","printIssn":"15244695","active":true,"publicationSubtype":{"id":10}},"title":"Scale-dependent habitat selection of nesting Great Egrets and Snowy Egrets","docAbstract":"Foraging habitat selection of nesting Great Egrets (Ardea alba) and Snowy Egrets (Egretta thula) was investigated within an estuary with extensive impounded salt marsh habitat. Using a geographic information system, available habitat was partitioned into concentric bands at five, ten, and 15 km radius from nesting colonies to assess the relative effects of habitat composition and distance on habitat selection. Snowy Egrets were more likely than Great Egrets to depart colonies and travel to foraging sites in groups, but both species usually arrived at sites that were occupied by other wading birds. Mean flight distances were 6.2 km (SE = 0.4, N = 28, range 1.8-10.7 km) for Great Egrets and 4.7 km (SE = 0.48, N = 31, range 0.7-12.5 km) for Snowy Egrets. At the broadest spatial scale both species used impounded (mostly salt marsh) and estuarine edge habitat more than expected based on availability while avoiding unimpounded (mostly fresh water wetland) habitat. At more local scales habitat use matched availability. Interpretation of habitat preference differed with the types of habitat that were included and the maximum distance that habitat was considered available. These results illustrate that caution is needed when interpreting the results of habitat preference studies when individuals are constrained in their choice of habitats, such as for central place foragers.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Waterbirds","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1675/1524-4695(2007)030[0384:SHSONG]2.0.CO;2","issn":"15244695","usgsCitation":"Stolen, E.D., Collazo, J., and Percival, H., 2007, Scale-dependent habitat selection of nesting Great Egrets and Snowy Egrets: Waterbirds, v. 30, no. 3, p. 384-393, https://doi.org/10.1675/1524-4695(2007)030[0384:SHSONG]2.0.CO;2.","startPage":"384","endPage":"393","numberOfPages":"10","costCenters":[],"links":[{"id":239982,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212491,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1675/1524-4695(2007)030[0384:SHSONG]2.0.CO;2"}],"volume":"30","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b870ee4b08c986b3162a1","contributors":{"authors":[{"text":"Stolen, Eric D.","contributorId":28432,"corporation":false,"usgs":true,"family":"Stolen","given":"Eric","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":430861,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Collazo, J.A.","contributorId":35039,"corporation":false,"usgs":true,"family":"Collazo","given":"J.A.","affiliations":[],"preferred":false,"id":430863,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Percival, H.F.","contributorId":31716,"corporation":false,"usgs":true,"family":"Percival","given":"H.F.","email":"","affiliations":[],"preferred":false,"id":430862,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031383,"text":"70031383 - 2007 - Human enteric viruses in groundwater from a confined bedrock aquifer","interactions":[],"lastModifiedDate":"2020-09-10T17:19:35.864259","indexId":"70031383","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Human enteric viruses in groundwater from a confined bedrock aquifer","docAbstract":"<p><span>Confined aquifers are overlain by low-permeability aquitards that are commonly assumed to protect underlying aquifers from microbial contaminants. However, empirical data on microbial contamination beneath aquitards is limited. This study determined the occurrence of human pathogenic viruses in well water from a deep sandstone aquifer confined by a regionally extensive shale aquitard. Three public water-supply wells were each sampled 10 times over 15 months. Samples were analyzed by reverse transcription−polymerase chain reaction (RT-PCR) for several virus groups and by cell culture for infectious enteroviruses. Seven of 30 samples were positive by RT-PCR for enteroviruses; one of these was positive for infectious echovirus 18. The virus-positive samples were collected from two wells cased through the aquitard, indicating the viruses were present in the confined aquifer. Samples from the same wells showed atmospheric tritium, indicating water recharged within the past few decades. Hydrogeologic conditions support rapid porous media transport of viruses through the upper sandstone aquifer to the top of the aquitard 61 m below ground surface. Natural fractures in the shale aquitard are one possible virus transport pathway through the aquitard; however, windows, cross-connecting well bores, or imperfect grout seals along well casings also may be involved. Deep confined aquifers can be more vulnerable to contamination by human viruses than commonly believed.</span></p>","language":"English","publisher":"ACS Publications","doi":"10.1021/es071110","usgsCitation":"Borchardt, M., Bradbury, K.R., Gotkowitz, M., Cherry, J.A., and Parker, B., 2007, Human enteric viruses in groundwater from a confined bedrock aquifer: Environmental Science & Technology, v. 41, no. 18, p. 6606-6612, https://doi.org/10.1021/es071110.","productDescription":"7 p.","startPage":"6606","endPage":"6612","numberOfPages":"7","costCenters":[],"links":[{"id":239989,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Wisconsin","city":"Madison","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -89.38098907470702,\n              43.032760685832\n            ],\n            [\n              -89.33052062988281,\n              43.032760685832\n            ],\n            [\n              -89.33052062988281,\n              43.13331170781402\n            ],\n            [\n              -89.38098907470702,\n              43.13331170781402\n            ],\n            [\n              -89.38098907470702,\n              43.032760685832\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"41","issue":"18","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a327de4b0c8380cd5e83f","contributors":{"authors":[{"text":"Borchardt, M. A.","contributorId":62804,"corporation":false,"usgs":true,"family":"Borchardt","given":"M. A.","affiliations":[],"preferred":false,"id":431284,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bradbury, K. R.","contributorId":86070,"corporation":false,"usgs":true,"family":"Bradbury","given":"K.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":431285,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gotkowitz, M.B.","contributorId":37537,"corporation":false,"usgs":true,"family":"Gotkowitz","given":"M.B.","email":"","affiliations":[],"preferred":false,"id":431282,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cherry, J. A.","contributorId":24880,"corporation":false,"usgs":true,"family":"Cherry","given":"J.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":431281,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Parker, B.L.","contributorId":51971,"corporation":false,"usgs":true,"family":"Parker","given":"B.L.","email":"","affiliations":[],"preferred":false,"id":431283,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031385,"text":"70031385 - 2007 - Effects of depth and crayfish size on predation risk and foraging profitability of a lotic crayfish","interactions":[],"lastModifiedDate":"2012-03-12T17:21:13","indexId":"70031385","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2564,"text":"Journal of the North American Benthological Society","onlineIssn":"1937-237X","printIssn":"0887-3593","active":true,"publicationSubtype":{"id":10}},"title":"Effects of depth and crayfish size on predation risk and foraging profitability of a lotic crayfish","docAbstract":"We conducted field surveys and experiments to determine whether observed distributions of crayfish among habitats were influenced by differential resource availability, foraging profitability, and predation rates and whether these factors differed with crayfish size and habitat depth. We sampled available food resources (detritus and invertebrates) and shelter as rock substrate in deep (>50 cm) and shallow (<30 cm) habitats. We used an enclosure-exclosure experiment to examine the effects of water depth and crayfish size on crayfish biomass and survival, and to determine whether these factors affected silt accrual, algal abundance (chlorophyll a [chl a]), and detritus and invertebrate biomass (g ash-free dry mass) differently from enclosures without crayfish. We conducted tethering experiments to assess predation on small (13-17 mm carapace length [CL]) and large (23-30 mm CL) Orconectes marchandi and to determine whether predation rates differed with water depth. Invertebrate biomass was significantly greater in shallow water than in deep water, whereas detritus biomass did not differ significantly between depths. Cobble was significantly more abundant in shallow than in deep water. Depth and crayfish size had a significant interactive effect on change in size of enclosed crayfish when CL was used as a measure of size but not when biomass was used as a measure of size. CL of small crayfish increased significantly more in enclosures in shallow than in deep water, but CL of large crayfish changed very little at either depth. Silt, chl a, and detritus biomass were significantly lower on tiles in large- than in small- and no-crayfish enclosures, and invertebrate biomass was significantly lower in large- than in no-crayfish enclosures. Significantly more crayfish were consumed in deep than in shallow water regardless of crayfish size. Our results suggest that predation and resource availability might influence the depth distribution of small and large crayfish. Small crayfish grew faster in shallow habitats where they might have had a fitness advantage caused by high prey availability and reduced predation risk. Size-dependent reduction of silt by crayfish might influence benthic habitats where large crayfish are abundant. ?? 2007 by The North American Benthological Society.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of the North American Benthological Society","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1899/06-103.1","issn":"08873593","usgsCitation":"Flinders, C., and Magoulick, D., 2007, Effects of depth and crayfish size on predation risk and foraging profitability of a lotic crayfish: Journal of the North American Benthological Society, v. 26, no. 4, p. 767-778, https://doi.org/10.1899/06-103.1.","startPage":"767","endPage":"778","numberOfPages":"12","costCenters":[],"links":[{"id":212528,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1899/06-103.1"},{"id":240025,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"26","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a06c4e4b0c8380cd513eb","contributors":{"authors":[{"text":"Flinders, C.A.","contributorId":6257,"corporation":false,"usgs":true,"family":"Flinders","given":"C.A.","email":"","affiliations":[],"preferred":false,"id":431289,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Magoulick, D.D.","contributorId":80862,"corporation":false,"usgs":true,"family":"Magoulick","given":"D.D.","affiliations":[],"preferred":false,"id":431290,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031211,"text":"70031211 - 2007 - Potential hazards of environmental contaminants to avifauna residing in the Chesapeake Bay estuary","interactions":[],"lastModifiedDate":"2017-01-03T13:35:04","indexId":"70031211","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3731,"text":"Waterbirds","onlineIssn":"19385390","printIssn":"15244695","active":true,"publicationSubtype":{"id":10}},"title":"Potential hazards of environmental contaminants to avifauna residing in the Chesapeake Bay estuary","docAbstract":"A search of the Contaminant Exposure and Effects-Terrestrial Vertebrates (CEE-TV) database revealed that 70% of the 839 Chesapeake Bay records deal with avian species. Studies conducted on waterbirds in the past 15 years indicate that organochlorine contaminants have declined in eggs and tissues, although p,p'-DDE, total polychlorinated biphenyls (PCBs) and coplanar PCB congeners may still exert sublethal and reproductive effects in some locations. There have been numerous reports of avian die-off events related to organophosphorus and carbamate pesticides. More contemporary contaminants (e.g., alkylphenols, ethoxylates, perfluorinated compounds, polybrominated diphenyl ethers) are detectable in bird eggs in the most industrialized portions of the Bay, but interpretation of these data is difficult because adverse effect levels are incompletely known for birds. Two moderaterized oil spills resulted in the death of several hundred birds, and about 500 smaller spill events occur annually in the watershed. With the exception of lead, concentrations of cadmium, mercury, and selenium in eggs and tissues appear to be below toxic thresholds for waterbirds. Fishing tackle and discarded plastics, that can entangle and kill young and adults, are prevalent in nests in some Bay tributaries. It is apparent that exposure and potential effects of several classes of contaminants (e.g., dioxins, dibenzofurans, rodenticides, pharmaceuticals, personal care products, lead shot, and some metals) have not been systematically examined in the past 15 years, highlighting the need for toxicological evaluation of birds found dead, and perhaps an avian ecotoxicological monitoring program. Although oil spills, spent lead shot, some pesticides, and industrial pollutants occasionally harm Chesapeake avifauna, contaminants no longer evoke the population level effects that were observed in Ospreys (Pandion haliaetus) and Bald Eagles (Haliaeetus leucocephalus) through the 1970s.","language":"English","publisher":"The Waterbird Society","doi":"10.1675/1524-4695(2007)030[0063:PHOECT]2.0.CO;2","issn":"15244695","usgsCitation":"Rattner, B.A., and McGowan, P.C., 2007, Potential hazards of environmental contaminants to avifauna residing in the Chesapeake Bay estuary: Waterbirds, v. 30, no. sp1, p. 63-81, https://doi.org/10.1675/1524-4695(2007)030[0063:PHOECT]2.0.CO;2.","productDescription":"19 p.","startPage":"63","endPage":"81","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":238983,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211655,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1675/1524-4695(2007)030[0063:PHOECT]2.0.CO;2"}],"volume":"30","issue":"sp1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7f34e4b0c8380cd7a9ae","contributors":{"authors":[{"text":"Rattner, Barnett A. 0000-0003-3676-2843 brattner@usgs.gov","orcid":"https://orcid.org/0000-0003-3676-2843","contributorId":4142,"corporation":false,"usgs":true,"family":"Rattner","given":"Barnett","email":"brattner@usgs.gov","middleInitial":"A.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":true,"id":430547,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McGowan, Peter C.","contributorId":13867,"corporation":false,"usgs":false,"family":"McGowan","given":"Peter","email":"","middleInitial":"C.","affiliations":[{"id":6987,"text":"U.S. Fish and Wildlife Sevice","active":true,"usgs":false}],"preferred":false,"id":430546,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70032731,"text":"70032731 - 2007 - Subaqueous geology and a filling model for Crater Lake, Oregon","interactions":[],"lastModifiedDate":"2019-03-04T11:45:52","indexId":"70032731","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"title":"Subaqueous geology and a filling model for Crater Lake, Oregon","docAbstract":"<p>Results of a detailed bathymetric survey of Crater Lake conducted in 2000, combined with previous results of submersible and dredge sampling, form the basis for a geologic map of the lake floor and a model for the filling of Crater Lake with water. The most prominent landforms beneath the surface of Crater Lake are andesite volcanoes that were active as the lake was filling with water, following caldera collapse during the climactic eruption of Mount Mazama 7700 cal. yr B.P. The Wizard Island volcano is the largest and probably was active longest, ceasing eruptions when the lake was 80 m lower than present. East of Wizard Island is the central platform volcano and related lava flow fields on the caldera floor. Merriam Cone is a symmetrical andesitic volcano that apparently was constructed subaqueously during the same period as the Wizard Island and central platform volcanoes. The youngest postcaldera volcanic feature is a small rhyodacite dome on the east flank of the Wizard Island edifice that dates from 4800 cal. yr B.P. The bathymetry also yields information on bedrock outcrops and talus/debris slopes of the caldera walls. Gravity flows transport sediment from wall sources to the deep basins of the lake. Several debris-avalanche deposits, containing blocks up to 280 m long, are present on the caldera floor and occur below major embayments in the caldera walls. Geothermal phenomena on the lake floor are bacterial mats, pools of solute-rich warm water, and fossil subaqueous hot spring deposits. Lake level is maintained by a balance between precipitation and inflow versus evaporation and leakage. High-resolution bathymetry reveals a series of up to nine drowned beaches in the upper 30 m of the lake that we propose reflect stillstands subsequent to filling of Crater Lake. A prominent wave-cut platform between 4 m depth and present lake level that commonly is up to 40 m wide suggests that the surface of Crater Lake has been at this elevation for a very long time. Lake level apparently is limited by leakage through a permeable layer in the northeast caldera wall. The deepest drowned beach approximately corresponds to the base of the permeable layer. Among a group of lake filling models, our preferred one is constrained by the drowned beaches, the permeable layer in the caldera wall, and paleoclimatic data. We used a precipitation rate 70% of modern as a limiting case. Satisfactory models require leakage to be proportional to elevation and the best fit model has a linear combination of 45% leakage proportional to elevation and 55% of leakage proportional to elevation above the base of the permeable layer. At modern precipitation rates, the lake would have taken 420 yr to fill, or a maximum of 740 yr if precipitation was 70% of the modern value. The filling model provides a chronology for prehistoric passage zones on postcaldera volcanoes that ceased erupting before the lake was filled.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrobiologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10750-006-0343-5","issn":"00188158","usgsCitation":"Nathenson, M., Bacon, C., and Ramsey, D., 2007, Subaqueous geology and a filling model for Crater Lake, Oregon: Hydrobiologia, v. 574, no. 1, p. 13-27, https://doi.org/10.1007/s10750-006-0343-5.","productDescription":"15 p.","startPage":"13","endPage":"27","numberOfPages":"15","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true},{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"links":[{"id":477074,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://zenodo.org/record/1232804","text":"External Repository"},{"id":241599,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213925,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10750-006-0343-5"}],"volume":"574","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9cffe4b08c986b31d59f","contributors":{"authors":[{"text":"Nathenson, M.","contributorId":46632,"corporation":false,"usgs":true,"family":"Nathenson","given":"M.","email":"","affiliations":[],"preferred":false,"id":437663,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bacon, C. R. 0000-0002-2165-5618","orcid":"https://orcid.org/0000-0002-2165-5618","contributorId":21522,"corporation":false,"usgs":true,"family":"Bacon","given":"C. R.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":false,"id":437662,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ramsey, D.W.","contributorId":95219,"corporation":false,"usgs":true,"family":"Ramsey","given":"D.W.","email":"","affiliations":[],"preferred":false,"id":437664,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031068,"text":"70031068 - 2007 - Quantitative PCR detection of Batrachochytrium dendrobatidis DNA from sediments and water","interactions":[],"lastModifiedDate":"2018-10-17T08:26:57","indexId":"70031068","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1396,"text":"Diseases of Aquatic Organisms","active":true,"publicationSubtype":{"id":10}},"title":"Quantitative PCR detection of Batrachochytrium dendrobatidis DNA from sediments and water","docAbstract":"<p>The fungal pathogen Batrachochytrium dendrobatidis (Bd) causes chytridiomycosis, a disease implicated in amphibian declines on 5 continents. Polymerase chain reaction (PCR) primer sets exist with which amphibians can be tested for this disease, and advances in sampling techniques allow non-invasive testing of animals. We developed filtering and PCR based quantitative methods by modifying existing PCR assays to detect Bd DNA in water and sediments, without the need for testing amphibians; we tested the methods at 4 field sites. The SYBR based assay using Boyle primers (SYBR/Boyle assay) and the Taqman based assay using Wood primers performed similarly with samples generated in the laboratory (Bd spiked filters), but the SYBR/Boyle assay detected Bd DNA in more field samples. We detected Bd DNA in water from 3 of 4 sites tested, including one pond historically negative for chytridiomycosis. Zoospore equivalents in sampled water ranged from 19 to 454 l-1 (nominal detection limit is 10 DNA copies, or about 0.06 zoospore). We did not detect DNA of Bd from sediments collected at any sites. Our filtering and amplification methods provide a new tool to investigate critical aspects of Bd in the environment.</p>","language":"English","publisher":"Inter-Research","doi":"10.3354/dao01831","issn":"01775103","usgsCitation":"Kirshtein, J.D., Anderson, C., Wood, J., Longcore, J.E., and Voytek, M.A., 2007, Quantitative PCR detection of Batrachochytrium dendrobatidis DNA from sediments and water: Diseases of Aquatic Organisms, v. 77, no. 1, p. 11-15, https://doi.org/10.3354/dao01831.","productDescription":"5 p.","startPage":"11","endPage":"15","numberOfPages":"5","costCenters":[{"id":518,"text":"Oregon Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":487663,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3354/dao01831","text":"Publisher Index Page"},{"id":238780,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211484,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3354/dao01831"}],"volume":"77","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a91f9e4b0c8380cd8059d","contributors":{"authors":[{"text":"Kirshtein, Julie D.","contributorId":26033,"corporation":false,"usgs":true,"family":"Kirshtein","given":"Julie","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":429899,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Anderson, Chauncey W. 0000-0002-1016-3781 chauncey@usgs.gov","orcid":"https://orcid.org/0000-0002-1016-3781","contributorId":1151,"corporation":false,"usgs":true,"family":"Anderson","given":"Chauncey W.","email":"chauncey@usgs.gov","affiliations":[{"id":518,"text":"Oregon Water Science Center","active":true,"usgs":true}],"preferred":false,"id":429898,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wood, J.S.","contributorId":43974,"corporation":false,"usgs":true,"family":"Wood","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":429900,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Longcore, Joyce E.","contributorId":67464,"corporation":false,"usgs":true,"family":"Longcore","given":"Joyce","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":429902,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Voytek, Mary A.","contributorId":91943,"corporation":false,"usgs":true,"family":"Voytek","given":"Mary","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":429901,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70030966,"text":"70030966 - 2007 - Aquatic vertebrate assemblages of the upper Clear Creek Watershed, California","interactions":[],"lastModifiedDate":"2021-03-31T12:07:50.61146","indexId":"70030966","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3746,"text":"Western North American Naturalist","onlineIssn":"1944-8341","printIssn":"1527-0904","active":true,"publicationSubtype":{"id":10}},"title":"Aquatic vertebrate assemblages of the upper Clear Creek Watershed, California","docAbstract":"We sampled streams in the Upper Clear Creek Watershed in northwestern California in fall 2004 and fall 2005 to document assemblages of aquatic vertebrates and to provide resource managers with information on the importance of these assemblages in terms of regional biodiversity. We used single-pass backpack electrofishing to sample 15 sites in fall 2004 and the same 15 sites plus 4 new sites in fall 2005. We captured 10 fish taxa and 2 species of larval amphibians. Seven of the fish taxa were native species. Of the exotic species, only brook trout (Salvelinus fontinalis) occurred at more than 1 site. Ordinations by nonmetric multidimensional scaling indicated a gradient from sites with rainbow trout (Oncorhynchus mykiss), Pacific giant salamander (Dicamptodon tenebrosus), and tailed frog (Ascaphus truei) to sites dominated by riffle sculpin (Cottus gulosus), California roach (Hesperoleucas symmetricus), and Sacramento sucker (Catostomus occidentalis). The gradient in species composition was associated with changes in elevation, gradient, discharge, and substrate. The Upper Clear Creek Watershed represents a unique area of overlap between the North Coast California amphibian fauna and the Central Valley fish fauna with a notable paucity of exotic fishes and amphibians. Preservation of the integrity of native aquatic assemblages is an important goal for aquatic resource management in the region; our results provide a critcial baseline to gauge future management actions.","language":"English","publisher":"BioOne","doi":"10.3398/1527-0904(2007)67[439:AVAOTU]2.0.CO;2","issn":"15270904","usgsCitation":"Brown, L., and May, J., 2007, Aquatic vertebrate assemblages of the upper Clear Creek Watershed, California: Western North American Naturalist, v. 67, no. 3, p. 439-451, https://doi.org/10.3398/1527-0904(2007)67[439:AVAOTU]2.0.CO;2.","productDescription":"13 p.","startPage":"439","endPage":"451","numberOfPages":"13","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":486929,"rank":1,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://scholarsarchive.byu.edu/wnan/vol67/iss3/12","text":"External Repository"},{"id":238674,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Upper Clear Creek watershed","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -121.1187744140625,\n              40.24389506699777\n            ],\n            [\n              -120.99998474121094,\n              40.24389506699777\n            ],\n            [\n              -120.99998474121094,\n              40.36171874694918\n            ],\n            [\n              -121.1187744140625,\n              40.36171874694918\n            ],\n            [\n              -121.1187744140625,\n              40.24389506699777\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"67","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ed14e4b0c8380cd495fb","contributors":{"authors":[{"text":"Brown, L. R. 0000-0001-6702-4531","orcid":"https://orcid.org/0000-0001-6702-4531","contributorId":66391,"corporation":false,"usgs":true,"family":"Brown","given":"L. R.","affiliations":[],"preferred":false,"id":429425,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"May, J. T. 0000-0002-5699-2112","orcid":"https://orcid.org/0000-0002-5699-2112","contributorId":72505,"corporation":false,"usgs":true,"family":"May","given":"J. T.","affiliations":[],"preferred":false,"id":429426,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031065,"text":"70031065 - 2007 - Common Loon (Gavia immer) eggshell thickness and egg volume vary with acidity of nest lake in northern Wisconsin","interactions":[],"lastModifiedDate":"2012-03-12T17:21:16","indexId":"70031065","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3731,"text":"Waterbirds","onlineIssn":"19385390","printIssn":"15244695","active":true,"publicationSubtype":{"id":10}},"title":"Common Loon (Gavia immer) eggshell thickness and egg volume vary with acidity of nest lake in northern Wisconsin","docAbstract":"Environmental acidification has been associated with factors that may negatively affect reproduction in many waterbirds. Declines in lake pH can lead to reductions in food availability and quality, or result in the altered availability of toxic metals, such as mercury. A recent laboratory study conducted by the U.S. Geological Survey and the Wisconsin Department of Natural Resources indicated that Common Loon (Gavia immer) chicks hatched from eggs collected on acidic lakes in northern Wisconsin may be less responsive to stimuli and exhibit reduced growth compared to chicks from neutral-pH lakes. Here we report on the relation between Common Loon egg characteristics (eggshell thickness and egg volume) and lake pH, as well as eggshell methylmercury content. Eggs (N = 84) and lake pH measurements were obtained from a four county region of northern Wisconsin. Egg-shells were 3-4% thinner on lakes with pH ??? 6.3 than on neutral-pH lakes and this relation was linear across the pH range investigated (P < 0.05). Egg volume also tended to be larger in eggs from neutral-pH lakes. Eggshell methylmercury content however was not significantly related to shell thickness (P > 0.05, n.s.) or lake pH. Results suggest that low lake pH may be associated with thinner eggshells and reduced egg volume in Common Loons. We speculate on the mechanisms that may lead to this phenomeno.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Waterbirds","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1675/1524-4695(2007)030[0367:CLGIET]2.0.CO;2","issn":"15244695","usgsCitation":"Pollentier, C., Kenow, K., and Meyer, M., 2007, Common Loon (Gavia immer) eggshell thickness and egg volume vary with acidity of nest lake in northern Wisconsin: Waterbirds, v. 30, no. 3, p. 367-374, https://doi.org/10.1675/1524-4695(2007)030[0367:CLGIET]2.0.CO;2.","startPage":"367","endPage":"374","numberOfPages":"8","costCenters":[],"links":[{"id":238745,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211454,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1675/1524-4695(2007)030[0367:CLGIET]2.0.CO;2"}],"volume":"30","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f7fae4b0c8380cd4cdf3","contributors":{"authors":[{"text":"Pollentier, C.D.","contributorId":78538,"corporation":false,"usgs":true,"family":"Pollentier","given":"C.D.","email":"","affiliations":[],"preferred":false,"id":429891,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kenow, K.P.","contributorId":18302,"corporation":false,"usgs":true,"family":"Kenow","given":"K.P.","affiliations":[],"preferred":false,"id":429889,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Meyer, M.W.","contributorId":38094,"corporation":false,"usgs":true,"family":"Meyer","given":"M.W.","email":"","affiliations":[],"preferred":false,"id":429890,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031127,"text":"70031127 - 2007 - A new ghost-node method for linking different models and initial investigations of heterogeneity and nonmatching grids","interactions":[],"lastModifiedDate":"2018-09-13T16:25:25","indexId":"70031127","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":664,"text":"Advances in Water Resources","active":true,"publicationSubtype":{"id":10}},"title":"A new ghost-node method for linking different models and initial investigations of heterogeneity and nonmatching grids","docAbstract":"A flexible, robust method for linking parent (regional-scale) and child (local-scale) grids of locally refined models that use different numerical methods is developed based on a new, iterative ghost-node method. Tests are presented for two-dimensional and three-dimensional pumped systems that are homogeneous or that have simple heterogeneity. The parent and child grids are simulated using the block-centered finite-difference MODFLOW and control-volume finite-element FEHM models, respectively. The models are solved iteratively through head-dependent (child model) and specified-flow (parent model) boundary conditions. Boundary conditions for models with nonmatching grids or zones of different hydraulic conductivity are derived and tested against heads and flows from analytical or globally-refined models. Results indicate that for homogeneous two- and three-dimensional models with matched grids (integer number of child cells per parent cell), the new method is nearly as accurate as the coupling of two MODFLOW models using the shared-node method and, surprisingly, errors are slightly lower for nonmatching grids (noninteger number of child cells per parent cell). For heterogeneous three-dimensional systems, this paper compares two methods for each of the two sets of boundary conditions: external heads at head-dependent boundary conditions for the child model are calculated using bilinear interpolation or a Darcy-weighted interpolation; specified-flow boundary conditions for the parent model are calculated using model-grid or hydrogeologic-unit hydraulic conductivities. Results suggest that significantly more accurate heads and flows are produced when both Darcy-weighted interpolation and hydrogeologic-unit hydraulic conductivities are used, while the other methods produce larger errors at the boundary between the regional and local models. The tests suggest that, if posed correctly, the ghost-node method performs well. Additional testing is needed for highly heterogeneous systems. ?? 2007 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Advances in Water Resources","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.advwatres.2007.01.004","issn":"03091708","usgsCitation":"Dickinson, J., James, S., Mehl, S., Hill, M.C., Leake, S.A., Zyvoloski, G., Faunt, C., and Eddebbarh, A., 2007, A new ghost-node method for linking different models and initial investigations of heterogeneity and nonmatching grids: Advances in Water Resources, v. 30, no. 8, p. 1722-1736, https://doi.org/10.1016/j.advwatres.2007.01.004.","startPage":"1722","endPage":"1736","numberOfPages":"15","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":238616,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211342,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.advwatres.2007.01.004"}],"volume":"30","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e4a2e4b0c8380cd467b5","contributors":{"authors":[{"text":"Dickinson, J.E.","contributorId":28790,"corporation":false,"usgs":true,"family":"Dickinson","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":430156,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"James, S.C.","contributorId":103059,"corporation":false,"usgs":true,"family":"James","given":"S.C.","email":"","affiliations":[],"preferred":false,"id":430160,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mehl, S.","contributorId":20114,"corporation":false,"usgs":true,"family":"Mehl","given":"S.","affiliations":[],"preferred":false,"id":430154,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hill, M. C.","contributorId":48993,"corporation":false,"usgs":true,"family":"Hill","given":"M.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":430157,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Leake, S. A.","contributorId":52164,"corporation":false,"usgs":true,"family":"Leake","given":"S.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":430158,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Zyvoloski, G.A.","contributorId":20123,"corporation":false,"usgs":true,"family":"Zyvoloski","given":"G.A.","email":"","affiliations":[],"preferred":false,"id":430155,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"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":430161,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Eddebbarh, A.-A.","contributorId":101425,"corporation":false,"usgs":true,"family":"Eddebbarh","given":"A.-A.","email":"","affiliations":[],"preferred":false,"id":430159,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70031526,"text":"70031526 - 2007 - A simple pore water hydrogen diffusion syringe sampler","interactions":[],"lastModifiedDate":"2018-10-16T09:32:52","indexId":"70031526","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"A simple pore water hydrogen diffusion syringe sampler","docAbstract":"<p>Molecular hydrogen (H2) is an important intermediate product and electron donor in microbial metabolism. Concentrations of dissolved H 2 are often diagnostic of the predominant terminal electron-accepting processes in ground water systems or aquatic sediments. H2 concentrations are routinely measured in ground water monitoring wells but are rarely measured in saturated aquatic sediments due to a lack of simple and practical sampling methods. This report describes the design and development (including laboratory and field testing) of a simple, syringe-based H 2 sampler in (1) saturated, riparian sediments, (2) surface water bed sediments, and (3) packed intervals of a fractured bedrock borehole that are inaccessible by standard pumped methods.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1745-6584.2007.00362.x","issn":"0017467X","usgsCitation":"Vroblesky, D., Chapelle, F.H., and Bradley, P.M., 2007, A simple pore water hydrogen diffusion syringe sampler: Ground Water, v. 45, no. 6, p. 798-802, https://doi.org/10.1111/j.1745-6584.2007.00362.x.","productDescription":"5 p.","startPage":"798","endPage":"802","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240033,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212536,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6584.2007.00362.x"}],"volume":"45","issue":"6","noUsgsAuthors":false,"publicationDate":"2007-08-09","publicationStatus":"PW","scienceBaseUri":"5059e591e4b0c8380cd46e2b","contributors":{"authors":[{"text":"Vroblesky, Don vroblesk@usgs.gov","contributorId":207411,"corporation":false,"usgs":true,"family":"Vroblesky","given":"Don","email":"vroblesk@usgs.gov","affiliations":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"preferred":true,"id":431958,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chapelle, Francis H. chapelle@usgs.gov","contributorId":1350,"corporation":false,"usgs":true,"family":"Chapelle","given":"Francis","email":"chapelle@usgs.gov","middleInitial":"H.","affiliations":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true},{"id":559,"text":"South Carolina Water Science Center","active":true,"usgs":true}],"preferred":true,"id":431959,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bradley, Paul M. 0000-0001-7522-8606 pbradley@usgs.gov","orcid":"https://orcid.org/0000-0001-7522-8606","contributorId":361,"corporation":false,"usgs":true,"family":"Bradley","given":"Paul","email":"pbradley@usgs.gov","middleInitial":"M.","affiliations":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"preferred":true,"id":431957,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031527,"text":"70031527 - 2007 - Evaluation of a non-point source pollution model, AnnAGNPS, in a tropical watershed","interactions":[],"lastModifiedDate":"2012-03-12T17:21:14","indexId":"70031527","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1551,"text":"Environmental Modelling and Software","active":true,"publicationSubtype":{"id":10}},"title":"Evaluation of a non-point source pollution model, AnnAGNPS, in a tropical watershed","docAbstract":"Impaired water quality caused by human activity and the spread of invasive plant and animal species has been identified as a major factor of degradation of coastal ecosystems in the tropics. The main goal of this study was to evaluate the performance of AnnAGNPS (Annualized Non-Point Source Pollution Model), in simulating runoff and soil erosion in a 48 km2 watershed located on the Island of Kauai, Hawaii. The model was calibrated and validated using 2 years of observed stream flow and sediment load data. Alternative scenarios of spatial rainfall distribution and canopy interception were evaluated. Monthly runoff volumes predicted by AnnAGNPS compared well with the measured data (R2 = 0.90, P < 0.05); however, up to 60% difference between the actual and simulated runoff were observed during the driest months (May and July). Prediction of daily runoff was less accurate (R2 = 0.55, P < 0.05). Predicted and observed sediment yield on a daily basis was poorly correlated (R2 = 0.5, P < 0.05). For the events of small magnitude, the model generally overestimated sediment yield, while the opposite was true for larger events. Total monthly sediment yield varied within 50% of the observed values, except for May 2004. Among the input parameters the model was most sensitive to the values of ground residue cover and canopy cover. It was found that approximately one third of the watershed area had low sediment yield (0-1 t ha-1 y-1), and presented limited erosion threat. However, 5% of the area had sediment yields in excess of 5 t ha-1 y-1. Overall, the model performed reasonably well, and it can be used as a management tool on tropical watersheds to estimate and compare sediment loads, and identify \"hot spots\" on the landscape. ?? 2007 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Modelling and Software","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.envsoft.2006.12.001","issn":"13648152","usgsCitation":"Polyakov, V., Fares, A., Kubo, D., Jacobi, J., and Smith, C., 2007, Evaluation of a non-point source pollution model, AnnAGNPS, in a tropical watershed: Environmental Modelling and Software, v. 22, no. 11, p. 1617-1627, https://doi.org/10.1016/j.envsoft.2006.12.001.","startPage":"1617","endPage":"1627","numberOfPages":"11","costCenters":[],"links":[{"id":212537,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.envsoft.2006.12.001"},{"id":240034,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"22","issue":"11","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0c34e4b0c8380cd52a90","contributors":{"authors":[{"text":"Polyakov, V.","contributorId":96900,"corporation":false,"usgs":true,"family":"Polyakov","given":"V.","email":"","affiliations":[],"preferred":false,"id":431963,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fares, A.","contributorId":12697,"corporation":false,"usgs":true,"family":"Fares","given":"A.","email":"","affiliations":[],"preferred":false,"id":431960,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kubo, D.","contributorId":52401,"corporation":false,"usgs":true,"family":"Kubo","given":"D.","email":"","affiliations":[],"preferred":false,"id":431961,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jacobi, J.","contributorId":97321,"corporation":false,"usgs":true,"family":"Jacobi","given":"J.","email":"","affiliations":[],"preferred":false,"id":431964,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Smith, C.","contributorId":96429,"corporation":false,"usgs":true,"family":"Smith","given":"C.","affiliations":[],"preferred":false,"id":431962,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031536,"text":"70031536 - 2007 - Fracture control of ground water flow and water chemistry in a rock aquitard","interactions":[],"lastModifiedDate":"2012-03-12T17:21:12","indexId":"70031536","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Fracture control of ground water flow and water chemistry in a rock aquitard","docAbstract":"There are few studies on the hydrogeology of sedimentary rock aquitards although they are important controls in regional ground water flow systems. We formulate and test a three-dimensional (3D) conceptual model of ground water flow and hydrochemistry in a fractured sedimentary rock aquitard to show that flow dynamics within the aquitard are more complex than previously believed. Similar conceptual models, based on regional observations and recently emerging principles of mechanical stratigraphy in heterogeneous sedimentary rocks, have previously been applied only to aquifers, but we show that they are potentially applicable to aquitards. The major elements of this conceptual model, which is based on detailed information from two sites in the Maquoketa Formation in southeastern Wisconsin, include orders of magnitude contrast between hydraulic diffusivity (K/Ss) of fractured zones and relatively intact aquitard rock matrix, laterally extensive bedding-plane fracture zones extending over distances of over 10 km, very low vertical hydraulic conductivity of thick shale-rich intervals of the aquitard, and a vertical hydraulic head profile controlled by a lateral boundary at the aquitard subcrop, where numerous surface water bodies dominate the shallow aquifer system. Results from a 3D numerical flow model based on this conceptual model are consistent with field observations, which did not fit the typical conceptual model of strictly vertical flow through an aquitard. The 3D flow through an aquitard has implications for predicting ground water flow and for planning and protecting water supplies. ?? 2007 National Ground Water Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1745-6584.2007.00335.x","issn":"0017467X","usgsCitation":"Eaton, T., Anderson, M.P., and Bradbury, K.R., 2007, Fracture control of ground water flow and water chemistry in a rock aquitard: Ground Water, v. 45, no. 5, p. 601-615, https://doi.org/10.1111/j.1745-6584.2007.00335.x.","startPage":"601","endPage":"615","numberOfPages":"15","costCenters":[],"links":[{"id":212179,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6584.2007.00335.x"},{"id":239629,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a13aee4b0c8380cd5473b","contributors":{"authors":[{"text":"Eaton, T.T.","contributorId":90536,"corporation":false,"usgs":true,"family":"Eaton","given":"T.T.","email":"","affiliations":[],"preferred":false,"id":431994,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Anderson, Marilyn P.","contributorId":102970,"corporation":false,"usgs":true,"family":"Anderson","given":"Marilyn","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":431995,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bradbury, K. R.","contributorId":86070,"corporation":false,"usgs":true,"family":"Bradbury","given":"K.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":431993,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031594,"text":"70031594 - 2007 - Population density, biomass, and age-class structure of the invasive clam Corbicula fluminea in rivers of the lower San Joaquin River watershed, California","interactions":[],"lastModifiedDate":"2023-07-05T12:17:18.464508","indexId":"70031594","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3746,"text":"Western North American Naturalist","onlineIssn":"1944-8341","printIssn":"1527-0904","active":true,"publicationSubtype":{"id":10}},"title":"Population density, biomass, and age-class structure of the invasive clam Corbicula fluminea in rivers of the lower San Joaquin River watershed, California","docAbstract":"<p><i>Corbicula fluminea</i><span>&nbsp;is well known as an invasive filter-feeding freshwater bivalve with a variety of effects on ecosystem processes. However,&nbsp;</span><i>C. fluminea</i><span>&nbsp;has been relatively unstudied in the rivers of the western United States. In June 2003, we sampled&nbsp;</span><i>C. fluminea</i><span>&nbsp;at 16 sites in the San Joaquin River watershed of California, which was invaded by&nbsp;</span><i>C. fluminea</i><span>&nbsp;in the 1940s.&nbsp;</span><i>Corbicula fluminea</i><span>&nbsp;was common in 2 tributaries to the San Joaquin River, reaching densities of 200 clams · m</span><sup>−2</sup><span>, but was rare in the San Joaquin River. Biomass followed a similar pattern. Clams of the same age were shorter in the San Joaquin River than in the tributaries. Distribution of clams was different in the 2 tributaries, but the causes of the difference are unknown. The low density and biomass of clams in the San Joaquin River was likely due to stressful habitat or to water quality, because food was abundant. The success of&nbsp;</span><i>C. fluminea</i><span>&nbsp;invasions and subsequent effects on trophic processes likely depends on multiple factors. As&nbsp;</span><i>C. fluminea</i><span>&nbsp;continues to expand its range around the world, questions regarding invasion success and effects on ecosystems will become important in a wide array of environmental settings.</span></p>","language":"English","publisher":"BioOne","doi":"10.3398/1527-0904(2007)67[572:PDBAAS]2.0.CO;2","issn":"15270904","usgsCitation":"Brown, L.R., Thompson, J.K., Higgins, K., and Lucas, L.V., 2007, Population density, biomass, and age-class structure of the invasive clam Corbicula fluminea in rivers of the lower San Joaquin River watershed, California: Western North American Naturalist, v. 67, no. 4, p. 572-586, https://doi.org/10.3398/1527-0904(2007)67[572:PDBAAS]2.0.CO;2.","productDescription":"15 p.","startPage":"572","endPage":"586","numberOfPages":"15","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":489791,"rank":2,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://scholarsarchive.byu.edu/wnan/vol67/iss4/10","text":"External Repository"},{"id":240074,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"San Joaquin River Watershed","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -122.41195439667275,\n              38.415598404027605\n            ],\n            [\n              -122.41195439667275,\n              37.69791363010357\n            ],\n            [\n              -121.25888467133896,\n              37.69791363010357\n            ],\n            [\n              -121.25888467133896,\n              38.415598404027605\n            ],\n            [\n              -122.41195439667275,\n              38.415598404027605\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"67","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7d3be4b0c8380cd79e1b","contributors":{"authors":[{"text":"Brown, Larry R. 0000-0001-6702-4531 lrbrown@usgs.gov","orcid":"https://orcid.org/0000-0001-6702-4531","contributorId":1717,"corporation":false,"usgs":true,"family":"Brown","given":"Larry","email":"lrbrown@usgs.gov","middleInitial":"R.","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":true,"id":432254,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Thompson, Janet K. 0000-0002-1528-8452 jthompso@usgs.gov","orcid":"https://orcid.org/0000-0002-1528-8452","contributorId":1009,"corporation":false,"usgs":true,"family":"Thompson","given":"Janet","email":"jthompso@usgs.gov","middleInitial":"K.","affiliations":[{"id":36183,"text":"Hydro-Ecological Interactions Branch","active":true,"usgs":true},{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":432255,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Higgins, K.","contributorId":32734,"corporation":false,"usgs":true,"family":"Higgins","given":"K.","affiliations":[],"preferred":false,"id":432252,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lucas, Lisa V.","contributorId":80992,"corporation":false,"usgs":true,"family":"Lucas","given":"Lisa","email":"","middleInitial":"V.","affiliations":[],"preferred":false,"id":432253,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
]}