Two nonlinear models were developed at the national scale to (1) predict contamination of shallow ground water (typically < 5 m deep) by nitrate from nonpoint sources and (2) to predict ambient nitrate concentration in deeper supplies used for drinking. The new models have several advantages over previous national-scale approaches. First, they predict nitrate concentration (rather than probability of occurrence), which can be directly compared with water-quality criteria. Second, the models share a mechanistic structure that segregates nitrogen (N) sources and physical factors that enhance or restrict nitrate transport and accumulation in ground water. Finally, data were spatially averaged to minimize small-scale variability so that the large-scale influences of N loading, climate, and aquifer characteristics could more readily be identified. Results indicate that areas with high N application, high water input, well-drained soils, fractured rocks or those with high effective porosity, and lack of attenuation processes have the highest predicted nitrate concentration. The shallow groundwater model (mean square error or MSE = 2.96) yielded a coefficient of determination (R2) of 0.801, indicating that much of the variation in nitrate concentration is explained by the model. Moderate to severe nitrate contamination is predicted to occur in the High Plains, northern Midwest, and selected other areas. The drinking-water model performed comparably (MSE = 2.00, R2 = 0.767) and predicts that the number of users on private wells and residing in moderately contaminated areas (>5 to ≤10 mg/L nitrate) decreases by 12% when simulation depth increases from 10 to 50 m.
","language":"English","publisher":"ACS Publications","doi":"10.1021/es060911u","usgsCitation":"Nolan, B.T., and Hitt, K.J., 2006, Vulnerability of shallow groundwater and drinking-water wells to nitrate in the United States: Environmental Science & Technology, v. 40, no. 24, p. 7834-7840, https://doi.org/10.1021/es060911u.","productDescription":"7 p.; Metadata","startPage":"7834","endPage":"7840","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":273792,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-s_ffer.xml","linkHelpText":"Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for farm fertilizer (gwava-s_ffer)"},{"id":273791,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-s_ddit.xml","linkHelpText":"Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for drainage ditch (gwava-s_ddit)"},{"id":273790,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-s_crpa.xml","linkHelpText":"Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for cropland/pasture/fallow (gwava-s_crpa)"},{"id":273789,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-s_crox.xml","linkHelpText":"Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for carbonate rocks (gwava-s_crox)"},{"id":273788,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-s_conf.xml","linkHelpText":"Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for confined manure (gwava-s_conf)"},{"id":273785,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-dw_twre.xml","linkHelpText":"Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for irrigation tailwater recovery (gwava-dw_twre)"},{"id":273784,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-dw_swus.xml","linkHelpText":"Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for fresh surface water withdrawal (gwava-dw_swus)"},{"id":273783,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-dw_sscb.xml","linkHelpText":"Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for sandstone and carbonate rocks (gwava-dw_sscb)"},{"id":273782,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-dw_semc.xml","linkHelpText":"Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for semiconsolidated sand aquifers (gwava-dw_semc)"},{"id":273773,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":273796,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-s_out.xml","linkHelpText":"Model of predicted nitrate concentration in shallow, recently recharged ground water -- Model output data set (gwava-s_out)"},{"id":273797,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-s_popd.xml","linkHelpText":"Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for population density (gwava-s_popd)"},{"id":273798,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-s_slop.xml","linkHelpText":"Model of predicted nitrate concentration in shallow, recently recharged ground 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(gwava-s_clay)"},{"id":273800,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-s_twre.xml","linkHelpText":"Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for irrigation tailwater recovery (gwava-s_twre)"},{"id":273801,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-s_vrox.xml","linkHelpText":"Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for basalt and volcanic rocks (gwava-s_vrox)"},{"id":273802,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-s_wetl.xml","linkHelpText":"Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for wetlands (gwava-s_wetl)"},{"id":273803,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-s_wtin.xml","linkHelpText":"Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for water input (gwava-s_wtin)"},{"id":273772,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-dw_conf.xml","linkHelpText":"Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for confined manure (gwava-dw_conf)"},{"id":273776,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-dw_ffer.xml","linkHelpText":"Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for farmfertilizer (gwava-dw_ffer)"},{"id":273777,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-dw_gtil.xml","linkHelpText":"Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for glacial till (gwava-dw_gtil)"},{"id":273778,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-dw_hor.xml","linkHelpText":"Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for Hortonian overland flow (gwava-dw_hor)"},{"id":273774,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-dw_ddit.xml","linkHelpText":"Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for drainageditch (gwava-dw_ddit)"},{"id":273775,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-dw_dun.xml","linkHelpText":"Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for Dunne overland flow (gwava-dw_dun)"},{"id":273779,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-dw_orvi.xml","linkHelpText":"Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for orchards/vineyards (gwava-dw_orvi)"},{"id":273780,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-dw_out.xml","linkHelpText":"Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Model output data set (gwava-dw_out)"},{"id":273781,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-dw_popd.xml","linkHelpText":"Model of predicted nitrate concentration in U.S. ground water used for drinking (simulation depth 50 meters) -- Input data set for population density (gwava-dw_popd)"},{"id":273795,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-s_orvi.xml","linkHelpText":"Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for orchards/vineyards (gwava-s_orvi)"},{"id":273793,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-s_gtil.xml","linkHelpText":"Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for glacial till (gwava-s_gtil)"},{"id":273794,"type":{"id":16,"text":"Metadata"},"url":"https://water.usgs.gov/GIS/metadata/usgswrd/XML/gwava-s_hist.xml","linkHelpText":"Model of predicted nitrate concentration in shallow, recently recharged ground water -- Input data set for histosols (gwava-s_hist)"}],"country":"United States","volume":"40","issue":"24","noUsgsAuthors":false,"publicationDate":"2006-10-27","publicationStatus":"PW","scienceBaseUri":"51c02ff9e4b0ee1529ed3d83","contributors":{"authors":[{"text":"Nolan, Bernard T. 0000-0002-6945-9659 btnolan@usgs.gov","orcid":"https://orcid.org/0000-0002-6945-9659","contributorId":2190,"corporation":false,"usgs":true,"family":"Nolan","given":"Bernard","email":"btnolan@usgs.gov","middleInitial":"T.","affiliations":[{"id":451,"text":"National Water Quality Assessment Program","active":true,"usgs":true},{"id":27111,"text":"National Water Quality Program","active":true,"usgs":true}],"preferred":true,"id":479875,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hitt, Kerie J.","contributorId":54565,"corporation":false,"usgs":true,"family":"Hitt","given":"Kerie","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":479876,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70045419,"text":"70045419 - 2006 - Michigan Water Year 2005","interactions":[],"lastModifiedDate":"2013-07-09T10:51:50","indexId":"70045419","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":6,"text":"USGS Unnumbered Series"},"seriesTitle":{"id":389,"text":"Water Resources Data","active":false,"publicationSubtype":{"id":6}},"seriesNumber":"MI-05-1","title":"Michigan Water Year 2005","docAbstract":"This volume of the annual hydrologic data report of Michigan is one of a series of annual reports that document hydrologic data gathered from the U.S. Geological Survey's surface- and ground-water data-collection networks in each state, Puerto Rico, and the Trust Territories. These records of streamflow, ground-water levels, and quality of water provide the hydrologic information needed by State, local, and Federal agencies, and the private sector for developing and managing our Nation's land and water resources.","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Lansing, MI","doi":"10.3133/70045419","collaboration":"Prepared in cooperation with the State of Michigan and with other agencies","usgsCitation":"Blumer, S.P., Whited, C., Ellis, J., Minnerick, R., and LeuVoy, R., 2006, Michigan Water Year 2005: Water Resources Data MI-05-1, xviii, 554 p., https://doi.org/10.3133/70045419.","productDescription":"xviii, 554 p.","numberOfPages":"594","additionalOnlineFiles":"N","temporalStart":"2004-10-01","temporalEnd":"2005-09-30","costCenters":[{"id":382,"text":"Michigan Water Science Center","active":true,"usgs":true}],"links":[{"id":270942,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/unnumbered/70045417/report-thumb.jpg"},{"id":272727,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/unnumbered/70045417/report.pdf"}],"country":"United States","state":"Michigan","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -90.516667,41.683333 ], [ -90.516667,48.250000 ], [ -82.433333,48.250000 ], [ -82.433333,41.683333 ], [ -90.516667,41.683333 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"516d216ce4b0411d430a8a2d","contributors":{"authors":[{"text":"Blumer, S. P.","contributorId":23938,"corporation":false,"usgs":true,"family":"Blumer","given":"S.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":477471,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Whited, C.R.","contributorId":49387,"corporation":false,"usgs":true,"family":"Whited","given":"C.R.","email":"","affiliations":[],"preferred":false,"id":477473,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ellis, J.M.","contributorId":29502,"corporation":false,"usgs":true,"family":"Ellis","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":477472,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Minnerick, R. J.","contributorId":52255,"corporation":false,"usgs":true,"family":"Minnerick","given":"R. J.","affiliations":[],"preferred":false,"id":477474,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"LeuVoy, R.L.","contributorId":56706,"corporation":false,"usgs":true,"family":"LeuVoy","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":477475,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70184339,"text":"70184339 - 2006 - Reply to comment on ‘Characterization of surface and ground water δ18O seasonal variation and its use for estimating groundwater residence times’ by R. E. Criss and W. E. Winston","interactions":[],"lastModifiedDate":"2017-03-07T15:25:10","indexId":"70184339","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1924,"text":"Hydrological Processes","active":true,"publicationSubtype":{"id":10}},"title":"Reply to comment on ‘Characterization of surface and ground water δ18O seasonal variation and its use for estimating groundwater residence times’ by R. E. Criss and W. E. Winston","docAbstract":"No abstract available
","language":"English","publisher":"Wiley","doi":"10.1002/hyp.6516","usgsCitation":"Reddy, M.M., Schuster, P., Kendall, C., and Reddy, M.B., 2006, Reply to comment on ‘Characterization of surface and ground water δ18O seasonal variation and its use for estimating groundwater residence times’ by R. E. Criss and W. E. Winston: Hydrological Processes, v. 20, no. 16, p. 3573-3578, https://doi.org/10.1002/hyp.6516.","productDescription":"6 p. ","startPage":"3573","endPage":"3578","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":336964,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"20","issue":"16","noUsgsAuthors":false,"publicationDate":"2006-09-04","publicationStatus":"PW","scienceBaseUri":"58bfd4ffe4b014cc3a3ba532","contributors":{"authors":[{"text":"Reddy, Michael M. mmreddy@usgs.gov","contributorId":684,"corporation":false,"usgs":true,"family":"Reddy","given":"Michael","email":"mmreddy@usgs.gov","middleInitial":"M.","affiliations":[{"id":145,"text":"Branch of Regional Research-Central Region","active":false,"usgs":true}],"preferred":true,"id":681052,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schuster, Paul","contributorId":80542,"corporation":false,"usgs":true,"family":"Schuster","given":"Paul","affiliations":[],"preferred":false,"id":681053,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kendall, Carol 0000-0002-0247-3405 ckendall@usgs.gov","orcid":"https://orcid.org/0000-0002-0247-3405","contributorId":1462,"corporation":false,"usgs":true,"family":"Kendall","given":"Carol","email":"ckendall@usgs.gov","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":681054,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Reddy, Micaela B.","contributorId":7947,"corporation":false,"usgs":true,"family":"Reddy","given":"Micaela","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":681055,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70190526,"text":"70190526 - 2006 - The role of fire refugia in the distribution of Pinus sabiniana (Pinaceae) in the southern Sierra Nevada","interactions":[],"lastModifiedDate":"2017-09-06T13:41:24","indexId":"70190526","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2639,"text":"Madroño","active":true,"publicationSubtype":{"id":10}},"displayTitle":"The role of fire refugia in the distribution of Pinus sabiniana (Pinaceae) in the southern Sierra Nevada","title":"The role of fire refugia in the distribution of Pinus sabiniana (Pinaceae) in the southern Sierra Nevada","docAbstract":"Although widespread throughout the interior foothills of central and northern California, Pinus sabiniana Dougl. has a disjunct distribution in the southern Sierra Nevada, where it is abundant in the Kern River and Tule River watersheds, but is absent from the Kaweah River watershed between 36° and 37°N. This gap in the pine's distribution has long intrigued botanists and ecologists and has elicited a number of hypotheses for this anomalous biogeographical pattern. Here we propose a new hypothesis that couples unique features of the southern Sierra Nevada topography with unique features of P. sabiniana's response to fire. This low elevation pine is widely distributed in grassland and chaparral, and where it occurs with the latter vegetation, it is extremely vulnerable to high intensity wildfires. Under these conditions, meta-populations persist over time in refugia in riparian areas and during fire-free intervals expand outwards re-colonizing shrubland dominated slopes. The lack of such refugia in the very steep and narrow Kaweah drainage is hypothesized to explain the absence of this pine in that area. To test this hypothesis, we studied the age-structure of P. sabinianain the area of the 2002 McNally Fire in the Kern drainage to compare age distributions of trees and tree skeletons along a gradient up slope away from riparian zones. Maximum age declined significantly with distance from riparian areas, suggesting that past fires have eliminated P. sabinianafrom the slopes and that the pines have re-colonized during fire-free intervals. The relationship was strongest when our data were restricted to areas that had a previously recorded fire. We also found that the riparian areas in the Kern drainage were significantly wider than those in Kaweah drainage, suggesting that fewer such fire refugia exist in the latter watershed, and providing an explanation for the lack of P. sabiniana between 36° and 37°.
","language":"English","publisher":"California Botanical Society","doi":"10.3120/0024-9637(2006)53[364:TROFRI]2.0.CO;2","usgsCitation":"Schwilk, D.W., and Keeley, J.E., 2006, The role of fire refugia in the distribution of Pinus sabiniana (Pinaceae) in the southern Sierra Nevada: Madroño, v. 53, no. 4, p. 364-372, https://doi.org/10.3120/0024-9637(2006)53[364:TROFRI]2.0.CO;2.","productDescription":"9 p.","startPage":"364","endPage":"372","costCenters":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"links":[{"id":477603,"rank":0,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://www.biodiversitylibrary.org/part/168982","text":"External Repository"},{"id":345495,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Sierra Nevada","volume":"53","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"59b10937e4b020cdf7d8da1b","contributors":{"authors":[{"text":"Schwilk, Dylan W.","contributorId":103883,"corporation":false,"usgs":true,"family":"Schwilk","given":"Dylan","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":709642,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Keeley, Jon E. 0000-0002-4564-6521 jon_keeley@usgs.gov","orcid":"https://orcid.org/0000-0002-4564-6521","contributorId":1268,"corporation":false,"usgs":true,"family":"Keeley","given":"Jon","email":"jon_keeley@usgs.gov","middleInitial":"E.","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":709643,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70188286,"text":"70188286 - 2006 - Tracermodel1- Excel workbook for calculation and presentation of environmental tracer data for simple groundwater mixtures: Use of chlorofluorocarbons in hydrology - a guidebook; Section III.10.3","interactions":[],"lastModifiedDate":"2017-06-05T13:56:15","indexId":"70188286","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":9,"text":"Other Report"},"title":"Tracermodel1- Excel workbook for calculation and presentation of environmental tracer data for simple groundwater mixtures: Use of chlorofluorocarbons in hydrology - a guidebook; Section III.10.3","docAbstract":"Atmospheric environmental tracers commonly used to date groundwater on timescales of years to decades include CFC-11, CFC-12, CFC-113, SF6, 85Kr, 3 H and 3 H/3 H0 , where 3 H0 refers to initial tritium (3 H + tritiogenic 3 He) (Cook and Herczeg, 2000). Interpretation of age from environmental tracer data may be relatively simple for a water sample with a single age, but the interpretation is more complex for a sample that is a mixture of waters of varying ages. A mixture can be a natural result of convergence of flow lines to a discharge area such as a spring or stream, or it can be an artefact of sampling a long-screen well. TRACERMODEL1 contains a worksheet that can be used to determine hypothetical concentrations of atmospheric environmental tracers in water samples with several different age distributions. It is designed to permit plotting of ages and tracer concentrations in a variety of different combinations to facilitate interpretation of measurements. TRACERMODEL1 includes several different types of graphs that are linked to the calculations. The spreadsheet and accompanying graphs can be modified for specific applications. For example, the selection of atmospheric environmental tracers can be changed to reflect analytes of interest, the input tracer data can be modified to reflect local conditions or different timescales, and the analytes of interest can include other types of non-point-source contaminants, such as nitrate (Böhlke, 2002). Previous versions of this workbook have been used to evaluate field data in studies of groundwater residence time and agricultural contamination (Böhlke and Denver, 1995; Focazio et al., 1998; Katz et al., 1999; Katz et al., 2001; Plummer et al., 2001; Böhlke and Krantz, 2003; Lindsey et al., 2003).
","language":"English","publisher":"International Atomic Energy Agency","usgsCitation":"Bohlke, J., 2006, Tracermodel1- Excel workbook for calculation and presentation of environmental tracer data for simple groundwater mixtures: Use of chlorofluorocarbons in hydrology - a guidebook; Section III.10.3, 5 p.","productDescription":"5 p.","startPage":"239","endPage":"243","costCenters":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"links":[{"id":342110,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":342109,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://www-pub.iaea.org/MTCD/publications/PDF/Pub1238_web.pdf"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"59366daee4b0f6c2d0d7d64e","contributors":{"authors":[{"text":"Bohlke, J.K. 0000-0001-5693-6455 jkbohlke@usgs.gov","orcid":"https://orcid.org/0000-0001-5693-6455","contributorId":191103,"corporation":false,"usgs":true,"family":"Bohlke","given":"J.K.","email":"jkbohlke@usgs.gov","affiliations":[{"id":36183,"text":"Hydro-Ecological Interactions Branch","active":true,"usgs":true},{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true}],"preferred":true,"id":697131,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70029147,"text":"70029147 - 2006 - Influence of beaver activity on summer growth and condition of age-2 Atlantic salmon parr","interactions":[],"lastModifiedDate":"2012-03-12T17:20:55","indexId":"70029147","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","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":"Influence of beaver activity on summer growth and condition of age-2 Atlantic salmon parr","docAbstract":"The activity of beavers Castor canadensis in freshwater environments can have considerable localized impacts on the physical and biological components of riparian ecosystems. By changing the habitat of a stream, beaver dams can cause spatial variation in growth opportunity that may have direct consequences for the growth of resident fish. In a small stream in eastern Canada, we studied the effects of an ephemeral beaver pond on the growth and maturity of age-2 Atlantic salmon Salmo salar parr tagged with passive integrated transponder tags. Water temperature remained relatively uniform throughout the study site. We found very little movement of recaptured fish in the study site. Fish that were recaptured in the beaver pond displayed faster summer growth rates in both length and mass than fish that were recaptured immediately above or below the pond. We also found that parr in the pond maintained relatively high condition factors, whereas fish above and below the pond appeared to decrease in condition factor throughout the summer. In addition to growth, the maturation rates of age-2 males were higher above the dam than below. This study demonstrates the effect a beaver dam can have on individual growth rates. By influencing growth during sensitive periods, the beaver pond may also influence individual life history pathways. This information could be an important component in ecosystem models that predict the effect of beaver population dynamics on the growth of individual salmonids at the landscape scale. ?? Copyright by the American Fisheries Society 2006.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Transactions of the American Fisheries Society","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1577/T05-159.1","issn":"00028487","usgsCitation":"Sigourney, D.B., Letcher, B., and Cunjak, R., 2006, Influence of beaver activity on summer growth and condition of age-2 Atlantic salmon parr: Transactions of the American Fisheries Society, v. 135, no. 4, p. 1068-1075, https://doi.org/10.1577/T05-159.1.","startPage":"1068","endPage":"1075","numberOfPages":"8","costCenters":[],"links":[{"id":210471,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/T05-159.1"},{"id":237397,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"135","issue":"4","noUsgsAuthors":false,"publicationDate":"2011-01-09","publicationStatus":"PW","scienceBaseUri":"505a3b12e4b0c8380cd621e0","contributors":{"authors":[{"text":"Sigourney, Douglas B.","contributorId":103068,"corporation":false,"usgs":true,"family":"Sigourney","given":"Douglas","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":421521,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Letcher, B. H. 0000-0003-0191-5678","orcid":"https://orcid.org/0000-0003-0191-5678","contributorId":48132,"corporation":false,"usgs":true,"family":"Letcher","given":"B.","middleInitial":"H.","affiliations":[{"id":365,"text":"Leetown Science Center","active":true,"usgs":true}],"preferred":false,"id":421520,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Cunjak, R.A.","contributorId":106442,"corporation":false,"usgs":true,"family":"Cunjak","given":"R.A.","affiliations":[],"preferred":false,"id":421522,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70028735,"text":"70028735 - 2006 - Environmental threats to tidal-marsh vertebrates of the San Francisco Bay estuary","interactions":[],"lastModifiedDate":"2017-08-26T16:38:01","indexId":"70028735","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3489,"text":"Studies in Avian Biology","active":true,"publicationSubtype":{"id":10}},"title":"Environmental threats to tidal-marsh vertebrates of the San Francisco Bay estuary","docAbstract":"The San Francisco Bay and delta system comprises the largest estuary along the Pacific Coast of the Americas and the largest remaining area for tidal-marsh vertebrates, yet tidal marshes have been dramatically altered since the middle of the 19th century. Although recent efforts to restore ecological functions are notable, numerous threats to both endemic and widespread marsh organisms, including habitat loss, are still present. The historic extent of wetlands in the estuary included 2,200 km2 of tidal marshes, of which only 21% remain, but these tidal marshes comprise >90% of all remaining tidal marshes in California. In this paper, we present the most prominent environmental threats to tidal-marsh vertebrates including habitat loss (fragmentation, reductions in available sediment, and sea-level rise), habitat deterioration (contaminants, water quality, and human disturbance), and competitive interactions (invasive species, predation, mosquito and other vector control, and disease). We discuss these threats in light of the hundreds of proposed and ongoing projects to restore wetlands in the estuary and suggest research needs to support future decisions on restoration planning.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Studies in Avian Biology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"01979922","isbn":"0943610702; 9780943610702","usgsCitation":"Takekawa, J.Y., Woo, I., Spautz, H., Nur, N., Letitia, G.J., Malamud-Roam, K., Cully, N.J., Cohen, A., Malamud-Roam, F., and La Cruz, W., 2006, Environmental threats to tidal-marsh vertebrates of the San Francisco Bay estuary: Studies in Avian Biology, no. 32, p. 176-197.","startPage":"176","endPage":"197","numberOfPages":"22","costCenters":[],"links":[{"id":236371,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"32","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a09e9e4b0c8380cd520ee","contributors":{"editors":[{"text":"Greenberg R.Maldonado J.E.Droege S.McDonald M.V.","contributorId":128314,"corporation":true,"usgs":false,"organization":"Greenberg R.Maldonado J.E.Droege S.McDonald M.V.","id":536647,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Takekawa, John Y. 0000-0003-0217-5907 john_takekawa@usgs.gov","orcid":"https://orcid.org/0000-0003-0217-5907","contributorId":176168,"corporation":false,"usgs":true,"family":"Takekawa","given":"John","email":"john_takekawa@usgs.gov","middleInitial":"Y.","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":false,"id":419530,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Woo, I.","contributorId":45861,"corporation":false,"usgs":true,"family":"Woo","given":"I.","email":"","affiliations":[],"preferred":false,"id":419528,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Spautz, Hildie","contributorId":30803,"corporation":false,"usgs":true,"family":"Spautz","given":"Hildie","email":"","affiliations":[],"preferred":false,"id":419527,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nur, N.","contributorId":13576,"corporation":false,"usgs":true,"family":"Nur","given":"N.","email":"","affiliations":[],"preferred":false,"id":419526,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Letitia, Grenier J.","contributorId":106297,"corporation":false,"usgs":true,"family":"Letitia","given":"Grenier","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":419534,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Malamud-Roam, K.","contributorId":73801,"corporation":false,"usgs":true,"family":"Malamud-Roam","given":"K.","email":"","affiliations":[],"preferred":false,"id":419531,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Cully, Nordby J.","contributorId":9833,"corporation":false,"usgs":true,"family":"Cully","given":"Nordby","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":419525,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Cohen, A.N.","contributorId":84544,"corporation":false,"usgs":true,"family":"Cohen","given":"A.N.","email":"","affiliations":[],"preferred":false,"id":419533,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Malamud-Roam, F.","contributorId":60428,"corporation":false,"usgs":true,"family":"Malamud-Roam","given":"F.","email":"","affiliations":[],"preferred":false,"id":419529,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"La Cruz, Wainwright-De","contributorId":82632,"corporation":false,"usgs":true,"family":"La Cruz","given":"Wainwright-De","email":"","affiliations":[],"preferred":false,"id":419532,"contributorType":{"id":1,"text":"Authors"},"rank":10}]}} ,{"id":70028717,"text":"70028717 - 2006 - Sediment mineralogy based on visible and near-infrared reflectance spectroscopy","interactions":[],"lastModifiedDate":"2012-03-12T17:20:45","indexId":"70028717","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1785,"text":"Geological Society Special Publication","active":true,"publicationSubtype":{"id":10}},"title":"Sediment mineralogy based on visible and near-infrared reflectance spectroscopy","docAbstract":"Visible and near-infrared spectroscopy (VNIS) can be used to measure reflectance spectra (wavelength 350-2500 nm) for sediment cores and samples. A local ground-truth calibration of spectral features to mineral percentages is calculated by measuring reflectance spectra for a suite of samples of known mineralogy. This approach has been tested on powders, core plugs and split cores, and we conclude that it works well on all three, unless pore water is present. Initial VNIS studies have concentrated on determination of relative proportions of carbonate, opal, smectite and illite in equatorial Pacific sediments. Shipboard VNIS-based determination of these four components was demonstrated on Ocean Drilling Program Leg 199. ?? The Geological Society of London 2006.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geological Society Special Publication","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"03058719","isbn":"1862392102; 9781862392106","usgsCitation":"Jarrard, R., and Berg, V., 2006, Sediment mineralogy based on visible and near-infrared reflectance spectroscopy: Geological Society Special Publication, no. 267, p. 129-140.","startPage":"129","endPage":"140","numberOfPages":"12","costCenters":[],"links":[{"id":236611,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"267","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8999e4b08c986b316e39","contributors":{"editors":[{"text":"Rothwell R.G.","contributorId":128331,"corporation":true,"usgs":false,"organization":"Rothwell R.G.","id":536645,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Jarrard, R. D.","contributorId":58074,"corporation":false,"usgs":false,"family":"Jarrard","given":"R. D.","affiliations":[],"preferred":false,"id":419405,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Berg, Vanden","contributorId":74941,"corporation":false,"usgs":true,"family":"Berg","given":"Vanden","email":"","affiliations":[],"preferred":false,"id":419406,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":79481,"text":"ofr20061336 - 2006 - History of the Fort Collins Science Center, U.S. Geological Survey","interactions":[],"lastModifiedDate":"2016-04-25T14:08:50","indexId":"ofr20061336","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2006-1336","title":"History of the Fort Collins Science Center, U.S. Geological Survey","docAbstract":"The U.S. Geological Survey’s Fort Collins Science Center (\"the Center\") has been a nucleus of research, technology development, and associated scientific activities within the Department of the Interior for more than 30 years. The Center’s historical activities are deeply rooted in federal biological resources research and its supporting disciplines, particularly as they relate to the needs of the U.S. Department of the Interior and its resource management agencies. The organizational framework and activities of the Center have changed and adapted over the years in response to shifts in the scientific issues and challenges facing the U.S. Department of the Interior and with the development of new strategies to meet these challenges. Thus, the history of the Center has been dynamic.
\nThe Center has been nested within the U.S. Geological Survey since 1996. From 1993 to 1996 the Center was a major unit of the National Biological Service (named the National Biological Survey at its inception). This was a period of great organizational flux. During that time the Center comprised multiple field stations and science functions that prior to 1993 had been scattered among the U.S. Bureau of Land Management, the U.S. Bureau of Reclamation, the National Park Service, and the U.S. Fish and Wildlife Service. In 1993, certain biological research components of these agencies were assigned to join with the National Ecology Research Center, formerly one of the major research and development hubs of the U.S. Fish and Wildlife Service. This was the year when biological resources research in the U.S. Department of the Interior was consolidated by the Secretary of the Interior, who in an April 1993 memo explaining his intentions wrote, \"Our Department has, without doubt, the best biologists in the world.\" Soon after formation of the new agency, the Center was re-named the Midcontinent Ecological Science Center, reflecting its geographic location within the new Midcontinent administrative region of the National Biological Service (the other three original administrative regions were the eastern, western, and southern). The change in name to the Fort Collins Science Center took place in 2002, soon after the center moved to new facilities on the Colorado State University Natural Resources Research Campus.
\nAt various times during the period when it was part of the National Biological Service (1993–96), the Center served as the administrative and programmatic home base for a wide number of science activities in numerous Western states (table 1). This reflected the previous fragmentation of biological and related science efforts across resource management agencies in the U.S. Department of the Interior. The organization of the 2 Center within the National Biological Service was a manifestation of the desire of the Secretary of the Interior to consolidate its biological science activities in administratively independent entities that would ensure that the science retained its objectivity. Congress later recognized the need to maintain a hierarchical independence between biological science and resource management in the Department. However, Congress also saw that the U.S. Geological Survey, with its long history of objective science support to the nation in geology, water resources, geography, and remote sensing, was a suitable alternative home for these biological science functions. Thus, in 1996 Congress transferred the biological resources functions of the National Biological Service to the U.S. Geological Survey. Detailed overviews and opinions about the history and policy issues surrounding the formation and subsequent fate of the National Biological Service can be found elsewhere (for example Cohn, 1993, 2005; Kaufman, 1993; Kreeger, 1994; Pulliam, 1995, 1998a,b; Reichhardt, 1994; Wagner, 1999)
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20061336","usgsCitation":"O'Shea, T., 2006, History of the Fort Collins Science Center, U.S. Geological Survey: U.S. Geological Survey Open-File Report 2006-1336, iii, 27 p., https://doi.org/10.3133/ofr20061336.","productDescription":"iii, 27 p.","numberOfPages":"30","onlineOnly":"Y","additionalOnlineFiles":"N","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":194581,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20061336.PNG"},{"id":320224,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2006/1336/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a54e4b07f02db62bfed","contributors":{"authors":[{"text":"O'Shea, Thomas J. (compiler)","contributorId":61117,"corporation":false,"usgs":true,"family":"O'Shea","given":"Thomas J. (compiler)","affiliations":[],"preferred":false,"id":290014,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":76778,"text":"ofr20061093 - 2006 - Users' manual for the Hydroecological Integrity Assessment Process software (including the New Jersey Assessment Tools)","interactions":[],"lastModifiedDate":"2016-04-25T14:53:50","indexId":"ofr20061093","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2006-1093","title":"Users' manual for the Hydroecological Integrity Assessment Process software (including the New Jersey Assessment Tools)","docAbstract":"This manual is a user’s guide to four computer software tools that have been developed for the Hydroecological Integrity Assessment Process. The Hydroecological Integrity Assessment Process recognizes that streamflow is strongly related to many critical physiochemical components of rivers, such as dissolved oxygen, channel geomorphology, and water temperature, and can be considered a “master variable” that limits the disturbance, abundance, and diversity of many aquatic plant and animal species.
\nApplying the Hydroecological Integrity Assessment Process involves four steps: (1) a hydrologic classification of relatively unmodified streams in a geographic area using long-term gage records and 171 ecologically relevant indices; (2) the identification of statistically significant, nonredundant, hydroecologically relevant indices associated with the five major flow components for each stream class; and (3) the development of a stream-classification tool and a hydrologic assessment tool. Four computer software tools have been developed.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20061093","usgsCitation":"Henriksen, J.A., Heasley, J., Kennen, J., and Nieswand, S., 2006, Users' manual for the Hydroecological Integrity Assessment Process software (including the New Jersey Assessment Tools): U.S. Geological Survey Open-File Report 2006-1093, viii, 72 p., https://doi.org/10.3133/ofr20061093.","productDescription":"viii, 72 p.","numberOfPages":"80","onlineOnly":"N","additionalOnlineFiles":"Y","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":192305,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20061093.PNG"},{"id":320240,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2006/1093/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ac7e4b07f02db67adea","contributors":{"authors":[{"text":"Henriksen, James A.","contributorId":89985,"corporation":false,"usgs":true,"family":"Henriksen","given":"James","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":287883,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Heasley, John","contributorId":57004,"corporation":false,"usgs":true,"family":"Heasley","given":"John","email":"","affiliations":[],"preferred":false,"id":287882,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kennen, Jonathan G. 0000-0002-5426-4445 jgkennen@usgs.gov","orcid":"https://orcid.org/0000-0002-5426-4445","contributorId":574,"corporation":false,"usgs":true,"family":"Kennen","given":"Jonathan G.","email":"jgkennen@usgs.gov","affiliations":[{"id":470,"text":"New Jersey Water Science Center","active":true,"usgs":true}],"preferred":true,"id":287880,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nieswand, Steven","contributorId":34212,"corporation":false,"usgs":true,"family":"Nieswand","given":"Steven","affiliations":[],"preferred":false,"id":287881,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":79482,"text":"ofr20061267 - 2006 - 2005 annual progress report: Elk and bison grazing ecology in the Great Sand Dunes complex of lands","interactions":[],"lastModifiedDate":"2016-04-25T14:15:45","indexId":"ofr20061267","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2006-1267","title":"2005 annual progress report: Elk and bison grazing ecology in the Great Sand Dunes complex of lands","docAbstract":"In 2000 the U.S. Congress authorized the expansion of the former Great Sand Dunes National Monument by establishing a new Great Sand Dunes National Park and Preserve in its place, and establishing the Baca National Wildlife Refuge. The establishment of Great Sand Dunes National Park and Preserve and the new Baca National Wildlife Refuge in the San Luis Valley (SLV), Colorado was one of the most significant land conservation actions in the western U.S. in recent years. The action was a result of cooperation between the National Park Service (NPS), U.S. Fish and Wildlife Service (USFWS), Bureau of Land Management (BLM), U.S. Forest Service (USDA-FS), and The Nature Conservancy (TNC). The new national park, when fully implemented, will consist of 107,265 acres, the new national preserve 41,872 acres, and the new national wildlife refuge (USFWS lands) 92,180 acres (fig. 1). The area encompassed by this designation protects a number of natural wonders and features including a unique ecosystem of natural sand dunes, the entire watershed of surface and groundwaters that are necessary to preserve and recharge the dunes and adjacent wetlands, a unique stunted forest, and other valuable riparian vegetation communities that support a host of associated wildlife and bird species.
\nWhen the National Park was initially established, there were concerns about overconcentrations and impacts on native plant communities of the unhunted segments of a large and possibly growing elk (Cervus elaphus) population. This led to the designation of the Preserve as a compromise solution, where the elk could be harvested. The Preserve Unit, however, will not address all the ungulate management challenges. In order to reduce the current elk population, harvests of elk may need to be aggressive. But aggressive special hunts of elk to achieve population reductions can result in elk avoidance of certain areas or elk seeking refuge in areas where they cannot be hunted, while removals of whole herd segments and abandonment or alterations of migration routes can occur (Smith and Robbins, 1994; Boyce and others, 1991). Elk may seek refuge from hunting in the newly expanded Park Unit and TNC lands where they might overconcentrate and impact unique vegetation communities. In these sites of refugia, or preferred loafing sites, elk and bison could accelerate a decline in woody riparian shrubs and trees. This decline may also be due to changes in hydrology, climatic, or dunal processes, but ungulate herbivory might exacerbate the effects of those processes.
\nTo address the questions and needs of local resource managers, a multi-agency research project was initiated in 2005 to study the ecology, forage relations, and habitat relations of elk and bison in the Great Sand Dunes–Sangre de Cristo–Baca complex of lands. Meetings and discussions of what this research should include were started in 2001 with representatives from NPS, USFWS, TNC, the Colorado Division of Wildlife (CDOW), and USDA-FS/BLM. The final study plan was successfully funded in 2004 with research scheduled to start in 2005. The research was designed to encompass three major study elements: (1) animal movements and population dynamics, (2) vegetation and nutrient effects from ungulate herbivory, and (3) development of ecological models, using empirical data collected from the first two components, that will include estimates of elk carrying capacity and management scenarios for resource managers.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20061267","usgsCitation":"Schoenecker, K.A., Lubow, B., Zeigenfuss, L., and Mao, J., 2006, 2005 annual progress report: Elk and bison grazing ecology in the Great Sand Dunes complex of lands: U.S. Geological Survey Open-File Report 2006-1267, viii, 45 p., https://doi.org/10.3133/ofr20061267.","productDescription":"viii, 45 p.","numberOfPages":"53","onlineOnly":"Y","additionalOnlineFiles":"N","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":190612,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20061267.PNG"},{"id":320220,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2006/1267/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Colorado","otherGeospatial":"Baca National Wildlife Refuge, Great Sand Dunes National Park and Preserve, San Luis Valley","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -105.86975097656249,\n 37.54893261064109\n ],\n [\n -105.86975097656249,\n 37.913867495923746\n ],\n [\n -105.49072265625,\n 37.913867495923746\n ],\n [\n -105.49072265625,\n 37.54893261064109\n ],\n [\n -105.86975097656249,\n 37.54893261064109\n ]\n ]\n ]\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd491fe4b0b290850eee8b","contributors":{"authors":[{"text":"Schoenecker, Kate A.","contributorId":64343,"corporation":false,"usgs":true,"family":"Schoenecker","given":"Kate","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":290017,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lubow, Bruce C.","contributorId":59520,"corporation":false,"usgs":true,"family":"Lubow","given":"Bruce C.","affiliations":[],"preferred":false,"id":290016,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zeigenfuss, Linda 0000-0002-6700-8563 linda_zeigenfuss@usgs.gov","orcid":"https://orcid.org/0000-0002-6700-8563","contributorId":2079,"corporation":false,"usgs":true,"family":"Zeigenfuss","given":"Linda","email":"linda_zeigenfuss@usgs.gov","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":290015,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Mao, Julie","contributorId":74460,"corporation":false,"usgs":true,"family":"Mao","given":"Julie","email":"","affiliations":[],"preferred":false,"id":290018,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":76896,"text":"sir20065065 - 2006 - Ecology of bonytail and razorback sucker and the role of off-channel habitats in their recovery","interactions":[],"lastModifiedDate":"2016-05-27T13:29:46","indexId":"sir20065065","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":334,"text":"Scientific Investigations Report","code":"SIR","onlineIssn":"2328-0328","printIssn":"2328-031X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2006-5065","title":"Ecology of bonytail and razorback sucker and the role of off-channel habitats in their recovery","docAbstract":"The bonytail and razorback sucker are two of four endangered mainstem fishes found in the Colorado River. Unlike the Colorado pikeminnow and humpback chub, wild populations of the bonytail and razorback sucker are either extirpated from the mainstem river or are nearly so. Agencies are aggressively stocking these fish and while repatriated fish spawn, their young are rapidly eaten by introduced predators. A decade of predator removal efforts has proved ineffective in restoring natural recruitment. Today, the presence of these species is totally dependent on stocking, suggesting both species are worse off today than when recovery efforts began nearly two decades ago.
\nIn contrast, both species readily produce young in ponds where nonnative predators are absent. Evidence shows they evolved with the ability to spawn in both flowing and standing water, which suggests isolated oxbow communities may have been an essential feature in their evolution and survival strategy.
\nSustainable populations during the past few decades have only occurred in isolated ponds devoid of predatory nonnative fish. Efforts to force recovery in the main channel river continue to fail due to the presence of nonnative predators that may be economically important recreational species. Off-channel sanctuaries provide research and management opportunities on a scale that are both biologically and economically realistic. Effective management of these species in small habitats appears to be the most logical approach to advance recovery in larger river reaches.
\nThis report presents new findings, updates existing information, and describes what may well represent the only practical approach to these species’ conservation and recovery. Chapter 1 provides an overview of the Colorado River system from its origin to the Gulf of California and includes a description of propagation and stocking programs which have not been described elsewhere. The report also updates what is known or suspected on the life history and ecology of these two endangered fishes. Chapter 2 describes the successful recruitment of both species at an oxbow pond on the Cibola National Wildlife Refuge in Arizona, discusses factors that contribute to completion of the life cycle of both fishes, and provides recommendations for future management of the impoundment. Chapter 3 provides historical evidence that oxbow habitats were formed historically in years of high runoff and the importance of these habitats for survival and evolution of native fishes. It also summarizes key features of habitats that can serve as sanctuaries that enhance early survival of the endangered fishes and allow the fish to complete their entire life cycles.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/sir20065065","usgsCitation":"Mueller, G.A., 2006, Ecology of bonytail and razorback sucker and the role of off-channel habitats in their recovery: U.S. Geological Survey Scientific Investigations Report 2006-5065, viii, 64 p., https://doi.org/10.3133/sir20065065.","productDescription":"viii, 64 p.","numberOfPages":"74","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":194605,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/sir20065065.PNG"},{"id":320226,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/sir/2006/5065/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a4ee4b07f02db627ab0","contributors":{"authors":[{"text":"Mueller, Gordon A.","contributorId":86420,"corporation":false,"usgs":true,"family":"Mueller","given":"Gordon","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":288111,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":79397,"text":"ofr20061314 - 2006 - Defining ecosystem flow requirements for the Bill Williams River, Arizona","interactions":[],"lastModifiedDate":"2016-04-25T14:25:53","indexId":"ofr20061314","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2006-1314","title":"Defining ecosystem flow requirements for the Bill Williams River, Arizona","docAbstract":"Alteration of natural river flows resulting from the construction and operation of dams can result in substantial changes to downstream aquatic and bottomland ecosystems and undermine the long-term health of native species and communities (for general review, cf. Ward and Stanford, 1995; Baron and others, 2002; Nilsson and Svedmark, 2002). Increasingly, land and water managers are seeking ways to manage reservoir releases to produce flow regimes that simultaneously meet human needs and maintain the health and sustainability of downstream biotaa.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20061314","usgsCitation":"2006, Defining ecosystem flow requirements for the Bill Williams River, Arizona: U.S. Geological Survey Open-File Report 2006-1314, ix, 135 p., https://doi.org/10.3133/ofr20061314.","productDescription":"ix, 135 p.","numberOfPages":"144","onlineOnly":"Y","additionalOnlineFiles":"N","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":190716,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20061314.PNG"},{"id":320227,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2006/1314/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Arizona","otherGeospatial":"Bill Williams River","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -113.9666748046875,\n 34.116352469972746\n ],\n [\n -113.9666748046875,\n 35.34425514918409\n ],\n [\n -112.65380859375,\n 35.34425514918409\n ],\n [\n -112.65380859375,\n 34.116352469972746\n ],\n [\n -113.9666748046875,\n 34.116352469972746\n ]\n ]\n ]\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4abbe4b07f02db67253b","contributors":{"editors":[{"text":"Shafroth, Patrick B. 0000-0002-6064-871X shafrothp@usgs.gov","orcid":"https://orcid.org/0000-0002-6064-871X","contributorId":2000,"corporation":false,"usgs":true,"family":"Shafroth","given":"Patrick","email":"shafrothp@usgs.gov","middleInitial":"B.","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":627610,"contributorType":{"id":2,"text":"Editors"},"rank":1},{"text":"Beauchamp, Vanessa B.","contributorId":39468,"corporation":false,"usgs":true,"family":"Beauchamp","given":"Vanessa","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":627611,"contributorType":{"id":2,"text":"Editors"},"rank":2}]}} ,{"id":77646,"text":"fs20063071 - 2006 - Tamarisk control, water salvage, and wildlife habitat restoration along rivers in the western United States","interactions":[],"lastModifiedDate":"2016-05-26T14:53:38","indexId":"fs20063071","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":313,"text":"Fact Sheet","code":"FS","onlineIssn":"2327-6932","printIssn":"2327-6916","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2006-3071","title":"Tamarisk control, water salvage, and wildlife habitat restoration along rivers in the western United States","docAbstract":"In the latter part of the 19th century, species of the nonnative shrub tamarisk (also called saltcedar; for example, Tamarix ramosissima, T. chinensis) were introduced to the United States for use as ornamental plants for erosion control. By 1877, some naturalized populations had become established, and by the 1960s, tamarisk was present along most rivers in the semi-arid and arid parts of the West and was quite abundant along downstream ranches of the major southwest rivers such as the Colorado, Rio Grande, Gila, and Pecos. The principal period of tamarisk invasion coincided with changing physical conditions along western rivers associated with the construction and operation of dams. In many cases, these altered physical conditions appear to have been more favorable for tamarisk than native riparian competitors like cottonwoods and willows (Populus and Salix; Glenn and Nagler, 2005).
\nThe great abundance of tamarisk along western rivers has led resource managers to seek to control it for various reasons, including a desire to (1) increase the flow of water in streams that might otherwise be lost to evapotranspiration (ET) (evapotranspiration is the combination of water lost as vapor from a soil or open water surface [evaporation] and water lost from the surface of the plant, usually from the stomata [transpiration]); (2) restore native riparian vegetation (here, “riparian” refers to the banks and flood plains of rivers, or shorelines of reservoirs or lakes); and (3) improve wildlife habitat.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/fs20063071","usgsCitation":"Shafroth, P.B., 2006, Tamarisk control, water salvage, and wildlife habitat restoration along rivers in the western United States: U.S. Geological Survey Fact Sheet 2006-3071, 2 p., https://doi.org/10.3133/fs20063071.","productDescription":"2 p.","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":122338,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/fs_2006_3071.jpg"},{"id":320234,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/fs/2006/3071/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4adde4b07f02db686d46","contributors":{"authors":[{"text":"Shafroth, Patrick B. 0000-0002-6064-871X shafrothp@usgs.gov","orcid":"https://orcid.org/0000-0002-6064-871X","contributorId":2000,"corporation":false,"usgs":true,"family":"Shafroth","given":"Patrick","email":"shafrothp@usgs.gov","middleInitial":"B.","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":288827,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":77648,"text":"fs20063088 - 2006 - \"HIP\" new software: The Hydroecological Integrity Assessment Process","interactions":[],"lastModifiedDate":"2018-01-01T16:52:26","indexId":"fs20063088","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":313,"text":"Fact Sheet","code":"FS","onlineIssn":"2327-6932","printIssn":"2327-6916","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2006-3088","title":"\"HIP\" new software: The Hydroecological Integrity Assessment Process","docAbstract":"Managing rivers and streams to maintain healthy aquatic ecosystems is a challenge for resource managers across the country. Demand for competing uses of water resources grows with escalating development, increasing recreational use, and the vagaries of climate and weather. For many species of concern, instream flow and associated water quality are critical for survival. Balancing ecosystem needs with proposed changes in flow regimes requires a process managers can use to determine the ecological and hydrological effects of changes in streamflow.
\nCenter (FORT) have developed the Hydroecological Integrity Assessment Process (HIP) and a suite of software tools for conducting a hydrologic classification of streams, addressing instream flow needs, and assessing past and proposed hydrologic alterations on streamflow and other ecosystem components. The HIP recognizes that streamflow is strongly related to many critical physiochemical components of rivers, such as dissolved oxygen, channel geomorphology, and habitats. Streamflow is considered a “master variable” that limits the distribution, abundance, and diversity of many aquatic plant and animal species.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/fs20063088","usgsCitation":"Henriksen, J., and Wilson, J.T., 2006, \"HIP\" new software: The Hydroecological Integrity Assessment Process: U.S. Geological Survey Fact Sheet 2006-3088, 2 p., https://doi.org/10.3133/fs20063088.","productDescription":"2 p.","onlineOnly":"Y","additionalOnlineFiles":"N","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":121012,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/fs_2006_3088.jpg"},{"id":320221,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/fs/2006/3088/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd4900e4b0b290850eecc0","contributors":{"authors":[{"text":"Henriksen, Jim","contributorId":23638,"corporation":false,"usgs":true,"family":"Henriksen","given":"Jim","affiliations":[],"preferred":false,"id":288829,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wilson, Juliette T.","contributorId":86439,"corporation":false,"usgs":true,"family":"Wilson","given":"Juliette","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":288830,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":79396,"text":"ofr20061249 - 2006 - Assessment of factors limiting Klamath River fall Chinook salmon production potential using historical flows and temperatures","interactions":[],"lastModifiedDate":"2016-04-25T14:43:11","indexId":"ofr20061249","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2006-1249","title":"Assessment of factors limiting Klamath River fall Chinook salmon production potential using historical flows and temperatures","docAbstract":"We parameterized and applied a deterministic salmon production model to infer the degree to which river flows and temperatures may limit freshwater production potential of the Klamath River in California. Specific parameter requirements, data sources, and significant assumptions are discussed in detail. Model simulations covered a wide variety of historical hydrologic and meteorologic conditions for 40+ years of environmental data.
\nThe model was calibrated only qualitatively, appearing to perform well in predicted outmigrant timing, but overestimating growth. Egg-to-outmigrant survival was near that reported for other rivers north of the Klamath River.
\nPredicted production potential appeared to be determined by multiple causes involving both regularly occurring habitat-related constraints and irregularly occurring exposure to high water temperatures. Simulated production was greatest in years of intermediate water availability and was constrained in both dry and wet years, but for different reasons. Reducing mortality associated with limitations to juvenile habitat, if possible, would be expected to have the highest payoff in increasing production. Water temperature was important in determining predicted production in some years but overall was not predicted to be as important as physical microhabitat. No single mortality cause acted as a true “bottleneck” on production.
\nModel uncertainty is addressed through a sensitivity analysis. Predicted habitat area may be a large source of model uncertainty and sensitivity, but collectively, model parameters associated with timing of events (for example spawning, fry emergence, and emigration) or related triggers control much of the model sensitivity.
\n\n
Though model uncertainty remains, one can begin to explore potential alternatives to reduce production limitations. Specific recommendations are made regarding future study and reducing uncertainty.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20061249","usgsCitation":"Bartholow, J.M., and Henriksen, J.A., 2006, Assessment of factors limiting Klamath River fall Chinook salmon production potential using historical flows and temperatures: U.S. Geological Survey Open-File Report 2006-1249, viii, 111 p., https://doi.org/10.3133/ofr20061249.","productDescription":"viii, 111 p.","numberOfPages":"119","onlineOnly":"Y","additionalOnlineFiles":"N","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":192187,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20061249.PNG"},{"id":320228,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2006/1249/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"California, Oregon","otherGeospatial":"Klamath River","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -124.03015136718749,\n 41.253032440653186\n ],\n [\n -123.255615234375,\n 40.371658891506094\n ],\n [\n -122.9644775390625,\n 40.3130432088809\n ],\n [\n -122.728271484375,\n 40.772221877329024\n ],\n [\n -122.3822021484375,\n 41.27367811566259\n ],\n [\n -120.75622558593749,\n 41.85728792769137\n ],\n [\n -121.1572265625,\n 43.40504748787035\n ],\n [\n -121.728515625,\n 43.41701888881103\n ],\n [\n -122.18994140624999,\n 42.91620643817353\n ],\n [\n -124.068603515625,\n 41.541477666790286\n ],\n [\n -124.03015136718749,\n 41.253032440653186\n ]\n ]\n ]\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4abae4b07f02db67201a","contributors":{"authors":[{"text":"Bartholow, John M.","contributorId":77598,"corporation":false,"usgs":true,"family":"Bartholow","given":"John","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":289779,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Henriksen, James A.","contributorId":89985,"corporation":false,"usgs":true,"family":"Henriksen","given":"James","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":289780,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":79555,"text":"sir20065224 - 2006 - The Amphibian Research and Monitoring Initiative (ARMI): 5-year report","interactions":[],"lastModifiedDate":"2020-01-26T11:39:48","indexId":"sir20065224","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":334,"text":"Scientific Investigations Report","code":"SIR","onlineIssn":"2328-0328","printIssn":"2328-031X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2006-5224","title":"The Amphibian Research and Monitoring Initiative (ARMI): 5-year report","docAbstract":"The Amphibian Research and Monitoring Initiative (ARMI) is an innovative, multidisciplinary program that began in 2000 in response to a congressional directive for the Department of the Interior to address the issue of amphibian declines in the United States. ARMI’s formulation was cross-disciplinary, integrating U.S. Geological Survey scientists from Biology, Water, and Geography to develop a course of action (Corn and others, 2005a). The result has been an effective program with diverse, yet complementary, expertise.
\nARMI’s approach to research and monitoring is multiscale. Detailed investigations focus on a few species at selected local sites throughout the country; monitoring addresses a larger number of species over broader areas (typically, National Parks and National Wildlife Refuges); and inventories to document species occurrence are conducted more extensively across the landscape. Where monitoring is conducted, the emphasis is on an ability to draw statistically defensible conclusions about the status of amphibians. To achieve this objective, ARMI has instituted a monitoring response variable that has nationwide applicability. At research sites, ARMI focuses on studying species/environment interactions, determining causes of observed declines, and developing new techniques to sample populations and analyze data. Results from activities at all scales are provided to scientists, land managers, and policymakers, as appropriate.
\nThe ARMI program and the scientists involved contribute significantly to understanding amphibian declines at local, regional, national, and international levels. Within National Parks and National Wildlife Refuges, findings help land managers make decisions applicable to amphibian conservation. For example, the National Park Service (NPS) selected amphibians as a vital sign for several of their monitoring networks, and ARMI scientists provide information and assistance in developing monitoring methods for this NPS effort. At the national level, ARMI has had major exposure at a variety of meetings, including a dedicated symposium at the 2004 joint meetings of the Herpetologists’ League, the American Society of Ichthyologists and Herpetologists, and the Society for the Study of Amphibians and Reptiles. Several principal investigators have brought international exposure to ARMI through venues such as the World Congress of Herpetology in South Africa in 2005 (invited presentation by Dr. Gary Fellers), the Global Amphibian Summit, sponsored by the International Union for Conservation of Nature (IUCN) and Wildlife Conservation International, in Washington, D.C., 2005 (invited participation by Dr. P.S. Corn), and a special issue of the international herpetological journal Alytes focused on ARMI in 2004 (edited by Dr. C.K. Dodd, Jr.).
\nARMI research and monitoring efforts have addressed at least 7 of the 21 Threatened and Endangered Species listed by the U.S. Fish and Wildlife Service (California red-legged frog [Rana draytonii], Chiricahua leopard frog [R. chiricahuensis], arroyo toad [Bufo californicus], dusky gopher frog [Rana sevosa], mountain yellow-legged frog [R. muscosa], flatwoods salamander [Ambystoma cingulatum], and the golden coqui [Eleutherodactylus jasperi]), and 9 additional species of concern recognized by the IUCN. ARMI investigations have addressed time-sensitive research, such as emerging infectious diseases and effects on amphibians related to natural disasters like wildfire, hurricanes, and debris flows, and the effects of more constant, environmental change, like urban expansion, road development, and the use of pesticides.
\nOver the last 5 years, ARMI has partnered with an extensive list of government, academic, and private entities. These partnerships have been fruitful and have assisted ARMI in developing new field protocols and analytic tools, in using and refining emerging technologies to improve accuracy and efficiency of data handling, in conducting amphibian disease, malformation, and environmental effects research, and in implementing a network of monitoring and research sites. Accomplishments from these endeavors include more than 40 publications on amphibian status and trends, nearly 100 publications on amphibian ecology and causes of declines, and over 30 methodological publications. Several databases have emerged as a result of ARMI and its partnerships; one, a digital atlas of ranges for all U.S. amphibian species, was used by the IUCN to display amphibian distribution maps in the Global Amphibian Assessment Project.
\nGiven the scope of ARMI and the panoply of projects, findings have had implications for policy. Investigations that demonstrate amphibian declines or illuminate causes of declines provide valuable information about habitat management, environmental effects, mechanisms for the spread of disease, and human/amphibian interfaces. This information has been made available to land managers, scientists, educators, Congress and other policymakers, and the public. The support afforded ARMI by Congress has been influential in the program’s development and success. The value of ARMI’s efforts will continue to increase as we are able to extend our studies spatially and temporally to answer critical questions with more confidence. We are using ARMI’s resources efficiently and continuing to develop innovative mechanisms for leveraging resources for maximum effectiveness during challenging financial times.
\nThis report is a 5-year retrospective of the structure, methodology, progress, and contributions to the broader scientific community that have resulted from this national USGS program. We evaluate ARMI’s success to date, with regard to the challenges faced by the program and the strengths that have emerged. We chart objectives for the next 5 years that build on current accomplishments, highlight areas meriting further research, and direct efforts to overcome existing weaknesses.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/sir20065224","usgsCitation":"Muths, E., Gallant, A.L., Campbell Grant, E., Battaglin, W.A., Green, D.E., Staiger, J.S., Walls, S., Gunzburger, M.S., and Kearney, R.F., 2006, The Amphibian Research and Monitoring Initiative (ARMI): 5-year report: U.S. Geological Survey Scientific Investigations Report 2006-5224, viii, 77 p., https://doi.org/10.3133/sir20065224.","productDescription":"viii, 77 p.","numberOfPages":"87","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true},{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":191954,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/sir20065224.PNG"},{"id":320233,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/sir/2006/5224/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ad5e4b07f02db68344c","contributors":{"authors":[{"text":"Muths, Erin 0000-0002-5498-3132","orcid":"https://orcid.org/0000-0002-5498-3132","contributorId":14012,"corporation":false,"usgs":true,"family":"Muths","given":"Erin","affiliations":[],"preferred":false,"id":290215,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gallant, Alisa L. 0000-0002-3029-6637 gallant@usgs.gov","orcid":"https://orcid.org/0000-0002-3029-6637","contributorId":2940,"corporation":false,"usgs":true,"family":"Gallant","given":"Alisa","email":"gallant@usgs.gov","middleInitial":"L.","affiliations":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true},{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true}],"preferred":true,"id":290212,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Campbell Grant, Evan H. 0000-0003-4401-6496","orcid":"https://orcid.org/0000-0003-4401-6496","contributorId":23233,"corporation":false,"usgs":true,"family":"Campbell Grant","given":"Evan H.","affiliations":[],"preferred":false,"id":290216,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Battaglin, William A. 0000-0001-7287-7096 wbattagl@usgs.gov","orcid":"https://orcid.org/0000-0001-7287-7096","contributorId":1527,"corporation":false,"usgs":true,"family":"Battaglin","given":"William","email":"wbattagl@usgs.gov","middleInitial":"A.","affiliations":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true}],"preferred":true,"id":290211,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Green, David E. 0000-0002-7663-1832 degreen@usgs.gov","orcid":"https://orcid.org/0000-0002-7663-1832","contributorId":3715,"corporation":false,"usgs":true,"family":"Green","given":"David","email":"degreen@usgs.gov","middleInitial":"E.","affiliations":[{"id":456,"text":"National Wildlife Health Center","active":true,"usgs":true}],"preferred":true,"id":290213,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Staiger, Jennifer S. jstaiger@usgs.gov","contributorId":5915,"corporation":false,"usgs":true,"family":"Staiger","given":"Jennifer","email":"jstaiger@usgs.gov","middleInitial":"S.","affiliations":[],"preferred":true,"id":290214,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Walls, Susan C. 0000-0001-7391-9155","orcid":"https://orcid.org/0000-0001-7391-9155","contributorId":52284,"corporation":false,"usgs":true,"family":"Walls","given":"Susan C.","affiliations":[],"preferred":false,"id":290218,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Gunzburger, Margaret S.","contributorId":43449,"corporation":false,"usgs":true,"family":"Gunzburger","given":"Margaret","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":290217,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Kearney, Rick F.","contributorId":72472,"corporation":false,"usgs":true,"family":"Kearney","given":"Rick","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":290219,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}} ,{"id":79589,"text":"ofr20061318 - 2006 - Deschutes Estuary feasibility study: Hydrodynamics and sediment transport modeling","interactions":[],"lastModifiedDate":"2023-09-01T21:35:25.751519","indexId":"ofr20061318","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2006-1318","title":"Deschutes Estuary feasibility study: Hydrodynamics and sediment transport modeling","docAbstract":"Continual sediment accumulation in Capitol Lake since the damming of the Deschutes River in 1951 has altered the initial morphology of the basin. As part of the Deschutes River Estuary Feasibility Study (DEFS), the United States Geological Survey (USGS) was tasked to model how tidal and storm processes will influence the river, lake and lower Budd Inlet should estuary restoration occur. Understanding these mechanisms will assist in developing a scientifically sound assessment on the feasibility of restoring the estuary.
\nThe goals of the DEFS are as follows.
\n- Increase understanding of the estuary alternative to the same level as managing the lake environment.
\n- Determine the potential to create a viable, self sustaining estuary at Capitol Lake, given all the existing physical constraints and the urban setting.
\n- Create a net-benefit matrix which will allow a fair evaluation of overall benefits and costs of various alternative scenarios.
\n- Provide the completed study to the CLAMP Steering Committee so that a recommendation about a long-term aquatic environment of the basin can be made.
\nThe hydrodynamic and sediment transport modeling task developed a number of different model simulations using a process-based morphological model, Delft3D, to help address these goals. Modeling results provide a qualitative assessment of estuarine behavior both prior to dam construction and after various post-dam removal scenarios. Quantitative data from the model is used in the companion biological assessment and engineering design components of the overall study.
\nOverall, the modeling study found that after dam removal, tidal and estuarine processes are immediately restored, with marine water from Budd Inlet carried into North and Middle Basin on each rising tide and mud flats being exposed with each falling tide. Within the first year after dam removal, tidal processes, along with the occasional river floods, act to modify the estuary bed by redistributing sediment through erosion and deposition. The morphological response of the bed is rapid during the first couple of years, then slows as a dynamic equilibrium is reached within three to five years. By ten years after dam removal, the overall hydrodynamic and morphologic behavior of the estuary is similar to the pre-dam estuary, with the exception of South Basin, which has been permanently modified by human activities.
\nIn addition to a qualitative assessment of estuarine behavior, process-based modeling provides the ability address specific questions to help to inform decision-making. Considering that predicting future conditions of a complex estuarine environment is wrought with uncertainties, quantitative results in this report are often expressed in terms of ranges of possible outcomes.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20061318","usgsCitation":"George, D.A., Gelfenbaum, G., Lesser, G., and Stevens, A., 2006, Deschutes Estuary feasibility study: Hydrodynamics and sediment transport modeling (Version 1.0): U.S. Geological Survey Open-File Report 2006-1318, Report: 222 p.; 2 Appendixes: 177 p.; Metadata, https://doi.org/10.3133/ofr20061318.","productDescription":"Report: 222 p.; 2 Appendixes: 177 p.; Metadata","temporalStart":"2005-02-16","temporalEnd":"2005-02-17","costCenters":[{"id":645,"text":"Western Coastal and Marine Geology","active":false,"usgs":true}],"links":[{"id":420428,"rank":6,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_80585.htm","linkFileType":{"id":5,"text":"html"}},{"id":9208,"rank":5,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2006/1318/","linkFileType":{"id":5,"text":"html"}},{"id":192369,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":295746,"rank":4,"type":{"id":16,"text":"Metadata"},"url":"https://pubs.usgs.gov/of/2006/1318/CapitolLakeSeds.html","linkFileType":{"id":5,"text":"html"}},{"id":295744,"rank":3,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2006/1318/of2006-1318.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":295745,"rank":2,"type":{"id":3,"text":"Appendix"},"url":"https://pubs.usgs.gov/of/2006/1318/of2006-1318_appendixes.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Washington","otherGeospatial":"Deschutes Estuary","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -122.9133,\n 47.0619\n ],\n [\n -122.9133,\n 47.0183\n ],\n [\n -122.8914,\n 47.0183\n ],\n [\n -122.8914,\n 47.0619\n ],\n [\n -122.9133,\n 47.0619\n ]\n ]\n ]\n }\n }\n ]\n}","edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ab0e4b07f02db66dd64","contributors":{"authors":[{"text":"George, Douglas A.","contributorId":60328,"corporation":false,"usgs":true,"family":"George","given":"Douglas","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":290306,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gelfenbaum, Guy","contributorId":79844,"corporation":false,"usgs":true,"family":"Gelfenbaum","given":"Guy","affiliations":[],"preferred":false,"id":290307,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lesser, Giles","contributorId":88216,"corporation":false,"usgs":true,"family":"Lesser","given":"Giles","email":"","affiliations":[],"preferred":false,"id":290308,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Stevens, Andrew W.","contributorId":89093,"corporation":false,"usgs":true,"family":"Stevens","given":"Andrew W.","affiliations":[],"preferred":false,"id":290309,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":79778,"text":"tm10C4 - 2006 - Determination of the δ34S of Total Sulfur in Solids: RSIL Lab Code 1800","interactions":[],"lastModifiedDate":"2013-02-11T10:47:35","indexId":"tm10C4","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":335,"text":"Techniques and Methods","code":"TM","onlineIssn":"2328-7055","printIssn":"2328-7047","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"10-C4","title":"Determination of the δ34S of Total Sulfur in Solids: RSIL Lab Code 1800","docAbstract":"The purpose of Reston Stable Isotope Laboratory Lab (RSIL) Code 1800 is to determine the δ(34S/32S), abbreviated as δ34S, of total sulfur in a solid sample. A Carlo Erba NC 2500 elemental analyzer (EA) is used to convert total sulfur in a solid sample into SO2 gas. The EA is connected to a continuous flow isotope-ratio mass spectrometer (CF-IRMS), which determines the relative difference in stable sulfur isotope-amount ratio (34S/32S) of the product SO2 gas. The combustion is quantitative; no isotopic fractionation is involved. Samples are placed in tin capsules and loaded into a Costech Zero-Blank Autosampler on the EA. Under computer control, samples are dropped into a heated tube reaction tube that combines both the oxidation and the reduction reactions. The combustion takes place in a He atmosphere that contains an excess of oxygen gas at the oxidation zone at the top of the reaction tube. Combustion products are transported by a He carrier through the reduction zone at the bottom of the reaction tube to remove excess oxygen and through a separate drying tube to remove any water. The gas-phase products, mainly CO2, N2, and SO2, are separated by a gas chromatograph (GC). The gas is then introduced into the isotope-ratio mass spectrometer (IRMS) through a Thermo-Finnigan ConFlo II interface, which also is used to inject SO2 reference gas and He for sample dilution. The IRMS is a Thermo-Finnigan DeltaPlus CF-IRMS. It has a universal triple collector with two wide cups and a narrow cup in the middle. It is capable of measuring mass/charge (m/z) 64 and 66 simultaneously. The ion beams from SO2 are as follows: m/z 64 = SO2 = 32S16O16O; and m/z 66 = SO2 = 34S16O16O primarily.","language":"ENGLISH","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/tm10C4","usgsCitation":"Revesz, K., and Coplen, T.B., 2006, Determination of the δ34S of Total Sulfur in Solids: RSIL Lab Code 1800 (Version 1.2, August 2012 (Version 1.1 2007)): U.S. Geological Survey Techniques and Methods 10-C4, viii, 31 p.; ill.; Appendices, https://doi.org/10.3133/tm10C4.","productDescription":"viii, 31 p.; ill.; Appendices","costCenters":[{"id":543,"text":"Reston Stable Isotope Laboratory","active":false,"usgs":true}],"links":[{"id":190777,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/tm_10_C4.gif"},{"id":9466,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/tm/10c4/","linkFileType":{"id":5,"text":"html"}}],"edition":"Version 1.2, August 2012 (Version 1.1 2007)","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4aa8e4b07f02db66759b","contributors":{"authors":[{"text":"Revesz, Kinga","contributorId":64285,"corporation":false,"usgs":true,"family":"Revesz","given":"Kinga","affiliations":[],"preferred":false,"id":290815,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Coplen, Tyler B. 0000-0003-4884-6008 tbcoplen@usgs.gov","orcid":"https://orcid.org/0000-0003-4884-6008","contributorId":508,"corporation":false,"usgs":true,"family":"Coplen","given":"Tyler","email":"tbcoplen@usgs.gov","middleInitial":"B.","affiliations":[{"id":37464,"text":"WMA - Laboratory & Analytical Services Division","active":true,"usgs":true},{"id":27111,"text":"National Water Quality Program","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":290814,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":79168,"text":"sir20065151 - 2006 - Water quality of the Crescent River basin, Lake Clark National Park and Preserve, Alaska, 2003-2004","interactions":[],"lastModifiedDate":"2018-07-07T18:17:03","indexId":"sir20065151","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":334,"text":"Scientific Investigations Report","code":"SIR","onlineIssn":"2328-0328","printIssn":"2328-031X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2006-5151","title":"Water quality of the Crescent River basin, Lake Clark National Park and Preserve, Alaska, 2003-2004","docAbstract":"The U.S. Geological Survey and the National Park Service conducted a water-quality investigation of the Crescent River Basin in Lake Clark National Park and Preserve from May 2003 through September 2004. The Crescent River Basin was studied because it has a productive sockeye salmon run that is important to the Cook Inlet commercial fishing industry. Water-quality, biology, and limnology characteristics were assessed. Glacier-fed streams that flow into Crescent Lake transport suspended sediment that is trapped by the lake. Suspended sediment concentrations from the Lake Fork Crescent River (the outlet stream of Crescent Lake) were less than 10 milligrams per liter, indicating a high trapping efficiency of Crescent Lake. The North Fork Crescent River transports suspended sediment throughout its course and provides most of the suspended sediment to the main stem of the Crescent River downstream from the confluence of the Lake Fork Crescent River. Three locations on Crescent Lake were profiled during the summer of 2004. Turbidity profiles indicate sediment plumes within the water column at various times during the summer. Turbidity values are higher in June, reflecting the glacier-fed runoff into the lake. Lower values of turbidity in August and September indicate a decrease of suspended sediment entering Crescent Lake. The water type throughout the Crescent River Basin is calcium bicarbonate. Concentrations of nutrients, major ions, and dissolved organic carbon are low. Alkalinity concentrations are generally less than 20 milligrams per liter, indicating a low buffering capacity of these waters. Streambed sediments collected from three surface sites analyzed for trace elements indicated that copper concentrations at all sites were above proposed guidelines. However, copper concentrations are due to the local geology, not anthropogenic factors. Zooplankton samples from Crescent Lake indicated the main taxa are Cyclops sp., a Copepod, and within that taxa were a relatively small number of ovigerous (egg-bearing) individuals. Cyclops sp. are one of the primary food sources for rearing sockeye salmon juveniles and were most prevalent in the July sampling. Qualitative-Multi-Habitat algae samples were collected from two surface-water sites. A total of 59 taxa were found and were comprised of 4 phyla: Rhodophyta (red algae), Cyanophyta (blue-green algae), Chlorophyta (green algae), and Chrysophyta (diatoms). Twenty-two algal taxa were collected from the upper site, North Fork Crescent River, whereas twice as many taxa were collected from the downstream site, Crescent River near the mouth.
","language":"English","doi":"10.3133/sir20065151","usgsCitation":"Brabets, T.P., and Ourso, R.T., 2006, Water quality of the Crescent River basin, Lake Clark National Park and Preserve, Alaska, 2003-2004: U.S. Geological Survey Scientific Investigations Report 2006-5151, v, 40 p., https://doi.org/10.3133/sir20065151.","productDescription":"v, 40 p.","startPage":"0","endPage":"0","numberOfPages":"45","onlineOnly":"N","additionalOnlineFiles":"N","temporalStart":"2003-01-01","temporalEnd":"2004-12-31","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":195538,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":8623,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/sir/2006/5151/","linkFileType":{"id":5,"text":"html"}}],"geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -155.15167236328125,\n 59.80616004020659\n ],\n [\n -155.15167236328125,\n 60.50187784207829\n ],\n [\n -153.402099609375,\n 60.50187784207829\n ],\n [\n -153.402099609375,\n 59.80616004020659\n ],\n [\n -155.15167236328125,\n 59.80616004020659\n ]\n ]\n ]\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a1ae4b07f02db606486","contributors":{"authors":[{"text":"Brabets, Timothy P. tbrabets@usgs.gov","contributorId":2087,"corporation":false,"usgs":true,"family":"Brabets","given":"Timothy","email":"tbrabets@usgs.gov","middleInitial":"P.","affiliations":[],"preferred":true,"id":289278,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ourso, Robert T. 0000-0002-5952-8681 rtourso@usgs.gov","orcid":"https://orcid.org/0000-0002-5952-8681","contributorId":203207,"corporation":false,"usgs":true,"family":"Ourso","given":"Robert","email":"rtourso@usgs.gov","middleInitial":"T.","affiliations":[{"id":120,"text":"Alaska Science Center Water","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":289279,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031000,"text":"70031000 - 2006 - Determination of uranyl incorporation into biogenic manganese oxides using X-ray absorption spectroscopy and scattering","interactions":[],"lastModifiedDate":"2018-10-29T09:58:58","indexId":"70031000","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Determination of uranyl incorporation into biogenic manganese oxides using X-ray absorption spectroscopy and scattering","docAbstract":"Βiogenic manganese oxides are common and an important source of reactive mineral surfaces in the environment that may be potentially enhanced in bioremediation cases to improve natural attenuation. Experiments were performed in which the uranyl ion, UO22+ (U(VI)), at various concentrations was present during manganese oxide biogenesis. At all concentrations, there was strong uptake of U onto the oxides. Synchrotron-based extended X-ray absorption fine structure (EXAFS) spectroscopy and X-ray diffraction (XRD) studies were carried out to determine the molecular-scale mechanism by which uranyl is incorporated into the oxide and how this incorporation affects the resulting manganese oxide structure and mineralogy. The EXAFS experiments show that at low concentrations (<0.3 mol % U, <1 μM U(VI) in solution), U(VI) is present as a strong bidentate surface complex. At high concentrations (>2 mol % U, >4 μM U(VI) in solution), the presence of U(VI) affects the stability and structure of the Mn oxide to form poorly ordered Mn oxide tunnel structures, similar to todorokite. EXAFS modeling shows that uranyl is present in these oxides predominantly in the tunnels of the Mn oxide structure in a tridentate complex. Observations by XRD corroborate these results. Structural incorporation may lead to more stable U(VI) sequestration that may be suitable for remediation uses. These observations, combined with the very high uptake capacity of the Mn oxides, imply that Mn-oxidizing bacteria may significantly influence dissolved U(VI) concentrations in impacted waters via sorption and incorporation into Mn oxide biominerals.
Excavating into the shallow Martian subsurface has the potential to expose stratigraphic layers and mature regolith, which may hold a record of more ancient aqueous interactions than those expected under current Martian surface conditions. During the Spirit rover's exploration of Gusev crater, rover wheels were used to dig three trenches into the subsurface regolith down to 6-11 cm depth: Road Cut, the Big Hole, and The Boroughs. A high oxidation state of Fe and high concentrations of Mg, S, Cl, and Br were found in the subsurface regolith within the two trenches on the plains, between the Bonneville crater and the foot of Columbia Hills. Data analyses on the basis of geochemistry and mineralogy observations suggest the deposition of sulfate minerals within the subsurface regolith, mainly Mg-sulfates accompanied by minor Ca-sulfates and perhaps Fe-sulfates. An increase of Fe2O3, an excess of SiO2, and a minor decrease in the olivine proportion relative to surface materials are also inferred. Three hypotheses are proposed to explain the geochemical trends observed in trenches: (1) multiple episodes of acidic fluid infiltration, accompanied by in situ interaction with igneous minerals and salt deposition; (2) an open hydrologic system characterized by ion transportation in the fluid, subsequent evaporation of the fluid, and salt deposition; and (3) emplacement and mixing of impact ejecta of variable composition. While all three may have plausibly contributed to the current state of the subsurface regolith, the geochemical data are most consistent with ion transportation by fluids and salt deposition as a result of open-system hydrologic behavior. Although sulfates make up >20 wt.% of the regolith in the wall of The Boroughs trench, a higher hydrated sulfate than kieserite within The Boroughs or a greater abundance of sulfates elsewhere than is seen in The Boroughs wall regolith would be needed to hold the structural water indicated by the water-equivalent hydrogen concentration observed by the Gamma-Ray Spectrometer on Odyssey in the Gusev region.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research E: Planets","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"American Geophysical Union","publisherLocation":"Washington, D.C.","doi":"10.1029/2005JE002513","issn":"01480227","usgsCitation":"Wang, A., Haskin, L., Squyres, S.W., Jolliff, B., Crumpler, L., Gellert, R., Schroder, C., Herkenhoff, K.E., Hurowitz, J., Tosca, N., Farrand, W.H., Anderson, R., and Knudson, A., 2006, Sulfate deposition in subsurface regolith in Gusev crater, Mars: Journal of Geophysical Research E: Planets, v. 111, no. E2, 19 p., https://doi.org/10.1029/2005JE002513.","productDescription":"19 p.","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":477418,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2005je002513","text":"Publisher Index Page"},{"id":238641,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"Gusev crater; Mars","volume":"111","issue":"E2","noUsgsAuthors":false,"publicationDate":"2006-02-21","publicationStatus":"PW","scienceBaseUri":"505b9dc0e4b08c986b31da54","contributors":{"authors":[{"text":"Wang, A.","contributorId":46735,"corporation":false,"usgs":true,"family":"Wang","given":"A.","email":"","affiliations":[],"preferred":false,"id":429578,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Haskin, L.A.","contributorId":74926,"corporation":false,"usgs":true,"family":"Haskin","given":"L.A.","email":"","affiliations":[],"preferred":false,"id":429582,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Squyres, S. W.","contributorId":31836,"corporation":false,"usgs":true,"family":"Squyres","given":"S.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":429576,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jolliff, B.L.","contributorId":21268,"corporation":false,"usgs":true,"family":"Jolliff","given":"B.L.","email":"","affiliations":[],"preferred":false,"id":429575,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Crumpler, L.","contributorId":59545,"corporation":false,"usgs":true,"family":"Crumpler","given":"L.","email":"","affiliations":[],"preferred":false,"id":429579,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Gellert, Ralf","contributorId":35049,"corporation":false,"usgs":false,"family":"Gellert","given":"Ralf","email":"","affiliations":[{"id":12660,"text":"University of Guelph","active":true,"usgs":false}],"preferred":false,"id":429577,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Schroder, C.","contributorId":67201,"corporation":false,"usgs":true,"family":"Schroder","given":"C.","affiliations":[],"preferred":false,"id":429581,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Herkenhoff, Kenneth E. 0000-0002-3153-6663 kherkenhoff@usgs.gov","orcid":"https://orcid.org/0000-0002-3153-6663","contributorId":2275,"corporation":false,"usgs":true,"family":"Herkenhoff","given":"Kenneth","email":"kherkenhoff@usgs.gov","middleInitial":"E.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":429572,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Hurowitz, J.","contributorId":17742,"corporation":false,"usgs":true,"family":"Hurowitz","given":"J.","email":"","affiliations":[],"preferred":false,"id":429574,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Tosca, N.J.","contributorId":17354,"corporation":false,"usgs":true,"family":"Tosca","given":"N.J.","email":"","affiliations":[],"preferred":false,"id":429573,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Farrand, W. H.","contributorId":64372,"corporation":false,"usgs":true,"family":"Farrand","given":"W.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":429580,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Anderson, R.","contributorId":104191,"corporation":false,"usgs":false,"family":"Anderson","given":"R.","affiliations":[],"preferred":false,"id":429583,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Knudson, A.T.","contributorId":15746,"corporation":false,"usgs":true,"family":"Knudson","given":"A.T.","email":"","affiliations":[],"preferred":false,"id":429571,"contributorType":{"id":1,"text":"Authors"},"rank":13}]}} ,{"id":70031167,"text":"70031167 - 2006 - An improved model for the calculation of CO2 solubility in aqueous solutions containing Na+, K+, Ca2+, Mg2+, Cl-, and SO42-","interactions":[],"lastModifiedDate":"2012-03-12T17:21:18","indexId":"70031167","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2662,"text":"Marine Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"An improved model for the calculation of CO2 solubility in aqueous solutions containing Na+, K+, Ca2+, Mg2+, Cl-, and SO42-","docAbstract":"An improved model is presented for the calculation of the solubility of carbon dioxide in aqueous solutions containing Na+, K+, Ca2+, Mg2+, Cl-, and SO42- in a wide temperature-pressure-ionic strength range (from 273 to 533 K, from 0 to 2000 bar, and from 0 to 4.5 molality of salts) with experimental accuracy. The improvements over the previous model [Duan, Z. and Sun, R., 2003. An improved model calculating CO2 solubility in pure water and aqueous NaCl solutions from 273 to 533K and from 0 to 2000 bar. Chemical Geology, 193: 257-271] include: (1) By developing a non-iterative equation to replace the original equation of state in the calculation of CO 2 fugacity coefficients, the new model is at least twenty times computationally faster and can be easily adapted to numerical reaction-flow simulator for such applications as CO2 sequestration and (2) By fitting to the new solubility data, the new model improved the accuracy below 288 K from 6% to about 3% of uncertainty but still retains the high accuracy of the original model above 288 K. We comprehensively evaluate all experimental CO2 solubility data. Compared with these data, this model not only reproduces all the reliable data used for the parameterization but also predicts the data that were not used in the parameterization. In order to facilitate the application to CO2 sequestration, we also predicted CO2 solubility in seawater at two-phase coexistence (vapor-liquid or liquid-liquid) and at three-phase coexistence (CO2 hydrate-liquid water-vapor CO2 [or liquid CO2]). The improved model is programmed and can be downloaded from the website http://www.geochem-model.org/programs.htm. ?? 2005 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Marine Chemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.marchem.2005.09.001","issn":"03044203","usgsCitation":"Duan, Z., Sun, R., Zhu, C., and Chou, I., 2006, An improved model for the calculation of CO2 solubility in aqueous solutions containing Na+, K+, Ca2+, Mg2+, Cl-, and SO42-: Marine Chemistry, v. 98, no. 2-4, p. 131-139, https://doi.org/10.1016/j.marchem.2005.09.001.","startPage":"131","endPage":"139","numberOfPages":"9","costCenters":[],"links":[{"id":211407,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.marchem.2005.09.001"},{"id":238690,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"98","issue":"2-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ea72e4b0c8380cd4887b","contributors":{"authors":[{"text":"Duan, Zhenhao","contributorId":71302,"corporation":false,"usgs":true,"family":"Duan","given":"Zhenhao","email":"","affiliations":[],"preferred":false,"id":430339,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sun, R.","contributorId":10137,"corporation":false,"usgs":true,"family":"Sun","given":"R.","affiliations":[],"preferred":false,"id":430337,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zhu, Chen","contributorId":6244,"corporation":false,"usgs":true,"family":"Zhu","given":"Chen","email":"","affiliations":[],"preferred":false,"id":430336,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Chou, I.-M. 0000-0001-5233-6479","orcid":"https://orcid.org/0000-0001-5233-6479","contributorId":44283,"corporation":false,"usgs":true,"family":"Chou","given":"I.-M.","affiliations":[{"id":245,"text":"Eastern Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":false,"id":430338,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ]}