{"pageNumber":"849","pageRowStart":"21200","pageSize":"25","recordCount":68934,"records":[{"id":70035129,"text":"70035129 - 2009 - Analysis of methods to estimate spring flows in a karst aquifer","interactions":[],"lastModifiedDate":"2012-03-12T17:21:54","indexId":"70035129","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"Analysis of methods to estimate spring flows in a karst aquifer","docAbstract":"Hydraulically and statistically based methods were analyzed to identify the most reliable method to predict spring flows in a karst aquifer. Measured water levels at nearby observation wells, measured spring pool altitudes, and the distance between observation wells and the spring pool were the parameters used to match measured spring flows. Measured spring flows at six Upper Floridan aquifer springs in central Florida were used to assess the reliability of these methods to predict spring flows. Hydraulically based methods involved the application of the Theis, Hantush-Jacob, and Darcy-Weisbach equations, whereas the statistically based methods were the multiple linear regressions and the technology of artificial neural networks (ANNs). Root mean square errors between measured and predicted spring flows using the Darcy-Weisbach method ranged between 5% and 15% of the measured flows, lower than the 7% to 27% range for the Theis or Hantush-Jacob methods. Flows at all springs were estimated to be turbulent based on the Reynolds number derived from the Darcy-Weisbach equation for conduit flow. The multiple linear regression and the Darcy-Weisbach methods had similar spring flow prediction capabilities. The ANNs provided the lowest residuals between measured and predicted spring flows, ranging from 1.6% to 5.3% of the measured flows. The model prediction efficiency criteria also indicated that the ANNs were the most accurate method predicting spring flows in a karst aquifer. ?? 2008 National Ground Water Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1745-6584.2008.00498.x","issn":"0017467X","usgsCitation":"Sepulveda, N., 2009, Analysis of methods to estimate spring flows in a karst aquifer: Ground Water, v. 47, no. 3, p. 337-349, https://doi.org/10.1111/j.1745-6584.2008.00498.x.","startPage":"337","endPage":"349","numberOfPages":"13","costCenters":[],"links":[{"id":215116,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6584.2008.00498.x"},{"id":242892,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"47","issue":"3","noUsgsAuthors":false,"publicationDate":"2009-04-27","publicationStatus":"PW","scienceBaseUri":"5059eb20e4b0c8380cd48c37","contributors":{"authors":[{"text":"Sepulveda, N.","contributorId":56805,"corporation":false,"usgs":true,"family":"Sepulveda","given":"N.","email":"","affiliations":[],"preferred":false,"id":449423,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70034764,"text":"70034764 - 2009 - Reducing streamflow forecast uncertainty: Application and qualitative assessment of the upper klamath river Basin, Oregon","interactions":[],"lastModifiedDate":"2012-03-12T17:21:42","indexId":"70034764","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2529,"text":"Journal of the American Water Resources Association","active":true,"publicationSubtype":{"id":10}},"title":"Reducing streamflow forecast uncertainty: Application and qualitative assessment of the upper klamath river Basin, Oregon","docAbstract":"The accuracy of streamflow forecasts depends on the uncertainty associated with future weather and the accuracy of the hydrologic model that is used to produce the forecasts. We present a method for streamflow forecasting where hydrologic model parameters are selected based on the climate state. Parameter sets for a hydrologic model are conditioned on an atmospheric pressure index defined using mean November through February (NDJF) 700-hectoPascal geopotential heights over northwestern North America [Pressure Index from Geopotential heights (PIG)]. The hydrologic model is applied in the Sprague River basin (SRB), a snowmelt-dominated basin located in the Upper Klamath basin in Oregon. In the SRB, the majority of streamflow occurs during March through May (MAM). Water years (WYs) 1980-2004 were divided into three groups based on their respective PIG values (high, medium, and low PIG). Low (high) PIG years tend to have higher (lower) than average MAM streamflow. Four parameter sets were calibrated for the SRB, each using a different set of WYs. The initial set used WYs 1995-2004 and the remaining three used WYs defined as high-, medium-, and low-PIG years. Two sets of March, April, and May streamflow volume forecasts were made using Ensemble Streamflow Prediction (ESP). The first set of ESP simulations used the initial parameter set. Because the PIG is defined using NDJF pressure heights, forecasts starting in March can be made using the PIG parameter set that corresponds with the year being forecasted. The second set of ESP simulations used the parameter set associated with the given PIG year. Comparison of the ESP sets indicates that more accuracy and less variability in volume forecasts may be possible when the ESP is conditioned using the PIG. This is especially true during the high-PIG years (low-flow years). ?? 2009 American Water Resources Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of the American Water Resources Association","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1752-1688.2009.00307.x","issn":"1093474X","usgsCitation":"Hay, L., McCabe, G., Clark, M., and Risley, J.C., 2009, Reducing streamflow forecast uncertainty: Application and qualitative assessment of the upper klamath river Basin, Oregon: Journal of the American Water Resources Association, v. 45, no. 3, p. 580-596, https://doi.org/10.1111/j.1752-1688.2009.00307.x.","startPage":"580","endPage":"596","numberOfPages":"17","costCenters":[],"links":[{"id":215728,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1752-1688.2009.00307.x"},{"id":243550,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"3","noUsgsAuthors":false,"publicationDate":"2009-05-26","publicationStatus":"PW","scienceBaseUri":"50e4a3d1e4b0e8fec6cdb9b1","contributors":{"authors":[{"text":"Hay, L.E.","contributorId":54253,"corporation":false,"usgs":true,"family":"Hay","given":"L.E.","email":"","affiliations":[],"preferred":false,"id":447478,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McCabe, G.J. 0000-0002-9258-2997","orcid":"https://orcid.org/0000-0002-9258-2997","contributorId":12961,"corporation":false,"usgs":true,"family":"McCabe","given":"G.J.","affiliations":[],"preferred":false,"id":447476,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Clark, M.P.","contributorId":49558,"corporation":false,"usgs":true,"family":"Clark","given":"M.P.","affiliations":[],"preferred":false,"id":447477,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Risley, J. C.","contributorId":88780,"corporation":false,"usgs":true,"family":"Risley","given":"J.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":447479,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70035966,"text":"70035966 - 2009 - Assessing the impact of land use change on hydrology by ensemble modeling (LUCHEM). I: Model intercomparison with current land use","interactions":[],"lastModifiedDate":"2012-03-12T17:21:51","indexId":"70035966","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":664,"text":"Advances in Water Resources","active":true,"publicationSubtype":{"id":10}},"title":"Assessing the impact of land use change on hydrology by ensemble modeling (LUCHEM). I: Model intercomparison with current land use","docAbstract":"This paper introduces the project on 'Assessing the impact of land use change on hydrology by ensemble modeling (LUCHEM)' that aims at investigating the envelope of predictions on changes in hydrological fluxes due to land use change. As part of a series of four papers, this paper outlines the motivation and setup of LUCHEM, and presents a model intercomparison for the present-day simulation results. Such an intercomparison provides a valuable basis to investigate the effects of different model structures on model predictions and paves the ground for the analysis of the performance of multi-model ensembles and the reliability of the scenario predictions in companion papers. In this study, we applied a set of 10 lumped, semi-lumped and fully distributed hydrological models that have been previously used in land use change studies to the low mountainous Dill catchment, Germany. Substantial differences in model performance were observed with Nash-Sutcliffe efficiencies ranging from 0.53 to 0.92. Differences in model performance were attributed to (1) model input data, (2) model calibration and (3) the physical basis of the models. The models were applied with two sets of input data: an original and a homogenized data set. This homogenization of precipitation, temperature and leaf area index was performed to reduce the variation between the models. Homogenization improved the comparability of model simulations and resulted in a reduced average bias, although some variation in model data input remained. The effect of the physical differences between models on the long-term water balance was mainly attributed to differences in how models represent evapotranspiration. Semi-lumped and lumped conceptual models slightly outperformed the fully distributed and physically based models. This was attributed to the automatic model calibration typically used for this type of models. Overall, however, we conclude that there was no superior model if several measures of model performance are considered and that all models are suitable to participate in further multi-model ensemble set-ups and land use change scenario investigations. ?? 2008 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Advances in Water Resources","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.advwatres.2008.10.003","issn":"03091708","usgsCitation":"Breuer, L., Huisman, J.A., Willems, P., Bormann, H., Bronstert, A., Croke, B., Frede, H., Graff, T., Hubrechts, L., Jakeman, A., Kite, G., Lanini, J., Leavesley, G., Lettenmaier, D., Lindstrom, G., Seibert, J., Sivapalan, M., and Viney, N., 2009, Assessing the impact of land use change on hydrology by ensemble modeling (LUCHEM). I: Model intercomparison with current land use: Advances in Water Resources, v. 32, no. 2, p. 129-146, https://doi.org/10.1016/j.advwatres.2008.10.003.","startPage":"129","endPage":"146","numberOfPages":"18","costCenters":[],"links":[{"id":216062,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.advwatres.2008.10.003"},{"id":243903,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"32","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059edebe4b0c8380cd49adb","contributors":{"authors":[{"text":"Breuer, L.","contributorId":54814,"corporation":false,"usgs":true,"family":"Breuer","given":"L.","email":"","affiliations":[],"preferred":false,"id":453367,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Huisman, J. A.","contributorId":86591,"corporation":false,"usgs":false,"family":"Huisman","given":"J.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":453373,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Willems, P.","contributorId":57685,"corporation":false,"usgs":true,"family":"Willems","given":"P.","email":"","affiliations":[],"preferred":false,"id":453369,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bormann, H.","contributorId":66091,"corporation":false,"usgs":true,"family":"Bormann","given":"H.","email":"","affiliations":[],"preferred":false,"id":453372,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Bronstert, A.","contributorId":98565,"corporation":false,"usgs":true,"family":"Bronstert","given":"A.","email":"","affiliations":[],"preferred":false,"id":453376,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Croke, B.F.W.","contributorId":52809,"corporation":false,"usgs":true,"family":"Croke","given":"B.F.W.","affiliations":[],"preferred":false,"id":453366,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Frede, H.-G.","contributorId":23783,"corporation":false,"usgs":true,"family":"Frede","given":"H.-G.","email":"","affiliations":[],"preferred":false,"id":453363,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Graff, T.","contributorId":15803,"corporation":false,"usgs":true,"family":"Graff","given":"T.","email":"","affiliations":[],"preferred":false,"id":453362,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Hubrechts, L.","contributorId":54815,"corporation":false,"usgs":true,"family":"Hubrechts","given":"L.","email":"","affiliations":[],"preferred":false,"id":453368,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Jakeman, A.J.","contributorId":12639,"corporation":false,"usgs":true,"family":"Jakeman","given":"A.J.","email":"","affiliations":[],"preferred":false,"id":453361,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Kite, G.","contributorId":11443,"corporation":false,"usgs":true,"family":"Kite","given":"G.","email":"","affiliations":[],"preferred":false,"id":453359,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Lanini, J.","contributorId":89745,"corporation":false,"usgs":true,"family":"Lanini","given":"J.","email":"","affiliations":[],"preferred":false,"id":453374,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Leavesley, G.","contributorId":90483,"corporation":false,"usgs":true,"family":"Leavesley","given":"G.","email":"","affiliations":[],"preferred":false,"id":453375,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Lettenmaier, D.P.","contributorId":61175,"corporation":false,"usgs":true,"family":"Lettenmaier","given":"D.P.","email":"","affiliations":[],"preferred":false,"id":453371,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Lindstrom, G.","contributorId":27292,"corporation":false,"usgs":true,"family":"Lindstrom","given":"G.","email":"","affiliations":[],"preferred":false,"id":453364,"contributorType":{"id":1,"text":"Authors"},"rank":15},{"text":"Seibert, J.","contributorId":37513,"corporation":false,"usgs":true,"family":"Seibert","given":"J.","email":"","affiliations":[],"preferred":false,"id":453365,"contributorType":{"id":1,"text":"Authors"},"rank":16},{"text":"Sivapalan, M.","contributorId":59587,"corporation":false,"usgs":true,"family":"Sivapalan","given":"M.","email":"","affiliations":[],"preferred":false,"id":453370,"contributorType":{"id":1,"text":"Authors"},"rank":17},{"text":"Viney, N.R.","contributorId":11850,"corporation":false,"usgs":true,"family":"Viney","given":"N.R.","email":"","affiliations":[],"preferred":false,"id":453360,"contributorType":{"id":1,"text":"Authors"},"rank":18}]}}
,{"id":70035131,"text":"70035131 - 2009 - Using nitrate dual isotopic composition (δ15N and δ18O) as a tool for exploring sources and cycling of nitrate in an estuarine system: Elkhorn Slough, California","interactions":[],"lastModifiedDate":"2018-09-27T10:58:17","indexId":"70035131","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2319,"text":"Journal of Geophysical Research G: Biogeosciences","active":true,"publicationSubtype":{"id":10}},"title":"Using nitrate dual isotopic composition (δ15N and δ18O) as a tool for exploring sources and cycling of nitrate in an estuarine system: Elkhorn Slough, California","docAbstract":"<p><span>Nitrate (NO</span><sub>3</sub><sup>−</sup><span>) concentrations and dual isotopic composition (</span><i>δ</i><sup>15</sup><span>N and&nbsp;</span><i>δ</i><sup>18</sup><span>O) were measured during various seasons and tidal conditions in Elkhorn Slough to evaluate mixing of sources of NO</span><sub>3</sub><sup>−</sup><span>&nbsp;within this California estuary. We found the isotopic composition of NO</span><sub>3</sub><sup>−</sup><span>&nbsp;was influenced most heavily by mixing of two primary sources with unique isotopic signatures, a marine (Monterey Bay) and terrestrial agricultural runoff source (Old Salinas River). However, our attempt to use a simple two end‐member mixing model to calculate the relative contribution of these two NO</span><sub>3</sub><sup>−</sup><span>&nbsp;sources to the Slough was complicated by periods of nonconservative behavior and/or the presence of additional sources, particularly during the dry season when NO</span><sub>3</sub><sup>−</sup><span>&nbsp;concentrations were low. Although multiple linear regression generally yielded good fits to the observed data, deviations from conservative mixing were still evident. After consideration of potential alternative sources, we concluded that deviations from two end‐member mixing were most likely derived from interactions with marsh sediments in regions of the Slough where high rates of NO</span><sub>3</sub><sup>−</sup><span>&nbsp;uptake and nitrification result in NO</span><sub>3</sub><sup>−</sup><span>&nbsp;with low&nbsp;</span><i>δ</i><sup>15</sup><span>N and high&nbsp;</span><i>δ</i><sup>18</sup><span>O values. A simple steady state dual isotope model is used to illustrate the impact of cycling processes in an estuarine setting which may play a primary role in controlling NO</span><sub>3</sub><sup>−</sup><span>&nbsp;isotopic composition when and where cycling rates and water residence times are high. This work expands our understanding of nitrogen and oxygen isotopes as biogeochemical tools for investigating NO</span><sub>3</sub><sup>−</sup><span>&nbsp;sources and cycling in estuaries, emphasizing the role that cycling processes may play in altering isotopic composition.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2008JG000729","issn":"01480227","usgsCitation":"Wankel, S.D., Kendall, C., and Paytan, A., 2009, Using nitrate dual isotopic composition (δ15N and δ18O) as a tool for exploring sources and cycling of nitrate in an estuarine system: Elkhorn Slough, California: Journal of Geophysical Research G: Biogeosciences, v. 114, no. 1, https://doi.org/10.1029/2008JG000729.","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":242926,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":215148,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2008JG000729"}],"country":"United States","state":"California","otherGeospatial":"Elkhorn Slough","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -121.83151245117186,\n              36.79279036766672\n            ],\n            [\n              -121.83151245117186,\n              36.88071909009633\n            ],\n            [\n              -121.67907714843751,\n              36.88071909009633\n            ],\n            [\n              -121.67907714843751,\n              36.79279036766672\n            ],\n            [\n              -121.83151245117186,\n              36.79279036766672\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"114","issue":"1","noUsgsAuthors":false,"publicationDate":"2009-02-17","publicationStatus":"PW","scienceBaseUri":"505bc07fe4b08c986b32a168","contributors":{"authors":[{"text":"Wankel, Scott D.","contributorId":98076,"corporation":false,"usgs":true,"family":"Wankel","given":"Scott","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":449435,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"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":449434,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Paytan, Adina","contributorId":75242,"corporation":false,"usgs":true,"family":"Paytan","given":"Adina","affiliations":[],"preferred":false,"id":449436,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70035134,"text":"70035134 - 2009 - Regional nutrient trends in streams and rivers of the United States, 1993-2003","interactions":[],"lastModifiedDate":"2017-01-18T14:01:43","indexId":"70035134","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","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":"Regional nutrient trends in streams and rivers of the United States, 1993-2003","docAbstract":"Trends in flow-adjusted concentrations (indicators of anthropogenic changes) and observed concentrations (indicators of natural and anthropogenic changes) of total phosphorus and total nitrogen from 1993 to 2003 were evaluated in the eastern, central, and western United States by adapting the Regional Kendall trend test to account for seasonality and spatial correlation. The only significant regional trend was an increase in flow-adjusted concentrations of total phosphorus in the central United States, which corresponded to increases in phosphorus inputs from fertilizer in the region, particularly west of the Mississippi River. A similar upward regional trend in observed total phosphorus concentrations in the central United States was not found, likely because precipitation and runoff decreased during drought conditions in the region, offsetting the increased source loading on the land surface. A greater number of regional trends would have been significant if spatial correlation had been disregarded, indicating the importance of spatial correlation modifications in regional trend assessments when sites are not spatially independent.","language":"English","publisher":"ACS Publications","doi":"10.1021/es803664x","issn":"0013936X","usgsCitation":"Sprague, L.A., and Lorenz, D.L., 2009, Regional nutrient trends in streams and rivers of the United States, 1993-2003: Environmental Science & Technology, v. 43, no. 10, p. 3430-3435, https://doi.org/10.1021/es803664x.","productDescription":"6 p.","startPage":"3430","endPage":"3435","numberOfPages":"6","costCenters":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true}],"links":[{"id":476427,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1021/es803664x","text":"Publisher Index Page"},{"id":242963,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":215181,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1021/es803664x"}],"volume":"43","issue":"10","noUsgsAuthors":false,"publicationDate":"2009-04-07","publicationStatus":"PW","scienceBaseUri":"50e4a53ee4b0e8fec6cdbdb4","contributors":{"authors":[{"text":"Sprague, Lori A. 0000-0003-2832-6662 lsprague@usgs.gov","orcid":"https://orcid.org/0000-0003-2832-6662","contributorId":726,"corporation":false,"usgs":true,"family":"Sprague","given":"Lori","email":"lsprague@usgs.gov","middleInitial":"A.","affiliations":[{"id":509,"text":"Office of the Associate Director for Water","active":true,"usgs":true},{"id":451,"text":"National Water Quality Assessment Program","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":27111,"text":"National Water Quality Program","active":true,"usgs":true}],"preferred":true,"id":449442,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lorenz, David L. 0000-0003-3392-4034 lorenz@usgs.gov","orcid":"https://orcid.org/0000-0003-3392-4034","contributorId":1384,"corporation":false,"usgs":true,"family":"Lorenz","given":"David","email":"lorenz@usgs.gov","middleInitial":"L.","affiliations":[{"id":392,"text":"Minnesota Water Science Center","active":true,"usgs":true}],"preferred":true,"id":449441,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70035223,"text":"70035223 - 2009 - Water level observations in mangrove swamps during two hurricanes in Florida","interactions":[],"lastModifiedDate":"2017-02-17T14:12:35","indexId":"70035223","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3750,"text":"Wetlands","onlineIssn":"1943-6246","printIssn":"0277-5212","active":true,"publicationSubtype":{"id":10}},"title":"Water level observations in mangrove swamps during two hurricanes in Florida","docAbstract":"<p>Little is known about the effectiveness of mangroves in suppressing water level heights during landfall of tropical storms and hurricanes. Recent hurricane strikes along the Gulf Coast of the United States have impacted wetland integrity in some areas and hastened the need to understand how and to what degree coastal forested wetlands confer protection by reducing the height of peak water level. In recent years, U.S. Geological Survey Gulf Coast research projects in Florida have instrumented mangrove sites with continuous water level recorders. Our ad hoc network of water level recorders documented the rise, peak, and fall of water levels (?? 0.5 hr) from two hurricane events in 2004 and 2005. Reduction of peak water level heights from relatively in-line gages associated with one storm surge event indicated that mangrove wetlands can reduce water level height by as much as 9.4 cm/km inland over intact, relatively unchannelized expanses. During the other event, reductions were slightly less for mangroves along a river corridor. Estimates of water level attenuation were within the range reported in the literature but erred on the conservative side. These synoptic data from single storm events indicate that intact mangroves may support a protective role in reducing maximum water level height associated with surge.</p>","language":"English","publisher":"Springer","doi":"10.1672/07-232.1","issn":"02775212","usgsCitation":"Krauss, K., Doyle, T., Doyle, T., Swarzenski, C., From, A., Day, R.H., and Conner, W., 2009, Water level observations in mangrove swamps during two hurricanes in Florida: Wetlands, v. 29, no. 1, p. 142-149, https://doi.org/10.1672/07-232.1.","productDescription":"8 p.","startPage":"142","endPage":"149","costCenters":[],"links":[{"id":243357,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"29","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc7fae4b08c986b32c70d","contributors":{"authors":[{"text":"Krauss, K. W. 0000-0003-2195-0729","orcid":"https://orcid.org/0000-0003-2195-0729","contributorId":19517,"corporation":false,"usgs":true,"family":"Krauss","given":"K. W.","affiliations":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"preferred":true,"id":449802,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Doyle, T.W. 0000-0001-5754-0671","orcid":"https://orcid.org/0000-0001-5754-0671","contributorId":16783,"corporation":false,"usgs":true,"family":"Doyle","given":"T.W.","affiliations":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"preferred":true,"id":449801,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Doyle, T.J.","contributorId":103489,"corporation":false,"usgs":true,"family":"Doyle","given":"T.J.","email":"","affiliations":[],"preferred":false,"id":449807,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Swarzenski, C.M.","contributorId":74856,"corporation":false,"usgs":true,"family":"Swarzenski","given":"C.M.","email":"","affiliations":[],"preferred":false,"id":449806,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"From, A.S. 0000-0002-6543-2627","orcid":"https://orcid.org/0000-0002-6543-2627","contributorId":34346,"corporation":false,"usgs":true,"family":"From","given":"A.S.","affiliations":[],"preferred":false,"id":449803,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Day, Richard H. 0000-0002-5959-7054 dayr@usgs.gov","orcid":"https://orcid.org/0000-0002-5959-7054","contributorId":2427,"corporation":false,"usgs":true,"family":"Day","given":"Richard","email":"dayr@usgs.gov","middleInitial":"H.","affiliations":[{"id":455,"text":"National Wetlands Research Center","active":true,"usgs":true},{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"preferred":true,"id":449805,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Conner, W.H.","contributorId":54165,"corporation":false,"usgs":true,"family":"Conner","given":"W.H.","email":"","affiliations":[],"preferred":false,"id":449804,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70032847,"text":"70032847 - 2009 - Influence of groundwater recharge and well characteristics on dissolved arsenic concentrations in southeastern Michigan groundwater","interactions":[],"lastModifiedDate":"2012-03-12T17:21:23","indexId":"70032847","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1538,"text":"Environmental Geochemistry and Health","active":true,"publicationSubtype":{"id":10}},"title":"Influence of groundwater recharge and well characteristics on dissolved arsenic concentrations in southeastern Michigan groundwater","docAbstract":"Arsenic concentrations exceeding 10 ??g/l, the United States maximum contaminant level and the World Health Organization guideline value, are frequently reported in groundwater from bedrock and unconsolidated aquifers of southeastern Michigan. Although arsenic-bearing minerals (including arsenian pyrite and oxide/hydroxide phases) have been identified in Marshall Sandstone bedrock of the Mississippian aquifer system and in tills of the unconsolidated aquifer system, mechanisms responsible for arsenic mobilization and subsequent transport in groundwater are equivocal. Recent evidence has begun to suggest that groundwater recharge and characteristics of well construction may affect arsenic mobilization and transport. Therefore, we investigated the relationship between dissolved arsenic concentrations, reported groundwater recharge rates, well construction characteristics, and geology in unconsolidated and bedrock aquifers. Results of multiple linear regression analyses indicate that arsenic contamination is more prevalent in bedrock wells that are cased in proximity to the bedrock-unconsolidated interface; no other factors were associated with arsenic contamination in water drawn from bedrock or unconsolidated aquifers. Conditions appropriate for arsenic mobilization may be found along the bedrock-unconsolidated interface, including changes in reduction/oxidation potential and enhanced biogeochemical activity because of differences between geologic strata. These results are valuable for understanding arsenic mobilization and guiding well construction practices in southeastern Michigan, and may also provide insights for other regions faced with groundwater arsenic contamination. ?? Springer-Verlag 2008.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Geochemistry and Health","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10653-008-9173-x","issn":"02694","usgsCitation":"Meliker, J., Slotnick, M., Avruskin, G., Haack, S., and Nriagu, J.O., 2009, Influence of groundwater recharge and well characteristics on dissolved arsenic concentrations in southeastern Michigan groundwater: Environmental Geochemistry and Health, v. 31, no. 1, p. 147-157, https://doi.org/10.1007/s10653-008-9173-x.","startPage":"147","endPage":"157","numberOfPages":"11","costCenters":[],"links":[{"id":214022,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10653-008-9173-x"},{"id":241708,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"31","issue":"1","noUsgsAuthors":false,"publicationDate":"2008-05-22","publicationStatus":"PW","scienceBaseUri":"505a3b3ee4b0c8380cd62361","contributors":{"authors":[{"text":"Meliker, J.R.","contributorId":56456,"corporation":false,"usgs":true,"family":"Meliker","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":438214,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Slotnick, M.J.","contributorId":38373,"corporation":false,"usgs":true,"family":"Slotnick","given":"M.J.","email":"","affiliations":[],"preferred":false,"id":438212,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Avruskin, G.A.","contributorId":30463,"corporation":false,"usgs":true,"family":"Avruskin","given":"G.A.","email":"","affiliations":[],"preferred":false,"id":438211,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Haack, S.K.","contributorId":26457,"corporation":false,"usgs":true,"family":"Haack","given":"S.K.","email":"","affiliations":[],"preferred":false,"id":438210,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Nriagu, J. O.","contributorId":46316,"corporation":false,"usgs":true,"family":"Nriagu","given":"J.","email":"","middleInitial":"O.","affiliations":[],"preferred":false,"id":438213,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70034286,"text":"70034286 - 2009 - First-order exchange coefficient coupling for simulating surface water-groundwater interactions: Parameter sensitivity and consistency with a physics-based approach","interactions":[],"lastModifiedDate":"2012-03-12T17:21:46","indexId":"70034286","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","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":"First-order exchange coefficient coupling for simulating surface water-groundwater interactions: Parameter sensitivity and consistency with a physics-based approach","docAbstract":"Distributed hydrologic models capable of simulating fully-coupled surface water and groundwater flow are increasingly used to examine problems in the hydrologic sciences. Several techniques are currently available to couple the surface and subsurface; the two most frequently employed approaches are first-order exchange coefficients (a.k.a., the surface conductance method) and enforced continuity of pressure and flux at the surface-subsurface boundary condition. The effort reported here examines the parameter sensitivity of simulated hydrologic response for the first-order exchange coefficients at a well-characterized field site using the fully coupled Integrated Hydrology Model (InHM). This investigation demonstrates that the first-order exchange coefficients can be selected such that the simulated hydrologic response is insensitive to the parameter choice, while simulation time is considerably reduced. Alternatively, the ability to choose a first-order exchange coefficient that intentionally decouples the surface and subsurface facilitates concept-development simulations to examine real-world situations where the surface-subsurface exchange is impaired. While the parameters comprising the first-order exchange coefficient cannot be directly estimated or measured, the insensitivity of the simulated flow system to these parameters (when chosen appropriately) combined with the ability to mimic actual physical processes suggests that the first-order exchange coefficient approach can be consistent with a physics-based framework. Copyright ?? 2009 John Wiley & Sons, Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrological Processes","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/hyp.7279","issn":"08856087","usgsCitation":"Ebel, B., Mirus, B., Heppner, C., VanderKwaak, J., and Loague, K., 2009, First-order exchange coefficient coupling for simulating surface water-groundwater interactions: Parameter sensitivity and consistency with a physics-based approach: Hydrological Processes, v. 23, no. 13, p. 1949-1959, https://doi.org/10.1002/hyp.7279.","startPage":"1949","endPage":"1959","numberOfPages":"11","costCenters":[],"links":[{"id":244586,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216700,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/hyp.7279"}],"volume":"23","issue":"13","noUsgsAuthors":false,"publicationDate":"2009-03-30","publicationStatus":"PW","scienceBaseUri":"505a106ce4b0c8380cd53c77","contributors":{"authors":[{"text":"Ebel, B.A.","contributorId":87772,"corporation":false,"usgs":true,"family":"Ebel","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":445085,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mirus, B.B.","contributorId":68128,"corporation":false,"usgs":true,"family":"Mirus","given":"B.B.","affiliations":[],"preferred":false,"id":445083,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Heppner, C.S.","contributorId":37147,"corporation":false,"usgs":true,"family":"Heppner","given":"C.S.","affiliations":[],"preferred":false,"id":445082,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"VanderKwaak, J.E.","contributorId":103497,"corporation":false,"usgs":true,"family":"VanderKwaak","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":445086,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Loague, K.","contributorId":77307,"corporation":false,"usgs":true,"family":"Loague","given":"K.","affiliations":[],"preferred":false,"id":445084,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70032942,"text":"70032942 - 2009 - Molecular detection of native and invasive marine invertebrate larvae present in ballast and open water environmental samples collected in Puget Sound","interactions":[],"lastModifiedDate":"2012-03-12T17:21:36","indexId":"70032942","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2277,"text":"Journal of Experimental Marine Biology and Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Molecular detection of native and invasive marine invertebrate larvae present in ballast and open water environmental samples collected in Puget Sound","docAbstract":"Non-native marine species have been and continue to be introduced into Puget Sound via several vectors including ship's ballast water. Some non-native species become invasive and negatively impact native species or near shore habitats. We present a new methodology for the development and testing of taxon specific PCR primers designed to assess environmental samples of ocean water for the presence of native and non-native bivalves, crustaceans and algae. The intergenic spacer regions (IGS; ITS1, ITS2 and 5.8S) of the ribosomal DNA were sequenced for adult samples of each taxon studied. We used these data along with those available in Genbank to design taxon and group specific primers and tested their stringency against artificial populations of plasmid constructs containing the entire IGS region for each of the 25 taxa in our study, respectively. Taxon and group specific primer sets were then used to detect the presence or absence of native and non-native planktonic life-history stages (propagules) from environmental samples of ballast water and plankton tow net samples collected in Puget Sound. This methodology provides an inexpensive and efficient way to test the discriminatory ability of taxon specific oligonucleotides (PCR primers) before creating molecular probes or beacons for use in molecular ecological applications such as probe hybridizations or microarray analyses. This work addresses the current need to develop molecular tools capable of diagnosing the presence of planktonic life-history stages from non-native marine species (potential invaders) in ballast water and other environmental samples. ?? 2008 Elsevier B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Experimental Marine Biology and Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jembe.2008.10.030","issn":"00220","usgsCitation":"Harvey, J., Hoy, M., and Rodriguez, R.J., 2009, Molecular detection of native and invasive marine invertebrate larvae present in ballast and open water environmental samples collected in Puget Sound: Journal of Experimental Marine Biology and Ecology, v. 369, no. 2, p. 93-99, https://doi.org/10.1016/j.jembe.2008.10.030.","startPage":"93","endPage":"99","numberOfPages":"7","costCenters":[],"links":[{"id":241145,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213515,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jembe.2008.10.030"}],"volume":"369","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5cffe4b0c8380cd700b9","contributors":{"authors":[{"text":"Harvey, J.B.J.","contributorId":90116,"corporation":false,"usgs":true,"family":"Harvey","given":"J.B.J.","email":"","affiliations":[],"preferred":false,"id":438632,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hoy, M.S.","contributorId":85780,"corporation":false,"usgs":true,"family":"Hoy","given":"M.S.","email":"","affiliations":[],"preferred":false,"id":438631,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rodriguez, R. J.","contributorId":53107,"corporation":false,"usgs":false,"family":"Rodriguez","given":"R.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":438630,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70036050,"text":"70036050 - 2009 - Evidence for prolonged El Nino-like conditions in the Pacific during the Late Pleistocene: a 43 ka noble gas record from California groundwaters","interactions":[],"lastModifiedDate":"2018-09-19T09:17:41","indexId":"70036050","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3219,"text":"Quaternary Science Reviews","active":true,"publicationSubtype":{"id":10}},"title":"Evidence for prolonged El Nino-like conditions in the Pacific during the Late Pleistocene: a 43 ka noble gas record from California groundwaters","docAbstract":"Information on the ocean/atmosphere state over the period spanning the Last Glacial Maximum - from the Late Pleistocene to the Holocene - provides crucial constraints on the relationship between orbital forcing and global climate change. The Pacific Ocean is particularly important in this respect because of its dominant role in exporting heat and moisture from the tropics to higher latitudes. Through targeting groundwaters in the Mojave Desert, California, we show that noble gas derived temperatures in California averaged 4.2 ?? 1.1 ??C cooler in the Late Pleistocene (from ???43 to ???12 ka) compared to the Holocene (from ???10 to ???5 ka). Furthermore, the older groundwaters contain higher concentrations of excess air (entrained air bubbles) and have elevated oxygen-18/oxygen-16 ratios (??<sup>18</sup>O) - indicators of vigorous aquifer recharge, and greater rainfall amounts and/or more intense precipitation events, respectively. Together, these paleoclimate indicators reveal that cooler and wetter conditions prevailed in the Mojave Desert from ???43 to ???12 ka. We suggest that during the Late Pleistocene, the Pacific ocean/atmosphere state was similar to present-day El Nino-like patterns, and was characterized by prolonged periods of weak trade winds, weak upwelling along the eastern Pacific margin, and increased precipitation in the southwestern U.S.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Quaternary Science Reviews","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.quascirev.2009.05.008","issn":"02773791","usgsCitation":"Kulongoski, J., Hilton, D.R., Izbicki, J., and Belitz, K., 2009, Evidence for prolonged El Nino-like conditions in the Pacific during the Late Pleistocene: a 43 ka noble gas record from California groundwaters: Quaternary Science Reviews, v. 28, no. 23-24, p. 2465-2473, https://doi.org/10.1016/j.quascirev.2009.05.008.","startPage":"2465","endPage":"2473","numberOfPages":"9","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":246526,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":218509,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.quascirev.2009.05.008"}],"volume":"28","issue":"23-24","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0d4fe4b0c8380cd52f39","contributors":{"authors":[{"text":"Kulongoski, J.T. 0000-0002-3498-4154","orcid":"https://orcid.org/0000-0002-3498-4154","contributorId":61213,"corporation":false,"usgs":true,"family":"Kulongoski","given":"J.T.","affiliations":[],"preferred":false,"id":453787,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hilton, David R.","contributorId":37116,"corporation":false,"usgs":true,"family":"Hilton","given":"David","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":453786,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Izbicki, J. A. 0000-0003-0816-4408","orcid":"https://orcid.org/0000-0003-0816-4408","contributorId":28244,"corporation":false,"usgs":true,"family":"Izbicki","given":"J. A.","affiliations":[],"preferred":false,"id":453785,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Belitz, K. 0000-0003-4481-2345","orcid":"https://orcid.org/0000-0003-4481-2345","contributorId":10164,"corporation":false,"usgs":true,"family":"Belitz","given":"K.","affiliations":[],"preferred":false,"id":453784,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70035412,"text":"70035412 - 2009 - Contamination assessment in microbiological sampling of the Eyreville core, Chesapeake Bay impact structure","interactions":[],"lastModifiedDate":"2012-03-12T17:21:56","indexId":"70035412","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3459,"text":"Special Paper of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Contamination assessment in microbiological sampling of the Eyreville core, Chesapeake Bay impact structure","docAbstract":"Knowledge of the deep subsurface biosphere is limited due to difficulties in recovering materials. Deep drilling projects provide access to the subsurface; however, contamination introduced during drilling poses a major obstacle in obtaining clean samples. To monitor contamination during the 2005 International Continental Scientific Drilling Program (ICDP)-U.S. Geological Survey (USGS) deep drilling of the Chesapeake Bay impact structure, four methods were utilized. Fluorescent microspheres were used to mimic the ability of contaminant cells to enter samples through fractures in the core material during retrieval. Drilling mud was infused with a chemical tracer (Halon 1211) in order to monitor penetration of mud into cores. Pore water from samples was examined using excitation-emission matrix (EEM) fl uorescence spectroscopy to characterize dissolved organic carbon (DOC) present at various depths. DOC signatures at depth were compared to signatures from drilling mud in order to identify potential contamination. Finally, microbial contaminants present in drilling mud were identified through 16S ribosomal deoxyribonucleic acid (rDNA) clone libraries and compared to species cultured from core samples. Together, these methods allowed us to categorize the recovered core samples according to the likelihood of contamination. Twenty-two of the 47 subcores that were retrieved were free of contamination by all the methods used and were subsequently used for microbiological culture and culture-independent analysis. Our approach provides a comprehensive assessment of both particulate and dissolved contaminants that could be applied to any environment with low biomass. ?? 2009 The Geological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Special Paper of the Geological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/2009.2458(41)","issn":"00721077","usgsCitation":"Gronstal, A., Voytek, M., Kirshtein, J., Von der, H.N., Lowit, M., and Cockell, C., 2009, Contamination assessment in microbiological sampling of the Eyreville core, Chesapeake Bay impact structure: Special Paper of the Geological Society of America, no. 458, p. 951-964, https://doi.org/10.1130/2009.2458(41).","startPage":"951","endPage":"964","numberOfPages":"14","costCenters":[],"links":[{"id":215318,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/2009.2458(41)"},{"id":243113,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"458","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fa44e4b0c8380cd4d9ed","contributors":{"authors":[{"text":"Gronstal, A.L.","contributorId":72611,"corporation":false,"usgs":true,"family":"Gronstal","given":"A.L.","email":"","affiliations":[],"preferred":false,"id":450542,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Voytek, M.A.","contributorId":44272,"corporation":false,"usgs":true,"family":"Voytek","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":450540,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kirshtein, J. D.","contributorId":33479,"corporation":false,"usgs":true,"family":"Kirshtein","given":"J. D.","affiliations":[],"preferred":false,"id":450539,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Von der, Heyde N. M. N. M.","contributorId":84580,"corporation":false,"usgs":true,"family":"Von der","given":"Heyde","suffix":"N. M.","email":"","middleInitial":"N. M.","affiliations":[],"preferred":false,"id":450543,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Lowit, M.D.","contributorId":85787,"corporation":false,"usgs":true,"family":"Lowit","given":"M.D.","email":"","affiliations":[],"preferred":false,"id":450544,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Cockell, C.S.","contributorId":66830,"corporation":false,"usgs":true,"family":"Cockell","given":"C.S.","email":"","affiliations":[],"preferred":false,"id":450541,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70034771,"text":"70034771 - 2009 - Geophysical investigation of seamounts near the Ogasawara fracture zone, western Pacific","interactions":[],"lastModifiedDate":"2013-01-17T22:04:14","indexId":"70034771","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1430,"text":"Earth, Planets and Space","active":true,"publicationSubtype":{"id":10}},"title":"Geophysical investigation of seamounts near the Ogasawara fracture zone, western Pacific","docAbstract":"This paper provides an analysis of multi-channel seismic data obtained during 2000-2001 on seamounts near the Ogasawara Fracture Zone (OFZ) northwest of the Marshall Islands in the western Pacific. The OFZ is unique in that it is a wide rift zone that includes many seamounts. Seven units are delineated on the basis of acoustic characteristics and depth: three units (I, II, and III) on the summit of seamounts and four units (IV, V, VI, and VII) in basins. Acoustic characteristics of layers on the summit of guyots and dredged samples indicate that the seamounts had been built above sea level by volcanism. This was followed by reef growth along the summit margin, which enabled deposition of shallow-water carbonates on the summit, and finally by subsidence of the edifices. The subsidence depth of the seamounts, estimated from the lower boundary of unit II, ranges between 1,550 and 2,040 m. The thick unit I of the southern seamounts is correlated with proximity to the equatorial high productivity zone, whereas local currents may have strongly affected the distribution of unit I on northern seamounts. A seismic profile in the basin around the Ita Mai Tai and OSM4 seamounts shows an unconformity between units IV and V, which is widespread from the East Mariana Basin to the Pigafetta Basin. Copyright ?? The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences; TERRAPUB.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Earth, Planets and Space","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"13438832","usgsCitation":"Lee, T., Lee, K., Hein, J., and Moon, J., 2009, Geophysical investigation of seamounts near the Ogasawara fracture zone, western Pacific: Earth, Planets and Space, v. 61, no. 3, p. 319-331.","startPage":"319","endPage":"331","numberOfPages":"13","costCenters":[],"links":[{"id":243672,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":265848,"type":{"id":11,"text":"Document"},"url":"https://svr4.terrapub.co.jp/journals/EPS/pdf/2009/6103/61030319.pdf"}],"volume":"61","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a282ae4b0c8380cd59eb2","contributors":{"authors":[{"text":"Lee, T.-G.","contributorId":80895,"corporation":false,"usgs":true,"family":"Lee","given":"T.-G.","email":"","affiliations":[],"preferred":false,"id":447513,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lee, Kenneth","contributorId":61064,"corporation":false,"usgs":true,"family":"Lee","given":"Kenneth","affiliations":[],"preferred":false,"id":447511,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hein, J.R. 0000-0002-5321-899X","orcid":"https://orcid.org/0000-0002-5321-899X","contributorId":61429,"corporation":false,"usgs":true,"family":"Hein","given":"J.R.","affiliations":[],"preferred":false,"id":447512,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Moon, J.-W.","contributorId":47968,"corporation":false,"usgs":true,"family":"Moon","given":"J.-W.","email":"","affiliations":[],"preferred":false,"id":447510,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70034472,"text":"70034472 - 2009 - Seed dispersal and seedling emergence in a created and a natural salt marsh on the Gulf of Mexico coast in Southwest Louisiana, U.S.A","interactions":[],"lastModifiedDate":"2012-03-12T17:21:39","indexId":"70034472","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3271,"text":"Restoration Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Seed dispersal and seedling emergence in a created and a natural salt marsh on the Gulf of Mexico coast in Southwest Louisiana, U.S.A","docAbstract":"Early regeneration dynamics related to seed dispersal and seedling emergence can contribute to differences in species composition among a created and a natural salt marsh. The objectives of this study were to determine (1) whether aquatic and aerial seed dispersal differed in low and high elevations within a created marsh and a natural marsh and (2) whether seedling emergence was influenced by marsh, the presence of openings in the vegetation, and seed availability along the northern Gulf of Mexico coast. Aerial seed traps captured a greater quantity of seeds than aquatic traps. Several factors influenced aquatic and aerial seed dispersal in a created and a natural salt marsh, including distance from the marsh edge, cover of existing vegetation, and water depth. The natural marsh had a high seed density of Spartina alterniflora and Distichlis spicata, the low-elevation created marsh had a high seed density of S. alterniflora, and the high-elevation created marsh had a high seed density of Aster subulatus and Iva frutescens. The presence of adult plants and water depth above the marsh surface influenced seed density. In the natural marsh, openings in vegetation increased seedling emergence for all species, whereas in the low-elevation created marsh, S. alterniflora had higher seedling density under a canopy of vegetation. According to the early regeneration dynamics, the future vegetation in areas of the low-elevation created marsh may become similar to that in the natural marsh. In the high-elevation created marsh, vegetation may be upland fringe habitat dominated by high-elevation marsh shrubs and annual herbaceous species. ?? 2009 Society for Ecological Restoration International.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Restoration Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1526-100X.2008.00398.x","issn":"10612971","usgsCitation":"Elsey-Quirk, T., Middleton, B., and Proffitt, C., 2009, Seed dispersal and seedling emergence in a created and a natural salt marsh on the Gulf of Mexico coast in Southwest Louisiana, U.S.A: Restoration Ecology, v. 17, no. 3, p. 422-432, https://doi.org/10.1111/j.1526-100X.2008.00398.x.","startPage":"422","endPage":"432","numberOfPages":"11","costCenters":[],"links":[{"id":215768,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1526-100X.2008.00398.x"},{"id":243592,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","issue":"3","noUsgsAuthors":false,"publicationDate":"2009-04-28","publicationStatus":"PW","scienceBaseUri":"505b8abde4b08c986b317348","contributors":{"authors":[{"text":"Elsey-Quirk, T.","contributorId":107959,"corporation":false,"usgs":true,"family":"Elsey-Quirk","given":"T.","affiliations":[],"preferred":false,"id":445984,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Middleton, B.A. 0000-0002-1220-2326 middletonb@usgs.gov","orcid":"https://orcid.org/0000-0002-1220-2326","contributorId":89108,"corporation":false,"usgs":true,"family":"Middleton","given":"B.A.","email":"middletonb@usgs.gov","affiliations":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"preferred":false,"id":445983,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Proffitt, C.E. 0000-0002-0845-8441","orcid":"https://orcid.org/0000-0002-0845-8441","contributorId":47339,"corporation":false,"usgs":true,"family":"Proffitt","given":"C.E.","email":"","affiliations":[],"preferred":false,"id":445982,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70034464,"text":"70034464 - 2009 - Paleosols in central Illinois as potential sources of ammonium in groundwater","interactions":[],"lastModifiedDate":"2012-03-12T17:21:44","indexId":"70034464","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1864,"text":"Ground Water Monitoring and Remediation","active":true,"publicationSubtype":{"id":10}},"title":"Paleosols in central Illinois as potential sources of ammonium in groundwater","docAbstract":"Glacially buried paleosols of pre-Holocene age were evaluated as potential sources for anomalously large concentrations of ammonium in groundwater in East Central Illinois. Ammonium has been detected at concentrations that are problematic to water treatment facilities (greater than 2.0 mg/L) in this region. Paleosols characterized for this study were of Quaternary age, specifically Robein Silt samples. Paleosol samples displayed significant capacity to both store and release ammonium through experiments measuring processes of sorption, ion exchange, and weathering. Bacteria and fungi within paleosols may significantly facilitate the leaching of ammonium into groundwater by the processes of assimilation and mineralization. Bacterial genetic material (DNA) was successfully extracted from the Robein Silt, purified, and amplified by polymerase chain reaction to produce 16S rRNA terminal restriction fragment length polymorphism (TRFLP) community analyses. The Robein Silt was found to have established diverse and viable bacterial communities. 16S rRNA TRFLP comparisons to well-known bacterial species yielded possible matches with facultative chemolithotrophs, cellulose consumers, nitrate reducers, and actinomycetes. It was concluded that the Robein Silt is both a source and reservoir for groundwater ammonium. Therefore, the occurrence of relatively large concentrations of ammonium in groundwater monitoring data may not necessarily be an indication of only anthropogenic contamination. The results of this study, however, need to be placed in a hydrological context to better understand whether paleosols can be a significant source of ammonium to drinking water supplies. ?? 2009 National Ground Water Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water Monitoring and Remediation","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1745-6592.2009.01257.x","issn":"10693629","usgsCitation":"Glessner, J.J., and Roy, W.R., 2009, Paleosols in central Illinois as potential sources of ammonium in groundwater: Ground Water Monitoring and Remediation, v. 29, no. 4, p. 56-64, https://doi.org/10.1111/j.1745-6592.2009.01257.x.","startPage":"56","endPage":"64","numberOfPages":"9","costCenters":[],"links":[{"id":216567,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6592.2009.01257.x"},{"id":244445,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"29","issue":"4","noUsgsAuthors":false,"publicationDate":"2009-11-03","publicationStatus":"PW","scienceBaseUri":"505a7455e4b0c8380cd775b6","contributors":{"authors":[{"text":"Glessner, Justin J. G.","contributorId":69391,"corporation":false,"usgs":true,"family":"Glessner","given":"Justin","email":"","middleInitial":"J. G.","affiliations":[],"preferred":false,"id":445940,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Roy, William R.","contributorId":45454,"corporation":false,"usgs":true,"family":"Roy","given":"William","middleInitial":"R.","affiliations":[],"preferred":false,"id":445939,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70034693,"text":"70034693 - 2009 - Currents in monterey submarine canyon","interactions":[],"lastModifiedDate":"2012-03-12T17:21:41","indexId":"70034693","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2315,"text":"Journal of Geophysical Research C: Oceans","active":true,"publicationSubtype":{"id":10}},"title":"Currents in monterey submarine canyon","docAbstract":"Flow fields of mean, subtidal, and tidal frequencies between 250 and 3300 m water depths in Monterey Submarine Canyon are examined using current measurements obtained in three yearlong field experiments. Spatial variations in flow fields are mainly controlled by the topography (shape and width) of the canyon. The mean currents flow upcanyon in the offshore reaches (>1000 m) and downcanyon in the shallow reaches (<800 m) of the canyon. Tidal currents, especially the semidiurnal components, are dominant and account for more than 90% of total energy. Pulses of strong currents near the canyon floor, which last several days at a time and have a magnitude as high as 60+ cm/s, are attributed to intense baroclinic processes occurring within the canyon. The V-shaped canyon walls and the near-critical slope of the canyon floor focus the baroclinic tides of semidiurnal and higher frequencies to the canyon bottom to produce the >100-m amplitude isotherm oscillations and associated high-speed rectilinear currents. The 15-day spring-neap cycle and a ???3-day??? band are the two prominent frequencies in subtidal flow field. Neither of them seems directly correlated with the spring-neap cycle of the sea level.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research C: Oceans","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2008JC004992","issn":"01480227","usgsCitation":"Xu, J.P., and Noble, M., 2009, Currents in monterey submarine canyon: Journal of Geophysical Research C: Oceans, v. 114, no. 3, https://doi.org/10.1029/2008JC004992.","costCenters":[],"links":[{"id":476396,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2008jc004992","text":"Publisher Index Page"},{"id":215632,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2008JC004992"},{"id":243449,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"114","issue":"3","noUsgsAuthors":false,"publicationDate":"2009-03-05","publicationStatus":"PW","scienceBaseUri":"5059fd1be4b0c8380cd4e62b","contributors":{"authors":[{"text":"Xu, J. P.","contributorId":74528,"corporation":false,"usgs":true,"family":"Xu","given":"J.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":447064,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Noble, M.A.","contributorId":93513,"corporation":false,"usgs":true,"family":"Noble","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":447065,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70035401,"text":"70035401 - 2009 - Constraints on the utility of MnO<sub>2</sub> cartridge method for the extraction of radionuclides: A case study using <sup>234</sup>Th","interactions":[],"lastModifiedDate":"2012-03-12T17:21:57","indexId":"70035401","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1757,"text":"Geochemistry, Geophysics, Geosystems","active":true,"publicationSubtype":{"id":10}},"title":"Constraints on the utility of MnO<sub>2</sub> cartridge method for the extraction of radionuclides: A case study using <sup>234</sup>Th","docAbstract":"[1] Large volume (10<sup>2</sup>-10<sup>3</sup> L) seawater samples are routinely processed to investigate the partitioning of particle reactive radionuclides and Ra between solution and size-fractionated suspended particulate matter. One of the most frequently used methods to preconcentrate these nuclides from such large volumes involves extraction onto three filter cartridges (a prefilter for particulate species and two MnO<sub>2</sub>-coated filters for dissolved species) connected in series. This method assumes that the extraction efficiency is uniform for both MnO<sub>2</sub>-coated cartridges, that no dissolved species are removed by the prefilter, and that any adsorbed radionuclides are not desorbed from the MnO<sub>2</sub>-coated cartridges during filtration. In this study, we utilized <sup>234</sup>Th-spiked coastal seawater and deionized water to address the removal of dissolved Th onto prefilters and MnO<sub>2</sub>-coated filter cartridges. Experimental results provide the first data that indicate (1) a small fraction of dissolved Th (&lt;6%) can be removed by the prefilter cartridge; (2) a small fraction of dissolved Th (&lt;5%) retained by the MnO<sub>2</sub> surface can also be desorbed, which undermines the assumption of uniform extraction efficiency for Th; and (3) the absolute and relative extraction efficiencies can vary widely. These experiments provide insight on the variability of the extraction efficiency of MnO <sub>2</sub>-coated filter cartridges by comparing the relative and absolute efficiencies and recommend the use of a constant efficiency on the combined activity from two filter cartridges connected in series for future studies of dissolved <sup>234</sup>Th and other radionuclides in natural waters using sequential filtration/extraction methods. ?? 2009 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geochemistry, Geophysics, Geosystems","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2008GC002340","issn":"15252027","usgsCitation":"Baskaran, M., Swarzenski, P., and Biddanda, B., 2009, Constraints on the utility of MnO<sub>2</sub> cartridge method for the extraction of radionuclides: A case study using <sup>234</sup>Th: Geochemistry, Geophysics, Geosystems, v. 10, no. 4, https://doi.org/10.1029/2008GC002340.","costCenters":[],"links":[{"id":476336,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2008gc002340","text":"Publisher Index Page"},{"id":215232,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2008GC002340"},{"id":243021,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"10","issue":"4","noUsgsAuthors":false,"publicationDate":"2009-04-22","publicationStatus":"PW","scienceBaseUri":"5059fa11e4b0c8380cd4d903","contributors":{"authors":[{"text":"Baskaran, M.","contributorId":96627,"corporation":false,"usgs":true,"family":"Baskaran","given":"M.","affiliations":[],"preferred":false,"id":450474,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Swarzenski, P.W. 0000-0003-0116-0578","orcid":"https://orcid.org/0000-0003-0116-0578","contributorId":29487,"corporation":false,"usgs":true,"family":"Swarzenski","given":"P.W.","affiliations":[],"preferred":false,"id":450472,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Biddanda, B.A.","contributorId":92881,"corporation":false,"usgs":true,"family":"Biddanda","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":450473,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70035686,"text":"70035686 - 2009 - A carbon, nitrogen, and sulfur elemental and isotopic study in dated sediment cores from the Louisiana Shelf","interactions":[],"lastModifiedDate":"2018-10-12T09:55:36","indexId":"70035686","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1742,"text":"Geo-Marine Letters","active":true,"publicationSubtype":{"id":10}},"title":"A carbon, nitrogen, and sulfur elemental and isotopic study in dated sediment cores from the Louisiana Shelf","docAbstract":"<p class=\"Para\">Three sediment cores were collected off the Mississippi River delta on the Louisiana Shelf at sites that are variably influenced by recurring, summer-time water-column hypoxia and fluvial loadings. The cores, with established chronology, were analyzed for their respective carbon, nitrogen, and sulfur elemental and isotopic composition to examine variable organic matter inputs, and to assess the sediment record for possible evidence of hypoxic events. Sediment from site MRJ03-3, which is located close to the Mississippi Canyon and generally not influenced by summer-time hypoxia, is typical of marine sediment in that it contains mostly marine algae and fine-grained material from the erosion of terrestrial C4 plants. Sediment from site MRJ03-2, located closer to the mouth of the Mississippi River and at the periphery of the hypoxic zone (annual recurrence of summer-time hypoxia &gt;50%), is similar in composition to core MRJ03-3, but exhibits more isotopic and elemental variability down-core, suggesting that this site is more directly influenced by river discharge. Site MRJ03-5 is located in an area of recurring hypoxia (annual recurrence &gt;75%), and is isotopically and elementally distinct from the other two cores. The carbon and nitrogen isotopic composition of this core prior to 1960 is similar to average particulate organic matter from the lower Mississippi River, and approaches the composition of C3 plants. This site likely receives a greater input of local terrestrial organic matter to the sediment. After 1960 and to the present, a gradual shift to higher values of δ<sup>13</sup>C and δ<sup>15</sup>N and lower C:N ratios suggests that algal input to these shelf sediments increased as a result of increased productivity and hypoxia. The values of C:S and δ<sup>34</sup>S reflect site-specific processes that may be influenced by the higher likelihood of recurring seasonal hypoxia. In particular, the temporal variations in the C:S and δ<sup>34</sup>S down-core are likely caused by changes in the rate of sulfate reduction, and hence the degree of hypoxia in the overlying water column. Based principally on the down-core C:N and C:S ratios and δ<sup>13</sup>C and δ<sup>34</sup>S profiles, sites MRJ03-3 and MRJ03-2 generally reflect more marine organic matter inputs, while site MRJ03-5 appears to be more influenced by terrestrial deposition.</p><div class=\"KeywordGroup\" lang=\"en\"><br data-mce-bogus=\"1\"></div>","language":"English","publisher":"Springer","doi":"10.1007/s00367-009-0151-9","issn":"02760460","usgsCitation":"Rosenbauer, R., Swarzenski, P., Kendall, C., Orem, W., Hostettler, F., and Rollog, M., 2009, A carbon, nitrogen, and sulfur elemental and isotopic study in dated sediment cores from the Louisiana Shelf: Geo-Marine Letters, v. 29, no. 6, p. 415-429, https://doi.org/10.1007/s00367-009-0151-9.","productDescription":"15 p.","startPage":"415","endPage":"429","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":244360,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216487,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s00367-009-0151-9"}],"volume":"29","issue":"6","noUsgsAuthors":false,"publicationDate":"2009-08-01","publicationStatus":"PW","scienceBaseUri":"5059e336e4b0c8380cd45eab","contributors":{"authors":[{"text":"Rosenbauer, R.J.","contributorId":37320,"corporation":false,"usgs":true,"family":"Rosenbauer","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":451895,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Swarzenski, P.W. 0000-0003-0116-0578","orcid":"https://orcid.org/0000-0003-0116-0578","contributorId":29487,"corporation":false,"usgs":true,"family":"Swarzenski","given":"P.W.","affiliations":[],"preferred":false,"id":451893,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kendall, C. 0000-0002-0247-3405","orcid":"https://orcid.org/0000-0002-0247-3405","contributorId":35050,"corporation":false,"usgs":true,"family":"Kendall","given":"C.","affiliations":[],"preferred":false,"id":451894,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Orem, W. H. 0000-0003-4990-0539","orcid":"https://orcid.org/0000-0003-4990-0539","contributorId":93084,"corporation":false,"usgs":true,"family":"Orem","given":"W. H.","affiliations":[],"preferred":false,"id":451896,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hostettler, F. D.","contributorId":99563,"corporation":false,"usgs":true,"family":"Hostettler","given":"F. D.","affiliations":[],"preferred":false,"id":451897,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Rollog, M.E.","contributorId":103112,"corporation":false,"usgs":true,"family":"Rollog","given":"M.E.","email":"","affiliations":[],"preferred":false,"id":451898,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70176163,"text":"70176163 - 2009 - Using a coupled groundwater/surfacewater model to predict climate-change impacts to lakes in the Trout Lake watershed, Northern Wisconsin","interactions":[{"subject":{"id":70176163,"text":"70176163 - 2009 - Using a coupled groundwater/surfacewater model to predict climate-change impacts to lakes in the Trout Lake watershed, Northern Wisconsin","indexId":"70176163","publicationYear":"2009","noYear":false,"title":"Using a coupled groundwater/surfacewater model to predict climate-change impacts to lakes in the Trout Lake watershed, Northern Wisconsin"},"predicate":"IS_PART_OF","object":{"id":97928,"text":"sir20095049 - 2009 - Planning for an uncertain future - Monitoring, integration, and adaptation","indexId":"sir20095049","publicationYear":"2009","noYear":false,"title":"Planning for an uncertain future - Monitoring, integration, and adaptation"},"id":1}],"isPartOf":{"id":97928,"text":"sir20095049 - 2009 - Planning for an uncertain future - Monitoring, integration, and adaptation","indexId":"sir20095049","publicationYear":"2009","noYear":false,"title":"Planning for an uncertain future - Monitoring, integration, and adaptation"},"lastModifiedDate":"2016-08-30T15:24:37","indexId":"70176163","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Using a coupled groundwater/surfacewater model to predict climate-change impacts to lakes in the Trout Lake watershed, Northern Wisconsin","docAbstract":"<p>A major focus of the U.S. Geological Survey&rsquo;s Trout Lake Water, Energy, and Biogeochemical Budgets (WEBB) project is the development of a watershed model to allow predictions of hydrologic response to future conditions including land-use and climate change. The coupled groundwater/surface-water model GSFLOW was chosen for this purpose because it could easily incorporate an existing groundwater flow model and it provides for simulation of surface-water processes. The Trout Lake watershed in northern Wisconsin is underlain by a highly conductive outwash sand aquifer. In this area, streamflow is dominated by groundwater contributions; however, surface runoff occurs during intense rainfall periods and spring snowmelt. Surface runoff also occurs locally near stream/lake areas where the unsaturated zone is thin. A diverse data set, collected from 1992 to 2007 for the Trout Lake WEBB project and the co-located and NSF-funded North Temperate Lakes LTER project, includes snowpack, solar radiation, potential evapotranspiration, lake levels, groundwater levels, and streamflow. The timeseries processing software TSPROC (Doherty 2003) was used to distill the large time series data set to a smaller set of observations and summary statistics that captured the salient hydrologic information. The timeseries processing reduced hundreds of thousands of observations to less than 5,000. Model calibration included specific predictions for several lakes in the study area using the PEST parameter estimation suite of software (Doherty 2007). The calibrated model was used to simulate the hydrologic response in the study&nbsp;lakes to a variety of climate change scenarios culled from the IPCC Fourth Assessment Report of the Intergovernmental Panel on Climate Change (Solomon et al. 2007). Results from the simulations indicate climate change could result in substantial changes to the lake levels and components of the hydrologic budget of a seepage lake in the flow system. For a drainage lake lower in the flow system, the impacts of climate change are diminished.&nbsp;</p>","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Planning for an uncertain future - Monitoring, integration, and adaptation (SIR2009-5049)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"conferenceTitle":"Third interagency conference on research in the watersheds","conferenceDate":"September 8-11, 2008","conferenceLocation":"Estes Park, CO","language":"English","publisher":"U.S Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Walker, J.F., Hunt, R.J., Markstrom, S., Hay, L.E., and Doherty, J., 2009, Using a coupled groundwater/surfacewater model to predict climate-change impacts to lakes in the Trout Lake watershed, Northern Wisconsin, <i>in</i> Planning for an uncertain future - Monitoring, integration, and adaptation (SIR2009-5049), Estes Park, CO, September 8-11, 2008, p. 155-161.","productDescription":"6 p.","startPage":"155","endPage":"161","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":328067,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":328066,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/sir/2009/5049/pdf/Walker.pdf"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"57c6b1b6e4b0f2f0cebe73c4","contributors":{"authors":[{"text":"Walker, John F. jfwalker@usgs.gov","contributorId":1081,"corporation":false,"usgs":true,"family":"Walker","given":"John","email":"jfwalker@usgs.gov","middleInitial":"F.","affiliations":[{"id":677,"text":"Wisconsin Water Science Center","active":true,"usgs":true}],"preferred":true,"id":647522,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hunt, Randall J. 0000-0001-6465-9304 rjhunt@usgs.gov","orcid":"https://orcid.org/0000-0001-6465-9304","contributorId":1129,"corporation":false,"usgs":true,"family":"Hunt","given":"Randall","email":"rjhunt@usgs.gov","middleInitial":"J.","affiliations":[{"id":677,"text":"Wisconsin Water Science Center","active":true,"usgs":true}],"preferred":true,"id":647523,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Markstrom, Steven L. 0000-0001-7630-9547 markstro@usgs.gov","orcid":"https://orcid.org/0000-0001-7630-9547","contributorId":1986,"corporation":false,"usgs":true,"family":"Markstrom","given":"Steven L.","email":"markstro@usgs.gov","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":false,"id":647524,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hay, Lauren E. 0000-0003-3763-4595 lhay@usgs.gov","orcid":"https://orcid.org/0000-0003-3763-4595","contributorId":1287,"corporation":false,"usgs":true,"family":"Hay","given":"Lauren","email":"lhay@usgs.gov","middleInitial":"E.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":647525,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Doherty, John","contributorId":43843,"corporation":false,"usgs":true,"family":"Doherty","given":"John","affiliations":[],"preferred":false,"id":647526,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70033003,"text":"70033003 - 2009 - Removal of organic wastewater contaminants in septic systems using advanced treatment technologies","interactions":[],"lastModifiedDate":"2012-03-12T17:21:37","indexId":"70033003","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2262,"text":"Journal of Environmental Quality","active":true,"publicationSubtype":{"id":10}},"title":"Removal of organic wastewater contaminants in septic systems using advanced treatment technologies","docAbstract":"The detection of pharmaceuticals and other organic wastewater contaminants (OWCs) in ground water and surface-water bodies has raised concerns about the possible ecological impacts of these compounds on nontarget organisms. On-site wastewater treatment systems represent a potentially significant route of entry for organic contaminants to the environment. In this study, effluent samples were collected and analyzed from conventional septic systems and from systems using advanced treatment technologies. Six of 13 target compounds were detected in effluent from at least one septic system. Caffeine, paraxanthine, and acetaminophen were the most frequently detected compounds, and estrogenic activity was detected in 14 of 15 systems. The OWC concentrations were significantly lower in effluent after sand filtration (p < 0.01) or aerobic treatment (p < 0.05) as compared with effluent that had not undergone advanced treatment. In general, concentrations in conventional systems were comparable to those measured in previous studies of municipal wastewater treatment plant (WWTP) influent, and concentrations in systems after advanced treatment were comparable to previously measured concentrations in WWTP effluent. These data indicate that septic systems using advanced treatment can reduce OWCs in treated effluent to similar concentrations as municipal WWTPs. Copyright ?? 2009 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Environmental Quality","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2134/jeq2007.0365","issn":"00472","usgsCitation":"Wilcox, J., Bahr, J., Hedman, C., Hemming, J., Barman, M., and Bradbury, K.R., 2009, Removal of organic wastewater contaminants in septic systems using advanced treatment technologies: Journal of Environmental Quality, v. 38, no. 1, p. 149-156, https://doi.org/10.2134/jeq2007.0365.","startPage":"149","endPage":"156","numberOfPages":"8","costCenters":[],"links":[{"id":213416,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2134/jeq2007.0365"},{"id":241040,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"38","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aa730e4b0c8380cd85292","contributors":{"authors":[{"text":"Wilcox, J.D.","contributorId":107920,"corporation":false,"usgs":true,"family":"Wilcox","given":"J.D.","email":"","affiliations":[],"preferred":false,"id":438925,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bahr, J.M.","contributorId":62346,"corporation":false,"usgs":true,"family":"Bahr","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":438923,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hedman, C.J.","contributorId":56447,"corporation":false,"usgs":true,"family":"Hedman","given":"C.J.","email":"","affiliations":[],"preferred":false,"id":438922,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hemming, J.D.C.","contributorId":37965,"corporation":false,"usgs":true,"family":"Hemming","given":"J.D.C.","email":"","affiliations":[],"preferred":false,"id":438920,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Barman, M.A.E.","contributorId":47172,"corporation":false,"usgs":true,"family":"Barman","given":"M.A.E.","email":"","affiliations":[],"preferred":false,"id":438921,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Bradbury, K. R.","contributorId":86070,"corporation":false,"usgs":true,"family":"Bradbury","given":"K.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":438924,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70035378,"text":"70035378 - 2009 - Regeneration of coastal marsh vegetation impacted by hurricanes Katrina and Rita","interactions":[],"lastModifiedDate":"2012-03-12T17:21:54","indexId":"70035378","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3750,"text":"Wetlands","onlineIssn":"1943-6246","printIssn":"0277-5212","active":true,"publicationSubtype":{"id":10}},"title":"Regeneration of coastal marsh vegetation impacted by hurricanes Katrina and Rita","docAbstract":"The dynamics of plant regeneration via seed and vegetative spread in coastal wetlands dictate the nature of community reassembly that takes place after hurricanes or sea level rise. The objectives of my project were to evaluate the potential effects of saltwater intrusion and flooding of Hurricanes Katrina and Rita on seedling regeneration in coastal wetlands of the Gulf Coast. Specifically I tested hypotheses to determine for species in fresh, brackish and salt marshes of the Gulf Coast if 1) the pattern of seed germination and seedling recruitment differed with distance from the shoreline, and 2) seed germination and seedling recruitment for various species were reduced in higher levels of water depth and salinity. Regarding Hypothesis 1, seedling densities increased with distance from the shoreline in fresh and brackish water marshes while decreasing with distance from the shoreline in salt marshes. Also to test Hypothesis 1, I used a greenhouse seed bank assay to examine seed germination from seed banks collected at distances from the shoreline in response to various water depths and salinity levels using a nested factorial design. For all marsh types, the influence of water level and salinity on seed germination shifted with distance from the shoreline (i.e., three way interaction of the main effects of distance nested within site, water depth, and salinity). Data from the seed bank assay were also used to test Hypothesis 2. The regeneration of species from fresh, brackish, and salt marshes were reduced in conditions of high salinity and/or water, so that following hurricanes or sea level rise, seedling regeneration could be reduced. Among the species of these coastal marshes, there was some flexibility of response, so that at least some species were able to germinate in either high or low salinity. Salt marshes had a few fresher marsh species in the seed bank that would not germinate without a period of fresh water input (e.g., Sagittaria lancifolia) as well as salt water species (e.g., Avicennia germinans, Salicornia bigelovii). Nevertheless, the species richness of seeds germinating from the seed bank of freshwater marshes was reduced more than in salt marshes, indicating that freshwater marsh regeneration may be more affected by hurricanes and/or sea level rise than salt marshes. From the perspective of short-term seed germination and recruitment following hurricanes, species recruitment is dependent on the post-disturbance conditions of water and salinity. ?? 2009 The Society of Wetland Scientists.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Wetlands","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1672/08-18.1","issn":"02775212","usgsCitation":"Middleton, B., 2009, Regeneration of coastal marsh vegetation impacted by hurricanes Katrina and Rita: Wetlands, v. 29, no. 1, p. 54-65, https://doi.org/10.1672/08-18.1.","startPage":"54","endPage":"65","numberOfPages":"12","costCenters":[],"links":[{"id":215404,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1672/08-18.1"},{"id":243207,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"29","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"50e4a455e4b0e8fec6cdbb33","contributors":{"authors":[{"text":"Middleton, B.A. 0000-0002-1220-2326 middletonb@usgs.gov","orcid":"https://orcid.org/0000-0002-1220-2326","contributorId":89108,"corporation":false,"usgs":true,"family":"Middleton","given":"B.A.","email":"middletonb@usgs.gov","affiliations":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"preferred":false,"id":450384,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70032654,"text":"70032654 - 2009 - Identification of methyl triclosan and halogenated analogues in male common carp (Cyprinus carpio) from Las Vegas Bay and semipermeable membrane devices from Las Vegas Wash, Nevada","interactions":[],"lastModifiedDate":"2021-05-27T17:40:03.248634","indexId":"70032654","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3352,"text":"Science of the Total Environment","active":true,"publicationSubtype":{"id":10}},"title":"Identification of methyl triclosan and halogenated analogues in male common carp (Cyprinus carpio) from Las Vegas Bay and semipermeable membrane devices from Las Vegas Wash, Nevada","docAbstract":"Methyl triclosan and four halogenated analogues have been identified in extracts of individual whole-body male carp (Cyprinus carpio) tissue that were collected from Las Vegas Bay, Nevada, and Semipermeable Membrane Devices (SPMD) that were deployed in Las Vegas Wash, Nevada. Methyl triclosan is believed to be the microbially methylated product of the antibacterial agent triclosan (2, 4, 4'-trichloro-4-hydroxydiphenyl ether, Chemical Abstract Service Registry Number 3380-34-5, Irgasan DP300). The presence of methyl triclosan and four halogenated analogues was confirmed in SPMD extracts by comparing low- and high-resolution mass spectral data and Kovats retention indices of methyl triclosan with commercially obtained triclosan that was derivatized to the methyl ether with ethereal diazomethane. The four halogenated analogues of methyl triclosan detected in both whole-body tissue and SPMD extracts were tentatively identified by high resolution mass spectrometry. Methyl triclosan was detected in all 29 male common carp from Las Vegas Bay with a mean concentration of 596????g kg- 1 wet weight (ww) which is more than an order of magnitude higher than previously reported concentrations in the literature. The halogenated analogs were detected less frequently (21%-76%) and at much lower concentrations (< 51????g kg- 1 ww). None of these compounds were detected in common carp from a Lake Mead reference site in Overton Arm, Nevada.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Science of the Total Environment","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.scitotenv.2008.11.009","issn":"00489","usgsCitation":"Leiker, T., Abney, S., Goodbred, S.L., and Rosen, M.R., 2009, Identification of methyl triclosan and halogenated analogues in male common carp (Cyprinus carpio) from Las Vegas Bay and semipermeable membrane devices from Las Vegas Wash, Nevada: Science of the Total Environment, v. 407, no. 6, p. 2102-2114, https://doi.org/10.1016/j.scitotenv.2008.11.009.","startPage":"2102","endPage":"2114","numberOfPages":"13","costCenters":[{"id":452,"text":"National Water Quality Laboratory","active":true,"usgs":true}],"links":[{"id":241455,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213796,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.scitotenv.2008.11.009"}],"volume":"407","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3832e4b0c8380cd614a1","contributors":{"authors":[{"text":"Leiker, T.J.","contributorId":96719,"corporation":false,"usgs":true,"family":"Leiker","given":"T.J.","email":"","affiliations":[],"preferred":false,"id":437295,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Abney, S.R.","contributorId":103094,"corporation":false,"usgs":true,"family":"Abney","given":"S.R.","email":"","affiliations":[],"preferred":false,"id":437296,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Goodbred, S. L.","contributorId":58232,"corporation":false,"usgs":true,"family":"Goodbred","given":"S.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":437294,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rosen, Michael R.","contributorId":43096,"corporation":false,"usgs":true,"family":"Rosen","given":"Michael","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":437293,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70032398,"text":"70032398 - 2009 - Post-breeding season distribution of black-footed and Laysan albatrosses satellite-tagged in Alaska: Inter-specific differences in spatial overlap with North Pacific fisheries","interactions":[],"lastModifiedDate":"2012-03-12T17:21:20","indexId":"70032398","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1015,"text":"Biological Conservation","active":true,"publicationSubtype":{"id":10}},"title":"Post-breeding season distribution of black-footed and Laysan albatrosses satellite-tagged in Alaska: Inter-specific differences in spatial overlap with North Pacific fisheries","docAbstract":"We integrated satellite-tracking data from black-footed albatrosses (Phoebastria nigripes; n = 7) and Laysan albatrosses captured in Alaska (Phoebastria immutabilis; n = 18) with data on fishing effort and distribution from commercial fisheries in the North Pacific in order to assess potential risk from bycatch. Albatrosses were satellite-tagged at-sea in the Central Aleutian Islands, Alaska, and tracked during the post-breeding season, July-October 2005 and 2006. In Alaskan waters, fishing effort occurred almost exclusively within continental shelf and slope waters. Potential fishery interaction for black-footed albatrosses, which most often frequented shelf-slope waters, was greatest with sablefish (Anoplopoma fimbria) longline and pot fisheries and with the Pacific halibut (Hippoglossus stenolepsis) longline fishery. In contrast, Laysan albatrosses spent as much time over oceanic waters beyond the continental shelf and slope, thereby overlapping less with fisheries in Alaska than black-footed albatrosses. Regionally, Laysan albatrosses had the greatest potential fishery interaction with the Atka mackerel (Pleurogrammus monopterygius) trawl fishery in the Western Aleutian Islands and the sablefish pot fishery in the Central Aleutian Islands. Black-footed albatrosses ranged further beyond Alaskan waters than Laysan albatrosses, overlapping west coast Canada fisheries and pelagic longline fisheries in the subarctic transition domain; Laysan albatrosses remained north of these pelagic fisheries. Due to inter-specific differences in oceanic distribution and habitat use, the overlap of fisheries with the post-breeding distribution of black-footed albatrosses is greater than that for Laysan albatrosses, highlighting inter-specific differences in potential vulnerability to bycatch and risk of population-level impacts from fisheries. ?? 2008 Elsevier Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Biological Conservation","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.biocon.2008.12.007","issn":"00063","usgsCitation":"Fischer, K., Suryan, R., Roby, D., and Balogh, G., 2009, Post-breeding season distribution of black-footed and Laysan albatrosses satellite-tagged in Alaska: Inter-specific differences in spatial overlap with North Pacific fisheries: Biological Conservation, v. 142, no. 4, p. 751-760, https://doi.org/10.1016/j.biocon.2008.12.007.","startPage":"751","endPage":"760","numberOfPages":"10","costCenters":[],"links":[{"id":241614,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213939,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.biocon.2008.12.007"}],"volume":"142","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7e59e4b0c8380cd7a4ae","contributors":{"authors":[{"text":"Fischer, K.N.","contributorId":32360,"corporation":false,"usgs":true,"family":"Fischer","given":"K.N.","email":"","affiliations":[],"preferred":false,"id":435960,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Suryan, R.M.","contributorId":52919,"corporation":false,"usgs":true,"family":"Suryan","given":"R.M.","email":"","affiliations":[],"preferred":false,"id":435961,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Roby, D.D. 0000-0001-9844-0992","orcid":"https://orcid.org/0000-0001-9844-0992","contributorId":70944,"corporation":false,"usgs":true,"family":"Roby","given":"D.D.","affiliations":[],"preferred":false,"id":435962,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Balogh, G.R.","contributorId":74349,"corporation":false,"usgs":true,"family":"Balogh","given":"G.R.","email":"","affiliations":[],"preferred":false,"id":435963,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70032423,"text":"70032423 - 2009 - An integrated approach to assess broad-scale condition of coastal wetlands - The Gulf of Mexico Coastal Wetlands pilot survey","interactions":[],"lastModifiedDate":"2012-03-12T17:21:21","indexId":"70032423","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"An integrated approach to assess broad-scale condition of coastal wetlands - The Gulf of Mexico Coastal Wetlands pilot survey","docAbstract":"The Environmental Protection Agency (EPA) and U.S. Geological Survey (USGS) initiated a two-year regional pilot survey in 2007 to develop, test, and validate tools and approaches to assess the condition of northern Gulf of Mexico (GOM) coastal wetlands. Sampling sites were selected from estuarine and palustrine wetland areas with herbaceous, forested, and shrub/scrub habitats delineated by the US Fish and Wildlife Service National Wetlands Inventory Status and Trends (NWI S&T) program and contained within northern GOM coastal watersheds. A multi-level, stepwise, iterative survey approach is being applied to multiple wetland classes at 100 probabilistically-selected coastal wetlands sites. Tier 1 provides information at the landscape scale about habitat inventory, land use, and environmental stressors associated with the watershed in which each wetland site is located. Tier 2, a rapid assessment conducted through a combination of office and field work, is based on best professional judgment and on-site evidence. Tier 3, an intensive site assessment, involves on-site collection of vegetation, water, and sediment samples to establish an integrated understanding of current wetland condition and validate methods and findings from Tiers 1 and 2. The results from this survey, along with other similar regional pilots from the Mid-Atlantic, West Coast, and Great Lakes Regions will contribute to a design and implementation approach for the National Wetlands Condition Assessment to be conducted by EPA's Office of Water in 2011. ?? Springer Science+Business Media B.V. 2008.","largerWorkTitle":"Environmental Monitoring and Assessment","language":"English","doi":"10.1007/s10661-008-0668-9","issn":"01676","usgsCitation":"Nestlerode, J., Engle, V., Bourgeois, P., Heitmuller, P., Macauley, J., and Allen, Y., 2009, An integrated approach to assess broad-scale condition of coastal wetlands - The Gulf of Mexico Coastal Wetlands pilot survey, <i>in</i> Environmental Monitoring and Assessment, v. 150, no. 1-4, p. 21-29, https://doi.org/10.1007/s10661-008-0668-9.","startPage":"21","endPage":"29","numberOfPages":"9","costCenters":[],"links":[{"id":241510,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213847,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10661-008-0668-9"}],"volume":"150","issue":"1-4","noUsgsAuthors":false,"publicationDate":"2008-11-27","publicationStatus":"PW","scienceBaseUri":"5059ea7ee4b0c8380cd488d2","contributors":{"authors":[{"text":"Nestlerode, J.A.","contributorId":67738,"corporation":false,"usgs":true,"family":"Nestlerode","given":"J.A.","affiliations":[],"preferred":false,"id":436094,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Engle, V.D.","contributorId":15562,"corporation":false,"usgs":true,"family":"Engle","given":"V.D.","email":"","affiliations":[],"preferred":false,"id":436092,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bourgeois, P.","contributorId":94498,"corporation":false,"usgs":true,"family":"Bourgeois","given":"P.","affiliations":[],"preferred":false,"id":436097,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Heitmuller, P.T.","contributorId":70142,"corporation":false,"usgs":true,"family":"Heitmuller","given":"P.T.","email":"","affiliations":[],"preferred":false,"id":436095,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Macauley, J.M.","contributorId":90491,"corporation":false,"usgs":true,"family":"Macauley","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":436096,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Allen, Y.C.","contributorId":63761,"corporation":false,"usgs":true,"family":"Allen","given":"Y.C.","email":"","affiliations":[],"preferred":false,"id":436093,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70032425,"text":"70032425 - 2009 - Groundwater's significance to changing hydrology, water chemistry, and biological communities of a floodplain ecosystem, Everglades, South Florida, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:21","indexId":"70032425","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1923,"text":"Hydrogeology Journal","active":true,"publicationSubtype":{"id":10}},"title":"Groundwater's significance to changing hydrology, water chemistry, and biological communities of a floodplain ecosystem, Everglades, South Florida, USA","docAbstract":"The Everglades (Florida, USA) is one of the world's larger subtropical peatlands with biological communities adapted to waters low in total dissolved solids and nutrients. Detecting how the pre-drainage hydrological system has been altered is crucial to preserving its functional attributes. However, reliable tools for hindcasting historic conditions in the Everglades are limited. A recent synthesis demonstrates that the proportion of surface-water inflows has increased relative to precipitation, accounting for 33% of total inputs compared with 18% historically. The largest new source of water is canal drainage from areas of former wetlands converted to agriculture. Interactions between groundwater and surface water have also increased, due to increasing vertical hydraulic gradients resulting from topographic and water-level alterations on the otherwise extremely flat landscape. Environmental solute tracer data were used to determine groundwater's changing role, from a freshwater storage reservoir that sustained the Everglades ecosystem during dry periods to a reservoir of increasingly degraded water quality. Although some of this degradation is attributable to increased discharge of deep saline groundwater, other mineral sources such as fertilizer additives and peat oxidation have made a greater contribution to water-quality changes that are altering mineral-sensitive biological communities. ?? Springer-Verlag 2008.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrogeology Journal","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10040-008-0379-x","issn":"14312","usgsCitation":"Harvey, J., and McCormick, P., 2009, Groundwater's significance to changing hydrology, water chemistry, and biological communities of a floodplain ecosystem, Everglades, South Florida, USA: Hydrogeology Journal, v. 17, no. 1, p. 185-201, https://doi.org/10.1007/s10040-008-0379-x.","startPage":"185","endPage":"201","numberOfPages":"17","costCenters":[],"links":[{"id":476265,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1007/s10040-008-0379-x","text":"Publisher Index Page"},{"id":213879,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10040-008-0379-x"},{"id":241545,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","issue":"1","noUsgsAuthors":false,"publicationDate":"2008-10-29","publicationStatus":"PW","scienceBaseUri":"505a2dc4e4b0c8380cd5c004","contributors":{"authors":[{"text":"Harvey, J. W. 0000-0002-2654-9873","orcid":"https://orcid.org/0000-0002-2654-9873","contributorId":39725,"corporation":false,"usgs":true,"family":"Harvey","given":"J. W.","affiliations":[],"preferred":false,"id":436102,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McCormick, P.V.","contributorId":93272,"corporation":false,"usgs":true,"family":"McCormick","given":"P.V.","email":"","affiliations":[],"preferred":false,"id":436103,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70047279,"text":"70047279 - 2009 - Warmwater fish in large standing waters","interactions":[],"lastModifiedDate":"2022-12-29T14:59:29.614998","indexId":"70047279","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"chapter":"3","title":"Warmwater fish in large standing waters","docAbstract":"<p>Large standing waters are defined as those larger than 200 ha. Water temperature is a major determinant of fish assemblages in large standing water of North America (Matthews 1998 ). From a thermal perspective, eaters are broadly classified into coldwater (inhabited by trout and salmon) and warmwater (intolerable to trout and salmon). Warmwater fish assemblages follow latitudinal and altitudinal gradients, although there are not sharply defined geographical divisions and some standing waters host assemblages with a mixture of warmwater and coldwater fsh species. Standing waters that support warmwater fish include reservoirs created by dams and natural lakes created by fluvial and geologic processes. Most reservoirs in North America tend to be in temperate to subtropical latitudes and are largely warmwater (Kennedy 1999).</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Standard methods for sampling North American freshwater fishes","largerWorkSubtype":{"id":15,"text":"Monograph"},"language":"English","publisher":"American Fisheries Society","publisherLocation":"Bethesda, MD","doi":"10.47886/9781934874103.ch3","usgsCitation":"Miranda, L., and Boxrucker, J., 2009, Warmwater fish in large standing waters, chap. 3 <i>of</i> Standard methods for sampling North American freshwater fishes, p. 29-42, https://doi.org/10.47886/9781934874103.ch3.","productDescription":"14 p.","startPage":"29","endPage":"42","numberOfPages":"14","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":393,"text":"Mississippi Cooperative Fish and Wildlife Research Unit","active":false,"usgs":true}],"links":[{"id":275516,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"51f78eeee4b02e26443a93df","contributors":{"editors":[{"text":"Bonar, Scott A. 0000-0003-3532-4067 sbonar@usgs.gov","orcid":"https://orcid.org/0000-0003-3532-4067","contributorId":3712,"corporation":false,"usgs":true,"family":"Bonar","given":"Scott","email":"sbonar@usgs.gov","middleInitial":"A.","affiliations":[{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true}],"preferred":true,"id":509423,"contributorType":{"id":2,"text":"Editors"},"rank":1},{"text":"Hubert, Wayne A.","contributorId":9325,"corporation":false,"usgs":true,"family":"Hubert","given":"Wayne","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":509424,"contributorType":{"id":2,"text":"Editors"},"rank":2},{"text":"Willis, David W.","contributorId":55313,"corporation":false,"usgs":true,"family":"Willis","given":"David","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":509425,"contributorType":{"id":2,"text":"Editors"},"rank":3}],"authors":[{"text":"Miranda, L.E.","contributorId":64132,"corporation":false,"usgs":true,"family":"Miranda","given":"L.E.","email":"","affiliations":[],"preferred":false,"id":481601,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Boxrucker, Jeff","contributorId":29291,"corporation":false,"usgs":true,"family":"Boxrucker","given":"Jeff","email":"","affiliations":[],"preferred":false,"id":481600,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
]}