{"pageNumber":"1939","pageRowStart":"48450","pageSize":"25","recordCount":184617,"records":[{"id":70034328,"text":"70034328 - 2010 - Comparison of aquifer characterization approaches through steady state groundwater model validation: A controlled laboratory sandbox study","interactions":[],"lastModifiedDate":"2012-03-12T17:21:46","indexId":"70034328","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Comparison of aquifer characterization approaches through steady state groundwater model validation: A controlled laboratory sandbox study","docAbstract":"Groundwater modeling has become a vital component to water supply and contaminant transport investigations. An important component of groundwater modeling under steady state conditions is selecting a representative hydraulic conductivity (K) estimate or set of estimates which defines the K field of the studied region. Currently, there are a number of characterization approaches to obtain K at various scales and in varying degrees of detail, but there is a paucity of information in terms of which characterization approach best predicts flow through aquifers or drawdowns caused by some drawdown inducing events. The main objective of this paper is to assess K estimates obtained by various approaches by predicting drawdowns from independent cross-hole pumping tests and total flow rates through a synthetic heterogeneous aquifer from flow-through tests. Specifically, we (1) characterize a synthetic heterogeneous aquifer built in the sandbox through various techniques (permeameter analyses of core samples, single-hole, cross-hole, and flow-through testing), (2) obtain mean K fields through traditional analysis of test data by treating the medium to be homogeneous, (3) obtain heterogeneous K fields through kriging and steady state hydraulic tomography, and (4) conduct forward simulations of 16 independent pumping tests and six flowthrough tests using these homogeneous and heterogeneous K fields and comparing them to actual data. Results show that the mean K and heterogeneous K fields estimated through kriging of small-scale K data (core and single-hole tests) yield biased predictions of drawdowns and flow rates in this synthetic heterogeneous aquifer. In contrast, the heterogeneous K distribution or ?K tomogram? estimated via steady state hydraulic tomography yields excellent predictions of drawdowns of pumping tests not used in the construction of the tomogram and very good estimates of total flow rates from the flowthrough tests. These results suggest that steady state groundwater model validation is possible in this laboratory sandbox aquifer if the heterogeneous K distribution and forcing functions (boundary conditions and source/sink terms) are characterized sufficiently. ?? 2010 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Water Resources Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2009WR007745","issn":"00431397","usgsCitation":"Illman, W., Zhu, J., Craig, A., and Yin, D., 2010, Comparison of aquifer characterization approaches through steady state groundwater model validation: A controlled laboratory sandbox study: Water Resources Research, v. 46, no. 4, https://doi.org/10.1029/2009WR007745.","costCenters":[],"links":[{"id":475990,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2009wr007745","text":"Publisher Index Page"},{"id":216852,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2009WR007745"},{"id":244748,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"46","issue":"4","noUsgsAuthors":false,"publicationDate":"2010-04-03","publicationStatus":"PW","scienceBaseUri":"5059f850e4b0c8380cd4cffd","contributors":{"authors":[{"text":"Illman, W.A.","contributorId":53195,"corporation":false,"usgs":true,"family":"Illman","given":"W.A.","email":"","affiliations":[],"preferred":false,"id":445258,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Zhu, J.","contributorId":6289,"corporation":false,"usgs":true,"family":"Zhu","given":"J.","email":"","affiliations":[],"preferred":false,"id":445257,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Craig, A.J.","contributorId":56477,"corporation":false,"usgs":true,"family":"Craig","given":"A.J.","email":"","affiliations":[],"preferred":false,"id":445259,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Yin, D.","contributorId":90137,"corporation":false,"usgs":true,"family":"Yin","given":"D.","email":"","affiliations":[],"preferred":false,"id":445260,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
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Images are typically 5–6</span><span>&nbsp;</span><span>km wide with 3-color coverage over the central 20% of the swath, and their scales usually range from 25 to 60</span><span>&nbsp;</span><span>cm/pixel. Nine hundred and sixty stereo pairs were acquired and more than 50&nbsp;digital terrain models&nbsp;(DTMs) completed; these data have led to some of the most significant science results. New methods to measure and correct distortions due to pointing jitter facilitate topographic and&nbsp;change-detection&nbsp;studies at sub-meter scales. Recent results address Noachian&nbsp;bedrock stratigraphy, fluvially deposited fans in craters and in or near Valles Marineris,&nbsp;groundwater flow&nbsp;in fractures and&nbsp;porous media, quasi-periodic layering in polar and non-polar deposits, tectonic history of west Candor Chasma, geometry of clay-rich deposits near and within Mawrth Vallis, dynamics of flood lavas in the Cerberus Palus region, evidence for&nbsp;pyroclastic deposits, columnar jointing in&nbsp;lava flows, recent collapse pits, evidence for water in well-preserved impact craters, newly discovered large rayed craters, and glacial and&nbsp;periglacial processes. Of particular interest are ongoing processes such as those driven by the wind, impact cratering, avalanches of dust and/or frost, relatively bright deposits on steep gullied slopes, and the dynamic seasonal processes over&nbsp;polar regions. HiRISE has acquired hundreds of large images of past, present and potential future&nbsp;landing sites&nbsp;and has contributed to scientific and engineering studies of those sites. Warming the focal-plane electronics prior to imaging has mitigated an instrument anomaly that produces bad data under cold operating conditions.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.icarus.2009.04.023","issn":"00191035","usgsCitation":"McEwen, A.S., Banks, M.E., Baugh, N., Becker, K.J., Boyd, A., Bergstrom, J.W., Beyer, R.A., Bortolini, E., Bridges, N.T., Byrne, S., Castalia, B., Chuang, F.C., Crumpler, L.S., Daubar, I., Davatzes, A.K., Deardorff, D.G., DeJong, A., Delamere, W.A., Dobrea, E.Z., Dundas, C.M., Eliason, E.M., Espinoza, Y., Fennema, A., Fishbaugh, K.E., Forrester, T., Geissler, P.E., Grant, J.A., Griffes, J.L., Grotzinger, J., Gulick, V.C., Hansen, C.J., Herkenhoff, K.E., Heyd, R., Jaeger, W.L., Jones, D., Kanefsky, B., Keszthelyi, L., King, R., Kirk, R.L., Kolb, K.J., Lasco, J., Lefort, A., Leis, R., Lewis, K.W., Martinez-Alonso, S., Mattson, S., McArthur, G.K., Mellon, M.T., Metz, J., Milazzo, M.P., Milliken, R.E., Motazedian, T., 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,{"id":70034216,"text":"70034216 - 2010 - Summer spatial patterning of chukars in relation to free water in Western Utah","interactions":[],"lastModifiedDate":"2012-03-12T17:21:46","indexId":"70034216","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2602,"text":"Landscape Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Summer spatial patterning of chukars in relation to free water in Western Utah","docAbstract":"Free water is considered important to wildlife in arid regions. In the western United States, thousands of water developments have been built to benefit wildlife in arid landscapes. Agencies and researchers have yet to clearly demonstrate their effectiveness. We combined a spatial analysis of summer chukar (Alectoris chukar) covey locations with dietary composition analysis in western Utah. Our specific objectives were to determine if chukars showed a spatial pattern that suggested association with free water in four study areas and to document summer dietary moisture content in relation to average distance from water. The observed data for the Cedar Mountains study area fell within the middle of the random mean distance to water distribution suggesting no association with free water. The observed mean distance to water for the other three areas was much closer than expected compared to a random spatial process, suggesting the importance of free water to these populations. Dietary moisture content of chukar food items from the Cedar Mountains (59%) was significantly greater (P < 0.05) than that of birds from Box Elder (44%) and Keg-Dugway (44%). Water developments on the Cedar Mountains are likely ineffective for chukars. Spatial patterns on the other areas, however, suggest association with free water and our results demonstrate the need for site-specific considerations. Researchers should be aware of the potential to satisfy water demand with pre-formed and metabolic water for a variety of species in studies that address the effects of wildlife water developments. We encourage incorporation of spatial structure in model error components in future ecological research. ?? Springer Science+Business Media B.V. 2009.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Landscape Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10980-009-9407-z","issn":"09212973","usgsCitation":"Larsen, R., Bissonette, J., Flinders, J., Hooten, M., and Wilson, T., 2010, Summer spatial patterning of chukars in relation to free water in Western Utah: Landscape Ecology, v. 25, no. 1, p. 135-145, https://doi.org/10.1007/s10980-009-9407-z.","startPage":"135","endPage":"145","numberOfPages":"11","costCenters":[],"links":[{"id":216636,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10980-009-9407-z"},{"id":244518,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"25","issue":"1","noUsgsAuthors":false,"publicationDate":"2009-09-17","publicationStatus":"PW","scienceBaseUri":"505b9f43e4b08c986b31e458","contributors":{"authors":[{"text":"Larsen, R.T.","contributorId":6693,"corporation":false,"usgs":true,"family":"Larsen","given":"R.T.","email":"","affiliations":[],"preferred":false,"id":444658,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bissonette, J.A.","contributorId":21498,"corporation":false,"usgs":true,"family":"Bissonette","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":444659,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Flinders, J.T.","contributorId":43703,"corporation":false,"usgs":true,"family":"Flinders","given":"J.T.","email":"","affiliations":[],"preferred":false,"id":444660,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hooten, M.B.","contributorId":50261,"corporation":false,"usgs":true,"family":"Hooten","given":"M.B.","email":"","affiliations":[],"preferred":false,"id":444661,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Wilson, T.L.","contributorId":78561,"corporation":false,"usgs":true,"family":"Wilson","given":"T.L.","email":"","affiliations":[],"preferred":false,"id":444662,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70034211,"text":"70034211 - 2010 - A multiscale and multidisciplinary investigation of ecosystem-atmosphere CO<sub>2</sub> exchange over the rocky mountains of colorado","interactions":[],"lastModifiedDate":"2012-03-12T17:21:46","indexId":"70034211","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1112,"text":"Bulletin of the American Meteorological Society","onlineIssn":"1520-0477","printIssn":"0003-0007","active":true,"publicationSubtype":{"id":10}},"title":"A multiscale and multidisciplinary investigation of ecosystem-atmosphere CO<sub>2</sub> exchange over the rocky mountains of colorado","docAbstract":"A field study combined with modeling investigation demonstrated that the organization of CO2 transport by mountain terrain strongly affects the regional CO2 budget. Atmospheric dynamics can lead to complicated flows generated by inhomogeneous landscapes, topography or synoptic weather systems. The field campaign conducted of a ground deployment, the Carbon in the Mountain Experiment (CME04), and an aircraft deployment of the national Center for Atmospheric Research (NCAR) C-130, the Airborne Carbon in the Mountains Experiment (ACME04) over the period of spring to fall of 2004 to cover the seasonal variation of ecosystem-atmosphere carbon exchange. The role of the mountain circulation in CO2 transport can be played over seemingly flat terrain by mesoscale flows generated by various physical processes. The three dimensional observation strategy considered can also be applied over flat terrain.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin of the American Meteorological Society","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1175/2009BAMS2733.1","issn":"00030007","usgsCitation":"Sun, J., Oncley, S., Burns, S.P., Stephens, B., Lenschow, D., Campos, T., Monson, R.K., Schimel, D.S., Sacks, W., De Wekker, S.F., Lai, C., Lamb, B., Ojima, D., Ellsworth, P., Sternberg, L., Zhong, S., Clements, C., Moore, D., Anderson, D., Watt, A., Hu, J., Tschudi, M., Aulenbach, S., Allwine, E., and Coons, T., 2010, A multiscale and multidisciplinary investigation of ecosystem-atmosphere CO<sub>2</sub> exchange over the rocky mountains of colorado: Bulletin of the American Meteorological Society, v. 91, no. 2, p. 209-230, https://doi.org/10.1175/2009BAMS2733.1.","startPage":"209","endPage":"230","numberOfPages":"22","costCenters":[],"links":[{"id":475801,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1175/2009bams2733.1","text":"Publisher Index Page"},{"id":244429,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216552,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1175/2009BAMS2733.1"}],"volume":"91","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e48fe4b0c8380cd46718","contributors":{"authors":[{"text":"Sun, Jielun","contributorId":33443,"corporation":false,"usgs":true,"family":"Sun","given":"Jielun","email":"","affiliations":[],"preferred":false,"id":444628,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Oncley, S.P.","contributorId":13416,"corporation":false,"usgs":true,"family":"Oncley","given":"S.P.","email":"","affiliations":[],"preferred":false,"id":444622,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Burns, Sean P.","contributorId":98921,"corporation":false,"usgs":true,"family":"Burns","given":"Sean","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":444643,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Stephens, B.B.","contributorId":100883,"corporation":false,"usgs":true,"family":"Stephens","given":"B.B.","email":"","affiliations":[],"preferred":false,"id":444644,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Lenschow, D.H.","contributorId":63614,"corporation":false,"usgs":true,"family":"Lenschow","given":"D.H.","email":"","affiliations":[],"preferred":false,"id":444635,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Campos, T.","contributorId":55665,"corporation":false,"usgs":true,"family":"Campos","given":"T.","email":"","affiliations":[],"preferred":false,"id":444634,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Monson, Russell K.","contributorId":48136,"corporation":false,"usgs":true,"family":"Monson","given":"Russell","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":444632,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Schimel, D. 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,{"id":70174158,"text":"70174158 - 2010 -  Modern technologies for an ancient fish: tools to inform management of migratory sturgeon stocks. A report for the Pacific Ocean Shelf Tracking (POST) Project","interactions":[],"lastModifiedDate":"2016-09-08T10:45:58","indexId":"70174158","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":9,"text":"Other Report"},"title":" Modern technologies for an ancient fish: tools to inform management of migratory sturgeon stocks. A report for the Pacific Ocean Shelf Tracking (POST) Project","docAbstract":"<p>No abstract available.</p>","language":"English","usgsCitation":"Nelson, T.C., Doukakis, P., Lindley, S., Drauch Schreier, A., Hightower, J.E., Hildebrand, L.R., Whitlock, R.E., and Webb, M.A., 2010,  Modern technologies for an ancient fish: tools to inform management of migratory sturgeon stocks. A report for the Pacific Ocean Shelf Tracking (POST) Project, 55 p.","productDescription":"55 p.","ipdsId":"IP-023141","costCenters":[{"id":198,"text":"Coop Res Unit Atlanta","active":true,"usgs":true}],"links":[{"id":328357,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":328356,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://swfsc.noaa.gov/publications/FED/01076.pdf"}],"publishingServiceCenter":{"id":8,"text":"Raleigh PSC"},"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"57d28baae4b0571647d0f91c","contributors":{"authors":[{"text":"Nelson, Troy C.","contributorId":174469,"corporation":false,"usgs":false,"family":"Nelson","given":"Troy","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":648322,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Doukakis, Phaedra","contributorId":174470,"corporation":false,"usgs":false,"family":"Doukakis","given":"Phaedra","email":"","affiliations":[],"preferred":false,"id":648323,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lindley, Steven T","contributorId":156322,"corporation":false,"usgs":false,"family":"Lindley","given":"Steven T","affiliations":[{"id":20315,"text":"NOAA/NMFS, Southwest Fisheries Science Center","active":true,"usgs":false}],"preferred":false,"id":648324,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Drauch Schreier, Andrea","contributorId":174471,"corporation":false,"usgs":false,"family":"Drauch Schreier","given":"Andrea","email":"","affiliations":[],"preferred":false,"id":648325,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hightower, Joseph E. jhightower@usgs.gov","contributorId":835,"corporation":false,"usgs":true,"family":"Hightower","given":"Joseph","email":"jhightower@usgs.gov","middleInitial":"E.","affiliations":[{"id":198,"text":"Coop Res Unit Atlanta","active":true,"usgs":true}],"preferred":true,"id":641005,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Hildebrand, Larry R.","contributorId":174472,"corporation":false,"usgs":false,"family":"Hildebrand","given":"Larry","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":648326,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Whitlock, Rebecca E.","contributorId":174473,"corporation":false,"usgs":false,"family":"Whitlock","given":"Rebecca","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":648327,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Webb, Molly A. H.","contributorId":152118,"corporation":false,"usgs":false,"family":"Webb","given":"Molly","email":"","middleInitial":"A. H.","affiliations":[{"id":18870,"text":"Bozeman Fish Technology Center, U.S. Fish and Wildlife Service, Bozeman, Montana 59715","active":true,"usgs":false}],"preferred":false,"id":648328,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70034122,"text":"70034122 - 2010 - Estimating black bear density using DNA data from hair snares","interactions":[],"lastModifiedDate":"2012-03-12T17:21:45","indexId":"70034122","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Estimating black bear density using DNA data from hair snares","docAbstract":"DNA-based mark-recapture has become a methodological cornerstone of research focused on bear species. The objective of such studies is often to estimate population size; however, doing so is frequently complicated by movement of individual bears. Movement affects the probability of detection and the assumption of closure of the population required in most models. To mitigate the bias caused by movement of individuals, population size and density estimates are often adjusted using ad hoc methods, including buffering the minimum polygon of the trapping array. We used a hierarchical, spatial capturerecapture model that contains explicit components for the spatial-point process that governs the distribution of individuals and their exposure to (via movement), and detection by, traps. We modeled detection probability as a function of each individual's distance to the trap and an indicator variable for previous capture to account for possible behavioral responses. We applied our model to a 2006 hair-snare study of a black bear (Ursus americanus) population in northern New York, USA. Based on the microsatellite marker analysis of collected hair samples, 47 individuals were identified. We estimated mean density at 0.20 bears/km<sup>2</sup>. A positive estimate of the indicator variable suggests that bears are attracted to baited sites; therefore, including a trap-dependence covariate is important when using bait to attract individuals. Bayesian analysis of the model was implemented in WinBUGS, and we provide the model specification. The model can be applied to any spatially organized trapping array (hair snares, camera traps, mist nests, etc.) to estimate density and can also account for heterogeneity and covariate information at the trap or individual level. ?? The Wildlife Society.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Wildlife Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2193/2009-101","issn":"0022541X","usgsCitation":"Gardner, B., Royle, J., Wegan, M., Rainbolt, R., and Curtis, P.D., 2010, Estimating black bear density using DNA data from hair snares: Journal of Wildlife Management, v. 74, no. 2, p. 318-325, https://doi.org/10.2193/2009-101.","startPage":"318","endPage":"325","numberOfPages":"8","costCenters":[],"links":[{"id":216755,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2193/2009-101"},{"id":244641,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"74","issue":"2","noUsgsAuthors":false,"publicationDate":"2010-12-13","publicationStatus":"PW","scienceBaseUri":"505a0b0fe4b0c8380cd52548","contributors":{"authors":[{"text":"Gardner, B.","contributorId":26793,"corporation":false,"usgs":true,"family":"Gardner","given":"B.","email":"","affiliations":[],"preferred":false,"id":444201,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Royle, J. Andrew 0000-0003-3135-2167","orcid":"https://orcid.org/0000-0003-3135-2167","contributorId":96221,"corporation":false,"usgs":true,"family":"Royle","given":"J. Andrew","affiliations":[],"preferred":false,"id":444203,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wegan, M.T.","contributorId":22883,"corporation":false,"usgs":true,"family":"Wegan","given":"M.T.","email":"","affiliations":[],"preferred":false,"id":444200,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rainbolt, R.E.","contributorId":19005,"corporation":false,"usgs":true,"family":"Rainbolt","given":"R.E.","email":"","affiliations":[],"preferred":false,"id":444199,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Curtis, Paul D.","contributorId":83633,"corporation":false,"usgs":true,"family":"Curtis","given":"Paul","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":444202,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70034119,"text":"70034119 - 2010 - Vulnerability of deep groundwater in the Bengal Aquifer System to contamination by arsenic","interactions":[],"lastModifiedDate":"2012-03-12T17:21:45","indexId":"70034119","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2845,"text":"Nature Geoscience","active":true,"publicationSubtype":{"id":10}},"title":"Vulnerability of deep groundwater in the Bengal Aquifer System to contamination by arsenic","docAbstract":"Shallow groundwater, the primary water source in the Bengal Basin, contains up to 100 times the World Health Organization (WHO) drinking-water guideline of 10g l 1 arsenic (As), threatening the health of 70 million people. Groundwater from a depth greater than 150m, which almost uniformly meets the WHO guideline, has become the preferred alternative source. The vulnerability of deep wells to contamination by As is governed by the geometry of induced groundwater flow paths and the geochemical conditions encountered between the shallow and deep regions of the aquifer. Stratification of flow separates deep groundwater from shallow sources of As in some areas. Oxidized sediments also protect deep groundwater through the ability of ferric oxyhydroxides to adsorb As. Basin-scale groundwater flow modelling suggests that, over large regions, deep hand-pumped wells for domestic supply may be secure against As invasion for hundreds of years. By contrast, widespread deep irrigation pumping might effectively eliminate deep groundwater as an As-free resource within decades. Finer-scale models, incorporating spatial heterogeneity, are needed to investigate the security of deep municipal abstraction at specific urban locations. ?? 2010 Macmillan Publishers Limited. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Nature Geoscience","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1038/ngeo750","issn":"17520894","usgsCitation":"Burgess, W., Hoque, M., Michael, H., Voss, C., Breit, G.N., and Ahmed, K., 2010, Vulnerability of deep groundwater in the Bengal Aquifer System to contamination by arsenic: Nature Geoscience, v. 3, no. 2, p. 83-87, https://doi.org/10.1038/ngeo750.","startPage":"83","endPage":"87","numberOfPages":"5","costCenters":[],"links":[{"id":216691,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1038/ngeo750"},{"id":244576,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"3","issue":"2","noUsgsAuthors":false,"publicationDate":"2010-01-17","publicationStatus":"PW","scienceBaseUri":"505bc37ae4b08c986b32b1d4","contributors":{"authors":[{"text":"Burgess, W.G.","contributorId":24195,"corporation":false,"usgs":true,"family":"Burgess","given":"W.G.","email":"","affiliations":[],"preferred":false,"id":444186,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hoque, M.A.","contributorId":67329,"corporation":false,"usgs":true,"family":"Hoque","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":444188,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Michael, H.A.","contributorId":98858,"corporation":false,"usgs":true,"family":"Michael","given":"H.A.","email":"","affiliations":[],"preferred":false,"id":444191,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Voss, C.I.","contributorId":79515,"corporation":false,"usgs":true,"family":"Voss","given":"C.I.","email":"","affiliations":[],"preferred":false,"id":444189,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Breit, G. N.","contributorId":94664,"corporation":false,"usgs":true,"family":"Breit","given":"G.","email":"","middleInitial":"N.","affiliations":[],"preferred":false,"id":444190,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Ahmed, K.M.","contributorId":48415,"corporation":false,"usgs":true,"family":"Ahmed","given":"K.M.","email":"","affiliations":[],"preferred":false,"id":444187,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70034116,"text":"70034116 - 2010 - Ecosystem effects of environmental flows: Modelling and experimental floods in a dryland river","interactions":[],"lastModifiedDate":"2012-03-12T17:21:45","indexId":"70034116","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1696,"text":"Freshwater Biology","active":true,"publicationSubtype":{"id":10}},"title":"Ecosystem effects of environmental flows: Modelling and experimental floods in a dryland river","docAbstract":"Successful environmental flow prescriptions require an accurate understanding of the linkages among flow events, geomorphic processes and biotic responses. We describe models and results from experimental flow releases associated with an environmental flow program on the Bill Williams River (BWR), Arizona, in arid to semiarid western U.S.A. Two general approaches for improving knowledge and predictions of ecological responses to environmental flows are: (1) coupling physical system models to ecological responses and (2) clarifying empirical relationships between flow and ecological responses through implementation and monitoring of experimental flow releases. We modelled the BWR physical system using: (1) a reservoir operations model to simulate reservoir releases and reservoir water levels and estimate flow through the river system under a range of scenarios, (2) one- and two-dimensional river hydraulics models to estimate stage-discharge relationships at the whole-river and local scales, respectively, and (3) a groundwater model to estimate surface- and groundwater interactions in a large, alluvial valley on the BWR where surface flow is frequently absent. An example of a coupled, hydrology-ecology model is the Ecosystems Function Model, which we used to link a one-dimensional hydraulic model with riparian tree seedling establishment requirements to produce spatially explicit predictions of seedling recruitment locations in a Geographic Information System. We also quantified the effects of small experimental floods on the differential mortality of native and exotic riparian trees, on beaver dam integrity and distribution, and on the dynamics of differentially flow-adapted benthic macroinvertebrate groups. Results of model applications and experimental flow releases are contributing to adaptive flow management on the BWR and to the development of regional environmental flow standards. General themes that emerged from our work include the importance of response thresholds, which are commonly driven by geomorphic thresholds or mediated by geomorphic processes, and the importance of spatial and temporal variation in the effects of flows on ecosystems, which can result from factors such as longitudinal complexity and ecohydrological feedbacks. ?? Published 2009.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Freshwater Biology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1365-2427.2009.02271.x","issn":"00465070","usgsCitation":"Shafroth, P., Wilcox, A., Lytle, D., Hickey, J., Andersen, D., Beauchamp, V., Hautzinger, A., McMullen, L., and Warner, A., 2010, Ecosystem effects of environmental flows: Modelling and experimental floods in a dryland river: Freshwater Biology, v. 55, no. 1, p. 68-85, https://doi.org/10.1111/j.1365-2427.2009.02271.x.","startPage":"68","endPage":"85","numberOfPages":"18","costCenters":[],"links":[{"id":216660,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1365-2427.2009.02271.x"},{"id":244544,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"55","issue":"1","noUsgsAuthors":false,"publicationDate":"2009-12-15","publicationStatus":"PW","scienceBaseUri":"505a059ce4b0c8380cd50e8b","contributors":{"authors":[{"text":"Shafroth, P.B.","contributorId":65041,"corporation":false,"usgs":true,"family":"Shafroth","given":"P.B.","email":"","affiliations":[],"preferred":false,"id":444176,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wilcox, A.C.","contributorId":89720,"corporation":false,"usgs":true,"family":"Wilcox","given":"A.C.","email":"","affiliations":[],"preferred":false,"id":444181,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lytle, D.A.","contributorId":85422,"corporation":false,"usgs":true,"family":"Lytle","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":444179,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hickey, J.T.","contributorId":57296,"corporation":false,"usgs":true,"family":"Hickey","given":"J.T.","email":"","affiliations":[],"preferred":false,"id":444175,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Andersen, D.C.","contributorId":19119,"corporation":false,"usgs":true,"family":"Andersen","given":"D.C.","email":"","affiliations":[],"preferred":false,"id":444173,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Beauchamp, Vanessa B.","contributorId":76544,"corporation":false,"usgs":true,"family":"Beauchamp","given":"Vanessa B.","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":false,"id":444178,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Hautzinger, A.","contributorId":88973,"corporation":false,"usgs":true,"family":"Hautzinger","given":"A.","affiliations":[],"preferred":false,"id":444180,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"McMullen, L.E.","contributorId":51576,"corporation":false,"usgs":true,"family":"McMullen","given":"L.E.","email":"","affiliations":[],"preferred":false,"id":444174,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Warner, A.","contributorId":68137,"corporation":false,"usgs":true,"family":"Warner","given":"A.","email":"","affiliations":[],"preferred":false,"id":444177,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}}
,{"id":70034101,"text":"70034101 - 2010 - Do competitors modulate rare plant response to precipitation change?","interactions":[],"lastModifiedDate":"2012-03-12T17:21:44","indexId":"70034101","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1465,"text":"Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Do competitors modulate rare plant response to precipitation change?","docAbstract":"Ecologists increasingly suspect that climate change will directly impact species physiology, demography, and phenology, but also indirectly affect these measures via changes to the surrounding community. Unfortunately, few studies examine both the direct and indirect pathways of impact. Doing so is important because altered competitive pressures can reduce or magnify the direct responses of a focal species to climate change. Here, we examine the effects of changing rainfall on three rare annual plant species in the presence and absence of competition on the California Channel Islands. We used rain-out shelters and hand watering to exclude and augment early, late, and season-long rainfall, spanning the wide range of precipitation change forecast for the region. In the absence of competition, droughts reduced the population growth rates of two of three focal annuals, while increased rainfall was only sometimes beneficial, As compared to the focal species, the dominant competitors were more sensitive to the precipitation treatments, benefiting from increased season-long precipitation and harmed by droughts. Importantly, the response of two of three competitors to the precipitation treatments tended to be positively correlated with those of the focal annuals. Although this leads to the expectation that increased competition will counter the direct benefits of favorable conditions, such indirect effects of precipitation change proved weak to nonexistent in our experiment. Competitors had little influence on the precipitation response of two focal species, due to their low sensitivity to competition and highly variable precipitation responses. Competition did affect how our third focal species responded to precipitation change, but this effect only approached significance, and whether it truly resulted from competitor response to precipitation change was unclear. Our work suggests that even when competitors respond to climate change, these responses may have little effect on the focal species. Ultimately, the strength of the indirect effect depends on how strongly climate change alters competition, and how sensitive focal species are to changes in competition. ?? 2010 by the Ecological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1890/08-2039.1","issn":"00129658","usgsCitation":"Levine, J., Kathryn, M.A., and Cowan, C., 2010, Do competitors modulate rare plant response to precipitation change?: Ecology, v. 91, no. 1, p. 130-140, https://doi.org/10.1890/08-2039.1.","startPage":"130","endPage":"140","numberOfPages":"11","costCenters":[],"links":[{"id":216870,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1890/08-2039.1"},{"id":244768,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"91","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a035fe4b0c8380cd5045b","contributors":{"authors":[{"text":"Levine, J.M.","contributorId":77748,"corporation":false,"usgs":true,"family":"Levine","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":444096,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kathryn, Mceachern A.","contributorId":31233,"corporation":false,"usgs":true,"family":"Kathryn","given":"Mceachern","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":444094,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Cowan, C.","contributorId":46777,"corporation":false,"usgs":true,"family":"Cowan","given":"C.","email":"","affiliations":[],"preferred":false,"id":444095,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70034095,"text":"70034095 - 2010 - Federal land management, carbon sequestration, and climate change in the Southeastern U.S.: a case study with fort benning","interactions":[],"lastModifiedDate":"2013-04-25T09:51:36","indexId":"70034095","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","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":"Federal land management, carbon sequestration, and climate change in the Southeastern U.S.: a case study with fort benning","docAbstract":"Land use activities can have a major impact on the temporal trendsandspatialpatternsofregionalland-atmosphereexchange of carbon. Federal lands generally have substantially different land management strategies from surrounding areas, and the carbon consequences have rarely been quantified and assessed. Using the Fort Benning Installation as a case study, we used the General Ensemble biogeochemical Modeling System (GEMS) to simulate and compare ecosystem carbon sequestration between the U.S. Army's Fort Benning and surrounding areas from 1992 to 2050. Our results indicate that the military installation sequestered more carbon than surrounding areas from 1992 to 2007 (76.7 vs 18.5 g C m<sup>-2</sup> yr<sup>-1</sup>), and is projected to continue sequestering more carbon from 2008 to 2050 (75.7 vs 25.6 g C m<sup>-2</sup> yr<sup>-1</sup>), mostly because of the proactive management approaches adopted on military training lands. Our results suggest that federal lands might play a positive and important role in sequestering and conserving atmospheric carbon because some anthropogenic disturbances (e.g., urbanization, forest harvesting, and agriculture) can be minimized or prevented on federal lands","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Science and Technology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"ACS Publications","doi":"10.1021/es9009019","issn":"0013936X","usgsCitation":"Zhao, S., Liu, S., Li, Z., and Sohl, T.L., 2010, Federal land management, carbon sequestration, and climate change in the Southeastern U.S.: a case study with fort benning: Environmental Science & Technology, v. 44, no. 3, p. 992-997, https://doi.org/10.1021/es9009019.","productDescription":"6 p.","startPage":"992","endPage":"997","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":244672,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216781,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1021/es9009019"}],"country":"United States","state":"Georgia","county":"Chattahoochee County","otherGeospatial":"Fort Benning","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -85.008096,32.220951 ], [ -85.008096,32.534956 ], [ -84.637323,32.534956 ], [ -84.637323,32.220951 ], [ -85.008096,32.220951 ] ] ] } } ] }","volume":"44","issue":"3","noUsgsAuthors":false,"publicationDate":"2010-01-07","publicationStatus":"PW","scienceBaseUri":"505a0f5ce4b0c8380cd53898","contributors":{"authors":[{"text":"Zhao, S.","contributorId":71779,"corporation":false,"usgs":true,"family":"Zhao","given":"S.","email":"","affiliations":[],"preferred":false,"id":444053,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Liu, S.","contributorId":93170,"corporation":false,"usgs":true,"family":"Liu","given":"S.","affiliations":[],"preferred":false,"id":444055,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Li, Z.","contributorId":29160,"corporation":false,"usgs":true,"family":"Li","given":"Z.","affiliations":[],"preferred":false,"id":444052,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Sohl, Terry L. 0000-0002-9771-4231","orcid":"https://orcid.org/0000-0002-9771-4231","contributorId":76419,"corporation":false,"usgs":true,"family":"Sohl","given":"Terry","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":444054,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70034042,"text":"70034042 - 2010 - Calculation of weighted averages approach for the estimation of ping tolerance values","interactions":[],"lastModifiedDate":"2012-03-12T17:21:47","indexId":"70034042","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1229,"text":"Chiang Mai Journal of Science","active":true,"publicationSubtype":{"id":10}},"title":"Calculation of weighted averages approach for the estimation of ping tolerance values","docAbstract":"A biotic index was created and proposed as a tool to assess water quality in the Upper Mae Ping sub-watersheds. The Ping biotic index was calculated by utilizing Ping tolerance values. This paper presents the calculation of Ping tolerance values of the collected macroinvertebrates. Ping tolerance values were estimated by a weighted averages approach based on the abundance of macroinvertebrates and six chemical constituents that include conductivity, dissolved oxygen, biochemical oxygen demand, ammonia nitrogen, nitrate nitrogen and orthophosphate. Ping tolerance values range from 0 to 10. Macroinvertebrates assigned a 0 are very sensitive to organic pollution while macroinvertebrates assigned 10 are highly tolerant to pollution.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Chiang Mai Journal of Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"01252526","usgsCitation":"Silalom, S., Carter, J., and Chantaramongkol, P., 2010, Calculation of weighted averages approach for the estimation of ping tolerance values: Chiang Mai Journal of Science, v. 37, no. 1, p. 151-159.","startPage":"151","endPage":"159","numberOfPages":"9","costCenters":[],"links":[{"id":244862,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"37","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f306e4b0c8380cd4b568","contributors":{"authors":[{"text":"Silalom, S.","contributorId":31235,"corporation":false,"usgs":true,"family":"Silalom","given":"S.","email":"","affiliations":[],"preferred":false,"id":443781,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Carter, J.L.","contributorId":26030,"corporation":false,"usgs":true,"family":"Carter","given":"J.L.","email":"","affiliations":[],"preferred":false,"id":443780,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Chantaramongkol, P.","contributorId":78176,"corporation":false,"usgs":true,"family":"Chantaramongkol","given":"P.","email":"","affiliations":[],"preferred":false,"id":443782,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70034037,"text":"70034037 - 2010 - Erosion and vegetation restoration impacts on ecosystem carbon dynamics in South China","interactions":[],"lastModifiedDate":"2023-08-25T12:24:17.597025","indexId":"70034037","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3420,"text":"Soil Science Society of America Journal","active":true,"publicationSubtype":{"id":10}},"title":"Erosion and vegetation restoration impacts on ecosystem carbon dynamics in South China","docAbstract":"<div class=\"\"><div class=\"article-section__content en main\"><p>To quantify the consequences of erosion and vegetation restoration on ecosystem C dynamics (a key element in understanding the terrestrial C cycle), field measurements were collected since 1959 at two experimental sites set up on highly disturbed barren land in South China. One site had received vegetation restoration (the restored site) while the other received no planting and remained barren (the barren site). The Erosion-Deposition Carbon Model (EDCM) was used to simulate the ecosystem C dynamics at both sites. The on-site observations in 2007 showed that soil organic C (SOC) storage in the top 80-cm soil layer at the barren site was 50.3 ± 3.5 Mg C ha<sup>−1</sup>, half that of the restored site. The SOC and surface soil loss by erosion at the restored site from 1959 to 2007 was 3.7 Mg C ha<sup>−1</sup><span>&nbsp;</span>and 2.2 cm, respectively—one-third and one-eighth that of the barren site. The on-site C sequestration in SOC and vegetation at the restored site was 0.67 and 2.5 Mg C ha<sup>−1</sup><span>&nbsp;</span>yr<sup>−1</sup>, respectively, from 1959 to 2007, driven largely by tree growth and high atmospheric N deposition in the study area. Simulated findings suggested that higher N deposition resulted in higher on-site SOC storage in the soil profile (with SOC in the top 20-cm layer increasing more significantly), and higher on-site ecosystem C sequestration as long as N saturation was not reached. Lacking human-induced vegetation recovery, the barren site remained as barren land from 1959 to 2007 and the on-site C decrease was 0.28 Mg C ha<sup>−1</sup><span>&nbsp;</span>yr<sup>−1</sup><span>&nbsp;</span>Our study clearly indicated that vegetation restoration and burial by soil erosion provide a large potential C sink in terrestrial ecosystems.</p></div></div>","language":"English","publisher":"ACSESS","doi":"10.2136/sssaj2009.0007","issn":"03615995","usgsCitation":"Tang, X., Liu, S., and Zhou, G., 2010, Erosion and vegetation restoration impacts on ecosystem carbon dynamics in South China: Soil Science Society of America Journal, v. 74, no. 1, p. 272-281, https://doi.org/10.2136/sssaj2009.0007.","productDescription":"10 p.","startPage":"272","endPage":"281","numberOfPages":"10","ipdsId":"IP-010176","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":475849,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.2136/sssaj2009.0007","text":"Publisher Index Page"},{"id":244798,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"74","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0a38e4b0c8380cd5225a","contributors":{"authors":[{"text":"Tang, X.","contributorId":43082,"corporation":false,"usgs":true,"family":"Tang","given":"X.","email":"","affiliations":[],"preferred":false,"id":443765,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Liu, Shuguang 0000-0002-6027-3479 sliu@usgs.gov","orcid":"https://orcid.org/0000-0002-6027-3479","contributorId":147403,"corporation":false,"usgs":true,"family":"Liu","given":"Shuguang","email":"sliu@usgs.gov","affiliations":[{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true}],"preferred":true,"id":443766,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zhou, G.","contributorId":12604,"corporation":false,"usgs":true,"family":"Zhou","given":"G.","email":"","affiliations":[],"preferred":false,"id":443764,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70033984,"text":"70033984 - 2010 - Vegetation response to early holocene warming as an analog for current and future changes: Special section","interactions":[],"lastModifiedDate":"2012-03-12T17:21:44","indexId":"70033984","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1321,"text":"Conservation Biology","active":true,"publicationSubtype":{"id":10}},"title":"Vegetation response to early holocene warming as an analog for current and future changes: Special section","docAbstract":"Temperatures in southwestern North America are projected to increase 3.5-4 ??C over the next 60-90 years. This will precipitate ecological shifts as the ranges of species change in response to new climates. During this shift, rapid-colonizing species should increase, whereas slow-colonizing species will at first decrease, but eventually become reestablished in their new range. This successional process has been estimated to require from 100 to over 300 years in small areas, under a stable climate, with a nearby seed source. How much longer will it require on a continental scale, under a changing climate, without a nearby seed source? I considered this question through an examination of the response of fossil plant assemblages from the Grand Canyon, Arizona, to the most recent rapid warming of similar magnitude that occurred at the start of the Holocene, 11,700 years ago. At that time, temperatures in southwestern North America increased about 4 ??C over less than a century. Grand Canyon plant species responded at different rates to this warming climate. Early-successional species rapidly increased, whereas late-successional species decreased. This shift persisted throughout the next 2700 years. I found two earlier, less-extreme species shifts following rapid warming events around 14,700 and 16,800 years ago. Late-successional species predominated only after 4000 years or more of relatively stable temperature. These results suggest the potential magnitude, duration, and nature of future ecological changes and have implications for conservation plans, especially those incorporating equilibrium assumptions or reconstituting past conditions. When these concepts are extended to include the most rapid early-successional colonizers, they imply that the recent increases in invasive exotics may be only the most noticeable part of a new resurgence of early-successional vegetation. Additionally, my results challenge the reliability of models of future vegetation and carbon balance that project conditions on the basis of assumptions of equilibrium within only a century. ?? 2009 Society for Conservation Biology.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Conservation Biology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1523-1739.2009.01406.x","issn":"08888892","usgsCitation":"Cole, K., 2010, Vegetation response to early holocene warming as an analog for current and future changes: Special section: Conservation Biology, v. 24, no. 1, p. 29-37, https://doi.org/10.1111/j.1523-1739.2009.01406.x.","startPage":"29","endPage":"37","numberOfPages":"9","costCenters":[],"links":[{"id":216595,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1523-1739.2009.01406.x"},{"id":244475,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"24","issue":"1","noUsgsAuthors":false,"publicationDate":"2010-01-15","publicationStatus":"PW","scienceBaseUri":"505bc1e5e4b08c986b32a7f4","contributors":{"authors":[{"text":"Cole, K.L.","contributorId":87507,"corporation":false,"usgs":true,"family":"Cole","given":"K.L.","email":"","affiliations":[],"preferred":false,"id":443510,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70033976,"text":"70033976 - 2010 - Desert wildfire and severe drought diminish survivorship of the long-lived Joshua Tree (Yucca brevifolia; Agavaceae)","interactions":[],"lastModifiedDate":"2012-03-12T17:21:47","indexId":"70033976","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":724,"text":"American Journal of Botany","active":true,"publicationSubtype":{"id":10}},"title":"Desert wildfire and severe drought diminish survivorship of the long-lived Joshua Tree (Yucca brevifolia; Agavaceae)","docAbstract":"Extreme climate events are transforming plant communities in the desert Southwest of the United States. Abundant precipitation in 1998 associated with El Ni??o Southern Oscillation (ENSO) stimulated exceptional alien annual plant production in the Mojave Desert that fueled wildfires in 1999. Exacerbated by protracted drought, 80% of the burned Yucca brevifolia, a long-lived arborescent monocot, and 26% of unburned plants died at Joshua Tree National Park by 2004. Many burned plants < 1 m tall died immediately, and survival of all but the tallest, oldest plants declined to the same low level by 2004. Postfire sprouting prolonged survival, but only at the wetter, high-elevation sites. During succeeding dry years, herbaceous plants were scarce, and individuals of Thomomys bottae (pocket gopher) gnawed the periderm and hollowed stems of Y. brevifolia causing many of them to topple. Thomomys bottae damage reduced plant survivorship at low-elevation, unburned sites and diminished survival of burned plants in all but the driest site, which already had low survival. Accentuated ENSO episodes and more frequent wildfires are expected for the desert Southwest and will likely shift Y. brevifolia population structure toward tall, old adults with fewer opportunities for plant recruitment, thus imperiling the persistence of this unique plant community.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"American Journal of Botany","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.3732/ajb.0900032","issn":"00029122","usgsCitation":"DeFalco, L., Esque, T., Scoles-Sciulla, S., and Rodgers, J., 2010, Desert wildfire and severe drought diminish survivorship of the long-lived Joshua Tree (Yucca brevifolia; Agavaceae): American Journal of Botany, v. 97, no. 2, p. 243-250, https://doi.org/10.3732/ajb.0900032.","startPage":"243","endPage":"250","numberOfPages":"8","costCenters":[],"links":[{"id":216926,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3732/ajb.0900032"},{"id":244828,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"97","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ff30e4b0c8380cd4f07a","contributors":{"authors":[{"text":"DeFalco, L.A.","contributorId":46032,"corporation":false,"usgs":true,"family":"DeFalco","given":"L.A.","affiliations":[],"preferred":false,"id":443474,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Esque, T. C. 0000-0002-4166-6234","orcid":"https://orcid.org/0000-0002-4166-6234","contributorId":76250,"corporation":false,"usgs":true,"family":"Esque","given":"T. C.","affiliations":[],"preferred":false,"id":443475,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Scoles-Sciulla, S. J.","contributorId":12274,"corporation":false,"usgs":true,"family":"Scoles-Sciulla","given":"S. J.","affiliations":[],"preferred":false,"id":443473,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rodgers, J.","contributorId":88427,"corporation":false,"usgs":true,"family":"Rodgers","given":"J.","email":"","affiliations":[],"preferred":false,"id":443476,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70033974,"text":"70033974 - 2010 - Alexandria's Eastern Harbor, Egypt: Pollen, microscopic charcoal, and the transition from natural to human-modified basin","interactions":[],"lastModifiedDate":"2012-03-12T17:21:47","indexId":"70033974","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2220,"text":"Journal of Coastal Research","active":true,"publicationSubtype":{"id":10}},"title":"Alexandria's Eastern Harbor, Egypt: Pollen, microscopic charcoal, and the transition from natural to human-modified basin","docAbstract":"Pollen and microscopic charcoal examined in Holocene sediment core samples record major environmental modifications affecting Alexandria's Eastern Harbor through time. We assess whether such changes on Egypt's coastal margin were influenced primarily by natural, or natural plus human, or primarily human factors. We focus on (1) the times when pollen assemblages and microscopic charcoal content changed in the core, (2) how they changed, and (3) why this occurred. The analysis takes into account the core's stratigraphy, regional climate variability, human history, and local archaeological record. Four pollenmicroscopic charcoal zones are identified. The earliest change occurred at ca. 6000 YBP, during Egypt's earlier Predynastic (Neolithic) period, coinciding with a lithologic break from sand to muddy sand. Pollen during this time indicates a transition to a much drier climate rather than effects of human activity. The second change in pollen occurred 3600-2900 YBP, during a period of continued aridity with no lithologic variation in this core interval. Pollen (cereal taxa, agricultural weeds, grape) and a sharp increase in microscopic charcoal indicate that human activity became prevalent at least 700 y before Alexander the Great's arrival in this region, and these results highlight the transition from a largely natural climatecontrolled environment to one influenced by both climate and anthropogenic activity. The third shift up-core in pollen assemblages is dated at ca. 2300 YBP, at the boundary between a sand and mud unit. It coincides with construction by the Ptolemies of the Heptastadion between Alexandria and Pharos Island. From this time onward, harbor sediment in the nearly enclosed catchment basin indicates a near-continuous record of dominant proximal human activity. ?? 2010 Coastal Education and Research Foundation.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Coastal Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2112/JCOASTRES-D-09-00089.1","issn":"07490208","usgsCitation":"Stanley, J., and Bernhardt, C., 2010, Alexandria's Eastern Harbor, Egypt: Pollen, microscopic charcoal, and the transition from natural to human-modified basin: Journal of Coastal Research, v. 26, no. 1, p. 67-79, https://doi.org/10.2112/JCOASTRES-D-09-00089.1.","startPage":"67","endPage":"79","numberOfPages":"13","costCenters":[],"links":[{"id":244794,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216896,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2112/JCOASTRES-D-09-00089.1"}],"volume":"26","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e95ae4b0c8380cd4820a","contributors":{"authors":[{"text":"Stanley, J.-D.","contributorId":19001,"corporation":false,"usgs":true,"family":"Stanley","given":"J.-D.","email":"","affiliations":[],"preferred":false,"id":443469,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bernhardt, C.E.","contributorId":65554,"corporation":false,"usgs":true,"family":"Bernhardt","given":"C.E.","email":"","affiliations":[],"preferred":false,"id":443470,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70033951,"text":"70033951 - 2010 - Spatial variability of steady-state infiltration into a two-layer soil system on burned hillslopes","interactions":[],"lastModifiedDate":"2012-03-12T17:21:33","indexId":"70033951","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Spatial variability of steady-state infiltration into a two-layer soil system on burned hillslopes","docAbstract":"Rainfall-runoff simulations were conducted to estimate the characteristics of the steady-state infiltration rate into 1-m<sup>2</sup> north- and south-facing hillslope plots burned by a wildfire in October 2003. Soil profiles in the plots consisted of a two-layer system composed of an ash on top of sandy mineral soil. Multiple rainfall rates (18.4-51.2 mm h<sup>-1</sup>) were used during 14 short-duration (30 min) and 2 long-duration simulations (2-4 h). Steady state was reached in 7-26 min. Observed spatially-averaged steady-state infiltration rates ranged from 18.2 to 23.8 mm h<sup>-1</sup> for north-facing and from 17.9 to 36.0 mm h<sup>-1</sup> for south-facing plots. Three different theoretical spatial distribution models of steady-state infiltration rate were fit to the measurements of rainfall rate and steady-state discharge to provided estimates of the spatial average (19.2-22.2 mm h<sup>-1</sup>) and the coefficient of variation (0.11-0.40) of infiltration rates, overland flow contributing area (74-90% of the plot area), and infiltration threshold (19.0-26 mm h<sup>-1</sup>). Tensiometer measurements indicated a downward moving pressure wave and suggest that infiltration-excess overland flow is the runoff process on these burned hillslope with a two-layer system. Moreover, the results indicate that the ash layer is wettable, may restrict water flow into the underlying layer, and increase the infiltration threshold; whereas, the underlying mineral soil, though coarser, limits the infiltration rate. These results of the spatial variability of steady-state infiltration can be used to develop physically-based rainfall-runoff models for burned areas with a two-layer soil system. ?? 2010 Elsevier B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jhydrol.2009.12.004","issn":"00221694","usgsCitation":"Kinner, D., and Moody, J.A., 2010, Spatial variability of steady-state infiltration into a two-layer soil system on burned hillslopes: Journal of Hydrology, v. 381, no. 3-4, p. 322-332, https://doi.org/10.1016/j.jhydrol.2009.12.004.","startPage":"322","endPage":"332","numberOfPages":"11","costCenters":[],"links":[{"id":241815,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214122,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jhydrol.2009.12.004"}],"volume":"381","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b94b5e4b08c986b31abff","contributors":{"authors":[{"text":"Kinner, D.A.","contributorId":99265,"corporation":false,"usgs":true,"family":"Kinner","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":443353,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Moody, J. A.","contributorId":32930,"corporation":false,"usgs":true,"family":"Moody","given":"J.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":443352,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70033949,"text":"70033949 - 2010 - Trends and transformation of nutrients and pesticides in a Coastal Plain aquifer system, United States","interactions":[],"lastModifiedDate":"2012-03-12T17:21:26","indexId":"70033949","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","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":"Trends and transformation of nutrients and pesticides in a Coastal Plain aquifer system, United States","docAbstract":"Four local-scale sites in areas with similar corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] agriculture were studied to determine the effects of different hydrogeologic settings of the Northern Atlantic Coastal Plain (NACP) on the transport of nutrients and pesticides in groundwater. Settings ranged from predominantly well-drained soils overlying thick, sandy surficial aquifers to predominantly poorly drained soils with complex aquifer stratigraphy and high organic matter content. Apparent age of groundwater, dissolved gases, N isotopes, major ions, selected pesticides and degradates, and geochemical environments in groundwater were studied. Agricultural chemicals were the source of most dissolved ions in groundwater. Specific conductance was strongly correlated with reconstructed nitrate (the sum of N in nitrate and N gas) (R<sup>2</sup> = 0.81, p &lt; 0.0001), and is indicative of the relative degree of agricultural effects on groundwater. Trends in nitrate were primarily related to changes in manure and fertilizer use at the well-drained sites where aquifer conditions were consistently oxic. Nitrate was present in young groundwater but completely removed over time through denitrification at the poorly drained sites where there were variations in chemical input and in geochemical environment. Median concentrations of atrazine (6-chloro-N-ethyl-N'-(1- methylethyl)-1,3,5-triazine-2,4-diamine), metolachlor (2-chloro-N-(2-ethyl-6- methylphenyl)-N-(2-methoxy-1-methylethyl)acetamide), and some of their common degradates were higher at well-drained sites than at poorly drained sites, with concentrations of degradates generally higher than those of the parent compounds at all sites. An increase in the percentage of deethylatrazine to total atrazine over time at one well-drained site may be related to changes in manure application. Copyright ?? 2010 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/jeq2009.0107","issn":"00472425","usgsCitation":"Denver, J.M., Tesoriero, A., and Barbaro, J., 2010, Trends and transformation of nutrients and pesticides in a Coastal Plain aquifer system, United States: Journal of Environmental Quality, v. 39, no. 1, p. 154-167, https://doi.org/10.2134/jeq2009.0107.","startPage":"154","endPage":"167","numberOfPages":"14","costCenters":[],"links":[{"id":214574,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2134/jeq2009.0107"},{"id":242309,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"39","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb7d5e4b08c986b3274ee","contributors":{"authors":[{"text":"Denver, J. M.","contributorId":100356,"corporation":false,"usgs":true,"family":"Denver","given":"J.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":443341,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Tesoriero, A. J.","contributorId":99127,"corporation":false,"usgs":true,"family":"Tesoriero","given":"A. J.","affiliations":[],"preferred":false,"id":443340,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Barbaro, J.R.","contributorId":40752,"corporation":false,"usgs":true,"family":"Barbaro","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":443339,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70033946,"text":"70033946 - 2010 - Do common eiders nest in kin groups? Microgeographic genetic structure in a philopatric sea duck","interactions":[],"lastModifiedDate":"2018-08-19T22:21:50","indexId":"70033946","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2774,"text":"Molecular Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Do common eiders nest in kin groups? Microgeographic genetic structure in a philopatric sea duck","docAbstract":"We investigated local genetic associations among female Pacific common eiders (Somateria mollissima v-nigrum) nesting in a stochastic Arctic environment within two groups of barrier islands (Simpson Lagoon and Mikkelsen Bay) in the Beaufort Sea, Alaska. Nonrandom genetic associations were observed among nesting females using regional spatial autocorrelation analyses for distance classes up to 1000 m in Simpson Lagoon. Nearest-neighbour analyses identified clusters of genetically related females with positive lr values observed for 0-13% and 0-7% of the comparisons in Simpson Lagoon and Mikkelsen Bay, respectively, across years. These results indicate that a proportion of females are nesting in close proximity to more genetically related individuals, albeit at low frequency. Such kin groupings may form through active association between relatives or through natal philopatry and breeding site fidelity. Eiders nest in close association with driftwood, which is redistributed annually by seasonal storms. Yet, genetic associations were still observed. Microgeographic structure may thus be more attributable to kin association than natal philopatry and site fidelity. However, habitat availability may also influence the level of structure observed. Regional structure was present only within Simpson Lagoon and this island group includes at least three islands with sufficient driftwood for colonies, whereas only one island at Mikkelsen Bay has these features. A long-term demographic study is needed to understand more fully the mechanisms that lead to fine-scale genetic structure observed in common eiders breeding in the Beaufort Sea. ?? Published 2010. This article is a US Government work and is in the public domain in the USA.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Molecular Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1365-294X.2009.04495.x","issn":"09621083","usgsCitation":"Sonsthagen, S.A., Talbot, S.L., Lanctot, R., and McCracken, K.G., 2010, Do common eiders nest in kin groups? Microgeographic genetic structure in a philopatric sea duck: Molecular Ecology, v. 19, no. 4, p. 647-657, https://doi.org/10.1111/j.1365-294X.2009.04495.x.","startPage":"647","endPage":"657","numberOfPages":"11","costCenters":[],"links":[{"id":242273,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214538,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1365-294X.2009.04495.x"}],"volume":"19","issue":"4","noUsgsAuthors":false,"publicationDate":"2010-01-14","publicationStatus":"PW","scienceBaseUri":"505a035ee4b0c8380cd50458","contributors":{"authors":[{"text":"Sonsthagen, Sarah A. 0000-0001-6215-5874 ssonsthagen@usgs.gov","orcid":"https://orcid.org/0000-0001-6215-5874","contributorId":3711,"corporation":false,"usgs":true,"family":"Sonsthagen","given":"Sarah","email":"ssonsthagen@usgs.gov","middleInitial":"A.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":443329,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Talbot, Sandra L. 0000-0002-3312-7214 stalbot@usgs.gov","orcid":"https://orcid.org/0000-0002-3312-7214","contributorId":140512,"corporation":false,"usgs":true,"family":"Talbot","given":"Sandra","email":"stalbot@usgs.gov","middleInitial":"L.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":443328,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lanctot, Richard B.","contributorId":77879,"corporation":false,"usgs":false,"family":"Lanctot","given":"Richard B.","affiliations":[{"id":6987,"text":"U.S. Fish and Wildlife Sevice","active":true,"usgs":false}],"preferred":false,"id":443330,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"McCracken, Kevin G.","contributorId":72309,"corporation":false,"usgs":false,"family":"McCracken","given":"Kevin","email":"","middleInitial":"G.","affiliations":[{"id":6752,"text":"University of Alaska Fairbanks","active":true,"usgs":false}],"preferred":false,"id":443327,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70033917,"text":"70033917 - 2010 - Patterns of Tamarix water use during a record drought","interactions":[],"lastModifiedDate":"2012-03-12T17:21:33","indexId":"70033917","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2932,"text":"Oecologia","active":true,"publicationSubtype":{"id":10}},"title":"Patterns of Tamarix water use during a record drought","docAbstract":"During a record drought (2006) in southwest Kansas, USA, we assessed groundwater dynamics in a shallow, unconfined aquifer, along with plant water sources and physiological responses of the invasive riparian shrub Tamarix ramosissima. In early May, diel water table fluctuations indicated evapotranspirative consumption of groundwater by vegetation. During the summer drought, the water table elevation dropped past the lowest position previously recorded. Concurrent with this drop, water table fluctuations abruptly diminished at all wells at which they had previously been observed despite increasing evapotranspirative demand. Following reductions in groundwater fluctuations, volumetric water content declined corresponding to the well-specific depths of the capillary fringe in early May, suggesting a switch from primary dependence on groundwater to vadose-zone water. In at least one well, the fluctuations appear to re-intensify in August, suggesting increased groundwater uptake by Tamarix or other non-senesced species from a deeper water table later in the growing season. Our data suggest that Tamarix can rapidly shift water sources in response to declines in the water table. The use of multiple water sources by Tamarix minimized leaf-level water stress during drought periods. This study illustrates the importance of the previous hydrologic conditions experienced by site vegetation for controlling root establishment at depth and demonstrates the utility of data from high-frequency hydrologic monitoring in the interpretation of plant water sources using isotopic methods. ?? Springer-Verlag 2009.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Oecologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s00442-009-1455-1","issn":"00298549","usgsCitation":"Nippert, J., Butler, J., Kluitenberg, G.J., Whittemore, D.O., Arnold, D., Spal, S., and Ward, J., 2010, Patterns of Tamarix water use during a record drought: Oecologia, v. 162, no. 2, p. 283-292, https://doi.org/10.1007/s00442-009-1455-1.","startPage":"283","endPage":"292","numberOfPages":"10","costCenters":[],"links":[{"id":241813,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214121,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s00442-009-1455-1"}],"volume":"162","issue":"2","noUsgsAuthors":false,"publicationDate":"2009-09-13","publicationStatus":"PW","scienceBaseUri":"505a75c4e4b0c8380cd77d27","contributors":{"authors":[{"text":"Nippert, J.B.","contributorId":56457,"corporation":false,"usgs":true,"family":"Nippert","given":"J.B.","affiliations":[],"preferred":false,"id":443166,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Butler, J.J. Jr.","contributorId":12194,"corporation":false,"usgs":true,"family":"Butler","given":"J.J.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":443162,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kluitenberg, Gerard J.","contributorId":93706,"corporation":false,"usgs":false,"family":"Kluitenberg","given":"Gerard","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":443168,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Whittemore, Donald O.","contributorId":28748,"corporation":false,"usgs":false,"family":"Whittemore","given":"Donald","email":"","middleInitial":"O.","affiliations":[],"preferred":false,"id":443164,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Arnold, D.","contributorId":76683,"corporation":false,"usgs":true,"family":"Arnold","given":"D.","affiliations":[],"preferred":false,"id":443167,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Spal, S.E.","contributorId":26892,"corporation":false,"usgs":true,"family":"Spal","given":"S.E.","email":"","affiliations":[],"preferred":false,"id":443163,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Ward, J.K.","contributorId":32740,"corporation":false,"usgs":true,"family":"Ward","given":"J.K.","email":"","affiliations":[],"preferred":false,"id":443165,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70033916,"text":"70033916 - 2010 - Evaluation of aquifer heterogeneity effects on river flow loss using a transition probability framework","interactions":[],"lastModifiedDate":"2012-03-12T17:21:33","indexId":"70033916","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Evaluation of aquifer heterogeneity effects on river flow loss using a transition probability framework","docAbstract":"River-aquifer exchange is considered within a transition probability framework along the Rio Grande in Albuquerque, New Mexico, to provide a stochastic estimate of aquifer heterogeneity and river loss. Six plausible hydrofacies configurations were determined using categorized drill core and wetland survey data processed through the TPROGS geostatistical package. A base case homogeneous model was also constructed for comparison. River loss was simulated for low, moderate, and high Rio Grande stages and several different riverside drain stage configurations. Heterogeneity effects were quantified by determining the mean and variance of the K field for each realization compared to the root-mean-square (RMS) error of the observed groundwater head data. Simulation results showed that the heterogeneous models produced smaller estimates of loss than the homogeneous approximation. Differences between heterogeneous and homogeneous model results indicate that the use of a homogeneous K in a regional-scale model may result in an overestimation of loss but comparable RMS error. We find that the simulated river loss is dependent on the aquifer structure and is most sensitive to the volumetric proportion of fines within the river channel. Copyright 2010 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Water Resources Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2009WR007903","issn":"00431397","usgsCitation":"Engdahl, N., Vogler, E.T., and Weissmann, G., 2010, Evaluation of aquifer heterogeneity effects on river flow loss using a transition probability framework: Water Resources Research, v. 46, no. 1, https://doi.org/10.1029/2009WR007903.","costCenters":[],"links":[{"id":475911,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2009wr007903","text":"Publisher Index Page"},{"id":241812,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214120,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2009WR007903"}],"volume":"46","issue":"1","noUsgsAuthors":false,"publicationDate":"2010-01-15","publicationStatus":"PW","scienceBaseUri":"505a0c48e4b0c8380cd52af1","contributors":{"authors":[{"text":"Engdahl, N.B.","contributorId":22977,"corporation":false,"usgs":true,"family":"Engdahl","given":"N.B.","email":"","affiliations":[],"preferred":false,"id":443159,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Vogler, E. T.","contributorId":55220,"corporation":false,"usgs":true,"family":"Vogler","given":"E.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":443161,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Weissmann, G.S.","contributorId":50927,"corporation":false,"usgs":true,"family":"Weissmann","given":"G.S.","affiliations":[],"preferred":false,"id":443160,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70033863,"text":"70033863 - 2010 - Evidence for debris flow gully formation initiated by shallow subsurface water on Mars","interactions":[],"lastModifiedDate":"2019-02-04T12:08:55","indexId":"70033863","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1963,"text":"Icarus","active":true,"publicationSubtype":{"id":10}},"title":"Evidence for debris flow gully formation initiated by shallow subsurface water on Mars","docAbstract":"<p>The morphologies of some martian gullies appear similar to terrestrial features associated with debris flow initiation, erosion, and deposition. On Earth, debris flows are often triggered by shallow subsurface throughflow of liquid water in slope-mantling colluvium. This flow causes increased levels of pore pressure and thus decreased shear strength, which can lead to slide failure of slope materials and subsequent debris flow. The threshold for pore pressure-induced failure creates a distinct relationship between the contributing area supplying the subsurface flow and the slope gradient. To provide initial tests of a similar debris flow initiation hypothesis for martian gullies, measurements of the contributing areas and slope gradients were made at the channel heads of martian gullies seen in three HiRISE stereo pairs. These gullies exhibit morphologies suggestive of debris flows such as leveed channels and lobate debris fans, and have well-defined channel heads and limited evidence for multiple flows. Our results show an area-slope relationship for these martian gullies that is consistent with that observed for terrestrial gullies formed by debris flow, supporting the hypothesis that these gullies formed as the result of saturation of near-surface regolith by a liquid. This model favors a source of liquid that is broadly distributed within the source area and shallow; we suggest that such liquid could be generated by melting of broadly distributed icy materials such as snow or permafrost. This interpretation is strengthened by observations of polygonal and mantled terrain in the study areas, which are both suggestive of near-surface ice.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Icarus","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.icarus.2009.04.014","issn":"00191035","usgsCitation":"Lanza, N.L., Meyer, G.A., Okubo, C., Newsom, H.E., and Wiens, R., 2010, Evidence for debris flow gully formation initiated by shallow subsurface water on Mars: Icarus, v. 205, no. 1, p. 103-112, https://doi.org/10.1016/j.icarus.2009.04.014.","productDescription":"10 p.","startPage":"103","endPage":"112","numberOfPages":"10","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":242005,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"Mars","volume":"205","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0d39e4b0c8380cd52eb2","contributors":{"authors":[{"text":"Lanza, Nina L.","contributorId":140299,"corporation":false,"usgs":false,"family":"Lanza","given":"Nina","email":"","middleInitial":"L.","affiliations":[{"id":13447,"text":"Los Alamos National Laboratory","active":true,"usgs":false}],"preferred":false,"id":442884,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Meyer, Grant A.","contributorId":26340,"corporation":false,"usgs":false,"family":"Meyer","given":"Grant","email":"","middleInitial":"A.","affiliations":[{"id":7164,"text":"Department of Biology, University of New Mexico, Albuquerque, NM 87131 USA","active":true,"usgs":false}],"preferred":false,"id":442886,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Okubo, Chris 0000-0001-9776-8128 cokubo@usgs.gov","orcid":"https://orcid.org/0000-0001-9776-8128","contributorId":174209,"corporation":false,"usgs":true,"family":"Okubo","given":"Chris","email":"cokubo@usgs.gov","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":442887,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Newsom, Horton E.","contributorId":67689,"corporation":false,"usgs":false,"family":"Newsom","given":"Horton","email":"","middleInitial":"E.","affiliations":[{"id":13339,"text":"University of New Mexico, Albuquerque","active":true,"usgs":false}],"preferred":false,"id":442885,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Wiens, Roger C.","contributorId":80203,"corporation":false,"usgs":true,"family":"Wiens","given":"Roger C.","affiliations":[],"preferred":false,"id":442888,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70033858,"text":"70033858 - 2010 - Pre-eruptive storage conditions of the Holocene dacite erupted from Kizimen Volcano, Kamchatka","interactions":[],"lastModifiedDate":"2012-03-12T17:21:33","indexId":"70033858","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2020,"text":"International Geology Review","active":true,"publicationSubtype":{"id":10}},"title":"Pre-eruptive storage conditions of the Holocene dacite erupted from Kizimen Volcano, Kamchatka","docAbstract":"This study describes an investigation of the pre-eruptive conditions (T, P and fO<sub>2</sub>) of dacite magma erupted during the KZI cycle (12,000-8400 years ago) of Kizimen Volcano, Kamchatka, the earliest, most voluminous and most explosive eruption cycle in the Kizimen record. Hydrothermal, water-saturated experiments on KZI dacite pumice coupled with titanomagnetite-ilmenite geothermometry calculations require that the KZI dacite existed at a temperature of 823 ?? 20??C and pressures of 125-150 MPa immediately prior to eruption. This estimate corresponds to a lithologic contact between Miocene volcaniclastic rocks and Pliocene-Pleistocene volcanic rocks located at a depth of 5-6 km beneath the Kizimen edifice, which may have facilitated the accumulation of atypically large volumes of gas-rich dacite during the KZI cycle.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"International Geology Review","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1080/00206810903332413","issn":"00206814","usgsCitation":"Browne, B., Izbekov, P., Eichelberger, J., and Churikova, T., 2010, Pre-eruptive storage conditions of the Holocene dacite erupted from Kizimen Volcano, Kamchatka: International Geology Review, v. 52, no. 1, p. 95-110, https://doi.org/10.1080/00206810903332413.","startPage":"95","endPage":"110","numberOfPages":"16","costCenters":[],"links":[{"id":214211,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1080/00206810903332413"},{"id":241910,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"52","issue":"1","noUsgsAuthors":false,"publicationDate":"2010-07-12","publicationStatus":"PW","scienceBaseUri":"505a80dae4b0c8380cd7b234","contributors":{"authors":[{"text":"Browne, B.","contributorId":39595,"corporation":false,"usgs":true,"family":"Browne","given":"B.","email":"","affiliations":[],"preferred":false,"id":442863,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Izbekov, P.","contributorId":46748,"corporation":false,"usgs":true,"family":"Izbekov","given":"P.","affiliations":[],"preferred":false,"id":442864,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Eichelberger, J.","contributorId":107442,"corporation":false,"usgs":true,"family":"Eichelberger","given":"J.","email":"","affiliations":[],"preferred":false,"id":442866,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Churikova, T.","contributorId":105544,"corporation":false,"usgs":true,"family":"Churikova","given":"T.","email":"","affiliations":[],"preferred":false,"id":442865,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70033857,"text":"70033857 - 2010 - Surface elevation change and susceptibility of different mangrove zones to sea-level rise on Pacific high islands of Micronesia","interactions":[],"lastModifiedDate":"2019-03-28T16:50:59","indexId":"70033857","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1478,"text":"Ecosystems","active":true,"publicationSubtype":{"id":10}},"title":"Surface elevation change and susceptibility of different mangrove zones to sea-level rise on Pacific high islands of Micronesia","docAbstract":"<p><span>Mangroves on Pacific high islands offer a number of important ecosystem services to both natural ecological communities and human societies. High islands are subjected to constant erosion over geologic time, which establishes an important source of terrigeneous sediment for nearby marine communities. Many of these sediments are deposited in mangrove forests and offer mangroves a potentially important means for adjusting surface elevation with rising sea level. In this study, we investigated sedimentation and elevation dynamics of mangrove forests in three hydrogeomorphic settings on the islands of Kosrae and Pohnpei, Federated States of Micronesia (FSM). Surface accretion rates ranged from 2.9 to 20.8&nbsp;mm&nbsp;y</span><sup>−1</sup><span>, and are high for naturally occurring mangroves. Although mangrove forests in Micronesian high islands appear to have a strong capacity to offset elevation losses by way of sedimentation, elevation change over 6½ years ranged from −3.2 to 4.1&nbsp;mm&nbsp;y</span><sup>−1</sup><span>, depending on the location. Mangrove surface elevation change also varied by hydrogeomorphic setting and river, and suggested differential, and not uniformly bleak, susceptibilities among Pacific high island mangroves to sea-level rise. Fringe, riverine, and interior settings registered elevation changes of −1.30, 0.46, and 1.56&nbsp;mm&nbsp;y</span><sup>−1</sup><span>, respectively, with the greatest elevation deficit (−3.2&nbsp;mm&nbsp;y</span><sup>−1</sup><span>) from a fringe zone on Pohnpei and the highest rate of elevation gain (4.1&nbsp;mm&nbsp;y</span><sup>−1</sup><span>) from an interior zone on Kosrae. Relative to sea-level rise estimates for FSM (0.8–1.8&nbsp;mm&nbsp;y</span><sup>−1</sup><span>) and assuming a consistent linear trend in these estimates, soil elevations in mangroves on Kosrae and Pohnpei are experiencing between an annual deficit of 4.95&nbsp;mm and an annual surplus of 3.28&nbsp;mm. Although natural disturbances are important in mediating elevation gain in some situations, constant allochthonous sediment deposition probably matters most on these Pacific high islands, and is especially helpful in certain hydrogeomorphic zones. Fringe mangrove forests are most susceptible to sea-level rise, such that protection of these outer zones from anthropogenic disturbances (for example, harvesting) may slow the rate at which these zones convert to open water.</span></p>","language":"English","publisher":"Springer","doi":"10.1007/s10021-009-9307-8","issn":"14329840","usgsCitation":"Krauss, K., Cahoon, D.R., Allen, J.A., Ewel, K.C., Lynch, J., and Cormier, N., 2010, Surface elevation change and susceptibility of different mangrove zones to sea-level rise on Pacific high islands of Micronesia: Ecosystems, v. 13, no. 1, p. 129-143, https://doi.org/10.1007/s10021-009-9307-8.","productDescription":"15 p.","startPage":"129","endPage":"143","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true},{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"links":[{"id":241909,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214210,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10021-009-9307-8"}],"volume":"13","issue":"1","noUsgsAuthors":false,"publicationDate":"2010-01-05","publicationStatus":"PW","scienceBaseUri":"505b9fa6e4b08c986b31e74e","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":442857,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cahoon, Donald R. 0000-0002-2591-5667","orcid":"https://orcid.org/0000-0002-2591-5667","contributorId":65424,"corporation":false,"usgs":true,"family":"Cahoon","given":"Donald","email":"","middleInitial":"R.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true},{"id":455,"text":"National Wetlands Research Center","active":true,"usgs":true}],"preferred":false,"id":442860,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Allen, J. A.","contributorId":82644,"corporation":false,"usgs":false,"family":"Allen","given":"J.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":442862,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ewel, K. C.","contributorId":70352,"corporation":false,"usgs":true,"family":"Ewel","given":"K.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":442861,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Lynch, J.C.","contributorId":25104,"corporation":false,"usgs":true,"family":"Lynch","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":442858,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Cormier, Nicole 0000-0003-2453-9900","orcid":"https://orcid.org/0000-0003-2453-9900","contributorId":33822,"corporation":false,"usgs":true,"family":"Cormier","given":"Nicole","affiliations":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"preferred":false,"id":442859,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70033833,"text":"70033833 - 2010 - Effects of altered groundwater chemistry upon the pH-dependency and magnitude of bacterial attachment during transport within an organically contaminated sandy aquifer","interactions":[],"lastModifiedDate":"2018-10-11T10:29:52","indexId":"70033833","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3716,"text":"Water Research","onlineIssn":"1879-2448","printIssn":"0043-1354","active":true,"publicationSubtype":{"id":10}},"title":"Effects of altered groundwater chemistry upon the pH-dependency and magnitude of bacterial attachment during transport within an organically contaminated sandy aquifer","docAbstract":"<p><span>The effects of a dilute (ionic strength</span><span>&nbsp;</span><span>=</span><span>&nbsp;</span><span>5</span><span>&nbsp;</span><span>×</span><span>&nbsp;</span><span>10</span><sup>−3</sup><span>&nbsp;</span><span>M) plume of treated sewage, with elevated levels (3.9</span><span>&nbsp;</span><span>mg/L) of dissolved organic carbon (DOC), upon the pH-dependency and magnitude of bacterial transport through an iron-laden, quartz sand aquifer (Cape Cod, MA) were evaluated using sets of replicate, static minicolumns. Compared with uncontaminated groundwater, the plume chemistry diminished bacterial attachment under mildly acidic (pH 5.0–6.5) in-situ conditions, in spite of the 5-fold increase in ionic strength and substantively enhanced attachment under more alkaline conditions. The effects of the hydrophobic neutral and total fractions of the plume DOC; modest concentrations of fulvic and humic acids (1.5</span><span>&nbsp;</span><span>mg/L); linear alkyl benzene sulfonate (LAS) (25</span><span>&nbsp;</span><span>mg/L); Imbentin (200</span><span>&nbsp;</span><span>μg/L), a model nonionic surfactant; sulfate (28</span><span>&nbsp;</span><span>mg/L); and calcium (20</span><span>&nbsp;</span><span>mg/L) varied sharply in response to relatively small changes in pH, although the plume constituents collectively decreased the pH-dependency of bacterial attachment. LAS and other hydrophobic neutrals (collectively representing only ∼3% of the plume DOC) had a disproportionately large effect upon bacterial attachment, as did the elevated concentrations of sulfate within the plume. The findings further suggest that the roles of organic plume constituents in transport or bacteria through acidic aquifer sediments can be very different than would be predicted from column studies performed at circumneutral pH and that the inorganic constituents within the plume cannot be ignored.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.watres.2009.09.008","issn":"00431354","usgsCitation":"Harvey, R.W., Metge, D.W., Barber, L.B., and Aiken, G.R., 2010, Effects of altered groundwater chemistry upon the pH-dependency and magnitude of bacterial attachment during transport within an organically contaminated sandy aquifer: Water Research, v. 44, no. 4, p. 1062-1071, https://doi.org/10.1016/j.watres.2009.09.008.","productDescription":"10 p.","startPage":"1062","endPage":"1071","numberOfPages":"10","ipdsId":"IP-014986","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"links":[{"id":242071,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214351,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.watres.2009.09.008"}],"volume":"44","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0684e4b0c8380cd512a0","contributors":{"authors":[{"text":"Harvey, Ronald W. 0000-0002-2791-8503 rwharvey@usgs.gov","orcid":"https://orcid.org/0000-0002-2791-8503","contributorId":564,"corporation":false,"usgs":true,"family":"Harvey","given":"Ronald","email":"rwharvey@usgs.gov","middleInitial":"W.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":703767,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Metge, David W. dwmetge@usgs.gov","contributorId":663,"corporation":false,"usgs":true,"family":"Metge","given":"David","email":"dwmetge@usgs.gov","middleInitial":"W.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":703768,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Barber, Larry B. 0000-0002-0561-0831 lbbarber@usgs.gov","orcid":"https://orcid.org/0000-0002-0561-0831","contributorId":921,"corporation":false,"usgs":true,"family":"Barber","given":"Larry","email":"lbbarber@usgs.gov","middleInitial":"B.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":703769,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Aiken, George R. 0000-0001-8454-0984 graiken@usgs.gov","orcid":"https://orcid.org/0000-0001-8454-0984","contributorId":1322,"corporation":false,"usgs":true,"family":"Aiken","given":"George","email":"graiken@usgs.gov","middleInitial":"R.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true}],"preferred":true,"id":703770,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70033832,"text":"70033832 - 2010 - Event-driven sediment flux in Hueneme and Mugu submarine canyons, southern California","interactions":[],"lastModifiedDate":"2013-05-14T11:37:15","indexId":"70033832","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2667,"text":"Marine Geology","active":true,"publicationSubtype":{"id":10}},"title":"Event-driven sediment flux in Hueneme and Mugu submarine canyons, southern California","docAbstract":"Vertical sediment fluxes and their dominant controlling processes in Hueneme and Mugu submarine canyons off south-central California were assessed using data from sediment traps and current meters on two moorings that were deployed for 6 months during the winter of 2007. The maxima of total particulate flux, which reached as high as 300+ g/m<sup>2</sup>/day in Hueneme Canyon, were recorded during winter storm events when high waves and river floods often coincided. During these winter storms, wave-induced resuspension of shelf sediment was a major source for the elevated sediment fluxes. Canyon rim morphology, rather than physical proximity to an adjacent river mouth, appeared to control the magnitude of sediment fluxes in these two submarine canyon systems. Episodic turbidity currents and internal bores enhanced sediment fluxes, particularly in the lower sediment traps positioned 30 m above the canyon floor. Lower excess <sup>210</sup>Pb activities measured in the sediment samples collected during periods of peak total particulate flux further substantiate that reworked shelf-, rather than newly introduced river-borne, sediments supply most of the material entering these canyons during storms.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Marine Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.margeo.2009.12.007","issn":"00253227","usgsCitation":"Xu, J.P., Swarzenski, P., Noble, M., and Li, A., 2010, Event-driven sediment flux in Hueneme and Mugu submarine canyons, southern California: Marine Geology, v. 269, no. 1-2, p. 74-88, https://doi.org/10.1016/j.margeo.2009.12.007.","productDescription":"15 p.","startPage":"74","endPage":"88","costCenters":[{"id":586,"text":"Tinker & Estes Lab and Santa Cruz Field Station","active":false,"usgs":true}],"links":[{"id":214321,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.margeo.2009.12.007"},{"id":242038,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"269","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0d23e4b0c8380cd52e2b","contributors":{"authors":[{"text":"Xu, J. P.","contributorId":74528,"corporation":false,"usgs":true,"family":"Xu","given":"J.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":442758,"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":442756,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Noble, M.","contributorId":15340,"corporation":false,"usgs":true,"family":"Noble","given":"M.","email":"","affiliations":[],"preferred":false,"id":442755,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Li, A.-C.","contributorId":50740,"corporation":false,"usgs":true,"family":"Li","given":"A.-C.","email":"","affiliations":[],"preferred":false,"id":442757,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
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