{"pageNumber":"743","pageRowStart":"18550","pageSize":"25","recordCount":46677,"records":[{"id":70033942,"text":"70033942 - 2010 - Testing alternative models of climate-mediated extirpations","interactions":[],"lastModifiedDate":"2012-03-12T17:21:31","indexId":"70033942","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1450,"text":"Ecological Applications","active":true,"publicationSubtype":{"id":10}},"title":"Testing alternative models of climate-mediated extirpations","docAbstract":"Biotic responses to climate change will vary among taxa and across latitudes, elevational gradients, and degrees of insularity. However, due to factors such as phenotypic plasticity, ecotypic variation, and evolved tolerance to thermal stress, it remains poorly understood whether losses should be greatest in populations experiencing the greatest climatic change or living in places where the prevailing climate is closest to the edge of the species' bioclimatic envelope (e.g., at the hottest, driest sites). Research on American pikas (Ochotona princeps) in montane areas of the Great Basin during 1994-1999 suggested that 20th-century population extirpations were predicted by a combination of biogeographic, anthropogenic, and especially climatic factors. Surveys during 2005-2007 documented additional extirpations and within-site shifts of pika distributions at remaining sites. To evaluate the evidence in support of alternative hypotheses involving effects of thermal stress on pikas, we placed temperature sensors at 156 locations within pika habitats in the vicinity of 25 sites with historical records of pikas in the Basin. We related these time series of sensor data to data on ambient temperature from weather stations within the Historical Climate Network. We then used these highly correlated relationships, combined with long-term data from the same weather stations, to hindcast temperatures within pika habitats from 1945 through 2006. To explain patterns of loss, we posited three alternative classes of direct thermal stress: (1) acute cold stress (number of days below a threshold temperature); (2) acute heat stress (number of days above a threshold, temperature); and. (3) chronic heat stress (average summer temperature). Climate change was defined as change in our thermal metrics between two 31-y.r periods: 1945-1975 and 1976-2006. We found that patterns of persistence were well predicted by metrics of climate. Our best models suggest some effects of climate change; however, recent and long-term metrics of chronic heat stress and acute cold stress, neither previously recognized as sources of stress for pikas, were some of the best predictors of pika persistence. Results illustrate that extremely rapid distributional shifts can be explained by climatic influences and have implications for conservation topics such as reintroductions and early-warning indicators. ?? 2010 by the Ecological society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecological Applications","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1890/08-1011.1","issn":"10510761","usgsCitation":"Beever, E., Chris, R., Mote, P., and Wilkening, J., 2010, Testing alternative models of climate-mediated extirpations: Ecological Applications, v. 20, no. 1, p. 164-178, https://doi.org/10.1890/08-1011.1.","startPage":"164","endPage":"178","numberOfPages":"15","costCenters":[],"links":[{"id":214481,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1890/08-1011.1"},{"id":242209,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"20","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba5bae4b08c986b320c2d","contributors":{"authors":[{"text":"Beever, E.A.","contributorId":80040,"corporation":false,"usgs":true,"family":"Beever","given":"E.A.","email":"","affiliations":[],"preferred":false,"id":443305,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chris, R.A.Y.","contributorId":86185,"corporation":false,"usgs":true,"family":"Chris","given":"R.A.Y.","email":"","affiliations":[],"preferred":false,"id":443306,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mote, P.W.","contributorId":50743,"corporation":false,"usgs":true,"family":"Mote","given":"P.W.","email":"","affiliations":[],"preferred":false,"id":443303,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Wilkening, J.L.","contributorId":59259,"corporation":false,"usgs":true,"family":"Wilkening","given":"J.L.","affiliations":[],"preferred":false,"id":443304,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70192280,"text":"70192280 - 2010 - Shaded seafloor relief, backscatter strength, and surficial geology; German Bank, Scotian Shelf, offshore Nova Scotia","interactions":[],"lastModifiedDate":"2018-02-20T13:20:46","indexId":"70192280","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":4,"text":"Other Government Series"},"seriesTitle":{"id":5589,"text":"Open File","active":true,"publicationSubtype":{"id":4}},"seriesNumber":"6124","title":"Shaded seafloor relief, backscatter strength, and surficial geology; German Bank, Scotian Shelf, offshore Nova Scotia","docAbstract":"<p>This map is part of a three-map series of German Bank, located on the Scotian Shelf off southern Nova Scotia.&nbsp; This map is the product of a number of surveys (1997-2003) that used a multibeam sonar system to map 5321 km<sup>2</sup> of the seafloor.&nbsp; Other surveys collected geological data for scientific interpretation.&nbsp; This map sheet shows the seafloor topography of German Bank in shaded-relief view and seafloor depth (coded by colour) at a scale of 1:1000,000.&nbsp; Topographic contours generated from the multibeam data are shown (in white) on the colour-coded multibeam topography at a depth interval of 20 m.&nbsp; Bathymetic contours (in blue) outside the multibeam survey area, presented at a depth interval of 10 m, are from the Natural Resource Map series (Canadian Hydrographic Service, 1967, 1971a, 1971b, 1972). Sheet 2 shows coloured backscatter strength in shaded-relief view.&nbsp; Sheet 3 shows seafloor topography in shaded-relief view with colour-coded surficial geological units.</p>","language":"English","publisher":"Geological Survey of Canada","doi":"10.4095/261833","usgsCitation":"Todd, B., and Valentine, P.C., 2010, Shaded seafloor relief, backscatter strength, and surficial geology; German Bank, Scotian Shelf, offshore Nova Scotia: Open File 6124, 3 Sheets: 59.56 x 40.18 inches or smaller, https://doi.org/10.4095/261833.","productDescription":"3 Sheets: 59.56 x 40.18 inches or smaller","ipdsId":"IP-014439","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":475950,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.4095/261833","text":"Publisher Index Page"},{"id":351824,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":347195,"type":{"id":15,"text":"Index Page"},"url":"https://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/fulle.web&search1=R=261833"}],"country":"United States","state":"Nova Scotia","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -66.85,\n              43.7\n            ],\n            [\n              -65.45,\n              43.7\n            ],\n            [\n              -65.45,\n              42.9667\n            ],\n            [\n              -66.85,\n              42.9667\n            ],\n            [\n              -66.85,\n              43.7\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","publishingServiceCenter":{"id":11,"text":"Pembroke PSC"},"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5afef89ee4b0da30c1bfc9c4","contributors":{"authors":[{"text":"Todd, B.J.","contributorId":120970,"corporation":false,"usgs":false,"family":"Todd","given":"B.J.","email":"","affiliations":[],"preferred":false,"id":715123,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Valentine, Page C. 0000-0002-0485-6266 pvalentine@usgs.gov","orcid":"https://orcid.org/0000-0002-0485-6266","contributorId":1947,"corporation":false,"usgs":true,"family":"Valentine","given":"Page","email":"pvalentine@usgs.gov","middleInitial":"C.","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":715121,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70037286,"text":"70037286 - 2010 - Quantifying restoration success and recovery in a metal-polluted stream: A 17-year assessment of physicochemical and biological responses","interactions":[],"lastModifiedDate":"2012-03-12T17:22:07","indexId":"70037286","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2163,"text":"Journal of Applied Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Quantifying restoration success and recovery in a metal-polluted stream: A 17-year assessment of physicochemical and biological responses","docAbstract":"Evaluating the effectiveness of stream restoration is often challenging because of the lack of pre-treatment data, narrow focus on physicochemical measures and insufficient post-restoration monitoring. Even when these fundamental elements are present, quantifying restoration success is difficult because of the challenges associated with distinguishing treatment effects from seasonal variation, episodic events and long-term climatic changes.2. We report results of one of the most comprehensive and continuous records of physical, chemical and biological data available to assess restoration success for a stream ecosystem in North America. Over a 17 year period we measured seasonal and annual changes in metal concentrations, physicochemical characteristics, macroinvertebrate communities, and brown trout Salmo trutta populations in the Arkansas River, a metal-contaminated stream in Colorado, USA.3. Although we observed significant improvements in water quality after treatment, the effectiveness of restoration varied temporally, spatially and among biological response variables. The fastest recovery was observed at stations where restoration eliminated point sources of metal contamination. Recovery of macroinvertebrates was significantly delayed at some stations because of residual sediment contamination and because extreme seasonal and episodic variation in metal concentrations prevented recolonization by sensitive species. Synthesis and applications. Because recovery trajectories after the removal of a stressor are often complex or nonlinear, long-term studies are necessary to assess restoration success within the context of episodic events and changes in regional climate. The observed variation in recovery among chemical and biological endpoints highlights the importance of developing objective criteria to assess restoration success. Although the rapid response of macroinvertebrates to reduced metal concentrations is encouraging, we have previously demonstrated that benthic communities from the Arkansas River remained susceptible to other novel anthropogenic stressors. We suggest that the resistance or resilience of benthic macroinvertebrate communities to novel stressors may be effective indicators of restoration success that can account for the non-additive (e.g. synergistic) nature of compound perturbations. ?? 2010 The Authors. Journal compilation ?? 2010 British Ecological Society.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Applied Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1365-2664.2010.01838.x","issn":"00218901","usgsCitation":"Clements, W., Vieira, N., and Church, S.E., 2010, Quantifying restoration success and recovery in a metal-polluted stream: A 17-year assessment of physicochemical and biological responses: Journal of Applied Ecology, v. 47, no. 4, p. 899-910, https://doi.org/10.1111/j.1365-2664.2010.01838.x.","startPage":"899","endPage":"910","numberOfPages":"12","costCenters":[],"links":[{"id":475855,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1365-2664.2010.01838.x","text":"Publisher Index Page"},{"id":217318,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1365-2664.2010.01838.x"},{"id":245256,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"47","issue":"4","noUsgsAuthors":false,"publicationDate":"2010-06-29","publicationStatus":"PW","scienceBaseUri":"505a91dae4b0c8380cd804da","contributors":{"authors":[{"text":"Clements, W.H.","contributorId":78855,"corporation":false,"usgs":true,"family":"Clements","given":"W.H.","email":"","affiliations":[],"preferred":false,"id":460282,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Vieira, N.K.M.","contributorId":71034,"corporation":false,"usgs":true,"family":"Vieira","given":"N.K.M.","email":"","affiliations":[],"preferred":false,"id":460281,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Church, S. E.","contributorId":58260,"corporation":false,"usgs":true,"family":"Church","given":"S.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":460280,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70176252,"text":"70176252 - 2010 - Biological community structure on patch reefs in Biscayne National Park, FL, USA","interactions":[],"lastModifiedDate":"2016-09-06T11:34:10","indexId":"70176252","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1552,"text":"Environmental Monitoring and Assessment","onlineIssn":"1573-2959","printIssn":"0167-6369","active":true,"publicationSubtype":{"id":10}},"title":"Biological community structure on patch reefs in Biscayne National Park, FL, USA","docAbstract":"<p><span>Coral reef ecosystem management benefits from continual quantitative assessment of the resources being managed, plus assessment of factors that affect distribution patterns of organisms in the ecosystem. In this study, we investigate the relationships among physical, benthic, and fish variables in an effort to help explain the distribution patterns of organisms on patch reefs within Biscayne National Park, FL, USA. We visited a total of 196 randomly selected sampling stations on 12 shallow (&lt;10&nbsp;m) patch reefs and measured physical variables (e.g., substratum rugosity, substratum type) and benthic and fish community variables. We also incorporated data on substratum rugosity collected remotely via airborne laser surveying (Experimental Advanced Airborne Research Lidar—EAARL). Across all stations, only weak relationships were found between physical, benthic cover, and fish assemblage variables. Much of the variance was attributable to a “reef effect,” meaning that community structure and organism abundances were more variable at stations among reefs than within reefs. However, when the reef effect was accounted for and removed statistically, patterns were detected. Within reefs, juvenile scarids were most abundant at stations with high coverage of the fleshy macroalgae </span><i class=\"EmphasisTypeItalic \">Dictyota</i><span> spp., and the calcified alga </span><i class=\"EmphasisTypeItalic \">Halimeda tuna</i><span> was most abundant at stations with low EAARL rugosity. Explanations for the overwhelming importance of “reef” in explaining variance in our dataset could include the stochastic arrangement of organisms on patch reefs related to variable larval recruitment in space and time and/or strong historical effects due to patchy disturbances (e.g., hurricanes, fishing), as well as legacy effects of prior residents (“priority” effects).</span></p>","language":"English","publisher":"Springer","doi":"10.1007/s10661-009-0910-0","usgsCitation":"Kuffner, I.B., Grober-Dunsmore, R., Brock, J., and Hickey, T.D., 2010, Biological community structure on patch reefs in Biscayne National Park, FL, USA: Environmental Monitoring and Assessment, v. 164, no. 1, p. 513-531, https://doi.org/10.1007/s10661-009-0910-0.","productDescription":"19 p.","startPage":"513","endPage":"531","costCenters":[{"id":574,"text":"St. Petersburg Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":489187,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1007/s10661-009-0910-0","text":"Publisher Index Page"},{"id":328239,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Florida","otherGeospatial":"Biscayne National Park","volume":"164","issue":"1","noUsgsAuthors":false,"publicationDate":"2009-04-28","publicationStatus":"PW","scienceBaseUri":"57cfe8b0e4b04836416a0d2b","contributors":{"authors":[{"text":"Kuffner, Ilsa B. 0000-0001-8804-7847 ikuffner@usgs.gov","orcid":"https://orcid.org/0000-0001-8804-7847","contributorId":3105,"corporation":false,"usgs":true,"family":"Kuffner","given":"Ilsa","email":"ikuffner@usgs.gov","middleInitial":"B.","affiliations":[{"id":574,"text":"St. Petersburg Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":648088,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Grober-Dunsmore, Rikki","contributorId":71292,"corporation":false,"usgs":true,"family":"Grober-Dunsmore","given":"Rikki","email":"","affiliations":[],"preferred":false,"id":648089,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Brock, John 0000-0002-5289-9332 jbrock@usgs.gov","orcid":"https://orcid.org/0000-0002-5289-9332","contributorId":2261,"corporation":false,"usgs":true,"family":"Brock","given":"John","email":"jbrock@usgs.gov","affiliations":[{"id":5061,"text":"National Cooperative Geologic Mapping and Landslide Hazards","active":true,"usgs":true}],"preferred":true,"id":648090,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hickey, T. Don","contributorId":49066,"corporation":false,"usgs":true,"family":"Hickey","given":"T.","email":"","middleInitial":"Don","affiliations":[],"preferred":false,"id":648091,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70159357,"text":"70159357 - 2010 - Measurement of bedload transport in sand-bed rivers: A look at two indirect sampling methods","interactions":[],"lastModifiedDate":"2021-10-27T16:40:23.473766","indexId":"70159357","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Measurement of bedload transport in sand-bed rivers: A look at two indirect sampling methods","docAbstract":"<p><span>Sand-bed rivers present unique challenges to accurate measurement of the bedload transport rate using the traditional direct sampling methods of direct traps (for example the Helley-Smith bedload sampler). The two major issues are: 1) over sampling of sand transport caused by &ldquo;mining&rdquo; of sand due to the flow disturbance induced by the presence of the sampler and 2) clogging of the mesh bag with sand particles reducing the hydraulic efficiency of the sampler. Indirect measurement methods hold promise in that unlike direct methods, no transport-altering flow disturbance near the bed occurs. The bedform velocimetry method utilizes a measure of the bedform geometry and the speed of bedform translation to estimate the bedload transport through mass balance. The bedform velocimetry method is readily applied for the estimation of bedload transport in large sand-bed rivers so long as prominent bedforms are present and the streamflow discharge is steady for long enough to provide sufficient bedform translation between the successive bathymetric data sets. Bedform velocimetry in small sandbed rivers is often problematic due to rapid variation within the hydrograph. The bottom-track bias feature of the acoustic Doppler current profiler (ADCP) has been utilized to accurately estimate the virtual velocities of sand-bed rivers. Coupling measurement of the virtual velocity with an accurate determination of the active depth of the streambed sediment movement is another method to measure bedload transport, which will be termed the &ldquo;virtual velocity&rdquo; method. Much research remains to develop methods and determine accuracy of the virtual velocity method in small sand-bed rivers.</span></p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Bedload-surrogate monitoring technologies","largerWorkSubtype":{"id":15,"text":"Monograph"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, Virginia","usgsCitation":"Holmes, R., 2010, Measurement of bedload transport in sand-bed rivers: A look at two indirect sampling methods, chap. <i>of</i> Bedload-surrogate monitoring technologies, p. 236-252.","productDescription":"16 p.","startPage":"236","endPage":"252","onlineOnly":"N","additionalOnlineFiles":"N","ipdsId":"IP-004287","costCenters":[{"id":502,"text":"Office of Surface Water","active":true,"usgs":true}],"links":[{"id":310567,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Missouri","city":"St. Louis","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -90.18264770507812,\n              38.766398104806264\n            ],\n            [\n              -90.1702880859375,\n              38.76318574559655\n            ],\n            [\n              -90.17715454101562,\n              38.74605072069108\n            ],\n            [\n              -90.18539428710938,\n              38.72944724289828\n            ],\n            [\n              -90.19157409667967,\n              38.71230412063499\n            ],\n            [\n              -90.19569396972656,\n              38.69301319283493\n            ],\n            [\n              -90.17990112304688,\n              38.66889221556877\n            ],\n            [\n              -90.17578124999999,\n              38.64208159560713\n            ],\n            [\n              -90.19020080566406,\n              38.59809045854761\n            ],\n            [\n              -90.22796630859375,\n              38.564810956372185\n            ],\n            [\n              -90.24650573730467,\n              38.53957267203905\n            ],\n            [\n              -90.25474548339844,\n              38.54010974905484\n            ],\n            [\n              -90.2471923828125,\n              38.5535353710587\n            ],\n            [\n              -90.23483276367188,\n              38.57071650940461\n            ],\n            [\n              -90.21697998046875,\n              38.58306291549108\n            ],\n            [\n              -90.19157409667967,\n              38.60828592850559\n            ],\n            [\n              -90.17921447753906,\n              38.64261790634527\n            ],\n            [\n              -90.19500732421875,\n              38.67961365359827\n            ],\n            [\n              -90.21286010742188,\n              38.70319516433674\n            ],\n            [\n              -90.2149200439453,\n              38.71766178810086\n            ],\n            [\n              -90.21148681640625,\n              38.73158984401968\n            ],\n            [\n              -90.18951416015625,\n              38.749263851188104\n            ],\n            [\n              -90.1812744140625,\n              38.762114927054405\n            ],\n            [\n              -90.18264770507812,\n              38.766398104806264\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"562a08d8e4b011227bf1fd8c","contributors":{"editors":[{"text":"Gray, John R. 0000-0002-8817-3701 jrgray@usgs.gov","orcid":"https://orcid.org/0000-0002-8817-3701","contributorId":1158,"corporation":false,"usgs":true,"family":"Gray","given":"John","email":"jrgray@usgs.gov","middleInitial":"R.","affiliations":[{"id":5058,"text":"Office of the Chief Scientist for Water","active":true,"usgs":true}],"preferred":true,"id":578192,"contributorType":{"id":2,"text":"Editors"},"rank":1},{"text":"Laronne, Jonathan B.","contributorId":8778,"corporation":false,"usgs":true,"family":"Laronne","given":"Jonathan","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":578193,"contributorType":{"id":2,"text":"Editors"},"rank":2},{"text":"Marr, Jeffrey D. G.","contributorId":80791,"corporation":false,"usgs":false,"family":"Marr","given":"Jeffrey","email":"","middleInitial":"D. G.","affiliations":[{"id":47665,"text":"St. Anthony Falls Laboratory, University of Minnesota, Minneapolis, MN, USA","active":true,"usgs":false}],"preferred":false,"id":578194,"contributorType":{"id":2,"text":"Editors"},"rank":3}],"authors":[{"text":"Holmes, Robert R. Jr. 0000-0002-5060-3999","orcid":"https://orcid.org/0000-0002-5060-3999","contributorId":149380,"corporation":false,"usgs":true,"family":"Holmes","given":"Robert R.","suffix":"Jr.","affiliations":[],"preferred":false,"id":578191,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70193762,"text":"70193762 - 2010 - Improved hydrogeophysical characterization and monitoring through parallel modeling and inversion of time-domain resistivity andinduced-polarization data","interactions":[],"lastModifiedDate":"2019-10-23T17:00:27","indexId":"70193762","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1808,"text":"Geophysics","active":true,"publicationSubtype":{"id":10}},"title":"Improved hydrogeophysical characterization and monitoring through parallel modeling and inversion of time-domain resistivity andinduced-polarization data","docAbstract":"<p><span>Electrical geophysical methods have found wide use in the growing discipline of hydrogeophysics for characterizing the electrical properties of the subsurface and for monitoring subsurface processes in terms of the spatiotemporal changes in subsurface conductivity, chargeability, and source currents they govern. Presently, multichannel and multielectrode data collections systems can collect large data sets in relatively short periods of time. Practitioners, however, often are unable to fully utilize these large data sets and the information they contain because of standard desktop-computer processing limitations. These limitations can be addressed by utilizing the storage and processing capabilities of parallel computing environments. We have developed a parallel distributed-memory forward and inverse modeling algorithm for analyzing resistivity and time-domain induced polar-ization (IP) data. The primary components of the parallel computations include distributed computation of the pole solutions in forward mode, distributed storage and computation of the Jacobian matrix in inverse mode, and parallel execution of the inverse equation solver. We have tested the corresponding parallel code in three efforts: (1) resistivity characterization of the Hanford 300 Area Integrated Field Research Challenge site in Hanford, Washington, U.S.A., (2) resistivity characterization of a volcanic island in the southern Tyrrhenian Sea in Italy, and (3) resistivity and IP monitoring of biostimulation at a Superfund site in Brandywine, Maryland, U.S.A. Inverse analysis of each of these data sets would be limited or impossible in a standard serial computing environment, which underscores the need for parallel high-performance computing to fully utilize the potential of electrical geophysical methods in hydrogeophysical applications.</span></p>","language":"English","publisher":"Society of Exploration Geophysicists","doi":"10.1190/1.3475513","usgsCitation":"Johnson, T., Versteeg, R.J., Ward, A., Day-Lewis, F.D., and Revil, A., 2010, Improved hydrogeophysical characterization and monitoring through parallel modeling and inversion of time-domain resistivity andinduced-polarization data: Geophysics, v. 75, no. 4, p. WA27-WA41, https://doi.org/10.1190/1.3475513.","productDescription":"15 p.","startPage":"WA27","endPage":"WA41","ipdsId":"IP-017886","costCenters":[{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true},{"id":493,"text":"Office of Ground Water","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":349080,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"75","issue":"4","publishingServiceCenter":{"id":11,"text":"Pembroke PSC"},"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5a610acee4b06e28e9c256e7","contributors":{"authors":[{"text":"Johnson, Timothy C.","contributorId":99884,"corporation":false,"usgs":true,"family":"Johnson","given":"Timothy C.","affiliations":[],"preferred":false,"id":722689,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Versteeg, Roelof J.","contributorId":199843,"corporation":false,"usgs":false,"family":"Versteeg","given":"Roelof","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":722690,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ward, Andy","contributorId":7184,"corporation":false,"usgs":true,"family":"Ward","given":"Andy","email":"","affiliations":[],"preferred":false,"id":722691,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Day-Lewis, Frederick D. 0000-0003-3526-886X daylewis@usgs.gov","orcid":"https://orcid.org/0000-0003-3526-886X","contributorId":1672,"corporation":false,"usgs":true,"family":"Day-Lewis","given":"Frederick","email":"daylewis@usgs.gov","middleInitial":"D.","affiliations":[{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":493,"text":"Office of Ground Water","active":true,"usgs":true}],"preferred":true,"id":722692,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Revil, André","contributorId":38879,"corporation":false,"usgs":true,"family":"Revil","given":"André","affiliations":[],"preferred":false,"id":722693,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70193766,"text":"70193766 - 2010 - Marine electrical resistivity imaging of submarine groundwater discharge: Sensitivity analysis and application in Waquoit Bay, Massachusetts, USA","interactions":[],"lastModifiedDate":"2019-10-21T12:49:34","indexId":"70193766","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1923,"text":"Hydrogeology Journal","active":true,"publicationSubtype":{"id":10}},"title":"Marine electrical resistivity imaging of submarine groundwater discharge: Sensitivity analysis and application in Waquoit Bay, Massachusetts, USA","docAbstract":"<p>Electrical resistivity imaging has been used in coastal settings to characterize fresh submarine groundwater discharge and the position of the freshwater/salt-water interface because of the relation of bulk electrical conductivity to pore-fluid conductivity, which in turn is a function of salinity. Interpretation of tomograms for hydrologic processes is complicated by inversion artifacts, uncertainty associated with survey geometry limitations, measurement errors, and choice of regularization method. Variation of seawater over tidal cycles poses unique challenges for inversion. The capabilities and limitations of resistivity imaging are presented for characterizing the distribution of freshwater and saltwater beneath a beach. The experimental results provide new insight into fresh submarine groundwater discharge at Waquoit Bay National Estuarine Research Reserve, East Falmouth, Massachusetts (USA). Tomograms from the experimental data indicate that fresh submarine groundwater discharge may shut down at high tide, whereas temperature data indicate that the discharge continues throughout the tidal cycle. Sensitivity analysis and synthetic modeling provide insight into resolving power in the presence of a time-varying saline water layer. In general, vertical electrodes and cross-hole measurements improve the inversion results regardless of the tidal level, whereas the resolution of surface arrays is more sensitive to time-varying saline water layer.</p>","language":"English","publisher":"Springer","doi":"10.1007/s10040-009-0498-z","usgsCitation":"Henderson, R., Day-Lewis, F.D., Abarca, E., Harvey, C.F., Karam, H.N., Liu, L., and Lane, J.W., 2010, Marine electrical resistivity imaging of submarine groundwater discharge: Sensitivity analysis and application in Waquoit Bay, Massachusetts, USA: Hydrogeology Journal, v. 18, no. 1, p. 173-185, https://doi.org/10.1007/s10040-009-0498-z.","productDescription":"13 p.","startPage":"173","endPage":"185","ipdsId":"IP-011944","costCenters":[{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true},{"id":493,"text":"Office of Ground Water","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":348723,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Massachusetts","otherGeospatial":"Waquoit Bay","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -70.54252624511719,\n              41.54815851009314\n            ],\n            [\n              -70.46974182128906,\n              41.54815851009314\n            ],\n            [\n              -70.46974182128906,\n              41.672398925907906\n            ],\n            [\n              -70.54252624511719,\n              41.672398925907906\n            ],\n            [\n              -70.54252624511719,\n              41.54815851009314\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"18","issue":"1","publishingServiceCenter":{"id":11,"text":"Pembroke PSC"},"noUsgsAuthors":false,"publicationDate":"2009-09-10","publicationStatus":"PW","scienceBaseUri":"5a610acde4b06e28e9c256e5","contributors":{"authors":[{"text":"Henderson, Rory rhenders@usgs.gov","contributorId":2083,"corporation":false,"usgs":true,"family":"Henderson","given":"Rory","email":"rhenders@usgs.gov","affiliations":[{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true}],"preferred":false,"id":720313,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Day-Lewis, Frederick D. 0000-0003-3526-886X daylewis@usgs.gov","orcid":"https://orcid.org/0000-0003-3526-886X","contributorId":1672,"corporation":false,"usgs":true,"family":"Day-Lewis","given":"Frederick","email":"daylewis@usgs.gov","middleInitial":"D.","affiliations":[{"id":493,"text":"Office of Ground Water","active":true,"usgs":true},{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true}],"preferred":true,"id":720311,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Abarca, Elena","contributorId":199905,"corporation":false,"usgs":false,"family":"Abarca","given":"Elena","email":"","affiliations":[{"id":13299,"text":"Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA","active":true,"usgs":false}],"preferred":false,"id":720312,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Harvey, Charles F.","contributorId":199836,"corporation":false,"usgs":false,"family":"Harvey","given":"Charles","email":"","middleInitial":"F.","affiliations":[{"id":12444,"text":"Massachusetts Institute of Technology","active":true,"usgs":false}],"preferred":false,"id":721861,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Karam, Hanan N.","contributorId":199837,"corporation":false,"usgs":false,"family":"Karam","given":"Hanan","email":"","middleInitial":"N.","affiliations":[{"id":13299,"text":"Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA","active":true,"usgs":false}],"preferred":false,"id":721862,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Liu, Lanbo","contributorId":199850,"corporation":false,"usgs":false,"family":"Liu","given":"Lanbo","email":"","affiliations":[{"id":6619,"text":"University of Connecticutt","active":true,"usgs":false}],"preferred":false,"id":720315,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Lane, John W. Jr. jwlane@usgs.gov","contributorId":1738,"corporation":false,"usgs":true,"family":"Lane","given":"John","suffix":"Jr.","email":"jwlane@usgs.gov","middleInitial":"W.","affiliations":[{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true}],"preferred":false,"id":720314,"contributorType":{"id":1,"text":"Authors"},"rank":12}]}}
,{"id":70036482,"text":"70036482 - 2010 - Radiocarbon dating of small terrestrial gastropod shells in North America","interactions":[],"lastModifiedDate":"2012-03-12T17:22:03","indexId":"70036482","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3216,"text":"Quaternary Geochronology","active":true,"publicationSubtype":{"id":10}},"title":"Radiocarbon dating of small terrestrial gastropod shells in North America","docAbstract":"Fossil shells of small terrestrial gastropods are commonly preserved in wetland, alluvial, loess, and glacial deposits, as well as in sediments at many archeological sites. These shells are composed largely of aragonite (CaCO3) and potentially could be used for radiocarbon dating, but they must meet two criteria before their 14C ages can be considered to be reliable: (1) when gastropods are alive, the 14C activity of their shells must be in equilibrium with the 14C activity of the atmosphere, and (2) after burial, their shells must behave as closed systems with respect to carbon. To evaluate the first criterion, we conducted a comprehensive examination of the 14C content of the most common small terrestrial gastropods in North America, including 247 AMS measurements of modern shell material (3749 individual shells) from 46 different species. The modern gastropods that we analyzed were all collected from habitats on carbonate terrain and, therefore, the data presented here represent worst-case scenarios. In sum, ~78% of the shell aliquots that we analyzed did not contain dead carbon from limestone or other carbonate rocks even though it was readily available at all sites, 12% of the aliquots contained between 5 and 10% dead carbon, and a few (3% of the total) contained more than 10%. These results are significantly lower than the 20-30% dead carbon that has been reported previously for larger taxa living in carbonate terrain. For the second criterion, we report a case study from the American Midwest in which we analyzed fossil shells of small terrestrial gastropods (7 taxa; 18 AMS measurements; 173 individual shells) recovered from late-Pleistocene sediments. The fossil shells yielded 14C ages that were statistically indistinguishable from 14C ages of well-preserved plant macrofossils from the same stratum. Although just one site, these results suggest that small terrestrial gastropod shells may behave as closed systems with respect to carbon over geologic timescales. More work on this subject is needed, but if our case study site is representative of other sites, then fossil shells of some small terrestrial gastropods, including at least five common genera, Catinella, Columella, Discus, Gastrocopta, and Succinea, should yield reliable 14C ages, regardless of the local geologic substrate. ?? 2010.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Quaternary Geochronology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.quageo.2010.01.001","issn":"18711014","usgsCitation":"Pigati, J., Rech, J., and Nekola, J., 2010, Radiocarbon dating of small terrestrial gastropod shells in North America: Quaternary Geochronology, v. 5, no. 5, p. 519-532, https://doi.org/10.1016/j.quageo.2010.01.001.","startPage":"519","endPage":"532","numberOfPages":"14","costCenters":[],"links":[{"id":246289,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":218290,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.quageo.2010.01.001"}],"volume":"5","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a93e1e4b0c8380cd810a7","contributors":{"authors":[{"text":"Pigati, J.S.","contributorId":80486,"corporation":false,"usgs":true,"family":"Pigati","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":456354,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rech, J.A.","contributorId":79659,"corporation":false,"usgs":true,"family":"Rech","given":"J.A.","affiliations":[],"preferred":false,"id":456353,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nekola, J.C.","contributorId":83776,"corporation":false,"usgs":true,"family":"Nekola","given":"J.C.","affiliations":[],"preferred":false,"id":456355,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70036454,"text":"70036454 - 2010 - Extension in Mona Passage, Northeast Caribbean","interactions":[],"lastModifiedDate":"2017-11-18T10:02:37","indexId":"70036454","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3525,"text":"Tectonophysics","active":true,"publicationSubtype":{"id":10}},"title":"Extension in Mona Passage, Northeast Caribbean","docAbstract":"As shown by the recent Mw 7.0 Haiti earthquake, intra-arc deformation, which accompanies the subduction process, can present seismic and tsunami hazards to nearby islands. Spatially-limited diffuse tectonic deformation within the Northeast Caribbean Plate Boundary Zone likely led to the development of the submerged Mona Passage between Puerto Rico and the Dominican Republic. GPS geodetic data and a moderate to high level of seismicity indicate that extension within the region is ongoing. Newly-collected high-resolution multibeam bathymetry and multi-channel seismic reflection profiles and previously-collected samples are used here to determine the tectonic evolution of the Mona Passage intra-arc region. The passage is floored almost completely by Oligocene-Pliocene carbonate platform strata, which have undergone submarine and subaerial erosion. Structurally, the passage is characterized by W- to NNW-trending normal faults that offset the entire thickness of the Oligo-Pliocene carbonate platform rocks. The orientation of these faults is compatible with the NE-oriented extension vector observed in GPS data. Fault geometry best fits an oblique extension model rather than previously proposed single-phase, poly-phase, bending-moment, or rotation extension models. The intersection of these generally NW-trending faults in Mona Passage with the N-S oriented faults of Mona Canyon may reflect differing responses of the brittle upper-crust, along an arc-forearc rheological boundary, to oblique subduction along the Puerto Rico trench. Several faults within the passage, if ruptured completely, are long enough to generate earthquakes with magnitudes on the order of Mw 6.5-7. ?? 2010.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Tectonophysics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.tecto.2010.07.002","issn":"00401951","usgsCitation":"Chaytor, J., and ten Brink, U., 2010, Extension in Mona Passage, Northeast Caribbean: Tectonophysics, v. 493, no. 1-2, p. 74-92, https://doi.org/10.1016/j.tecto.2010.07.002.","startPage":"74","endPage":"92","numberOfPages":"19","ipdsId":"IP-017925","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":246380,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":218378,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.tecto.2010.07.002"}],"volume":"493","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0e42e4b0c8380cd53387","contributors":{"authors":[{"text":"Chaytor, J.D.","contributorId":80936,"corporation":false,"usgs":true,"family":"Chaytor","given":"J.D.","affiliations":[],"preferred":false,"id":456232,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"ten Brink, Uri S. 0000-0001-6858-3001 utenbrink@usgs.gov","orcid":"https://orcid.org/0000-0001-6858-3001","contributorId":127560,"corporation":false,"usgs":true,"family":"ten Brink","given":"Uri S.","email":"utenbrink@usgs.gov","affiliations":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true},{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":456233,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70034036,"text":"70034036 - 2010 - Milankovitch-scale correlations between deeply buried microbial populations and biogenic ooze lithology","interactions":[],"lastModifiedDate":"2012-03-12T17:21:48","indexId":"70034036","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Milankovitch-scale correlations between deeply buried microbial populations and biogenic ooze lithology","docAbstract":"The recent discoveries of large, active populations of microbes in the subseafloor of the world's oceans supports the impact of the deep biosphere biota on global biogeochemical cycles and raises important questions concerning the functioning of these extreme environments for life. These investigations demonstrated that subseafloor microbes are unevenly distributed and that cell abundances and metabolic activities are often independent from sediment depths, with increased prokaryotic activity at geochemical and/or sedimentary interfaces. In this study we demonstrate that microbial populations vary at the scale of individual beds in the biogenic oozes of a drill site in the eastern equatorial Pacific (Ocean Drilling Program Leg 201, Site 1226). We relate bedding-scale changes in biogenic ooze sediment composition to organic carbon (OC) and microbial cell concentrations using high-resolution color reflectance data as proxy for lithology. Our analyses demonstrate that microbial concentrations are an order of magnitude higher in the more organic-rich diatom oozes than in the nannofossil oozes. The variations mimic small-scale variations in diatom abundance and OC, indicating that the modern distribution of microbial biomass is ultimately controlled by Milankovitch-frequency variations in past oceanographic conditions. ?? 2010 Geological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/G30207.1","issn":"00917613","usgsCitation":"Aiello, I., and Bekins, B., 2010, Milankovitch-scale correlations between deeply buried microbial populations and biogenic ooze lithology: Geology, v. 38, no. 1, p. 79-82, https://doi.org/10.1130/G30207.1.","startPage":"79","endPage":"82","numberOfPages":"4","costCenters":[],"links":[{"id":216866,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/G30207.1"},{"id":244764,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"38","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a572ce4b0c8380cd6dadd","contributors":{"authors":[{"text":"Aiello, I.W.","contributorId":39993,"corporation":false,"usgs":true,"family":"Aiello","given":"I.W.","email":"","affiliations":[],"preferred":false,"id":443762,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bekins, B.A.","contributorId":98309,"corporation":false,"usgs":true,"family":"Bekins","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":443763,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70034033,"text":"70034033 - 2010 - Landscape effects on diets of two canids in Northwestern Texas: A multinomial modeling approach","interactions":[],"lastModifiedDate":"2012-03-12T17:21:43","indexId":"70034033","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2373,"text":"Journal of Mammalogy","onlineIssn":"1545-1542","printIssn":"0022-2372","active":true,"publicationSubtype":{"id":10}},"title":"Landscape effects on diets of two canids in Northwestern Texas: A multinomial modeling approach","docAbstract":"Analyses of feces, stomach contents, and regurgitated pellets are common techniques for assessing diets of vertebrates and typically contain more than 1 food item per sampling unit. When analyzed, these individual food items have traditionally been treated as independent, which represents pseudoreplication. When food types are recorded as present or absent, these samples can be treated as multinomial vectors of food items, with each vector representing 1 realization of a possible diet. We suggest such data have a similar structure to capture histories for closed-capture, capturemarkrecapture data. To assess the effects of landscapes and presence of a potential competitor, we used closed-capture models implemented in program MARK into analyze diet data generated from feces of swift foxes (Vulpes velox) and coyotes (Canis latrans) in northwestern Texas. The best models of diet contained season and location for both swift foxes and coyotes, but year accounted for less variation, suggesting that landscape type is an important predictor of diets of both species. Models containing the effect of coyote reduction were not competitive (??QAICc 53.6685), consistent with the hypothesis that presence of coyotes did not influence diet of swift foxes. Our findings suggest that landscape type may have important influences on diets of both species. We believe that multinomial models represent an effective approach to assess hypotheses when diet studies have a data structure similar to ours. ?? 2010 American Society of Mammalogists.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Mammalogy","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1644/07-MAMM-A-291R1.1","issn":"00222372","usgsCitation":"Lemons, P., Sedinger, J., Herzog, M., Gipson, P.S., and Gilliland, R., 2010, Landscape effects on diets of two canids in Northwestern Texas: A multinomial modeling approach: Journal of Mammalogy, v. 91, no. 1, p. 66-78, https://doi.org/10.1644/07-MAMM-A-291R1.1.","startPage":"66","endPage":"78","numberOfPages":"13","costCenters":[],"links":[{"id":475811,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1644/07-mamm-a-291r1.1","text":"Publisher Index Page"},{"id":244733,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216837,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1644/07-MAMM-A-291R1.1"}],"volume":"91","issue":"1","noUsgsAuthors":false,"publicationDate":"2010-02-17","publicationStatus":"PW","scienceBaseUri":"505a440ee4b0c8380cd667fa","contributors":{"authors":[{"text":"Lemons, P.R.","contributorId":22296,"corporation":false,"usgs":true,"family":"Lemons","given":"P.R.","email":"","affiliations":[],"preferred":false,"id":443752,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sedinger, J.S.","contributorId":75471,"corporation":false,"usgs":true,"family":"Sedinger","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":443755,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Herzog, M.P.","contributorId":37865,"corporation":false,"usgs":true,"family":"Herzog","given":"M.P.","email":"","affiliations":[],"preferred":false,"id":443753,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Gipson, P. S.","contributorId":70136,"corporation":false,"usgs":false,"family":"Gipson","given":"P.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":443754,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Gilliland, R.L.","contributorId":104308,"corporation":false,"usgs":true,"family":"Gilliland","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":443756,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70033977,"text":"70033977 - 2010 - Long-term variability in Northern Hemisphere snow cover and associations with warmer winters","interactions":[],"lastModifiedDate":"2012-03-12T17:21:47","indexId":"70033977","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1252,"text":"Climatic Change","active":true,"publicationSubtype":{"id":10}},"title":"Long-term variability in Northern Hemisphere snow cover and associations with warmer winters","docAbstract":"A monthly snow accumulation and melt model is used with gridded monthly temperature and precipitation data for the Northern Hemisphere to generate time series of March snow-covered area (SCA) for the period 1905 through 2002. The time series of estimated SCA for March is verified by comparison with previously published time series of SCA for the Northern Hemisphere. The time series of estimated Northern Hemisphere March SCA shows a substantial decrease since about 1970, and this decrease corresponds to an increase in mean winter Northern Hemisphere temperature. The increase in winter temperature has caused a decrease in the fraction of precipitation that occurs as snow and an increase in snowmelt for some parts of the Northern Hemisphere, particularly the mid-latitudes, thus reducing snow packs and March SCA. In addition, the increase in winter temperature and the decreases in SCA appear to be associated with a contraction of the circumpolar vortex and a poleward movement of storm tracks, resulting in decreased precipitation (and snow) in the low- to mid-latitudes and an increase in precipitation (and snow) in high latitudes. If Northern Hemisphere winter temperatures continue to warm as they have since the 1970s, then March SCA will likely continue to decrease. ?? 2009 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Climatic Change","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10584-009-9675-2","issn":"01650009","usgsCitation":"McCabe, G., and Wolock, D., 2010, Long-term variability in Northern Hemisphere snow cover and associations with warmer winters: Climatic Change, v. 99, no. 1, p. 141-153, https://doi.org/10.1007/s10584-009-9675-2.","startPage":"141","endPage":"153","numberOfPages":"13","costCenters":[],"links":[{"id":244859,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216957,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10584-009-9675-2"}],"volume":"99","issue":"1","noUsgsAuthors":false,"publicationDate":"2009-09-25","publicationStatus":"PW","scienceBaseUri":"505a49afe4b0c8380cd687f0","contributors":{"authors":[{"text":"McCabe, G.J. 0000-0002-9258-2997","orcid":"https://orcid.org/0000-0002-9258-2997","contributorId":12961,"corporation":false,"usgs":true,"family":"McCabe","given":"G.J.","affiliations":[],"preferred":false,"id":443477,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wolock, D.M. 0000-0002-6209-938X","orcid":"https://orcid.org/0000-0002-6209-938X","contributorId":36601,"corporation":false,"usgs":true,"family":"Wolock","given":"D.M.","affiliations":[],"preferred":false,"id":443478,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70036453,"text":"70036453 - 2010 - The areal extent of brown shrimp habitat suitability in Mobile Bay, Alabama, USA: Targeting vegetated habitat restoration","interactions":[],"lastModifiedDate":"2012-03-12T17:22:03","indexId":"70036453","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1552,"text":"Environmental Monitoring and Assessment","onlineIssn":"1573-2959","printIssn":"0167-6369","active":true,"publicationSubtype":{"id":10}},"title":"The areal extent of brown shrimp habitat suitability in Mobile Bay, Alabama, USA: Targeting vegetated habitat restoration","docAbstract":"The availability of wetlands and shallow water habitats significantly influences Gulf of Mexico (GOM) penaeid shrimp fishery productivity. However, the GOM region has the highest rate of wetland loss in the USA. Protection and management of these vital GOM habitats are critical to sustainable shrimp fisheries. Brown shrimp (Farfantepenaeus aztecus) are a major component of GOM fisheries. We present an approach for estimating the areal extent of suitable habitat for post-larval and juvenile brown shrimp in Mobile Bay, Alabama, using an existing habitat suitability index model for the northern GOM calculated from probabilistic survey of water quality and sediment data, land cover data, and submerged aquatic vegetation coverages. This estuarine scale approach is intended to support targeted protection and restoration of these habitats. These analyses indicate that approximately 60% of the area of Mobile Bay is categorized as suitable to near optimal for post-larval and juvenile shrimp and 38% of the area is marginally to minimally suitable. We identify potential units within Mobile Bay for targeted restoration to improve habitat suitability. ?? 2010 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Monitoring and Assessment","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10661-009-1303-0","issn":"01676369","usgsCitation":"Smith, L., Nestlerode, J., Harwell, L., and Bourgeois, P., 2010, The areal extent of brown shrimp habitat suitability in Mobile Bay, Alabama, USA: Targeting vegetated habitat restoration: Environmental Monitoring and Assessment, v. 171, no. 1-4, p. 611-620, https://doi.org/10.1007/s10661-009-1303-0.","startPage":"611","endPage":"620","numberOfPages":"10","costCenters":[],"links":[{"id":218352,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10661-009-1303-0"},{"id":246352,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"171","issue":"1-4","noUsgsAuthors":false,"publicationDate":"2010-01-16","publicationStatus":"PW","scienceBaseUri":"505ba9d1e4b08c986b322525","contributors":{"authors":[{"text":"Smith, L.M.","contributorId":82650,"corporation":false,"usgs":true,"family":"Smith","given":"L.M.","email":"","affiliations":[],"preferred":false,"id":456230,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Nestlerode, J.A.","contributorId":67738,"corporation":false,"usgs":true,"family":"Nestlerode","given":"J.A.","affiliations":[],"preferred":false,"id":456229,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Harwell, L.C.","contributorId":45162,"corporation":false,"usgs":true,"family":"Harwell","given":"L.C.","email":"","affiliations":[],"preferred":false,"id":456228,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bourgeois, P.","contributorId":94498,"corporation":false,"usgs":true,"family":"Bourgeois","given":"P.","affiliations":[],"preferred":false,"id":456231,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70033972,"text":"70033972 - 2010 - Decadal-timescale estuarine geomorphic change under future scenarios of climate and sediment supply","interactions":[],"lastModifiedDate":"2018-09-18T09:53:44","indexId":"70033972","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1584,"text":"Estuaries and Coasts","active":true,"publicationSubtype":{"id":10}},"title":"Decadal-timescale estuarine geomorphic change under future scenarios of climate and sediment supply","docAbstract":"Future estuarine geomorphic change, in response to climate change, sea-level rise, and watershed sediment supply, may govern ecological function, navigation, and water quality. We estimated geomorphic changes in Suisun Bay, CA, under four scenarios using a tidal-timescale hydrodynamic/sediment transport model. Computational expense and data needs were reduced using the morphological hydrograph concept and the morphological acceleration factor. The four scenarios included (1) present-day conditions; (2) sea-level rise and freshwater flow changes of 2030; (3) sea-level rise and decreased watershed sediment supply of 2030; and (4) sea-level rise, freshwater flow changes, and decreased watershed sediment supply of 2030. Sea-level rise increased water levels thereby reducing wave-induced bottom shear stress and sediment redistribution during the wind-wave season. Decreased watershed sediment supply reduced net deposition within the estuary, while minor changes in freshwater flow timing and magnitude induced the smallest overall effect. In all future scenarios, net deposition in the entire estuary and in the shallowest areas did not keep pace with sea-level rise, suggesting that intertidal and wetland areas may struggle to maintain elevation. Tidal-timescale simulations using future conditions were also used to infer changes in optical depth: though sea-level rise acts to decrease mean light irradiance, decreased suspended-sediment concentrations increase irradiance, yielding small changes in optical depth. The modeling results also assisted with the development of a dimensionless estuarine geomorphic number representing the ratio of potential sediment import forces to sediment export forces; we found the number to be linearly related to relative geomorphic change in Suisun Bay. The methods implemented here are widely applicable to evaluating future scenarios of estuarine change over decadal timescales. ?? The Author(s) 2009.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Estuaries and Coasts","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s12237-009-9244-y","issn":"15592723","usgsCitation":"Ganju, N., and Schoellhamer, D., 2010, Decadal-timescale estuarine geomorphic change under future scenarios of climate and sediment supply: Estuaries and Coasts, v. 33, no. 1, p. 15-29, https://doi.org/10.1007/s12237-009-9244-y.","startPage":"15","endPage":"29","numberOfPages":"15","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":475812,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1007/s12237-009-9244-y","text":"Publisher Index Page"},{"id":244760,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216862,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s12237-009-9244-y"}],"volume":"33","issue":"1","noUsgsAuthors":false,"publicationDate":"2009-12-19","publicationStatus":"PW","scienceBaseUri":"5059fe01e4b0c8380cd4ea75","contributors":{"authors":[{"text":"Ganju, N. K. 0000-0002-1096-0465","orcid":"https://orcid.org/0000-0002-1096-0465","contributorId":64782,"corporation":false,"usgs":true,"family":"Ganju","given":"N. K.","affiliations":[],"preferred":false,"id":443462,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schoellhamer, D. H. 0000-0001-9488-7340","orcid":"https://orcid.org/0000-0001-9488-7340","contributorId":85624,"corporation":false,"usgs":true,"family":"Schoellhamer","given":"D. H.","affiliations":[],"preferred":false,"id":443463,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70032578,"text":"70032578 - 2010 - Seasonal groundwater contribution to crop-water use assessed with lysimeter observations and model simulations","interactions":[],"lastModifiedDate":"2012-03-12T17:21:22","indexId":"70032578","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":"Seasonal groundwater contribution to crop-water use assessed with lysimeter observations and model simulations","docAbstract":"Groundwater evaporation can play an important role in crop-water use where the water table is shallow. Lysimeters are often used to quantify the groundwater evaporation contribution influenced by a broad range of environmental factors. However, it is difficult for such field facilities, which are operated under limited conditions within limited time, to capture the whole spectrum of capillary upflow with regard to the inter-seasonal variability of climate, especially rainfall. Therefore, in this work, the method of combining lysimeter and numerical experiments was implemented to investigate seasonal groundwater contribution to crop-water use. Groundwater evaporation experiments were conducted through a weighing lysimeter at an agricultural experiment station located within an irrigation district in the lower Yellow River Basin for two winter wheat growth seasons. A HYDRUS-1D model was first calibrated and validated with weighing lysimeter data, and then was employed to perform scenario simulations of groundwater evaporation under different depths to water table (DTW) and water input (rainfall plus irrigation) driven by long term meteorological data. The scenario simulations revealed that the seasonally averaged groundwater evaporation amount was linearly correlated to water input for different values of DTW. The linear regression could explain more than 70% of the variability. The seasonally averaged ratio of the groundwater contribution to crop-water use varied with the seasonal water input and DTW. The ratio reached as high as 75% in the case of DTW=1.0. m and no irrigation, and as low as 3% in the case of DTW=3.0. m and three irrigation applications. The results also revealed that the ratio of seasonal groundwater evaporation to potential evapotranspiration could be fitted to an exponential function of the DTW that may be applied to estimate seasonal groundwater evaporation. In this case study of multilayered soil profile, the depth at which groundwater may evaporate at potential rate was 0.60-0.65. m, and the extinction depth of groundwater evaporation was approximately 3.8. m. ?? 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.2010.06.011","issn":"00221694","usgsCitation":"Luo, Y., and Sophocleous, M., 2010, Seasonal groundwater contribution to crop-water use assessed with lysimeter observations and model simulations: Journal of Hydrology, v. 389, no. 3-4, p. 325-335, https://doi.org/10.1016/j.jhydrol.2010.06.011.","startPage":"325","endPage":"335","numberOfPages":"11","costCenters":[],"links":[{"id":213638,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jhydrol.2010.06.011"},{"id":241284,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"389","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b88aae4b08c986b316ab9","contributors":{"authors":[{"text":"Luo, Y.","contributorId":28417,"corporation":false,"usgs":true,"family":"Luo","given":"Y.","email":"","affiliations":[],"preferred":false,"id":436902,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sophocleous, M.","contributorId":13373,"corporation":false,"usgs":true,"family":"Sophocleous","given":"M.","email":"","affiliations":[],"preferred":false,"id":436901,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70036159,"text":"70036159 - 2010 - Accuracy of gap analysis habitat models in predicting physical features for wildlife-habitat associations in the southwest U.S.","interactions":[],"lastModifiedDate":"2012-03-12T17:22:06","indexId":"70036159","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1458,"text":"Ecological Modelling","active":true,"publicationSubtype":{"id":10}},"title":"Accuracy of gap analysis habitat models in predicting physical features for wildlife-habitat associations in the southwest U.S.","docAbstract":"Despite widespread and long-standing efforts to model wildlife-habitat associations using remotely sensed and other spatially explicit data, there are relatively few evaluations of the performance of variables included in predictive models relative to actual features on the landscape. As part of the National Gap Analysis Program, we specifically examined physical site features at randomly selected sample locations in the Southwestern U.S. to assess degree of concordance with predicted features used in modeling vertebrate habitat distribution. Our analysis considered hypotheses about relative accuracy with respect to 30 vertebrate species selected to represent the spectrum of habitat generalist to specialist and categorization of site by relative degree of conservation emphasis accorded to the site. Overall comparison of 19 variables observed at 382 sample sites indicated ???60% concordance for 12 variables. Directly measured or observed variables (slope, soil composition, rock outcrop) generally displayed high concordance, while variables that required judgments regarding descriptive categories (aspect, ecological system, landform) were less concordant. There were no differences detected in concordance among taxa groups, degree of specialization or generalization of selected taxa, or land conservation categorization of sample sites with respect to all sites. We found no support for the hypothesis that accuracy of habitat models is inversely related to degree of taxa specialization when model features for a habitat specialist could be more difficult to represent spatially. Likewise, we did not find support for the hypothesis that physical features will be predicted with higher accuracy on lands with greater dedication to biodiversity conservation than on other lands because of relative differences regarding available information. Accuracy generally was similar (>60%) to that observed for land cover mapping at the ecological system level. These patterns demonstrate resilience of gap analysis deductive model processes to the type of remotely sensed or interpreted data used in habitat feature predictions. ?? 2010 Elsevier B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecological Modelling","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.ecolmodel.2010.08.034","issn":"03043800","usgsCitation":"Boykin, K., Thompson, B., and Propeck-Gray, S., 2010, Accuracy of gap analysis habitat models in predicting physical features for wildlife-habitat associations in the southwest U.S.: Ecological Modelling, v. 221, no. 23, p. 2769-2775, https://doi.org/10.1016/j.ecolmodel.2010.08.034.","startPage":"2769","endPage":"2775","numberOfPages":"7","costCenters":[],"links":[{"id":246205,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":218216,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.ecolmodel.2010.08.034"}],"volume":"221","issue":"23","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e68ae4b0c8380cd474a6","contributors":{"authors":[{"text":"Boykin, K.G.","contributorId":62797,"corporation":false,"usgs":true,"family":"Boykin","given":"K.G.","email":"","affiliations":[],"preferred":false,"id":454498,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Thompson, B.C.","contributorId":102433,"corporation":false,"usgs":true,"family":"Thompson","given":"B.C.","email":"","affiliations":[],"preferred":false,"id":454499,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Propeck-Gray, S.","contributorId":24609,"corporation":false,"usgs":true,"family":"Propeck-Gray","given":"S.","email":"","affiliations":[],"preferred":false,"id":454497,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70033859,"text":"70033859 - 2010 - MTBE, TBA, and TAME attenuation in diverse hyporheic zones","interactions":[],"lastModifiedDate":"2018-10-10T09:49:38","indexId":"70033859","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"MTBE, TBA, and TAME attenuation in diverse hyporheic zones","docAbstract":"<p>Groundwater contamination by fuel-related compounds such as the fuel oxygenates methyl tert-butyl ether (MTBE), tert-butyl alcohol (TBA), and tert-amyl methyl ether (TAME) presents a significant issue to managers and consumers of groundwater and surface water that receives groundwater discharge. Four sites were investigated on Long Island, New York, characterized by groundwater contaminated with gasoline and fuel oxygenates that ultimately discharge to fresh, brackish, or saline surface water. For each site, contaminated groundwater discharge zones were delineated using pore water geochemistry data from 15 feet (4.5 m) beneath the bottom of the surface water body in the hyporheic zone and seepage-meter tests were conducted to measure discharge rates. These data when combined indicate that MTBE, TBA, and TAME concentrations in groundwater discharge in a 5-foot (1.5-m) thick section of the hyporheic zone were attenuated between 34% and 95%, in contrast to immeasurable attenuation in the shallow aquifer during contaminant transport between 0.1 and 1.5 miles (0.1 to 2.4 km). The attenuation observed in the hyporheic zone occurred primarily by physical processes such as mixing of groundwater and surface water. Biodegradation also occurred as confirmed in laboratory microcosms by the mineralization of U- <sup>14</sup>C-MTBE and U- <sup>14</sup>C-TBA to <sup>14</sup>CO<sub>2</sub> and the novel biodegradation of U- <sup>14</sup>C-TAME to <sup>14</sup>CO<sub>2</sub> under oxic and anoxic conditions. The implication of fuel oxygenate attenuation observed in diverse hyporheic zones suggests an assessment of the hyporheic zone attenuation potential (HZAP) merits inclusion as part of site assessment strategies associated with monitored or engineered attenuation.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1745-6584.2009.00608.x","issn":"0017467X","usgsCitation":"Landmeyer, J., Bradley, P.M., Trego, D., Hale, K., and Haas, J., 2010, MTBE, TBA, and TAME attenuation in diverse hyporheic zones: Ground Water, v. 48, no. 1, p. 30-41, https://doi.org/10.1111/j.1745-6584.2009.00608.x.","productDescription":"12 p.","startPage":"30","endPage":"41","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":241938,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214238,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6584.2009.00608.x"}],"volume":"48","issue":"1","noUsgsAuthors":false,"publicationDate":"2009-12-23","publicationStatus":"PW","scienceBaseUri":"505a4affe4b0c8380cd691fd","contributors":{"authors":[{"text":"Landmeyer, James 0000-0002-5640-3816 jlandmey@usgs.gov","orcid":"https://orcid.org/0000-0002-5640-3816","contributorId":3257,"corporation":false,"usgs":true,"family":"Landmeyer","given":"James","email":"jlandmey@usgs.gov","affiliations":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"preferred":true,"id":442870,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bradley, Paul M. 0000-0001-7522-8606 pbradley@usgs.gov","orcid":"https://orcid.org/0000-0001-7522-8606","contributorId":361,"corporation":false,"usgs":true,"family":"Bradley","given":"Paul","email":"pbradley@usgs.gov","middleInitial":"M.","affiliations":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"preferred":true,"id":442867,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Trego, D.A.","contributorId":66930,"corporation":false,"usgs":true,"family":"Trego","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":442869,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hale, K.G.","contributorId":40436,"corporation":false,"usgs":true,"family":"Hale","given":"K.G.","email":"","affiliations":[],"preferred":false,"id":442868,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Haas, J.E. II","contributorId":107113,"corporation":false,"usgs":true,"family":"Haas","given":"J.E.","suffix":"II","email":"","affiliations":[],"preferred":false,"id":442871,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70033831,"text":"70033831 - 2010 - Housing growth in and near United States protected areas limits their conservation value","interactions":[],"lastModifiedDate":"2012-03-12T17:21:31","indexId":"70033831","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3165,"text":"Proceedings of the National Academy of Sciences of the United States of America","active":true,"publicationSubtype":{"id":10}},"title":"Housing growth in and near United States protected areas limits their conservation value","docAbstract":"Protected areas are crucial for biodiversity conservation because they provide safe havens for species threatened by land-use change and resulting habitat loss. However, protected areas are only effective when they stop habitat loss within their boundaries, and are connected via corridors to other wild areas. The effectiveness of protected areas is threatened by development; however, the extent of this threat is unknown. We compiled spatially-detailed housing growth data from 1940 to 2030, and quantified growth for each wilderness area, national park, and national forest in the conterminous United States. Our findings show that housing development in the United States may severely limit the ability of protected areas to function as a modern \"Noah's Ark.\" Between 1940 and 2000, 28 million housing units were built within 50 km of protected areas, and 940,000 were built within national forests. Housing growth rates during the 1990s within 1 km of protected areas (20% per decade) outpaced the national average (13%). If long-term trends continue, another 17 million housing units will be built within 50 km of protected areas by 2030 (1 million within 1 km), greatly diminishing their conservation value. US protected areas are increasingly isolated, housing development in their surroundings is decreasing their effective size, and national forests are even threatened by habitat loss within their administrative boundaries. Protected areas in the United States are thus threatened similarly to those in developing countries. However, housing growth poses the main threat to protected areas in the United States whereas deforestation is the main threat in developing countries.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Proceedings of the National Academy of Sciences of the United States of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1073/pnas.0911131107","issn":"00278424","usgsCitation":"Radeloff, V.C., Stewart, S.I., Hawbaker, T., Gimmi, U., Pidgeon, A., Flather, C., Hammer, R.B., and Helmers, D., 2010, Housing growth in and near United States protected areas limits their conservation value: Proceedings of the National Academy of Sciences of the United States of America, v. 107, no. 2, p. 940-945, https://doi.org/10.1073/pnas.0911131107.","startPage":"940","endPage":"945","numberOfPages":"6","costCenters":[],"links":[{"id":487749,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://www.ncbi.nlm.nih.gov/pmc/articles/2818924","text":"External Repository"},{"id":214320,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1073/pnas.0911131107"},{"id":242037,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"107","issue":"2","noUsgsAuthors":false,"publicationDate":"2009-12-22","publicationStatus":"PW","scienceBaseUri":"505a3240e4b0c8380cd5e651","contributors":{"authors":[{"text":"Radeloff, V. C.","contributorId":58467,"corporation":false,"usgs":false,"family":"Radeloff","given":"V.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":442749,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stewart, S. I.","contributorId":99779,"corporation":false,"usgs":false,"family":"Stewart","given":"S.","email":"","middleInitial":"I.","affiliations":[],"preferred":false,"id":442754,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hawbaker, T. J.","contributorId":98118,"corporation":false,"usgs":true,"family":"Hawbaker","given":"T. J.","affiliations":[],"preferred":false,"id":442753,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Gimmi, U.","contributorId":57675,"corporation":false,"usgs":true,"family":"Gimmi","given":"U.","email":"","affiliations":[],"preferred":false,"id":442748,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Pidgeon, A.M.","contributorId":77372,"corporation":false,"usgs":true,"family":"Pidgeon","given":"A.M.","email":"","affiliations":[],"preferred":false,"id":442751,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Flather, C.H.","contributorId":73161,"corporation":false,"usgs":true,"family":"Flather","given":"C.H.","affiliations":[],"preferred":false,"id":442750,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Hammer, R. B.","contributorId":77744,"corporation":false,"usgs":false,"family":"Hammer","given":"R.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":442752,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Helmers, D.P.","contributorId":45128,"corporation":false,"usgs":true,"family":"Helmers","given":"D.P.","email":"","affiliations":[],"preferred":false,"id":442747,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70034061,"text":"70034061 - 2010 - Propagule pressure and stream characteristics influence introgression: Cutthroat and rainbow trout in British Columbia","interactions":[],"lastModifiedDate":"2012-03-12T17:21:44","indexId":"70034061","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1450,"text":"Ecological Applications","active":true,"publicationSubtype":{"id":10}},"title":"Propagule pressure and stream characteristics influence introgression: Cutthroat and rainbow trout in British Columbia","docAbstract":"Hybridization and introgression between introduced and native salmonids threaten the continued persistence of many inland cutthroat trout species. Environmental models have been developed to predict the spread of introgression, but few studies have assessed the role of propagule pressure. We used an extensive set of fish stocking records and geographic information system (GIS) data to produce a spatially explicit index of potential propagule pressure exerted by introduced rainbow trout in the Upper Kootenay River, British Columbia, Canada. We then used logistic regression and the information-theoretic approach to test the ability of a set of environmental and spatial variables to predict the level of introgression between native westslope cutthroat trout and introduced rainbow trout. Introgression was assessed using between four and seven co-dominant, diagnostic nuclear markers at 45 sites in 31 different streams. The best model for predicting introgression included our GIS propagule pressure index and an environmental variable that accounted for the biogeoclimatic zone of the site (r<sup>2</sup> = 0.62). This model was 1.4 times more likely to explain introgression than the next-best model, which consisted of only the propagule pressure index variable. We created a composite model based on the model-averaged results of the seven top models that included environmental, spatial, and propagule pressure variables. The propagule pressure index had the highest importance weight (0.995) of all variables tested and was negatively related to sites with no introgression. This study used an index of propagule pressure and demonstrated that propagule pressure had the greatest influence on the level of introgression between a native and introduced trout in a human-induced hybrid zone. ?? 2010 by the Ecological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecological Applications","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1890/08-0441.1","issn":"10510761","usgsCitation":"Bennett, S., Olson, J., Kershner, J.L., and Corbett, P., 2010, Propagule pressure and stream characteristics influence introgression: Cutthroat and rainbow trout in British Columbia: Ecological Applications, v. 20, no. 1, p. 263-277, https://doi.org/10.1890/08-0441.1.","startPage":"263","endPage":"277","numberOfPages":"15","costCenters":[],"links":[{"id":216752,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1890/08-0441.1"},{"id":244638,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"20","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a8f14e4b0c8380cd7f588","contributors":{"authors":[{"text":"Bennett, S.N.","contributorId":87784,"corporation":false,"usgs":true,"family":"Bennett","given":"S.N.","email":"","affiliations":[],"preferred":false,"id":443870,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Olson, J.R.","contributorId":98976,"corporation":false,"usgs":true,"family":"Olson","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":443871,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kershner, J. L.","contributorId":100322,"corporation":false,"usgs":true,"family":"Kershner","given":"J.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":443872,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Corbett, P.","contributorId":54434,"corporation":false,"usgs":true,"family":"Corbett","given":"P.","email":"","affiliations":[],"preferred":false,"id":443869,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70036369,"text":"70036369 - 2010 - Effects of nourishment on the form and function of an estuarine beach","interactions":[],"lastModifiedDate":"2012-03-12T17:22:02","indexId":"70036369","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1454,"text":"Ecological Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Effects of nourishment on the form and function of an estuarine beach","docAbstract":"Beach nourishment programs in estuaries can enhance shore protection, but they decrease habitat suitability by creating higher berms and wider backshores than would occur under natural conditions. Use of sediment sources from outside the area can result in sedimentary characteristics that differ from native sediments on the surface and at depth, altering conditions for both aeolian transport to dunes and interstitial fauna. Field data were gathered on an estuarine beach to determine differences in beach profile change, depth of sediment reworking, and potential for aeolian transport due to nourishment. Data were gathered over a 20-month period 6 months prior to nourishment, 3 days after nourishment, 6 months after nourishment, and 14 months after nourishment when the beach was mechanically graded to eliminate a vertical scarp in the foreshore. The nourishment consisted of 87,900m3 of sediment emplaced to create a 1.34-km-long, 30-m-wide berm 2.3m above mean tide level. Seven percent of the fill was removed from the profile within 6 months after nourishment, accompanied by 7m in horizontal retreat of the artificial berm. The fill on the backshore remained above the zone of wave influence over a winter storm season and was separated from the active foreshore by the scarp. Nourished sediments on the intertidal foreshore were significantly different from native sediments to a depth of 0.20m below the surface. A lag surface of coarse sediment formed by deflation on the backshore, resulting in a rate of aeolian transport &lt;2% of the rate on the wave-reworked foreshore.Nourishing a beach to a level higher than would be created by natural processes can create a profile that compartmentalizes and restricts transport of sediment and movement of fauna between the foreshore and backshore. Mechanical grading can eliminate the scarp, allow for faunal interaction, and reestablish wave reworking of the backshore that will facilitate aeolian transport. Using an initial design to nourish the backshore at a lower elevation and allowing a dune to provide protection against flooding during major storms could prevent a scarp from forming and eliminate the need for follow-up grading. ?? 2010 Elsevier B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecological Engineering","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.ecoleng.2010.07.016","issn":"09258574","usgsCitation":"Jackson, N., Nordstrom, K., Saini, S., and Smith, D., 2010, Effects of nourishment on the form and function of an estuarine beach: Ecological Engineering, v. 36, no. 12, p. 1709-1718, https://doi.org/10.1016/j.ecoleng.2010.07.016.","startPage":"1709","endPage":"1718","numberOfPages":"10","costCenters":[],"links":[{"id":218555,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.ecoleng.2010.07.016"},{"id":246577,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"36","issue":"12","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a076ce4b0c8380cd516be","contributors":{"authors":[{"text":"Jackson, N.L.","contributorId":104189,"corporation":false,"usgs":true,"family":"Jackson","given":"N.L.","email":"","affiliations":[],"preferred":false,"id":455762,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Nordstrom, K.F.","contributorId":17733,"corporation":false,"usgs":true,"family":"Nordstrom","given":"K.F.","email":"","affiliations":[],"preferred":false,"id":455760,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Saini, S.","contributorId":7953,"corporation":false,"usgs":true,"family":"Saini","given":"S.","email":"","affiliations":[],"preferred":false,"id":455759,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Smith, D. R. 0000-0001-6074-9257","orcid":"https://orcid.org/0000-0001-6074-9257","contributorId":44108,"corporation":false,"usgs":true,"family":"Smith","given":"D. R.","affiliations":[{"id":365,"text":"Leetown Science Center","active":true,"usgs":true}],"preferred":false,"id":455761,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70034057,"text":"70034057 - 2010 - Response of benthic macroinvertebrate communities to highway construction in an Appalachian watershed","interactions":[],"lastModifiedDate":"2012-03-12T17:21:44","indexId":"70034057","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"title":"Response of benthic macroinvertebrate communities to highway construction in an Appalachian watershed","docAbstract":"Highway construction in mountainous areas can result in sedimentation of streams, negatively impacting stream habitat, water quality, and biotic communities. We assessed the impacts of construction of a segment of Corridor H, a four-lane highway, in the Lost River watershed, West Virginia, by monitoring benthic macroinvertebrate communities and water quality, before, during, and after highway construction and prior to highway use at upstream and downstream sites from 1997 through 2007. Data analysis of temporal impacts of highway construction followed a Before-After-Control-Impact (BACI) study design. Highway construction impacts included an increase in stream sedimentation during the construction phase. This was indicated by an increase in turbidity and total suspended solids. Benthic macroinvertebrate metrics indicated a community more tolerant during and after construction than in the period before construction. The percent of Chironomidae and the Hilsenhoff Biotic Index (HBI) increased, while percent of Ephemeroptera, Plecoptera, and Trichoptera (EPT) decreased. Our 10-year study addressed short-term impacts of highway construction and found that impacts were relatively minimal. A recovery of the number of EPT taxa collected after construction indicated that the benthic macroinvertebrate community may be recovering from impacts of highway construction. However, this study only addressed a period of 3 years before, 3 years during, and 4 years post construction. Inferences cannot be made concerning the long-term impacts of the highway, highway traffic, runoff, and other factors associated with highway use. Continual monitoring of the watershed is necessary to determine if the highway has a continual impact on stream habitat, water quality, and biotic integrity. ?? 2010 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrobiologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10750-009-0070-9","issn":"00188158","usgsCitation":"Hedrick, L.B., Welsh, S., Anderson, J.T., Lin, L., Chen, Y., and Wei, X., 2010, Response of benthic macroinvertebrate communities to highway construction in an Appalachian watershed: Hydrobiologia, v. 641, no. 1, p. 115-131, https://doi.org/10.1007/s10750-009-0070-9.","startPage":"115","endPage":"131","numberOfPages":"17","costCenters":[],"links":[{"id":216687,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10750-009-0070-9"},{"id":244572,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"641","issue":"1","noUsgsAuthors":false,"publicationDate":"2010-01-12","publicationStatus":"PW","scienceBaseUri":"505aaa35e4b0c8380cd861e4","contributors":{"authors":[{"text":"Hedrick, Lara B.","contributorId":50346,"corporation":false,"usgs":true,"family":"Hedrick","given":"Lara","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":443852,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Welsh, S.A. 0000-0003-0362-054X","orcid":"https://orcid.org/0000-0003-0362-054X","contributorId":10191,"corporation":false,"usgs":true,"family":"Welsh","given":"S.A.","affiliations":[],"preferred":false,"id":443850,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Anderson, James T.","contributorId":28071,"corporation":false,"usgs":false,"family":"Anderson","given":"James","email":"","middleInitial":"T.","affiliations":[{"id":12432,"text":"West Virginia University","active":true,"usgs":false}],"preferred":false,"id":443851,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lin, L.-S.","contributorId":66093,"corporation":false,"usgs":true,"family":"Lin","given":"L.-S.","email":"","affiliations":[],"preferred":false,"id":443854,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Chen, Y.","contributorId":7019,"corporation":false,"usgs":true,"family":"Chen","given":"Y.","email":"","affiliations":[],"preferred":false,"id":443849,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Wei, X.","contributorId":50636,"corporation":false,"usgs":true,"family":"Wei","given":"X.","email":"","affiliations":[],"preferred":false,"id":443853,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70036340,"text":"70036340 - 2010 - Broad accommodation of rift-related extension recorded by dyke intrusion in Saudi Arabia","interactions":[],"lastModifiedDate":"2017-04-06T11:48:41","indexId":"70036340","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":"Broad accommodation of rift-related extension recorded by dyke intrusion in Saudi Arabia","docAbstract":"<p><span>The extensive harrat lava province of Arabia formed during the past 30 million years in response to Red Sea rifting and mantle upwelling. The area was regarded as seismically quiet, but between April and June 2009 a swarm of more than 30,000 earthquakes struck one of the lava fields in the province, Harrat Lunayyir, northwest Saudi Arabia. Concerned that larger damaging earthquakes might occur, the Saudi Arabian government evacuated 40,000 people from the region. Here we use geologic, geodetic and seismic data to show that the earthquake swarm resulted from magmatic dyke intrusion. We document a surface fault rupture that is 8</span><span class=\"mb\"><span class=\"mb\">&thinsp;</span></span><span>km long with 91</span><span class=\"mb\"><span class=\"mb\">&thinsp;</span></span><span>cm of offset. Surface deformation is best modelled by the shallow intrusion of a north-west trending dyke that is about 10</span><span class=\"mb\"><span class=\"mb\">&thinsp;</span></span><span>km long. Seismic waves generated during the earthquakes exhibit overlapping very low- and high-frequency components. We interpret the low frequencies to represent intrusion of magma and the high frequencies to represent fracturing of the crystalline basement rocks. Rather than extension being accommodated entirely by the central Red Sea rift axis, we suggest that the broad deformation observed in Harrat Lunayyir indicates that rift margins can remain as active sites of extension throughout rifting. Our analyses allowed us to forecast the likelihood of a future eruption or large earthquake in the region and informed the decisions made by the Saudi Arabian government to return the evacuees.</span></p>","language":"English","publisher":"Nature","publisherLocation":"New York, NY","doi":"10.1038/ngeo966","issn":"17520894","usgsCitation":"Pallister, J., McCausland, W., Jonsson, S., Lu, Z., Zahran, H., El, H.S., Aburukbah, A., Stewart, I., Lundgren, P., White, R., and Moufti, M., 2010, Broad accommodation of rift-related extension recorded by dyke intrusion in Saudi Arabia: Nature Geoscience, v. 3, p. 705-712, https://doi.org/10.1038/ngeo966.","productDescription":"8 p.","startPage":"705","endPage":"712","numberOfPages":"8","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":246605,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Saudi Arabia","state":"Harrat Lunayyir","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              37.5,\n              24\n            ],\n            [\n              37.5,\n              26\n            ],\n            [\n              39,\n              26\n            ],\n            [\n              39,\n              24\n            ],\n            [\n              37.5,\n              24\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"3","noUsgsAuthors":false,"publicationDate":"2010-09-26","publicationStatus":"PW","scienceBaseUri":"5059f285e4b0c8380cd4b208","contributors":{"authors":[{"text":"Pallister, J.S.","contributorId":46534,"corporation":false,"usgs":true,"family":"Pallister","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":455626,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McCausland, W.A.","contributorId":23003,"corporation":false,"usgs":true,"family":"McCausland","given":"W.A.","email":"","affiliations":[],"preferred":false,"id":455625,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Jonsson, Sigurjon","contributorId":72123,"corporation":false,"usgs":true,"family":"Jonsson","given":"Sigurjon","email":"","affiliations":[],"preferred":false,"id":455630,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lu, Z.","contributorId":106241,"corporation":false,"usgs":true,"family":"Lu","given":"Z.","affiliations":[],"preferred":false,"id":455632,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Zahran, H.M.","contributorId":69001,"corporation":false,"usgs":true,"family":"Zahran","given":"H.M.","email":"","affiliations":[],"preferred":false,"id":455629,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"El, Hadidy S.","contributorId":53215,"corporation":false,"usgs":true,"family":"El","given":"Hadidy","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":455627,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Aburukbah, A.","contributorId":54057,"corporation":false,"usgs":true,"family":"Aburukbah","given":"A.","affiliations":[],"preferred":false,"id":455628,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Stewart, I.C.F.","contributorId":18914,"corporation":false,"usgs":true,"family":"Stewart","given":"I.C.F.","email":"","affiliations":[],"preferred":false,"id":455623,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Lundgren, P.R.","contributorId":95315,"corporation":false,"usgs":true,"family":"Lundgren","given":"P.R.","email":"","affiliations":[],"preferred":false,"id":455631,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"White, R.A.","contributorId":21953,"corporation":false,"usgs":true,"family":"White","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":455624,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Moufti, M.R.H.","contributorId":12306,"corporation":false,"usgs":true,"family":"Moufti","given":"M.R.H.","affiliations":[],"preferred":false,"id":455622,"contributorType":{"id":1,"text":"Authors"},"rank":11}]}}
,{"id":70034370,"text":"70034370 - 2010 - Calibration and use of continuous heat-type automated seepage meters for submarine groundwater discharge measurements","interactions":[],"lastModifiedDate":"2012-03-12T17:21:47","indexId":"70034370","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1587,"text":"Estuarine, Coastal and Shelf Science","active":true,"publicationSubtype":{"id":10}},"title":"Calibration and use of continuous heat-type automated seepage meters for submarine groundwater discharge measurements","docAbstract":"Submarine groundwater discharge (SGD) assessments were conducted both in the laboratory and at a field site in the northeastern Gulf of Mexico, using a continuous heat-type automated seepage meter (seepmeter). The functioning of the seepmeter is based on measurements of a temperature gradient in the water between downstream and upstream positions in its flow pipe. The device has the potential of providing long-term, high-resolution measurements of SGD. Using a simple inexpensive laboratory set-up, we have shown that connecting an extension cable to the seepmeter has a negligible effect on its measuring capability. Similarly, the observed influence of very low temperature (???3 ??C) on seepmeter measurements can be accounted for by conducting calibrations at such temperatures prior to field deployments. Compared to manual volumetric measurements, calibration experiments showed that at higher water flow rates (&gt;28 cm day<sup>-1</sup> or cm<sup>3</sup> cm<sup>-2</sup> day<sup>-1</sup>) an analog flowmeter overestimated flow rates by ???7%. This was apparently due to flow resistance, turbulence and formation of air bubbles in the seepmeter water flow tubes. Salinity had no significant effect on the performance of the seepmeter. Calibration results from fresh water and sea water showed close agreement at a 95% confidence level significance between the data sets from the two media (R<sup>2</sup> = 0.98). Comparatively, the seepmeter SGD measurements provided data that are comparable to manually-operated seepage meters, the radon geochemical tracer approach, and an electromagnetic (EM) seepage meter. ?? 2009 Elsevier Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Estuarine, Coastal and Shelf Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.ecss.2009.12.001","issn":"02727714","usgsCitation":"Mwashote, B., Burnett, W.C., Chanton, J., Santos, I., Dimova, N., and Swarzenski, P., 2010, Calibration and use of continuous heat-type automated seepage meters for submarine groundwater discharge measurements: Estuarine, Coastal and Shelf Science, v. 87, no. 1, p. 1-10, https://doi.org/10.1016/j.ecss.2009.12.001.","startPage":"1","endPage":"10","numberOfPages":"10","costCenters":[],"links":[{"id":216559,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.ecss.2009.12.001"},{"id":244437,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"87","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f30fe4b0c8380cd4b59a","contributors":{"authors":[{"text":"Mwashote, B.M.","contributorId":27709,"corporation":false,"usgs":true,"family":"Mwashote","given":"B.M.","email":"","affiliations":[],"preferred":false,"id":445463,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Burnett, W. C.","contributorId":39779,"corporation":false,"usgs":false,"family":"Burnett","given":"W.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":445465,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Chanton, J.","contributorId":10641,"corporation":false,"usgs":true,"family":"Chanton","given":"J.","affiliations":[],"preferred":false,"id":445462,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Santos, I.R.","contributorId":94499,"corporation":false,"usgs":true,"family":"Santos","given":"I.R.","email":"","affiliations":[],"preferred":false,"id":445467,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Dimova, N.","contributorId":66051,"corporation":false,"usgs":true,"family":"Dimova","given":"N.","affiliations":[],"preferred":false,"id":445466,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"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":445464,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70036339,"text":"70036339 - 2010 - Effects of amphibian chytrid fungus on individual survival probability in wild boreal toads","interactions":[],"lastModifiedDate":"2017-11-17T15:44:47","indexId":"70036339","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":"Effects of amphibian chytrid fungus on individual survival probability in wild boreal toads","docAbstract":"Chytridiomycosis is linked to the worldwide decline of amphibians, yet little is known about the demographic effects of the disease. We collected capture-recapture data on three populations of boreal toads (Bufo boreas [Bufo = Anaxyrus]) in the Rocky Mountains (U.S.A.). Two of the populations were infected with chytridiomycosis and one was not. We examined the effect of the presence of amphibian chytrid fungus (Batrachochytrium dendrobatidis [Bd]; the agent of chytridiomycosis) on survival probability and population growth rate. Toads that were infected with Bd had lower average annual survival probability than uninfected individuals at sites where Bd was detected, which suggests chytridiomycosis may reduce survival by 31-42% in wild boreal toads. Toads that were negative for Bd at infected sites had survival probabilities comparable to toads at the uninfected site. Evidence that environmental covariates (particularly cold temperatures during the breeding season) influenced toad survival was weak. The number of individuals in diseased populations declined by 5-7%/year over the 6 years of the study, whereas the uninfected population had comparatively stable population growth. Our data suggest that the presence of Bd in these toad populations is not causing rapid population declines. Rather, chytridiomycosis appears to be functioning as a low-level, chronic disease whereby some infected individuals survive but the overall population effects are still negative. Our results show that some amphibian populations may be coexisting with Bd and highlight the importance of quantitative assessments of survival in diseased animal populations. Journal compilation. ?? 2010 Society for Conservation Biology. No claim to original US government works.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Conservation Biology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1523-1739.2010.01506.x","issn":"08888892","usgsCitation":"Pilliod, D., Muths, E., Scherer, R.D., Bartelt, P., Corn, P., Hossack, B., Lambert, B., Mccaffery, R., and Gaughan, C., 2010, Effects of amphibian chytrid fungus on individual survival probability in wild boreal toads: Conservation Biology, v. 24, no. 5, p. 1259-1267, https://doi.org/10.1111/j.1523-1739.2010.01506.x.","startPage":"1259","endPage":"1267","numberOfPages":"9","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":246604,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":218579,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1523-1739.2010.01506.x"}],"volume":"24","issue":"5","noUsgsAuthors":false,"publicationDate":"2010-04-20","publicationStatus":"PW","scienceBaseUri":"505a0687e4b0c8380cd512b2","contributors":{"authors":[{"text":"Pilliod, D. S.","contributorId":45259,"corporation":false,"usgs":false,"family":"Pilliod","given":"D. S.","affiliations":[],"preferred":false,"id":455618,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Muths, E.","contributorId":6394,"corporation":false,"usgs":true,"family":"Muths","given":"E.","affiliations":[],"preferred":false,"id":455613,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Scherer, R. D.","contributorId":8061,"corporation":false,"usgs":false,"family":"Scherer","given":"R.","email":"","middleInitial":"D.","affiliations":[{"id":6674,"text":"Department of Integrative Biology, University of Colorado Denver","active":true,"usgs":false}],"preferred":false,"id":455614,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bartelt, P.E.","contributorId":31948,"corporation":false,"usgs":true,"family":"Bartelt","given":"P.E.","email":"","affiliations":[],"preferred":false,"id":455616,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Corn, P.S.","contributorId":63751,"corporation":false,"usgs":true,"family":"Corn","given":"P.S.","affiliations":[],"preferred":false,"id":455620,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Hossack, B. R.","contributorId":10756,"corporation":false,"usgs":true,"family":"Hossack","given":"B. R.","affiliations":[],"preferred":false,"id":455615,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Lambert, B.A.","contributorId":58378,"corporation":false,"usgs":true,"family":"Lambert","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":455619,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Mccaffery, R.","contributorId":107139,"corporation":false,"usgs":true,"family":"Mccaffery","given":"R.","affiliations":[],"preferred":false,"id":455621,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Gaughan, C.","contributorId":42050,"corporation":false,"usgs":true,"family":"Gaughan","given":"C.","email":"","affiliations":[],"preferred":false,"id":455617,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}}
,{"id":70036274,"text":"70036274 - 2010 - Active remote sensing of snow using NMM3D/DMRT and comparison with CLPX II airborne data","interactions":[],"lastModifiedDate":"2012-03-12T17:22:03","indexId":"70036274","displayToPublicDate":"2010-01-01T00:00:00","publicationYear":"2010","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1942,"text":"IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing","active":true,"publicationSubtype":{"id":10}},"title":"Active remote sensing of snow using NMM3D/DMRT and comparison with CLPX II airborne data","docAbstract":"We applied the Numerical Maxwell Model of three-dimensional simulations (NMM3D) in the Dense Media Radiative Theory (DMRT) to calculate backscattering coefficients. The particles' positions are computer-generated and the subsequent Foldy-Lax equations solved numerically. The phase matrix in NMM3D has significant cross-polarization, particularly when the particles are densely packed. The NMM3D model is combined with DMRT in calculating the microwave scattering by dry snow. The NMM3D/DMRT equations are solved by an iterative solution up to the second order in the case of small to moderate optical thickness. The numerical results of NMM3D/DMRT are illustrated and compared with QCA/DMRT. The QCA/DMRT and NMM3D/DMRT results are also applied to compare with data from two specific datasets from the second Cold Land Processes Experiment (CLPX II) in Alaska and Colorado. The data are obtained at the Ku-band (13.95 GHz) observations using airborne imaging polarimetric scatterometer (POLSCAT). It is shown that the model predictions agree with the field measurements for both co-polarization and cross-polarization. For the Alaska region, the average snow depth and snow density are used as the inputs for DMRT. The grain size, selected from within the range of the ground measurements, is used as a best-fit parameter within the range. For the Colorado region, we use the Variable Infiltration Capacity Model (VIC) to obtain the input snow profiles for NMM3D/DMRT. ?? 2010 IEEE.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1109/JSTARS.2010.2053919","usgsCitation":"Xu, X., Liang, D., Tsang, L., Andreadis, K., Josberger, E., Lettenmaier, D., Cline, D., and Yueh, S., 2010, Active remote sensing of snow using NMM3D/DMRT and comparison with CLPX II airborne data: IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, v. 3, no. 4 PART 2, p. 689-697, https://doi.org/10.1109/JSTARS.2010.2053919.","startPage":"689","endPage":"697","numberOfPages":"9","costCenters":[],"links":[{"id":246121,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":218136,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1109/JSTARS.2010.2053919"}],"volume":"3","issue":"4 PART 2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e6ace4b0c8380cd47598","contributors":{"authors":[{"text":"Xu, X.","contributorId":55166,"corporation":false,"usgs":true,"family":"Xu","given":"X.","email":"","affiliations":[],"preferred":false,"id":455216,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Liang, D.","contributorId":66483,"corporation":false,"usgs":true,"family":"Liang","given":"D.","email":"","affiliations":[],"preferred":false,"id":455219,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Tsang, L.","contributorId":43950,"corporation":false,"usgs":true,"family":"Tsang","given":"L.","email":"","affiliations":[],"preferred":false,"id":455215,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Andreadis, K.M.","contributorId":8294,"corporation":false,"usgs":true,"family":"Andreadis","given":"K.M.","email":"","affiliations":[],"preferred":false,"id":455214,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Josberger, E.G.","contributorId":61161,"corporation":false,"usgs":true,"family":"Josberger","given":"E.G.","email":"","affiliations":[],"preferred":false,"id":455217,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Lettenmaier, D.P.","contributorId":61175,"corporation":false,"usgs":true,"family":"Lettenmaier","given":"D.P.","email":"","affiliations":[],"preferred":false,"id":455218,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Cline, D.W.","contributorId":86919,"corporation":false,"usgs":true,"family":"Cline","given":"D.W.","email":"","affiliations":[],"preferred":false,"id":455220,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Yueh, S.H.","contributorId":88990,"corporation":false,"usgs":true,"family":"Yueh","given":"S.H.","email":"","affiliations":[],"preferred":false,"id":455221,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
]}