{"pageNumber":"1626","pageRowStart":"40625","pageSize":"25","recordCount":184606,"records":[{"id":70042956,"text":"70042956 - 2012 - Carbon sequestration via reaction with basaltic rocks: geochemical modeling and experimental results","interactions":[],"lastModifiedDate":"2014-07-04T12:18:45","indexId":"70042956","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1759,"text":"Geochimica et Cosmochimica Acta","active":true,"publicationSubtype":{"id":10}},"title":"Carbon sequestration via reaction with basaltic rocks: geochemical modeling and experimental results","docAbstract":"Basaltic rocks are potential repositories for sequestering carbon dioxide (CO<sub>2</sub>) because of their capacity for trapping CO<sub>2</sub> in carbonate minerals. We carried out a series of thermodynamic equilibrium models and high pressure experiments, reacting basalt with CO<sub>2</sub>-charged fluids over a range of conditions from 50 to 200 °C at 300 bar. Results indicate basalt has a high reactivity to CO<sub>2</sub> acidified brine. Carbon dioxide is taken up from solution at all temperatures from 50 to 200 °C, 300 bar, but the maximum extent and rate of reaction occurs at 100 °C, 300 bar. Reaction path simulations utilizing the geochemical modeling program CHILLER predicted an equilibrium carbonate alteration assemblage of calcite, magnesite, and siderite, but the only secondary carbonate identified in the experiments was a ferroan magnesite. The amount of uptake at 100 °C, 300 bar ranged from 8% by weight for a typical tholeite to 26% for a picrite. The actual amount of CO2 uptake and extent of rock alteration coincides directly with the magnesium content of the rock suggesting that overall reaction extent is controlled by bulk basalt Mg content. In terms of sequestering CO<sub>2</sub>, an average basaltic MgO content of 8% is equivalent to 2.6 × 10<sup>8</sup> metric ton CO<sub>2</sub>/km<sup>3</sup> basalt.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geochimica et Cosmochimica Acta","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.gca.2012.04.042","usgsCitation":"Rosenbauer, R.J., Thomas, B., Bischoff, J.L., and Palandri, J., 2012, Carbon sequestration via reaction with basaltic rocks: geochemical modeling and experimental results: Geochimica et Cosmochimica Acta, v. 89, p. 116-133, https://doi.org/10.1016/j.gca.2012.04.042.","productDescription":"18 p.","startPage":"116","endPage":"133","numberOfPages":"18","ipdsId":"IP-026535","costCenters":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":270537,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":270536,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.gca.2012.04.042"}],"volume":"89","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"515d4f63e4b0803bd2eec51c","contributors":{"authors":[{"text":"Rosenbauer, Robert J. brosenbauer@usgs.gov","contributorId":204,"corporation":false,"usgs":true,"family":"Rosenbauer","given":"Robert","email":"brosenbauer@usgs.gov","middleInitial":"J.","affiliations":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":472663,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Thomas, Burt","contributorId":95454,"corporation":false,"usgs":true,"family":"Thomas","given":"Burt","affiliations":[],"preferred":false,"id":472666,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bischoff, James L. jbischoff@usgs.gov","contributorId":1389,"corporation":false,"usgs":true,"family":"Bischoff","given":"James","email":"jbischoff@usgs.gov","middleInitial":"L.","affiliations":[],"preferred":true,"id":472664,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Palandri, James","contributorId":61313,"corporation":false,"usgs":true,"family":"Palandri","given":"James","affiliations":[],"preferred":false,"id":472665,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70005736,"text":"70005736 - 2012 - Source rock contributions to the Lower Cretaceous heavy oil accumulations in Alberta: a basin modeling study","interactions":[],"lastModifiedDate":"2018-01-08T13:18:08","indexId":"70005736","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":701,"text":"American Association of Petroleum Geologists Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Source rock contributions to the Lower Cretaceous heavy oil accumulations in Alberta: a basin modeling study","docAbstract":"The origin of the immense oil sand deposits in Lower Cretaceous reservoirs of the Western Canada sedimentary basin is still a matter of debate, specifically with respect to the original in-place volumes and contributing source rocks. In this study, the contributions from the main source rocks were addressed using a three-dimensional petroleum system model calibrated to well data. A sensitivity analysis of source rock definition was performed in the case of the two main contributors, which are the Lower Jurassic Gordondale Member of the Fernie Group and the Upper Devonian&ndash;Lower Mississippian Exshaw Formation. This sensitivity analysis included variations of assigned total organic carbon and hydrogen index for both source intervals, and in the case of the Exshaw Formation, variations of thickness in areas beneath the Rocky Mountains were also considered. All of the modeled source rocks reached the early or main oil generation stages by 60 Ma, before the onset of the Laramide orogeny. Reconstructed oil accumulations were initially modest because of limited trapping efficiency. This was improved by defining lateral stratigraphic seals within the carrier system. An additional sealing effect by biodegraded oil may have hindered the migration of petroleum in the northern areas, but not to the east of Athabasca. In the latter case, the main trapping controls are dominantly stratigraphic and structural. Our model, based on available data, identifies the Gordondale source rock as the contributor of more than 54% of the oil in the Athabasca and Peace River accumulations, followed by minor amounts from Exshaw (15%) and other Devonian to Lower Jurassic source rocks. The proposed strong contribution of petroleum from the Exshaw Formation source rock to the Athabasca oil sands is only reproduced by assuming 25 m (82 ft) of mature Exshaw in the kitchen areas, with original total organic carbon of 9% or more.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"American Association of Petroleum Geologists Bulletin","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"American Association of Petroleum Geologists (AAPG)","publisherLocation":"Tulsa, OK","doi":"10.1306/11141111064","usgsCitation":"Berbesi, L.A., di Primio, R., Anka, Z., Horsfield, B., and Higley, D.K., 2012, Source rock contributions to the Lower Cretaceous heavy oil accumulations in Alberta: a basin modeling study: American Association of Petroleum Geologists Bulletin, v. 96, no. 7, p. 1211-1234, https://doi.org/10.1306/11141111064.","productDescription":"24 p.","startPage":"1211","endPage":"1234","numberOfPages":"41","costCenters":[{"id":164,"text":"Central Energy Resources Science Center","active":true,"usgs":true}],"links":[{"id":259393,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":259380,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1306/11141111064","linkFileType":{"id":5,"text":"html"}}],"country":"Canada","state":"Alberta","volume":"96","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b933ce4b08c986b31a3b0","contributors":{"authors":[{"text":"Berbesi, Luiyin Alejandro","contributorId":22640,"corporation":false,"usgs":true,"family":"Berbesi","given":"Luiyin","email":"","middleInitial":"Alejandro","affiliations":[],"preferred":false,"id":353141,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"di Primio, Rolando","contributorId":66133,"corporation":false,"usgs":true,"family":"di Primio","given":"Rolando","email":"","affiliations":[],"preferred":false,"id":353143,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Anka, Zahie","contributorId":23401,"corporation":false,"usgs":true,"family":"Anka","given":"Zahie","email":"","affiliations":[],"preferred":false,"id":353142,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Horsfield, Brian","contributorId":12338,"corporation":false,"usgs":true,"family":"Horsfield","given":"Brian","email":"","affiliations":[],"preferred":false,"id":353140,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Higley, Debra K. 0000-0001-8024-9954 higley@usgs.gov","orcid":"https://orcid.org/0000-0001-8024-9954","contributorId":152663,"corporation":false,"usgs":true,"family":"Higley","given":"Debra","email":"higley@usgs.gov","middleInitial":"K.","affiliations":[{"id":164,"text":"Central Energy Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":353139,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70043365,"text":"70043365 - 2012 - Predicting Impacts of Increased CO2 and Climate Change on the Water Cycle and Water Quality in the Semiarid James River Basin of the Midwestern USA","interactions":[],"lastModifiedDate":"2013-04-07T08:26:21","indexId":"70043365","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3352,"text":"Science of the Total Environment","active":true,"publicationSubtype":{"id":10}},"title":"Predicting Impacts of Increased CO2 and Climate Change on the Water Cycle and Water Quality in the Semiarid James River Basin of the Midwestern USA","docAbstract":"Emissions of greenhouse gases and aerosols from human activities continue to alter the climate and likely will have significant impacts on the terrestrial hydrological cycle and water quality, especially in arid and semiarid regions. We applied an improved Soil and Water Assessment Tool (SWAT) to evaluate impacts of increased atmospheric CO2 concentration and potential climate change on the water cycle and nitrogen loads in the semiarid James River Basin (JRB) in the Midwestern United States. We assessed responses of water yield, soil water content, groundwater recharge, and nitrate nitrogen (NO3–N) load under hypothetical climate-sensitivity scenarios in terms of CO2, precipitation, and air temperature. We extended our predictions of the dynamics of these hydrological variables into the mid-21st century with downscaled climate projections integrated across output from six General Circulation Models. Our simulation results compared against the baseline period 1980 to 2009 suggest the JRB hydrological system is highly responsive to rising levels of CO2 concentration and potential climate change. Under our scenarios, substantial decrease in precipitation and increase in air temperature by the mid-21st century could result in significant reduction in water yield, soil water content, and groundwater recharge. Our model also estimated decreased NO3–N load to streams, which could be beneficial, but a concomitant increase in NO3–N concentration due to a decrease in streamflow likely would degrade stream water and threaten aquatic ecosystems. These results highlight possible risks of drought, water supply shortage, and water quality degradation in this basin.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Science of the Total Environment","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.scitotenv.2012.04.058","usgsCitation":"Wu, Y., Liu, S., and Gallant, A.L., 2012, Predicting Impacts of Increased CO2 and Climate Change on the Water Cycle and Water Quality in the Semiarid James River Basin of the Midwestern USA: Science of the Total Environment, v. 430, p. 150-160, https://doi.org/10.1016/j.scitotenv.2012.04.058.","startPage":"150","endPage":"160","ipdsId":"IP-037398","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":270629,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":270628,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.scitotenv.2012.04.058"}],"country":"United States","volume":"430","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5162956fe4b0c25842758d07","contributors":{"authors":[{"text":"Wu, Yiping ywu@usgs.gov","contributorId":987,"corporation":false,"usgs":true,"family":"Wu","given":"Yiping","email":"ywu@usgs.gov","affiliations":[{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true}],"preferred":true,"id":473466,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Liu, Shu-Guang sliu@usgs.gov","contributorId":984,"corporation":false,"usgs":true,"family":"Liu","given":"Shu-Guang","email":"sliu@usgs.gov","affiliations":[{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true}],"preferred":false,"id":473465,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gallant, Alisa L. 0000-0002-3029-6637 gallant@usgs.gov","orcid":"https://orcid.org/0000-0002-3029-6637","contributorId":2940,"corporation":false,"usgs":true,"family":"Gallant","given":"Alisa","email":"gallant@usgs.gov","middleInitial":"L.","affiliations":[{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true},{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"preferred":true,"id":473467,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70038239,"text":"70038239 - 2012 - Transport of biologically important nutrients by wind in an eroding cold desert","interactions":[],"lastModifiedDate":"2012-11-14T15:03:20","indexId":"70038239","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":666,"text":"Aeolian Research","active":true,"publicationSubtype":{"id":10}},"title":"Transport of biologically important nutrients by wind in an eroding cold desert","docAbstract":"Wind erosion following fire is an important landscape process that can result in the redistribution of ecologically important soil resources. In this study we evaluated the potential for a fire patch in a desert shrubland to serve as a source of biologically important nutrients to the adjacent, downwind, unburned ecosystem. We analyzed nutrient concentrations (P, K, Ca, Mg, Cu, Fe, Mn, Al) in wind-transported sediments, and soils from burned and adjacent unburned surfaces, collected during the first to second growing seasons after a wildfire that burned in 2007 in Idaho, USA in sagebrush steppe; a type of cold desert shrubland. We also evaluated the timing of potential wind erosion events and weather conditions that might have contributed to nutrient availability in downwind shrubland. Findings indicated that post-fire wind erosion resulted in an important, but transient, addition of nutrients on the downwind shrubland. Aeolian sediments from the burned area were enriched relative to both the up- and down-wind soil and indicated the potential for a fertilization effect through the deposition of the nutrient-enriched sediment during the first, but not second, summer after wildfire. Weather conditions that could have produced nutrient transport events might have provided increased soil moisture necessary to make nutrients accessible for plants in the desert environment. Wind transport of nutrients following fire is likely important in the sagebrush steppe as it could contribute to pulses of resource availability that might, for example, affect plant species differently depending on their phenology, and nutrient- and water-use requirements.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Aeolian Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","publisherLocation":"Amsterdam, Netherlands","doi":"10.1016/j.aeolia.2012.01.003","usgsCitation":"Sankey, J.B., Germino, M., Benner, S.G., Glenn, N.F., and Hoover, A.N., 2012, Transport of biologically important nutrients by wind in an eroding cold desert: Aeolian Research, v. 7, p. 17-27, https://doi.org/10.1016/j.aeolia.2012.01.003.","productDescription":"11 p.","startPage":"17","endPage":"27","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":259400,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":254625,"rank":200,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.aeolia.2012.01.003","linkFileType":{"id":5,"text":"html"}}],"country":"United States","state":"Idaho","volume":"7","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb74ae4b08c986b327195","contributors":{"authors":[{"text":"Sankey, Joel B. 0000-0003-3150-4992 jsankey@usgs.gov","orcid":"https://orcid.org/0000-0003-3150-4992","contributorId":3935,"corporation":false,"usgs":true,"family":"Sankey","given":"Joel","email":"jsankey@usgs.gov","middleInitial":"B.","affiliations":[{"id":568,"text":"Southwest Biological Science Center","active":true,"usgs":true}],"preferred":true,"id":463718,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Germino, Matthew J.","contributorId":50029,"corporation":false,"usgs":true,"family":"Germino","given":"Matthew J.","affiliations":[],"preferred":false,"id":463720,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Benner, Shawn G.","contributorId":26562,"corporation":false,"usgs":true,"family":"Benner","given":"Shawn","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":463719,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Glenn, Nancy F.","contributorId":95321,"corporation":false,"usgs":true,"family":"Glenn","given":"Nancy","email":"","middleInitial":"F.","affiliations":[{"id":16201,"text":"Boise State University","active":true,"usgs":false}],"preferred":false,"id":463722,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hoover, Amber N.","contributorId":75801,"corporation":false,"usgs":true,"family":"Hoover","given":"Amber","email":"","middleInitial":"N.","affiliations":[],"preferred":false,"id":463721,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70039308,"text":"ds704 - 2012 - Benthic foraminiferal census data from Mobile Bay, Alabama--counts of surface samples and box cores","interactions":[],"lastModifiedDate":"2012-08-08T01:02:14","indexId":"ds704","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":310,"text":"Data Series","code":"DS","onlineIssn":"2327-638X","printIssn":"2327-0271","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"704","title":"Benthic foraminiferal census data from Mobile Bay, Alabama--counts of surface samples and box cores","docAbstract":"A study was undertaken in order to understand recent environmental change in Mobile Bay, Alabama. For this study a series of surface sediment and box core samples was collected. The surface benthic foraminiferal data provide the modern baseline conditions of the bay and can be used as a reference for changing paleoenvironmental parameters recorded in the box cores. The 14 sampling locations were chosen in the bay to cover the wide diversity of fluvial and marine-influenced environments on both sides of the shipping channel.","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ds704","usgsCitation":"Richwine, K.A., and Osterman, L.E., 2012, Benthic foraminiferal census data from Mobile Bay, Alabama--counts of surface samples and box cores: U.S. Geological Survey Data Series 704, HTML Document; XLS Downloads of Tables 1-12, https://doi.org/10.3133/ds704.","productDescription":"HTML Document; XLS Downloads of Tables 1-12","costCenters":[{"id":574,"text":"St. Petersburg Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":259372,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ds_704.jpg"},{"id":259354,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/ds/704/","linkFileType":{"id":5,"text":"html"}}],"country":"United States","state":"Alabama","otherGeospatial":"Mobile Bay","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f0b8e4b0c8380cd4a896","contributors":{"authors":[{"text":"Richwine, Kathryn A. krichwine@usgs.gov","contributorId":5004,"corporation":false,"usgs":true,"family":"Richwine","given":"Kathryn","email":"krichwine@usgs.gov","middleInitial":"A.","affiliations":[{"id":574,"text":"St. Petersburg Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":466014,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Osterman, Lisa E. osterman@usgs.gov","contributorId":3058,"corporation":false,"usgs":true,"family":"Osterman","given":"Lisa","email":"osterman@usgs.gov","middleInitial":"E.","affiliations":[{"id":574,"text":"St. Petersburg Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":466013,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70005218,"text":"70005218 - 2012 - Subducting plate geology in three great earthquake ruptures of the western Alaska margin, Kodiak to Unimak","interactions":[],"lastModifiedDate":"2018-01-08T12:45:03","indexId":"70005218","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1820,"text":"Geosphere","active":true,"publicationSubtype":{"id":10}},"title":"Subducting plate geology in three great earthquake ruptures of the western Alaska margin, Kodiak to Unimak","docAbstract":"Three destructive earthquakes along the Alaska subduction zone sourced transoceanic tsunamis during the past 70 years. Since it is reasoned that past rupture areas might again source tsunamis in the future, we studied potential asperities and barriers in the subduction zone by examining Quaternary Gulf of Alaska plate history, geophysical data, and morphology. We relate the aftershock areas to subducting lower plate relief and dissimilar materials in the seismogenic zone in the 1964 Kodiak and adjacent 1938 Semidi Islands earthquake segments. In the 1946 Unimak earthquake segment, the exposed lower plate seafloor lacks major relief that might organize great earthquake rupture. However, the upper plate contains a deep transverse-trending basin and basement ridges associated with the Eocene continental Alaska convergent margin transition to the Aleutian island arc. These upper plate features are sufficiently large to have affected rupture propagation. In addition, massive slope failure in the Unimak area may explain the local 42-m-high 1946 tsunami runup. Although Quaternary geologic and tectonic processes included accretion to form a frontal prism, the study of seismic images, samples, and continental slope physiography shows a previous history of tectonic erosion. Implied asperities and barriers in the seismogenic zone could organize future great earthquake rupture.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geosphere","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Geological Society of America","publisherLocation":"Boulder, CO","doi":"10.1130/GES00715.1","usgsCitation":"von Huene, R.E., Miller, J.J., and Weinrebe, W., 2012, Subducting plate geology in three great earthquake ruptures of the western Alaska margin, Kodiak to Unimak: Geosphere, v. 8, no. 3, p. 628-644, https://doi.org/10.1130/GES00715.1.","productDescription":"17 p.","startPage":"628","endPage":"644","numberOfPages":"19","costCenters":[{"id":164,"text":"Central Energy Resources Science Center","active":true,"usgs":true}],"links":[{"id":474386,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1130/ges00715.1","text":"Publisher Index Page"},{"id":259396,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":259381,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/GES00715.1","linkFileType":{"id":5,"text":"html"}}],"country":"United States","state":"Alaska","volume":"8","issue":"3","noUsgsAuthors":false,"publicationDate":"2012-04-19","publicationStatus":"PW","scienceBaseUri":"505b9d0de4b08c986b31d5fc","contributors":{"authors":[{"text":"von Huene, Roland E. 0000-0003-1301-3866 rvonhuene@usgs.gov","orcid":"https://orcid.org/0000-0003-1301-3866","contributorId":191070,"corporation":false,"usgs":true,"family":"von Huene","given":"Roland","email":"rvonhuene@usgs.gov","middleInitial":"E.","affiliations":[{"id":7065,"text":"USGS emeritus","active":true,"usgs":false},{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":false,"id":352082,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Miller, John J. 0000-0002-9098-0967 jmiller@usgs.gov","orcid":"https://orcid.org/0000-0002-9098-0967","contributorId":3785,"corporation":false,"usgs":true,"family":"Miller","given":"John","email":"jmiller@usgs.gov","middleInitial":"J.","affiliations":[{"id":164,"text":"Central Energy Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":352081,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Weinrebe, Wilhelm","contributorId":47227,"corporation":false,"usgs":true,"family":"Weinrebe","given":"Wilhelm","email":"","affiliations":[],"preferred":false,"id":352083,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70039372,"text":"70039372 - 2012 - Estimating abundance of mountain lions from unstructured spatial sampling","interactions":[],"lastModifiedDate":"2023-10-12T19:58:05.240313","indexId":"70039372","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Estimating abundance of mountain lions from unstructured spatial sampling","docAbstract":"Mountain lions (Puma concolor) are often difficult to monitor because of their low capture probabilities, extensive movements, and large territories. Methods for estimating the abundance of this species are needed to assess population status, determine harvest levels, evaluate the impacts of management actions on populations, and derive conservation and management strategies. Traditional mark&ndash;recapture methods do not explicitly account for differences in individual capture probabilities due to the spatial distribution of individuals in relation to survey effort (or trap locations). However, recent advances in the analysis of capture&ndash;recapture data have produced methods estimating abundance and density of animals from spatially explicit capture&ndash;recapture data that account for heterogeneity in capture probabilities due to the spatial organization of individuals and traps. We adapt recently developed spatial capture&ndash;recapture models to estimate density and abundance of mountain lions in western Montana. Volunteers and state agency personnel collected mountain lion DNA samples in portions of the Blackfoot drainage (7,908 km<sup>2</sup>) in west-central Montana using 2 methods: snow back-tracking mountain lion tracks to collect hair samples and biopsy darting treed mountain lions to obtain tissue samples. Overall, we recorded 72 individual capture events, including captures both with and without tissue sample collection and hair samples resulting in the identification of 50 individual mountain lions (30 females, 19 males, and 1 unknown sex individual). We estimated lion densities from 8 models containing effects of distance, sex, and survey effort on detection probability. Our population density estimates ranged from a minimum of 3.7 mountain lions/100 km<sup>2</sup> (95% Cl 2.3&ndash;5.7) under the distance only model (including only an effect of distance on detection probability) to 6.7 (95% Cl 3.1&ndash;11.0) under the full model (including effects of distance, sex, survey effort, and distance x sex on detection probability). These numbers translate to a total estimate of 293 mountain lions (95% Cl 182&ndash;451) to 529 (95% Cl 245&ndash;870) within the Blackfoot drainage. Results from the distance model are similar to previous estimates of 3.6 mountain lions/100 km<sup>2</sup> for the study area; however, results from all other models indicated greater numbers of mountain lions. Our results indicate that unstructured spatial sampling combined with spatial capture&ndash;recapture analysis can be an effective method for estimating large carnivore densities.","language":"English","publisher":"Wiley","publisherLocation":"Hoboken, NJ","usgsCitation":"Russell, R.E., Royle, J., Desimone, R., Schwartz, M.K., Edwards, V.L., Pilgrim, K.P., and Mckelvey, K.S., 2012, Estimating abundance of mountain lions from unstructured spatial sampling: Journal of Wildlife Management, v. 76, no. 8, p. 1551-1561.","productDescription":"11 p.","startPage":"1551","endPage":"1561","numberOfPages":"11","ipdsId":"IP-029409","costCenters":[{"id":456,"text":"National Wildlife Health Center","active":true,"usgs":true},{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":259377,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"76","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0b08e4b0c8380cd52520","contributors":{"authors":[{"text":"Russell, Robin E. 0000-0001-8726-7303 rerussell@usgs.gov","orcid":"https://orcid.org/0000-0001-8726-7303","contributorId":3998,"corporation":false,"usgs":true,"family":"Russell","given":"Robin","email":"rerussell@usgs.gov","middleInitial":"E.","affiliations":[{"id":456,"text":"National Wildlife Health Center","active":true,"usgs":true}],"preferred":true,"id":466149,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Royle, J. Andrew 0000-0003-3135-2167","orcid":"https://orcid.org/0000-0003-3135-2167","contributorId":80808,"corporation":false,"usgs":true,"family":"Royle","given":"J. Andrew","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":true,"id":466153,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Desimone, Richard","contributorId":33964,"corporation":false,"usgs":false,"family":"Desimone","given":"Richard","email":"","affiliations":[],"preferred":false,"id":466152,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Schwartz, Michael K.","contributorId":102326,"corporation":false,"usgs":true,"family":"Schwartz","given":"Michael","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":466155,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Edwards, Victoria L.","contributorId":90149,"corporation":false,"usgs":true,"family":"Edwards","given":"Victoria","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":466154,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Pilgrim, Kristy P.","contributorId":18615,"corporation":false,"usgs":true,"family":"Pilgrim","given":"Kristy","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":466150,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Mckelvey, Kevin S.","contributorId":22617,"corporation":false,"usgs":true,"family":"Mckelvey","given":"Kevin","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":466151,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70004459,"text":"70004459 - 2012 - The early bird gets the shrimp: Confronting assumptions of isotopic equilibrium and homogeneity in a wild bird population","interactions":[],"lastModifiedDate":"2012-11-02T16:14:13","indexId":"70004459","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2158,"text":"Journal of Animal Ecology","active":true,"publicationSubtype":{"id":10}},"title":"The early bird gets the shrimp: Confronting assumptions of isotopic equilibrium and homogeneity in a wild bird population","docAbstract":"1. Because stable isotope distributions in organic material vary systematically across energy gradients that exist in ecosystems, community and population structures, and in individual physiological systems, isotope values in animal tissues have helped address a broad range of questions in animal ecology. It follows that every tissue sample provides an isotopic profile that can be used to study dietary or movement histories of individual animals. Interpretations of these profiles depend on the assumption that metabolic pools are isotopically well mixed and in equilibrium with dietary resources prior to tissue synthesis, and they extend to the population level by assuming isotope profiles are identically distributed for animals using the same proximal dietary resource. As these assumptions are never fully met, studying structure in the variance of tissue isotope values from wild populations is informative. 2. We studied variation in &delta;<sup>13</sup>C, &delta;<sup>15</sup>N, &delta;<sup>2</sup>H and &delta;<sup>18</sup>O data for feathers from a population of eared grebes (Podiceps nigricollis) that migrate to Great Salt Lake each fall to moult feathers. During this time, they cannot fly and feed almost exclusively on superabundant brine shrimp (Artemia franciscana). The ecological simplicity of this situation minimized the usual spatial and trophic complexities often present in natural studies of feather isotope values. 3. Ranges and variances of isotope values for the feathers were larger than those from previously published studies that report feather isotopic variance, but they were bimodally distributed in all isotope dimensions. Isotope values for proximal dietary resources and local surface water show that some of the feathers we assumed to have been grown locally must have been grown before birds reached isotopic equilibrium with local diet or immediately prior to arrival at Great Salt Lake. 4. Our study provides novel insights about resource use strategies in eared grebes during migration. More generally, it demonstrates the utility of studying variance structures and questioning assumptions implicit in the interpretation of stable isotope data from wild animals.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Animal Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Wiley","publisherLocation":"Hoboken, NJ","usgsCitation":"Wunder, M.B., Jehl, J.R., and Stricker, C.A., 2012, The early bird gets the shrimp: Confronting assumptions of isotopic equilibrium and homogeneity in a wild bird population: Journal of Animal Ecology, v. 81, no. 6, p. 1223-1232.","productDescription":"10 p.","startPage":"1223","endPage":"1232","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":259397,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Utah","otherGeospatial":"Great Salt Lake","volume":"81","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505baaefe4b08c986b322ae7","contributors":{"authors":[{"text":"Wunder, Michael B.","contributorId":88594,"corporation":false,"usgs":true,"family":"Wunder","given":"Michael","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":350464,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jehl, Joseph R. Jr.","contributorId":6309,"corporation":false,"usgs":true,"family":"Jehl","given":"Joseph","suffix":"Jr.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":350463,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Stricker, Craig A. 0000-0002-5031-9437 cstricker@usgs.gov","orcid":"https://orcid.org/0000-0002-5031-9437","contributorId":1097,"corporation":false,"usgs":true,"family":"Stricker","given":"Craig","email":"cstricker@usgs.gov","middleInitial":"A.","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":350462,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70039299,"text":"70039299 - 2012 - Searching for evidence of hydrothermal activity at Apollinaris Mons, Mars","interactions":[],"lastModifiedDate":"2024-04-19T21:58:55.728249","indexId":"70039299","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1963,"text":"Icarus","active":true,"publicationSubtype":{"id":10}},"title":"Searching for evidence of hydrothermal activity at Apollinaris Mons, Mars","docAbstract":"<p id=\"sp010\">A multidisciplinary approach involving various remote sensing instruments is used to investigate Apollinaris Mons, a prominent volcano on Mars, as well as the surrounding plains for signs of prolonged hydrologic and volcanic, and possibly hydrothermal activity. The main findings include (1) evidence from laser altimetry indicating the large thickness (1.5–2&nbsp;km at some locations) of the fan deposits draping the southern flank contrary to previous estimates, coupled with possible layering which point to a significant emplacement phase at Apollinaris Mons, (2) corroboration of Robinson et al. (Robinson, M.S., Mouginis-Mark, P.J., Zimbelman, J.R., Wu, S.S.C., Ablin, K.K., Howington-Kraus, A.E. [1993]. Icarus 104, 301–323) hypothesis regarding the formation of incised valleys on the western flanks by density current erosion which would indicate magma–water interaction or, alternatively, volatile-rich magmas early in the volcano’s history, (3) mounds of diverse geometric shapes, many of which display summit depressions and occur among faults and fractures, possibly marking venting, (4) strong indicators on the flanks of the volcano for lahar events, and possibly, a caldera lake, (5) ubiquitous presence of impact craters displaying fluidized ejecta in both shield-forming (flank and caldera) materials and materials that surround the volcano that are indicative of water-rich target materials at the time of impact, (6) long-term complex association in time among shield-forming materials and Medusae Fossae Formation.</p><p id=\"sp015\">The findings point to a site of extensive volcanic and hydrologic activity with possibly a period of magma–water interaction and hydrothermal activity. Finally, we propose that the mound structures around Apollinaris should be prime targets for further in situ exploration and search for possible exobiological signatures.</p>","language":"English","publisher":"Elsevier","publisherLocation":"Amsterdam, Netherlands","doi":"10.1016/j.icarus.2011.10.022","usgsCitation":"El Maarry, M.R., Dohm, J.M., Marzo, G.A., Fergason, R., Goetz, W., Heggy, E., Pack, A., and Markiewicz, W.J., 2012, Searching for evidence of hydrothermal activity at Apollinaris Mons, Mars: Icarus, v. 217, no. 1, p. 297-314, https://doi.org/10.1016/j.icarus.2011.10.022.","productDescription":"18 p.","startPage":"297","endPage":"314","numberOfPages":"18","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":259368,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"Apollinaris Mons, Mars","volume":"217","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8854e4b08c986b316900","contributors":{"authors":[{"text":"El Maarry, M. Ramy","contributorId":97367,"corporation":false,"usgs":true,"family":"El Maarry","given":"M.","email":"","middleInitial":"Ramy","affiliations":[],"preferred":false,"id":466001,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dohm, James M.","contributorId":83610,"corporation":false,"usgs":true,"family":"Dohm","given":"James","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":465999,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Marzo, Giuseppe A.","contributorId":28851,"corporation":false,"usgs":true,"family":"Marzo","given":"Giuseppe","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":465996,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Fergason, Robin","contributorId":67767,"corporation":false,"usgs":true,"family":"Fergason","given":"Robin","affiliations":[],"preferred":false,"id":465997,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Goetz, Walter","contributorId":74128,"corporation":false,"usgs":true,"family":"Goetz","given":"Walter","email":"","affiliations":[],"preferred":false,"id":465998,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Heggy, Essam","contributorId":96947,"corporation":false,"usgs":true,"family":"Heggy","given":"Essam","email":"","affiliations":[],"preferred":false,"id":466000,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Pack, Andreas","contributorId":100676,"corporation":false,"usgs":true,"family":"Pack","given":"Andreas","email":"","affiliations":[],"preferred":false,"id":466002,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Markiewicz, Wojciech J.","contributorId":13852,"corporation":false,"usgs":true,"family":"Markiewicz","given":"Wojciech","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":465995,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70038501,"text":"70038501 - 2012 - The paradox of cooling streams in a warming world: Regional climate trends do not parallel variable local trends in stream temperature in the Pacific continental United States","interactions":[],"lastModifiedDate":"2017-11-24T17:20:57","indexId":"70038501","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1807,"text":"Geophysical Research Letters","active":true,"publicationSubtype":{"id":10}},"title":"The paradox of cooling streams in a warming world: Regional climate trends do not parallel variable local trends in stream temperature in the Pacific continental United States","docAbstract":"Temperature is a fundamentally important driver of ecosystem processes in streams. Recent warming of terrestrial climates around the globe has motivated concern about consequent increases in stream temperature. More specifically, observed trends of increasing air temperature and declining stream flow are widely believed to result in corresponding increases in stream temperature. Here, we examined the evidence for this using long-term stream temperature data from minimally and highly human-impacted sites located across the Pacific continental United States. Based on hypothesized climate impacts, we predicted that we should find warming trends in the maximum, mean and minimum temperatures, as well as increasing variability over time. These predictions were not fully realized. Warming trends were most prevalent in a small subset of locations with longer time series beginning in the 1950s. More recent series of observations (1987-2009) exhibited fewer warming trends and more cooling trends in both minimally and highly human-influenced systems. Trends in variability were much less evident, regardless of the length of time series. Based on these findings, we conclude that our perspective of climate impacts on stream temperatures is clouded considerably by a lack of long-termdata on minimally impacted streams, and biased spatio-temporal representation of existing time series. Overall our results highlight the need to develop more mechanistic, process-based understanding of linkages between climate change, other human impacts and stream temperature, and to deploy sensor networks that will provide better information on trends in stream temperatures in the future.","language":"English","publisher":"American Geophysical Union","publisherLocation":"Washington, D.C.","doi":"10.1029/2012GL051448","usgsCitation":"Arismendi, I., Johnson, S., Dunham, J., Haggerty, R., and Hockman-Wert, D., 2012, The paradox of cooling streams in a warming world: Regional climate trends do not parallel variable local trends in stream temperature in the Pacific continental United States: Geophysical Research Letters, v. 39, 7 p.; L10401, https://doi.org/10.1029/2012GL051448.","productDescription":"7 p.; L10401","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":474388,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2012gl051448","text":"Publisher Index Page"},{"id":259404,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","volume":"39","noUsgsAuthors":false,"publicationDate":"2012-05-16","publicationStatus":"PW","scienceBaseUri":"505bae7be4b08c986b32411f","contributors":{"authors":[{"text":"Arismendi, Ivan","contributorId":70661,"corporation":false,"usgs":true,"family":"Arismendi","given":"Ivan","affiliations":[],"preferred":false,"id":464432,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Johnson, Sherri","contributorId":102348,"corporation":false,"usgs":true,"family":"Johnson","given":"Sherri","affiliations":[{"id":7134,"text":"USFS","active":true,"usgs":false}],"preferred":false,"id":464433,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Dunham, Jason B. 0000-0002-6268-0633 jdunham@usgs.gov","orcid":"https://orcid.org/0000-0002-6268-0633","contributorId":1808,"corporation":false,"usgs":true,"family":"Dunham","given":"Jason B.","email":"jdunham@usgs.gov","affiliations":[{"id":289,"text":"Forest and Rangeland Ecosys Science Center","active":true,"usgs":true}],"preferred":false,"id":464430,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Haggerty, Roy","contributorId":102631,"corporation":false,"usgs":true,"family":"Haggerty","given":"Roy","affiliations":[],"preferred":false,"id":464434,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hockman-Wert, David 0000-0003-2436-6237 dhockman-wert@usgs.gov","orcid":"https://orcid.org/0000-0003-2436-6237","contributorId":3891,"corporation":false,"usgs":true,"family":"Hockman-Wert","given":"David","email":"dhockman-wert@usgs.gov","affiliations":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true},{"id":289,"text":"Forest and Rangeland Ecosys Science Center","active":true,"usgs":true}],"preferred":true,"id":464431,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70193583,"text":"70193583 - 2012 - Early retreat of the Alaska Peninsula Glacier Complex and the implications for coastal migrations of First Americans","interactions":[],"lastModifiedDate":"2017-11-02T14:36:10","indexId":"70193583","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3219,"text":"Quaternary Science Reviews","active":true,"publicationSubtype":{"id":10}},"title":"Early retreat of the Alaska Peninsula Glacier Complex and the implications for coastal migrations of First Americans","docAbstract":"<p><span>The debate over a coastal migration route for the First Americans revolves around two major points: seafaring technology, and a viable landscape and resource base. Three lake cores from Sanak Island in the western Gulf of Alaska yield the first radiocarbon ages from the continental shelf of the Northeast Pacific and record deglaciation nearly 17</span><span>&nbsp;</span><span>ka BP (thousands of calendar years ago), much earlier than previous estimates based on extrapolated data from other sites outside the coastal corridor in the Gulf of Alaska. Pollen data suggest an arid, terrestrial ecosystem by 16.3</span><span>&nbsp;</span><span>ka BP. Therefore glaciers would not have hindered the movement of humans along the southern edge of the Bering Land Bridge for two millennia before the first well-recognized “New World” archaeological sites were inhabited.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.quascirev.2012.05.014","usgsCitation":"Misarti, N., Finney, B., Jordan, J.W., Maschner, H.D., Addison, J.A., Shapley, M.D., Krumhardt, A.P., and Beget, J.E., 2012, Early retreat of the Alaska Peninsula Glacier Complex and the implications for coastal migrations of First Americans: Quaternary Science Reviews, v. 48, p. 1-6, https://doi.org/10.1016/j.quascirev.2012.05.014.","productDescription":"6 p.","startPage":"1","endPage":"6","ipdsId":"IP-038195","costCenters":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"links":[{"id":348107,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","volume":"48","publishingServiceCenter":{"id":14,"text":"Menlo Park PSC"},"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"59fc2eb0e4b0531197b2800e","contributors":{"authors":[{"text":"Misarti, Nicole","contributorId":199570,"corporation":false,"usgs":false,"family":"Misarti","given":"Nicole","email":"","affiliations":[],"preferred":false,"id":719866,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Finney, Bruce P.","contributorId":88074,"corporation":false,"usgs":true,"family":"Finney","given":"Bruce P.","affiliations":[],"preferred":false,"id":719867,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Jordan, James W.","contributorId":199733,"corporation":false,"usgs":false,"family":"Jordan","given":"James","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":719868,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Maschner, Herbert D. G.","contributorId":199567,"corporation":false,"usgs":false,"family":"Maschner","given":"Herbert","email":"","middleInitial":"D. G.","affiliations":[],"preferred":false,"id":719869,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Addison, Jason A. 0000-0003-2416-9743 jaddison@usgs.gov","orcid":"https://orcid.org/0000-0003-2416-9743","contributorId":4192,"corporation":false,"usgs":true,"family":"Addison","given":"Jason","email":"jaddison@usgs.gov","middleInitial":"A.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":719870,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Shapley, Mark D.","contributorId":74974,"corporation":false,"usgs":true,"family":"Shapley","given":"Mark","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":719871,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Krumhardt, Andrea P.","contributorId":71946,"corporation":false,"usgs":true,"family":"Krumhardt","given":"Andrea","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":719872,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Beget, James E.","contributorId":22757,"corporation":false,"usgs":true,"family":"Beget","given":"James","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":719873,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70003665,"text":"70003665 - 2012 - The influence of external subsidies on diet, growth and Hg concentrations of freshwater sport fish: implications for management and fish consumption advisories","interactions":[],"lastModifiedDate":"2012-09-05T17:16:16","indexId":"70003665","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1479,"text":"Ecotoxicology","active":true,"publicationSubtype":{"id":10}},"title":"The influence of external subsidies on diet, growth and Hg concentrations of freshwater sport fish: implications for management and fish consumption advisories","docAbstract":"Mercury (Hg) contamination in sport fish is a global problem. In freshwater systems, food web structure, sport fish sex, size, diet and growth rates influence Hg bioaccumulation. Fish stocking is a common management practice worldwide that can introduce external energy and contaminants into freshwater systems. Thus, stocking can alter many of the factors that influence Hg concentrations in sport fish. Here we evaluated the influence of external subsidies, in the form of hatchery-raised rainbow trout Oncorhynchus mykiss on walleye Sander vitreus diet, growth and Hg concentrations in two freshwater systems. Stocking differentially influenced male and female walleye diets and growth, producing a counterintuitive size-contamination relationship. Modeling indicated that walleye growth rate and diet were important explanatory variables when predicting Hg concentrations. Thus, hatchery contributions to freshwater systems in the form of energy and contaminants can influence diet, growth and Hg concentrations in sport fish. Given the extensive scale of fish stocking, and the known health risks associated with Hg contamination, this represents a significant issue for managers monitoring and manipulating freshwater food web structures, and policy makers attempting to develop fish consumption advisories to protect human health in stocked systems.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecotoxicology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Springer","publisherLocation":"Amsterdam, Netherlands","doi":"10.1007/s10646-012-0921-4","usgsCitation":"Lepak, J., Hooten, M., and Johnson, B., 2012, The influence of external subsidies on diet, growth and Hg concentrations of freshwater sport fish: implications for management and fish consumption advisories: Ecotoxicology, v. 21, no. 7, p. 1878-1888, https://doi.org/10.1007/s10646-012-0921-4.","productDescription":"11 p.","startPage":"1878","endPage":"1888","costCenters":[{"id":189,"text":"Colorado Cooperative Fish and Wildlife Research Unit","active":false,"usgs":true}],"links":[{"id":259391,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":259384,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10646-012-0921-4","linkFileType":{"id":5,"text":"html"}}],"volume":"21","issue":"7","noUsgsAuthors":false,"publicationDate":"2012-06-15","publicationStatus":"PW","scienceBaseUri":"505bad1ee4b08c986b3239b4","contributors":{"authors":[{"text":"Lepak, J.M.","contributorId":106332,"corporation":false,"usgs":true,"family":"Lepak","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":348241,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hooten, M.B.","contributorId":50261,"corporation":false,"usgs":true,"family":"Hooten","given":"M.B.","email":"","affiliations":[],"preferred":false,"id":348239,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Johnson, B. M.","contributorId":71511,"corporation":false,"usgs":false,"family":"Johnson","given":"B. M.","affiliations":[],"preferred":false,"id":348240,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70039309,"text":"70039309 - 2012 - Volatilization of polycyclic aromatic hydrocarbons from coal-tar-sealed pavement","interactions":[],"lastModifiedDate":"2013-03-17T16:51:36","indexId":"70039309","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1226,"text":"Chemosphere","active":true,"publicationSubtype":{"id":10}},"title":"Volatilization of polycyclic aromatic hydrocarbons from coal-tar-sealed pavement","docAbstract":"Coal-tar-based pavement sealants, a major source of PAHs to urban water bodies, are a potential source of volatile PAHs to the atmosphere. An initial assessment of volatilization of PAHs from coal-tar-sealed pavement is presented here in which we measured summertime gas-phase PAH concentrations 0.03 m and 1.28 m above the pavement surface of seven sealed (six with coal-tar-based sealant and one with asphalt-based sealant) and three unsealed (two asphalt and one concrete) parking lots in central Texas. PAHs also were measured in parking lot dust. The geometric mean concentration of the sum of eight frequently detected PAHs (&Sigma;PAH<sub>8</sub>) in the 0.03-m samples above sealed lots (1320 ng m<sup>-3</sup>) during the hottest part of the day was 20 times greater than that above unsealed lots (66.5 ng m<sup>-3</sup>). The geometric mean concentration in the 1.28-m samples above sealed lots (138 ng m<sup>-3</sup>) was five times greater than above unsealed lots (26.0 ng m<sup>-3</sup>). Estimated PAH flux from the sealed lots was 60 times greater than that from unsealed lots (geometric means of 88 and 1.4 &mu;g m<sup>-2</sup> h<sup>-1</sup>, respectively). Although the data set presented here is small, the much higher estimated fluxes from sealed pavement than from unsealed pavement indicate that coal-tar-based sealants are emitting PAHs to urban air at high rates compared to other paved surfaces.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Chemosphere","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","publisherLocation":"Amsterdam, Netherlands","doi":"10.1016/j.chemosphere.2011.12.072","usgsCitation":"Van Metre, P., Majewski, M.S., Mahler, B., Foreman, W., Braun, C.L., Wilson, J.T., and Burbank, T.L., 2012, Volatilization of polycyclic aromatic hydrocarbons from coal-tar-sealed pavement: Chemosphere, v. 88, no. 1, p. 1-7, https://doi.org/10.1016/j.chemosphere.2011.12.072.","productDescription":"7 p.","startPage":"1","endPage":"7","numberOfPages":"7","costCenters":[{"id":583,"text":"Texas Water Science Center","active":true,"usgs":true}],"links":[{"id":259395,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":259378,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.chemosphere.2011.12.072","linkFileType":{"id":5,"text":"html"}}],"volume":"88","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc2cfe4b08c986b32ada0","contributors":{"authors":[{"text":"Van Metre, Peter C.","contributorId":34104,"corporation":false,"usgs":true,"family":"Van Metre","given":"Peter C.","affiliations":[],"preferred":false,"id":466021,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Majewski, Michael S. majewski@usgs.gov","contributorId":440,"corporation":false,"usgs":true,"family":"Majewski","given":"Michael","email":"majewski@usgs.gov","middleInitial":"S.","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":true,"id":466015,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mahler, Barbara 0000-0002-9150-9552 bjmahler@usgs.gov","orcid":"https://orcid.org/0000-0002-9150-9552","contributorId":1249,"corporation":false,"usgs":true,"family":"Mahler","given":"Barbara","email":"bjmahler@usgs.gov","affiliations":[{"id":583,"text":"Texas Water Science Center","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true}],"preferred":true,"id":466017,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Foreman, William T. wforeman@usgs.gov","contributorId":1473,"corporation":false,"usgs":true,"family":"Foreman","given":"William T.","email":"wforeman@usgs.gov","affiliations":[{"id":452,"text":"National Water Quality Laboratory","active":true,"usgs":true}],"preferred":false,"id":466018,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Braun, Christopher L. 0000-0002-5540-2854 clbraun@usgs.gov","orcid":"https://orcid.org/0000-0002-5540-2854","contributorId":925,"corporation":false,"usgs":true,"family":"Braun","given":"Christopher","email":"clbraun@usgs.gov","middleInitial":"L.","affiliations":[{"id":48595,"text":"Oklahoma-Texas Water Science Center","active":true,"usgs":true}],"preferred":true,"id":466016,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Wilson, Jennifer T. 0000-0003-4481-6354 jenwilso@usgs.gov","orcid":"https://orcid.org/0000-0003-4481-6354","contributorId":1782,"corporation":false,"usgs":true,"family":"Wilson","given":"Jennifer","email":"jenwilso@usgs.gov","middleInitial":"T.","affiliations":[{"id":583,"text":"Texas Water Science Center","active":true,"usgs":true}],"preferred":true,"id":466019,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Burbank, Teresa L. tburbank@usgs.gov","contributorId":2048,"corporation":false,"usgs":true,"family":"Burbank","given":"Teresa","email":"tburbank@usgs.gov","middleInitial":"L.","affiliations":[],"preferred":true,"id":466020,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70039314,"text":"70039314 - 2012 - Population dynamics of Hawaiian seabird colonies vulnerable to sea-level rise","interactions":[],"lastModifiedDate":"2016-10-19T14:00:37","indexId":"70039314","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","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":"Population dynamics of Hawaiian seabird colonies vulnerable to sea-level rise","docAbstract":"Globally, seabirds are vulnerable to anthropogenic threats both at sea and on land. Seabirds typically nest colonially and show strong fidelity to natal colonies, and such colonies on low-lying islands may be threatened by sea-level rise. We used French Frigate Shoals, the largest atoll in the Hawaiian Archipelago, as a case study to explore the population dynamics of seabird colonies and the potential effects sea-level rise may have on these rookeries. We compiled historic observations, a 30-year time series of seabird population abundance, lidar-derived elevations, and aerial imagery of all the islands of French Frigate Shoals. To estimate the population dynamics of 8 species of breeding seabirds on Tern Island from 1980 to 2009, we used a Gompertz model with a Bayesian approach to infer population growth rates, density dependence, process variation, and observation error. All species increased in abundance, in a pattern that provided evidence of density dependence. Great Frigatebirds (Fregata minor), Masked Boobies (Sula dactylatra), Red-tailed Tropicbirds (Phaethon rubricauda), Spectacled Terns (Onychoprion lunatus), and White Terns (Gygis alba) are likely at carrying capacity. Density dependence may exacerbate the effects of sea-level rise on seabirds because populations near carrying capacity on an island will be more negatively affected than populations with room for growth. We projected 12% of French Frigate Shoals will be inundated if sea level rises 1 m and 28% if sea level rises 2 m. Spectacled Terns and shrub-nesting species are especially vulnerable to sea-level rise, but seawalls and habitat restoration may mitigate the effects of sea-level rise. Losses of seabird nesting habitat may be substantial in the Hawaiian Islands by 2100 if sea levels rise 2 m. Restoration of higher-elevation seabird colonies represent a more enduring conservation solution for Pacific seabirds.","language":"English","publisher":"Society for Conservation Biology","publisherLocation":"Washington, D.C.","doi":"10.1111/j.1523-1739.2012.01853.x","usgsCitation":"Hatfield, J.S., Reynolds, M.H., Seavy, N., and Krause, C.M., 2012, Population dynamics of Hawaiian seabird colonies vulnerable to sea-level rise: Conservation Biology, v. 26, no. 4, p. 667-678, https://doi.org/10.1111/j.1523-1739.2012.01853.x.","productDescription":"12 p.","startPage":"667","endPage":"678","numberOfPages":"12","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":259367,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":259358,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1523-1739.2012.01853.x","linkFileType":{"id":5,"text":"html"}}],"country":"United States","state":"Hawai'i","volume":"26","issue":"4","noUsgsAuthors":false,"publicationDate":"2012-05-24","publicationStatus":"PW","scienceBaseUri":"505a7d48e4b0c8380cd79e63","contributors":{"authors":[{"text":"Hatfield, Jeff S.","contributorId":95187,"corporation":false,"usgs":true,"family":"Hatfield","given":"Jeff","email":"","middleInitial":"S.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":false,"id":466034,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Reynolds, Michelle H. 0000-0001-7253-8158 mreynolds@usgs.gov","orcid":"https://orcid.org/0000-0001-7253-8158","contributorId":3871,"corporation":false,"usgs":true,"family":"Reynolds","given":"Michelle","email":"mreynolds@usgs.gov","middleInitial":"H.","affiliations":[{"id":521,"text":"Pacific Island Ecosystems Research Center","active":false,"usgs":true},{"id":5049,"text":"Pacific Islands Ecosys Research Center","active":true,"usgs":true}],"preferred":true,"id":466032,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Seavy, Nathaniel E.","contributorId":19829,"corporation":false,"usgs":true,"family":"Seavy","given":"Nathaniel E.","affiliations":[],"preferred":false,"id":466033,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Krause, Crystal M.","contributorId":101919,"corporation":false,"usgs":true,"family":"Krause","given":"Crystal","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":466035,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70039337,"text":"70039337 - 2012 - Variation in migratory behavior influences regional genetic diversity and structure among American kestrel populations (Falco sparverius) in North America","interactions":[],"lastModifiedDate":"2012-08-02T01:01:49","indexId":"70039337","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2333,"text":"Journal of Heredity","active":true,"publicationSubtype":{"id":10}},"title":"Variation in migratory behavior influences regional genetic diversity and structure among American kestrel populations (Falco sparverius) in North America","docAbstract":"Birds employ numerous strategies to cope with seasonal fluctuations in high-quality habitat availability. Long distance migration is a common tactic; however, partial migration is especially common among broadly distributed species. Under partial migration systems, a portion of a species migrates, whereas the remainder inhabits breeding grounds year round. In this study, we identified effects of migratory behavior variation on genetic structure and diversity of American Kestrels (Falco sparverius), a widespread partial migrant in North America. American Kestrels generally migrate; however, a resident group inhabits the southeastern United States year round. The southeastern group is designated as a separate subspecies (F. s. paulus) from the migratory group (F. s. sparverius). Using mitochondrial DNA and microsatellites from 183 and 211 individuals, respectively, we illustrate that genetic structure is stronger among nonmigratory populations, with differentiation measures ranging from 0.060 to 0.189 depending on genetic marker and analysis approach. In contrast, measures from western North American populations ranged from 0 to 0.032. These findings suggest that seasonal migratory behavior is also associated with natal and breeding dispersal tendencies. We likewise detected significantly lower genetic diversity within nonmigratory populations, reflecting the greater influence of genetic drift in small populations. We identified the signal of population expansion among nonmigratory populations, consistent with the recent establishment of higher latitude breeding locations following Pleistocene glacial retreat. Differentiation of F. s. paulus and F. s. sparverius reflected subtle differences in allele frequencies. Because migratory behavior can evolve quickly, our analyses suggest recent origins of migratory American Kestrel populations in North America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Heredity","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Oxford Journals","publisherLocation":"Oxford, U.K.","doi":"10.1093/jhered/ess024","usgsCitation":"Miller, M.P., Mullins, T., Parrish, J.G., Walters, J., and Haig, S.M., 2012, Variation in migratory behavior influences regional genetic diversity and structure among American kestrel populations (Falco sparverius) in North America: Journal of Heredity, v. 103, no. 4, p. 503-514, https://doi.org/10.1093/jhered/ess024.","productDescription":"12 p.","startPage":"503","endPage":"514","numberOfPages":"12","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":474390,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1093/jhered/ess024","text":"Publisher Index Page"},{"id":259374,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":259364,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1093/jhered/ess024","linkFileType":{"id":5,"text":"html"}}],"otherGeospatial":"North America","volume":"103","issue":"4","noUsgsAuthors":false,"publicationDate":"2012-05-04","publicationStatus":"PW","scienceBaseUri":"505bc15de4b08c986b32a539","contributors":{"authors":[{"text":"Miller, Mark P. 0000-0003-1045-1772 mpmiller@usgs.gov","orcid":"https://orcid.org/0000-0003-1045-1772","contributorId":1967,"corporation":false,"usgs":true,"family":"Miller","given":"Mark","email":"mpmiller@usgs.gov","middleInitial":"P.","affiliations":[{"id":38131,"text":"WMA - Office of Planning and Programming","active":true,"usgs":true}],"preferred":true,"id":466092,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mullins, Thomas D.","contributorId":12819,"corporation":false,"usgs":true,"family":"Mullins","given":"Thomas D.","affiliations":[],"preferred":false,"id":466094,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Parrish, John G.","contributorId":6312,"corporation":false,"usgs":true,"family":"Parrish","given":"John","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":466093,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Walters, Jeffrey R.","contributorId":27997,"corporation":false,"usgs":true,"family":"Walters","given":"Jeffrey R.","affiliations":[],"preferred":false,"id":466095,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Haig, Susan M. 0000-0002-6616-7589 susan_haig@usgs.gov","orcid":"https://orcid.org/0000-0002-6616-7589","contributorId":719,"corporation":false,"usgs":true,"family":"Haig","given":"Susan","email":"susan_haig@usgs.gov","middleInitial":"M.","affiliations":[{"id":289,"text":"Forest and Rangeland Ecosys Science Center","active":true,"usgs":true},{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"preferred":true,"id":466091,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70039359,"text":"70039359 - 2012 - Relative value of managed wetlands and tidal marshlands for wintering northern pintails","interactions":[],"lastModifiedDate":"2017-10-30T12:26:36","indexId":"70039359","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2287,"text":"Journal of Fish and Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Relative value of managed wetlands and tidal marshlands for wintering northern pintails","docAbstract":"Northern pintail Anas acuta (hereafter, pintail) populations have declined substantially throughout the western US since the 1970s, largely as a result of converting wetlands to cropland. Managed wetlands have been developed throughout the San Francisco Bay estuaries to provide wildlife habitat, particularly for waterfowl. Many of these areas were historically tidal baylands and plans are underway to remove dikes and restore tidal action. The relationship between tidal baylands and waterfowl populations is poorly understood. Our objective was to provide information on selection and avoidance of managed and tidal marshland by pintails. During 1991&ndash;1993 and 1998&ndash;2000, we radio-marked and relocated 330 female pintails (relocations, <i>n</i> =11,574) at Suisun Marsh, the largest brackish water estuary within San Francisco Bay, to estimate resource selection functions during the nonbreeding months (winter). Using a distance-based modeling approach, we calculated selection functions for different ecological communities (e.g., tidal baylands) and investigated variation explained by time of day (day or night hours) to account for differences in pintail behavior (i.e., foraging vs. roosting). We found strong evidence for selection of managed wetlands. Pintails also avoided tidal marshes and bays and channels. We did not detect differences in selection function between day and night hours for managed wetlands but the degree of avoidance of other habitats varied by time of day. We also found that areas subjected to tidal action did not influence the selection of immediately adjacent managed wetlands. If current management goals include providing habitat for wintering waterfowl populations, particularly pintail, then we recommend wildlife managers focus tidal restoration on areas that are not currently managed wetland and/or improve conditions in areas of managed wetlands to increase local carrying capacities","language":"English","publisher":"U.S. Fish and Wildlife Service","publisherLocation":"Arlington, VA","doi":"10.3996/102011-JFWM-062","usgsCitation":"Coates, P.S., Casazza, M.L., Halstead, B., and Fleskes, J.P., 2012, Relative value of managed wetlands and tidal marshlands for wintering northern pintails: Journal of Fish and Wildlife Management, v. 3, no. 1, p. 98-109, https://doi.org/10.3996/102011-JFWM-062.","productDescription":"12 p.","startPage":"98","endPage":"109","numberOfPages":"12","costCenters":[{"id":552,"text":"San Francisco Bay-Delta","active":false,"usgs":true},{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"links":[{"id":474393,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3996/102011-jfwm-062","text":"Publisher Index Page"},{"id":259376,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"San Francisco Bay","volume":"3","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aa69ee4b0c8380cd84f60","contributors":{"authors":[{"text":"Coates, Peter S. 0000-0003-2672-9994 pcoates@usgs.gov","orcid":"https://orcid.org/0000-0003-2672-9994","contributorId":3263,"corporation":false,"usgs":true,"family":"Coates","given":"Peter","email":"pcoates@usgs.gov","middleInitial":"S.","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":466138,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Casazza, Michael L. 0000-0002-5636-735X mike_casazza@usgs.gov","orcid":"https://orcid.org/0000-0002-5636-735X","contributorId":2091,"corporation":false,"usgs":true,"family":"Casazza","given":"Michael","email":"mike_casazza@usgs.gov","middleInitial":"L.","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":466136,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Halstead, Brian J. 0000-0002-5535-6528 bhalstead@usgs.gov","orcid":"https://orcid.org/0000-0002-5535-6528","contributorId":3051,"corporation":false,"usgs":true,"family":"Halstead","given":"Brian J.","email":"bhalstead@usgs.gov","affiliations":[{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true},{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":466137,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Fleskes, Joseph P. 0000-0001-5388-6675 joe_fleskes@usgs.gov","orcid":"https://orcid.org/0000-0001-5388-6675","contributorId":1889,"corporation":false,"usgs":true,"family":"Fleskes","given":"Joseph","email":"joe_fleskes@usgs.gov","middleInitial":"P.","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":false,"id":466135,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70039311,"text":"70039311 - 2012 - Leptophis santamartensis (Serpentes, Colubridae), a junior synonym of Leptophis ahaetulla occidentalis","interactions":[],"lastModifiedDate":"2012-08-02T01:01:49","indexId":"70039311","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2334,"text":"Journal of Herpetology","active":true,"publicationSubtype":{"id":10}},"title":"Leptophis santamartensis (Serpentes, Colubridae), a junior synonym of Leptophis ahaetulla occidentalis","docAbstract":"Leptophis santamartensis, known only from Sierra Nevada de Santa Marta, Colombia, is one of the more poorly known species of the genus Leptophis. The characters used for its diagnosis largely overlap with those of other Leptophis, mainly with Leptophis ahaetulla occidentalis, the only other Leptophis known to occur in the Sierra Nevada de Santa Marta. A detailed comparison of L. a. occidentalis with the two known specimens of L. santamartensis leads to the conclusion that the latter should be relegated to the synonymy of the former.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Herpetology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Society for the Study of Amphibians and Reptiles","publisherLocation":"http://ssarherps.org/","doi":"10.1670/10-263","usgsCitation":"Albuquerque, N.R., de Passos, P., and Gotte, S.W., 2012, Leptophis santamartensis (Serpentes, Colubridae), a junior synonym of Leptophis ahaetulla occidentalis: Journal of Herpetology, v. 46, no. 2, p. 248-252, https://doi.org/10.1670/10-263.","productDescription":"5 p.","startPage":"248","endPage":"252","numberOfPages":"5","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":259366,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":259352,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1670/10-263","linkFileType":{"id":5,"text":"html"}}],"country":"Colombia","volume":"46","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4646e4b0c8380cd675f8","contributors":{"authors":[{"text":"Albuquerque, Nelson R.","contributorId":38409,"corporation":false,"usgs":true,"family":"Albuquerque","given":"Nelson","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":466023,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"de Passos, Paulo","contributorId":75800,"corporation":false,"usgs":true,"family":"de Passos","given":"Paulo","email":"","affiliations":[],"preferred":false,"id":466024,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gotte, Steve W. 0000-0001-5509-4495 sgotte@usgs.gov","orcid":"https://orcid.org/0000-0001-5509-4495","contributorId":4481,"corporation":false,"usgs":true,"family":"Gotte","given":"Steve","email":"sgotte@usgs.gov","middleInitial":"W.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":true,"id":466022,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70039307,"text":"70039307 - 2012 - Perils of categorical thinking: \"Oxic/anoxic\" conceptual model in environmental remediation","interactions":[],"lastModifiedDate":"2018-02-23T15:43:47","indexId":"70039307","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3249,"text":"Remediation Journal","active":true,"publicationSubtype":{"id":10}},"title":"Perils of categorical thinking: \"Oxic/anoxic\" conceptual model in environmental remediation","docAbstract":"Given ambient atmospheric oxygen concentrations of about 21 percent (by volume), the lower limit for reliable quantitation of dissolved oxygen concentrations in groundwater samples is in the range of 0.1&ndash;0.5 mg/L. Frameworks for assessing in situ redox condition are often applied using a simple two-category (oxic/anoxic) model of oxygen condition. The \"oxic\" category defines the environmental range in which dissolved oxygen concentrations are clearly expected to impact contaminant biodegradation, either by supporting aerobic biodegradation of electron-donor contaminants like petroleum hydrocarbons or by inhibiting anaerobic biodegradation of electron-acceptor contaminants like chloroethenes. The tendency to label the second category \"anoxic\" leads to an invalid assumption that oxygen is insignificant when, in fact, the dissolved oxygen concentration is less than detection but otherwise unknown. Expressing dissolved oxygen concentrations as numbers of molecules per volume, dissolved oxygen concentrations that fall below the 0.1 mg/L field detection limit range from 1 to 1017 molecules/L. In light of recent demonstrations of substantial oxygen-linked biodegradation of chloroethene contaminants at dissolved oxygen concentrations well below the 0.1&ndash;0.5 mg/L field detection limit, characterizing \"less than detection\" oxygen concentrations as \"insignificant\" is invalid.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Remediation","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Wiley Periodicals, Inc.","publisherLocation":"Hoboken, NJ","doi":"10.1002/rem.21317","usgsCitation":"Bradley, P.M., 2012, Perils of categorical thinking: \"Oxic/anoxic\" conceptual model in environmental remediation: Remediation Journal, v. 22, no. 3, p. 9-18, https://doi.org/10.1002/rem.21317.","productDescription":"10 p.","startPage":"9","endPage":"18","numberOfPages":"10","costCenters":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"links":[{"id":259371,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":259357,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/rem.21317","linkFileType":{"id":5,"text":"html"}}],"volume":"22","issue":"3","noUsgsAuthors":false,"publicationDate":"2012-06-07","publicationStatus":"PW","scienceBaseUri":"505a7694e4b0c8380cd781c7","contributors":{"authors":[{"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":466012,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70039312,"text":"70039312 - 2012 - Evidence, models, conservation programs and limits to management","interactions":[],"lastModifiedDate":"2012-08-02T01:01:49","indexId":"70039312","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":774,"text":"Animal Conservation","active":true,"publicationSubtype":{"id":10}},"title":"Evidence, models, conservation programs and limits to management","docAbstract":"Walsh et al. (2012) emphasized the importance of obtaining evidence to assess the effects of management actions on state variables relevant to objectives of conservation programs. They focused on malleefowl Leipoa ocellata, ground-dwelling Australian megapodes listed as vulnerable. They noted that although fox Vulpes vulpes baiting is the main management action used in malleefowl conservation throughout southern Australia, evidence of the effectiveness of this action is limited and currently debated. Walsh et al. (2012) then used data from 64 sites monitored for malleefowl and foxes over 23 years to assess key functional relationships relevant to fox control as a conservation action for malleefowl. In one set of analyses, Walsh et al. (2012) focused on two relationships: fox baiting investment versus fox presence, and fox presence versus malleefowl population size and rate of population change. Results led to the counterintuitive conclusion that increases in investments in fox control produced slight decreases in malleefowl population size and growth. In a second set of analyses, Walsh et al. (2012) directly assessed the relationship between investment in fox baiting and malleefowl population size and rate of population change. This set of analyses showed no significant relationship between investment in fox population control and malleefowl population growth. Both sets of analyses benefited from the incorporation of key environmental covariates hypothesized to influence these management relationships. Walsh et al. (2012) concluded that \"in most situations, malleefowl conservation did not effectively benefit from fox baiting at current levels of investment.\" In this commentary, I discuss the work of Walsh et al. (2012) using the conceptual framework of structured decision making (SDM). In doing so, I accept their analytic results and associated conclusions as accurate and discuss basic ideas about evidence, conservation and limits to management.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Animal Conservation","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Wiley","publisherLocation":"Hoboken, NJ","doi":"10.1111/j.1469-1795.2012.00574.x","usgsCitation":"Nichols, J., 2012, Evidence, models, conservation programs and limits to management: Animal Conservation, v. 15, no. 4, p. 331-333, https://doi.org/10.1111/j.1469-1795.2012.00574.x.","productDescription":"3 p.","startPage":"331","endPage":"333","numberOfPages":"3","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":474387,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1469-1795.2012.00574.x","text":"Publisher Index Page"},{"id":259351,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":259340,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1469-1795.2012.00574.x","linkFileType":{"id":5,"text":"html"}}],"volume":"15","issue":"4","noUsgsAuthors":false,"publicationDate":"2012-07-04","publicationStatus":"PW","scienceBaseUri":"505a0d74e4b0c8380cd53021","contributors":{"authors":[{"text":"Nichols, J.D. 0000-0002-7631-2890","orcid":"https://orcid.org/0000-0002-7631-2890","contributorId":14332,"corporation":false,"usgs":true,"family":"Nichols","given":"J.D.","affiliations":[],"preferred":false,"id":466025,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70039354,"text":"70039354 - 2012 - Assessment of environments for Mars Science Laboratory entry, descent, and surface operations","interactions":[],"lastModifiedDate":"2017-01-11T16:51:47","indexId":"70039354","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3454,"text":"Space Science Reviews","active":true,"publicationSubtype":{"id":10}},"title":"Assessment of environments for Mars Science Laboratory entry, descent, and surface operations","docAbstract":"The Mars Science Laboratory mission aims to land a car-sized rover on Mars' surface and operate it for at least one Mars year in order to assess whether its field area was ever capable of supporting microbial life. Here we describe the approach used to identify, characterize, and assess environmental risks to the landing and rover surface operations. Novel entry, descent, and landing approaches will be used to accurately deliver the 900-kg rover, including the ability to sense and \"fly out\" deviations from a best-estimate atmospheric state. A joint engineering and science team developed methods to estimate the range of potential atmospheric states at the time of arrival and to quantitatively assess the spacecraft's performance and risk given its particular sensitivities to atmospheric conditions. Numerical models are used to calculate the atmospheric parameters, with observations used to define model cases, tune model parameters, and validate results. This joint program has resulted in a spacecraft capable of accessing, with minimal risk, the four finalist sites chosen for their scientific merit. The capability to operate the landed rover over the latitude range of candidate landing sites, and for all seasons, was verified against an analysis of surface environmental conditions described here. These results, from orbital and model data sets, also drive engineering simulations of the rover's thermal state that are used to plan surface operations.","language":"English","publisher":"Springer","publisherLocation":"Amsterdam, Netherlands","doi":"10.1007/s11214-012-9911-3","usgsCitation":"Vasavada, A., Chen, A., Barnes, J.R., Burkhart, P.D., Cantor, B.A., Dwyer-Cianciolo, A.M., Fergason, R.L., Hinson, D.P., Justh, H.L., Kass, D.M., Lewis, S.R., Mischna, M.A., Murphy, J.R., Rafkin, S.C., Tyler, D., and Withers, P.G., 2012, Assessment of environments for Mars Science Laboratory entry, descent, and surface operations: Space Science Reviews, v. 170, no. 1, p. 793-835, https://doi.org/10.1007/s11214-012-9911-3.","productDescription":"43 p.","startPage":"793","endPage":"835","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":259348,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"170","issue":"1","noUsgsAuthors":false,"publicationDate":"2012-06-30","publicationStatus":"PW","scienceBaseUri":"5059ee2ee4b0c8380cd49be8","contributors":{"authors":[{"text":"Vasavada, Ashwin R.","contributorId":84125,"corporation":false,"usgs":true,"family":"Vasavada","given":"Ashwin R.","affiliations":[],"preferred":false,"id":466132,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chen, Allen","contributorId":71430,"corporation":false,"usgs":true,"family":"Chen","given":"Allen","email":"","affiliations":[],"preferred":false,"id":466131,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Barnes, Jeffrey R.","contributorId":21813,"corporation":false,"usgs":true,"family":"Barnes","given":"Jeffrey","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":466121,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Burkhart, P. Daniel","contributorId":21023,"corporation":false,"usgs":true,"family":"Burkhart","given":"P.","email":"","middleInitial":"Daniel","affiliations":[],"preferred":false,"id":466119,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Cantor, Bruce A.","contributorId":38829,"corporation":false,"usgs":true,"family":"Cantor","given":"Bruce","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":466125,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Dwyer-Cianciolo, Alicia M.","contributorId":33569,"corporation":false,"usgs":true,"family":"Dwyer-Cianciolo","given":"Alicia","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":466123,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Fergason, Robini L.","contributorId":50394,"corporation":false,"usgs":true,"family":"Fergason","given":"Robini","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":466129,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Hinson, David P.","contributorId":21400,"corporation":false,"usgs":true,"family":"Hinson","given":"David","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":466120,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Justh, Hilary L.","contributorId":41275,"corporation":false,"usgs":true,"family":"Justh","given":"Hilary","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":466126,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Kass, David M.","contributorId":91731,"corporation":false,"usgs":true,"family":"Kass","given":"David","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":466133,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Lewis, Stephen R.","contributorId":64081,"corporation":false,"usgs":true,"family":"Lewis","given":"Stephen","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":466130,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Mischna, Michael A.","contributorId":46815,"corporation":false,"usgs":true,"family":"Mischna","given":"Michael","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":466127,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Murphy, James R.","contributorId":96944,"corporation":false,"usgs":true,"family":"Murphy","given":"James","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":466134,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Rafkin, Scot C.R.","contributorId":31614,"corporation":false,"usgs":true,"family":"Rafkin","given":"Scot","email":"","middleInitial":"C.R.","affiliations":[],"preferred":false,"id":466122,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Tyler, Daniel","contributorId":35999,"corporation":false,"usgs":true,"family":"Tyler","given":"Daniel","email":"","affiliations":[],"preferred":false,"id":466124,"contributorType":{"id":1,"text":"Authors"},"rank":15},{"text":"Withers, Paul G.","contributorId":49226,"corporation":false,"usgs":true,"family":"Withers","given":"Paul","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":466128,"contributorType":{"id":1,"text":"Authors"},"rank":16}]}}
,{"id":70038495,"text":"70038495 - 2012 - Surface properties of the Mars Science Laboratory candidate landing sites: characterization from orbit and predictions","interactions":[],"lastModifiedDate":"2012-09-21T17:16:41","indexId":"70038495","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3454,"text":"Space Science Reviews","active":true,"publicationSubtype":{"id":10}},"title":"Surface properties of the Mars Science Laboratory candidate landing sites: characterization from orbit and predictions","docAbstract":"This work describes the interpretation of THEMIS-derived thermal inertia data at the Eberswalde, Gale, Holden, and Mawrth Vallis Mars Science Laboratory (MSL) candidate landing sites and determines how thermophysical variations correspond to morphology and, when apparent, mineralogical diversity. At Eberswalde, the proportion of likely unconsolidated material relative to exposed bedrock or highly indurated surfaces controls the thermal inertia of a given region. At Gale, the majority of the landing site region has a moderate thermal inertia (250 to 410 J m<sup>-2</sup> K<sup>-1</sup> s<sup>-1/2</sup>), which is likely an indurated surface mixed with unconsolidated materials. The primary difference between higher and moderate thermal inertia surfaces may be due to the amount of mantling material present. Within the mound of stratified material in Gale, layers are distinguished in the thermal inertia data; the MSL rover could be traversing through materials that are both thermophysically and compositionally diverse. The majority of the Holden ellipse has a thermal inertia of 340 to 475 J m<sup>-2</sup> K<sup>-1</sup> s<sup>-1/2</sup> and consists of bed forms with some consolidated material intermixed. Mawrth Vallis has a mean thermal inertia of 310 J m<sup>-2</sup> K<sup>-1</sup> s<sup>-1/2</sup> and a wide variety of materials is present contributing to the moderate thermal inertia surfaces, including a mixture of bedrock, indurated surfaces, bed forms, and unconsolidated fines. Phyllosilicates have been identified at all four candidate landing sites, and these clay-bearing units typically have a similar thermal inertia value (400 to 500 J m<sup>-2</sup> K<sup>-1</sup> s<sup>-1/2</sup>), suggesting physical properties that are also similar.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Space Science Reviews","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Springer","publisherLocation":"Amsterdam, Netherlands","doi":"10.1007/s11214-012-9891-3","usgsCitation":"Fergason, R., Christensen, P.R., Golombek, M., and Parker, T.J., 2012, Surface properties of the Mars Science Laboratory candidate landing sites: characterization from orbit and predictions: Space Science Reviews, v. 170, no. 1-4, p. 739-773, https://doi.org/10.1007/s11214-012-9891-3.","productDescription":"35 p.","startPage":"739","endPage":"773","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":259403,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":257911,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s11214-012-9891-3","linkFileType":{"id":5,"text":"html"}}],"otherGeospatial":"Mars","volume":"170","issue":"1-4","noUsgsAuthors":false,"publicationDate":"2012-05-26","publicationStatus":"PW","scienceBaseUri":"505b9fbae4b08c986b31e7d2","contributors":{"authors":[{"text":"Fergason, R.L.","contributorId":13786,"corporation":false,"usgs":true,"family":"Fergason","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":464410,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Christensen, P. R.","contributorId":7819,"corporation":false,"usgs":false,"family":"Christensen","given":"P.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":464409,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Golombek, M.P.","contributorId":52696,"corporation":false,"usgs":true,"family":"Golombek","given":"M.P.","email":"","affiliations":[],"preferred":false,"id":464412,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Parker, T. J.","contributorId":30776,"corporation":false,"usgs":false,"family":"Parker","given":"T.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":464411,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70039346,"text":"70039346 - 2012 - Threshold amounts of organic carbon needed to initiate reductive dechlorination in groundwater systems","interactions":[],"lastModifiedDate":"2018-02-23T15:43:33","indexId":"70039346","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3249,"text":"Remediation Journal","active":true,"publicationSubtype":{"id":10}},"title":"Threshold amounts of organic carbon needed to initiate reductive dechlorination in groundwater systems","docAbstract":"Aquifer sediment and groundwater chemistry data from 15 Department of Defense facilities located throughout the United States were collected and analyzed with the goal of estimating the amount of natural organic carbon needed to initiate reductive dechlorination in groundwater systems. Aquifer sediments were analyzed for hydroxylamine and NaOH-extractable organic carbon, yielding a probable underestimate of potentially bioavailable organic carbon (PBOC). Aquifer sediments were also analyzed for total organic carbon (TOC) using an elemental combustion analyzer, yielding a probable overestimate of bioavailable carbon. Concentrations of PBOC correlated linearly with TOC with a slope near one. However, concentrations of PBOC were consistently five to ten times lower than TOC. When mean concentrations of dissolved oxygen observed at each site were plotted versus PBOC, it showed that anoxic conditions were initiated at approximately 200 mg/kg of PBOC. Similarly, the accumulation of reductive dechlorination daughter products relative to parent compounds increased at a PBOC concentration of approximately 200 mg/kg. Concentrations of total hydrolysable amino acids (THAA) in sediments also increased at approximately 200 mg/kg, and bioassays showed that sediment CO<sub>2</sub> production correlated positively with THAA. The results of this study provide an estimate for threshold amounts of bioavailable carbon present in aquifer sediments (approximately 200 mg/kg of PBOC; approximately 1,000 to 2,000 mg/kg of TOC) needed to support reductive dechlorination in groundwater systems.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Remediation","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Wiley Periodicals, Inc.","publisherLocation":"Hoboken, NJ","doi":"10.1002/rem.21318","usgsCitation":"Chapelle, F.H., Thomas, L.K., Bradley, P.M., Rectanus, H.V., and Widdowson, M.A., 2012, Threshold amounts of organic carbon needed to initiate reductive dechlorination in groundwater systems: Remediation Journal, v. 22, no. 3, p. 19-28, https://doi.org/10.1002/rem.21318.","productDescription":"10 p.","startPage":"19","endPage":"28","numberOfPages":"10","costCenters":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"links":[{"id":259375,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":259362,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/rem.21318","linkFileType":{"id":5,"text":"html"}}],"country":"United States","volume":"22","issue":"3","noUsgsAuthors":false,"publicationDate":"2012-06-07","publicationStatus":"PW","scienceBaseUri":"505bb353e4b08c986b325d0f","contributors":{"authors":[{"text":"Chapelle, Francis H. chapelle@usgs.gov","contributorId":1350,"corporation":false,"usgs":true,"family":"Chapelle","given":"Francis","email":"chapelle@usgs.gov","middleInitial":"H.","affiliations":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true},{"id":559,"text":"South Carolina Water Science Center","active":true,"usgs":true}],"preferred":true,"id":466112,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Thomas, Lashun K.","contributorId":58507,"corporation":false,"usgs":true,"family":"Thomas","given":"Lashun","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":466114,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bradley, Paul M. 0000-0001-7522-8606 pbradley@usgs.gov","orcid":"https://orcid.org/0000-0001-7522-8606","contributorId":361,"corporation":false,"usgs":true,"family":"Bradley","given":"Paul","email":"pbradley@usgs.gov","middleInitial":"M.","affiliations":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"preferred":true,"id":466111,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rectanus, Heather V.","contributorId":46351,"corporation":false,"usgs":true,"family":"Rectanus","given":"Heather","email":"","middleInitial":"V.","affiliations":[],"preferred":false,"id":466113,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Widdowson, Mark A.","contributorId":90379,"corporation":false,"usgs":true,"family":"Widdowson","given":"Mark","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":466115,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70039318,"text":"70039318 - 2012 - Geometric derivations of minimal sets of sufficient multiview constraints","interactions":[],"lastModifiedDate":"2012-08-02T01:01:49","indexId":"70039318","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3053,"text":"Photogrammetric Record","active":true,"publicationSubtype":{"id":10}},"title":"Geometric derivations of minimal sets of sufficient multiview constraints","docAbstract":"Geometric interpretations of four of the most common determinant formulations of multiview constraints are given, showing that they all enforce the same geometry and that all of the forms commonly in use in the machine vision community are a subset of a more general form. Generalising the work of Yi Ma yields a new general 2 x 2 determinant trilinear and 3 x 3 determinant quadlinear. Geometric descriptions of degenerate multiview constraints are given, showing that it is necessary, but insufficient, that the determinant equals zero. Understanding the degeneracies leads naturally into proofs for minimum sufficient sets of bilinear, trilinear and quadlinear constraints for arbitrary numbers of conjugate observations.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Photogrammetric Record","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Wiley","publisherLocation":"Hoboken, NJ","doi":"10.1111/j.1477-9730.2011.00653.x","usgsCitation":"Thomas, O.H., and Oshel, E.R., 2012, Geometric derivations of minimal sets of sufficient multiview constraints: Photogrammetric Record, v. 27, no. 137, p. 74-93, https://doi.org/10.1111/j.1477-9730.2011.00653.x.","productDescription":"20 p.","startPage":"74","endPage":"93","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":259346,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":259343,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1477-9730.2011.00653.x","linkFileType":{"id":5,"text":"html"}}],"volume":"27","issue":"137","noUsgsAuthors":false,"publicationDate":"2011-12-12","publicationStatus":"PW","scienceBaseUri":"505a2767e4b0c8380cd59860","contributors":{"authors":[{"text":"Thomas, Orrin H.","contributorId":30497,"corporation":false,"usgs":true,"family":"Thomas","given":"Orrin","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":466062,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Oshel, Edward R.","contributorId":60896,"corporation":false,"usgs":true,"family":"Oshel","given":"Edward","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":466063,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70038887,"text":"70038887 - 2012 - The importance of local and landscape-scale processes to the occupancy of wetlands by pond-breeding amphibians","interactions":[],"lastModifiedDate":"2012-10-01T17:02:55","indexId":"70038887","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3103,"text":"Population Ecology","active":true,"publicationSubtype":{"id":10}},"title":"The importance of local and landscape-scale processes to the occupancy of wetlands by pond-breeding amphibians","docAbstract":"Variation in the distribution and abundance of species across landscapes has traditionally been attributed to processes operating at fine spatial scales (i.e., environmental conditions at the scale of the sampling unit), but processes that operate across larger spatial scales such as seasonal migration or dispersal are also important. To determine the relative importance of these processes, we evaluated hypothesized relationships between the probability of occupancy in wetlands by two amphibians [wood frogs (Lithobates sylvaticus) and boreal chorus frogs (Pseudacris maculata)] and attributes of the landscape measured at three spatial scales in Rocky Mountain National Park, Colorado. We used cost-based buffers and least-cost distances to derive estimates of landscape attributes that may affect occupancy patterns from the broader spatial scales. The most highly ranked models provide strong support for a positive relationship between occupancy by breeding wood frogs and the amount of streamside habitat adjacent to a wetland. The model selection results for boreal chorus frogs are highly uncertain, though several of the most highly ranked models indicate a positive association between occupancy and the number of neighboring, occupied wetlands. We found little evidence that occupancy of either species was correlated with local-scale attributes measured at the scale of individual wetlands, suggesting that processes operating at broader scales may be more important in influencing occupancy patterns in amphibian populations.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Population Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Springer","publisherLocation":"Amsterdam, Netherlands","doi":"10.1007/s10144-012-0324-7","usgsCitation":"Scherer, R.D., Muths, E., and Noon, B., 2012, The importance of local and landscape-scale processes to the occupancy of wetlands by pond-breeding amphibians: Population Ecology, v. 54, no. 4, p. 487-498, https://doi.org/10.1007/s10144-012-0324-7.","productDescription":"12 p.","startPage":"487","endPage":"498","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":489048,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1007/s10144-012-0324-7","text":"Publisher Index Page"},{"id":259401,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":259383,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10144-012-0324-7","linkFileType":{"id":5,"text":"html"}}],"country":"United States","state":"Colorado","otherGeospatial":"Rocky Mountain National Park","volume":"54","issue":"4","noUsgsAuthors":false,"publicationDate":"2012-05-24","publicationStatus":"PW","scienceBaseUri":"505bacfae4b08c986b3238b7","contributors":{"authors":[{"text":"Scherer, Rick D.","contributorId":97368,"corporation":false,"usgs":false,"family":"Scherer","given":"Rick","email":"","middleInitial":"D.","affiliations":[{"id":6674,"text":"Department of Integrative Biology, University of Colorado Denver","active":true,"usgs":false}],"preferred":false,"id":465174,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Muths, Erin 0000-0002-5498-3132","orcid":"https://orcid.org/0000-0002-5498-3132","contributorId":14012,"corporation":false,"usgs":true,"family":"Muths","given":"Erin","affiliations":[],"preferred":false,"id":465172,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Noon, Barry R.","contributorId":57314,"corporation":false,"usgs":true,"family":"Noon","given":"Barry R.","affiliations":[],"preferred":false,"id":465173,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70039333,"text":"70039333 - 2012 - Fungal disease and the developing story of bat white-nose syndrome","interactions":[],"lastModifiedDate":"2015-05-06T10:26:01","indexId":"70039333","displayToPublicDate":"2012-08-01T00:00:00","publicationYear":"2012","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2981,"text":"PLoS Pathogens","active":true,"publicationSubtype":{"id":10}},"title":"Fungal disease and the developing story of bat white-nose syndrome","docAbstract":"<p>Two recently emerged cutaneous fungal diseases of wildlife, bat white-nose syndrome (WNS) and amphibian chytridiomycosis, have devastated affected populations. Fungal diseases are gaining recognition as significant causes of morbidity and mortality to plants, animals, and humans, yet fewer than 10% of fungal species are known. Furthermore, limited antifungal therapeutic drugs are available, antifungal therapeutics often have associated toxicity, and there are no approved antifungal vaccines. 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