{"pageNumber":"887","pageRowStart":"22150","pageSize":"25","recordCount":46734,"records":[{"id":70029920,"text":"70029920 - 2007 - Modeling of gas generation from the Barnett Shale, Fort Worth Basin, Texas","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029920","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Modeling of gas generation from the Barnett Shale, Fort Worth Basin, Texas","docAbstract":"The generative gas potential of the Mississippian Barnett Shale in the Fort Worth Basin, Texas, was quantitatively evaluated by sealed gold-tube pyrolysis. Kinetic parameters for gas generation and vitrinite reflectance (Ro) changes were calculated from pyrolysis data and the results used to estimate the amount of gas generated from the Barnett Shale at geologic heating rates. Using derived kinetics for Ro evolution and gas generation, quantities of hydrocarbon gas generated at Ro ??? 1.1% are about 230 L/t (7.4 scf/t) and increase to more that 5800 L/t (186 scf/t) at Ro ??? 2.0% for a sample with an initial total organic carbon content of 5.5% and Ro = 0.44%. The volume of shale gas generated will depend on the organic richness, thickness, and thermal maturity of the shale and also the amount of petroleum that is retained in the shale during migration. Gas that is reservoired in shales appears to be generated from the cracking of kerogen and petroleum that is retained in shales, and that cracking of the retained petroleum starts by Ro ??? 1.1%. This result suggests that the cracking of petroleum retained in source rocks occurs at rates that are faster than what is predicted for conventional siliciclastic and carbonate reservoirs, and that contact of retained petroleum with kerogen and shale mineralogy may be a critical factor in shale-gas generation. Shale-gas systems, together with overburden, can be considered complete petroleum systems, although the processes of petroleum migration, accumulation, and trap formation are different from what is defined for conventional petroleum systems. Copyright ?? 2007. The American Association of Petroleum Geologists. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"American Association of Petroleum Geologists Bulletin","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1306/12060606063","issn":"01491423","usgsCitation":"Hill, R., Zhang, E., Katz, B., and Tang, Y., 2007, Modeling of gas generation from the Barnett Shale, Fort Worth Basin, Texas: American Association of Petroleum Geologists Bulletin, v. 91, no. 4, p. 501-521, https://doi.org/10.1306/12060606063.","startPage":"501","endPage":"521","numberOfPages":"21","costCenters":[],"links":[{"id":212981,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1306/12060606063"},{"id":240557,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"91","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5c13e4b0c8380cd6f9f5","contributors":{"authors":[{"text":"Hill, R.J.","contributorId":92850,"corporation":false,"usgs":true,"family":"Hill","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":424911,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Zhang, E.","contributorId":26144,"corporation":false,"usgs":true,"family":"Zhang","given":"E.","email":"","affiliations":[],"preferred":false,"id":424909,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Katz, B.J.","contributorId":27265,"corporation":false,"usgs":true,"family":"Katz","given":"B.J.","email":"","affiliations":[],"preferred":false,"id":424910,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Tang, Y.","contributorId":104199,"corporation":false,"usgs":true,"family":"Tang","given":"Y.","affiliations":[],"preferred":false,"id":424912,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70029918,"text":"70029918 - 2007 - Total petroleum system assessment of undiscovered resources in the giant Barnett Shale continuous (unconventional) gas accumulation, Fort Worth Basin, Texas","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029918","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Total petroleum system assessment of undiscovered resources in the giant Barnett Shale continuous (unconventional) gas accumulation, Fort Worth Basin, Texas","docAbstract":"Undiscovered natural gas having potential for additions to reserves in the Mississippian Barnett Shale of the Fort Worth Basin, north-central Texas, was assessed using the total petroleum system assessment unit concept and a cell-based methodology for continuous-type (Unconventional) resources. The Barnett-Paleozoic total petroleum system is defined in the Bend arch-Fort Worth Basin as encompassing the area in which the organic-rich Barnett is the primary source rock for oil and gas produced from Paleozoic carbonate and clastic reservoirs. Exploration, technology, and drilling in the Barnett Shale play have rapidly evolved in recent years, with about 3500 vertical and 1000 horizontal wells completed in the Barnett through 2005 and more than 85% of the them completed since 1999. Using framework geology and historical production data, assessment of the Barnett Shale was performed by the U.S. Geological Survey using vertical wells at the peak of vertical well completions and before a transition to completions with horizontal wells. The assessment was performed after (1) mapping critical geological and geochemical parameters to define assessment unit areas with future potential, (2) defining distributions of drainage area (cell size) and estimating ultimate recovery per cell, and (3) estimating future success rates. Two assessment units are defined and assessed for the Barnett Shale continuous gas accumulation, resulting in a total mean undiscovered volume having potential for additions to reserves of 26.2 TCFG. The greater Newark East fracture-barrier continuous Barnett Shale gas assessment unit represents a core-producing area where thick, organic-rich, siliceous Barnett Shale is within the thermal window for gas generation (Ro ??? 1.1%) and is overlain and underlain by impermeable limestone barriers (Pennsylvanian Marble Falls Limestone and Ordovician Viola Limestone, respectively) that serve to confine induced fractures during well completion to maximize gas recovery. The extended continuous Barnett Shale gas assessment unit, which had been less explored, defines a geographic area where Barnett Shale is (1) within the thermal window for gas generation, (2) greater than 100 ft (30 m) thick, and (3) where at least one impermeable limestone barrier is absent. Mean undiscovered gas having potential for additions to reserves in the greater Newark East assessment unit is estimated at 14.6 tcf, and in the less tested extended assessment unit, a mean resource is estimated at 11.6 TCFG. A third hypothetical basin-arch Barnett Shale oil assessment unit was defined but not assessed because of a lack of production data. Copyright ?? 2007. The American Association of Petroleum Geologists. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"American Association of Petroleum Geologists Bulletin","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1306/06200606007","issn":"01491423","usgsCitation":"Pollastro, R.M., 2007, Total petroleum system assessment of undiscovered resources in the giant Barnett Shale continuous (unconventional) gas accumulation, Fort Worth Basin, Texas: American Association of Petroleum Geologists Bulletin, v. 91, no. 4, p. 551-578, https://doi.org/10.1306/06200606007.","startPage":"551","endPage":"578","numberOfPages":"28","costCenters":[],"links":[{"id":212955,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1306/06200606007"},{"id":240526,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"91","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb594e4b08c986b3267ba","contributors":{"authors":[{"text":"Pollastro, R. M.","contributorId":6809,"corporation":false,"usgs":true,"family":"Pollastro","given":"R.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":424901,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70029916,"text":"70029916 - 2007 - The Northern end of the Dead Sea Basin: Geometry from reflection seismic evidence","interactions":[],"lastModifiedDate":"2017-11-18T10:02:07","indexId":"70029916","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3525,"text":"Tectonophysics","active":true,"publicationSubtype":{"id":10}},"title":"The Northern end of the Dead Sea Basin: Geometry from reflection seismic evidence","docAbstract":"Recently released reflection seismic lines from the Eastern side of the Jordan River north of the Dead Sea were interpreted by using borehole data and incorporated with the previously published seismic lines of the eastern side of the Jordan River. For the first time, the lines from the eastern side of the Jordan River were combined with the published reflection seismic lines from the western side of the Jordan River. In the complete cross sections, the inner deep basin is strongly asymmetric toward the Jericho Fault supporting the interpretation of this segment of the fault as the long-lived and presently active part of the Dead Sea Transform. There is no indication for a shift of the depocenter toward a hypothetical eastern major fault with time, as recently suggested. Rather, the north-eastern margin of the deep basin takes the form of a large flexure, modestly faulted. In the N-S-section along its depocenter, the floor of the basin at its northern end appears to deepen continuously by roughly 0.5??km over 10??km distance, without evidence of a transverse fault. The asymmetric and gently-dipping shape of the basin can be explained by models in which the basin is located outside the area of overlap between en-echelon strike-slip faults. ?? 2007 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Tectonophysics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.tecto.2007.02.007","issn":"00401951","usgsCitation":"Al-Zoubi, A., Heinrichs, T., Qabbani, I., and ten Brink, U., 2007, The Northern end of the Dead Sea Basin: Geometry from reflection seismic evidence: Tectonophysics, v. 434, no. 1-4, p. 55-69, https://doi.org/10.1016/j.tecto.2007.02.007.","productDescription":"15 p.","startPage":"55","endPage":"69","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":240493,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Israel, Jordan, Palestine","otherGeospatial":"Dead Sea","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              35.321044921875,\n              31.344254455668054\n            ],\n            [\n              35.68359375,\n              31.344254455668054\n            ],\n            [\n              35.68359375,\n              31.83089906339438\n            ],\n            [\n              35.321044921875,\n              31.83089906339438\n            ],\n            [\n              35.321044921875,\n              31.344254455668054\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"434","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba85ee4b08c986b321ba1","contributors":{"authors":[{"text":"Al-Zoubi, A. S.","contributorId":94454,"corporation":false,"usgs":true,"family":"Al-Zoubi","given":"A. S.","affiliations":[],"preferred":false,"id":424892,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Heinrichs, T.","contributorId":24999,"corporation":false,"usgs":true,"family":"Heinrichs","given":"T.","email":"","affiliations":[],"preferred":false,"id":424889,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Qabbani, I.","contributorId":85388,"corporation":false,"usgs":true,"family":"Qabbani","given":"I.","email":"","affiliations":[],"preferred":false,"id":424891,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"ten Brink, Uri S. 0000-0001-6858-3001 utenbrink@usgs.gov","orcid":"https://orcid.org/0000-0001-6858-3001","contributorId":127560,"corporation":false,"usgs":true,"family":"ten Brink","given":"Uri S.","email":"utenbrink@usgs.gov","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true},{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"preferred":false,"id":424890,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70029914,"text":"70029914 - 2007 - Predicting the potential distribution of invasive exotic species using GIS and information-theoretic approaches: A case of ragweed (Ambrosia artemisiifolia L.) distribution in China","interactions":[],"lastModifiedDate":"2017-04-14T13:21:52","indexId":"70029914","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1235,"text":"Chinese Science Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Predicting the potential distribution of invasive exotic species using GIS and information-theoretic approaches: A case of ragweed (Ambrosia artemisiifolia L.) distribution in China","docAbstract":"Invasive exotic species pose a growing threat to the economy, public health, and ecological integrity of nations worldwide. Explaining and predicting the spatial distribution of invasive exotic species is of great importance to prevention and early warning efforts. We are investigating the potential distribution of invasive exotic species, the environmental factors that influence these distributions, and the ability to predict them using statistical and information-theoretic approaches. For some species, detailed presence/absence occurrence data are available, allowing the use of a variety of standard statistical techniques. However, for most species, absence data are not available. Presented with the challenge of developing a model based on presence-only information, we developed an improved logistic regression approach using Information Theory and Frequency Statistics to produce a relative suitability map. This paper generated a variety of distributions of ragweed (Ambrosia artemisiifolia L.) from logistic regression models applied to herbarium specimen location data and a suite of GIS layers including climatic, topographic, and land cover information. Our logistic regression model was based on Akaike's Information Criterion (AIC) from a suite of ecologically reasonable predictor variables. Based on the results we provided a new Frequency Statistical method to compartmentalize habitat-suitability in the native range. Finally, we used the model and the compartmentalized criterion developed in native ranges to \"project\" a potential distribution onto the exotic ranges to build habitat-suitability maps. ?? Science in China Press 2007.","language":"English","publisher":"Springer","doi":"10.1007/s11434-007-0192-2","issn":"10016538","usgsCitation":"Hao, C., LiJun, C., and Albright, T.P., 2007, Predicting the potential distribution of invasive exotic species using GIS and information-theoretic approaches: A case of ragweed (Ambrosia artemisiifolia L.) distribution in China: Chinese Science Bulletin, v. 52, no. 9, p. 1223-1230, https://doi.org/10.1007/s11434-007-0192-2.","productDescription":"8 p.","startPage":"1223","endPage":"1230","numberOfPages":"8","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":240459,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212894,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s11434-007-0192-2"}],"volume":"52","issue":"9","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a81d4e4b0c8380cd7b769","contributors":{"authors":[{"text":"Hao, Chen","contributorId":89306,"corporation":false,"usgs":true,"family":"Hao","given":"Chen","email":"","affiliations":[],"preferred":false,"id":424880,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"LiJun, Chen","contributorId":95241,"corporation":false,"usgs":true,"family":"LiJun","given":"Chen","email":"","affiliations":[],"preferred":false,"id":424881,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Albright, Thomas P.","contributorId":78114,"corporation":false,"usgs":true,"family":"Albright","given":"Thomas","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":424879,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029913,"text":"70029913 - 2007 - Automated classifications of topography from DEMs by an unsupervised nested-means algorithm and a three-part geometric signature","interactions":[],"lastModifiedDate":"2023-08-25T11:46:22.779709","indexId":"70029913","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1801,"text":"Geomorphology","active":true,"publicationSubtype":{"id":10}},"title":"Automated classifications of topography from DEMs by an unsupervised nested-means algorithm and a three-part geometric signature","docAbstract":"<div id=\"abstracts\" class=\"Abstracts u-font-gulliver text-s\"><div id=\"aep-abstract-id20\" class=\"abstract author\"><div id=\"aep-abstract-sec-id21\"><p>An iterative procedure that implements the classification of continuous topography as a problem in digital image-processing automatically divides an area into categories of surface form; three taxonomic criteria–slope gradient, local convexity, and surface texture–are calculated from a square-grid digital elevation model (DEM). The sequence of programmed operations combines twofold-partitioned maps of the three variables converted to greyscale images, using the mean of each variable as the dividing threshold. To subdivide increasingly subtle topography, grid cells sloping at less than mean gradient of the input DEM are classified by designating mean values of successively lower-sloping subsets of the study area (nested means) as taxonomic thresholds, thereby increasing the number of output categories from the minimum 8 to 12 or 16. Program output is exemplified by 16 topographic types for the world at 1-km spatial resolution (SRTM30 data), the Japanese Islands at 270&nbsp;m, and part of Hokkaido at 55&nbsp;m. Because the procedure is unsupervised and reflects frequency distributions of the input variables rather than pre-set criteria, the resulting classes are undefined and must be calibrated empirically by subsequent analysis. Maps of the example classifications reflect physiographic regions, geological structure, and landform as well as slope materials and processes; fine-textured terrain categories tend to correlate with erosional topography or older surfaces, coarse-textured classes with areas of little dissection. In Japan the resulting classes approximate landform types mapped from airphoto analysis, while in the Americas they create map patterns resembling Hammond's terrain types or surface-form classes; SRTM30 output for the United States compares favorably with Fenneman's physical divisions. Experiments are suggested for further developing the method; the Arc/Info AML and the map of terrain classes for the world are available as online downloads.</p></div></div></div>","language":"English","publisher":"Elsevier","doi":"10.1016/j.geomorph.2006.09.012","issn":"0169555X","usgsCitation":"Iwahashi, J., and Pike, R., 2007, Automated classifications of topography from DEMs by an unsupervised nested-means algorithm and a three-part geometric signature: Geomorphology, v. 86, no. 3-4, p. 409-440, https://doi.org/10.1016/j.geomorph.2006.09.012.","productDescription":"32 p.","startPage":"409","endPage":"440","numberOfPages":"32","costCenters":[],"links":[{"id":240458,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"86","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059eef2e4b0c8380cd4a062","contributors":{"authors":[{"text":"Iwahashi, J.","contributorId":85778,"corporation":false,"usgs":true,"family":"Iwahashi","given":"J.","email":"","affiliations":[],"preferred":false,"id":424878,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pike, R.J.","contributorId":72814,"corporation":false,"usgs":true,"family":"Pike","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":424877,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029910,"text":"70029910 - 2007 - Regression models for estimating coseismic landslide displacement","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029910","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1517,"text":"Engineering Geology","active":true,"publicationSubtype":{"id":10}},"title":"Regression models for estimating coseismic landslide displacement","docAbstract":"Newmark's sliding-block model is widely used to estimate coseismic slope performance. Early efforts to develop simple regression models to estimate Newmark displacement were based on analysis of the small number of strong-motion records then available. The current availability of a much larger set of strong-motion records dictates that these regression equations be updated. Regression equations were generated using data derived from a collection of 2270 strong-motion records from 30 worldwide earthquakes. The regression equations predict Newmark displacement in terms of (1) critical acceleration ratio, (2) critical acceleration ratio and earthquake magnitude, (3) Arias intensity and critical acceleration, and (4) Arias intensity and critical acceleration ratio. These equations are well constrained and fit the data well (71% < R2 < 88%), but they have standard deviations of about 0.5 log units, such that the range defined by the mean ?? one standard deviation spans about an order of magnitude. These regression models, therefore, are not recommended for use in site-specific design, but rather for regional-scale seismic landslide hazard mapping or for rapid preliminary screening of sites. ?? 2007 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Engineering Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.enggeo.2007.01.013","issn":"00137952","usgsCitation":"Jibson, R., 2007, Regression models for estimating coseismic landslide displacement: Engineering Geology, v. 91, no. 2-4, p. 209-218, https://doi.org/10.1016/j.enggeo.2007.01.013.","startPage":"209","endPage":"218","numberOfPages":"10","costCenters":[],"links":[{"id":212840,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.enggeo.2007.01.013"},{"id":240392,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"91","issue":"2-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"50e4a5cee4b0e8fec6cdc006","contributors":{"authors":[{"text":"Jibson, R.W.","contributorId":8467,"corporation":false,"usgs":true,"family":"Jibson","given":"R.W.","email":"","affiliations":[],"preferred":false,"id":424866,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70029906,"text":"70029906 - 2007 - Relative influence of streamflows in assessing temporal variability in stream habitat","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029906","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2529,"text":"Journal of the American Water Resources Association","active":true,"publicationSubtype":{"id":10}},"title":"Relative influence of streamflows in assessing temporal variability in stream habitat","docAbstract":"The effects of streamflows on temporal variation in stream habitat were analyzed from the data collected 6-11 years apart at 38 sites across the United States. Multiple linear regression was used to assess the variation in habitat caused by streamflow at the time of sampling and high flows between sampling. In addition to flow variables, the model also contained geomorphic and land use factors. The regression model was statistically significant (p < 0.05; R 2 = 0.31-0.46) for 5 of 14 habitat variables: mean wetted stream depth, mean bankfull depth, mean wetted stream width, coefficient of variation of wetted stream width, and the percent frequency of bank erosion. High flows between samples accounted for about 16% of the total variation in the frequency of bank erosion. Streamflow at the time of sampling was the main source of variation in mean stream depth and contributed to the variation in mean stream width and the frequency of bank erosion. Urban land use (population change) accounted for over 20% of the total variation in mean bankfull depth, 15% of the total variation in the coefficient of variation of stream width, and about 10% of the variation in mean stream width. ?? 2007 American Water Resources Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of the American Water Resources Association","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1752-1688.2007.00051.x","issn":"1093474X","usgsCitation":"Goldstein, R.M., Meador, M.R., and Ruhl, K., 2007, Relative influence of streamflows in assessing temporal variability in stream habitat: Journal of the American Water Resources Association, v. 43, no. 3, p. 642-650, https://doi.org/10.1111/j.1752-1688.2007.00051.x.","startPage":"642","endPage":"650","numberOfPages":"9","costCenters":[],"links":[{"id":240354,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212810,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1752-1688.2007.00051.x"}],"volume":"43","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-05-07","publicationStatus":"PW","scienceBaseUri":"505aa68ce4b0c8380cd84ef6","contributors":{"authors":[{"text":"Goldstein, R. M.","contributorId":98305,"corporation":false,"usgs":true,"family":"Goldstein","given":"R.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":424849,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Meador, M. R.","contributorId":74400,"corporation":false,"usgs":true,"family":"Meador","given":"M.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":424847,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ruhl, K.E.","contributorId":92869,"corporation":false,"usgs":true,"family":"Ruhl","given":"K.E.","email":"","affiliations":[],"preferred":false,"id":424848,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029905,"text":"70029905 - 2007 - Temporal patterns of diversity: Assessing the biotic and abiotic controls on ant assemblages","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029905","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1019,"text":"Biological Journal of the Linnean Society","active":true,"publicationSubtype":{"id":10}},"title":"Temporal patterns of diversity: Assessing the biotic and abiotic controls on ant assemblages","docAbstract":"In this study, we use 12 months of data from 11 ant assemblages to test whether seasonal variation in ant diversity is governed by either the structuring influences of interspecific competition or environmental conditions. Because the importance of competition might vary along environmental gradients, we also test whether the signature of competition depends on elevation. We find little evidence that competition structures the seasonal patterns of activity in the ant assemblages considered, but find support for the effects of temperature on seasonal patterns of diversity, especially at low-elevation sites. Although, in general, both competition and the environment interact to structure ant assemblages, our results suggest that environmental conditions are the primary force structuring the seasonal activity of the ant assemblages studied here. ?? 2007 The Linnean Society of London.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Biological Journal of the Linnean Society","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1095-8312.2007.00783.x","issn":"00244066","usgsCitation":"Dunn, R., Parker, C., and Sanders, N., 2007, Temporal patterns of diversity: Assessing the biotic and abiotic controls on ant assemblages: Biological Journal of the Linnean Society, v. 91, no. 2, p. 191-201, https://doi.org/10.1111/j.1095-8312.2007.00783.x.","startPage":"191","endPage":"201","numberOfPages":"11","costCenters":[],"links":[{"id":477117,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1095-8312.2007.00783.x","text":"Publisher Index Page"},{"id":212781,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1095-8312.2007.00783.x"},{"id":240319,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"91","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-05-23","publicationStatus":"PW","scienceBaseUri":"505ba514e4b08c986b3207cb","contributors":{"authors":[{"text":"Dunn, R.R.","contributorId":45111,"corporation":false,"usgs":true,"family":"Dunn","given":"R.R.","email":"","affiliations":[],"preferred":false,"id":424845,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Parker, C.R.","contributorId":21892,"corporation":false,"usgs":true,"family":"Parker","given":"C.R.","email":"","affiliations":[],"preferred":false,"id":424844,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Sanders, N.J.","contributorId":61639,"corporation":false,"usgs":true,"family":"Sanders","given":"N.J.","email":"","affiliations":[],"preferred":false,"id":424846,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029904,"text":"70029904 - 2007 - Assessment of exploration bias in data-driven predictive models and the estimation of undiscovered resources","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029904","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2832,"text":"Natural Resources Research","onlineIssn":"1573-8981","printIssn":"1520-7439","active":true,"publicationSubtype":{"id":10}},"title":"Assessment of exploration bias in data-driven predictive models and the estimation of undiscovered resources","docAbstract":"The spatial distribution of discovered resources may not fully mimic the distribution of all such resources, discovered and undiscovered, because the process of discovery is biased by accessibility factors (e.g., outcrops, roads, and lakes) and by exploration criteria. In data-driven predictive models, the use of training sites (resource occurrences) biased by exploration criteria and accessibility does not necessarily translate to a biased predictive map. However, problems occur when evidence layers correlate with these same exploration factors. These biases then can produce a data-driven model that predicts known occurrences well, but poorly predicts undiscovered resources. Statistical assessment of correlation between evidence layers and map-based exploration factors is difficult because it is difficult to quantify the \"degree of exploration.\" However, if such a degree-of-exploration map can be produced, the benefits can be enormous. Not only does it become possible to assess this correlation, but it becomes possible to predict undiscovered, instead of discovered, resources. Using geothermal systems in Nevada, USA, as an example, a degree-of-exploration model is created, which then is resolved into purely explored and unexplored equivalents, each occurring within coextensive study areas. A weights-of-evidence (WofE) model is built first without regard to the degree of exploration, and then a revised WofE model is calculated for the \"explored fraction\" only. Differences in the weights between the two models provide a correlation measure between the evidence and the degree of exploration. The data used to build the geothermal evidence layers are perceived to be independent of degree of exploration. Nevertheless, the evidence layers correlate with exploration because exploration has preferred the same favorable areas identified by the evidence patterns. In this circumstance, however, the weights for the \"explored\" WofE model minimize this bias. Using these revised weights, posterior probability is extrapolated into unexplored areas to estimate undiscovered deposits. ?? International Association for Mathematical Geology 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Natural Resources Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s11053-007-9037-6","issn":"15207439","usgsCitation":"Coolbaugh, M., Raines, G.L., and Zehner, R.E., 2007, Assessment of exploration bias in data-driven predictive models and the estimation of undiscovered resources: Natural Resources Research, v. 16, no. 2, p. 199-207, https://doi.org/10.1007/s11053-007-9037-6.","startPage":"199","endPage":"207","numberOfPages":"9","costCenters":[],"links":[{"id":212780,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s11053-007-9037-6"},{"id":240318,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-05-16","publicationStatus":"PW","scienceBaseUri":"5059ee2ee4b0c8380cd49beb","contributors":{"authors":[{"text":"Coolbaugh, M.F.","contributorId":55034,"corporation":false,"usgs":true,"family":"Coolbaugh","given":"M.F.","affiliations":[],"preferred":false,"id":424841,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Raines, G. L.","contributorId":90720,"corporation":false,"usgs":true,"family":"Raines","given":"G.","middleInitial":"L.","affiliations":[],"preferred":false,"id":424843,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zehner, R. E.","contributorId":67933,"corporation":false,"usgs":true,"family":"Zehner","given":"R.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":424842,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029896,"text":"70029896 - 2007 - Developing methods to assess and predict the population level effects of environmental contaminants.","interactions":[],"lastModifiedDate":"2013-03-24T14:15:43","indexId":"70029896","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2006,"text":"Integrated Environmental Assessment and Management","active":true,"publicationSubtype":{"id":10}},"title":"Developing methods to assess and predict the population level effects of environmental contaminants.","docAbstract":"The field of ecological toxicity seems largely to have drifted away from what its title implies--assessing and predicting the ecological consequences of environmental contaminants--moving instead toward an emphasis on individual effects and physiologic case studies. This paper elucidates how a relatively new ecological methodology, interaction assessment (INTASS), could be useful in addressing the field's initial goals. Specifically, INTASS is a model platform and methodology, applicable across a broad array of taxa and habitat types, that can be used to construct population dynamics models from field data. Information on environmental contaminants and multiple stressors can be incorporated into these models in a form that bypasses the problems inherent in assessing uptake, chemical interactions in the environment, and synergistic effects in the organism. INTASS can, therefore, be used to evaluate the effects of contaminants and other stressors at the population level and to predict how changes in stressor levels or composition of contaminant mixtures, as well as various mitigation measures, might affect population dynamics.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Integrated Environmental Assessment and Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1897/IEAM_2005-080.1","issn":"15513777","usgsCitation":"Emlen, J., and Springman, K., 2007, Developing methods to assess and predict the population level effects of environmental contaminants.: Integrated Environmental Assessment and Management, v. 3, no. 2, p. 157-165, https://doi.org/10.1897/IEAM_2005-080.1.","startPage":"157","endPage":"165","numberOfPages":"9","costCenters":[],"links":[{"id":477121,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1897/ieam_2005-080.1","text":"Publisher Index Page"},{"id":212659,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1897/IEAM_2005-080.1"},{"id":240181,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"3","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-04-01","publicationStatus":"PW","scienceBaseUri":"505a0011e4b0c8380cd4f586","contributors":{"authors":[{"text":"Emlen, J.M.","contributorId":63979,"corporation":false,"usgs":true,"family":"Emlen","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":424809,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Springman, K.R.","contributorId":79302,"corporation":false,"usgs":true,"family":"Springman","given":"K.R.","email":"","affiliations":[],"preferred":false,"id":424810,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029894,"text":"70029894 - 2007 - Deriving a light use efficiency model from eddy covariance flux data for predicting daily gross primary production across biomes","interactions":[],"lastModifiedDate":"2017-04-12T16:04:03","indexId":"70029894","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":681,"text":"Agricultural and Forest Meteorology","active":true,"publicationSubtype":{"id":10}},"title":"Deriving a light use efficiency model from eddy covariance flux data for predicting daily gross primary production across biomes","docAbstract":"<p><span>The quantitative simulation of gross primary production (GPP) at various spatial and temporal scales has been a major challenge in quantifying the global carbon cycle. We developed a light use efficiency (LUE) daily GPP model from eddy covariance (EC) measurements. The model, called EC-LUE, is driven by only four variables: normalized difference vegetation index (NDVI), photosynthetically active radiation (PAR), air temperature, and the Bowen ratio of sensible to latent heat flux (used to calculate moisture stress). The EC-LUE model relies on two assumptions: First, that the fraction of absorbed PAR (fPAR) is a linear function of NDVI; Second, that the realized light use efficiency, calculated from a biome-independent invariant potential LUE, is controlled by air temperature or soil moisture, whichever is most limiting. The EC-LUE model was calibrated and validated using 24,349 daily GPP estimates derived from 28 eddy covariance flux towers from the AmeriFlux and EuroFlux networks, covering a variety of forests, grasslands and savannas. The model explained 85% and 77% of the observed variations of daily GPP for all the calibration and validation sites, respectively. A comparison with GPP calculated from the Moderate Resolution Imaging Spectroradiometer (MODIS) indicated that the EC-LUE model predicted GPP that better matched tower data across these sites. The realized LUE was predominantly controlled by moisture conditions throughout the growing season, and controlled by temperature only at the beginning and end of the growing season. The EC-LUE model is an alternative approach that makes it possible to map daily GPP over large areas because (1) the potential LUE is invariant across various land cover types and (2) all driving forces of the model can be derived from remote sensing data or existing climate observation networks.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.agrformet.2006.12.001","issn":"01681923","usgsCitation":"Yuan, W., Liu, S., Zhou, G., Tieszen, L., Baldocchi, D., Bernhofer, C., Gholz, H., Goldstein, A.H., Goulden, M.L., Hollinger, D., Hu, Y., Law, B.E., Stoy, P., Vesala, T., and Wofsy, S., 2007, Deriving a light use efficiency model from eddy covariance flux data for predicting daily gross primary production across biomes: Agricultural and Forest Meteorology, v. 143, no. 3-4, p. 189-207, https://doi.org/10.1016/j.agrformet.2006.12.001.","productDescription":"19 p.","startPage":"189","endPage":"207","numberOfPages":"19","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":476983,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://escholarship.org/uc/item/0nv498zp","text":"External Repository"},{"id":240683,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213094,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.agrformet.2006.12.001"}],"volume":"143","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fedee4b0c8380cd4ef81","contributors":{"authors":[{"text":"Yuan, W.","contributorId":35955,"corporation":false,"usgs":true,"family":"Yuan","given":"W.","email":"","affiliations":[],"preferred":false,"id":424791,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Liu, S.","contributorId":93170,"corporation":false,"usgs":true,"family":"Liu","given":"S.","affiliations":[],"preferred":false,"id":424798,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zhou, G.","contributorId":12604,"corporation":false,"usgs":true,"family":"Zhou","given":"G.","email":"","affiliations":[],"preferred":false,"id":424786,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Tieszen, L.L.","contributorId":24046,"corporation":false,"usgs":true,"family":"Tieszen","given":"L.L.","email":"","affiliations":[],"preferred":false,"id":424789,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Baldocchi, D.","contributorId":40368,"corporation":false,"usgs":true,"family":"Baldocchi","given":"D.","affiliations":[],"preferred":false,"id":424793,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Bernhofer, C.","contributorId":37964,"corporation":false,"usgs":true,"family":"Bernhofer","given":"C.","email":"","affiliations":[],"preferred":false,"id":424792,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Gholz, H.","contributorId":107938,"corporation":false,"usgs":true,"family":"Gholz","given":"H.","email":"","affiliations":[],"preferred":false,"id":424799,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Goldstein, Allen H.","contributorId":7452,"corporation":false,"usgs":true,"family":"Goldstein","given":"Allen","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":424785,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Goulden, M. L.","contributorId":35095,"corporation":false,"usgs":false,"family":"Goulden","given":"M.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":424790,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Hollinger, D.Y.","contributorId":86567,"corporation":false,"usgs":true,"family":"Hollinger","given":"D.Y.","email":"","affiliations":[],"preferred":false,"id":424797,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Hu, Y.","contributorId":68474,"corporation":false,"usgs":true,"family":"Hu","given":"Y.","email":"","affiliations":[],"preferred":false,"id":424796,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Law, B. E.","contributorId":17586,"corporation":false,"usgs":true,"family":"Law","given":"B.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":424787,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Stoy, Paul C.","contributorId":60860,"corporation":false,"usgs":true,"family":"Stoy","given":"Paul C.","affiliations":[],"preferred":false,"id":424795,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Vesala, T.","contributorId":21355,"corporation":false,"usgs":true,"family":"Vesala","given":"T.","affiliations":[],"preferred":false,"id":424788,"contributorType":{"id":1,"text":"Authors"},"rank":15},{"text":"Wofsy, S.C.","contributorId":44699,"corporation":false,"usgs":true,"family":"Wofsy","given":"S.C.","email":"","affiliations":[],"preferred":false,"id":424794,"contributorType":{"id":1,"text":"Authors"},"rank":16}]}}
,{"id":70029883,"text":"70029883 - 2007 - Geochemical proxies of North American freshwater routing during the Younger Dryas cold event","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029883","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3165,"text":"Proceedings of the National Academy of Sciences of the United States of America","active":true,"publicationSubtype":{"id":10}},"title":"Geochemical proxies of North American freshwater routing during the Younger Dryas cold event","docAbstract":"The Younger Dryas cold interval represents a time when much of the Northern Hemisphere cooled from ???12.9 to 11.5 kiloyears B.P. The cause of this event, which has long been viewed as the canonical example of abrupt climate change, was initially attributed to the routing of freshwater to the St. Lawrence River with an attendant reduction in Atlantic meridional overturning circulation. However, this mechanism has recently been questioned because current proxies and dating techniques have been unable to confirm that eastward routing with an increase in freshwater flux occurred during the Younger Dryas. Here we use new geochemical proxies (??Mg/Ca, U/Ca, and 87Sr/86Sr) measured in planktonic foraminifera at the mouth of the St. Lawrence estuary as tracers of freshwater sources to further evaluate this question. Our proxies, combined with planktonic ??18Oseawater and ??13C, confirm that routing of runoff from western Canada to the St. Lawrence River occurred at the start of the Younger Dryas, with an attendant increase in freshwater flux of 0.06 ?? 0.02 Sverdrup (1 Sverdrup = 106 m3??s-1). This base discharge increase is sufficient to have reduced Atlantic meridional overturning circulation and caused the Younger Dryas cold interval. In addition, our data indicate subsequent fluctuations in the freshwater flux to the St. Lawrence River of ???0.06-0.12 Sverdrup, thus explaining the variability in the overturning circulation and climate during the Younger Dryas. ?? 2007 by The National Academy of Sciences of the USA.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Proceedings of the National Academy of Sciences of the United States of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1073/pnas.0611313104","issn":"00278424","usgsCitation":"Carlson, A., Clark, P., Haley, B., Klinkhammer, G., Simmons, K., Brook, E., and Meissner, K.J., 2007, Geochemical proxies of North American freshwater routing during the Younger Dryas cold event: Proceedings of the National Academy of Sciences of the United States of America, v. 104, no. 16, p. 6556-6561, https://doi.org/10.1073/pnas.0611313104.","startPage":"6556","endPage":"6561","numberOfPages":"6","costCenters":[],"links":[{"id":477060,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://doi.org/10.1073/pnas.0611313104","text":"External Repository"},{"id":212924,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1073/pnas.0611313104"},{"id":240491,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"104","issue":"16","noUsgsAuthors":false,"publicationDate":"2007-04-17","publicationStatus":"PW","scienceBaseUri":"505a1696e4b0c8380cd551d4","contributors":{"authors":[{"text":"Carlson, A.E.","contributorId":54825,"corporation":false,"usgs":true,"family":"Carlson","given":"A.E.","email":"","affiliations":[],"preferred":false,"id":424725,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Clark, P.U.","contributorId":78449,"corporation":false,"usgs":true,"family":"Clark","given":"P.U.","email":"","affiliations":[],"preferred":false,"id":424727,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Haley, B.A.","contributorId":52047,"corporation":false,"usgs":true,"family":"Haley","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":424724,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Klinkhammer, G.P.","contributorId":86232,"corporation":false,"usgs":true,"family":"Klinkhammer","given":"G.P.","email":"","affiliations":[],"preferred":false,"id":424728,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Simmons, K.","contributorId":75333,"corporation":false,"usgs":true,"family":"Simmons","given":"K.","affiliations":[],"preferred":false,"id":424726,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Brook, E.J.","contributorId":23292,"corporation":false,"usgs":true,"family":"Brook","given":"E.J.","email":"","affiliations":[],"preferred":false,"id":424722,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Meissner, K. J.","contributorId":29704,"corporation":false,"usgs":false,"family":"Meissner","given":"K.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":424723,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70029878,"text":"70029878 - 2007 - Development and implementation of a Bayesian-based aquifer vulnerability assessment in Florida","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029878","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2832,"text":"Natural Resources Research","onlineIssn":"1573-8981","printIssn":"1520-7439","active":true,"publicationSubtype":{"id":10}},"title":"Development and implementation of a Bayesian-based aquifer vulnerability assessment in Florida","docAbstract":"The Florida Aquifer Vulnerability Assessment (FAVA) was designed to provide a tool for environmental, regulatory, resource management, and planning professionals to facilitate protection of groundwater resources from surface sources of contamination. The FAVA project implements weights-of-evidence (WofE), a data-driven, Bayesian-probabilistic model to generate a series of maps reflecting relative aquifer vulnerability of Florida's principal aquifer systems. The vulnerability assessment process, from project design to map implementation is described herein in reference to the Floridan aquifer system (FAS). The WofE model calculates weighted relationships between hydrogeologic data layers that influence aquifer vulnerability and ambient groundwater parameters in wells that reflect relative degrees of vulnerability. Statewide model input data layers (evidential themes) include soil hydraulic conductivity, density of karst features, thickness of aquifer confinement, and hydraulic head difference between the FAS and the watertable. Wells with median dissolved nitrogen concentrations exceeding statistically established thresholds serve as training points in the WofE model. The resulting vulnerability map (response theme) reflects classified posterior probabilities based on spatial relationships between the evidential themes and training points. The response theme is subjected to extensive sensitivity and validation testing. Among the model validation techniques is calculation of a response theme based on a different water-quality indicator of relative recharge or vulnerability: dissolved oxygen. Successful implementation of the FAVA maps was facilitated by the overall project design, which included a needs assessment and iterative technical advisory committee input and review. Ongoing programs to protect Florida's springsheds have led to development of larger-scale WofE-based vulnerability assessments. Additional applications of the maps include land-use planning amendments and prioritization of land purchases to protect groundwater resources. ?? International Association for Mathematical Geology 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Natural Resources Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s11053-007-9038-5","issn":"15207439","usgsCitation":"Arthur, J.D., Wood, H., Baker, A., Cichon, J., and Raines, G.L., 2007, Development and implementation of a Bayesian-based aquifer vulnerability assessment in Florida: Natural Resources Research, v. 16, no. 2, p. 93-107, https://doi.org/10.1007/s11053-007-9038-5.","startPage":"93","endPage":"107","numberOfPages":"15","costCenters":[],"links":[{"id":212867,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s11053-007-9038-5"},{"id":240425,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-06-02","publicationStatus":"PW","scienceBaseUri":"505a0024e4b0c8380cd4f5ea","contributors":{"authors":[{"text":"Arthur, J. D.","contributorId":67924,"corporation":false,"usgs":true,"family":"Arthur","given":"J.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":424705,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wood, H.A.R.","contributorId":10623,"corporation":false,"usgs":true,"family":"Wood","given":"H.A.R.","email":"","affiliations":[],"preferred":false,"id":424703,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Baker, A.E.","contributorId":54022,"corporation":false,"usgs":true,"family":"Baker","given":"A.E.","email":"","affiliations":[],"preferred":false,"id":424704,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cichon, J.R.","contributorId":68115,"corporation":false,"usgs":true,"family":"Cichon","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":424706,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Raines, G. L.","contributorId":90720,"corporation":false,"usgs":true,"family":"Raines","given":"G.","middleInitial":"L.","affiliations":[],"preferred":false,"id":424707,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70029868,"text":"70029868 - 2007 - Field-derived relationships for flow velocity and resistance in high-gradient streams","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029868","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Field-derived relationships for flow velocity and resistance in high-gradient streams","docAbstract":"We measured velocity and channel geometry in 10 reaches (bed gradient = 0.08-0.21) of a predominantly step-pool channel, the Rio Cordon, Italy, over a range of discharges (3-80% of the bankfull discharge). The resulting data were used to compute flow resistance. At-a-station hydraulic geometry relations indicate that in most reaches, the exponent describing the rate of velocity increases with discharge was between 0.48 and 0.6, which is within the range of published values for pool-riffle channels. The Rio Cordon data are also combined with published hydraulics data from step-pool streams to explore non-dimensional relationships between velocity and flow resistance and factors including unit discharge, channel gradient, and step geometry. Multiple regression analysis of this combined field dataset indicated that dimensionless unit discharge (q*) is the most important independent variable overall in explaining variations in velocity and flow resistance, followed by channel slope and the ratio of step height to step length. Empirical equations are provided both for dimensionless velocity and flow resistance, but prediction of the former variable appears more reliable. ?? 2007 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jhydrol.2007.03.021","issn":"00221694","usgsCitation":"Comiti, F., Mao, L., Wilcox, A., Wohl, E., and Lenzi, M., 2007, Field-derived relationships for flow velocity and resistance in high-gradient streams: Journal of Hydrology, v. 340, no. 1-2, p. 48-62, https://doi.org/10.1016/j.jhydrol.2007.03.021.","startPage":"48","endPage":"62","numberOfPages":"15","costCenters":[],"links":[{"id":212745,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jhydrol.2007.03.021"},{"id":240281,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"340","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0feee4b0c8380cd53a86","contributors":{"authors":[{"text":"Comiti, F.","contributorId":82130,"corporation":false,"usgs":true,"family":"Comiti","given":"F.","email":"","affiliations":[],"preferred":false,"id":424658,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mao, L.","contributorId":64894,"corporation":false,"usgs":true,"family":"Mao","given":"L.","email":"","affiliations":[],"preferred":false,"id":424657,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wilcox, A.","contributorId":62834,"corporation":false,"usgs":true,"family":"Wilcox","given":"A.","email":"","affiliations":[],"preferred":false,"id":424655,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Wohl, E.E. 0000-0001-7435-5013","orcid":"https://orcid.org/0000-0001-7435-5013","contributorId":28753,"corporation":false,"usgs":true,"family":"Wohl","given":"E.E.","affiliations":[],"preferred":false,"id":424654,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Lenzi, M.A.","contributorId":63622,"corporation":false,"usgs":true,"family":"Lenzi","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":424656,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70029867,"text":"70029867 - 2007 - Developments in seismic monitoring for risk reduction","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029867","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2447,"text":"Journal of Risk Research","active":true,"publicationSubtype":{"id":10}},"title":"Developments in seismic monitoring for risk reduction","docAbstract":"This paper presents recent state-of-the-art developments to obtain displacements and drift ratios for seismic monitoring and damage assessment of buildings. In most cases, decisions on safety of buildings following seismic events are based on visual inspections of the structures. Real-time instrumental measurements using GPS or double integration of accelerations, however, offer a viable alternative. Relevant parameters, such as the type of connections and structural characteristics (including storey geometry), can be estimated to compute drifts corresponding to several pre-selected threshold stages of damage. Drift ratios determined from real-time monitoring can then be compared to these thresholds in order to estimate damage conditions drift ratios. This approach is demonstrated in three steel frame buildings in San Francisco, California. Recently recorded data of strong shaking from these buildings indicate that the monitoring system can be a useful tool in rapid assessment of buildings and other structures following an earthquake. Such systems can also be used for risk monitoring, as a method to assess performance-based design and analysis procedures, for long-term assessment of structural characteristics of a building, and as a possible long-term damage detection tool.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Risk Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1080/13669870701447964","issn":"13669877","usgsCitation":"Çelebi, M., 2007, Developments in seismic monitoring for risk reduction: Journal of Risk Research, v. 10, no. 5, p. 715-727, https://doi.org/10.1080/13669870701447964.","startPage":"715","endPage":"727","numberOfPages":"13","costCenters":[],"links":[{"id":212719,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1080/13669870701447964"},{"id":240247,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"10","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0089e4b0c8380cd4f7a5","contributors":{"authors":[{"text":"Çelebi, M.","contributorId":36946,"corporation":false,"usgs":true,"family":"Çelebi","given":"M.","affiliations":[],"preferred":false,"id":424653,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70029863,"text":"70029863 - 2007 - Using geochemistry as a tool for correlating proximal andesitic tephra: Case studies from Mt Rainier (USA) and Mt Ruapehu (New Zealand)","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029863","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2437,"text":"Journal of Quaternary Science","active":true,"publicationSubtype":{"id":10}},"title":"Using geochemistry as a tool for correlating proximal andesitic tephra: Case studies from Mt Rainier (USA) and Mt Ruapehu (New Zealand)","docAbstract":"Volcanic hazards assessments at andesite stratovolcanoes rely on the assessment of frequency and magnitude of past events. The identification and correlation of proximal and distal andesitic tephra, which record the explosive eruptive history, are integral to such assessments. These tephra are potentially valuable stratigraphic marker beds useful to the temporal correlation and age dating of Quaternary volcanic, volcaniclastic and epiclastic sedimentary deposits with which they are interbedded. At Mt Ruapehu (New Zealand) and Mt Rainier (USA), much of the detail of the recent volcanic record remains unresolved because of the difficulty in identifying proximal tephra. This study investigates the value of geochemical methods in discriminating andesitic tephra. Our dataset comprises petrological and geochemical analyses of tephra that span the late Quaternary eruptive record of each volcano. Our data illustrate that andesitic tephra are remarkably heterogeneous in composition. Tephra compositions fluctuate widely over short time intervals, and there are no simple or systematic temporal trends in geochemistry within either eruptive record. This complexity in tephra geochemistry limits the application of geochemical approaches to tephrostratigraphic studies, beyond a general characterisation useful to provenance assignation. Petrological and geochemical data suggest that the products of andesite systems are inherently variable and therefore intractable to discrimination by simple geochemical methods alone. Copyright ?? 2006 John Wiley & Sons, Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Quaternary Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/jqs.1065","issn":"02678179","usgsCitation":"Donoghue, S., Vallance, J., Smith, I., and Stewart, R., 2007, Using geochemistry as a tool for correlating proximal andesitic tephra: Case studies from Mt Rainier (USA) and Mt Ruapehu (New Zealand): Journal of Quaternary Science, v. 22, no. 4, p. 395-410, https://doi.org/10.1002/jqs.1065.","startPage":"395","endPage":"410","numberOfPages":"16","costCenters":[],"links":[{"id":212685,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/jqs.1065"},{"id":240210,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"22","issue":"4","noUsgsAuthors":false,"publicationDate":"2006-12-13","publicationStatus":"PW","scienceBaseUri":"505bc053e4b08c986b32a06d","contributors":{"authors":[{"text":"Donoghue, S.L.","contributorId":83741,"corporation":false,"usgs":true,"family":"Donoghue","given":"S.L.","email":"","affiliations":[],"preferred":false,"id":424644,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Vallance, J.","contributorId":41221,"corporation":false,"usgs":true,"family":"Vallance","given":"J.","email":"","affiliations":[],"preferred":false,"id":424642,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Smith, I.E.M.","contributorId":31983,"corporation":false,"usgs":true,"family":"Smith","given":"I.E.M.","email":"","affiliations":[],"preferred":false,"id":424641,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Stewart, R.B.","contributorId":67289,"corporation":false,"usgs":true,"family":"Stewart","given":"R.B.","email":"","affiliations":[],"preferred":false,"id":424643,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70029861,"text":"70029861 - 2007 - Long-term changes in abundance and diversity of macrophyte and waterfowl populations in an estuary with exotic macrophytes and improving water quality","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029861","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2620,"text":"Limnology and Oceanography","active":true,"publicationSubtype":{"id":10}},"title":"Long-term changes in abundance and diversity of macrophyte and waterfowl populations in an estuary with exotic macrophytes and improving water quality","docAbstract":"We assessed species-specific coverage (km2) of a submerged aquatic vegetation (SAV) community in the fresh and upper oligohaline Potomac Estuary from 1985 to 2001 using a method combining field observations of species-proportional coverage data with congruent remotely sensed coverage and density (percent canopy cover) data. Biomass (estimated by density-weighted coverage) of individual species was calculated. Under improving water quality conditions, exotic SAV species did not displace native SAV; rather, the percent of natives increased over time. While coverage-based diversity did fluctuate and increased, richness-based community turnover rates were not significantly different from zero. SAV diversity was negatively related to nitrogen concentration. Differences in functional traits, such as reproductive potential, between the dominant native and exotic species may explain some interannual patterns in SAV. Biomass of native, as well as exotic, SAV species varied with factors affecting water column light attenuation. We also show a positive response by a higher trophic level, waterfowl, to SAV communities dominated by exotic SAV from 1959 to 2001. ?? 2007, by the American Society of Limnology and Oceanography, Inc.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Limnology and Oceanography","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00243590","usgsCitation":"Rybicki, N.B., and Landwehr, J., 2007, Long-term changes in abundance and diversity of macrophyte and waterfowl populations in an estuary with exotic macrophytes and improving water quality: Limnology and Oceanography, v. 52, no. 3, p. 1195-1207.","startPage":"1195","endPage":"1207","numberOfPages":"13","costCenters":[],"links":[{"id":240178,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"52","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a497be4b0c8380cd68647","contributors":{"authors":[{"text":"Rybicki, N. B.","contributorId":97504,"corporation":false,"usgs":true,"family":"Rybicki","given":"N.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":424636,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Landwehr, J.M.","contributorId":39815,"corporation":false,"usgs":true,"family":"Landwehr","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":424635,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029859,"text":"70029859 - 2007 - Numerical dating of a Late Quaternary spit-shoreline complex at the northern end of Silver Lake playa, Mojave Desert, California: A comparison of the applicability of radiocarbon, luminescence, terrestrial cosmogenic nuclide, electron spin resonance, U-series and amino acid racemization methods","interactions":[],"lastModifiedDate":"2012-03-12T17:21:35","indexId":"70029859","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3217,"text":"Quaternary International","active":true,"publicationSubtype":{"id":10}},"title":"Numerical dating of a Late Quaternary spit-shoreline complex at the northern end of Silver Lake playa, Mojave Desert, California: A comparison of the applicability of radiocarbon, luminescence, terrestrial cosmogenic nuclide, electron spin resonance, U-series and amino acid racemization methods","docAbstract":"A Late Quaternary spit-shoreline complex on the northern shore of Pleistocene Lake Mojave of southeastern California, USA was studied with the goal of comparing accelerator mass spectrometry (AMS) radiocarbon, luminescence, electron spin resonance (ESR), terrestrial cosmogenic radionuclide (TCN) surface exposure, amino acid racemization (AAR) and U-series dating methods. The pattern of ages obtained by the different methods illustrates the complexity of processes acting in the lakeshore environment and highlights the utility of a multi-method approach. TCN surface exposure ages (mostly ???20-30 ka) record the initial erosion of shoreline benches, whereas radiocarbon ages on shells (determined in this and previous studies) within the spit, supported by AAR data, record its construction at fluctuating lake levels from ???16 to 10 ka. Luminescence ages on spit sediment (???6-7 ka) and ESR ages on spit shells (???4 ka) are anomalously young relative to radiocarbon ages of shells within the same deposits. The significance of the surprisingly young luminescence ages is not clear. The younger ESR ages could be a consequence of post-mortem enrichment of U in the shells. High concentrations of detrital thorium in tufa coating spit gravels inhibited the use of single-sample U-series dating. Detailed comparisons such as this provide one of the few means of assessing the accuracy of Quaternary dating techniques. More such comparisons are needed. ?? 2007 Elsevier Ltd and INQUA.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Quaternary International","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.quaint.2007.01.001","issn":"10406182","usgsCitation":"Owen, L., Bright, J., Finkel, R., Jaiswal, M., Kaufman, D.S., Mahan, S., Radtke, U., Schneider, J., Sharp, W., Singhvi, A., and Warren, C., 2007, Numerical dating of a Late Quaternary spit-shoreline complex at the northern end of Silver Lake playa, Mojave Desert, California: A comparison of the applicability of radiocarbon, luminescence, terrestrial cosmogenic nuclide, electron spin resonance, U-series and amino acid racemization methods: Quaternary International, v. 166, no. 1, p. 87-110, https://doi.org/10.1016/j.quaint.2007.01.001.","startPage":"87","endPage":"110","numberOfPages":"24","costCenters":[],"links":[{"id":213093,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.quaint.2007.01.001"},{"id":240682,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"166","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a68ebe4b0c8380cd73a82","contributors":{"authors":[{"text":"Owen, L.A.","contributorId":94836,"corporation":false,"usgs":true,"family":"Owen","given":"L.A.","email":"","affiliations":[],"preferred":false,"id":424631,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bright, Jordon","contributorId":63981,"corporation":false,"usgs":false,"family":"Bright","given":"Jordon","affiliations":[{"id":7042,"text":"University of Arizona","active":true,"usgs":false}],"preferred":false,"id":424628,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Finkel, R.C.","contributorId":79677,"corporation":false,"usgs":true,"family":"Finkel","given":"R.C.","email":"","affiliations":[],"preferred":false,"id":424630,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jaiswal, M.K.","contributorId":18183,"corporation":false,"usgs":true,"family":"Jaiswal","given":"M.K.","email":"","affiliations":[],"preferred":false,"id":424624,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Kaufman, D. S.","contributorId":18006,"corporation":false,"usgs":false,"family":"Kaufman","given":"D.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":424623,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Mahan, S.","contributorId":98894,"corporation":false,"usgs":true,"family":"Mahan","given":"S.","email":"","affiliations":[],"preferred":false,"id":424632,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Radtke, U.","contributorId":9003,"corporation":false,"usgs":true,"family":"Radtke","given":"U.","email":"","affiliations":[],"preferred":false,"id":424622,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Schneider, J.S.","contributorId":57271,"corporation":false,"usgs":true,"family":"Schneider","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":424626,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Sharp, W.","contributorId":52402,"corporation":false,"usgs":true,"family":"Sharp","given":"W.","affiliations":[],"preferred":false,"id":424625,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Singhvi, A.K.","contributorId":64435,"corporation":false,"usgs":true,"family":"Singhvi","given":"A.K.","email":"","affiliations":[],"preferred":false,"id":424629,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Warren, C.N.","contributorId":63340,"corporation":false,"usgs":true,"family":"Warren","given":"C.N.","email":"","affiliations":[],"preferred":false,"id":424627,"contributorType":{"id":1,"text":"Authors"},"rank":11}]}}
,{"id":70029846,"text":"70029846 - 2007 - Occurrence of oral deformities in larval anurans","interactions":[],"lastModifiedDate":"2015-12-10T11:02:20","indexId":"70029846","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1337,"text":"Copeia","active":true,"publicationSubtype":{"id":10}},"title":"Occurrence of oral deformities in larval anurans","docAbstract":"<p>We quantified deformities in the marginal papillae, tooth rows, and jaw sheaths of tadpoles from 13 population samples representing three families and 11 sites in the southeastern United States. Oral deformities were observed in all samples and in 13.5-98% of the specimens per sample. Batrachochytrium dendrobatidis (chytrid) infections were detected in three samples. There was high variability among samples in the pattern and number of discovered deformities. Pairwise associations between oral structures containing deformities were nonrandom for several populations, especially those with B. dendrobatidis infections or high total numbers of deformities. Comparisons of deformities among samples using multivariate analyses revealed that tadpole samples grouped together by family. Analyses of ordination indicated that three variables, the number of deformities, the number of significant associations among deformity types within populations, and whether populations were infected with B. dendrobatidis, were significantly correlated with the pattern of deformities. Our data indicate that the incidence of oral deformities can be high in natural populations and that phylogeny and B. dendrobatidis infection exert a strong influence on the occurrence and type of oral deformities in tadpoles. ?? by the American Society of Ichthyologists and Herperologists.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Copeia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1643/0045-8511(2007)7[449:OOODIL]2.0.CO;2","issn":"00458511","usgsCitation":"Drake, D., Altig, R., Grace, J., and Walls, S., 2007, Occurrence of oral deformities in larval anurans: Copeia, no. 2, p. 449-458, https://doi.org/10.1643/0045-8511(2007)7[449:OOODIL]2.0.CO;2.","productDescription":"10 p.","startPage":"449","endPage":"458","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":240453,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6bfce4b0c8380cd749da","contributors":{"authors":[{"text":"Drake, D.L.","contributorId":82133,"corporation":false,"usgs":true,"family":"Drake","given":"D.L.","email":"","affiliations":[],"preferred":false,"id":424569,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Altig, R.","contributorId":44259,"corporation":false,"usgs":true,"family":"Altig","given":"R.","email":"","affiliations":[],"preferred":false,"id":424568,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Grace, J.B. 0000-0001-6374-4726","orcid":"https://orcid.org/0000-0001-6374-4726","contributorId":38938,"corporation":false,"usgs":true,"family":"Grace","given":"J.B.","affiliations":[],"preferred":false,"id":424567,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Walls, S.C. 0000-0001-7391-9155","orcid":"https://orcid.org/0000-0001-7391-9155","contributorId":98273,"corporation":false,"usgs":true,"family":"Walls","given":"S.C.","affiliations":[],"preferred":false,"id":424570,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70029843,"text":"70029843 - 2007 - Porphyry copper deposit tract definition - A global analysis comparing geologic map scales","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029843","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2832,"text":"Natural Resources Research","onlineIssn":"1573-8981","printIssn":"1520-7439","active":true,"publicationSubtype":{"id":10}},"title":"Porphyry copper deposit tract definition - A global analysis comparing geologic map scales","docAbstract":"Geologic maps are a fundamental data source used to define mineral-resource potential tracts for the first step of a mineral resource assessment. Further, it is generally believed that the scale of the geologic map is a critical consideration. Previously published research has demonstrated that the U.S. Geological Survey porphyry tracts identified for the United States, which are based on 1:500,000-scale geology and larger scale data and published at 1:1,000,000 scale, can be approximated using a more generalized 1:2,500,000-scale geologic map. Comparison of the USGS porphyry tracts for the United States with weights-of-evidence models made using a 1:10,000,000-scale geologic map, which was made for petroleum applications, and a 1:35,000,000-scale geologic map, which was created as context for the distribution of porphyry deposits, demonstrates that, again, the USGS US porphyry tracts identified are similar to tracts defined on features from these small scale maps. In fact, the results using the 1:35,000,000-scale map show a slightly higher correlation with the USGS US tract definition, probably because the conceptual context for this small-scale map is more appropriate for porphyry tract definition than either of the other maps. This finding demonstrates that geologic maps are conceptual maps. The map information shown in each map is selected and generalized for the map to display the concepts deemed important for the map maker's purpose. Some geologic maps of small scale prove to be useful for regional mineral-resource tract definition, despite the decrease in spatial accuracy with decreasing scale. The utility of a particular geologic map for a particular application is critically dependent on the alignment of the intention of the map maker with the application. ?? International Association for Mathematical Geology 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Natural Resources Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s11053-007-9042-9","issn":"15207439","usgsCitation":"Raines, G.L., Connors, K., and Chorlton, L., 2007, Porphyry copper deposit tract definition - A global analysis comparing geologic map scales: Natural Resources Research, v. 16, no. 2, p. 191-198, https://doi.org/10.1007/s11053-007-9042-9.","startPage":"191","endPage":"198","numberOfPages":"8","costCenters":[],"links":[{"id":212864,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s11053-007-9042-9"},{"id":240421,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-05-16","publicationStatus":"PW","scienceBaseUri":"505a7de6e4b0c8380cd7a219","contributors":{"authors":[{"text":"Raines, G. L.","contributorId":90720,"corporation":false,"usgs":true,"family":"Raines","given":"G.","middleInitial":"L.","affiliations":[],"preferred":false,"id":424562,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Connors, K.A.","contributorId":60024,"corporation":false,"usgs":true,"family":"Connors","given":"K.A.","email":"","affiliations":[],"preferred":false,"id":424561,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Chorlton, L.B.","contributorId":40806,"corporation":false,"usgs":true,"family":"Chorlton","given":"L.B.","email":"","affiliations":[],"preferred":false,"id":424560,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029842,"text":"70029842 - 2007 - Peptidomic analysis of skin secretions supports separate species status for the tailed frogs, <i>Ascaphus truei</i> and <i>Ascaphus montanus</i>","interactions":[],"lastModifiedDate":"2017-05-06T16:10:29","indexId":"70029842","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1290,"text":"Comparative Biochemistry and Physiology, Part D: Genomics and Proteomics","active":true,"publicationSubtype":{"id":10}},"title":"Peptidomic analysis of skin secretions supports separate species status for the tailed frogs, <i>Ascaphus truei</i> and <i>Ascaphus montanus</i>","docAbstract":"<p>The tailed frog <i>Ascaphus truei</i> Stejneger, 1899 is the most primitive extant anuran and the sister taxon to the clade of all other living frogs. The species occupies two disjunct ranges in the Northwest region of North America: the Cascade Mountains and coastal area from British Columbia to Northern California, and an inland range in the northern Rocky Mountains and the Blue and Wallowa mountains. A previous study led to the isolation of eight peptides with antimicrobial activity (termed the ascaphins) from skin secretions of <i>A. truei</i> from the coastal range. The present study has used peptidomic analysis to identify the products of orthologous ascaphin genes in electrically-stimulated skin secretions from inland range specimens. Structural characterization of the peptides demonstrated that ascaphins from the inland range contained the following amino acid substitutions compared with orthologs from the coastal range frogs: ascaphin-1 (Ala<sup>12</sup>&nbsp;→&nbsp;Glu), ascaphin-3 (Asp<sup>4</sup>&nbsp;→&nbsp;Glu), ascaphin-4 (Ala<sup>19</sup>&nbsp;→&nbsp;Ser), ascaphin-5 (Lys<sup>12</sup>&nbsp;→&nbsp;Thr), and ascaphin-7 (Gly<sup>8</sup>&nbsp;→&nbsp;Ser and Ser<sup>20</sup>&nbsp;→&nbsp;Asn). Orthologs of ascaphins-2, -6, and -8 were not identified but a paralog of ascaphin-5, identical to ascaphin-5 from coastal range frogs, was found. The data support the claims, derived from analysis of the nucleotide sequences of mitochondrial genes, that the inland populations of the tailed frog should be recognized as a distinct species, the Rocky Mountain tailed frog <i>Ascaphus montanus</i> and that the divergence of the species from <i>A. truei</i> probably occurred in the late Miocene (approximately 10&nbsp;Mya).</p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.cbd.2007.01.003","issn":"1744117X","usgsCitation":"Conlon, J., Bevier, C., Coquet, L., Leprince, J., Jouenne, T., Vaudry, H., and Hossack, B., 2007, Peptidomic analysis of skin secretions supports separate species status for the tailed frogs, <i>Ascaphus truei</i> and <i>Ascaphus montanus</i>: Comparative Biochemistry and Physiology, Part D: Genomics and Proteomics, v. 2, no. 2, p. 121-125, https://doi.org/10.1016/j.cbd.2007.01.003.","productDescription":"5 p.","startPage":"121","endPage":"125","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"links":[{"id":240387,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"2","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a765fe4b0c8380cd7809a","contributors":{"authors":[{"text":"Conlon, J.M.","contributorId":68964,"corporation":false,"usgs":true,"family":"Conlon","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":424556,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bevier, C.R.","contributorId":65288,"corporation":false,"usgs":true,"family":"Bevier","given":"C.R.","email":"","affiliations":[],"preferred":false,"id":424555,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Coquet, L.","contributorId":35547,"corporation":false,"usgs":true,"family":"Coquet","given":"L.","email":"","affiliations":[],"preferred":false,"id":424554,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Leprince, J.","contributorId":82530,"corporation":false,"usgs":true,"family":"Leprince","given":"J.","email":"","affiliations":[],"preferred":false,"id":424557,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Jouenne, T.","contributorId":83338,"corporation":false,"usgs":true,"family":"Jouenne","given":"T.","email":"","affiliations":[],"preferred":false,"id":424558,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Vaudry, H.","contributorId":94102,"corporation":false,"usgs":true,"family":"Vaudry","given":"H.","email":"","affiliations":[],"preferred":false,"id":424559,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Hossack, B. R.","contributorId":10756,"corporation":false,"usgs":true,"family":"Hossack","given":"B. R.","affiliations":[],"preferred":false,"id":424553,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70029840,"text":"70029840 - 2007 - Temporal changes in surface-water insecticide concentrations after the phaseout of diazinon and chlorpyrifos","interactions":[],"lastModifiedDate":"2020-09-10T16:36:03.870789","indexId":"70029840","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Temporal changes in surface-water insecticide concentrations after the phaseout of diazinon and chlorpyrifos","docAbstract":"<p><span>The recent (late 2001) federally mandated phaseout of diazinon and chlorpyrifos insecticide use in outdoor urban settings has resulted in a rapid decline in concentrations of these insecticides in urban streams and rivers in the northeastern and midwestern United States. Assessment of temporal insecticide trends at 20 sites showed that significant step decreases in diazinon concentrations occurred at 90% of the sites after the phaseout, with concentrations generally decreasing by over 50% in summer samples. Chlorpyrifos concentrations showed significant step decreases in at least 1 season at 3 of the 4 sites with sufficient data for analysis. The decrease in diazinon concentrations in response to the phaseout resulted in a decline in the frequency of concentrations exceeding the acute invertebrate water-quality benchmark of 0.1 μg/L from 10% of pre-phaseout summer samples to fewer than 1% of post-phaseout summer samples. Although some studies have indicated an increase in concentrations of carbaryl in response to the organophosphorous phaseout, carbaryl concentrations only increased at 1 site after the phaseout. A full assessment of the effect of the phaseout of diazinon and chlorpyrifos on surface water will require data on other insecticides used to replace these compounds.</span></p>","language":"English","publisher":"ACS Publications","doi":"10.1021/es070301","usgsCitation":"Phillips, P.J., Ator, S., and Nystrom, E., 2007, Temporal changes in surface-water insecticide concentrations after the phaseout of diazinon and chlorpyrifos: Environmental Science & Technology, v. 41, no. 12, p. 4246-4251, https://doi.org/10.1021/es070301.","productDescription":"6 p.","startPage":"4246","endPage":"4251","numberOfPages":"6","costCenters":[],"links":[{"id":240351,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"41","issue":"12","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba503e4b08c986b320742","contributors":{"authors":[{"text":"Phillips, P. J.","contributorId":31728,"corporation":false,"usgs":true,"family":"Phillips","given":"P.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":424546,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ator, S.W. 0000-0002-9186-4837","orcid":"https://orcid.org/0000-0002-9186-4837","contributorId":104100,"corporation":false,"usgs":true,"family":"Ator","given":"S.W.","affiliations":[],"preferred":false,"id":424548,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nystrom, E.A.","contributorId":85749,"corporation":false,"usgs":true,"family":"Nystrom","given":"E.A.","email":"","affiliations":[],"preferred":false,"id":424547,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029829,"text":"70029829 - 2007 - Tag return models allowing for harvest and catch and release: Evidence of environmental and management impacts on striped bass fishing and natural mortality rates","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029829","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2886,"text":"North American Journal of Fisheries Management","active":true,"publicationSubtype":{"id":10}},"title":"Tag return models allowing for harvest and catch and release: Evidence of environmental and management impacts on striped bass fishing and natural mortality rates","docAbstract":"Catch-and-release fisheries have become very important in the management of overexploited recreational fish stocks. Tag return studies, where the tag is removed regardless of fish disposition, have been used to assess the effectiveness of restoration efforts for these fisheries. We extend the instantaneous rate formulation of tag return models to allow for catch and release as well as harvest. The key point of our methods is that, given an estimate of the tag reporting rate, the fishing mortality rate (F) is separated into two components: the mortality on harvested fish and the \"mortality\" on tags (because the lags are removed) of fish released alive. The total fishing mortality rate for untagged fish is the sum of the Fs due to harvest and hooking mortality suffered by fish released alive. Natural mortality rates can also be estimated. Both age-independent models and age-dependent models are constructed, and the age-dependent models are illustrated by application to data from a study of striped bass Morone saxatilis in Chesapeake Bay from 1991 to 2003 by the Maryland Department of Natural Resources. By fitting models of the natural mortality rate with limited age and year dependence, we demonstrate an overall decrease in natural mortality rates as fish age and provide evidence of an increase in natural mortality beginning in the late 1990s, when an outbreak of the disease mycobacteriosis is thought to have begun. Our results indicate that fishing mortality is age dependent; selectivity increases up to age 6, when fish appear to be fully recruited to the fishery. There is also evidence of an increase in fishing mortality since 1995, when regulations were relaxed. ?? Copyright by the American Fisheries Society 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"North American Journal of Fisheries Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1577/M06-089.1","issn":"02755947","usgsCitation":"Jiang, H., Pollock, K.H., Brownie, C., Hoenig, J., Latour, R., Wells, B., and Hightower, J., 2007, Tag return models allowing for harvest and catch and release: Evidence of environmental and management impacts on striped bass fishing and natural mortality rates: North American Journal of Fisheries Management, v. 27, no. 2, p. 387-396, https://doi.org/10.1577/M06-089.1.","startPage":"387","endPage":"396","numberOfPages":"10","costCenters":[],"links":[{"id":212655,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/M06-089.1"},{"id":240176,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-05-01","publicationStatus":"PW","scienceBaseUri":"505ba3b6e4b08c986b31fe38","contributors":{"authors":[{"text":"Jiang, H.","contributorId":83731,"corporation":false,"usgs":true,"family":"Jiang","given":"H.","affiliations":[],"preferred":false,"id":424510,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pollock, K. H.","contributorId":65184,"corporation":false,"usgs":false,"family":"Pollock","given":"K.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":424509,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Brownie, C.","contributorId":43463,"corporation":false,"usgs":true,"family":"Brownie","given":"C.","affiliations":[],"preferred":false,"id":424507,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hoenig, J.M.","contributorId":54007,"corporation":false,"usgs":true,"family":"Hoenig","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":424508,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Latour, R.J.","contributorId":10620,"corporation":false,"usgs":true,"family":"Latour","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":424505,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Wells, B.K.","contributorId":91303,"corporation":false,"usgs":true,"family":"Wells","given":"B.K.","email":"","affiliations":[],"preferred":false,"id":424511,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Hightower, J.E.","contributorId":16605,"corporation":false,"usgs":true,"family":"Hightower","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":424506,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70029819,"text":"70029819 - 2007 - Oxygen and chlorine isotopic fractionation during perchlorate biodegradation: Laboratory results and implications for forensics and natural attenuation studies","interactions":[],"lastModifiedDate":"2018-10-17T10:33:55","indexId":"70029819","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Oxygen and chlorine isotopic fractionation during perchlorate biodegradation: Laboratory results and implications for forensics and natural attenuation studies","docAbstract":"<p><span>Perchlorate is a widespread environmental contaminant having both anthropogenic and natural sources. Stable isotope ratios of O and Cl in a given sample of perchlorate may be used to distinguish its source(s). Isotopic ratios may also be useful for identifying the extent of biodegradation of perchlorate, which is critical for assessing natural attenuation of this contaminant in groundwater. For this approach to be useful, however, the kinetic isotopic fractionations of O and Cl during perchlorate biodegradation must first be determined as a function of environmental variables such as temperature and bacterial species. A laboratory study was performed in which the O and Cl isotope ratios of perchlorate were monitored as a function of degradation by two separate bacterial strains (</span><i>Azospira suillum</i><span>&nbsp;JPLRND and&nbsp;</span><i>Dechlorospirillum</i><span>&nbsp;sp. FBR2) at both 10 °C and 22 °C with acetate as the electron donor. Perchlorate was completely reduced by both strains within 280 h at 22 °C and 615 h at 10 °C. Measured values of isotopic fractionation factors were ε</span><sup>18</sup><span>O = −36.6 to −29.0‰ and ε</span><sup>37</sup><span>Cl = −14.5 to −11.5‰, and these showed no apparent systematic variation with either temperature or bacterial strain. An experiment using&nbsp;</span><sup>18</sup><span>O-enriched water (δ</span><sup>18</sup><span>O = +198‰) gave results indistinguishable from those observed in the isotopically normal water (δ</span><sup>18</sup><span>O = −8.1‰) used in the other experiments, indicating negligible isotope exchange between perchlorate and water during biodegradation. The fractionation factor ratio ε</span><sup>18</sup><span>O/ε</span><sup>37</sup><span>Cl was nearly invariant in all experiments at 2.50 ± 0.04. These data indicate that isotope ratio analysis will be useful for documenting perchlorate biodegradation in soils and groundwater. The establishment of a microbial fractionation factor ratio (ε</span><sup>18</sup><span>O/ε</span><sup>37</sup><span>Cl) also has significant implications for forensic studies.</span></p>","language":"English","publisher":"ACS","doi":"10.1021/es0621849","issn":"0013936X","usgsCitation":"Sturchio, N.C., Bohlke, J.K., Beloso, A.D., Streger, S., Heraty, L.J., and Hatzinger, P., 2007, Oxygen and chlorine isotopic fractionation during perchlorate biodegradation: Laboratory results and implications for forensics and natural attenuation studies: Environmental Science & Technology, v. 41, no. 8, p. 2796-2802, https://doi.org/10.1021/es0621849.","productDescription":"7 p.","startPage":"2796","endPage":"2802","numberOfPages":"7","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240581,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213002,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1021/es0621849"}],"volume":"41","issue":"8","noUsgsAuthors":false,"publicationDate":"2007-02-28","publicationStatus":"PW","scienceBaseUri":"505a727ce4b0c8380cd76b14","contributors":{"authors":[{"text":"Sturchio, Neil C.","contributorId":88188,"corporation":false,"usgs":true,"family":"Sturchio","given":"Neil","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":424463,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bohlke, John Karl 0000-0001-5693-6455 jkbohlke@usgs.gov","orcid":"https://orcid.org/0000-0001-5693-6455","contributorId":127841,"corporation":false,"usgs":true,"family":"Bohlke","given":"John","email":"jkbohlke@usgs.gov","middleInitial":"Karl","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":false,"id":424464,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Beloso, Abelardo D. Jr.","contributorId":15016,"corporation":false,"usgs":true,"family":"Beloso","given":"Abelardo","suffix":"Jr.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":424462,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Streger, S.H.","contributorId":6263,"corporation":false,"usgs":true,"family":"Streger","given":"S.H.","email":"","affiliations":[],"preferred":false,"id":424459,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Heraty, Linnea J.","contributorId":192520,"corporation":false,"usgs":false,"family":"Heraty","given":"Linnea","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":424460,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Hatzinger, Paul B.","contributorId":43204,"corporation":false,"usgs":true,"family":"Hatzinger","given":"Paul B.","affiliations":[],"preferred":false,"id":424461,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70029813,"text":"70029813 - 2007 - Progress in the development of shallow-water mapping systems","interactions":[],"lastModifiedDate":"2018-02-06T10:14:12","indexId":"70029813","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3363,"text":"Sea Technology","active":true,"publicationSubtype":{"id":10}},"title":"Progress in the development of shallow-water mapping systems","docAbstract":"The USGS (US Geological Survey) Coastal and Marine Geology has deployed an advance autonomous shallow-draft robotic vehicle, Iris, for shallow-water mapping in Apalachicola Bay, Florida. The vehicle incorporates a side scan sonar system, seismic-reflection profiler, single-beam echosounder, and global positioning system (GPS) navigation. It is equipped with an onboard microprocessor-based motor controller, delivering signals for speed and steering to hull-mounted brushless direct-current thrusters. An onboard motion sensor in the Sea Robotics vehicle control system enclosure has been integrated in the vehicle to measure the vehicle heave, pitch, roll, and heading. Three water-tight enclosures are mounted along the vehicle axis for the Edgetech computer and electronics system including the Sea Robotics computer, a control and wireless communications system, and a Thales ZXW real-time kinematic (RTK) GPS receiver. The vehicle has resulted in producing high-quality seismic reflection and side scan sonar data, which will help in developing the baseline oyster habitat maps.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Sea Technology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00933651","usgsCitation":"Bergeron, E., Worley, C., and O'Brien, T., 2007, Progress in the development of shallow-water mapping systems: Sea Technology, v. 48, no. 6, p. 10-15.","productDescription":"6 p.","startPage":"10","endPage":"15","numberOfPages":"6","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true},{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":240486,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"48","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a8e6fe4b0c8380cd7f1c4","contributors":{"authors":[{"text":"Bergeron, E.","contributorId":94103,"corporation":false,"usgs":true,"family":"Bergeron","given":"E.","email":"","affiliations":[],"preferred":false,"id":424437,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Worley, C.R.","contributorId":43479,"corporation":false,"usgs":true,"family":"Worley","given":"C.R.","email":"","affiliations":[],"preferred":false,"id":424435,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"O'Brien, T.","contributorId":46767,"corporation":false,"usgs":true,"family":"O'Brien","given":"T.","affiliations":[],"preferred":false,"id":424436,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
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