Thirty gravid, female shovelnose sturgeon (Scaphirhynchus platorynchus) were captured in the Lower Missouri River in March 2004 to evaluate the effectiveness of physiology, telemetry and remote sensor technology coupled with change point analysis in identifying when and where Scaphirhynchus sturgeon spawn. Captured sturgeons were instrumented with ultrasonic transmitters and with archival data storage tags (DST) that recorded temperature and pressure. Female sturgeon were tracked through the suspected spawning period. Thereafter, attempts were made to recapture fish to evaluate spawning success. At the time of transmitter implantation, blood and an ovarian biopsy were taken. Reproductive hormones and cortisol were measured in blood. Polarization indices and germinal vesicle breakdown were assessed on the biopsied oocytes to determine readiness to spawn. Behavioral data collected using telemetry and DST sensors were used to determine the direction and magnitude of possible spawning-related movements and to identify the timing of potential spawning events. Upon recapture observations of the ovaries and blood chemistry provided measures of spawning success and comparative indicators to explain differences in observed behavior. Behavioral and physiological indicators of spawning interpreted along with environmental measures may assist in the determination of variables that may cue sturgeon reproduction and the conditions under which sturgeon successfully spawn.
","language":"English","publisher":"Wiley","doi":"10.1111/j.1439-0426.2007.00894.x","issn":"01758659","usgsCitation":"DeLonay, A., Papoulias, D., Wildhaber, M., Annis, M., Bryan, J., Griffith, S., Holan, S., and Tillitt, D.E., 2007, Use of behavioral and physiological indicators to evaluate Scaphirhynchus sturgeon spawning success: Journal of Applied Ichthyology, v. 23, no. 4, p. 428-435, https://doi.org/10.1111/j.1439-0426.2007.00894.x.","productDescription":"8 p.","startPage":"428","endPage":"435","costCenters":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"links":[{"id":477035,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1439-0426.2007.00894.x","text":"Publisher Index Page"},{"id":239000,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bbec4e4b08c986b329796","contributors":{"authors":[{"text":"DeLonay, A. J. 0000-0002-3752-2799","orcid":"https://orcid.org/0000-0002-3752-2799","contributorId":34246,"corporation":false,"usgs":true,"family":"DeLonay","given":"A. J.","affiliations":[],"preferred":false,"id":429224,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Papoulias, D. M. 0000-0002-5106-2469","orcid":"https://orcid.org/0000-0002-5106-2469","contributorId":58759,"corporation":false,"usgs":true,"family":"Papoulias","given":"D. M.","affiliations":[],"preferred":false,"id":429226,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wildhaber, M. L. 0000-0002-6538-9083","orcid":"https://orcid.org/0000-0002-6538-9083","contributorId":62961,"corporation":false,"usgs":true,"family":"Wildhaber","given":"M. L.","affiliations":[],"preferred":false,"id":429227,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Annis, M.L.","contributorId":53930,"corporation":false,"usgs":true,"family":"Annis","given":"M.L.","email":"","affiliations":[],"preferred":false,"id":429225,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Bryan, J.L.","contributorId":15328,"corporation":false,"usgs":true,"family":"Bryan","given":"J.L.","email":"","affiliations":[],"preferred":false,"id":429223,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Griffith, S.A.","contributorId":101866,"corporation":false,"usgs":true,"family":"Griffith","given":"S.A.","email":"","affiliations":[],"preferred":false,"id":429230,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Holan, S. H.","contributorId":76453,"corporation":false,"usgs":false,"family":"Holan","given":"S. H.","affiliations":[],"preferred":false,"id":429228,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Tillitt, D. E.","contributorId":83462,"corporation":false,"usgs":true,"family":"Tillitt","given":"D.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":429229,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ,{"id":70031154,"text":"70031154 - 2007 - River and riparian restoration in the southwest: Results of the National River Restoration Science Synthesis project","interactions":[],"lastModifiedDate":"2012-03-12T17:21:01","indexId":"70031154","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3271,"text":"Restoration Ecology","active":true,"publicationSubtype":{"id":10}},"title":"River and riparian restoration in the southwest: Results of the National River Restoration Science Synthesis project","docAbstract":"Restoration activity has exponentially increased across the Southwest since 1990. Over 37,000 records were compiled into the National River Restoration Science Synthesis (NRRSS) database to summarize restoration trends and assess project effectiveness. We analyzed data from 576 restoration projects in the Southwest (NRRSS-SW). More than 50% of projects were less than or equal to 3 km in length. The most common restoration project intent categories were riparian management, water quality management, in-stream habitat improvement, and flow modification. Common project activities were well matched to goals. Conservative estimates of total restoration costs exceeded $500 million. Most restoration dollars have been allocated to flow modification and water quality management. Monitoring was linked to 28% of projects across the Southwest, as opposed to just 10% nationwide. Mean costs were statistically similar whether or not projects were monitored. Results from 48 telephone interviews provided validation of NRRSS-SW database analyses but showed that project costs are often underreported within existing datasets. The majority of interviewees considered their projects to be successful, most often based upon observed improvements to biota or positive public reaction rather than evaluation of field data. The efficacy of restoration is difficult to ascertain given the dearth of information contained within most datasets. There is a great need for regional entities that not only track information on project implementation but also maintain and analyze monitoring data associated with restoration. Agencies that fund or regulate restoration should reward projects that emphasize monitoring and evaluation as much as project implementation. ?? 2007 Society for Ecological Restoration International.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Restoration Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1526-100X.2007.00250.x","issn":"10612971","usgsCitation":"Follstad, S.J., Dahm, C., Gloss, S., and Bernhardt, E.S., 2007, River and riparian restoration in the southwest: Results of the National River Restoration Science Synthesis project: Restoration Ecology, v. 15, no. 3, p. 550-562, https://doi.org/10.1111/j.1526-100X.2007.00250.x.","startPage":"550","endPage":"562","numberOfPages":"13","costCenters":[],"links":[{"id":211677,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1526-100X.2007.00250.x"},{"id":239015,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"15","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-07-26","publicationStatus":"PW","scienceBaseUri":"505aada0e4b0c8380cd86f34","contributors":{"authors":[{"text":"Follstad, Shah J.J.","contributorId":62016,"corporation":false,"usgs":true,"family":"Follstad","given":"Shah","email":"","middleInitial":"J.J.","affiliations":[],"preferred":false,"id":430277,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dahm, Clifford N.","contributorId":22730,"corporation":false,"usgs":false,"family":"Dahm","given":"Clifford N.","affiliations":[{"id":7000,"text":"Department of Biology, University of New Mexico","active":true,"usgs":false}],"preferred":false,"id":430276,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gloss, S.P.","contributorId":107926,"corporation":false,"usgs":true,"family":"Gloss","given":"S.P.","email":"","affiliations":[],"preferred":false,"id":430279,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bernhardt, E. S.","contributorId":95682,"corporation":false,"usgs":false,"family":"Bernhardt","given":"E.","email":"","middleInitial":"S.","affiliations":[{"id":12643,"text":"Duke University","active":true,"usgs":false}],"preferred":false,"id":430278,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70031311,"text":"70031311 - 2007 - Predicting wetland plant community responses to proposed water-level-regulation plans for Lake Ontario: GIS-based modeling","interactions":[],"lastModifiedDate":"2016-04-28T13:47:36","indexId":"70031311","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2330,"text":"Journal of Great Lakes Research","active":true,"publicationSubtype":{"id":10}},"title":"Predicting wetland plant community responses to proposed water-level-regulation plans for Lake Ontario: GIS-based modeling","docAbstract":"Integrated, GIS-based, wetland predictive models were constructed to assist in predicting the responses of wetland plant communities to proposed new water-level regulation plans for Lake Ontario. The modeling exercise consisted of four major components: 1) building individual site wetland geometric models; 2) constructing generalized wetland geometric models representing specific types of wetlands (rectangle model for drowned river mouth wetlands, half ring model for open embayment wetlands, half ellipse model for protected embayment wetlands, and ellipse model for barrier beach wetlands); 3) assigning wetland plant profiles to the generalized wetland geometric models that identify associations between past flooding / dewatering events and the regulated water-level changes of a proposed water-level-regulation plan; and 4) predicting relevant proportions of wetland plant communities and the time durations during which they would be affected under proposed regulation plans. Based on this conceptual foundation, the predictive models were constructed using bathymetric and topographic wetland models and technical procedures operating on the platform of ArcGIS. An example of the model processes and outputs for the drowned river mouth wetland model using a test regulation plan illustrates the four components and, when compared against other test regulation plans, provided results that met ecological expectations. The model results were also compared to independent data collected by photointerpretation. Although data collections were not directly comparable, the predicted extent of meadow marsh in years in which photographs were taken was significantly correlated with extent of mapped meadow marsh in all but barrier beach wetlands. The predictive model for wetland plant communities provided valuable input into International Joint Commission deliberations on new regulation plans and was also incorporated into faunal predictive models used for that purpose.
","language":"English","publisher":"International Association for Great Lakes Research","doi":"10.3394/0380-1330(2007)33[751:PWPCRT]2.0.CO;2","issn":"03801330","usgsCitation":"Wilcox, D., and Xie, Y., 2007, Predicting wetland plant community responses to proposed water-level-regulation plans for Lake Ontario: GIS-based modeling: Journal of Great Lakes Research, v. 33, no. 4, p. 751-773, https://doi.org/10.3394/0380-1330(2007)33[751:PWPCRT]2.0.CO;2.","productDescription":"23 p.","startPage":"751","endPage":"773","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":477141,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://hdl.handle.net/20.500.12648/2290","text":"External Repository"},{"id":239951,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212461,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3394/0380-1330(2007)33[751:PWPCRT]2.0.CO;2"}],"volume":"33","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a81e1e4b0c8380cd7b7a3","contributors":{"authors":[{"text":"Wilcox, D.A.","contributorId":55382,"corporation":false,"usgs":true,"family":"Wilcox","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":430995,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Xie, Y.","contributorId":107917,"corporation":false,"usgs":true,"family":"Xie","given":"Y.","email":"","affiliations":[],"preferred":false,"id":430996,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031247,"text":"70031247 - 2007 - Polycyclic aromatic hydrocarbon exposure in Steller's eiders (Polysticta stelleri) and harlequin ducks (Histronicus histronicus) in the Eastern Aleutian Islands, Alaska, USA","interactions":[],"lastModifiedDate":"2018-05-13T12:36:42","indexId":"70031247","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1571,"text":"Environmental Toxicology and Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"Polycyclic aromatic hydrocarbon exposure in Steller's eiders (Polysticta stelleri) and harlequin ducks (Histronicus histronicus) in the Eastern Aleutian Islands, Alaska, USA","docAbstract":"Seaducks may be affected by harmful levels of polycyclic aromatic hydrocarbons (PAHs) at seaports near the Arctic. As an indicator of exposure to PAHs, we measured hepatic enzyme 7-ethoxyresorufin-O-deethylase activity (EROD) to determine cytochrome P4501A induction in Steller's eiders (Polysticta stelleri) and Harlequin ducks (Histronicus histronicus) from Unalaska, Popof, and Unga Islands (AK, USA) in 2002 and 2003. We measured PAHs and organic contaminants in seaduck prey samples and polychlorinated biphenyl congeners in seaduck blood plasma to determine any relationship to EROD. Using Akaike's information criterion, species and site differences best explained EROD patterns: Activity was higher in Harlequin ducks than in Steller's eiders and higher at industrial than at nonindustrial sites. Site-specific concentrations of PAHs in blue mussels ([Mytilus trossilus] seaduck prey; PAH concentrations higher at Dutch Harbor, Unalaska, than at other sites) also was important in defining EROD patterns. Organochlorine compounds rarely were detected in prey samples. No relationship was found between polychlorinated biphenyl congeners in avian blood and EROD, which further supported inferences derived from Akaike's information criterion. Congeners were highest in seaducks from a nonindustrial or reference site, contrary to PAH patterns. To assist in interpreting the field study, 15 captive Steller's eiders were dosed with a PAH known to induce cytochrome P4501A. Dosed, captive Steller's eiders had definitive induction, but results indicated that wild Steller's eiders were exposed to PAHs or other inducing compounds at levels greater than those used in laboratory studies. Concentrations of PAHs in blue mussels at or near Dutch Harbor (∼1,180–5,980 ng/g) approached those found at highly contaminated sites (∼4,100–7,500 ng/g).
","language":"English","publisher":"Wiley","doi":"10.1897/07-259.1","issn":"07307268","usgsCitation":"Miles, A., Flint, P.L., Trust, K., Ricca, M., Spring, S., Arrieta, D., Hollmen, T., and Wilson, B., 2007, Polycyclic aromatic hydrocarbon exposure in Steller's eiders (Polysticta stelleri) and harlequin ducks (Histronicus histronicus) in the Eastern Aleutian Islands, Alaska, USA: Environmental Toxicology and Chemistry, v. 26, no. 12, p. 2694-2703, https://doi.org/10.1897/07-259.1.","productDescription":"10 p.","startPage":"2694","endPage":"2703","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":238684,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211401,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1897/07-259.1"}],"volume":"26","issue":"12","noUsgsAuthors":false,"publicationDate":"2007-12-01","publicationStatus":"PW","scienceBaseUri":"505a7cfce4b0c8380cd79cb1","contributors":{"authors":[{"text":"Miles, A.K. 0000-0002-3108-808X","orcid":"https://orcid.org/0000-0002-3108-808X","contributorId":85902,"corporation":false,"usgs":true,"family":"Miles","given":"A.K.","affiliations":[],"preferred":false,"id":430715,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Flint, Paul L. 0000-0002-8758-6993 pflint@usgs.gov","orcid":"https://orcid.org/0000-0002-8758-6993","contributorId":3284,"corporation":false,"usgs":true,"family":"Flint","given":"Paul","email":"pflint@usgs.gov","middleInitial":"L.","affiliations":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true},{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":430713,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Trust, K.A.","contributorId":107465,"corporation":false,"usgs":true,"family":"Trust","given":"K.A.","email":"","affiliations":[],"preferred":false,"id":430717,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ricca, M.A.","contributorId":103609,"corporation":false,"usgs":true,"family":"Ricca","given":"M.A.","affiliations":[],"preferred":false,"id":430716,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Spring, S.E.","contributorId":35258,"corporation":false,"usgs":true,"family":"Spring","given":"S.E.","email":"","affiliations":[],"preferred":false,"id":430712,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Arrieta, D.E.","contributorId":59625,"corporation":false,"usgs":true,"family":"Arrieta","given":"D.E.","email":"","affiliations":[],"preferred":false,"id":430714,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Hollmen, T.","contributorId":16787,"corporation":false,"usgs":true,"family":"Hollmen","given":"T.","email":"","affiliations":[],"preferred":false,"id":430710,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Wilson, B.W.","contributorId":32897,"corporation":false,"usgs":true,"family":"Wilson","given":"B.W.","email":"","affiliations":[],"preferred":false,"id":430711,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ,{"id":70031273,"text":"70031273 - 2007 - Application of ground-penetrating radar imagery for three-dimensional visualisation of near-surface structures in ice-rich permafrost, Barrow, Alaska","interactions":[],"lastModifiedDate":"2017-03-10T14:14:48","indexId":"70031273","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3032,"text":"Permafrost and Periglacial Processes","active":true,"publicationSubtype":{"id":10}},"title":"Application of ground-penetrating radar imagery for three-dimensional visualisation of near-surface structures in ice-rich permafrost, Barrow, Alaska","docAbstract":"Three-dimensional ground-penetrating radar (3D GPR) was used to investigate the subsurface structure of ice-wedge polygons and other features of the frozen active layer and near-surface permafrost near Barrow, Alaska. Surveys were conducted at three sites located on landscapes of different geomorphic age. At each site, sediment cores were collected and characterised to aid interpretation of GPR data. At two sites, 3D GPR was able to delineate subsurface ice-wedge networks with high fidelity. Three-dimensional GPR data also revealed a fundamental difference in ice-wedge morphology between these two sites that is consistent with differences in landscape age. At a third site, the combination of two-dimensional and 3D GPR revealed the location of an active frost boil with ataxitic cryostructure. When supplemented by analysis of soil cores, 3D GPR offers considerable potential for imaging, interpreting and 3D mapping of near-surface soil and ice structures in permafrost environments.
","language":"English","publisher":"Wiley","doi":"10.1002/ppp.594","issn":"10456740","usgsCitation":"Munroe, J.S., Doolittle, J.A., Kanevskiy, M., Hinkel, K.M., Nelson, F.E., Jones, B.M., Shur, Y., and Kimble, J.M., 2007, Application of ground-penetrating radar imagery for three-dimensional visualisation of near-surface structures in ice-rich permafrost, Barrow, Alaska: Permafrost and Periglacial Processes, v. 18, no. 4, p. 309-321, https://doi.org/10.1002/ppp.594.","productDescription":"13 p.","startPage":"309","endPage":"321","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":239948,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","city":"Barrow","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -157.25,\n 71\n ],\n [\n -155.6,\n 71\n ],\n [\n -155.6,\n 71.4\n ],\n [\n -157.25,\n 71.4\n ],\n [\n -157.25,\n 71\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"18","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-09-11","publicationStatus":"PW","scienceBaseUri":"5059eca1e4b0c8380cd493be","contributors":{"authors":[{"text":"Munroe, Jeffrey S.","contributorId":24175,"corporation":false,"usgs":false,"family":"Munroe","given":"Jeffrey","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":430848,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Doolittle, James A.","contributorId":29951,"corporation":false,"usgs":false,"family":"Doolittle","given":"James","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":430850,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kanevskiy, Mikhail","contributorId":60511,"corporation":false,"usgs":true,"family":"Kanevskiy","given":"Mikhail","affiliations":[],"preferred":false,"id":430852,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hinkel, Kenneth M.","contributorId":15405,"corporation":false,"usgs":true,"family":"Hinkel","given":"Kenneth","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":430847,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Nelson, Frederick E.","contributorId":107919,"corporation":false,"usgs":false,"family":"Nelson","given":"Frederick","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":430854,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Jones, Benjamin M. 0000-0002-1517-4711 bjones@usgs.gov","orcid":"https://orcid.org/0000-0002-1517-4711","contributorId":2286,"corporation":false,"usgs":true,"family":"Jones","given":"Benjamin","email":"bjones@usgs.gov","middleInitial":"M.","affiliations":[{"id":118,"text":"Alaska Science Center Geography","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":430851,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Shur, Yuri","contributorId":39302,"corporation":false,"usgs":true,"family":"Shur","given":"Yuri","affiliations":[],"preferred":false,"id":430849,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Kimble, John M.","contributorId":99376,"corporation":false,"usgs":false,"family":"Kimble","given":"John","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":430853,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ,{"id":70031320,"text":"70031320 - 2007 - Predicting yellow toadflax infestations in the Flat Tops Wilderness of Colorado","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70031320","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1018,"text":"Biological Invasions","active":true,"publicationSubtype":{"id":10}},"title":"Predicting yellow toadflax infestations in the Flat Tops Wilderness of Colorado","docAbstract":"Understanding species-environment relationships is important to predict the spread of non-native species. Yellow toadflax (Linaria vulgaris Mill.) is an invasive perennial recently found in the Flat Tops Wilderness of the White River National Forest on the western slope of the Colorado Rocky Mountains. We hypothesized yellow toadflax occurrence could be predicted from easily measured site characteristics. We used logistic regression with stepwise selection to generate a model to predict yellow toadflax occurrence on a particular plot based on that site's physical characteristics. The experimental design was a paired-plot study in two locations using circular 1,018-m2 plots. Sixty-eight plots that did not contain yellow toadflax and 65 plots that contained yellow toadflax were sampled at the Ripple Creek site in 1999. In 2000, 54 non-toadflax plots and 55 toadflax-containing plots were sampled in the Marvine Creek site. Site characteristics sampled included: vegetation type; under-canopy light level; slope; aspect; soil properties; presence of disturbance, trails, and/or water; and total species richness. A model that correctly classified >90% of the 242 plots sampled included two vegetation type parameters, the presence of trails, and total species richness. Yellow toadflax is most often found in areas that were open-canopy sites, along trails, and with higher species diversity plots (>23 species). This approach can be used for other species in other areas to rapidly identify areas vulnerable to invasion. ?? 2007 Springer Science+Business Media, Inc.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Biological Invasions","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10530-006-9075-8","issn":"13873547","usgsCitation":"Sutton, J., Stohlgren, T., and Beck, K., 2007, Predicting yellow toadflax infestations in the Flat Tops Wilderness of Colorado: Biological Invasions, v. 9, no. 7, p. 783-793, https://doi.org/10.1007/s10530-006-9075-8.","startPage":"783","endPage":"793","numberOfPages":"11","costCenters":[],"links":[{"id":212587,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10530-006-9075-8"},{"id":240092,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"9","issue":"7","noUsgsAuthors":false,"publicationDate":"2007-01-17","publicationStatus":"PW","scienceBaseUri":"505a81e3e4b0c8380cd7b7a8","contributors":{"authors":[{"text":"Sutton, J.R.","contributorId":32735,"corporation":false,"usgs":true,"family":"Sutton","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":431032,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stohlgren, T.J.","contributorId":7217,"corporation":false,"usgs":true,"family":"Stohlgren","given":"T.J.","email":"","affiliations":[],"preferred":false,"id":431030,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Beck, K.G.","contributorId":9069,"corporation":false,"usgs":true,"family":"Beck","given":"K.G.","email":"","affiliations":[],"preferred":false,"id":431031,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70031252,"text":"70031252 - 2007 - Developing terrestrial, multi-taxon indices of biological integrity: An example from coastal sage scrub","interactions":[],"lastModifiedDate":"2012-03-12T17:21:17","indexId":"70031252","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1015,"text":"Biological Conservation","active":true,"publicationSubtype":{"id":10}},"title":"Developing terrestrial, multi-taxon indices of biological integrity: An example from coastal sage scrub","docAbstract":"We screened 351 species or genera for their response to disturbance in coastal sage scrub (CSS) to develop a 15-metric, 5-taxon Index of Biological Integrity (IBI). We collected data on ants, birds, herpetofauna, small mammals, and plants for two years on 46 sites established across a gradient of disturbance in three reserves. The gradient spanned relatively intact CSS with thick stands of shrubs, to former CSS stands type-converted to exotic grasses. ANOVAs and clustering analyses indicated the IBI could distinguish four levels of disturbance in CSS. General measures of community structure, such as richness, did not show changes across the gradient for most taxa, and responses of taxa across the gradient were varied and rarely correlated. However, turnover in species or genera across the gradient was common across all taxa as shrub-obligate life forms were replaced by those favoring grassy or disturbed habitats. Our data indicate index-based approaches based on data collected across disturbance gradients may outperform more traditional community level metrics when responses to anthropogenic influences are complex and vary across species. ?? 2007 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Biological Conservation","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.biocon.2007.08.005","issn":"00063207","usgsCitation":"Diffendorfer, J., Fleming, G., Duggan, J., Chapman, R., Rahn, M., Mitrovich, M., and Fisher, R., 2007, Developing terrestrial, multi-taxon indices of biological integrity: An example from coastal sage scrub: Biological Conservation, v. 140, no. 1-2, p. 130-141, https://doi.org/10.1016/j.biocon.2007.08.005.","startPage":"130","endPage":"141","numberOfPages":"12","costCenters":[],"links":[{"id":211432,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.biocon.2007.08.005"},{"id":238718,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"140","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0012e4b0c8380cd4f591","contributors":{"authors":[{"text":"Diffendorfer, J.E.","contributorId":28569,"corporation":false,"usgs":true,"family":"Diffendorfer","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":430739,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fleming, G.M.","contributorId":56027,"corporation":false,"usgs":true,"family":"Fleming","given":"G.M.","email":"","affiliations":[],"preferred":false,"id":430742,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Duggan, J.M.","contributorId":66055,"corporation":false,"usgs":true,"family":"Duggan","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":430743,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Chapman, R.E.","contributorId":103864,"corporation":false,"usgs":true,"family":"Chapman","given":"R.E.","email":"","affiliations":[],"preferred":false,"id":430745,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Rahn, M.E.","contributorId":81693,"corporation":false,"usgs":true,"family":"Rahn","given":"M.E.","email":"","affiliations":[],"preferred":false,"id":430744,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Mitrovich, M.J.","contributorId":43166,"corporation":false,"usgs":true,"family":"Mitrovich","given":"M.J.","affiliations":[],"preferred":false,"id":430740,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Fisher, Robert N. 0000-0002-2956-3240","orcid":"https://orcid.org/0000-0002-2956-3240","contributorId":51675,"corporation":false,"usgs":true,"family":"Fisher","given":"Robert N.","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":430741,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70030945,"text":"70030945 - 2007 - Bald Mountain gold mining district, Nevada: A Jurassic reduced intrusion-related gold system","interactions":[],"lastModifiedDate":"2012-03-12T17:21:19","indexId":"70030945","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"Bald Mountain gold mining district, Nevada: A Jurassic reduced intrusion-related gold system","docAbstract":"The Bald Mountain mining district has produced about 2 million ounces (Moz) of An. Geologic mapping, field relationships, geochemical data, petrographic observations, fluid inclusion characteristics, and Pb, S, O, and H isotope data indicate that An mineralization was associated with a reduced Jurassic intrusion. Gold deposits are localized within and surrounding a Jurassic (159 Ma) quartz monzonite porphyry pluton and dike complex that intrudes Cambrian to Mississippian carbonate and clastic rocks. The pluton, associated dikes, and An mineralization were controlled by a crustal-scale northwest-trending structure named the Bida trend. Gold deposits are localized by fracture networks in the pluton and the contact metamorphic aureole, dike margins, high-angle faults, and certain strata or shale-limestone contacts in sedimentary rocks. Gold mineralization was accompanied by silicification and phyllic alteration, ??argillic alteration at shallow levels. Although An is typically present throughout, the system exhibits a classic concentric geochemical zonation pattern with Mo, W, Bi, and Cu near the center, Ag, Pb, and Zn at intermediate distances, and As and Sb peripheral to the intrusion. Near the center of the system, micron-sized native An occurs with base metal sulfides and sulfosalts. In peripheral deposits and in later stages of mineralization, Au is typically submicron in size and resides in pyrite or arsenopyrite. Electron microprobe and laser ablation ICP-MS analyses show that arsenopyrite, pyrite, and Bi sulfide minerals contain 10s to 1,000s of ppm Au. Ore-forming fluids were aqueous and carbonic at deep levels and episodically hypersaline at shallow levels due to boiling. The isotopic compositions of H and O in quartz and sericite and S and Pb in sulfides are indicative of magmatic ore fluids with sedimentary sulfur. Together, the evidence suggests that Au was introduced by reduced S-bearing magmatic fluids derived from a reduced intrusion. The reduced character of the intrusion was caused by assimilation of carbonaceous sedimentary rocks. Tertiary faults dismember the area and drop down the upper part of the mineralizing system to the west. The abundant and widespread kaolinite in oxide ores is relatively disordered (1A polytype) and has ??D and ??18O values suggestive of a supergene origin. The deep weathering and oxidation of the ores associated with exhumation made them amenable to open-pit mining and processing using cyanide heap leach methods. ?? 2007 Society of Economic Geologists, Inc.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Economic Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2113/gsecongeo.102.6.1129","issn":"03610128","usgsCitation":"Nutt, C., and Hofstra, A., 2007, Bald Mountain gold mining district, Nevada: A Jurassic reduced intrusion-related gold system: Economic Geology, v. 102, no. 6, p. 1129-1155, https://doi.org/10.2113/gsecongeo.102.6.1129.","startPage":"1129","endPage":"1155","numberOfPages":"27","costCenters":[],"links":[{"id":211588,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/gsecongeo.102.6.1129"},{"id":238900,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"102","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059eface4b0c8380cd4a3c0","contributors":{"authors":[{"text":"Nutt, C.J.","contributorId":52577,"corporation":false,"usgs":true,"family":"Nutt","given":"C.J.","email":"","affiliations":[],"preferred":false,"id":429333,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hofstra, A. H. 0000-0002-2450-1593","orcid":"https://orcid.org/0000-0002-2450-1593","contributorId":41426,"corporation":false,"usgs":true,"family":"Hofstra","given":"A. H.","affiliations":[],"preferred":false,"id":429332,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031155,"text":"70031155 - 2007 - Disruptions of stream sediment size and stability by lakes in mountain watersheds: Potential effects on periphyton biomass","interactions":[],"lastModifiedDate":"2012-03-12T17:21:01","indexId":"70031155","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2564,"text":"Journal of the North American Benthological Society","onlineIssn":"1937-237X","printIssn":"0887-3593","active":true,"publicationSubtype":{"id":10}},"title":"Disruptions of stream sediment size and stability by lakes in mountain watersheds: Potential effects on periphyton biomass","docAbstract":"The location of a stream reach relative to other landforms in a watershed is an important attribute. We hypothesized that lakes disrupt the frequency of finer, more mobile sediments and thereby change sediment transport processes such that benthic substrates are more stable (i.e., less mobile) below lakes than above lakes. In turn, we hypothesized that this reduced mobility would lead to greater periphyton biomass below lakes. We tested these hypotheses in study reaches above and below lakes in 3 mountain watersheds. To expand this comparison, we analyzed the relationship between sediment attributes and periphyton biomass in one watershed with and one watershed without a lake. We hypothesized that no clear pattern or change in sediment size or chlorophyll a (chl a) would be observed over a 3-km-long study reach without a lake. In contrast, we expected a clear discontinuity in both sediment size and chl a in a 7-km-long study reach interrupted by a lake. Average median sediment size (D50) was significantly larger (p < 0.01) in lake-outlet than lake-inlet reaches (41 mm vs 10 mm). Bed sediments in lake-outlet reaches were immobile during bankfull flows, whereas sediments at lake-inlet reaches were mobile during bankfull flows. Chlorophyll a was ???10x greater in lake-outlet reaches than in lake-inlet reaches, although this difference was not statistically significant (p = 0.17). The longitudinal analysis clearly showed geomorphic transitions in sediment size and mobility downstream of mountain lakes, and these geomorphic transitions might be associated with changes in periphyton biomass. Geomorphic transitions can alter sediment transport and should be considered in concert with other factors that are considered more commonly in benthic ecology, such as light, nutrients, and temperature. ?? 2007 by The North American Benthological Society.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of the North American Benthological Society","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1899/06-086.1","issn":"08873593","usgsCitation":"Myers, A., Marcarelli, A., Arp, C., Baker, M.A., and Wurtsbaugh, W., 2007, Disruptions of stream sediment size and stability by lakes in mountain watersheds: Potential effects on periphyton biomass: Journal of the North American Benthological Society, v. 26, no. 3, p. 390-400, https://doi.org/10.1899/06-086.1.","startPage":"390","endPage":"400","numberOfPages":"11","costCenters":[],"links":[{"id":211707,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1899/06-086.1"},{"id":239049,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"26","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0227e4b0c8380cd4feed","contributors":{"authors":[{"text":"Myers, A.K.","contributorId":12262,"corporation":false,"usgs":true,"family":"Myers","given":"A.K.","email":"","affiliations":[],"preferred":false,"id":430280,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Marcarelli, A.M.","contributorId":66480,"corporation":false,"usgs":true,"family":"Marcarelli","given":"A.M.","affiliations":[],"preferred":false,"id":430283,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Arp, C.D.","contributorId":54715,"corporation":false,"usgs":true,"family":"Arp","given":"C.D.","email":"","affiliations":[],"preferred":false,"id":430282,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Baker, M. A.","contributorId":94849,"corporation":false,"usgs":false,"family":"Baker","given":"M.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":430284,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Wurtsbaugh, W.A.","contributorId":36751,"corporation":false,"usgs":true,"family":"Wurtsbaugh","given":"W.A.","email":"","affiliations":[],"preferred":false,"id":430281,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70031161,"text":"70031161 - 2007 - Oxygen and sulfur isotope systematics of sulfate produced by bacterial and abiotic oxidation of pyrite","interactions":[],"lastModifiedDate":"2012-03-12T17:21:18","indexId":"70031161","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1759,"text":"Geochimica et Cosmochimica Acta","active":true,"publicationSubtype":{"id":10}},"title":"Oxygen and sulfur isotope systematics of sulfate produced by bacterial and abiotic oxidation of pyrite","docAbstract":"To better understand reaction pathways of pyrite oxidation and biogeochemical controls on ??18O and ??34S values of the generated sulfate in acid mine drainage (AMD) and other natural environments, we conducted a series of pyrite oxidation experiments in the laboratory. Our biological and abiotic experiments were conducted under aerobic conditions by using O2 as an oxidizing agent and under anaerobic conditions by using dissolved Fe(III)aq as an oxidant with varying ??18OH2O values in the presence and absence of Acidithiobacillus ferrooxidans. In addition, aerobic biological experiments were designed as short- and long-term experiments where the final pH was controlled at ???2.7 and 2.2, respectively. Due to the slower kinetics of abiotic sulfide oxidation, the aerobic abiotic experiments were only conducted as long term with a final pH of ???2.7. The ??34SSO4 values from both the biological and abiotic anaerobic experiments indicated a small but significant sulfur isotope fractionation (???-0.7???) in contrast to no significant fractionation observed from any of the aerobic experiments. Relative percentages of the incorporation of water-derived oxygen and dissolved oxygen (O2) to sulfate were estimated, in addition to the oxygen isotope fractionation between sulfate and water, and dissolved oxygen. As expected, during the biological and abiotic anaerobic experiments all of the sulfate oxygen was derived from water. The percentage incorporation of water-derived oxygen into sulfate during the oxidation experiments by O2 varied with longer incubation and lower pH, but not due to the presence or absence of bacteria. These percentages were estimated as 85%, 92% and 87% from the short-term biological, long-term biological and abiotic control experiments, respectively. An oxygen isotope fractionation effect between sulfate and water (??18 OSO4 s(-) H2 O) of ???3.5??? was determined for the anaerobic (biological and abiotic) experiments. This measured ??18 OSO42 - s(-) H2 O value was then used to estimate the oxygen isotope fractionation effects (??18 OSO42 - s(-) O2) between sulfate and dissolved oxygen in the aerobic experiments which were -10.0???, -10.8???, and -9.8??? for the short-term biological, long-term biological and abiotic control experiments, respectively. Based on the similarity between ??18OSO4 values in the biological and abiotic experiments, it is suggested that ??18OSO4 values cannot be used to distinguish biological and abiotic mechanisms of pyrite oxidation. The results presented here suggest that Fe(III)aq is the primary oxidant for pyrite at pH < 3, even in the presence of dissolved oxygen, and that the main oxygen source of sulfate is water-oxygen under both aerobic and anaerobic conditions. ?? 2007 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geochimica et Cosmochimica Acta","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.gca.2007.04.017","issn":"00167037","usgsCitation":"Balci, N., Shanks, W.C., Mayer, B., and Mandernack, K., 2007, Oxygen and sulfur isotope systematics of sulfate produced by bacterial and abiotic oxidation of pyrite: Geochimica et Cosmochimica Acta, v. 71, no. 15, p. 3796-3811, https://doi.org/10.1016/j.gca.2007.04.017.","startPage":"3796","endPage":"3811","numberOfPages":"16","costCenters":[],"links":[{"id":211405,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.gca.2007.04.017"},{"id":238688,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"71","issue":"15","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7285e4b0c8380cd76b4d","contributors":{"authors":[{"text":"Balci, N.","contributorId":15005,"corporation":false,"usgs":true,"family":"Balci","given":"N.","email":"","affiliations":[],"preferred":false,"id":430314,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Shanks, Wayne C. III","contributorId":100527,"corporation":false,"usgs":true,"family":"Shanks","given":"Wayne","suffix":"III","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":430317,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mayer, B.","contributorId":84538,"corporation":false,"usgs":true,"family":"Mayer","given":"B.","email":"","affiliations":[],"preferred":false,"id":430316,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Mandernack, K.W.","contributorId":68913,"corporation":false,"usgs":true,"family":"Mandernack","given":"K.W.","email":"","affiliations":[],"preferred":false,"id":430315,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70035203,"text":"70035203 - 2007 - Neogene transpressional foreland basin development on the north side of the central alaska range, usibelli group and nenana gravel, tanana basin","interactions":[],"lastModifiedDate":"2012-03-12T17:21:54","indexId":"70035203","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3459,"text":"Special Paper of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Neogene transpressional foreland basin development on the north side of the central alaska range, usibelli group and nenana gravel, tanana basin","docAbstract":"Neogene strata of the Tanana basin provide a long-term record of a northwardpropagating, transpressional foreland-basin system related to regional shortening of the central Alaska Range and strike-slip displacement on the Denali fault system. These strata are ???2 km thick and have been deformed and exhumed in thrust faults that form the foothills on the north side of the Alaska Range. The lower part of the sedimentary package, the Usibelli Group, consists of 800 m of mainly Miocene strata that were deposited in fluvial, lacustrine, and peat bog environments of the foredeep depozone of the foreland-basin system. Compositional data from conglomerate and sandstone, as well as recycled Upper Cretaceous palynomorphs, indicate that the Miocene foreland-basin system was supplied increasing amounts of sediment from lithologies currently exposed in thrust sheets located south of the basin. The upper part of the sedimentary package, the Nenana Gravel, consists of 1200 m of mainly Pliocene strata that were deposited in alluvial-fan and braidplain environments in the wedge-top depozone of the foreland-basin system. Compositional data from conglomerate and sandstone, as well as 40Ar/39Ar dating of detrital feldspars in sandstone and from granitic clasts in conglomerate, indicate that lithologies exposed in the central Alaska Range provided most of the detritus to the Pliocene foreland-basin system. 40Ar/39Ar dates from detrital feldspar grains also show that two main suites of plutons contributed sediment to the Nenana Gravel. Detrital feldspars with an average age of 56 Ma are interpreted to have been derived from the McKinley sequence of plutons located south of the Denali fault. Detrital feldspars with an average age of 34 Ma are interpreted to have been derived from plutons located north of the Denali fault. Plutons located south of the Denali fault provided detritus for the lower part of the Nenana Gravel, whereas plutons located north of the Denali fault began to contribute sediment during deposition of the upper part of the Nenana Gravel. This age distribution documented in detrital feldspars of the Nenana Gravel is interpreted as representing a progressive northward exhumation of plutons that were located south of the Pliocene Tanana basin. In contrast to previous studies, we interpret the Usibelli Group and Nenana Gravel to represent a continuum in the evolution of a transpressional foreland basin that began during Miocene time on the north side of the Alaska Range. Copyright ?? 2007 The Geological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Special Paper of the Geological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/2007.2431(20)","issn":"00721077","usgsCitation":"Ridgway, K., Thoms, E., Layer, P., Lesh, M., White, J.M., and Smith, S.V., 2007, Neogene transpressional foreland basin development on the north side of the central alaska range, usibelli group and nenana gravel, tanana basin: Special Paper of the Geological Society of America, no. 431, p. 507-547, https://doi.org/10.1130/2007.2431(20).","startPage":"507","endPage":"547","numberOfPages":"41","costCenters":[],"links":[{"id":215244,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/2007.2431(20)"},{"id":243034,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"431","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6454e4b0c8380cd7298c","contributors":{"authors":[{"text":"Ridgway, K.D.","contributorId":62792,"corporation":false,"usgs":true,"family":"Ridgway","given":"K.D.","email":"","affiliations":[],"preferred":false,"id":449715,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Thoms, E.E.","contributorId":88969,"corporation":false,"usgs":true,"family":"Thoms","given":"E.E.","email":"","affiliations":[],"preferred":false,"id":449716,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Layer, P.W.","contributorId":42398,"corporation":false,"usgs":true,"family":"Layer","given":"P.W.","email":"","affiliations":[],"preferred":false,"id":449713,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lesh, M.E.","contributorId":53619,"corporation":false,"usgs":true,"family":"Lesh","given":"M.E.","email":"","affiliations":[],"preferred":false,"id":449714,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"White, J. M.","contributorId":40268,"corporation":false,"usgs":true,"family":"White","given":"J.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":449712,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Smith, S. V.","contributorId":89284,"corporation":false,"usgs":true,"family":"Smith","given":"S.","email":"","middleInitial":"V.","affiliations":[],"preferred":false,"id":449717,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70030947,"text":"70030947 - 2007 - Relation between mortality of prickly sculpin and diurnal extremes in water quality at Rodeo Lagoon, Marin County, California","interactions":[],"lastModifiedDate":"2018-09-25T09:23:48","indexId":"70030947","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1153,"text":"California Fish and Game","active":true,"publicationSubtype":{"id":10}},"title":"Relation between mortality of prickly sculpin and diurnal extremes in water quality at Rodeo Lagoon, Marin County, California","docAbstract":"[No abstract available]","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"California Fish and Game","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00081078","usgsCitation":"Martin, B., Saiki, M.K., and Fong, D., 2007, Relation between mortality of prickly sculpin and diurnal extremes in water quality at Rodeo Lagoon, Marin County, California: California Fish and Game, v. 93, no. 4, p. 214-223.","startPage":"214","endPage":"223","numberOfPages":"10","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":238933,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"93","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"50e4a644e4b0e8fec6cdc152","contributors":{"authors":[{"text":"Martin, B.A.","contributorId":91269,"corporation":false,"usgs":true,"family":"Martin","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":429338,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Saiki, M. K.","contributorId":28917,"corporation":false,"usgs":true,"family":"Saiki","given":"M.","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":429336,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Fong, D.","contributorId":36750,"corporation":false,"usgs":true,"family":"Fong","given":"D.","email":"","affiliations":[],"preferred":false,"id":429337,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70031527,"text":"70031527 - 2007 - Evaluation of a non-point source pollution model, AnnAGNPS, in a tropical watershed","interactions":[],"lastModifiedDate":"2012-03-12T17:21:14","indexId":"70031527","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1551,"text":"Environmental Modelling and Software","active":true,"publicationSubtype":{"id":10}},"title":"Evaluation of a non-point source pollution model, AnnAGNPS, in a tropical watershed","docAbstract":"Impaired water quality caused by human activity and the spread of invasive plant and animal species has been identified as a major factor of degradation of coastal ecosystems in the tropics. The main goal of this study was to evaluate the performance of AnnAGNPS (Annualized Non-Point Source Pollution Model), in simulating runoff and soil erosion in a 48 km2 watershed located on the Island of Kauai, Hawaii. The model was calibrated and validated using 2 years of observed stream flow and sediment load data. Alternative scenarios of spatial rainfall distribution and canopy interception were evaluated. Monthly runoff volumes predicted by AnnAGNPS compared well with the measured data (R2 = 0.90, P < 0.05); however, up to 60% difference between the actual and simulated runoff were observed during the driest months (May and July). Prediction of daily runoff was less accurate (R2 = 0.55, P < 0.05). Predicted and observed sediment yield on a daily basis was poorly correlated (R2 = 0.5, P < 0.05). For the events of small magnitude, the model generally overestimated sediment yield, while the opposite was true for larger events. Total monthly sediment yield varied within 50% of the observed values, except for May 2004. Among the input parameters the model was most sensitive to the values of ground residue cover and canopy cover. It was found that approximately one third of the watershed area had low sediment yield (0-1 t ha-1 y-1), and presented limited erosion threat. However, 5% of the area had sediment yields in excess of 5 t ha-1 y-1. Overall, the model performed reasonably well, and it can be used as a management tool on tropical watersheds to estimate and compare sediment loads, and identify \"hot spots\" on the landscape. ?? 2007 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Modelling and Software","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.envsoft.2006.12.001","issn":"13648152","usgsCitation":"Polyakov, V., Fares, A., Kubo, D., Jacobi, J., and Smith, C., 2007, Evaluation of a non-point source pollution model, AnnAGNPS, in a tropical watershed: Environmental Modelling and Software, v. 22, no. 11, p. 1617-1627, https://doi.org/10.1016/j.envsoft.2006.12.001.","startPage":"1617","endPage":"1627","numberOfPages":"11","costCenters":[],"links":[{"id":212537,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.envsoft.2006.12.001"},{"id":240034,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"22","issue":"11","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0c34e4b0c8380cd52a90","contributors":{"authors":[{"text":"Polyakov, V.","contributorId":96900,"corporation":false,"usgs":true,"family":"Polyakov","given":"V.","email":"","affiliations":[],"preferred":false,"id":431963,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fares, A.","contributorId":12697,"corporation":false,"usgs":true,"family":"Fares","given":"A.","email":"","affiliations":[],"preferred":false,"id":431960,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kubo, D.","contributorId":52401,"corporation":false,"usgs":true,"family":"Kubo","given":"D.","email":"","affiliations":[],"preferred":false,"id":431961,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jacobi, J.","contributorId":97321,"corporation":false,"usgs":true,"family":"Jacobi","given":"J.","email":"","affiliations":[],"preferred":false,"id":431964,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Smith, C.","contributorId":96429,"corporation":false,"usgs":true,"family":"Smith","given":"C.","affiliations":[],"preferred":false,"id":431962,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70031256,"text":"70031256 - 2007 - On the choice of statistical models for estimating occurrence and extinction from animal surveys","interactions":[],"lastModifiedDate":"2012-03-12T17:21:19","indexId":"70031256","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1465,"text":"Ecology","active":true,"publicationSubtype":{"id":10}},"title":"On the choice of statistical models for estimating occurrence and extinction from animal surveys","docAbstract":"In surveys of natural animal populations the number of animals that are present and available to be detected at a sample location is often low, resulting in few or no detections. Low detection frequencies are especially common in surveys of imperiled species; however, the choice of sampling method and protocol also may influence the size of the population that is vulnerable to detection. In these circumstances, probabilities of animal occurrence and extinction will generally be estimated more accurately if the models used in data analysis account for differences in abundance among sample locations and for the dependence between site-specific abundance and detection. Simulation experiments are used to illustrate conditions wherein these types of models can be expected to outperform alternative estimators of population site occupancy and extinction. ?? 2007 by the Ecological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1890/07-0006.1","issn":"00129658","usgsCitation":"Dorazio, R., 2007, On the choice of statistical models for estimating occurrence and extinction from animal surveys: Ecology, v. 88, no. 11, p. 2773-2782, https://doi.org/10.1890/07-0006.1.","startPage":"2773","endPage":"2782","numberOfPages":"10","costCenters":[],"links":[{"id":487661,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1890/07-0006.1","text":"Publisher Index Page"},{"id":238623,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211347,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1890/07-0006.1"}],"volume":"88","issue":"11","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6dbce4b0c8380cd752cb","contributors":{"authors":[{"text":"Dorazio, R.M. 0000-0003-2663-0468","orcid":"https://orcid.org/0000-0003-2663-0468","contributorId":23475,"corporation":false,"usgs":true,"family":"Dorazio","given":"R.M.","affiliations":[],"preferred":false,"id":430756,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70031329,"text":"70031329 - 2007 - Distinguishing wild vs. stocked lake trout (Salvelinus namaycush) in Lake Ontario: Evidence from carbon and oxygen stable isotope values of otoliths","interactions":[],"lastModifiedDate":"2016-04-28T13:38:13","indexId":"70031329","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2330,"text":"Journal of Great Lakes Research","active":true,"publicationSubtype":{"id":10}},"title":"Distinguishing wild vs. stocked lake trout (Salvelinus namaycush) in Lake Ontario: Evidence from carbon and oxygen stable isotope values of otoliths","docAbstract":"We investigated the potential for using carbon and oxygen isotope values of otolith carbonate as a method to distinguish naturally produced (wild) lake trout (Salvelinus namaycush) from hatchery-reared lake trout in Lake Ontario. We determined δ 13C(CaCO3) and δ 18O(CaCO3) values of otoliths from juvenile fish taken from two hatcheries, and of otoliths from wild yearlings. Clear differences in isotope values were observed between the three groups. Subsequently we examined otoliths from large marked and unmarked fish captured in the lake, determining isotope values for regions of the otolith corresponding to the first year of life. Marked (i.e., stocked) fish showed isotope ratios similar to one of the hatchery groups, whereas unmarked fish, (wild fish or stocked fish that lost the mark) showed isotope ratios similar either to one of the hatchery groups or to the wild group. We interpret these data to suggest that carbon and oxygen isotope values can be used to determine the origin of lake trout in Lake Ontario, if a catalogue of characteristic isotope values from all candidate years and hatcheries is compiled.
","language":"English","publisher":"International Association for Great Lakes Research","doi":"10.3394/0380-1330(2007)33[912:DWVSLT]2.0.CO;2","issn":"03801330","usgsCitation":"Schaner, T., Patterson, W., Lantry, B., and O'Gorman, R., 2007, Distinguishing wild vs. stocked lake trout (Salvelinus namaycush) in Lake Ontario: Evidence from carbon and oxygen stable isotope values of otoliths: Journal of Great Lakes Research, v. 33, no. 4, p. 912-916, https://doi.org/10.3394/0380-1330(2007)33[912:DWVSLT]2.0.CO;2.","productDescription":"5 p.","startPage":"912","endPage":"916","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":239648,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212198,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3394/0380-1330(2007)33[912:DWVSLT]2.0.CO;2"}],"volume":"33","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0253e4b0c8380cd4ffe1","contributors":{"authors":[{"text":"Schaner, T.","contributorId":12821,"corporation":false,"usgs":true,"family":"Schaner","given":"T.","email":"","affiliations":[],"preferred":false,"id":431072,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Patterson, W.P.","contributorId":94858,"corporation":false,"usgs":true,"family":"Patterson","given":"W.P.","email":"","affiliations":[],"preferred":false,"id":431075,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lantry, B.F.","contributorId":19105,"corporation":false,"usgs":true,"family":"Lantry","given":"B.F.","email":"","affiliations":[],"preferred":false,"id":431073,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"O'Gorman, R.","contributorId":48896,"corporation":false,"usgs":true,"family":"O'Gorman","given":"R.","affiliations":[],"preferred":false,"id":431074,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70031321,"text":"70031321 - 2007 - Estimating trend precision and power to detect trends across grouped count data","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70031321","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1465,"text":"Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Estimating trend precision and power to detect trends across grouped count data","docAbstract":"Ecologists commonly use grouped or clustered count data to estimate temporal trends in counts, abundance indices, or abundance. For example, the U.S. Breeding Bird Survey data represent multiple counts of birds from within each of multiple, spatially defined routes. Despite a reliance on grouped counts, analytical methods for prospectively estimating precision of trend estimates or statistical power to detect trends that explicitly acknowledge the characteristics of grouped count data are undescribed. These characteristics include the fact that the sampling variance is an increasing function of the mean, and that sampling and group-level variance estimates are generally estimated on different scales (the sampling and log scales, respectively). We address these issues for repeated sampling of a single population using an analytical approach that has the flavor of a generalized linear mixed model, specifically that of a negative binomial-distributed count variable with random group effects. The count mean, including grand intercept, trend, and random group effects, is modeled linearly on the log scale, while sampling variance of the mean is estimated on the log scale via the delta method. Results compared favorably with those derived using Monte Carlo simulations. For example, at trend = 5% per temporal unit, differences in standard errors and in power were modest relative to those estimated by simulation (???|11|% and ???|16|%, respectively), with relative differences among power estimates decreasing to ???|7|% when power estimated by simulations was ???0.50. Similar findings were obtained using data from nine surveys of fingernail clams in the Mississippi River. The proposed method is suggested (1) where simulations are not practical and relative precision or power is desired, or (2) when multiple precision or power calculations are required and where the accuracy of a fraction of those calculations will be confirmed using simulations. ?? 2007 by the Ecological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1890/06-1714.1","issn":"00129658","usgsCitation":"Gray, B., and Burlew, M., 2007, Estimating trend precision and power to detect trends across grouped count data: Ecology, v. 88, no. 9, p. 2364-2372, https://doi.org/10.1890/06-1714.1.","startPage":"2364","endPage":"2372","numberOfPages":"9","costCenters":[],"links":[{"id":212614,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1890/06-1714.1"},{"id":240128,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"88","issue":"9","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0b6ae4b0c8380cd526f1","contributors":{"authors":[{"text":"Gray, B. R. 0000-0001-7682-9550","orcid":"https://orcid.org/0000-0001-7682-9550","contributorId":14785,"corporation":false,"usgs":true,"family":"Gray","given":"B. R.","affiliations":[],"preferred":false,"id":431033,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Burlew, M.M.","contributorId":69784,"corporation":false,"usgs":true,"family":"Burlew","given":"M.M.","email":"","affiliations":[],"preferred":false,"id":431034,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031526,"text":"70031526 - 2007 - A simple pore water hydrogen diffusion syringe sampler","interactions":[],"lastModifiedDate":"2018-10-16T09:32:52","indexId":"70031526","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"A simple pore water hydrogen diffusion syringe sampler","docAbstract":"Molecular hydrogen (H2) is an important intermediate product and electron donor in microbial metabolism. Concentrations of dissolved H 2 are often diagnostic of the predominant terminal electron-accepting processes in ground water systems or aquatic sediments. H2 concentrations are routinely measured in ground water monitoring wells but are rarely measured in saturated aquatic sediments due to a lack of simple and practical sampling methods. This report describes the design and development (including laboratory and field testing) of a simple, syringe-based H 2 sampler in (1) saturated, riparian sediments, (2) surface water bed sediments, and (3) packed intervals of a fractured bedrock borehole that are inaccessible by standard pumped methods.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1745-6584.2007.00362.x","issn":"0017467X","usgsCitation":"Vroblesky, D., Chapelle, F.H., and Bradley, P.M., 2007, A simple pore water hydrogen diffusion syringe sampler: Ground Water, v. 45, no. 6, p. 798-802, https://doi.org/10.1111/j.1745-6584.2007.00362.x.","productDescription":"5 p.","startPage":"798","endPage":"802","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240033,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212536,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6584.2007.00362.x"}],"volume":"45","issue":"6","noUsgsAuthors":false,"publicationDate":"2007-08-09","publicationStatus":"PW","scienceBaseUri":"5059e591e4b0c8380cd46e2b","contributors":{"authors":[{"text":"Vroblesky, Don vroblesk@usgs.gov","contributorId":207411,"corporation":false,"usgs":true,"family":"Vroblesky","given":"Don","email":"vroblesk@usgs.gov","affiliations":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"preferred":true,"id":431958,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chapelle, Francis H. chapelle@usgs.gov","contributorId":1350,"corporation":false,"usgs":true,"family":"Chapelle","given":"Francis","email":"chapelle@usgs.gov","middleInitial":"H.","affiliations":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true},{"id":559,"text":"South Carolina Water Science Center","active":true,"usgs":true}],"preferred":true,"id":431959,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bradley, Paul M. 0000-0001-7522-8606 pbradley@usgs.gov","orcid":"https://orcid.org/0000-0001-7522-8606","contributorId":361,"corporation":false,"usgs":true,"family":"Bradley","given":"Paul","email":"pbradley@usgs.gov","middleInitial":"M.","affiliations":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"preferred":true,"id":431957,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70031157,"text":"70031157 - 2007 - Separation of copper, iron, and zinc from complex aqueous solutions for isotopic measurement","interactions":[],"lastModifiedDate":"2018-10-16T10:06:37","indexId":"70031157","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1213,"text":"Chemical Geology","active":true,"publicationSubtype":{"id":10}},"title":"Separation of copper, iron, and zinc from complex aqueous solutions for isotopic measurement","docAbstract":"The measurement of Cu, Fe, and Zn isotopes in natural samples may provide valuable information about biogeochemical processes in the environment. However, the widespread application of stable Cu, Fe, and Zn isotope chemistry to natural water systems remains limited by our ability to efficiently separate these trace elements from the greater concentrations of matrix elements. In this study, we present a new method for the isolation of Cu, Fe, and Zn from complex aqueous solutions using a single anion-exchange column with hydrochloric acid media. Using this method we are able to quantitatively separate Cu, Fe, and Zn from each other and from matrix elements in a single column elution. Elution of the elements of interest, as well as all other elements, through the anion-exchange column is a function of the speciation of each element in the various concentrations of HCl. We highlight the column chemistry by comparing our observations with published studies that have investigated the speciation of Cu, Fe, and Zn in chloride solutions.
The functionality of the column procedure was tested by measuring Cu, Fe, and Zn isotopes in a variety of stream water samples impacted by acid mine drainage. The accuracy and precision of Zn isotopic measurements was tested by doping Zn-free stream water with the Zn isotopic standard. The reproducibility of the entire column separation process and the overall precision of the isotopic measurements were also evaluated. The isotopic results demonstrate that the Cu, Fe, and Zn column separates from the tested stream waters are of sufficient purity to be analyzed directly using a multicollector inductively coupled plasma mass spectrometer (MC-ICP-MS), and that the measurements are fully-reproducible, accurate, and precise. Although limited in scope, these isotopic measurements reveal significant variations in δ65Cu (− 1.41 to + 0.30‰), δ56Fe (− 0.56 to + 0.34‰), and δ66Zn (0.31 to 0.49‰) among samples collected from different abandoned mines within a single watershed. Hence, Cu, Fe, and Zn isotopic measurements may be a powerful tool for fingerprinting specific metal sources and/or examining biogeochemical reactions within fresh water systems.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Chemical Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.chemgeo.2007.04.004","issn":"00092541","usgsCitation":"Borrok, D.M., Wanty, R.B., Ridley, W.I., Wolf, R.E., Lamothe, P.J., and Adams, M., 2007, Separation of copper, iron, and zinc from complex aqueous solutions for isotopic measurement: Chemical Geology, v. 242, no. 3-4, p. 400-414, https://doi.org/10.1016/j.chemgeo.2007.04.004.","productDescription":"15 p.","startPage":"400","endPage":"414","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":238546,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211281,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.chemgeo.2007.04.004"}],"volume":"242","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8d40e4b08c986b3182fe","contributors":{"authors":[{"text":"Borrok, David M.","contributorId":26056,"corporation":false,"usgs":true,"family":"Borrok","given":"David","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":430291,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wanty, Richard B. 0000-0002-2063-6423 rwanty@usgs.gov","orcid":"https://orcid.org/0000-0002-2063-6423","contributorId":443,"corporation":false,"usgs":true,"family":"Wanty","given":"Richard","email":"rwanty@usgs.gov","middleInitial":"B.","affiliations":[{"id":211,"text":"Crustal Geophysics and Geochemistry Science Center","active":true,"usgs":true}],"preferred":true,"id":430294,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ridley, William I. 0000-0001-6787-558X iridley@usgs.gov","orcid":"https://orcid.org/0000-0001-6787-558X","contributorId":1160,"corporation":false,"usgs":true,"family":"Ridley","given":"William","email":"iridley@usgs.gov","middleInitial":"I.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":430295,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Wolf, Ruth E. rwolf@usgs.gov","contributorId":903,"corporation":false,"usgs":true,"family":"Wolf","given":"Ruth","email":"rwolf@usgs.gov","middleInitial":"E.","affiliations":[{"id":211,"text":"Crustal Geophysics and Geochemistry Science Center","active":true,"usgs":true}],"preferred":true,"id":430293,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Lamothe, Paul J. plamothe@usgs.gov","contributorId":1298,"corporation":false,"usgs":true,"family":"Lamothe","given":"Paul","email":"plamothe@usgs.gov","middleInitial":"J.","affiliations":[],"preferred":true,"id":430292,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Adams, M.","contributorId":81176,"corporation":false,"usgs":true,"family":"Adams","given":"M.","email":"","affiliations":[],"preferred":false,"id":430296,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70030901,"text":"70030901 - 2007 - Imprint of oaks on nitrogen availability and δ15N in California grassland-savanna: A case of enhanced N inputs?","interactions":[],"lastModifiedDate":"2013-07-11T15:10:48","indexId":"70030901","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3086,"text":"Plant Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Imprint of oaks on nitrogen availability and δ15N in California grassland-savanna: A case of enhanced N inputs?","docAbstract":"Woody vegetation is distributed patchily in many arid and semi-arid ecosystems, where it is often associated with elevated nitrogen (N) pools and availability in islands of fertility. We measured N availability and δ15N in paired blue-oak versus annual grass dominated patches to characterize the causes and consequences of spatial variation in N dynamics of grassland-savanna in Sequoia-Kings Canyon National Park. We found significantly greater surface soil N pools (0–20 cm) in oak patches compared to adjacent grass areas across a 700 m elevation gradient from foothills to the savanna-forest boundary. N accumulation under oaks was associated with a 0.6‰ depletion in soil δ15N relative to grass patches. Results from a simple δ15N mass balance simulation model, constrained by surface soil N and δ15N measured in the field, suggest that the development of islands of N fertility under oaks can be traced primarily to enhanced N inputs. Net N mineralization and percent nitrification in laboratory incubations were consistently higher under oaks across a range of experimental soil moisture regimes, suggesting a scenario whereby greater N inputs to oak patches result in net N accumulation and enhanced N cycling, with a potential for greater nitrate loss as well. N concentrations of three common herbaceous annual plants were nearly 50% greater under oak than in adjacent grass patches, with community composition shifted towards more N-demanding species under oaks. We find that oaks imprint distinct N-rich islands of fertility that foster local feedback between soil N cycling, plant N uptake, and herbaceous community composition. Such patch-scale differences in N inputs and plant–soil interactions increase biogeochemical heterogeneity in grassland-savanna ecosystems and may shape watershed-level responses to chronic N deposition.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Plant Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s11258-006-9238-9","issn":"13850237","usgsCitation":"Perakis, S., and Kellogg, C., 2007, Imprint of oaks on nitrogen availability and δ15N in California grassland-savanna: A case of enhanced N inputs?: Plant Ecology, v. 191, no. 2, p. 209-220, https://doi.org/10.1007/s11258-006-9238-9.","productDescription":"12 p.","startPage":"209","endPage":"220","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":211443,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s11258-006-9238-9"},{"id":238734,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -124.41,32.53 ], [ -124.41,42.01 ], [ -114.13,42.01 ], [ -114.13,32.53 ], [ -124.41,32.53 ] ] ] } } ] }","volume":"191","issue":"2","noUsgsAuthors":false,"publicationDate":"2006-12-10","publicationStatus":"PW","scienceBaseUri":"505a394de4b0c8380cd61893","contributors":{"authors":[{"text":"Perakis, S.S.","contributorId":82039,"corporation":false,"usgs":true,"family":"Perakis","given":"S.S.","affiliations":[],"preferred":false,"id":429143,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kellogg, C.H.","contributorId":82903,"corporation":false,"usgs":true,"family":"Kellogg","given":"C.H.","email":"","affiliations":[],"preferred":false,"id":429144,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031261,"text":"70031261 - 2007 - Gene expression in the liver of rainbow trout, Oncorhynchus mykiss, during the stress response","interactions":[],"lastModifiedDate":"2017-05-06T16:12:48","indexId":"70031261","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":"Gene expression in the liver of rainbow trout, Oncorhynchus mykiss, during the stress response","docAbstract":"To better appreciate the mechanisms underlying the physiology of the stress response, an oligonucleotide microarray and real-time RT-PCR (QRT-PCR) were used to study gene expression in the livers of rainbow trout (Oncorhynchus mykiss). For increased confidence in the discovery of candidate genes responding to stress, we conducted two separate experiments using fish from different year classes. In both experiments, fish exposed to a 3 h stressor were compared to control (unstressed) fish. In the second experiment some additional fish were exposed to only 0.5 h of stress and others were sampled 21 h after experiencing a 3 h stressor. This 21 h post-stress treatment was a means to study gene expression during recovery from stress. The genes we report as differentially expressed are those that responded similarly in both experiments, suggesting that they are robust indicators of stress. Those genes are a major histocompatibility complex class 1 molecule (MHC1), JunB, glucose 6-phosphatase (G6Pase), and nuclear protein 1 (Nupr1). Interestingly, Nupr1 gene expression was still elevated 21 h after stress, which indicates that recovery was incomplete at that time.
","language":"English","publisher":"Elsevier","doi":"10.1016/j.cbd.2007.06.002","issn":"1744117X","usgsCitation":"Momoda, T., Schwindt, A., Feist, G., Gerwick, L., Bayne, C., and Schreck, C., 2007, Gene expression in the liver of rainbow trout, Oncorhynchus mykiss, during the stress response: Comparative Biochemistry and Physiology, Part D: Genomics and Proteomics, v. 2, no. 4, p. 303-315, https://doi.org/10.1016/j.cbd.2007.06.002.","productDescription":"13 p.","startPage":"303","endPage":"315","costCenters":[],"links":[{"id":238653,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"2","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a14f9e4b0c8380cd54c52","contributors":{"authors":[{"text":"Momoda, T.S.","contributorId":24564,"corporation":false,"usgs":true,"family":"Momoda","given":"T.S.","email":"","affiliations":[],"preferred":false,"id":430780,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schwindt, A.R.","contributorId":51091,"corporation":false,"usgs":true,"family":"Schwindt","given":"A.R.","affiliations":[],"preferred":false,"id":430782,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Feist, G.W.","contributorId":46261,"corporation":false,"usgs":true,"family":"Feist","given":"G.W.","email":"","affiliations":[],"preferred":false,"id":430781,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Gerwick, L.","contributorId":70592,"corporation":false,"usgs":true,"family":"Gerwick","given":"L.","affiliations":[],"preferred":false,"id":430784,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Bayne, C.J.","contributorId":53161,"corporation":false,"usgs":true,"family":"Bayne","given":"C.J.","email":"","affiliations":[],"preferred":false,"id":430783,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Schreck, C.B.","contributorId":11977,"corporation":false,"usgs":true,"family":"Schreck","given":"C.B.","email":"","affiliations":[],"preferred":false,"id":430779,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70031533,"text":"70031533 - 2007 - Predicted sedimentary record of reflected bores","interactions":[],"lastModifiedDate":"2023-07-25T11:15:42.520161","indexId":"70031533","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Predicted sedimentary record of reflected bores","docAbstract":"Where a steep slope blocks an inrushing tsunami, the tsunami commonly reverses direction as a reflected bore. A simple method for relating vertical and horizontal variation in sediment size to output from numerical models of depth-averaged tsunami flow yields predictions about the sedimentary record of reflected bores: 1. Near the reflector, a abrupt slowing of the flow as the reflected bore passes is recorded by a normally graded layer that drapes preexisting topography. 2. At intermediate distances from the reflector, the deposit consists of a single normally graded bed deposited preferentially in depressions, possibly including a sharp fine-over-coarse contact. This contact records a brief period of erosion as the front of the reflected bore passes. 3. Far seaward of the reflector, grading in the deposit includes two distinct normally graded beds deposited preferentially in depressions separated by an erosional unconformity. The second normally graded bed records the reflected bore.","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes","conferenceDate":"May 13-17, 2007","conferenceLocation":"New Orleans, LA","language":"English","publisher":"ACSE","doi":"10.1061/40926(239)85","isbn":"0784409269; 9780784409268","usgsCitation":"Higman, B., Gelfenbaum, G., Lynett, P., Moore, A., and Jaffe, B., 2007, Predicted sedimentary record of reflected bores, in Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes, New Orleans, LA, May 13-17, 2007, https://doi.org/10.1061/40926(239)85.","costCenters":[],"links":[{"id":240108,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationDate":"2012-04-26","publicationStatus":"PW","scienceBaseUri":"505a8197e4b0c8380cd7b5f2","contributors":{"authors":[{"text":"Higman, B.","contributorId":63621,"corporation":false,"usgs":true,"family":"Higman","given":"B.","email":"","affiliations":[],"preferred":false,"id":431983,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gelfenbaum, G.","contributorId":72429,"corporation":false,"usgs":true,"family":"Gelfenbaum","given":"G.","email":"","affiliations":[],"preferred":false,"id":431984,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lynett, P.","contributorId":47981,"corporation":false,"usgs":true,"family":"Lynett","given":"P.","email":"","affiliations":[],"preferred":false,"id":431982,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Moore, A.","contributorId":29351,"corporation":false,"usgs":true,"family":"Moore","given":"A.","email":"","affiliations":[],"preferred":false,"id":431981,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Jaffe, B.","contributorId":78517,"corporation":false,"usgs":true,"family":"Jaffe","given":"B.","affiliations":[],"preferred":false,"id":431985,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ]}