{"pageNumber":"2360","pageRowStart":"58975","pageSize":"25","recordCount":185113,"records":[{"id":70029830,"text":"70029830 - 2007 - Distribution and accumulation of mercury in tissues of captive-reared common loon (Gavia immer) chicks","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029830","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":"Distribution and accumulation of mercury in tissues of captive-reared common loon (Gavia immer) chicks","docAbstract":"We determined the distribution and accumulation of Hg in tissues of common loon (Gavia immer) chicks maintained for up to 15 weeks on either a control diet with no added methylmercury chloride (MeHgCl) or one containing either 0.4 or 1.2 ??g Hg (as MeHgCl)/g wet-weight food. Total Hg and MeHg tissue concentrations were strongly positively correlated (r2 > 0.95) with the amount of Hg delivered to individual chicks throughout the course of the experiment. The pattern of differential Hg concentration in internal tissues was consistent within each treatment: Liver > kidney > muscle > carcass > brain. Feather Hg concentrations were consistently higher than those of internal tissues and represented an important route of Hg elimination. Feather mass accounted for 4.3% ?? 0.1% (average ?? standard error) of body mass, yet 27.3% ?? 2.6% of total Hg intake was excreted into feathers. Our calculations indicate that 26.7% ?? 4.9% of ingested Hg was not accounted for and, thus, either was never absorbed or was absorbed and subsequently eliminated in feces. With the additional excretion into feathers, 54% of ingested Hg was excreted. Demethylation was evident in the liver at all treatment levels and in the kidneys of chicks dosed at 1.2 ??g Hg/g. Mercury concentrations were strongly positively correlated (r2 ??? 0.95) among internal tissues and with blood Hg concentration. Mercury concentrations of secondary feathers were moderately correlated (r2 = 0.82-0.93) with internal tissues. We supply regression models that may be used to provide perspective and a useful means of interpreting the variety of measures of Hg exposure reported in the literature. ?? 2007 SETAC.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Toxicology and Chemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1897/06-193R.1","issn":"07307268","usgsCitation":"Kenow, K., Meyer, M., Hines, R.K., and Karasov, W.H., 2007, Distribution and accumulation of mercury in tissues of captive-reared common loon (Gavia immer) chicks: Environmental Toxicology and Chemistry, v. 26, no. 5, p. 1047-1055, https://doi.org/10.1897/06-193R.1.","startPage":"1047","endPage":"1055","numberOfPages":"9","costCenters":[],"links":[{"id":212683,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1897/06-193R.1"},{"id":240208,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"26","issue":"5","noUsgsAuthors":false,"publicationDate":"2007-05-01","publicationStatus":"PW","scienceBaseUri":"505a027ae4b0c8380cd50075","contributors":{"authors":[{"text":"Kenow, K.P.","contributorId":18302,"corporation":false,"usgs":true,"family":"Kenow","given":"K.P.","affiliations":[],"preferred":false,"id":424512,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Meyer, M.W.","contributorId":38094,"corporation":false,"usgs":true,"family":"Meyer","given":"M.W.","email":"","affiliations":[],"preferred":false,"id":424515,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hines, R. K.","contributorId":27819,"corporation":false,"usgs":true,"family":"Hines","given":"R.","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":424514,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Karasov, W. H.","contributorId":25889,"corporation":false,"usgs":false,"family":"Karasov","given":"W.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":424513,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70029827,"text":"70029827 - 2007 - Cascading events in linked ecological and socioeconomic systems","interactions":[],"lastModifiedDate":"2018-01-23T11:07:45","indexId":"70029827","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1701,"text":"Frontiers in Ecology and the Environment","active":true,"publicationSubtype":{"id":10}},"title":"Cascading events in linked ecological and socioeconomic systems","docAbstract":"<p>Cascading events that start at small spatial scales and propagate non-linearly through time to influence larger areas often have major impacts on ecosystem goods and services. Events such as wildfires and hurricanes are increasing in frequency and magnitude as systems become more connected through globalization processes. We need to improve our understanding of these events in order to predict their occurrence, minimize potential impacts, and allow for strategic recovery. Here, we synthesize information about cascading events in systems located throughout the Americas. We discuss a variety of examples of cascading events that share a common feature: they are often driven by linked ecological and human processes across scales. In this era of globalization, we recommend studies that explicitly examine connections across scales and examine the role of connectivity among non-contiguous as well as contiguous areas.</p>","language":"English","publisher":"Wiley","doi":"10.1890/1540-9295(2007)5[221:CEILEA]2.0.CO;2","usgsCitation":"Peters, D., Sala, O., Allen, C.D., Covich, A., and Brunson, M., 2007, Cascading events in linked ecological and socioeconomic systems: Frontiers in Ecology and the Environment, v. 5, no. 4, p. 221-224, https://doi.org/10.1890/1540-9295(2007)5[221:CEILEA]2.0.CO;2.","productDescription":"4 p.","startPage":"221","endPage":"224","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":240174,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"5","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f387e4b0c8380cd4b86f","contributors":{"authors":[{"text":"Peters, Debra P. C.","contributorId":36903,"corporation":false,"usgs":false,"family":"Peters","given":"Debra P. C.","affiliations":[{"id":25579,"text":"USDA-ARS Jornada Experimental Range, Las Cruces, NM 88003","active":true,"usgs":false}],"preferred":false,"id":424497,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sala, O.E.","contributorId":96638,"corporation":false,"usgs":true,"family":"Sala","given":"O.E.","email":"","affiliations":[],"preferred":false,"id":424500,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Allen, Craig D. 0000-0002-8777-5989 craig_allen@usgs.gov","orcid":"https://orcid.org/0000-0002-8777-5989","contributorId":2597,"corporation":false,"usgs":true,"family":"Allen","given":"Craig","email":"craig_allen@usgs.gov","middleInitial":"D.","affiliations":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true},{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":424498,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Covich, A.","contributorId":30042,"corporation":false,"usgs":true,"family":"Covich","given":"A.","affiliations":[],"preferred":false,"id":424496,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Brunson, M.","contributorId":65443,"corporation":false,"usgs":true,"family":"Brunson","given":"M.","email":"","affiliations":[],"preferred":false,"id":424499,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70029826,"text":"70029826 - 2007 - Assessment of contamination from arsenical pesticide use on orchards in the great valley region, Virginia and West Virginia, USA","interactions":[],"lastModifiedDate":"2018-11-19T10:26:16","indexId":"70029826","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2262,"text":"Journal of Environmental Quality","active":true,"publicationSubtype":{"id":10}},"title":"Assessment of contamination from arsenical pesticide use on orchards in the great valley region, Virginia and West Virginia, USA","docAbstract":"<p>Lead arsenate pesticides were widely used in apple orchards from 1925 to 1955. Soils from historic orchards in four counties in Virginia and West Virginia contained elevated concentrations of As and Pb, consistent with an arsenical pesticide source. Arsenic concentrations in approximately 50% of the orchard site soils and approximately 1% of reference site soils exceed the USEPA Preliminary Remediation Goal (PRG) screening guideline of 22 mg kg-1 for As in residential soi, defined on the basis of combined chronic exposure risk. Approximately 5% of orchard site soils exceed the USEPA PRG for Pb of 400 mg kg-1 in residential soil; no reference site soils sampled exceed this value. A variety of statistical methods were used to characterize the occurrence, distribution, and dispersion of arsenical pesticide residues in soils, stream sediments, and ground waters relative to landscape features and likely background conditions. Concentrations of Zn, Pb, and Cu were most strongly associated with high developed land density and population density, whereas elevated concentrations of As were weakly correlated with high orchard density, consistent with a pesticide residue source. Arsenic concentrations in ground water wells in the region are generally &lt;0.005 mg L-1. There was no spatial association between As concentrations in ground water and proximity to orchards. Arsenic had limited mobility into ground water from surface soils contaminated with arsenical pesticide residues at concentrations typically found in orchards.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Environmental Quality","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2134/jeq2006.0413","issn":"00472425","usgsCitation":"Robinson, G.R., Larkins, P., Boughton, C.J., Reed, B.W., and Sibrell, P.L., 2007, Assessment of contamination from arsenical pesticide use on orchards in the great valley region, Virginia and West Virginia, USA: Journal of Environmental Quality, v. 36, no. 3, p. 654-663, https://doi.org/10.2134/jeq2006.0413.","productDescription":"10 p.","startPage":"654","endPage":"663","costCenters":[{"id":245,"text":"Eastern Mineral and Environmental Resources Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240680,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213091,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2134/jeq2006.0413"}],"country":"United States","volume":"36","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ee28e4b0c8380cd49bc7","contributors":{"authors":[{"text":"Robinson, Gilpin R. Jr. grobinso@usgs.gov","contributorId":3083,"corporation":false,"usgs":true,"family":"Robinson","given":"Gilpin","suffix":"Jr.","email":"grobinso@usgs.gov","middleInitial":"R.","affiliations":[{"id":245,"text":"Eastern Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":false,"id":424491,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Larkins, Peter","contributorId":40691,"corporation":false,"usgs":true,"family":"Larkins","given":"Peter","email":"","affiliations":[],"preferred":false,"id":424493,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Boughton, Carol J.","contributorId":27429,"corporation":false,"usgs":true,"family":"Boughton","given":"Carol","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":424494,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Reed, Bradley W.","contributorId":15300,"corporation":false,"usgs":true,"family":"Reed","given":"Bradley","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":424495,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Sibrell, Philip L. psibrell@usgs.gov","contributorId":2006,"corporation":false,"usgs":true,"family":"Sibrell","given":"Philip","email":"psibrell@usgs.gov","middleInitial":"L.","affiliations":[{"id":365,"text":"Leetown Science Center","active":true,"usgs":true}],"preferred":false,"id":424492,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70029824,"text":"70029824 - 2007 - Interactions between slimy sculpin and trout: Slimy sculpin growth and diet in relation to native and nonnative trout","interactions":[],"lastModifiedDate":"2012-03-12T17:21:34","indexId":"70029824","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3624,"text":"Transactions of the American Fisheries Society","active":true,"publicationSubtype":{"id":10}},"title":"Interactions between slimy sculpin and trout: Slimy sculpin growth and diet in relation to native and nonnative trout","docAbstract":"To investigate whether introductions of nonnative trout affect growth and diet of nongame fish in small streams, we designed a field experiment to examine interactions between slimy sculpin Cottus cognatus and native brook trout Salvelinus fontinalis or nonnative brown trout Salmo trutta. We hypothesized that brown trout would compete with and reduce growth of slimy sculpin. We expected no change in slimy sculpin growth in treatments with brook trout because the two species co-occur in their native range and thus may have evolved methods to partition resources and decrease competitive interactions. Enclosures (1 m2) were stocked with (1) juvenile brown trout and slimy sculpin, (2) juvenile brook trout and slimy sculpin, or (3) slimy sculpin alone (control). Fish were stocked at three densities to examine intraspecific versus interspecific competition. Replicates of each treatment were placed in riffles in Valley Creek, Minnesota, and six experimental trials were conducted over three summers (2002-2004). Brown trout presence was associated with reduced growth of large slimy sculpin in enclosures, whereas brook trout presence produced no change in slimy sculpin growth; these effects did not depend on fish density. Brown trout or brook trout presence was not associated with shifts in the diets of slimy sculpin, indicating that reduced slimy sculpin growth in the presence of brown trout was not due to prey selection or prey availability changes. Our research suggests that effects on growth of slimy sculpin in Valley Creek differ between introduced brown trout and native brook trout; however, the mechanisms underlying changes in slimy sculpin growth are unclear. Although brook trout and brown trout appear to fill similar ecological roles in small, coldwater streams, brown trout may negatively impact growth of nongame fish. ?? Copyright by the American Fisheries Society 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Transactions of the American Fisheries Society","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1577/T06-020.1","issn":"00028487","usgsCitation":"Zimmerman, J.K., and Vondracek, B., 2007, Interactions between slimy sculpin and trout: Slimy sculpin growth and diet in relation to native and nonnative trout: Transactions of the American Fisheries Society, v. 136, no. 6, p. 1791-1800, https://doi.org/10.1577/T06-020.1.","startPage":"1791","endPage":"1800","numberOfPages":"10","costCenters":[],"links":[{"id":240648,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213064,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/T06-020.1"}],"volume":"136","issue":"6","noUsgsAuthors":false,"publicationDate":"2011-01-09","publicationStatus":"PW","scienceBaseUri":"505a3cc6e4b0c8380cd63027","contributors":{"authors":[{"text":"Zimmerman, J. K. H.","contributorId":105898,"corporation":false,"usgs":false,"family":"Zimmerman","given":"J.","email":"","middleInitial":"K. H.","affiliations":[],"preferred":false,"id":424480,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Vondracek, B.","contributorId":69930,"corporation":false,"usgs":true,"family":"Vondracek","given":"B.","affiliations":[],"preferred":false,"id":424479,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029823,"text":"70029823 - 2007 - Calibrating a forest landscape model to simulate frequent fire in Mediterranean-type shrublands","interactions":[],"lastModifiedDate":"2012-03-12T17:21:34","indexId":"70029823","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":"Calibrating a forest landscape model to simulate frequent fire in Mediterranean-type shrublands","docAbstract":"In Mediterranean-type ecosystems (MTEs), fire disturbance influences the distribution of most plant communities, and altered fire regimes may be more important than climate factors in shaping future MTE vegetation dynamics. Models that simulate the high-frequency fire and post-fire response strategies characteristic of these regions will be important tools for evaluating potential landscape change scenarios. However, few existing models have been designed to simulate these properties over long time frames and broad spatial scales. We refined a landscape disturbance and succession (LANDIS) model to operate on an annual time step and to simulate altered fire regimes in a southern California Mediterranean landscape. After developing a comprehensive set of spatial and non-spatial variables and parameters, we calibrated the model to simulate very high fire frequencies and evaluated the simulations under several parameter scenarios representing hypotheses about system dynamics. The goal was to ensure that observed model behavior would simulate the specified fire regime parameters, and that the predictions were reasonable based on current understanding of community dynamics in the region. After calibration, the two dominant plant functional types responded realistically to different fire regime scenarios. Therefore, this model offers a new alternative for simulating altered fire regimes in MTE landscapes. ?? 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.2007.01.004","issn":"13648152","usgsCitation":"Syphard, A., Yang, J., Franklin, J., He, H., and Keeley, J., 2007, Calibrating a forest landscape model to simulate frequent fire in Mediterranean-type shrublands: Environmental Modelling and Software, v. 22, no. 11, p. 1641-1653, https://doi.org/10.1016/j.envsoft.2007.01.004.","startPage":"1641","endPage":"1653","numberOfPages":"13","costCenters":[],"links":[{"id":240647,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213063,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.envsoft.2007.01.004"}],"volume":"22","issue":"11","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f30ce4b0c8380cd4b58b","contributors":{"authors":[{"text":"Syphard, A.D.","contributorId":68950,"corporation":false,"usgs":true,"family":"Syphard","given":"A.D.","email":"","affiliations":[],"preferred":false,"id":424475,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Yang, J.","contributorId":60780,"corporation":false,"usgs":true,"family":"Yang","given":"J.","email":"","affiliations":[],"preferred":false,"id":424474,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Franklin, J.","contributorId":81546,"corporation":false,"usgs":false,"family":"Franklin","given":"J.","email":"","affiliations":[],"preferred":false,"id":424477,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"He, H.S.","contributorId":98852,"corporation":false,"usgs":true,"family":"He","given":"H.S.","email":"","affiliations":[],"preferred":false,"id":424478,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Keeley, Jon E. 0000-0002-4564-6521","orcid":"https://orcid.org/0000-0002-4564-6521","contributorId":69082,"corporation":false,"usgs":true,"family":"Keeley","given":"Jon E.","affiliations":[],"preferred":false,"id":424476,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70029822,"text":"70029822 - 2007 - Mercury speciation in piscivorous fish from mining-impacted reservoirs","interactions":[],"lastModifiedDate":"2023-08-25T12:03:45.955029","indexId":"70029822","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Mercury speciation in piscivorous fish from mining-impacted reservoirs","docAbstract":"<p>Guadalupe Reservoir (GUA), California, and Lahontan Reservoir (LAH), Nevada, U.S. are both affected either directly or indirectly by the legacy of gold and silver mining in the Sierra Nevada during the nineteenth century. Analysis of total mercury in fish from these lentic systems consistently indicate elevated concentrations (&gt;1 μg·g-1 wet weight; hereinafter, all concentrations are reported as wet weight unless indicated otherwise) well above the U.S. Environmenal Protection Agency's human consumption advisory level for fish (&lt;0.3 μg·g-1). Replicate X-ray absorption near edge structure (XANES) analyses on largemouth bass and hybrid striped bass from GUA and LAH were performed to determine predominant chemical species of mercury accumulated by these high-trophic-level piscivores that are exposed to elevated mercury through trophic transfer in mining-impacted lentic systems. Despite distinct differences in mercury source, the proximity of the source, and concentrations of complexing ligands, results of XANES analysis clearly indicated that mercury accumulated in these individual fish from the two reservoirs were dominated by methylmercury cysteine complexes. These findings are consistent with results from commercial fish species inhabiting marine environments which are presumed to include differing mercury sources (e.g., atmospheric, hydrothermal, or benthic). The dominance of methylmercury cysteine complexes in muscle tissues of fish obtained from such contrasting environments and exposure conditions suggests that a generic toxicological model for the consumption of fish could be applicable over a wide range of ecologic settings.</p>","language":"English","publisher":"American Chemical Society","doi":"10.1021/es0628856","issn":"0013936X","usgsCitation":"Kuwabara, J.S., Arai, Y., Topping, B.R., Pickering, I., and George, G., 2007, Mercury speciation in piscivorous fish from mining-impacted reservoirs: Environmental Science & Technology, v. 41, no. 8, p. 2745-2749, https://doi.org/10.1021/es0628856.","productDescription":"5 p.","startPage":"2745","endPage":"2749","numberOfPages":"5","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240616,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","volume":"41","issue":"8","noUsgsAuthors":false,"publicationDate":"2007-03-08","publicationStatus":"PW","scienceBaseUri":"505a542fe4b0c8380cd6cee0","contributors":{"authors":[{"text":"Kuwabara, James S. 0000-0003-2502-1601 kuwabara@usgs.gov","orcid":"https://orcid.org/0000-0003-2502-1601","contributorId":3374,"corporation":false,"usgs":true,"family":"Kuwabara","given":"James","email":"kuwabara@usgs.gov","middleInitial":"S.","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":424470,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Arai, Yuji","contributorId":98989,"corporation":false,"usgs":true,"family":"Arai","given":"Yuji","email":"","affiliations":[],"preferred":false,"id":424471,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Topping, Brent R. 0000-0002-7887-4221 btopping@usgs.gov","orcid":"https://orcid.org/0000-0002-7887-4221","contributorId":1484,"corporation":false,"usgs":true,"family":"Topping","given":"Brent","email":"btopping@usgs.gov","middleInitial":"R.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":424472,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Pickering, I.J.","contributorId":6668,"corporation":false,"usgs":true,"family":"Pickering","given":"I.J.","email":"","affiliations":[],"preferred":false,"id":424469,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"George, G.N.","contributorId":102693,"corporation":false,"usgs":true,"family":"George","given":"G.N.","email":"","affiliations":[],"preferred":false,"id":424473,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70029820,"text":"70029820 - 2007 - Review of the crevalle jacks, Caranx hippos complex (Teleostei: Carangidae), with a description of a new species from West Africa","interactions":[],"lastModifiedDate":"2012-03-12T17:21:05","indexId":"70029820","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1663,"text":"Fishery Bulletin","printIssn":"0090-0656","active":true,"publicationSubtype":{"id":10}},"title":"Review of the crevalle jacks, Caranx hippos complex (Teleostei: Carangidae), with a description of a new species from West Africa","docAbstract":"The Caranx hippos species complex comprises three extant species: crevalle jack (Caranx hippos) (Linnaeus, 1766) from both the western and eastern Atlantic oceans; Pacific crevalle jack (Caranx caninus) Gu??nther, 1868 from the eastern Pacific Ocean; and longfin crevalle jack (Caranx fischeri) new species, from the eastern Atlantic, including the Mediterranean Sea and Ascension Island. Adults of all three species are superficially similar with a black blotch on the lower half of the pectoral fin, a black spot on the upper margin of opercle, one or two pairs of enlarged symphyseal canines on the lower jaw, and a similar pattern of breast squamation. Each species has a different pattern of hyperostotic bone development and anal-fin color. The two sympatric eastern Atlantic species also differ from each other in number of dorsal- and anal-fin rays, and in large adults of C. fischeri the lobes of these fins are longer and the body is deeper. Caranx hippos from opposite sides of the Atlantic are virtually indistinguishable externally but differ consistently in the expression of hyperostosis of the first dorsal-fin pterygiophore. The fossil species Caranx carangopsis Steindachner 1859 appears to have been based on composite material of Trachurus sp. and a fourth species of the Caranx hippos complex. Patterns of hyperostotic bone development are compared in the nine (of 15 total) species of Caranx sensu stricto that exhibit hyperostosis.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Fishery Bulletin","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00900656","usgsCitation":"Smith-Vaniz, W., and Carpenter, K., 2007, Review of the crevalle jacks, Caranx hippos complex (Teleostei: Carangidae), with a description of a new species from West Africa: Fishery Bulletin, v. 105, no. 2, p. 207-233.","startPage":"207","endPage":"233","numberOfPages":"27","costCenters":[],"links":[{"id":240582,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"105","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aac8ae4b0c8380cd86d6a","contributors":{"authors":[{"text":"Smith-Vaniz, W. F.","contributorId":20684,"corporation":false,"usgs":true,"family":"Smith-Vaniz","given":"W. F.","affiliations":[],"preferred":false,"id":424465,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Carpenter, K.E.","contributorId":28076,"corporation":false,"usgs":true,"family":"Carpenter","given":"K.E.","email":"","affiliations":[],"preferred":false,"id":424466,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029818,"text":"70029818 - 2007 - Hydrologic significance of carbon monoxide concentrations in ground water","interactions":[],"lastModifiedDate":"2018-10-16T10:55:13","indexId":"70029818","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":"Hydrologic significance of carbon monoxide concentrations in ground water","docAbstract":"<p><span>Dissolved carbon monoxide (CO) is present in ground water produced from a variety of aquifer systems at concentrations ranging from 0.2 to 20 nanomoles per liter (0.0056 to 0.56 μg/L). In two shallow aquifers, one an unconsolidated coastal plain aquifer in Kings Bay, Georgia, and the other a fractured‐bedrock aquifer in West Trenton, New Jersey, long‐term monitoring showed that CO concentrations varied over time by as much as a factor of 10. Field and laboratory evidence suggests that the delivery of dissolved oxygen to the soil zone and underlying aquifers by periodic recharge events stimulates oxic metabolism and produces transiently high CO concentrations. In between recharge events, the aquifers become anoxic and more substrate limited, CO is consumed as a carbon source, and CO concentrations decrease. According to this model, CO concentrations provide a transient record of oxic metabolism affecting ground water systems&nbsp;</span><i>after<span>&nbsp;</span></i><span>dissolved oxygen has been fully consumed. Because the delivery of oxygen affects the fate and transport of natural and anthropogenic contaminants in ground water, CO concentration changes may be useful for identifying predominantly anoxic ground water systems subject to periodic oxic or microaerophilic conditions.</span></p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1745-6584.2007.00284.x","issn":"0017467X","usgsCitation":"Chapelle, F.H., and Bradley, P.M., 2007, Hydrologic significance of carbon monoxide concentrations in ground water: Ground Water, v. 45, no. 3, p. 272-280, https://doi.org/10.1111/j.1745-6584.2007.00284.x.","productDescription":"9 p.","startPage":"272","endPage":"280","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240551,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212976,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6584.2007.00284.x"}],"volume":"45","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-03-12","publicationStatus":"PW","scienceBaseUri":"505a368ae4b0c8380cd607c7","contributors":{"authors":[{"text":"Chapelle, Francis H. chapelle@usgs.gov","contributorId":1350,"corporation":false,"usgs":true,"family":"Chapelle","given":"Francis","email":"chapelle@usgs.gov","middleInitial":"H.","affiliations":[{"id":559,"text":"South Carolina Water Science Center","active":true,"usgs":true},{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"preferred":true,"id":424458,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bradley, Paul M. 0000-0001-7522-8606 pbradley@usgs.gov","orcid":"https://orcid.org/0000-0001-7522-8606","contributorId":361,"corporation":false,"usgs":true,"family":"Bradley","given":"Paul","email":"pbradley@usgs.gov","middleInitial":"M.","affiliations":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"preferred":true,"id":424457,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029816,"text":"70029816 - 2007 - East asian gold: Deciphering the anomaly of phanerozoic gold in precambrian cratons","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029816","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":"East asian gold: Deciphering the anomaly of phanerozoic gold in precambrian cratons","docAbstract":"Early Cretaceous orogenic gold deposits in eastern Asia are globally unique in that large Phanerozoic lode gold deposits occur in Archean-Paleoproterozoic cratons. In the northern Pacific region, ca. 125 Ma orogenic gold deposits in the North China, Yangzte, and Siberian craton margins, as well as in young terranes in California, may ultimately relate to the giant Cretaceous mantle plume in the southern Pacific basin and the relatively rapid tectonic consequences along both continental margins from resulting Pacific plate reconfigurations. In eastern Asia, such consequences include reactivation of and fluid flow along major fault systems, with fluid focusing into simultaneously forming, isolated core complexes of uncertain genesis. Deposition of gold ores in previously devolatilized high-grade Precambrian metamorphic rocks requires an exotic source of ore fluid, most likely subducted Mesozoic oceanic crust and/or overlying sediment. An implication is that Phanerozoic metamorphic core complexes in other destabilized craton margins could host large gold resources. ?? 2007 by Economic Geology.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Economic Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2113/gsecongeo.102.3.341","issn":"03610128","usgsCitation":"Goldfarb, R., Hart, C., Davis, G., and Groves, D., 2007, East asian gold: Deciphering the anomaly of phanerozoic gold in precambrian cratons: Economic Geology, v. 102, no. 3, p. 341-345, https://doi.org/10.2113/gsecongeo.102.3.341.","startPage":"341","endPage":"345","numberOfPages":"5","costCenters":[],"links":[{"id":212949,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/gsecongeo.102.3.341"},{"id":240519,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"102","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a052fe4b0c8380cd50cc5","contributors":{"authors":[{"text":"Goldfarb, R.J.","contributorId":38143,"corporation":false,"usgs":true,"family":"Goldfarb","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":424450,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hart, C.","contributorId":33472,"corporation":false,"usgs":true,"family":"Hart","given":"C.","email":"","affiliations":[],"preferred":false,"id":424449,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Davis, G.","contributorId":17343,"corporation":false,"usgs":true,"family":"Davis","given":"G.","affiliations":[],"preferred":false,"id":424448,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Groves, D.","contributorId":46311,"corporation":false,"usgs":true,"family":"Groves","given":"D.","email":"","affiliations":[],"preferred":false,"id":424451,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70029815,"text":"70029815 - 2007 - New isotopic evidence for the origin of groundwater from the Nubian Sandstone Aquifer in the Negev, Israel","interactions":[],"lastModifiedDate":"2023-08-25T11:11:42.519948","indexId":"70029815","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":835,"text":"Applied Geochemistry","active":true,"publicationSubtype":{"id":10}},"title":"New isotopic evidence for the origin of groundwater from the Nubian Sandstone Aquifer in the Negev, Israel","docAbstract":"<p><span>The geochemistry and isotopic composition (H, O, S, O</span><sub>sulfate</sub><span>, C, Sr) of groundwater from the Nubian Sandstone (Kurnub Group) aquifer in the Negev, Israel, were investigated in an attempt to reconstruct the origin of the water and solutes, evaluate modes of water–rock interactions, and determine mean residence times of the water. The results indicate multiple recharge events into the Nubian sandstone aquifer characterized by distinctive isotope signatures and deuterium excess values. In the northeastern Negev, groundwater was identified with deuterium excess values of ∼16‰, which suggests local recharge via unconfined areas of the aquifer in the Negev anticline systems. The&nbsp;</span><i>δ</i><sup>18</sup><span>O</span><sub>H2O</sub><span>&nbsp;and&nbsp;</span><i>δ</i><sup>2</sup><span>H values (−6.5‰ and −35.4‰) of this groundwater are higher than those of groundwater in the Sinai Peninsula and southern Arava valley (−7.5‰ and −48.3‰) that likewise have lower deuterium excess values of ∼10‰. Based on the geochemical differences between groundwater in the unconfined and confined zones of the aquifer, a conceptual geochemical model for the evolution of the groundwater in the Nubian sandstone aquifer has been reconstructed. The isotopic composition of shallow groundwater from the unconfined zone indicates that during recharge oxidation of pyrite to SO</span><sub>4</sub><span>&nbsp;(</span><i>δ</i><sup>34</sup><span>S</span><sub>SO4</sub><span>&nbsp;∼−13‰;&nbsp;</span><i>δ</i><sup>18</sup><span>O</span><sub>SO4</sub><span>&nbsp;∼+7.7‰) and dissolution of CaCO</span><sub>3</sub><span>&nbsp;(</span><sup>87</sup><span>Sr/</span><sup>86</sup><span>Sr ∼0.70787;&nbsp;</span><i>δ</i><sup>13</sup><span>C</span><sub>DIC</sub><span>&nbsp;</span><span>=</span><span>&nbsp;</span><span>−3.7‰) occur. In the confined zone of the aquifer, bacterial SO</span><sub>4</sub><span>&nbsp;reduction removes a significant part of dissolved&nbsp;</span><span class=\"math\"><span id=\"MathJax-Element-1-Frame\" class=\"MathJax_SVG\" data-mathml=\"<math xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;><mrow is=&quot;true&quot;><msubsup is=&quot;true&quot;><mrow is=&quot;true&quot;><mtext is=&quot;true&quot;>SO</mtext></mrow><mrow is=&quot;true&quot;><mn is=&quot;true&quot;>4</mn></mrow><mrow is=&quot;true&quot;><mn is=&quot;true&quot;>2</mn><mo is=&quot;true&quot;>-</mo></mrow></msubsup></mrow></math>\"><span class=\"MJX_Assistive_MathML\">SO42-</span></span></span><span>, thereby modifying its isotopic composition (</span><i>δ</i><sup>34</sup><span>S</span><sub>SO4</sub><span>&nbsp;∼−2‰;&nbsp;</span><i>δ</i><sup>18</sup><span>O</span><sub>SO4</sub><span>&nbsp;∼+8.5‰) and liberating dissolved inorganic C that contains little or no radiocarbon (</span><sup>14</sup><span>C-free) with low&nbsp;</span><i>δ</i><sup>13</sup><span>C</span><sub>DIC</sub><span>&nbsp;values (&lt;−12‰). In addition to local recharge, the Sr and S isotopic data revealed contribution of external groundwater sources to the Nubian Sandstone aquifer, resulting in further modifications of the groundwater chemical and isotopic signatures. In the northeastern Negev, it is shown that SO</span><sub>4</sub><span>-rich groundwater from the underlying Jurassic aquifer contributes significantly to the salt budget of the Nubian Sandstone aquifer. The unique chemical and isotopic composition of the Jurassic groundwater (</span><i>δ</i><sup>34</sup><span>S</span><sub>SO4</sub><span>&nbsp;</span><span>∼</span><span>&nbsp;</span><span>+14‰;&nbsp;</span><i>δ</i><sup>18</sup><span>O</span><sub>SO4</sub><span>&nbsp;</span><span>∼</span><span>&nbsp;</span><span>14‰;&nbsp;</span><sup>87</sup><span>Sr/</span><sup>86</sup><span>Sr ∼0.70764) is interpreted as reflecting dissolution of Late Triassic marine gypsum deposits. In the southern Arava Valley the authors postulate that SO</span><sub>4</sub><span>-rich groundwater with distinctively high Br/Cl (3</span><span>&nbsp;</span><span>×</span><span>&nbsp;</span><span>10</span><sup>−3</sup><span>) low&nbsp;</span><sup>87</sup><span>Sr/</span><sup>86</sup><span>Sr (0.70734), and high&nbsp;</span><i>δ</i><sup>34</sup><span>S</span><sub>SO4</sub><span>&nbsp;values (+15‰) is derived from mixing with underlying brines from the Paleozoic units. The radiocarbon measurements reveal low&nbsp;</span><sup>14</sup><span>C activities (0.2–5.8 pmc) in both the northeastern Negev and southern Arava Valley. Taking into account dissolution of carbonate rocks and bacterial SO</span><sub>4</sub><span>&nbsp;reduction in the unconfined area, estimated mean residence times of groundwater in the confined zone in the northeastern Negev are on the order of 21–38 ka, which suggests recharge predominantly during the last glacial period. The&nbsp;</span><sup>14</sup><span>C signal in groundwater from the southern Arava Valley is equally low but due to evidence for mixing with external water sources the residence time estimates are questionable.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.apgeochem.2007.01.005","issn":"08832927","usgsCitation":"Vengosh, A., Hening, S., Ganor, J., Mayer, B., Weyhenmeyer, C., Bullen, T., and Paytan, A., 2007, New isotopic evidence for the origin of groundwater from the Nubian Sandstone Aquifer in the Negev, Israel: Applied Geochemistry, v. 22, no. 5, p. 1052-1073, https://doi.org/10.1016/j.apgeochem.2007.01.005.","productDescription":"22 p.","startPage":"1052","endPage":"1073","numberOfPages":"22","costCenters":[],"links":[{"id":240518,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Israel","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[35.71992,32.70919],[35.54567,32.39399],[35.54525,31.7825],[35.39756,31.48909],[35.42092,31.10007],[34.9226,29.50133],[34.26543,31.21936],[34.55637,31.54882],[34.48811,31.60554],[34.75259,32.07293],[34.95542,32.82738],[35.09846,33.08054],[35.12605,33.0909],[35.46071,33.08904],[35.5528,33.26427],[35.8211,33.27743],[35.8364,32.86812],[35.7008,32.71601],[35.71992,32.70919]]]},\"properties\":{\"name\":\"Israel\"}}]}","volume":"22","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a65e0e4b0c8380cd72c7d","contributors":{"authors":[{"text":"Vengosh, A.","contributorId":88925,"corporation":false,"usgs":true,"family":"Vengosh","given":"A.","affiliations":[],"preferred":false,"id":424446,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hening, S.","contributorId":15835,"corporation":false,"usgs":true,"family":"Hening","given":"S.","email":"","affiliations":[],"preferred":false,"id":424441,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ganor, J.","contributorId":33128,"corporation":false,"usgs":true,"family":"Ganor","given":"J.","email":"","affiliations":[],"preferred":false,"id":424443,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Mayer, B.","contributorId":84538,"corporation":false,"usgs":true,"family":"Mayer","given":"B.","email":"","affiliations":[],"preferred":false,"id":424445,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Weyhenmeyer, C.E.","contributorId":26143,"corporation":false,"usgs":true,"family":"Weyhenmeyer","given":"C.E.","email":"","affiliations":[],"preferred":false,"id":424442,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Bullen, T.D.","contributorId":79911,"corporation":false,"usgs":true,"family":"Bullen","given":"T.D.","email":"","affiliations":[],"preferred":false,"id":424444,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Paytan, A.","contributorId":98926,"corporation":false,"usgs":true,"family":"Paytan","given":"A.","affiliations":[],"preferred":false,"id":424447,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70029814,"text":"70029814 - 2007 - Comparison of diet, reproductive biology, and growth of the pig frog (Rana grylio) from harvested and protected areas of the Florida Everglades","interactions":[],"lastModifiedDate":"2015-12-10T11:46:32","indexId":"70029814","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1337,"text":"Copeia","active":true,"publicationSubtype":{"id":10}},"title":"Comparison of diet, reproductive biology, and growth of the pig frog (Rana grylio) from harvested and protected areas of the Florida Everglades","docAbstract":"<p>Distinct differences in body size exist among three Rana grylio populations in areas of the Florida Everglades that differ in frog harvest pressure and hydroperiod. Frogs from two populations are harvested regularly throughout the year, while those in the third are protected from harvest. We compared seasonal and sex differences in diet, reproduction, and growth across these populations to examine life-history patterns. By volume, crayfish and anurans were the most abundant prey items for all adults across sites. Frogs from drier sites consumed more crayfish than frogs from the wettest site. Anurans were abundant in the diet during the wet season, while crayfish and fish were abundant during the dry season. More frogs with empty stomachs were captured during the wet season than the dry season. Feeding, growth, and fat deposition were greatest during the dry season across all sites. Although females were found in all reproductive stages throughout the year, the highest percentage of females had mature ova during the late dry season and spent ovaries during the early wet season. Individual patterns of growth were similar across all sites and matched historical growth data from the 1950s. Differences in body size among sites were most likely attributable to differential mortality (i.e., harvest pressure, predation) rather than to differences in food access or growth. ?? 2007 by the American Society of Ichthyologists and Herpetologists.</p>","language":"English","publisher":"The American Society of Ichthyologists and Herpetologists","doi":"10.1643/0045-8511(2007)7[436:CODRBA]2.0.CO;2","issn":"00458511","usgsCitation":"Ugarte, C., Rice, K., and Donnelly, M., 2007, Comparison of diet, reproductive biology, and growth of the pig frog (Rana grylio) from harvested and protected areas of the Florida Everglades: Copeia, no. 2, p. 436-448, https://doi.org/10.1643/0045-8511(2007)7[436:CODRBA]2.0.CO;2.","productDescription":"13 p.","startPage":"436","endPage":"448","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":240487,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f85ae4b0c8380cd4d04c","contributors":{"authors":[{"text":"Ugarte, C.A.","contributorId":29645,"corporation":false,"usgs":true,"family":"Ugarte","given":"C.A.","email":"","affiliations":[],"preferred":false,"id":424438,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rice, K.G. 0000-0001-8282-1088","orcid":"https://orcid.org/0000-0001-8282-1088","contributorId":41949,"corporation":false,"usgs":true,"family":"Rice","given":"K.G.","affiliations":[],"preferred":false,"id":424439,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Donnelly, M.A.","contributorId":78845,"corporation":false,"usgs":true,"family":"Donnelly","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":424440,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029813,"text":"70029813 - 2007 - Progress in the development of shallow-water mapping systems","interactions":[],"lastModifiedDate":"2018-02-06T10:14:12","indexId":"70029813","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3363,"text":"Sea Technology","active":true,"publicationSubtype":{"id":10}},"title":"Progress in the development of shallow-water mapping systems","docAbstract":"The USGS (US Geological Survey) Coastal and Marine Geology has deployed an advance autonomous shallow-draft robotic vehicle, Iris, for shallow-water mapping in Apalachicola Bay, Florida. The vehicle incorporates a side scan sonar system, seismic-reflection profiler, single-beam echosounder, and global positioning system (GPS) navigation. It is equipped with an onboard microprocessor-based motor controller, delivering signals for speed and steering to hull-mounted brushless direct-current thrusters. An onboard motion sensor in the Sea Robotics vehicle control system enclosure has been integrated in the vehicle to measure the vehicle heave, pitch, roll, and heading. Three water-tight enclosures are mounted along the vehicle axis for the Edgetech computer and electronics system including the Sea Robotics computer, a control and wireless communications system, and a Thales ZXW real-time kinematic (RTK) GPS receiver. The vehicle has resulted in producing high-quality seismic reflection and side scan sonar data, which will help in developing the baseline oyster habitat maps.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Sea Technology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00933651","usgsCitation":"Bergeron, E., Worley, C., and O'Brien, T., 2007, Progress in the development of shallow-water mapping systems: Sea Technology, v. 48, no. 6, p. 10-15.","productDescription":"6 p.","startPage":"10","endPage":"15","numberOfPages":"6","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true},{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":240486,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"48","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a8e6fe4b0c8380cd7f1c4","contributors":{"authors":[{"text":"Bergeron, E.","contributorId":94103,"corporation":false,"usgs":true,"family":"Bergeron","given":"E.","email":"","affiliations":[],"preferred":false,"id":424437,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Worley, C.R.","contributorId":43479,"corporation":false,"usgs":true,"family":"Worley","given":"C.R.","email":"","affiliations":[],"preferred":false,"id":424435,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"O'Brien, T.","contributorId":46767,"corporation":false,"usgs":true,"family":"O'Brien","given":"T.","affiliations":[],"preferred":false,"id":424436,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029812,"text":"70029812 - 2007 - Circum-Arctic petroleum systems identified using decision-tree chemometrics","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029812","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":701,"text":"American Association of Petroleum Geologists Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Circum-Arctic petroleum systems identified using decision-tree chemometrics","docAbstract":"Source- and age-related biomarker and isotopic data were measured for more than 1000 crude oil samples from wells and seeps collected above approximately 55??N latitude. A unique, multitiered chemometric (multivariate statistical) decision tree was created that allowed automated classification of 31 genetically distinct circumArctic oil families based on a training set of 622 oil samples. The method, which we call decision-tree chemometrics, uses principal components analysis and multiple tiers of K-nearest neighbor and SIMCA (soft independent modeling of class analogy) models to classify and assign confidence limits for newly acquired oil samples and source rock extracts. Geochemical data for each oil sample were also used to infer the age, lithology, organic matter input, depositional environment, and identity of its source rock. These results demonstrate the value of large petroleum databases where all samples were analyzed using the same procedures and instrumentation. Copyright ?? 2007. The American Association of Petroleum Geologists. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"American Association of Petroleum Geologists Bulletin","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1306/12290606097","issn":"01491423","usgsCitation":"Peters, K.E., Ramos, L., Zumberge, J., Valin, Z., Scotese, C., and Gautier, D.L., 2007, Circum-Arctic petroleum systems identified using decision-tree chemometrics: American Association of Petroleum Geologists Bulletin, v. 91, no. 6, p. 877-913, https://doi.org/10.1306/12290606097.","startPage":"877","endPage":"913","numberOfPages":"37","costCenters":[],"links":[{"id":212920,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1306/12290606097"},{"id":240485,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"91","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f605e4b0c8380cd4c55a","contributors":{"authors":[{"text":"Peters, K. E.","contributorId":17295,"corporation":false,"usgs":true,"family":"Peters","given":"K.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":424430,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ramos, L.S.","contributorId":47503,"corporation":false,"usgs":true,"family":"Ramos","given":"L.S.","email":"","affiliations":[],"preferred":false,"id":424432,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zumberge, J.E.","contributorId":37867,"corporation":false,"usgs":true,"family":"Zumberge","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":424431,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Valin, Z. C. 0000-0001-6199-6700","orcid":"https://orcid.org/0000-0001-6199-6700","contributorId":75165,"corporation":false,"usgs":true,"family":"Valin","given":"Z. C.","affiliations":[],"preferred":false,"id":424434,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Scotese, C.R.","contributorId":16138,"corporation":false,"usgs":true,"family":"Scotese","given":"C.R.","affiliations":[],"preferred":false,"id":424429,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Gautier, D. L.","contributorId":69996,"corporation":false,"usgs":true,"family":"Gautier","given":"D.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":424433,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70029811,"text":"70029811 - 2007 - Extracellular proteins limit the dispersal of biogenic nanoparticles","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029811","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Extracellular proteins limit the dispersal of biogenic nanoparticles","docAbstract":"High-spatial-resolution secondary ion microprobe spectrometry, synchrotron radiation-based Fourier-transform infrared spectroscopy, and polyacrylamide gel analysis demonstrated the intimate association of proteins with spheroidal aggregates of biogenic zinc sulfide nanocrystals, an example of extracellular biomineralization. Experiments involving synthetic zinc sulfide nanoparticles and representative amino acids indicated a driving role for cysteine in rapid nanoparticle aggregation. These findings suggest that microbially derived extracellular proteins can limit the dispersal of nanoparticulate metal-bearing phases, such as the mineral products of bioremediation, that may otherwise be transported away from their source by subsurface fluid flow.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1126/science.1141064","issn":"00368075","usgsCitation":"Moreau, J., Weber, P., Martin, M., Gilbert, B., Hutcheon, I., and Banfield, J., 2007, Extracellular proteins limit the dispersal of biogenic nanoparticles: Science, v. 316, no. 5831, p. 1600-1603, https://doi.org/10.1126/science.1141064.","startPage":"1600","endPage":"1603","numberOfPages":"4","costCenters":[],"links":[{"id":477116,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://www.osti.gov/biblio/926601","text":"External Repository"},{"id":212890,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1126/science.1141064"},{"id":240452,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"316","issue":"5831","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0e59e4b0c8380cd533e0","contributors":{"authors":[{"text":"Moreau, J.W.","contributorId":64457,"corporation":false,"usgs":true,"family":"Moreau","given":"J.W.","affiliations":[],"preferred":false,"id":424427,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Weber, P.K.","contributorId":53574,"corporation":false,"usgs":true,"family":"Weber","given":"P.K.","affiliations":[],"preferred":false,"id":424426,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Martin, M.C.","contributorId":51543,"corporation":false,"usgs":true,"family":"Martin","given":"M.C.","email":"","affiliations":[],"preferred":false,"id":424425,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Gilbert, B.","contributorId":27388,"corporation":false,"usgs":true,"family":"Gilbert","given":"B.","affiliations":[],"preferred":false,"id":424423,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hutcheon, I.D.","contributorId":90921,"corporation":false,"usgs":true,"family":"Hutcheon","given":"I.D.","email":"","affiliations":[],"preferred":false,"id":424428,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Banfield, J.F.","contributorId":48710,"corporation":false,"usgs":true,"family":"Banfield","given":"J.F.","email":"","affiliations":[],"preferred":false,"id":424424,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70029809,"text":"70029809 - 2007 - Interferogram formation in the presence of complex and large deformation","interactions":[],"lastModifiedDate":"2019-03-25T11:46:46","indexId":"70029809","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1807,"text":"Geophysical Research Letters","active":true,"publicationSubtype":{"id":10}},"title":"Interferogram formation in the presence of complex and large deformation","docAbstract":"<p>Sierra Negra volcano in Isabela island, Galápagos, erupted from October 22 to October 30 in 2005. During the 8 days of eruption, the center of Sierra Negra's caldera subsided about 5.4 meters. Three hours prior to the onset of the eruption, an earthquake (Mw 5.4) occurred, near the caldera. Because of the large and complex phase gradient due to the huge subsidence and the earthquake, it is difficult to form an interferogram inside the caldera that spans the eruption. The deformation is so large and spatially variable that the approximations used in existing InSAR software (ROI, ROI_PAC, DORIS, GAMMA) cannot properly coregister SAR image pairs spanning the eruption. We have developed here a two-step algorithm that can form intra-caldera interferograms from these data. The first step involves a \"rubber-sheeting\" SAR image coregistration. In the second step we use range offset estimates to mitigate the steep phase gradient. Using this new algorithm, we retrieve an interferogram with the best coverage to date inside the caldera of Sierra Negra.</p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2007GL029745","issn":"00948276","usgsCitation":"Yun, S., Zebker, H., Segall, P., Hooper, A., and Poland, M.P., 2007, Interferogram formation in the presence of complex and large deformation: Geophysical Research Letters, v. 34, no. 12, 6 p., https://doi.org/10.1029/2007GL029745.","productDescription":"6 p.","costCenters":[{"id":336,"text":"Hawaiian Volcano Observatory","active":false,"usgs":true},{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":240420,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Galápagos","otherGeospatial":"Isabela island, Sierra Negra volcano","volume":"34","issue":"12","noUsgsAuthors":false,"publicationDate":"2007-06-22","publicationStatus":"PW","scienceBaseUri":"505a3cfde4b0c8380cd631ec","contributors":{"authors":[{"text":"Yun, S.-H.","contributorId":11004,"corporation":false,"usgs":true,"family":"Yun","given":"S.-H.","email":"","affiliations":[],"preferred":false,"id":424415,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Zebker, H.","contributorId":25276,"corporation":false,"usgs":false,"family":"Zebker","given":"H.","affiliations":[],"preferred":false,"id":424417,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Segall, P.","contributorId":44231,"corporation":false,"usgs":false,"family":"Segall","given":"P.","affiliations":[],"preferred":false,"id":424418,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hooper, A.","contributorId":19781,"corporation":false,"usgs":true,"family":"Hooper","given":"A.","email":"","affiliations":[],"preferred":false,"id":424416,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Poland, Michael P. 0000-0001-5240-6123 mpoland@usgs.gov","orcid":"https://orcid.org/0000-0001-5240-6123","contributorId":146118,"corporation":false,"usgs":true,"family":"Poland","given":"Michael","email":"mpoland@usgs.gov","middleInitial":"P.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":424419,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70029808,"text":"70029808 - 2007 - State factor relationships of dissolved organic carbon and nitrogen losses from unpolluted temperate forest watersheds","interactions":[],"lastModifiedDate":"2017-11-15T10:07:16","indexId":"70029808","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2319,"text":"Journal of Geophysical Research G: Biogeosciences","active":true,"publicationSubtype":{"id":10}},"title":"State factor relationships of dissolved organic carbon and nitrogen losses from unpolluted temperate forest watersheds","docAbstract":"We sampled 100 unpolluted, old-growth forested watersheds, divided among 13 separate study areas over 5 years in temperate southern Chile and Argentina, to evaluate relationships among dominant soil-forming state factors and dissolved carbon and nitrogen concentrations in watershed streams. These watersheds provide a unique opportunity to examine broad-scale controls over carbon (C) and nitrogen (N) biogeochemistry in the absence of significant human disturbance from chronic N deposition and land use change. Variations in the ratio dissolved organic carbon (DOC) to nitrogen (DON) in watershed streams differed by underlying soil parent material, with average C:N = 29 for watersheds underlain by volcanic ash and basalt versus C:N = 73 for sedimentary and metamorphic parent materials, consistent with stronger adsorption of low C:N hydrophobic materials by amorphous clays commonly associated with volcanic ash and basalt weathering. Mean annual precipitation was related positively to variations in both DOC (range: 0.2-9.7 mg C/L) and DON (range: 0.008-0.135 mg N/L) across study areas, suggesting that variations in water volume and concentration may act synergistically to influence C and N losses across dry to wet gradients in these forest ecosystems. Dominance of vegetation by broadleaf versus coniferous trees had negligible effects on organic C and N concentrations in comparison to abiotic factors. We conclude that precipitation volume and soil parent material are important controls over chemical losses of dissolved organic C and N from unpolluted temperate forest watersheds. Our results raise the possibility that biotic imprints on watershed C and N losses may be less pronounced in naturally N-poor forests than in areas impacted by land use change and chronic N deposition. Copyright 2007 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research G: Biogeosciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2006JG000276","issn":"01480227","usgsCitation":"Perakis, S., and Hedin, L.O., 2007, State factor relationships of dissolved organic carbon and nitrogen losses from unpolluted temperate forest watersheds: Journal of Geophysical Research G: Biogeosciences, v. 112, no. 2, https://doi.org/10.1029/2006JG000276.","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":240419,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212862,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2006JG000276"}],"volume":"112","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-04-25","publicationStatus":"PW","scienceBaseUri":"505b96c8e4b08c986b31b6e6","contributors":{"authors":[{"text":"Perakis, S.S.","contributorId":82039,"corporation":false,"usgs":true,"family":"Perakis","given":"S.S.","affiliations":[],"preferred":false,"id":424414,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hedin, L. O.","contributorId":28574,"corporation":false,"usgs":false,"family":"Hedin","given":"L.","email":"","middleInitial":"O.","affiliations":[],"preferred":false,"id":424413,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029805,"text":"70029805 - 2007 - Distributed energy-balance modeling of snow-cover evolution and melt in rugged terrain: Tobacco Root Mountains, Montana, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029805","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Distributed energy-balance modeling of snow-cover evolution and melt in rugged terrain: Tobacco Root Mountains, Montana, USA","docAbstract":"A distributed energy-balance model was developed for simulating snowpack evolution and melt in rugged terrain. The model, which was applied to a 43-km2 watershed in the Tobacco Root Mountains, Montana, USA, used measured ambient data from nearby weather stations to drive energy-balance calculations and to constrain the model of Liston and Sturm [Liston, G.E., Sturm, M., 1998. A snow-transport model for complex terrain. Journal of Glaciology 44 (148), 498-516] for calculating the initial snowpack thickness. Simulated initial snow-water equivalent ranged between 1 cm and 385 cm w.e. (water equivalent) with high values concentrated on east-facing slopes below tall summits. An interpreted satellite image of the snowcover distribution on May 6, 1998, closely matched the simulated distribution with the greatest discrepancy occurring in the floor of the main trunk valley. Model simulations indicated that snowmelt commenced early in the melt season, but rapid meltout of snow cover did not occur until after the average energy balance of the entire watershed became positive about 45 days into the melt season. Meltout was fastest in the lower part of the watershed where warmer temperatures and tree cover enhanced the energy income of the underlying snow. An interpreted satellite image of the snowcover distribution on July 9, 1998 compared favorably with the simulated distribution, and melt curves for modeled canopy-covered cells mimicked the trends measured at nearby snow pillow stations. By the end of the simulation period (August 3), 28% of the watershed remained snow covered, most of which was concentrated in the highest parts of the watershed where initially thick accumulations had been shaded by surrounding summits. The results of this study provide further demonstration of the critical role that topography plays in the timing and magnitude of snowmelt from high mountain watersheds. ?? 2006 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jhydrol.2006.12.012","issn":"00221694","usgsCitation":"Letsinger, S., and Olyphant, G., 2007, Distributed energy-balance modeling of snow-cover evolution and melt in rugged terrain: Tobacco Root Mountains, Montana, USA: Journal of Hydrology, v. 336, no. 1-2, p. 48-60, https://doi.org/10.1016/j.jhydrol.2006.12.012.","startPage":"48","endPage":"60","numberOfPages":"13","costCenters":[],"links":[{"id":212805,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jhydrol.2006.12.012"},{"id":240349,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"336","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0254e4b0c8380cd4ffe8","contributors":{"authors":[{"text":"Letsinger, S.L.","contributorId":50731,"corporation":false,"usgs":true,"family":"Letsinger","given":"S.L.","affiliations":[],"preferred":false,"id":424403,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Olyphant, G.A.","contributorId":51023,"corporation":false,"usgs":true,"family":"Olyphant","given":"G.A.","email":"","affiliations":[],"preferred":false,"id":424404,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029803,"text":"70029803 - 2007 - Mechanical properties of sand, silt, and clay containing tetrahydrofuran hydrate","interactions":[],"lastModifiedDate":"2018-03-13T16:07:22","indexId":"70029803","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2314,"text":"Journal of Geophysical Research B: Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Mechanical properties of sand, silt, and clay containing tetrahydrofuran hydrate","docAbstract":"The mechanical behavior of hydrate-bearing sediments subjected to large strains has relevance for the stability of the seafloor and submarine slopes, drilling and coring operations, and the analysis of certain small-strain properties of these sediments (for example, seismic velocities). This study reports on the results of comprehensive axial compression triaxial tests conducted at up to 1 MPa confining pressure on sand, crushed silt, precipitated silt, and clay specimens with closely controlled concentrations of synthetic hydrate. The results show that the stress-strain behavior of hydrate-bearing sediments is a complex function of particle size, confining pressure, and hydrate concentration. The mechanical properties of hydrate-bearing sediments at low hydrate concentration (probably < 40% of pore space) appear to be determined by stress-dependent soil stiffness and strength. At high hydrate concentrations (>50% of pore space), the behavior becomes more independent of stress because the hydrates control both stiffness and strength and possibly the dilative tendency of sediments by effectively increasing interparticle coordination, cementing particles together, and filling the pore space. The cementation contribution to the shear strength of hydrate-bearing sediments decreases with increasing specific surface of soil minerals. The lower the effective confining stress, the greater the impact of hydrate formation on normalized strength.","language":"English","publisher":"Wiley","doi":"10.1029/2006JB004484","issn":"01480227","usgsCitation":"Yun, T., Santamarina, J., and Ruppel, C., 2007, Mechanical properties of sand, silt, and clay containing tetrahydrofuran hydrate: Journal of Geophysical Research B: Solid Earth, v. 112, no. 4, B04106; 13 p., https://doi.org/10.1029/2006JB004484.","productDescription":"B04106; 13 p.","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true},{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":477095,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006jb004484","text":"Publisher Index Page"},{"id":240312,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"112","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-04-17","publicationStatus":"PW","scienceBaseUri":"505a535be4b0c8380cd6ca0d","contributors":{"authors":[{"text":"Yun, T.S.","contributorId":26141,"corporation":false,"usgs":true,"family":"Yun","given":"T.S.","email":"","affiliations":[],"preferred":false,"id":424397,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Santamarina, J.C.","contributorId":50283,"corporation":false,"usgs":true,"family":"Santamarina","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":424396,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ruppel, C.","contributorId":82050,"corporation":false,"usgs":true,"family":"Ruppel","given":"C.","email":"","affiliations":[],"preferred":false,"id":424398,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029802,"text":"70029802 - 2007 - Accumulation of metals in fish from lead-zinc mining areas of southeastern Missouri, USA","interactions":[],"lastModifiedDate":"2017-03-15T14:46:22","indexId":"70029802","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1480,"text":"Ecotoxicology and Environmental Safety","active":true,"publicationSubtype":{"id":10}},"title":"Accumulation of metals in fish from lead-zinc mining areas of southeastern Missouri, USA","docAbstract":"The potential effects of proposed lead-zinc mining in an ecologically sensitive area were assessed by studying a nearby mining district that has been exploited for about 30 yr under contemporary environmental regulations and with modern technology. Blood and liver samples representing fish of three species (largescale stoneroller, Campostoma oligolepis, n=91; longear sunfish, Lepomis megalotis, n=105; and northern hog sucker, Hypentelium nigricans, n=20) were collected from 16 sites representing a range of conditions relative to lead-zinc mining and ore beneficiation in southeastern Missouri. Samples were analyzed for lead, zinc, and cadmium, and for a suite of biomarkers (reported in a companion paper). A subset of the hog sucker (n=9) representing three sites were also analyzed for nickel and cobalt. Blood and liver lead concentrations were highly correlated (r=0.84-0.85, P &lt; 0.01) in all three species and were significantly (ANOVA, P &lt; 0.01) greater at sites &lt; 10 km downstream of active lead-zinc mines and mills and in a historical lead-zinc mining area than at reference sites, including a site in the area proposed for new mining. Correlations between blood and liver cadmium concentrations were less evident than for lead but were nevertheless statistically significant (r=0.26-0.69, P  &lt; 0.01-0.07). Although blood and liver cadmium concentrations were highest in all three species at sites near mines, within-site variability was greater and mining-related trends were less evident than for lead. Blood and liver zinc concentrations were significantly correlated only in stoneroller (r=0.46, P &lt; 0.01) and mining-related trends were not evident. Concentrations of cobalt and nickel in blood and liver were significantly higher (ANOVA, P &lt; 0.01) at a site near an active mine than at a reference site and a site in the historical lead-zinc mining area. These findings confirm previous studies indicating that lead and other metals are released to streams from active lead-zinc mines and are available for uptake by aquatic organisms. ?? 2006 Elsevier Inc. All rights reserved.","language":"English","publisher":"Elsevier","doi":"10.1016/j.ecoenv.2006.11.002","issn":"01476513","usgsCitation":"Schmitt, C.J., Brumbaugh, W.G., and May, T.W., 2007, Accumulation of metals in fish from lead-zinc mining areas of southeastern Missouri, USA: Ecotoxicology and Environmental Safety, v. 67, no. 1, p. 14-30, https://doi.org/10.1016/j.ecoenv.2006.11.002.","productDescription":"17 p.","startPage":"14","endPage":"30","numberOfPages":"17","costCenters":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"links":[{"id":240311,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212773,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.ecoenv.2006.11.002"}],"volume":"67","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e683e4b0c8380cd4746a","contributors":{"authors":[{"text":"Schmitt, Christopher J. 0000-0001-6804-2360 cjschmitt@usgs.gov","orcid":"https://orcid.org/0000-0001-6804-2360","contributorId":491,"corporation":false,"usgs":true,"family":"Schmitt","given":"Christopher","email":"cjschmitt@usgs.gov","middleInitial":"J.","affiliations":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"preferred":true,"id":424393,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Brumbaugh, William G. 0000-0003-0081-375X bbrumbaugh@usgs.gov","orcid":"https://orcid.org/0000-0003-0081-375X","contributorId":493,"corporation":false,"usgs":true,"family":"Brumbaugh","given":"William","email":"bbrumbaugh@usgs.gov","middleInitial":"G.","affiliations":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"preferred":true,"id":424395,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"May, Thomas W. tmay@usgs.gov","contributorId":2598,"corporation":false,"usgs":true,"family":"May","given":"Thomas","email":"tmay@usgs.gov","middleInitial":"W.","affiliations":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"preferred":false,"id":424394,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029801,"text":"70029801 - 2007 - Coupling chemical weathering with soil production across soil-mantled landscapes","interactions":[],"lastModifiedDate":"2023-08-22T11:19:57.75735","indexId":"70029801","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1425,"text":"Earth Surface Processes and Landforms","active":true,"publicationSubtype":{"id":10}},"title":"Coupling chemical weathering with soil production across soil-mantled landscapes","docAbstract":"<div class=\"abstract-group  metis-abstract\"><div class=\"article-section__content en main\"><p>Soil-covered upland landscapes constitute a critical part of the habitable world. Our understanding of how they evolve as a function of different climatic, tectonic and geological regimes is important across a wide range of disciplines and depends, in part, on understanding the links between chemical and physical weathering processes. Extensive previous work has shown that soil production rates decrease with increasing soil column thickness, but chemical weathering rates were not measured. Here we examine a granitic, soil-mantled hillslope at Point Reyes, California, where soil production rates were determined using<span>&nbsp;</span><i>in situ</i><span>&nbsp;</span>produced cosmogenic nuclides (<sup>10</sup>Be and<span>&nbsp;</span><sup>26</sup>Al), and we quantify the extent as well as the rates of chemical weathering of the saprolite from beneath soil from across the landscape. We collected saprolite samples from the base of soil pits and analysed them for abrasion pH as well as for major and trace elements by X-ray fluorescence spectroscopy, and for clay mineralogy by X-ray diffraction spectroscopy. Our results show for the first time that chemical weathering rates decrease with increasing soil thickness and account for 13 to 51 per cent of total denudation. We also show that spatial variation in chemical weathering appears to be topographically controlled: weathering rate decreases with slope across the divergent ridge and increases with upslope contributing area in the convergent swale. Furthermore, to determine the best measure for the extent of saprolite weathering, we compared four different chemical weathering indices – the Vogt ratio, the chemical index of alteration (CIA), Parker's index, and the silicon–aluminium ratio – with saprolite pH. Measurements of the CIA were the most closely correlated with saprolite pH, showing that weathering intensity decreases linearly with an increase in saprolite pH from 4·7 to almost 7. Data presented here are among the first to couple directly rates of soil production and chemical weathering with how topography is likely to control weathering at a hillslope scale.&nbsp;</p></div></div>","language":"English","publisher":"Wiley","doi":"10.1002/esp.1443","issn":"01979337","usgsCitation":"Burke, B., Heimsath, A., and White, A.F., 2007, Coupling chemical weathering with soil production across soil-mantled landscapes: Earth Surface Processes and Landforms, v. 32, no. 6, p. 853-873, https://doi.org/10.1002/esp.1443.","productDescription":"21 p.","startPage":"853","endPage":"873","numberOfPages":"21","costCenters":[],"links":[{"id":240278,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"32","issue":"6","noUsgsAuthors":false,"publicationDate":"2006-10-17","publicationStatus":"PW","scienceBaseUri":"5059fc8ce4b0c8380cd4e2eb","contributors":{"authors":[{"text":"Burke, B.C.","contributorId":45521,"corporation":false,"usgs":true,"family":"Burke","given":"B.C.","email":"","affiliations":[],"preferred":false,"id":424391,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Heimsath, A.M.","contributorId":52781,"corporation":false,"usgs":true,"family":"Heimsath","given":"A.M.","affiliations":[],"preferred":false,"id":424392,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"White, A. F.","contributorId":36546,"corporation":false,"usgs":true,"family":"White","given":"A.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":424390,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029800,"text":"70029800 - 2007 - Issues, benefits, and problems associated with fishing tournaments in inland waters of the United States: A survey of fishery agency administrators","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029800","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1657,"text":"Fisheries","onlineIssn":"1548-8446","printIssn":"0363-2415","active":true,"publicationSubtype":{"id":10}},"title":"Issues, benefits, and problems associated with fishing tournaments in inland waters of the United States: A survey of fishery agency administrators","docAbstract":"A web-based survey was administered to state fisheries agency administrators in 2005 to assess and prioritize the impacts of tournament fishing on management of inland fishery resources. Surveys were completed by fishery administrators of 48 state agencies and the District of Columbia. Respondents rated tournaments as neither strongly benefiting nor adversely affecting fishery management. Benefits of tournaments to fishery management grouped into four factors (in order of decreasing impact) characterized as enhancing fishery management agency effectiveness, stimulating interest in fishing and fishery resources, measuring economic value, and collecting biological information. Adverse impacts grouped into six factors (in order of decreasing impact), characterized as resource crowding, user-group conflicts, costs of tournaments to fishery agencies, non-traditional uses of fisheries resources, fish introductions, and adverse affects on fish populations. Tournament issues and impacts generally did not differ regionally and suggested the effects of tournaments do not vary among different fisheries. Comparison with previous surveys indicates that the prevalence of some benefits and problems have changed since 1989. Social issues remained paramount problems, but biological impacts were considered a lesser problem. Agencies recognized that tournaments can benefit fisheries management efforts and angler recruitment. Future management of tournaments should consider a management team approach.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Fisheries","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"03632415","usgsCitation":"Schramm, H., and Hunt, K., 2007, Issues, benefits, and problems associated with fishing tournaments in inland waters of the United States: A survey of fishery agency administrators: Fisheries, v. 32, no. 5, p. 234-243.","startPage":"234","endPage":"243","numberOfPages":"10","costCenters":[],"links":[{"id":240277,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"32","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3fc8e4b0c8380cd64800","contributors":{"authors":[{"text":"Schramm, H.L. Jr.","contributorId":103823,"corporation":false,"usgs":true,"family":"Schramm","given":"H.L.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":424389,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hunt, K.M.","contributorId":34724,"corporation":false,"usgs":true,"family":"Hunt","given":"K.M.","email":"","affiliations":[],"preferred":false,"id":424388,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029797,"text":"70029797 - 2007 - The diversity-biomass-productivity relationships in grassland management and restoration","interactions":[],"lastModifiedDate":"2017-11-16T09:51:08","indexId":"70029797","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":970,"text":"Basic and Applied Ecology","active":true,"publicationSubtype":{"id":10}},"title":"The diversity-biomass-productivity relationships in grassland management and restoration","docAbstract":"Diversity, biomass, and productivity, the three key community/ecosystem variables, are interrelated and pose reciprocal influences on each other. The relationships among the three variables have been a central focus in ecology and formed two schools of fundamentally different nature with two related applications: (1) management - how biomass manipulation (e.g., grazing, burning) affects diversity and productivity, and (2) restoration - how diversity manipulation (e.g., seeding, planting) affects biomass and productivity. In the past, the two apparently related aspects have been studied intensively but separately in basic research and the reciprocal effects of the three variables and applied aspects have not been jointly addressed. In most cases, optimal management often involves regulating biomass so that high diversity and productivity or other preferred habitat characteristics can be achieved and maintained, while restoration usually involves planting/seeding a certain number and/or combination of native species so that the native structure and function of the habitat can be restored and degraded ecosystems can recover faster. This article attempts to unify these two schools and discusses the significance and implications of the diversity-biomass-productivity relationships in practice, with particular emphasis on grassland ecosystems. ?? 2006 Gesellschaft fu??r O??kologie.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Basic and Applied Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.baae.2006.02.005","issn":"14391791","usgsCitation":"Guo, Q., 2007, The diversity-biomass-productivity relationships in grassland management and restoration: Basic and Applied Ecology, v. 8, no. 3, p. 199-208, https://doi.org/10.1016/j.baae.2006.02.005.","productDescription":"10 p.","startPage":"199","endPage":"208","costCenters":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":240207,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212682,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.baae.2006.02.005"}],"volume":"8","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505baae3e4b08c986b322a9d","contributors":{"authors":[{"text":"Guo, Q.","contributorId":67039,"corporation":false,"usgs":true,"family":"Guo","given":"Q.","email":"","affiliations":[],"preferred":false,"id":424380,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70029796,"text":"70029796 - 2007 - Arc-parallel extension and fluid flow in an ancient accretionary wedge: The San Juan Islands, Washington","interactions":[],"lastModifiedDate":"2017-04-12T16:02:18","indexId":"70029796","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Arc-parallel extension and fluid flow in an ancient accretionary wedge: The San Juan Islands, Washington","docAbstract":"Structural analysis of the Lopez Structural Complex, a major Late Cretaceous terrane-bounding fault zone in the San Juan thrust system, reveals a sequence of events that provides insight into accretionary wedge mechanics and regional tectonics. After formation of regional ductile flattening and shear-related fabrics, the area was crosscut by brittle structures including: (1) southwest-vergent thrusts, (2) extension veins and normal faults related to northwest-southeast extension, and (3) conjugate strike-slip structures that record northwest-southeast extension and northeast-southwest shortening. Aragonite-bearing veins are associated with thrust and normal faults, but only rarely with strike-slip faults. High-pressure, low-temperature (HP-LT) minerals constrain the conditions for brittle deformation to ???20 km and <250 ??C. The presence of similar structures elsewhere indicates that the brittle structural sequence is typical of the San Juan nappes. Sustained HP-LT conditions are possible only if structures formed in an accretionary prism during active subduction, which suggests that these brittle structures record internal wedge deformation at depth and early during uplift of the San Juan nappes. The structures are consistent with orogen-normal shortening and vertical thickening followed by vertical thinning and along-strike extension. The kinematic evolution may be related initially to changes in wedge strength, followed by response to overthickening of the wedge in an unbuttressed, obliquely convergent setting. The change in vein mineralogy indicates that exhumation occurred prior to the strike-slip event. The pressure and temperature conditions and spatial and temporal extent of small faults associated with fluid flow suggest a link between these structures and the silent earthquake process. ?? 2007 Geological Society of America.","language":"English","publisher":"Geological Society of America","doi":"10.1130/B25985.1","issn":"00167606","usgsCitation":"Schermer, E.R., Gillaspy, J., and Lamb, R., 2007, Arc-parallel extension and fluid flow in an ancient accretionary wedge: The San Juan Islands, Washington: Geological Society of America Bulletin, v. 119, no. 5-6, p. 753-767, https://doi.org/10.1130/B25985.1.","productDescription":"15 p.","startPage":"753","endPage":"767","numberOfPages":"15","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":240206,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212681,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/B25985.1"}],"volume":"119","issue":"5-6","noUsgsAuthors":false,"publicationDate":"2007-05-08","publicationStatus":"PW","scienceBaseUri":"5059ed2ce4b0c8380cd49687","contributors":{"authors":[{"text":"Schermer, Elizabeth R.","contributorId":184060,"corporation":false,"usgs":false,"family":"Schermer","given":"Elizabeth","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":424379,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gillaspy, J.R.","contributorId":13441,"corporation":false,"usgs":true,"family":"Gillaspy","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":424377,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lamb, R.","contributorId":72206,"corporation":false,"usgs":true,"family":"Lamb","given":"R.","email":"","affiliations":[],"preferred":false,"id":424378,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029795,"text":"70029795 - 2007 - Altered stream-flow regimes and invasive plant species: The Tamarix case","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029795","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1839,"text":"Global Ecology and Biogeography","active":true,"publicationSubtype":{"id":10}},"title":"Altered stream-flow regimes and invasive plant species: The Tamarix case","docAbstract":"Aim: To test the hypothesis that anthropogenic alteration of stream-flow regimes is a key driver of compositional shifts from native to introduced riparian plant species. Location: The arid south-western United States; 24 river reaches in the Gila and Lower Colorado drainage basins of Arizona. Methods: We compared the abundance of three dominant woody riparian taxa (native Populus fremontii and Salix gooddingii, and introduced Tamarix) between river reaches that varied in stream-flow permanence (perennial vs. intermittent), presence or absence of an upstream flow-regulating dam, and presence or absence of municipal effluent as a stream water source. Results: Populus and Salix were the dominant pioneer trees along the reaches with perennial flow and a natural flood regime. In contrast, Tamarix had high abundance (patch area and basal area) along reaches with intermittent stream flows (caused by natural and cultural factors), as well as those with dam-regulated flows. Main conclusions: Stream-flow regimes are strong determinants of riparian vegetation structure, and hydrological alterations can drive dominance shifts to introduced species that have an adaptive suite of traits. Deep alluvial groundwater on intermittent rivers favours the deep-rooted, stress-adapted Tamarix over the shallower-rooted and more competitive Populus and Salix. On flow-regulated rivers, shifts in flood timing favour the reproductively opportunistic Tamarix over Populus and Salix, both of which have narrow germination windows. The prevailing hydrological conditions thus favour a new dominant pioneer species in the riparian corridors of the American Southwest. These results reaffirm the importance of reinstating stream-flow regimes (inclusive of groundwater flows) for re-establishing the native pioneer trees as the dominant forest type. ?? 2007 The Authors Journal compilation ?? 2007 Blackwell Publishing Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Global Ecology and Biogeography","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1466-8238.2007.00297.x","issn":"1466822X","usgsCitation":"Stromberg, J., Lite, S., Marler, R., Paradzick, C., Shafroth, P., Shorrock, D., White, J.M., and White, M., 2007, Altered stream-flow regimes and invasive plant species: The Tamarix case: Global Ecology and Biogeography, v. 16, no. 3, p. 381-393, https://doi.org/10.1111/j.1466-8238.2007.00297.x.","startPage":"381","endPage":"393","numberOfPages":"13","costCenters":[],"links":[{"id":212653,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1466-8238.2007.00297.x"},{"id":240173,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-01-18","publicationStatus":"PW","scienceBaseUri":"5059e97be4b0c8380cd482ec","contributors":{"authors":[{"text":"Stromberg, J.C.","contributorId":81455,"corporation":false,"usgs":true,"family":"Stromberg","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":424376,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lite, S.J.","contributorId":35535,"corporation":false,"usgs":true,"family":"Lite","given":"S.J.","email":"","affiliations":[],"preferred":false,"id":424372,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Marler, R.","contributorId":13440,"corporation":false,"usgs":true,"family":"Marler","given":"R.","email":"","affiliations":[],"preferred":false,"id":424369,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Paradzick, C.","contributorId":17426,"corporation":false,"usgs":true,"family":"Paradzick","given":"C.","affiliations":[],"preferred":false,"id":424371,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Shafroth, P.B.","contributorId":65041,"corporation":false,"usgs":true,"family":"Shafroth","given":"P.B.","email":"","affiliations":[],"preferred":false,"id":424375,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Shorrock, D.","contributorId":58465,"corporation":false,"usgs":true,"family":"Shorrock","given":"D.","email":"","affiliations":[],"preferred":false,"id":424374,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"White, J. M.","contributorId":40268,"corporation":false,"usgs":true,"family":"White","given":"J.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":424373,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"White, M.S.","contributorId":14199,"corporation":false,"usgs":true,"family":"White","given":"M.S.","email":"","affiliations":[],"preferred":false,"id":424370,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70029794,"text":"70029794 - 2007 - Ecological gradients within a Pennsylvanian mire forest","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029794","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Ecological gradients within a Pennsylvanian mire forest","docAbstract":"Pennsylvanian coals represent remains of the earliest peat-forming rain forests, but there is no current consensus on forest ecology. Localized studies of fossil forests suggest intermixture of taxa (heterogeneity), while, in contrast, coal ball and palynological analyses imply the existence of pronounced ecological gradients. Here, we report the discovery of a spectacular fossil forest preserved over ???1000 ha on top of the Pennsylvanian (Desmoinesian) Herrin (No. 6) Coal of Illinois, United States. The forest was abruptly drowned when fault movement dropped a segment of coastal mire below sea level. In the largest study of its kind to date, forest composition is statistically analyzed within a well-constrained paleogeographic context. Findings resolve apparent conflicts in models of Pennsylvanian mire ecology by confirming the existence of forest heterogeneity at the local scale, while additionally demonstrating the emergence of ecological gradients at landscape scale. ?? 2007 The Geological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/G23472A.1","issn":"00917613","usgsCitation":"DiMichele, W.A., Falcon-Lang, H.J., Nelson, W., Elrick, S., and Ames, P., 2007, Ecological gradients within a Pennsylvanian mire forest: Geology, v. 35, no. 5, p. 415-418, https://doi.org/10.1130/G23472A.1.","startPage":"415","endPage":"418","numberOfPages":"4","costCenters":[],"links":[{"id":212652,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/G23472A.1"},{"id":240172,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"35","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0553e4b0c8380cd50d61","contributors":{"authors":[{"text":"DiMichele, William A.","contributorId":97631,"corporation":false,"usgs":true,"family":"DiMichele","given":"William","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":424368,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Falcon-Lang, H. J.","contributorId":41220,"corporation":false,"usgs":true,"family":"Falcon-Lang","given":"H.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":424367,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nelson, W.J.","contributorId":17762,"corporation":false,"usgs":true,"family":"Nelson","given":"W.J.","email":"","affiliations":[],"preferred":false,"id":424365,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Elrick, S.D.","contributorId":38364,"corporation":false,"usgs":true,"family":"Elrick","given":"S.D.","email":"","affiliations":[],"preferred":false,"id":424366,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ames, P.R.","contributorId":9823,"corporation":false,"usgs":true,"family":"Ames","given":"P.R.","email":"","affiliations":[],"preferred":false,"id":424364,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
]}