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Between 18 March and 27 October 2002, 220 air samples were collected on 209 of 224 calendar days, on top of a coastal atmospheric research tower in Erdemli, Turkey. The volume of air filtered for each sample was 340 liters. Two hundred fifty-seven bacterial and 2598 fungal colony forming units (CFU) were enumerated from the samples using a low-nutrient agar. Ground-based dust measurements demonstrated that the region is routinely impacted by dust generated regionally and from North Africa and that the highest combined percent recovery of total CFU and African dust deposition occurred in the month of April (93.4% of CFU recovery and 91.1% of dust deposition occurred during African dust days versus no African dust present, for that month). A statistically significant correlation was observed (peak regional African dust months of March, April and May; rs=0.576, P=0.000) between an increase in the prevalence of microorganisms recovered from atmospheric samples on dust days (regional and African as determined by ground-based dust measurements), versus that observed on non-dust days. Given the prevalence of atmospherically suspended desert dust and microorganisms observed in this study, and that culture-based studies typically only recover a small fraction (<1.0%) of the actual microbial population in any given environment, dust-borne microorganisms and other associated constituents (organic detritus, toxins, etc.) may play a significant role in the regional human and ecosystem health.

","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Atmospheric Environment","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.atmosenv.2007.01.023","issn":"13522310","usgsCitation":"Griffin, D.W., Kubilay, N., Kocak, M., Gray, M.A., Borden, T.C., and Shinn, E., 2007, Airborne desert dust and aeromicrobiology over the Turkish Mediterranean coastline: Atmospheric Environment, v. 41, no. 19, p. 4050-4062, https://doi.org/10.1016/j.atmosenv.2007.01.023.","productDescription":"13 p.","startPage":"4050","endPage":"4062","numberOfPages":"13","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":487595,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://hdl.handle.net/11511/31009","text":"External Repository"},{"id":212824,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.atmosenv.2007.01.023"},{"id":240371,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Turkey","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -20.0,20.0 ], [ -20.0,60.0 ], [ 60.0,60.0 ], [ 60.0,20.0 ], [ -20.0,20.0 ] ] ] } } ] }","volume":"41","issue":"19","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e91de4b0c8380cd480dc","contributors":{"authors":[{"text":"Griffin, Dale W. 0000-0003-1719-5812 dgriffin@usgs.gov","orcid":"https://orcid.org/0000-0003-1719-5812","contributorId":2178,"corporation":false,"usgs":true,"family":"Griffin","given":"Dale","email":"dgriffin@usgs.gov","middleInitial":"W.","affiliations":[{"id":574,"text":"St. Petersburg Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":425881,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kubilay, Nilgun","contributorId":105533,"corporation":false,"usgs":true,"family":"Kubilay","given":"Nilgun","email":"","affiliations":[],"preferred":false,"id":425886,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kocak, Mustafa","contributorId":40019,"corporation":false,"usgs":true,"family":"Kocak","given":"Mustafa","email":"","affiliations":[],"preferred":false,"id":425884,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Gray, Mike A.","contributorId":88954,"corporation":false,"usgs":true,"family":"Gray","given":"Mike","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":425885,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Borden, Timothy C.","contributorId":16224,"corporation":false,"usgs":true,"family":"Borden","given":"Timothy","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":425883,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Shinn, Eugene A.","contributorId":6883,"corporation":false,"usgs":true,"family":"Shinn","given":"Eugene A.","affiliations":[],"preferred":false,"id":425882,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70030873,"text":"70030873 - 2007 - Selection for rapid embryo development correlates with embryo exposure to maternal androgens among passerine birds","interactions":[],"lastModifiedDate":"2012-03-12T17:21:18","indexId":"70030873","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":740,"text":"American Naturalist","active":true,"publicationSubtype":{"id":10}},"title":"Selection for rapid embryo development correlates with embryo exposure to maternal androgens among passerine birds","docAbstract":"Greater offspring predation favors evolution of faster development among species. We hypothesized that greater offspring predation exerts selection on mothers to increase levels of anabolic androgens in egg yolks to achieve faster development. Here, we tested whether (1) concentrations of yolk androgens in passerine species were associated with offspring predation and (2) embryo and nestling development rates were associated with yolk androgen concentrations. We examined three androgens that increase in potency along the synthesis pathway: androstenedione (A4) to testosterone (T) to 5??- dihydrotestosterone (5??-DHT). Concentrations of none of these steroids were related to clutch size; only A4 was allometrically related to egg volume. Species that experience greater predation showed higher yolk concentrations of T and 5??-DHT. Higher concentrations of T and particularly 5??-DHT were strongly correlated with faster development during the embryo period and less so during the nestling period. Development rates were most strongly correlated with 5??-DHT, suggesting that potency increases along the androgen synthesis pathway and that effects are mediated by the androgen receptor pathway. These results are consistent with the hypothesis that selection for faster development by time-dependent offspring mortality may be achieved epigenetically by varying embryo exposure to maternal anabolic steroids. ?? 2007 by The University of Chicago. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"American Naturalist","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1086/519397","issn":"00030147","usgsCitation":"Schwabl, H., Palacios, M., and Martin, T.E., 2007, Selection for rapid embryo development correlates with embryo exposure to maternal androgens among passerine birds: American Naturalist, v. 170, no. 2, p. 196-206, https://doi.org/10.1086/519397.","startPage":"196","endPage":"206","numberOfPages":"11","costCenters":[],"links":[{"id":211529,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1086/519397"},{"id":238830,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"170","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8ccbe4b08c986b318126","contributors":{"authors":[{"text":"Schwabl, H.","contributorId":45811,"corporation":false,"usgs":true,"family":"Schwabl","given":"H.","affiliations":[],"preferred":false,"id":429036,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Palacios, M.G.","contributorId":95266,"corporation":false,"usgs":true,"family":"Palacios","given":"M.G.","email":"","affiliations":[],"preferred":false,"id":429037,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Martin, T. E.","contributorId":10911,"corporation":false,"usgs":true,"family":"Martin","given":"T.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":429035,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70030872,"text":"70030872 - 2007 - Do soil characteristics or microhabitat determine field emergence and success of Bromus tectorum?","interactions":[],"lastModifiedDate":"2012-03-12T17:21:19","indexId":"70030872","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2183,"text":"Journal of Arid Environments","active":true,"publicationSubtype":{"id":10}},"title":"Do soil characteristics or microhabitat determine field emergence and success of Bromus tectorum?","docAbstract":"In southeastern Utah, Bromus tectorum occurs where Hilaria jamesii is dominant and rarely where Stipa hymenoides/S. comata dominate. To determine whether this distribution is due to soil characteristics or microhabitat, we transplanted H. jamesii soil to a Stipa site and vice versa during a severe drought (2001) and a wetter year (2002). Additionally, we planted B. tectorum under H. jamesii and Stipa canopies, with or without H. jamesii litter, and with or without herbivory. Bromus tectorum emergence and biomass in reciprocal transplants were similar at both sites; there were no site differences for all microhabitat treatments. Being under a plant canopy increased emergence in 2001 and decreased survival during 2002. Herbivory decreased emergence in 2001 and decreased survival during 2002. Litter increased emergence only under the canopy in 2001 but did not affect survival in 2002. Survival in 2001 was so low that biomass was unattainable; no microhabitat treatments affected biomass in 2002. We found that soil characteristics and microhabitat affected B. tectorum similarly in H. jamesii and Stipa patches, suggesting that these factors do not explain the association between B. tectorum and H. jamesii. However, these relationships may change during wet years when B. tectorum invasions most often occur. ?? 2006 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Arid Environments","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jaridenv.2006.12.013","issn":"01401963","usgsCitation":"Newingham, B., Vidiella, P., and Belnap, J., 2007, Do soil characteristics or microhabitat determine field emergence and success of Bromus tectorum?: Journal of Arid Environments, v. 70, no. 3, p. 389-402, https://doi.org/10.1016/j.jaridenv.2006.12.013.","startPage":"389","endPage":"402","numberOfPages":"14","costCenters":[],"links":[{"id":211503,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jaridenv.2006.12.013"},{"id":238800,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"70","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0366e4b0c8380cd5048f","contributors":{"authors":[{"text":"Newingham, B.A.","contributorId":19775,"corporation":false,"usgs":true,"family":"Newingham","given":"B.A.","affiliations":[],"preferred":false,"id":429032,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Vidiella, P.","contributorId":103866,"corporation":false,"usgs":true,"family":"Vidiella","given":"P.","email":"","affiliations":[],"preferred":false,"id":429034,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Belnap, J. 0000-0001-7471-2279","orcid":"https://orcid.org/0000-0001-7471-2279","contributorId":23872,"corporation":false,"usgs":true,"family":"Belnap","given":"J.","affiliations":[],"preferred":false,"id":429033,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70030871,"text":"70030871 - 2007 - Characterization of microsatellite loci isolated in Mountain Plover (Charadrius montanus)","interactions":[],"lastModifiedDate":"2012-03-12T17:21:19","indexId":"70030871","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2775,"text":"Molecular Ecology Notes","onlineIssn":"1471-8286","printIssn":"1471-8278","active":true,"publicationSubtype":{"id":10}},"title":"Characterization of microsatellite loci isolated in Mountain Plover (Charadrius montanus)","docAbstract":"Primers for 15 microsatellite loci were developed for Mountain Plover, a species whose distribution and abundance have been reduced drastically in the past 30 years. In a screen of 126 individuals collected from four breeding locales across the species' range, levels of polymorphism ranged from two to 13 alleles per locus. No two loci were found to be linked, although one locus revealed significant departures from Hardy-Weinberg equilibrium. These microsatellite loci can be used in population genetic studies, ultimately aiding in management efforts for Mountain Plover. Additionally, these markers can potentially be used in studies investigating the mating system of Mountain Plover. ?? 2007 Blackwell Publishing Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Molecular Ecology Notes","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1471-8286.2007.01709.x","issn":"14718278","usgsCitation":"John, J.S., Kysela, R., and Oyler-McCance, S., 2007, Characterization of microsatellite loci isolated in Mountain Plover (Charadrius montanus): Molecular Ecology Notes, v. 7, no. 5, p. 802-804, https://doi.org/10.1111/j.1471-8286.2007.01709.x.","startPage":"802","endPage":"804","numberOfPages":"3","costCenters":[],"links":[{"id":211502,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1471-8286.2007.01709.x"},{"id":238799,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"7","issue":"5","noUsgsAuthors":false,"publicationDate":"2007-02-19","publicationStatus":"PW","scienceBaseUri":"5059f4d1e4b0c8380cd4bf3b","contributors":{"authors":[{"text":"John, J. St","contributorId":48376,"corporation":false,"usgs":true,"family":"John","given":"J.","email":"","middleInitial":"St","affiliations":[],"preferred":false,"id":429029,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kysela, R.F.","contributorId":95680,"corporation":false,"usgs":true,"family":"Kysela","given":"R.F.","email":"","affiliations":[],"preferred":false,"id":429031,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Oyler-McCance, S.J.","contributorId":75877,"corporation":false,"usgs":true,"family":"Oyler-McCance","given":"S.J.","email":"","affiliations":[],"preferred":false,"id":429030,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70030861,"text":"70030861 - 2007 - Environmental geochemistry at Red Mountain, an unmined volcanogenic massive sulphide deposit in the Bonnifield district, Alaska Range, east-central Alaska","interactions":[],"lastModifiedDate":"2019-12-19T09:53:27","indexId":"70030861","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1758,"text":"Geochemistry: Exploration, Environment, Analysis","active":true,"publicationSubtype":{"id":10}},"title":"Environmental geochemistry at Red Mountain, an unmined volcanogenic massive sulphide deposit in the Bonnifield district, Alaska Range, east-central Alaska","docAbstract":"

The unmined, pyrite-rich Red Mountain (Dry Creek) deposit displays a remarkable environmental footprint of natural acid generation, high metal and exceedingly high rare earth element (REE) concentrations in surface waters. The volcanogenic massive sulphide deposit exhibits well-constrained examples of acid-generating, metal-leaching, metal-precipitation and self-mitigation (via co-precipitation, dilution and neutralization) processes that occur in an undisturbed natural setting, a rare occurrence in North America. Oxidative dissolution of pyrite and associated secondary reactions under near-surface oxidizing conditions are the primary causes for the acid generation and metal leaching. The deposit is hosted in Devonian to Mississippian felsic metavolcanic rocks of the Mystic Creek Member of the Totatlanika Schist.

Water samples with the lowest pH (many below 3.5), highest specific conductance (commonly >2500 μS/cm) and highest major- and trace-element concentrations are from springs and streams within the quartz–sericite–pyrite alteration zone. Aluminum, Cd, Co, Cu, Fe, Mn, Ni, Pb, Y, Zn and, particularly, the REEs are found in high concentrations, ranging across four orders of magnitude. Waters collected upstream from the alteration zone have near-neutral pH, lower specific conductance (370 to 830 μS/cm), lower metal concentrations and measurable alkalinities. Water samples collected downstream of the alteration zone have pH and metal concentrations intermediate between these two extremes. Stream sediments are anomalous in Zn, Pb, S, Fe, Cu, As, Co, Sb and Cd relative to local and regional background abundances. Red Mountain Creek and its tributaries do not, and probably never have, supported significant aquatic life.

","language":"English","publisher":"Geological Society of London","doi":"10.1144/1467-7873/07-136","issn":"14677873","usgsCitation":"Eppinger, R.G., Briggs, P., Dusel-Bacon, C., Giles, S.A., Gough, L.P., Hammarstrom, J.M., and Hubbard, B.E., 2007, Environmental geochemistry at Red Mountain, an unmined volcanogenic massive sulphide deposit in the Bonnifield district, Alaska Range, east-central Alaska: Geochemistry: Exploration, Environment, Analysis, v. 7, no. 3, p. 207-223, https://doi.org/10.1144/1467-7873/07-136.","productDescription":"17 p.","startPage":"207","endPage":"223","numberOfPages":"17","costCenters":[{"id":245,"text":"Eastern Mineral and Environmental Resources Science Center","active":true,"usgs":true},{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true},{"id":387,"text":"Mineral Resources Program","active":true,"usgs":true}],"links":[{"id":238667,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Red Mountain","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -151.875,\n 63.39152174400882\n ],\n [\n -146.1181640625,\n 63.39152174400882\n ],\n [\n -146.1181640625,\n 65.45826097864811\n ],\n [\n -151.875,\n 65.45826097864811\n ],\n [\n -151.875,\n 63.39152174400882\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"7","issue":"3","noUsgsAuthors":false,"publicationDate":"2022-06-06","publicationStatus":"PW","scienceBaseUri":"505a09c5e4b0c8380cd5205f","contributors":{"authors":[{"text":"Eppinger, Robert G. eppinger@usgs.gov","contributorId":849,"corporation":false,"usgs":true,"family":"Eppinger","given":"Robert","email":"eppinger@usgs.gov","middleInitial":"G.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":777756,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Briggs, Paul H.","contributorId":107691,"corporation":false,"usgs":true,"family":"Briggs","given":"Paul H.","affiliations":[],"preferred":false,"id":428987,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Dusel-Bacon, Cynthia 0000-0001-8481-739X cdusel@usgs.gov","orcid":"https://orcid.org/0000-0001-8481-739X","contributorId":2797,"corporation":false,"usgs":true,"family":"Dusel-Bacon","given":"Cynthia","email":"cdusel@usgs.gov","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":777757,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Giles, Stuart A. 0000-0002-8696-5078 sgiles@usgs.gov","orcid":"https://orcid.org/0000-0002-8696-5078","contributorId":1233,"corporation":false,"usgs":true,"family":"Giles","given":"Stuart","email":"sgiles@usgs.gov","middleInitial":"A.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true},{"id":387,"text":"Mineral Resources Program","active":true,"usgs":true}],"preferred":true,"id":777758,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Gough, Larry P. lgough@usgs.gov","contributorId":1230,"corporation":false,"usgs":true,"family":"Gough","given":"Larry","email":"lgough@usgs.gov","middleInitial":"P.","affiliations":[],"preferred":true,"id":777759,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Hammarstrom, Jane M. 0000-0003-2742-3460 jhammars@usgs.gov","orcid":"https://orcid.org/0000-0003-2742-3460","contributorId":1226,"corporation":false,"usgs":true,"family":"Hammarstrom","given":"Jane","email":"jhammars@usgs.gov","middleInitial":"M.","affiliations":[{"id":387,"text":"Mineral Resources Program","active":true,"usgs":true},{"id":245,"text":"Eastern Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":777760,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Hubbard, Bernard E. 0000-0002-9315-2032 bhubbard@usgs.gov","orcid":"https://orcid.org/0000-0002-9315-2032","contributorId":2342,"corporation":false,"usgs":true,"family":"Hubbard","given":"Bernard","email":"bhubbard@usgs.gov","middleInitial":"E.","affiliations":[{"id":245,"text":"Eastern Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":777761,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70030860,"text":"70030860 - 2007 - Investigation of reductive dechlorination supported by natural organic carbon","interactions":[],"lastModifiedDate":"2018-10-16T11:28:56","indexId":"70030860","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1864,"text":"Ground Water Monitoring and Remediation","active":true,"publicationSubtype":{"id":10}},"title":"Investigation of reductive dechlorination supported by natural organic carbon","docAbstract":"

Because remediation timeframes using monitored natural attenuation may span decades or even centuries at chlorinated solvent sites, new approaches are needed to assess the long-term sustainability of reductive dechlorination in ground water systems. In this study, extraction procedures were used to investigate the mass of indigenous organic carbon in aquifer sediment, and experiments were conducted to determine if the extracted carbon could support reductive dechlorination of chloroethenes. Aquifer sediment cores were collected from a site without an anthropogenic source of organic carbon where organic carbon varied from 0.02% to 0.12%. Single extraction results showed that 1% to 28% of sediment-associated organic carbon and 2% to 36% of the soft carbon were removed depending on nature and concentration of the extracting solution (Nanopure water; 0.1%, 0.5%, and 1.0% sodium pyrophosphate; and 0.5 N sodium hydroxide). Soft carbon is defined as organic carbon oxidized with potassium persulfate and is assumed to serve as a source of biodegradable carbon within the aquifer. Biodegradability studies demonstrated that 20% to 40% of extracted organic carbon was biodegraded aerobically and anaerobically by soil microorganisms in relatively brief tests (45 d). A five-step extraction procedure consisting of 0.1% pyrophosphate and base solutions was investigated to quantify bioavailable organic carbon. Using the extracted carbon as the sole electron donor source, tetrachloroethene was transformed to cis-1,2- dichloroethene and vinyl chloride in anaerobic enrichment culture experiments. Hydrogen gas was produced at levels necessary to sustain reductive dechlorination (>1 nM).

","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water Monitoring and Remediation","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1745-6592.2007.00173.x","issn":"10693629","usgsCitation":"Rectanus, H.V., Widdowson, M.A., Chapelle, F.H., Kelly, C., and Novak, J.T., 2007, Investigation of reductive dechlorination supported by natural organic carbon: Ground Water Monitoring and Remediation, v. 27, no. 4, p. 53-62, https://doi.org/10.1111/j.1745-6592.2007.00173.x.","productDescription":"10 p.","startPage":"53","endPage":"62","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":238634,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211358,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6592.2007.00173.x"}],"volume":"27","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-11-20","publicationStatus":"PW","scienceBaseUri":"505a3e94e4b0c8380cd63eb3","contributors":{"authors":[{"text":"Rectanus, Heather V.","contributorId":46351,"corporation":false,"usgs":true,"family":"Rectanus","given":"Heather","email":"","middleInitial":"V.","affiliations":[],"preferred":false,"id":428976,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Widdowson, Mark A.","contributorId":90379,"corporation":false,"usgs":true,"family":"Widdowson","given":"Mark","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":428977,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"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":428980,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kelly, C.A.","contributorId":72564,"corporation":false,"usgs":true,"family":"Kelly","given":"C.A.","email":"","affiliations":[],"preferred":false,"id":428978,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Novak, John T.","contributorId":41753,"corporation":false,"usgs":true,"family":"Novak","given":"John","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":428979,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70030146,"text":"70030146 - 2007 - Estimation of forest fuel load from radar remote sensing","interactions":[],"lastModifiedDate":"2012-03-12T17:21:10","indexId":"70030146","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1944,"text":"IEEE Transactions on Geoscience and Remote Sensing","active":true,"publicationSubtype":{"id":10}},"title":"Estimation of forest fuel load from radar remote sensing","docAbstract":"Understanding fire behavior characteristics and planning for fire management require maps showing the distribution of wildfire fuel loads at medium to fine spatial resolution across large landscapes. Radar sensors from airborne or spaceborne platforms have the potential of providing quantitative information about the forest structure and biomass components that can be readily translated to meaningful fuel load estimates for fire management. In this paper, we used multifrequency polarimetric synthetic aperture radar (SAR) imagery acquired over a large area of the Yellowstone National Park by the Airborne SAR sensor to estimate the distribution of forest biomass and canopy fuel loads. Semiempirical algorithms were developed to estimate crown and stem biomass and three major fuel load parameters, namely: 1) canopy fuel weight; 2) canopy bulk density; and 3) foliage moisture content. These estimates, when compared directly to measurements made at plot and stand levels, provided more than 70% accuracy and, when partitioned into fuel load classes, provided more than 85% accuracy. Specifically, the radar-generated fuel parameters were in good agreement with the field-based fuel measurements, resulting in coefficients of determination of R2 = 85 for the canopy fuel weight, R 2 = 0.84 for canopy bulk density, and R2 =0.78 for the foliage biomass. ?? 2007 IEEE.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"IEEE Transactions on Geoscience and Remote Sensing","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1109/TGRS.2006.887002","issn":"01962892","usgsCitation":"Saatchi, S., Halligan, K., Despain, D.G., and Crabtree, R., 2007, Estimation of forest fuel load from radar remote sensing: IEEE Transactions on Geoscience and Remote Sensing, v. 45, no. 6, p. 1726-1740, https://doi.org/10.1109/TGRS.2006.887002.","startPage":"1726","endPage":"1740","numberOfPages":"15","costCenters":[],"links":[{"id":212880,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1109/TGRS.2006.887002"},{"id":240439,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0b8be4b0c8380cd5277f","contributors":{"authors":[{"text":"Saatchi, S.","contributorId":104711,"corporation":false,"usgs":true,"family":"Saatchi","given":"S.","email":"","affiliations":[],"preferred":false,"id":425897,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Halligan, K.","contributorId":27679,"corporation":false,"usgs":true,"family":"Halligan","given":"K.","email":"","affiliations":[],"preferred":false,"id":425894,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Despain, Don G.","contributorId":31147,"corporation":false,"usgs":true,"family":"Despain","given":"Don","email":"","middleInitial":"G.","affiliations":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"preferred":false,"id":425895,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Crabtree, R.L.","contributorId":91696,"corporation":false,"usgs":true,"family":"Crabtree","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":425896,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70030156,"text":"70030156 - 2007 - Arsenic, cadmium, lead, and zinc in the Danville and Springfield coal members (Pennsylvanian) from Indiana","interactions":[],"lastModifiedDate":"2012-03-12T17:21:37","indexId":"70030156","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2033,"text":"International Journal of Coal Geology","active":true,"publicationSubtype":{"id":10}},"title":"Arsenic, cadmium, lead, and zinc in the Danville and Springfield coal members (Pennsylvanian) from Indiana","docAbstract":"Arsenic, cadmium, lead, and zinc contents and distributions are discussed in two major Pennsylvanian coal beds in Indiana: the Danville Coal Member and the Springfield Coal Member. Arsenic contents of the Danville and Springfield coals show similar ranges from 0.5 to 43??ppm for the Danville Coal and 1 to 50??ppm for the Springfield Coal, with an average of 12.7??ppm for the Danville and 9.4??ppm for the Springfield Coal. Cadmium concentrations do not exceed 9??ppm, with an average of 0.4 for Danville and 0.7??ppm for the Springfield. Average Pb contents are 21.3 and 6.3??ppm, whereas Zn contents are 101 and 54??ppm for the Danville and the Springfield, respectively. The distribution of these elements varies both laterally and vertically within the coals, as functions of their mineral associations and the time of their emplacement. ?? 2006 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"International Journal of Coal Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.coal.2006.05.005","issn":"01665162","usgsCitation":"Mastalerz, M., and Drobniak, A., 2007, Arsenic, cadmium, lead, and zinc in the Danville and Springfield coal members (Pennsylvanian) from Indiana: International Journal of Coal Geology, v. 71, no. 1 SPEC. ISS., p. 37-53, https://doi.org/10.1016/j.coal.2006.05.005.","startPage":"37","endPage":"53","numberOfPages":"17","costCenters":[],"links":[{"id":213053,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.coal.2006.05.005"},{"id":240634,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"71","issue":"1 SPEC. ISS.","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ed98e4b0c8380cd498d8","contributors":{"authors":[{"text":"Mastalerz, Maria","contributorId":78065,"corporation":false,"usgs":true,"family":"Mastalerz","given":"Maria","affiliations":[],"preferred":false,"id":425934,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Drobniak, A.","contributorId":11748,"corporation":false,"usgs":true,"family":"Drobniak","given":"A.","affiliations":[],"preferred":false,"id":425933,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70030158,"text":"70030158 - 2007 - Identifying fecal sources in a selected catchment reach using multiple source-tracking tools","interactions":[],"lastModifiedDate":"2012-03-12T17:21:38","indexId":"70030158","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":"Identifying fecal sources in a selected catchment reach using multiple source-tracking tools","docAbstract":"Given known limitations of current microbial source-tracking (MST) tools, emphasis on small, simple study areas may enhance interpretations of fecal contamination sources in streams. In this study, three MST tools - Escherichia coli repetitive element polymerase chain reaction (rep-PCR), coliphage typing, and Bacteroidales 16S rDNA host-associated markers - were evaluated in a selected reach of Plum Creek in sooth-central Nebraska. Water-quality samples were collected from six sites. One reach was selected for MST evaluation based on observed patterns of E. coli contamination. Despite high E. coli concentrations, coliphages were detected only once among water samples, precluding their use as a MST tool in this setting. Rep-PCR classification of E. coli isolates from both water and sediment samples supported the hypothesis that cattle and wildlife were dominant sources of fecal contamination, with minor contributions by horses and humans. Conversely, neither ruminant nor human sources were detected by Bacteroidales markers in most water samples. In bed sediment, ruminant- and human-associated Bacteroidales markers were detected throughout the interval from 0 to 0.3 m, with detections independent of E. coli concentrations in the sediment. Although results by E. coli-based and Bacteroidales-based MST methods led to similar interpretations, detection of Bacteroidales markers in sediment more commonly than in water indicates that different tools to track fecal contamination (in this case, tools based on Bacteroidales DNA and E. coli isolates) may have varying relevance to the more specific goal of tracking the sources of E. coli in watersheds. This is the first report of simultaneous, toolbox approach application of a library-based and marker-based MST analyses to lowing surface water. ?? ASA, CSSA, SSSA.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Environmental Quality","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2134/jeq2006.0246","issn":"00472425","usgsCitation":"Vogel, J.R., Stoeckel, D.M., Lamendella, R., Zelt, R.B., Santo, D.J., Walker, S., and Oerther, D., 2007, Identifying fecal sources in a selected catchment reach using multiple source-tracking tools: Journal of Environmental Quality, v. 36, no. 3, p. 718-729, https://doi.org/10.2134/jeq2006.0246.","startPage":"718","endPage":"729","numberOfPages":"12","costCenters":[],"links":[{"id":213079,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2134/jeq2006.0246"},{"id":240666,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"36","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a384ce4b0c8380cd61505","contributors":{"authors":[{"text":"Vogel, J. R.","contributorId":21639,"corporation":false,"usgs":true,"family":"Vogel","given":"J.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":425942,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stoeckel, D. M.","contributorId":84855,"corporation":false,"usgs":true,"family":"Stoeckel","given":"D.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":425945,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lamendella, R.","contributorId":15833,"corporation":false,"usgs":true,"family":"Lamendella","given":"R.","email":"","affiliations":[],"preferred":false,"id":425941,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Zelt, R. B.","contributorId":34913,"corporation":false,"usgs":true,"family":"Zelt","given":"R.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":425943,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Santo, Domingo J.W.","contributorId":40022,"corporation":false,"usgs":true,"family":"Santo","given":"Domingo","email":"","middleInitial":"J.W.","affiliations":[],"preferred":false,"id":425944,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Walker, S.R.","contributorId":8679,"corporation":false,"usgs":true,"family":"Walker","given":"S.R.","email":"","affiliations":[],"preferred":false,"id":425940,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Oerther, D.B.","contributorId":93702,"corporation":false,"usgs":true,"family":"Oerther","given":"D.B.","email":"","affiliations":[],"preferred":false,"id":425946,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70030120,"text":"70030120 - 2007 - Habitat relationships of birds overwintering in a managed coastal prairie","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70030120","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3784,"text":"Wilson Journal of Ornithology","active":true,"publicationSubtype":{"id":10}},"title":"Habitat relationships of birds overwintering in a managed coastal prairie","docAbstract":"Grassland birds are considered to be rapidly declining in North America. Management approaches for grassland birds frequently rely on prescribed burning to maintain habitat in suitable condition. We evaluated the relationships among years since burn, vegetation structure, and overwintering grassland bird abundance in coastal prairie. Le Conte's Sparrows (Ammodramus leconteii) were most common in areas that had: (1) been burned within the previous 2 years, (2) medium density herbaceous vegetation, and (3) sparse shrub densities. Savannah Sparrows (Passerculus sandwichensis) were associated with areas: (1) burned within 1 year, (2) with sparse herbaceous vegetation, and (3) with sparse shrub densities. Sedge Wrens (Cistothorus platensis) were most common in areas that had: (1) burned greater than 2 years prior and (2) dense herbaceous vegetation. Swamp Sparrows (Melospiza georgiana): (1) were most common in areas of dense shrubs, (2) not related to time since burnings, and (3) demonstrated no relationship to herbaceous vegetation densities. The relationships to fire histories for all four bird species could be explained by the associated vegetation characteristics indicating the need for a mosaic of burn rotations and modest levels of woody vegetation.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Wilson Journal of Ornithology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1676/05-129.1","issn":"15594491","usgsCitation":"Baldwin, H., Grace, J., Barrow, W., and Rohwer, F., 2007, Habitat relationships of birds overwintering in a managed coastal prairie: Wilson Journal of Ornithology, v. 119, no. 2, p. 189-197, https://doi.org/10.1676/05-129.1.","startPage":"189","endPage":"197","numberOfPages":"9","costCenters":[],"links":[{"id":212993,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1676/05-129.1"},{"id":240569,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"119","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a2f1ae4b0c8380cd5cab7","contributors":{"authors":[{"text":"Baldwin, H.Q.","contributorId":27680,"corporation":false,"usgs":true,"family":"Baldwin","given":"H.Q.","email":"","affiliations":[],"preferred":false,"id":425798,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Grace, J.B. 0000-0001-6374-4726","orcid":"https://orcid.org/0000-0001-6374-4726","contributorId":38938,"corporation":false,"usgs":true,"family":"Grace","given":"J.B.","affiliations":[],"preferred":false,"id":425799,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Barrow, W.C. Jr. 0000-0003-4671-2823","orcid":"https://orcid.org/0000-0003-4671-2823","contributorId":11183,"corporation":false,"usgs":true,"family":"Barrow","given":"W.C.","suffix":"Jr.","affiliations":[],"preferred":false,"id":425796,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rohwer, F.C.","contributorId":26043,"corporation":false,"usgs":true,"family":"Rohwer","given":"F.C.","email":"","affiliations":[],"preferred":false,"id":425797,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70030354,"text":"70030354 - 2007 - Red-shouldered hawk occupancy surveys in central Minnesota, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:03","indexId":"70030354","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Red-shouldered hawk occupancy surveys in central Minnesota, USA","docAbstract":"Forest-dwelling raptors are often difficult to detect because many species occur at low density or are secretive. Broadcasting conspecific vocalizations can increase the probability of detecting forest-dwelling raptors and has been shown to be an effective method for locating raptors and assessing their relative abundance. Recent advances in statistical techniques based on presence-absence data use probabilistic arguments to derive probability of detection when it is <1 and to provide a model and likelihood-based method for estimating proportion of sites occupied. We used these maximum-likelihood models with data from red-shouldered hawk (Buteo lineatus) call-broadcast surveys conducted in central Minnesota, USA, in 1994-1995 and 2004-2005. Our objectives were to obtain estimates of occupancy and detection probability 1) over multiple sampling seasons (yr), 2) incorporating within-season time-specific detection probabilities, 3) with call type and breeding stage included as covariates in models of probability of detection, and 4) with different sampling strategies. We visited individual survey locations 2-9 times per year, and estimates of both probability of detection (range = 0.28-0.54) and site occupancy (range = 0.81-0.97) varied among years. Detection probability was affected by inclusion of a within-season time-specific covariate, call type, and breeding stage. In 2004 and 2005 we used survey results to assess the effect that number of sample locations, double sampling, and discontinued sampling had on parameter estimates. We found that estimates of probability of detection and proportion of sites occupied were similar across different sampling strategies, and we suggest ways to reduce sampling effort in a monitoring program.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Wildlife Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2193/2006-013","issn":"00225","usgsCitation":"Henneman, C., McLeod, M., and Andersen, D., 2007, Red-shouldered hawk occupancy surveys in central Minnesota, USA: Journal of Wildlife Management, v. 71, no. 2, p. 526-533, https://doi.org/10.2193/2006-013.","startPage":"526","endPage":"533","numberOfPages":"8","costCenters":[],"links":[{"id":211950,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2193/2006-013"},{"id":239338,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"71","issue":"2","noUsgsAuthors":false,"publicationDate":"2010-12-13","publicationStatus":"PW","scienceBaseUri":"50e4a3a0e4b0e8fec6cdb8de","contributors":{"authors":[{"text":"Henneman, C.","contributorId":64879,"corporation":false,"usgs":true,"family":"Henneman","given":"C.","affiliations":[],"preferred":false,"id":426816,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McLeod, M.A.","contributorId":66437,"corporation":false,"usgs":true,"family":"McLeod","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":426817,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Andersen, D. E.","contributorId":27816,"corporation":false,"usgs":true,"family":"Andersen","given":"D. E.","affiliations":[],"preferred":false,"id":426815,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70030212,"text":"70030212 - 2007 - Sub-sampling genetic data to estimate black bear population size: A case study","interactions":[],"lastModifiedDate":"2021-06-11T18:04:08.647347","indexId":"70030212","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3671,"text":"Ursus","active":true,"publicationSubtype":{"id":10}},"title":"Sub-sampling genetic data to estimate black bear population size: A case study","docAbstract":"

Costs for genetic analysis of hair samples collected for individual identification of bears average approximately US$50 [2004] per sample. This can easily exceed budgetary allowances for large-scale studies or studies of high-density bear populations. We used 2 genetic datasets from 2 areas in the southeastern United States to explore how reducing costs of analysis by sub-sampling affected precision and accuracy of resulting population estimates. We used several sub-sampling scenarios to create subsets of the full datasets and compared summary statistics, population estimates, and precision of estimates generated from these subsets to estimates generated from the complete datasets. Our results suggested that bias and precision of estimates improved as the proportion of total samples used increased, and heterogeneity models (e.g., Mh[Chao]) were more robust to reduced sample sizes than other models (e.g., behavior models). We recommend that only high-quality samples (>5 hair follicles) be used when budgets are constrained, and efforts should be made to maximize capture and recapture rates in the field.

","largerWorkTitle":"Ursus","language":"English","publisher":"BioOne Complete","doi":"10.2192/1537-6176(2007)18[179:SGDTEB]2.0.CO;2","usgsCitation":"Tredick, C., Vaughan, M., Stauffer, D., Simek, S., and Eason, T., 2007, Sub-sampling genetic data to estimate black bear population size: A case study: Ursus, v. 18, no. 2, p. 179-188, https://doi.org/10.2192/1537-6176(2007)18[179:SGDTEB]2.0.CO;2.","productDescription":"10 p.","startPage":"179","endPage":"188","costCenters":[],"links":[{"id":239293,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"southeastern United States","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -94.04296874999999,\n 31.353636941500987\n ],\n [\n -93.515625,\n 29.38217507514529\n ],\n [\n -89.56054687499999,\n 29.075375179558346\n ],\n [\n -85.69335937499999,\n 29.53522956294847\n ],\n [\n -83.056640625,\n 27.21555620902969\n ],\n [\n -80.947265625,\n 24.926294766395593\n ],\n [\n -79.541015625,\n 26.27371402440643\n ],\n [\n -80.68359375,\n 31.12819929911196\n ],\n [\n -75.41015624999999,\n 35.67514743608467\n ],\n [\n -77.080078125,\n 39.095962936305476\n ],\n [\n -79.365234375,\n 38.47939467327645\n ],\n [\n -81.5625,\n 37.23032838760387\n ],\n [\n -84.0234375,\n 39.027718840211605\n ],\n [\n -87.71484375,\n 37.78808138412046\n ],\n [\n -89.384765625,\n 36.527294814546245\n ],\n [\n -94.5703125,\n 36.59788913307022\n ],\n [\n -94.04296874999999,\n 31.353636941500987\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"18","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9cf6e4b08c986b31d563","contributors":{"authors":[{"text":"Tredick, C.A.","contributorId":57659,"corporation":false,"usgs":true,"family":"Tredick","given":"C.A.","email":"","affiliations":[],"preferred":false,"id":426145,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Vaughan, M.R.","contributorId":74925,"corporation":false,"usgs":true,"family":"Vaughan","given":"M.R.","email":"","affiliations":[],"preferred":false,"id":426146,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Stauffer, D.F.","contributorId":9317,"corporation":false,"usgs":true,"family":"Stauffer","given":"D.F.","email":"","affiliations":[],"preferred":false,"id":426143,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Simek, S.L.","contributorId":13033,"corporation":false,"usgs":true,"family":"Simek","given":"S.L.","email":"","affiliations":[],"preferred":false,"id":426144,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Eason, T.","contributorId":106705,"corporation":false,"usgs":true,"family":"Eason","given":"T.","affiliations":[],"preferred":false,"id":426147,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70030186,"text":"70030186 - 2007 - Potential effects of regional pumpage on groundwater age distribution","interactions":[],"lastModifiedDate":"2018-10-11T19:04:32","indexId":"70030186","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Potential effects of regional pumpage on groundwater age distribution","docAbstract":"

Groundwater ages estimated from environmental tracers can help calibrate groundwater flow models. Groundwater age represents a mixture of traveltimes, with the distribution of ages determined by the detailed structure of the flow field, which can be prone to significant transient variability. Effects of pumping on age distribution were assessed using direct age simulation in a hypothetical layered aquifer system. A steady state predevelopment age distribution was computed first. A well field was then introduced, and pumpage caused leakage into the confined aquifer of older water from an overlying confining unit. Large changes in simulated groundwater ages occurred in both the aquifer and the confining unit at high pumping rates, and the effects propagated a substantial distance downgradient from the wells. The range and variance of ages contributing to the well increased substantially during pumping. The results suggest that the groundwater age distribution in developed aquifers may be affected by transient leakage from low‐permeability material, such as confining units, under certain hydrogeologic conditions.

","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2006WR004865","usgsCitation":"Zinn, B.A., and Konikow, L.F., 2007, Potential effects of regional pumpage on groundwater age distribution: Water Resources Research, v. 43, no. 6, W06418; 17 p., https://doi.org/10.1029/2006WR004865.","productDescription":"W06418; 17 p.","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":477032,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006wr004865","text":"Publisher Index Page"},{"id":239431,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"43","issue":"6","noUsgsAuthors":false,"publicationDate":"2007-06-21","publicationStatus":"PW","scienceBaseUri":"505a7edde4b0c8380cd7a7c9","contributors":{"authors":[{"text":"Zinn, Brendan A.","contributorId":102953,"corporation":false,"usgs":true,"family":"Zinn","given":"Brendan","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":426060,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Konikow, Leonard F. 0000-0002-0940-3856 lkonikow@usgs.gov","orcid":"https://orcid.org/0000-0002-0940-3856","contributorId":158,"corporation":false,"usgs":true,"family":"Konikow","given":"Leonard","email":"lkonikow@usgs.gov","middleInitial":"F.","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":426059,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70030185,"text":"70030185 - 2007 - Comparative toxicity of chlorpyrifos, diazinon, malathion and their oxon derivatives to larval Rana boylii","interactions":[],"lastModifiedDate":"2012-03-12T17:21:01","indexId":"70030185","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1555,"text":"Environmental Pollution","active":true,"publicationSubtype":{"id":10}},"title":"Comparative toxicity of chlorpyrifos, diazinon, malathion and their oxon derivatives to larval Rana boylii","docAbstract":"Organophosphorus pesticides (OPs) are ubiquitous in the environment and are highly toxic to amphibians. They deactivate cholinesterase, resulting in neurological dysfunction. Most chemicals in this group require oxidative desulfuration to achieve their greatest cholinesterase-inhibiting potencies. Oxon derivatives are formed within liver cells but also by bacterial decay of parental pesticides. This study examines the toxicity of chlorpyrifos, malathion and diazinon and their oxons on the foothill yellow-legged frog (Rana boylii). R. boylii is exposed to agricultural pesticides in the California Central Valley. Median lethal concentrations of the parental forms during a 96 h exposure were 3.00 mg/L (24 h) for chlorpyrifos, 2.14 mg/L for malathion and 7.49 mg/L for diazinon. Corresponding oxons were 10 to 100 times more toxic than their parental forms. We conclude that environmental concentrations of these pesticides can be harmful to R. boylii populations. ?? 2006 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Pollution","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.envpol.2006.10.036","issn":"02697491","usgsCitation":"Sparling, D.W., and Fellers, G., 2007, Comparative toxicity of chlorpyrifos, diazinon, malathion and their oxon derivatives to larval Rana boylii: Environmental Pollution, v. 147, no. 3, p. 535-539, https://doi.org/10.1016/j.envpol.2006.10.036.","startPage":"535","endPage":"539","numberOfPages":"5","costCenters":[],"links":[{"id":211996,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.envpol.2006.10.036"},{"id":239394,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"147","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f82ee4b0c8380cd4cf15","contributors":{"authors":[{"text":"Sparling, D. W.","contributorId":78675,"corporation":false,"usgs":true,"family":"Sparling","given":"D.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":426058,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fellers, G.","contributorId":42167,"corporation":false,"usgs":true,"family":"Fellers","given":"G.","affiliations":[],"preferred":false,"id":426057,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70030184,"text":"70030184 - 2007 - Possible use of foresight, understanding, and planning by wolves hunting muskoxen","interactions":[],"lastModifiedDate":"2023-08-11T16:27:04.164934","indexId":"70030184","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":894,"text":"Arctic","active":true,"publicationSubtype":{"id":10}},"title":"Possible use of foresight, understanding, and planning by wolves hunting muskoxen","docAbstract":"

On Ellesmere Island in 2006, arctic wolves (Canis lupus arctos) were observed making a two-pronged approach to a herd of muskoxen (Ovibos moschatus) and, on another occasion, ambushing muskoxen. Both observations seemed to provide evidence that the wolves were using foresight, understanding, and planning. Although the possible use of insight and purposiveness has been documented in captive wolves, the present report is one of the few to document the possibility that freeranging wolves use these other three mental processes.

","language":"English","publisher":"Arctic Institute of North America","doi":"10.14430/arctic239","usgsCitation":"Mech, L.D., 2007, Possible use of foresight, understanding, and planning by wolves hunting muskoxen: Arctic, v. 60, no. 2, p. 145-149, https://doi.org/10.14430/arctic239.","productDescription":"5 p.","startPage":"145","endPage":"149","costCenters":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":476995,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.14430/arctic239","text":"Publisher Index Page"},{"id":239393,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"60","issue":"2","noUsgsAuthors":false,"publicationDate":"2009-12-11","publicationStatus":"PW","scienceBaseUri":"505a7e41e4b0c8380cd7a421","contributors":{"authors":[{"text":"Mech, L. David 0000-0003-3944-7769 david_mech@usgs.gov","orcid":"https://orcid.org/0000-0003-3944-7769","contributorId":2518,"corporation":false,"usgs":true,"family":"Mech","given":"L.","email":"david_mech@usgs.gov","middleInitial":"David","affiliations":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"preferred":true,"id":426056,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70030171,"text":"70030171 - 2007 - Rip currents, mega-cusps, and eroding dunes","interactions":[],"lastModifiedDate":"2014-10-07T14:01:16","indexId":"70030171","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2667,"text":"Marine Geology","active":true,"publicationSubtype":{"id":10}},"title":"Rip currents, mega-cusps, and eroding dunes","docAbstract":"

Dune erosion is shown to occur at the embayment of beach mega-cusps O(200 m alongshore) that are associated with rip currents. The beach is the narrowest at the embayment of the mega-cusps allowing the swash of large storm waves coincident with high tides to reach the toe of the dune, to undercut the dune and to cause dune erosion. Field measurements of dune, beach, and rip current morphology are acquired along an 18 km shoreline in southern Monterey Bay, California. This section of the bay consists of a sandy shoreline backed by extensive dunes, rising to heights exceeding 40 m. There is a large increase in wave height going from small wave heights in the shadow of a headland, to the center of the bay where convergence of waves owing to refraction over the Monterey Bay submarine canyon results in larger wave heights. The large alongshore gradient in wave height results in a concomitant alongshore gradient in morphodynamic scale. The strongly refracted waves and narrow bay aperture result in near normal wave incidence, resulting in well-developed, persistent rip currents along the entire shoreline.

\n
\n

The alongshore variations of the cuspate shoreline are found significantly correlated with the alongshore variations in rip spacing at 95% confidence. The alongshore variations of the volume of dune erosion are found significantly correlated with alongshore variations of the cuspate shoreline at 95% confidence. Therefore, it is concluded the mega-cusps are associated with rip currents and that the location of dune erosion is associated with the embayment of the mega-cusp.

","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Marine Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.margeo.2007.02.018","issn":"00253227","usgsCitation":"Thornton, E., MacMahan, J., and Sallenger, A.H., 2007, Rip currents, mega-cusps, and eroding dunes: Marine Geology, v. 240, no. 1-4, p. 151-167, https://doi.org/10.1016/j.margeo.2007.02.018.","productDescription":"17 p.","startPage":"151","endPage":"167","numberOfPages":"17","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":476961,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://hdl.handle.net/10945/45799","text":"External Repository"},{"id":212795,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.margeo.2007.02.018"},{"id":240336,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"240","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aad71e4b0c8380cd86edf","contributors":{"authors":[{"text":"Thornton, E.B.","contributorId":103828,"corporation":false,"usgs":true,"family":"Thornton","given":"E.B.","affiliations":[],"preferred":false,"id":425994,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"MacMahan, J.","contributorId":99378,"corporation":false,"usgs":true,"family":"MacMahan","given":"J.","affiliations":[],"preferred":false,"id":425993,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Sallenger, A. H. Jr.","contributorId":8818,"corporation":false,"usgs":true,"family":"Sallenger","given":"A.","suffix":"Jr.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":425992,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70030170,"text":"70030170 - 2007 - Pathophysiology of white-tailed deer vaccinated with porcine zona pellucida immunocontraceptive","interactions":[],"lastModifiedDate":"2012-03-12T17:21:06","indexId":"70030170","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3673,"text":"Vaccine","active":true,"publicationSubtype":{"id":10}},"title":"Pathophysiology of white-tailed deer vaccinated with porcine zona pellucida immunocontraceptive","docAbstract":"White-tailed deer (n = 14 treated, n = 7 control) were examined postmortem to identify any possible pathophysiology resulting from PZP immunocontraception vaccination. Deer were treated twice in 1997; given a booster in 1998, with six being revaccinated in September 2000. Granulomas were found at injection sites of most deer, even 2 years post-treatment. Eosinophilic oophoritis occurred in 6 of 8 (75%) deer vaccinated in 1998, and 3 of 6 (50%) revaccinated in 2000. The 2000 revaccinates without oophoritis, had significantly fewer normal secondary follicles than control females (P = 0.03), and deer in the1998 treatment group (P = 0.04). PZP immunocontraceptive vaccine elicited ovarian pathologies in deer similar to those observed in other species. ?? 2007 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Vaccine","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.vaccine.2007.03.033","issn":"0264410X","usgsCitation":"Curtis, P.D., Richmond, M.E., Miller, L., and Quimby, F., 2007, Pathophysiology of white-tailed deer vaccinated with porcine zona pellucida immunocontraceptive: Vaccine, v. 25, no. 23, p. 4623-4630, https://doi.org/10.1016/j.vaccine.2007.03.033.","startPage":"4623","endPage":"4630","numberOfPages":"8","costCenters":[],"links":[{"id":212794,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.vaccine.2007.03.033"},{"id":240335,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"25","issue":"23","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a75aae4b0c8380cd77c86","contributors":{"authors":[{"text":"Curtis, Paul D.","contributorId":83633,"corporation":false,"usgs":true,"family":"Curtis","given":"Paul","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":425991,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Richmond, M. E.","contributorId":22729,"corporation":false,"usgs":true,"family":"Richmond","given":"M.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":425989,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Miller, L.A.","contributorId":39178,"corporation":false,"usgs":true,"family":"Miller","given":"L.A.","email":"","affiliations":[],"preferred":false,"id":425990,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Quimby, F.W.","contributorId":7089,"corporation":false,"usgs":true,"family":"Quimby","given":"F.W.","email":"","affiliations":[],"preferred":false,"id":425988,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70030168,"text":"70030168 - 2007 - Evaluation of potentially nonlethal sampling methods for monitoring mercury concentrations in smallmouth bass (Micropterus dolomieu)","interactions":[],"lastModifiedDate":"2016-06-01T16:21:36","indexId":"70030168","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":887,"text":"Archives of Environmental Contamination and Toxicology","active":true,"publicationSubtype":{"id":10}},"title":"Evaluation of potentially nonlethal sampling methods for monitoring mercury concentrations in smallmouth bass (Micropterus dolomieu)","docAbstract":"

We evaluated three potentially nonlethal alternatives to fillet sampling for the determination of mercury (Hg) concentrations in smallmouth bass (Micropterus dolomieu). Fish (n = 62, 226-464 mm total length) from six sites in southern Missouri were captured by electrofishing. Blood samples (1 mL) from each fish were obtained by caudal veinipuncture with a heparinized needle and syringe. Biopsy needle (10 mm x 14 gauge; three cuts per fish; 10-20 mg total dry weight) and biopsy punch (7 mm x 5 mm in diameter, one plug per fish, 30-50 mg dry weight) samples were obtained from the area beneath the dorsal fin. Fillet samples were obtained from the opposite side of the fish. All samples were freeze-dried and analyzed for total Hg by combustion amalgamation atomic absorption spectrophotometry. Mean relative standard deviations (RSDs) of triplicate samples were similar for all four methods (2.2-2.4%), but the range of RSDs was greater for blood (0.4-5.5%) than for the muscle methods (1.8-4.0%). Total Hg concentrations in muscle were 0.0200-0.8809 ??g/g wet weight; concentrations in plug, needle, and fillet samples from each fish were nearly identical. Blood Hg concentrations were 0.0006-0.0812 ??g/mL and were highly correlated with muscle concentrations; linear regressions between log-transformed blood and fillet Hg concentrations were linear and statistically significant (p < 0.01), and explained 91-93% of the total variation. Correlations between fillet Hg concentrations and fish size and age were weak; together they explained ???37% of the total variation, and the relations differed among sites. Overall, any of the alternative methods could provide satisfactory estimates of fillet Hg in smallmouth bass; however, both blood and plug sampling with disposable instruments were easier to perform than needle sampling. The biopsy needle was the most difficult to use, especially on smaller fish, and its relative expense necessitates reuse and, consequently, thorough cleaning between fish to prevent cross-contamination. ?? 2007 Springer Science+Business Media, LLC.

","language":"English","publisher":"Springer-Verlag","doi":"10.1007/s00244-006-0214-0","issn":"00904341","usgsCitation":"Schmitt, C., and Brumbaugh, W.G., 2007, Evaluation of potentially nonlethal sampling methods for monitoring mercury concentrations in smallmouth bass (Micropterus dolomieu): Archives of Environmental Contamination and Toxicology, v. 53, no. 1, p. 84-95, https://doi.org/10.1007/s00244-006-0214-0.","productDescription":"12 p.","startPage":"84","endPage":"95","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"links":[{"id":240301,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212765,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s00244-006-0214-0"}],"country":"United States","state":"Missouri","otherGeospatial":"Southeast Missouri","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -90.274658203125,\n 38.09133660751176\n ],\n [\n -91.417236328125,\n 38.134556577054134\n ],\n [\n -91.38427734374999,\n 36.56260003738548\n ],\n [\n -90.164794921875,\n 36.474306755095206\n ],\n [\n -89.5166015625,\n 36.48314061639213\n ],\n [\n -89.154052734375,\n 36.77409249464195\n ],\n [\n -89.219970703125,\n 37.046408899699564\n ],\n [\n -89.4287109375,\n 37.06394430056685\n ],\n [\n -89.49462890625,\n 37.309014074275915\n ],\n [\n -89.549560546875,\n 37.67512527892127\n ],\n [\n -90.186767578125,\n 38.07404145941957\n ],\n [\n -90.274658203125,\n 38.09133660751176\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"53","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-05-04","publicationStatus":"PW","scienceBaseUri":"505a0caee4b0c8380cd52c59","contributors":{"authors":[{"text":"Schmitt, C. J. 0000-0001-6804-2360","orcid":"https://orcid.org/0000-0001-6804-2360","contributorId":56339,"corporation":false,"usgs":true,"family":"Schmitt","given":"C. J.","affiliations":[],"preferred":false,"id":425983,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Brumbaugh, W. G.","contributorId":106441,"corporation":false,"usgs":true,"family":"Brumbaugh","given":"W.","email":"","middleInitial":"G.","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":425984,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70030178,"text":"70030178 - 2007 - Quantitative mineralogy of surface sediments of the Iceland shelf, and application to down-core studies of holocene ice-rafted sediments","interactions":[],"lastModifiedDate":"2012-03-12T17:21:01","indexId":"70030178","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2451,"text":"Journal of Sedimentary Research","onlineIssn":"1938-3681","printIssn":"1527-1404","active":true,"publicationSubtype":{"id":10}},"title":"Quantitative mineralogy of surface sediments of the Iceland shelf, and application to down-core studies of holocene ice-rafted sediments","docAbstract":"Quantitative X-ray diffraction analyses on the < 2 mm sediment fraction from the Iceland shelves are reported for subglacial diamictons, seafloor surface sediments, and the last 2000 cal yr BP from two cores. The overall goal of the paper is to characterize the spatial variability of the mineralogy of the present-day surface sediments (18 non-clay minerals and 7 clay minerals), compare that with largely in situ erosional products typified by the composition of subglacial diamictons, and finally examine the late Holocene temporal variability in mineral composition using multi-mineral compositions. The subglacial diamictons are dominated in the non-clay-mineral fraction by the plagioclase feldspars and pyroxene with 36.7 ?? 6.1 and 17.9 ?? 3.5 wt % respectively, with smectites being the dominant clay minerals. The surface seafloor sediments have similar compositions although there are substantial amounts of calcite, plus there is a distinct band of sites from NW to N-central Iceland that contain 1-6 wt% of quartz. This latter distribution mimics the modern and historic pattern of drift ice in Iceland waters. Principal component analysis of the transformed wt% (log-ratio) non-clay minerals is used to compare the subglacial, surface, and down-core mineral compositions. Fifty-eight percent of the variance is explained by the first two axes, with dolomite, microcline, and quartz being important \"foreign\" species. These analyses indicate that today the NW-N-central Iceland shelf is affected by the import of exotic minerals, which are transported and released from drift ice. The down-core mineralogy indicates that this is a process that has varied over the last 2000 cal yr BP. Copyright ?? 2007, SEPM (Society for Sedimentary Geology).","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Sedimentary Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2110/jsr.2007.045","issn":"15271404","usgsCitation":"Andrews, J.T., and Eberl, D.D., 2007, Quantitative mineralogy of surface sediments of the Iceland shelf, and application to down-core studies of holocene ice-rafted sediments: Journal of Sedimentary Research, v. 77, no. 5-6, p. 469-479, https://doi.org/10.2110/jsr.2007.045.","startPage":"469","endPage":"479","numberOfPages":"11","costCenters":[],"links":[{"id":211940,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2110/jsr.2007.045"},{"id":239326,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"77","issue":"5-6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a9225e4b0c8380cd806ae","contributors":{"authors":[{"text":"Andrews, John T.","contributorId":79678,"corporation":false,"usgs":true,"family":"Andrews","given":"John","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":426031,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Eberl, D. D.","contributorId":66282,"corporation":false,"usgs":true,"family":"Eberl","given":"D.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":426030,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70030177,"text":"70030177 - 2007 - Chemical quality of depositional sediments and associated soils in New Orleans and the Louisiana peninsula following Hurricane Katrina","interactions":[],"lastModifiedDate":"2012-03-12T17:21:01","indexId":"70030177","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":"Chemical quality of depositional sediments and associated soils in New Orleans and the Louisiana peninsula following Hurricane Katrina","docAbstract":"Hurricane Katrina made landfall on the Louisiana peninsula south of New Orleans on Aug 29, 2005. The resulting storm surge caused numerous levy breaches in the parishes of New Orleans as well as on the Louisiana peninsula. This study was conducted to determine the concentrations of inorganic and organic constituents in sediments and associated soils in New Orleans parishes and the Louisiana peninsula after the floodwaters had been removed and/or receded following Hurricane Katrina. A total of 46 sediment and soil samples were analyzed that were collected throughout New Orleans and the Louisiana peninsula. Approximately 20% of the sediment samples were analyzed, including shallow sediment samples from locations that included the top and beneath automobiles, in residential and commercial areas, and near refineries. Gasoline constituents, pesticides, and leachable heavy metals were analyzed using headspace gas chromatography/mass spectrometry (GC/MS), organic extraction GC/MS, and inductively coupled plasma/mass spectrometry, respectively. A significant number of samples had leachable As and Pb concentrations in excess of drinking water standards. The remaining metals analyzed (i.e., Cd, Cr, Cu, Hg, and V) generally had much lower leachable levels. Of the gasoline constituents, only benzene was observed above the limit of detection (of 5 ??g/kg), with no samples observed as being above the method detection limits of 10 ??g/kg. For the 18 pesticides analyzed, most were in the nondetectable range and all were in trace amounts that were orders of magnitude below regulatory guidelines. ?? 2007 American Chemical Society.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Science and Technology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1021/es0620991","issn":"0013936X","usgsCitation":"Adams, C., Witt, E., Wang, J., Shaver, D., Summers, D., Filali-Meknassi, Y., Shi, H., Luna, R., and Anderson, N., 2007, Chemical quality of depositional sediments and associated soils in New Orleans and the Louisiana peninsula following Hurricane Katrina: Environmental Science & Technology, v. 41, no. 10, p. 3437-3443, https://doi.org/10.1021/es0620991.","startPage":"3437","endPage":"3443","numberOfPages":"7","costCenters":[],"links":[{"id":239290,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211911,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1021/es0620991"}],"volume":"41","issue":"10","noUsgsAuthors":false,"publicationDate":"2007-04-11","publicationStatus":"PW","scienceBaseUri":"5059f584e4b0c8380cd4c28e","contributors":{"authors":[{"text":"Adams, C.","contributorId":88531,"corporation":false,"usgs":true,"family":"Adams","given":"C.","affiliations":[],"preferred":false,"id":426029,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Witt, E.C.","contributorId":83556,"corporation":false,"usgs":true,"family":"Witt","given":"E.C.","email":"","affiliations":[],"preferred":false,"id":426028,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wang, Jingyuan","contributorId":10771,"corporation":false,"usgs":false,"family":"Wang","given":"Jingyuan","email":"","affiliations":[],"preferred":false,"id":426021,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Shaver, D.K.","contributorId":17829,"corporation":false,"usgs":true,"family":"Shaver","given":"D.K.","email":"","affiliations":[],"preferred":false,"id":426022,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Summers, D.","contributorId":47579,"corporation":false,"usgs":true,"family":"Summers","given":"D.","email":"","affiliations":[],"preferred":false,"id":426025,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Filali-Meknassi, Y.","contributorId":28069,"corporation":false,"usgs":true,"family":"Filali-Meknassi","given":"Y.","affiliations":[],"preferred":false,"id":426023,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Shi, H.","contributorId":71729,"corporation":false,"usgs":true,"family":"Shi","given":"H.","email":"","affiliations":[],"preferred":false,"id":426027,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Luna, R.","contributorId":46708,"corporation":false,"usgs":true,"family":"Luna","given":"R.","email":"","affiliations":[],"preferred":false,"id":426024,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Anderson, N.","contributorId":54403,"corporation":false,"usgs":true,"family":"Anderson","given":"N.","email":"","affiliations":[],"preferred":false,"id":426026,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}} ,{"id":70030176,"text":"70030176 - 2007 - Monitoring mangrove forest dynamics of the Sundarbans in Bangladesh and India using multi-temporal satellite data from 1973 to 2000","interactions":[],"lastModifiedDate":"2017-04-14T13:16:35","indexId":"70030176","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1587,"text":"Estuarine, Coastal and Shelf Science","active":true,"publicationSubtype":{"id":10}},"title":"Monitoring mangrove forest dynamics of the Sundarbans in Bangladesh and India using multi-temporal satellite data from 1973 to 2000","docAbstract":"

Mangrove forests in many parts of the world are declining at an alarming rate—possibly even more rapidly than inland tropical forests. The rate and causes of such changes are not known. The forests themselves are dynamic in nature and are undergoing constant changes due to both natural and anthropogenic forces. Our research objective was to monitor deforestation and degradation arising from both natural and anthropogenic forces. We analyzed multi-temporal satellite data from 1970s, 1990s, and 2000s using supervised classification approach. Our spatio-temporal analysis shows that despite having the highest population density in the world in its periphery, areal extent of the mangrove forest of the Sundarbans has not changed significantly (approximately 1.2%) in the last ∼25 years. The forest is however constantly changing due to erosion, aggradation, deforestation and mangrove rehabilitation programs. The net forest area increased by 1.4% from the 1970s to 1990 and decreased by 2.5% from 1990 to 2000. The change is insignificant in the context of classification errors and the dynamic nature of mangrove forests. This is an excellent example of the co-existence of humans with terrestrial and aquatic plant and animal life. The strong commitment of governments under various protection measures such as forest reserves, wildlife sanctuaries, national parks, and international designations, is believed to be responsible for keeping this forest relatively intact (at least in terms of area). While the measured net loss of mangrove forest is not that high, the change matrix shows that turnover due to erosion, aggradation, reforestation and deforestation was much greater than net change. The forest is under threat from natural and anthropogenic forces leading to forest degradation, primarily due to top-dying disease and over-exploitation of forest resources.

","language":"English","publisher":"Elsevier","doi":"10.1016/j.ecss.2006.12.019","issn":"02727714","usgsCitation":"Giri, S., Pengra, B., Zhu, Z., Singh, A., and Tieszen, L., 2007, Monitoring mangrove forest dynamics of the Sundarbans in Bangladesh and India using multi-temporal satellite data from 1973 to 2000: Estuarine, Coastal and Shelf Science, v. 73, no. 1-2, p. 91-100, https://doi.org/10.1016/j.ecss.2006.12.019.","productDescription":"10 p.","startPage":"91","endPage":"100","numberOfPages":"10","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":239289,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211910,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.ecss.2006.12.019"}],"volume":"73","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5dbde4b0c8380cd7057c","contributors":{"authors":[{"text":"Giri, S.","contributorId":102621,"corporation":false,"usgs":true,"family":"Giri","given":"S.","email":"","affiliations":[],"preferred":false,"id":426020,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pengra, Bruce 0000-0003-2497-8284","orcid":"https://orcid.org/0000-0003-2497-8284","contributorId":58095,"corporation":false,"usgs":true,"family":"Pengra","given":"Bruce","affiliations":[],"preferred":false,"id":426018,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zhu, Z.","contributorId":10898,"corporation":false,"usgs":true,"family":"Zhu","given":"Z.","email":"","affiliations":[],"preferred":false,"id":426016,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Singh, A.","contributorId":61211,"corporation":false,"usgs":true,"family":"Singh","given":"A.","affiliations":[],"preferred":false,"id":426019,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Tieszen, L.L.","contributorId":24046,"corporation":false,"usgs":true,"family":"Tieszen","given":"L.L.","email":"","affiliations":[],"preferred":false,"id":426017,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70030175,"text":"70030175 - 2007 - The collapse of pelagic fishes in the upper San Francisco estuary","interactions":[],"lastModifiedDate":"2021-03-30T14:40:57.645549","indexId":"70030175","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":"The collapse of pelagic fishes in the upper San Francisco estuary","docAbstract":"

Although the pelagic fish community of the upper San Francisco Estuary historically has shown substantial variability, a recent collapse has captured the attention of resource managers, scientists, legislators, and the general public. The ecological and management consequences of the decline are most serious for delta smelt (Hypomesus transpacificus), a threatened species whose narrow range overlaps with large water diversions that supply water to over 25 million people. The decline occurred despite recent moderate hydrology, which typically results in at least modest recruitment, and investments of hundreds of millions of dollars in habitat restoration and environmental water allocations to support native fishes. In response to the pelagic fish collapse, an ambitious multi-hyphen;agency research team has been working since 2005 to evaluate the causes of the decline, which likely include a combination of factors: stock-recruitment effects, a decline in habitat quality, increased mortality rates, and reduced food availability due to invasive species.

","language":"English","publisher":"Taylor & Francis","doi":"10.1577/1548-8446(2007)32[270:TCOPFI]2.0.CO;2","usgsCitation":"Sommer, T., Armor, C., Baxter, R., Breuer, R., Brown, L., Chotkowski, M., Culberson, S., Feyrer, F., Gingras, M., Herbold, B., Kimmerer, W., Mueller-Solger, A., Nobriga, M., and Souza, K., 2007, The collapse of pelagic fishes in the upper San Francisco estuary: Fisheries, v. 32, no. 6, p. 270-277, https://doi.org/10.1577/1548-8446(2007)32[270:TCOPFI]2.0.CO;2.","productDescription":"8 p.","startPage":"270","endPage":"277","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":239257,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Upper San Francisco Estuary","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n 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T.","contributorId":106703,"corporation":false,"usgs":true,"family":"Sommer","given":"T.","email":"","affiliations":[],"preferred":false,"id":426015,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Armor, C.","contributorId":76942,"corporation":false,"usgs":true,"family":"Armor","given":"C.","email":"","affiliations":[],"preferred":false,"id":426011,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Baxter, R.","contributorId":48758,"corporation":false,"usgs":true,"family":"Baxter","given":"R.","email":"","affiliations":[],"preferred":false,"id":426006,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Breuer, R.","contributorId":16219,"corporation":false,"usgs":true,"family":"Breuer","given":"R.","email":"","affiliations":[],"preferred":false,"id":426003,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Brown, L. 0000-0001-6702-4531","orcid":"https://orcid.org/0000-0001-6702-4531","contributorId":56995,"corporation":false,"usgs":true,"family":"Brown","given":"L.","affiliations":[],"preferred":false,"id":426007,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Chotkowski, M.","contributorId":78543,"corporation":false,"usgs":true,"family":"Chotkowski","given":"M.","affiliations":[],"preferred":false,"id":426012,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Culberson, S.","contributorId":96480,"corporation":false,"usgs":true,"family":"Culberson","given":"S.","affiliations":[],"preferred":false,"id":426014,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Feyrer, F. 0000-0003-1253-2349","orcid":"https://orcid.org/0000-0003-1253-2349","contributorId":6254,"corporation":false,"usgs":true,"family":"Feyrer","given":"F.","affiliations":[],"preferred":false,"id":426002,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Gingras, M.","contributorId":58093,"corporation":false,"usgs":true,"family":"Gingras","given":"M.","affiliations":[],"preferred":false,"id":426008,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Herbold, B.","contributorId":66062,"corporation":false,"usgs":true,"family":"Herbold","given":"B.","affiliations":[],"preferred":false,"id":426009,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Kimmerer, W.","contributorId":38325,"corporation":false,"usgs":false,"family":"Kimmerer","given":"W.","email":"","affiliations":[],"preferred":false,"id":426005,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Mueller-Solger, A.","contributorId":16220,"corporation":false,"usgs":true,"family":"Mueller-Solger","given":"A.","affiliations":[],"preferred":false,"id":426004,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Nobriga, M.","contributorId":67284,"corporation":false,"usgs":true,"family":"Nobriga","given":"M.","affiliations":[],"preferred":false,"id":426010,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Souza, K.","contributorId":84157,"corporation":false,"usgs":true,"family":"Souza","given":"K.","email":"","affiliations":[],"preferred":false,"id":426013,"contributorType":{"id":1,"text":"Authors"},"rank":14}]}} ,{"id":70030174,"text":"70030174 - 2007 - Probabilistic prediction models for aggregate quarry siting","interactions":[],"lastModifiedDate":"2012-03-12T17:21:01","indexId":"70030174","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2832,"text":"Natural Resources Research","onlineIssn":"1573-8981","printIssn":"1520-7439","active":true,"publicationSubtype":{"id":10}},"title":"Probabilistic prediction models for aggregate quarry siting","docAbstract":"Weights-of-evidence (WofE) and logistic regression techniques were used in a GIS framework to predict the spatial likelihood (prospectivity) of crushed-stone aggregate quarry development. The joint conditional probability models, based on geology, transportation network, and population density variables, were defined using quarry location and time of development data for the New England States, North Carolina, and South Carolina, USA. The Quarry Operation models describe the distribution of active aggregate quarries, independent of the date of opening. The New Quarry models describe the distribution of aggregate quarries when they open. Because of the small number of new quarries developed in the study areas during the last decade, independent New Quarry models have low parameter estimate reliability. The performance of parameter estimates derived for Quarry Operation models, defined by a larger number of active quarries in the study areas, were tested and evaluated to predict the spatial likelihood of new quarry development. Population density conditions at the time of new quarry development were used to modify the population density variable in the Quarry Operation models to apply to new quarry development sites. The Quarry Operation parameters derived for the New England study area, Carolina study area, and the combined New England and Carolina study areas were all similar in magnitude and relative strength. The Quarry Operation model parameters, using the modified population density variables, were found to be a good predictor of new quarry locations. Both the aggregate industry and the land management community can use the model approach to target areas for more detailed site evaluation for quarry location. The models can be revised easily to reflect actual or anticipated changes in transportation and population features. ?? International Association for Mathematical Geology 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Natural Resources Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s11053-007-9039-4","issn":"15207439","usgsCitation":"Robinson, G., and Larkins, P., 2007, Probabilistic prediction models for aggregate quarry siting: Natural Resources Research, v. 16, no. 2, p. 135-146, https://doi.org/10.1007/s11053-007-9039-4.","startPage":"135","endPage":"146","numberOfPages":"12","costCenters":[],"links":[{"id":211883,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s11053-007-9039-4"},{"id":239256,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-06-01","publicationStatus":"PW","scienceBaseUri":"505a8c97e4b0c8380cd7e793","contributors":{"authors":[{"text":"Robinson, G.R. Jr. 0000-0002-9676-9564","orcid":"https://orcid.org/0000-0002-9676-9564","contributorId":6444,"corporation":false,"usgs":true,"family":"Robinson","given":"G.R.","suffix":"Jr.","affiliations":[],"preferred":false,"id":426000,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Larkins, P.M.","contributorId":82527,"corporation":false,"usgs":true,"family":"Larkins","given":"P.M.","email":"","affiliations":[],"preferred":false,"id":426001,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70029742,"text":"70029742 - 2007 - Quantitative remote sensing study indicates doubling of coastal erosion rate in past 50 yr along a segment of the Arctic coast of Alaska","interactions":[],"lastModifiedDate":"2012-03-12T17:21:06","indexId":"70029742","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":"Quantitative remote sensing study indicates doubling of coastal erosion rate in past 50 yr along a segment of the Arctic coast of Alaska","docAbstract":"A new quantitative coastal land gained-and-lost method uses image analysis of topographic maps and Landsat thematic mapper short-wave infrared data to document accelerated coastal land loss and thermokarst lake expansion and drainage. The data span 1955-2005 along the Beaufort Sea coast north of Teshekpuk Lake in the National Petroleum Reserve in Alaska. Some areas have undergone as much as 0.9 km of coastal erosion in the past 50 yr. Land loss attributed to coastal erosion more than doubled, from 0.48 km2 yr-1 during 1955-1985 to 1.08 km2 yr-1 during 1985-2005. Coastal erosion has breached thermokarst lakes, causing initial draining of the lakes followed by marine floodng. Although inland thermokarst lakes show some uniform expansion, lakes breached by coastal erosion display lake expansion several orders of magnitude greater than inland lakes. ?? 2007 The Geological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/G23672A.1","issn":"00917613","usgsCitation":"Mars, J., and Houseknecht, D., 2007, Quantitative remote sensing study indicates doubling of coastal erosion rate in past 50 yr along a segment of the Arctic coast of Alaska: Geology, v. 35, no. 7, p. 583-586, https://doi.org/10.1130/G23672A.1.","startPage":"583","endPage":"586","numberOfPages":"4","costCenters":[],"links":[{"id":212917,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/G23672A.1"},{"id":240482,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"35","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a922fe4b0c8380cd806f4","contributors":{"authors":[{"text":"Mars, J.C.","contributorId":74833,"corporation":false,"usgs":true,"family":"Mars","given":"J.C.","affiliations":[],"preferred":false,"id":424090,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Houseknecht, D.W. 0000-0002-9633-6910","orcid":"https://orcid.org/0000-0002-9633-6910","contributorId":33695,"corporation":false,"usgs":true,"family":"Houseknecht","given":"D.W.","affiliations":[],"preferred":false,"id":424089,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70029740,"text":"70029740 - 2007 - Formation of mixed Al-Fe colloidal sorbent and dissolved-colloidal partitioning of Cu and Zn in the Cement Creek - Animas River Confluence, Silverton, Colorado","interactions":[],"lastModifiedDate":"2023-08-02T11:33:46.512511","indexId":"70029740","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":"Formation of mixed Al-Fe colloidal sorbent and dissolved-colloidal partitioning of Cu and Zn in the Cement Creek - Animas River Confluence, Silverton, Colorado","docAbstract":"

Transport and chemical transformations of dissolved and colloidal Al, Fe, Cu and Zn were studied by detailed sampling in the mixing zone downstream from the confluence of Cement Creek (pH 4.1) with the Animas River (pH 7.6). Complete mixing resulted in circumneutral pH in the downstream reach of the 1300 m study area. All four metals were transported through this mixing zone without significant losses to the streambed, and they exhibited transformations from dissolved to colloidal forms to varying degrees during the mixing process. Nearly all of the Al formed colloidal hydrous Al oxides (HAO) as pH increased (4.8–6.5), whereas colloidal hydrous Fe oxides (HFO) were supplied by Cement Creek as well as formed in the mixing zone primarily at higher pH (>6.5). The short travel time through the mixing zone (approx. 40 min) and pH limited the formation of HFO from dissolved Fe2+ supplied by Cement Creek. Although the proportions of HAO and HFO varied as the streams mixed, the colloidal sorbent typically was enriched in HAO relative to HFO by a factor of 1.5–2.1 (by mole) in the pH range where dissolved-to-colloidal partitioning of Cu and Zn was observed. Model simulations of sorption by HFO (alone) greatly underestimated the dissolved-to-colloidal partitioning of Zn. Previous studies have shown that HAO–HFO mixtures can sorb greater amounts of Zn than HFO alone, but the high Zn-to-sorbent ratio in this mixing zone could also account for greater partitioning. In contrast to Zn, comparisons with model simulations did not show that Cu sorption was greater than that for HFO alone, and also indicated that sorption was possibly less than what would be expected for a non-interactive mixture of these two sorbents. These field results for Cu, however, might be influenced by (organic) complexation or other factors in this natural system. Laboratory mixing experiments using natural source waters (upstream of the confluence) showed that the presence of HFO in the mixed sorbent resulted in greater Cu partitioning than for HAO alone, and that the effect was greater with increasing (mole fraction) HFO. This was consistent with field results that showed greater Cu sorption when additional HFO was formed in the downstream reach of the mixing zone. Further research is needed to identify the significance of surface-related mechanisms specific to HAO–HFO mixtures that could affect the partitioning of Cu in natural systems.

","language":"English","publisher":"Elsevier","doi":"10.1016/j.apgeochem.2007.02.010","issn":"08832927","usgsCitation":"Schemel, L.E., Kimball, B.A., Runkel, R.L., and Cox, M., 2007, Formation of mixed Al-Fe colloidal sorbent and dissolved-colloidal partitioning of Cu and Zn in the Cement Creek - Animas River Confluence, Silverton, Colorado: Applied Geochemistry, v. 22, no. 7, p. 1467-1484, https://doi.org/10.1016/j.apgeochem.2007.02.010.","productDescription":"18 p.","startPage":"1467","endPage":"1484","numberOfPages":"18","costCenters":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240480,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Colorado","city":"Silverton","otherGeospatial":"Cement Creek-Animus River Confluence","volume":"22","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1353e4b0c8380cd545fd","contributors":{"authors":[{"text":"Schemel, Laurence E. lschemel@usgs.gov","contributorId":4085,"corporation":false,"usgs":true,"family":"Schemel","given":"Laurence","email":"lschemel@usgs.gov","middleInitial":"E.","affiliations":[],"preferred":true,"id":424082,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kimball, Briant A. bkimball@usgs.gov","contributorId":533,"corporation":false,"usgs":true,"family":"Kimball","given":"Briant","email":"bkimball@usgs.gov","middleInitial":"A.","affiliations":[{"id":610,"text":"Utah Water Science Center","active":true,"usgs":true}],"preferred":true,"id":424081,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Runkel, Robert L. 0000-0003-3220-481X runkel@usgs.gov","orcid":"https://orcid.org/0000-0003-3220-481X","contributorId":685,"corporation":false,"usgs":true,"family":"Runkel","given":"Robert","email":"runkel@usgs.gov","middleInitial":"L.","affiliations":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true}],"preferred":true,"id":424083,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cox, Marisa H.","contributorId":91428,"corporation":false,"usgs":true,"family":"Cox","given":"Marisa H.","affiliations":[],"preferred":false,"id":424080,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ]}