{"pageNumber":"2214","pageRowStart":"55325","pageSize":"25","recordCount":184617,"records":[{"id":70035230,"text":"70035230 - 2008 - Paleobiogeographic affinities of emsian (late early devonian) gastropods from farewell terrane (west-central Alaska)","interactions":[],"lastModifiedDate":"2012-03-12T17:21:54","indexId":"70035230","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3459,"text":"Special Paper of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Paleobiogeographic affinities of emsian (late early devonian) gastropods from farewell terrane (west-central Alaska)","docAbstract":"The vast majority of Emsian gastropods from Limestone Mountain, Medfra B-4 quadrangle, west-central Alaska (Farewell terrane) belong to species with lecithotrophic larval strategy. The present data show that there is no significant difference in the paleobiogeo-graphic distribution of Emsian gastropod genera with lecithotrophic and planktotrophic larval strategies. Numerical analysis of the faunal affinities of the Emsian gastropod fauna from the Farewell terrane reveals that this terrane has much stronger faunal connections to regions like Variscan Europe, eastern Australia, and the Alexander terrane of southeast Alaska than to cratonic North America (Laurentia). The Canadian Arctic Islands is the only region of cratonic North America (Laurentia) that shows significant faunal affinities to the Emsian gastropod faunas of the Farewell terrane. The analysis also indicates a close faunal link between the Farewell and Alexander terranes. Published paleontological and geological data suggest that the Farewell and Alexander terranes represents tectonic entities that have been rifted away from the Siberia, Baltica, or the paleo-Pacific margin of Australia. The results of the present numerical analysis are not in conflict with any of these possibilities. However, the principle of spatial continuity of the wandering path prefers Siberia as the most probable \"parental\" paleocontinent for the derivation of both the Farewell and Alexander terranes. ?? 2008 The Geological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Special Paper of the Geological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/2008.442(07)","issn":"00721077","usgsCitation":"Fryda, J., and Blodgett, R.B., 2008, Paleobiogeographic affinities of emsian (late early devonian) gastropods from farewell terrane (west-central Alaska): Special Paper of the Geological Society of America, no. 442, p. 107-120, https://doi.org/10.1130/2008.442(07).","startPage":"107","endPage":"120","numberOfPages":"14","costCenters":[],"links":[{"id":242932,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":215154,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/2008.442(07)"}],"issue":"442","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a73b0e4b0c8380cd771b1","contributors":{"authors":[{"text":"Fryda, J.","contributorId":105140,"corporation":false,"usgs":true,"family":"Fryda","given":"J.","email":"","affiliations":[],"preferred":false,"id":449831,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Blodgett, R. B.","contributorId":25176,"corporation":false,"usgs":true,"family":"Blodgett","given":"R.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":449830,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70035227,"text":"70035227 - 2008 - New opportunities for international cooperation in land imaging: The U.S. national land imaging program initiative","interactions":[],"lastModifiedDate":"2012-03-12T17:21:55","indexId":"70035227","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"New opportunities for international cooperation in land imaging: The U.S. national land imaging program initiative","docAbstract":"[No abstract available]","largerWorkTitle":"International Astronautical Federation - 59th International Astronautical Congress 2008, IAC 2008","conferenceTitle":"59th International Astronautical Congress 2008, IAC 2008","conferenceDate":"29 September 2008 through 3 October 2008","conferenceLocation":"Glasgow","language":"English","isbn":"9781615671601","usgsCitation":"Stryker, T., 2008, New opportunities for international cooperation in land imaging: The U.S. national land imaging program initiative, in International Astronautical Federation - 59th International Astronautical Congress 2008, IAC 2008, v. 4, Glasgow, 29 September 2008 through 3 October 2008, p. 2522-2528.","startPage":"2522","endPage":"2528","numberOfPages":"7","costCenters":[],"links":[{"id":242867,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a65f4e4b0c8380cd72cb3","contributors":{"authors":[{"text":"Stryker, T.","contributorId":33935,"corporation":false,"usgs":true,"family":"Stryker","given":"T.","email":"","affiliations":[],"preferred":false,"id":449821,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70035226,"text":"70035226 - 2008 - Stratigraphic evidence for the role of lake spillover in the inception of the lower Colorado River in southern Nevada and western Arizona","interactions":[],"lastModifiedDate":"2012-03-12T17:21:55","indexId":"70035226","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Stratigraphic evidence for the role of lake spillover in the inception of the lower Colorado River in southern Nevada and western Arizona","docAbstract":"Late Miocene and early Pliocene sediments exposed along the lower Colorado River near Laughlin, Nevada, contain evidence that establishment of this reach of the river after 5.6 Ma involved flooding from lake spillover through a bedrock divide between Cottonwood Valley to the north and Mohave Valley to the south. Lacustrine marls interfingered with and conformably overlying a sequence of post-5.6 Ma finegrained valley-fill deposits record an early phase of intermittent lacustrine inundation restricted to Cottonwood Valley. Limestone, mud, sand, and minor gravel of the Bouse Formation were subsequently deposited above an unconformity. At the north end of Mohave Valley, a coarse-grained, lithologically distinct fluvial conglomerate separates subaerial, locally derived fan deposits from subaqueous deposits of the Bouse Formation. We interpret this key unit as evidence for overtopping and catastrophic breaching of the paleodivide immediately before deep lacustrine inundation of both valleys. Exposures in both valleys reveal a substantial erosional unconformity that records drainage of the lake and predates the arrival of sediment of the through-going Colorado River. Subsequent river aggradation culminated in the Pliocene between 4.1 and 3.3 Ma. The stratigraphic associations and timing of this drainage transition are consistent with geochemical evidence linking lacustrine conditions to the early Colorado River, the timings of drainage integration and canyon incision on the Colorado Plateau, the arrival of Colorado River sand at its terminus in the Salton Trough, and a downstream-directed mode of river integration common in areas of crustal extension. ?? 2008 The Geological Society of America.","largerWorkTitle":"Special Paper of the Geological Society of America","language":"English","doi":"10.1130/2008.2439(15)","issn":"00721077","usgsCitation":"House, P., Pearthree, P., and Perkins, M.E., 2008, Stratigraphic evidence for the role of lake spillover in the inception of the lower Colorado River in southern Nevada and western Arizona, in Special Paper of the Geological Society of America, no. 439, p. 335-353, https://doi.org/10.1130/2008.2439(15).","startPage":"335","endPage":"353","numberOfPages":"19","costCenters":[],"links":[{"id":215093,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/2008.2439(15)"},{"id":242866,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"439","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b98f6e4b08c986b31c1a1","contributors":{"authors":[{"text":"House, P.K.","contributorId":25755,"corporation":false,"usgs":true,"family":"House","given":"P.K.","email":"","affiliations":[],"preferred":false,"id":449818,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pearthree, P. A.","contributorId":77236,"corporation":false,"usgs":false,"family":"Pearthree","given":"P. A.","affiliations":[],"preferred":false,"id":449819,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Perkins, M. E.","contributorId":92707,"corporation":false,"usgs":true,"family":"Perkins","given":"M.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":449820,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70035218,"text":"70035218 - 2008 - Significance of detrital zircons in upper Devonian ocean-basin strata of the Sonora allochthon and Lower Permian synorogenic strata of the Mina Mexico foredeep, central Sonora, Mexico","interactions":[],"lastModifiedDate":"2012-03-12T17:21:57","indexId":"70035218","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3459,"text":"Special Paper of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Significance of detrital zircons in upper Devonian ocean-basin strata of the Sonora allochthon and Lower Permian synorogenic strata of the Mina Mexico foredeep, central Sonora, Mexico","docAbstract":"U-Pb isotopic dating of detrital zircons from a conglomeratic barite sandstone in the Sonora allochthon and a calciclastic sandstone in the Mina Mexico foredeep of the Minas de Barita area reveals two main age groups in the Upper Devonian part of the Los Pozos Formation, 1.73-1.65 Ga and 1.44-1.42 Ga; and three main age groups in the Lower Permian part of the Mina Mexico Formation, 1.93-1.91 Ga, 1.45-1.42 Ga, and 1.1-1.0 Ga. Small numbers of zircons with ages of 2.72-2.65 Ga, 1.30-1.24 Ga, ca. 2.46 Ga, ca. 1.83 Ga, and ca. 0.53 Ga are also present in the Los Pozos sandstone. Detrital zircons ranging in age from 1.73 to 1.65 Ga are considered to have been derived from the Yavapai, Mojave, and Mazatzal Provinces and their transition zones of the southwestern United States and northwestern Mexico. The 1.45-1.30 Ga detrital zircons were probably derived from scattered granite bodies within the Mojave and Mazatzal basement rocks in the southwestern United States and northwestern Mexico, and possibly from the Southern and Eastern Granite-Rhyolite Provinces of the southern United States. The 1.24-1.0 Ga detrital zircons are believed to have been derived from the Grenville (Llano) Province to the east and northeast or from Grenvilleage intrusions or anatectites to the north. Several detrital zircon ages ranging from 2.72 to 1.91 Ga were probably derived originally from the Archean Wyoming Province and Early Paleoproterozoic rocks of the Lake Superior region. These older detrital zircons most likely have been recycled one or more times into the Paleozoic sandstones of central Sonora. The 0.53 Ga zircon is believed to have been derived from a Lower Cambrian granitoid or meta-morphic rock northeast of central Sonora, possibly in New Mexico and Colorado, or Oklahoma. Detrital zircon geochronology suggests that most of the detritus in both samples was derived from Laurentia to the north, whereas some detritus in the Permian synorogenic foredeep sequence was derived from the evolving accretionary wedge to the south. Compositional and sedimentological differences between the continental-rise Los Pozos conglomeratic barite sandstone and the foredeep Mina Mexico calciclastic sandstone imply different depositional and tectonic settings. ?? 2008 The Geological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Special Paper of the Geological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/2008.442(08)","issn":"00721077","usgsCitation":"Poole, F.G., Gehrels, G.E., and Stewart, J., 2008, Significance of detrital zircons in upper Devonian ocean-basin strata of the Sonora allochthon and Lower Permian synorogenic strata of the Mina Mexico foredeep, central Sonora, Mexico: Special Paper of the Geological Society of America, no. 442, p. 121-131, https://doi.org/10.1130/2008.442(08).","startPage":"121","endPage":"131","numberOfPages":"11","costCenters":[],"links":[{"id":215487,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/2008.442(08)"},{"id":243295,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"442","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8f15e4b08c986b318cff","contributors":{"authors":[{"text":"Poole, F. G. 0000-0001-8487-0799","orcid":"https://orcid.org/0000-0001-8487-0799","contributorId":104883,"corporation":false,"usgs":true,"family":"Poole","given":"F.","email":"","middleInitial":"G.","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":449778,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gehrels, G. E.","contributorId":9660,"corporation":false,"usgs":true,"family":"Gehrels","given":"G.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":449776,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Stewart, John H.","contributorId":14383,"corporation":false,"usgs":true,"family":"Stewart","given":"John H.","affiliations":[],"preferred":false,"id":449777,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70034485,"text":"70034485 - 2008 - Holocene vertical displacement on the central segments of the Wasatch fault zone, Utah","interactions":[],"lastModifiedDate":"2012-03-12T17:21:43","indexId":"70034485","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"title":"Holocene vertical displacement on the central segments of the Wasatch fault zone, Utah","docAbstract":"Compiled per-event vertical-displacement observations from 17 paleoseismic sites along the six central segments of the Wasatch fault zone (WFZ) highlight possible biases and trends in displacement along the fault. The displacement data are consistent with a model of characteristic-type slip, but anomalous and variable displacements indicate that significant natural variability in displacement occurs. When combined into a composite distribution of displacement, 79% of the data fit within a displacement envelope that shows displacement decreasing in a half-ellipse shape from 1.4-3.5 m near the segment centers to 0.6-2.5 m near the ends. Additionally, displacements normalized by the distance from the segment centers to ends decrease from means of 2.0-3.0 m near the segment centers to 1.3-1.9 m near the ends, consistent with characteristic-type slip termination. Although several paleoseismic sites exhibit repeated, similar displacements, the data are sparse and both low-valued (0.5-0.8 m) and high-valued (4.2-4.7 m) outliers suggest complex strain release, possibly resulting from segment interaction and/or noncharacteristic events. Although a global, normal-fault-type surface-rupture-length (SRL) average-displacement regression underpredicts observed WFZ displacements, the largest displacements per segment correspond well with a SRL maximum-displacement regression. This correlation, as well as moderate variability in SRL- and displacement-based moment magnitude, suggests that the anomalous displacements represent the intrinsic variability in characteristic displacement per segment. Thus, minor variations to the characteristic slip model to account for exceptional upper- and lower-bound displacements, e.g., a hybrid characteristic-variable slip model, may be appropriate for the WFZ. Additional paleoseismic data are necessary to address data gaps and biases, to facilitate more robust tests of earthquake-slip models, and to reduce uncertainty in SRL, displacement, and magnitude.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin of the Seismological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1785/0120080119","issn":"00371106","usgsCitation":"DuRoss, C., 2008, Holocene vertical displacement on the central segments of the Wasatch fault zone, Utah: Bulletin of the Seismological Society of America, v. 98, no. 6, p. 2918-2933, https://doi.org/10.1785/0120080119.","startPage":"2918","endPage":"2933","numberOfPages":"16","costCenters":[],"links":[{"id":215913,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1785/0120080119"},{"id":243749,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"98","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a31fce4b0c8380cd5e40a","contributors":{"authors":[{"text":"DuRoss, C. B.","contributorId":86003,"corporation":false,"usgs":true,"family":"DuRoss","given":"C. B.","affiliations":[],"preferred":false,"id":446038,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70179374,"text":"70179374 - 2008 - Estimates of fish-, spill-, and sluiceway-passage efficiencies of radio-tagged juvenile Chinook salmon during spring and summer at The Dalles Dam in 2004: Draft final report of research","interactions":[],"lastModifiedDate":"2016-12-29T14:37:23","indexId":"70179374","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":4,"text":"Other Government Series"},"title":"Estimates of fish-, spill-, and sluiceway-passage efficiencies of radio-tagged juvenile Chinook salmon during spring and summer at The Dalles Dam in 2004: Draft final report of research","docAbstract":"

n/a

","language":"English","publisher":"U.S. Army Corps of Engineers","usgsCitation":"Hansel, H., Juhnke, S., Haner, P., Dingmon, L., and Beeman, J., 2008, Estimates of fish-, spill-, and sluiceway-passage efficiencies of radio-tagged juvenile Chinook salmon during spring and summer at The Dalles Dam in 2004: Draft final report of research, 106 p.","productDescription":"106 p.","costCenters":[{"id":654,"text":"Western Fisheries Research Center","active":true,"usgs":true}],"links":[{"id":332651,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58662f18e4b0cd2dabe7c4cb","contributors":{"authors":[{"text":"Hansel, H.C.","contributorId":34624,"corporation":false,"usgs":true,"family":"Hansel","given":"H.C.","email":"","affiliations":[],"preferred":false,"id":656972,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Juhnke, S.D.","contributorId":177771,"corporation":false,"usgs":false,"family":"Juhnke","given":"S.D.","email":"","affiliations":[],"preferred":false,"id":656973,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Haner, P.V.","contributorId":63912,"corporation":false,"usgs":true,"family":"Haner","given":"P.V.","email":"","affiliations":[],"preferred":false,"id":656974,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dingmon, L.","contributorId":65286,"corporation":false,"usgs":true,"family":"Dingmon","given":"L.","email":"","affiliations":[],"preferred":false,"id":656975,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Beeman, J.W.","contributorId":32646,"corporation":false,"usgs":true,"family":"Beeman","given":"J.W.","email":"","affiliations":[],"preferred":false,"id":656976,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70179363,"text":"70179363 - 2008 - Differences in subyearling fall Chinook salmon migratory behavior in the Snake and Clearwater rivers. Annual report 2006","interactions":[],"lastModifiedDate":"2016-12-29T12:57:08","indexId":"70179363","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":4,"text":"Other Government Series"},"title":"Differences in subyearling fall Chinook salmon migratory behavior in the Snake and Clearwater rivers. Annual report 2006","docAbstract":"

n/a

","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Effects of summer flow augmentation on the migratroy behavior and survival of juvenile Snake River fall Chinook salmon","language":"English","publisher":"Bonneville Power Administration","usgsCitation":"Tiffan, K., 2008, Differences in subyearling fall Chinook salmon migratory behavior in the Snake and Clearwater rivers. Annual report 2006, 17 p. .","productDescription":"17 p. ","startPage":"68","endPage":"84","costCenters":[{"id":654,"text":"Western Fisheries Research Center","active":true,"usgs":true}],"links":[{"id":332643,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58662f1ae4b0cd2dabe7c4cf","contributors":{"authors":[{"text":"Tiffan, K.F.","contributorId":19327,"corporation":false,"usgs":true,"family":"Tiffan","given":"K.F.","email":"","affiliations":[{"id":654,"text":"Western Fisheries Research Center","active":true,"usgs":true}],"preferred":false,"id":656916,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70179358,"text":"70179358 - 2008 - Lower Methow tributaries intensive effectiveness monitoring study. Interim report","interactions":[],"lastModifiedDate":"2016-12-29T12:47:59","indexId":"70179358","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":6,"text":"USGS Unnumbered Series"},"title":"Lower Methow tributaries intensive effectiveness monitoring study. Interim report","docAbstract":"

Actions have been taken to replace diversion dams in lower Beaver Creek with a series of rock vortex weirs. Some of these diversion dams have been in place for over 100 years, and they have impaired or completely blocked upstream migration of fish. Three diversion dams were replaced in 2003 (Lower Stokes, Thurlow Transfer, and Upper Stokes), and a forth diversion dam was replaced in 2004 (Fort-Thurlow). These vortex weirs were designed and installed under the supervision of U.S. Bureau of Reclamation (BOR) engineers and completed in accordance to National Marine Fisheries Service (NMFS) and Washington Department of Fisheries and Wildlife (WDFW) fish passage criteria. The projects were designed to meet fish species recovery needs described by the Endangered Species Act (ESA) and the “BiOp” issued by NMFS (2000a). Since no specific guidelines have been identified to date specifically addressing diversion dams, WDFW and NMFS guidelines are being considered as the target design and performance criteria for the sites monitored as part of this project. Where used, the vortex weirs were designed to maintain irrigation diversion capabilities while improving fish passage.

","language":"English","publisher":"U.S Geological Survey","doi":"10.3133/70179358","usgsCitation":"Martens, K.D., and Connolly, P., 2008, Lower Methow tributaries intensive effectiveness monitoring study. Interim report, 77 p. , https://doi.org/10.3133/70179358.","productDescription":"77 p. 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Annual report 2004-2005","interactions":[],"lastModifiedDate":"2016-12-29T12:38:49","indexId":"70179355","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":4,"text":"Other Government Series"},"title":"Patterns of larval catostomid emigration from the Sprague and lower Williamson rivers of the Upper Klamath Basin, Oregon, prior to the removal of Chiloquin Dam. Annual report 2004-2005","language":"English","publisher":"U.S. Bureau of Reclamation","usgsCitation":"Ellsworth, C., Tyler, T., VanderKooi, S.P., and Markle, D., 2008, Patterns of larval catostomid emigration from the Sprague and lower Williamson rivers of the Upper Klamath Basin, Oregon, prior to the removal of Chiloquin Dam. 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Sea otters (Enhydra lutris) have been reported to become infected with Toxoplasma gondiiand at times succumb to clinical disease. Here, we determined genotypes of 39 T. gondiiisolates from 37 sea otters in two geographically distant locations (25 from California and 12 from Washington). Six genotypes were identified using 10 PCR-RFLP genetic markers including SAG1, SAG2, SAG3, BTUB, GRA6, c22-8, c29-2, L358, PK1, and Apico, and by DNA sequencing of loci SAG1 and GRA6 in 13 isolates. Of these 39 isolates, 13 (33%) were clonal Type II which can be further divided into two groups at the locus Apico. Two of the 39 isolates had Type II alleles at all loci except a Type I allele at locus L358. One isolate had Type II alleles at all loci except the Type I alleles at loci L358 and Apico. One isolate had Type III alleles at all loci except Type II alleles at SAG2 and Apico. Two sea otter isolates had a mixed infection. Twenty-one (54%) isolates had an unique allele at SAG1 locus. Further genotyping or DNA sequence analysis for 18 of these 21 isolates at loci SAG1 and GRA6 revealed that there were two different genotypes, including the previously identified Type X (four isolates) and a new genotype named Type A (14 isolates). The results from this study suggest that the sea otter isolates are genetically diverse.

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\"}}]}","volume":"151","issue":"2-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b20e4b07f02db6abafe","contributors":{"authors":[{"text":"Sundar, N.","contributorId":80640,"corporation":false,"usgs":true,"family":"Sundar","given":"N.","email":"","affiliations":[],"preferred":false,"id":315146,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cole, Rebecca A. 0000-0003-2923-1622 rcole@usgs.gov","orcid":"https://orcid.org/0000-0003-2923-1622","contributorId":2873,"corporation":false,"usgs":true,"family":"Cole","given":"Rebecca","email":"rcole@usgs.gov","middleInitial":"A.","affiliations":[{"id":456,"text":"National Wildlife Health Center","active":true,"usgs":true}],"preferred":true,"id":315143,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Thomas, N. J. 0000-0002-0161-0391","orcid":"https://orcid.org/0000-0002-0161-0391","contributorId":49731,"corporation":false,"usgs":true,"family":"Thomas","given":"N. J.","affiliations":[],"preferred":false,"id":315144,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Majumdar, D.","contributorId":10017,"corporation":false,"usgs":true,"family":"Majumdar","given":"D.","email":"","affiliations":[],"preferred":false,"id":315141,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Dubey, J. P.","contributorId":80609,"corporation":false,"usgs":false,"family":"Dubey","given":"J. P.","affiliations":[],"preferred":false,"id":315145,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Su, C.","contributorId":18334,"corporation":false,"usgs":false,"family":"Su","given":"C.","email":"","affiliations":[],"preferred":false,"id":315142,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70182242,"text":"70182242 - 2008 - Mathematical models frame environmental dispute [Review of the article Useless arithmetic: Ten points to ponder when using mathematical models in environmental decision making]","interactions":[],"lastModifiedDate":"2017-02-22T09:39:21","indexId":"70182242","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":5301,"text":"Public Administration Review","active":true,"publicationSubtype":{"id":10}},"title":"Mathematical models frame environmental dispute [Review of the article Useless arithmetic: Ten points to ponder when using mathematical models in environmental decision making]","docAbstract":"

When Linda Pilkey- Jarvis and Orrin Pilkey state in their article, \"Useless Arithmetic,\" that \"mathematical models are simplified, generalized representations of a process or system,\" they probably do not mean to imply that these models are simple. Rather, the models are simpler than nature and that is the heart of the problem with predictive models. We have had a long professional association with the developers and users of one of these simplifications of nature in the form of a mathematical model known as Physical Habitat Simulation (PHABSIM), which is part of the Instream Flow Incremental Methodology (IFIM). The IFIM is a suite of techniques, including PHABSIM, that allows the analyst to incorporate hydrology , hydraulics, habitat, water quality, stream temperature, and other variables into a tradeoff analysis that decision makers can use to design a flow regime to meet management objectives (Stalnaker et al. 1995). Although we are not the developers of the IFIM, we have worked with those who did design it, and we have tried to understand how the IFIM and PHABSIM are actually used in decision making (King, Burkardt, and Clark 2006; Lamb 1989).

","language":"English","publisher":"American Society for Public Administration","usgsCitation":"Lamb, B.L., and Burkardt, N., 2008, Mathematical models frame environmental dispute [Review of the article Useless arithmetic: Ten points to ponder when using mathematical models in environmental decision making]: Public Administration Review, v. 68, no. 3, p. 55-60.","productDescription":"6 p.","startPage":"55","endPage":"60","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":335913,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"68","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58aeb13de4b01ccd54f9ee22","contributors":{"authors":[{"text":"Lamb, Berton Lee","contributorId":96784,"corporation":false,"usgs":true,"family":"Lamb","given":"Berton","email":"","middleInitial":"Lee","affiliations":[],"preferred":false,"id":670197,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Burkardt, Nina 0000-0002-9392-9251 burkardtn@usgs.gov","orcid":"https://orcid.org/0000-0002-9392-9251","contributorId":2781,"corporation":false,"usgs":true,"family":"Burkardt","given":"Nina","email":"burkardtn@usgs.gov","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":670198,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70193772,"text":"70193772 - 2008 - Characterizing submarine ground‐water discharge using fiber‐optic distributed temperature sensing and marine electrical resistivity","interactions":[],"lastModifiedDate":"2019-10-21T11:44:05","indexId":"70193772","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Characterizing submarine ground‐water discharge using fiber‐optic distributed temperature sensing and marine electrical resistivity","docAbstract":"

Submarine ground‐water discharge (SGD) contributes important solute fluxes to coastal waters. Pollutants are transported to coastal ecosystems by SGD at spatially and temporally variable rates. New approaches are needed to characterize the effects of storm‐event, tidal, and seasonal forcing on SGD. Here, we evaluate the utility of two geophysical methods‐fiber‐optic distributed temperature sensing (FO‐DTS) and marine electrical resistivity (MER)—for observing the spatial and temporal variations in SGD and the configuration of the freshwater/saltwater interface within submarine sediments. FO‐DTS and MER cables were permanently installed into the estuary floor on a transect extending 50 meters offshore under Waquoit Bay, Massachusetts, at the Waquoit Bay National Estuarine Research Reserve, and nearly continuous data were collected for 4 weeks in summer 2007. Initial results indicate that the methods are extremely useful for monitoring changes in the complex estuarine environment. The FO‐DTS produced time‐series data at approximately 1‐meter increments along the length of the fiber at approximately 29‐second intervals. The temperature time‐series data show that the temperature at near‐shore locations appears to be dominated by a semi‐diurnal (tidal) signal, whereas the temperature at off‐shore locations is dominated by a diurnal signal (day/night heating and cooling). Dipole‐dipole MER surveys were completed about every 50 minutes, allowing for production of high‐resolution time‐lapse tomograms, which provide insight into the variations of the subsurface freshwater/saltwater interface. Preliminary results from the MER data show a high‐resistivity zone near the shore at low tide, indicative of SGD, and consistent with the FO‐DTS results.

","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Symposium on the Application of Geophysics to Engineering and Environmental Problems 2008","largerWorkSubtype":{"id":12,"text":"Conference publication"},"language":"English","publisher":"Society of Exploration Geophysicists","doi":"10.4133/1.2963319","usgsCitation":"Henderson, R., Day-Lewis, F.D., Lane, J.W., Harvey, C.F., and Liu, L., 2008, Characterizing submarine ground‐water discharge using fiber‐optic distributed temperature sensing and marine electrical resistivity, in Symposium on the Application of Geophysics to Engineering and Environmental Problems 2008, p. 775-785, https://doi.org/10.4133/1.2963319.","productDescription":"11 p.","startPage":"775","endPage":"785","ipdsId":"IP-003962","costCenters":[{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true},{"id":493,"text":"Office of Ground Water","active":true,"usgs":true}],"links":[{"id":476701,"rank":0,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.495.9270","text":"External Repository"},{"id":350802,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"publishingServiceCenter":{"id":11,"text":"Pembroke PSC"},"noUsgsAuthors":false,"publicationDate":"2008-09-30","publicationStatus":"PW","scienceBaseUri":"5a719271e4b0a9a2e9dbde30","contributors":{"authors":[{"text":"Henderson, Rory rhenders@usgs.gov","contributorId":2083,"corporation":false,"usgs":true,"family":"Henderson","given":"Rory","email":"rhenders@usgs.gov","affiliations":[{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true}],"preferred":false,"id":720341,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Day-Lewis, Frederick D. 0000-0003-3526-886X daylewis@usgs.gov","orcid":"https://orcid.org/0000-0003-3526-886X","contributorId":1672,"corporation":false,"usgs":true,"family":"Day-Lewis","given":"Frederick","email":"daylewis@usgs.gov","middleInitial":"D.","affiliations":[{"id":493,"text":"Office of Ground Water","active":true,"usgs":true},{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true}],"preferred":true,"id":720339,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lane, John W. Jr. 0000-0002-3558-243X jwlane@usgs.gov","orcid":"https://orcid.org/0000-0002-3558-243X","contributorId":189168,"corporation":false,"usgs":true,"family":"Lane","given":"John","suffix":"Jr.","email":"jwlane@usgs.gov","middleInitial":"W.","affiliations":[{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true},{"id":493,"text":"Office of Ground Water","active":true,"usgs":true}],"preferred":false,"id":720340,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Harvey, Charles F.","contributorId":199836,"corporation":false,"usgs":false,"family":"Harvey","given":"Charles","email":"","middleInitial":"F.","affiliations":[{"id":12444,"text":"Massachusetts Institute of Technology","active":true,"usgs":false}],"preferred":false,"id":720342,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Liu, Lanbo","contributorId":199850,"corporation":false,"usgs":false,"family":"Liu","given":"Lanbo","email":"","affiliations":[{"id":6619,"text":"University of Connecticutt","active":true,"usgs":false}],"preferred":false,"id":720343,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70193770,"text":"70193770 - 2008 - Levee evaluation using MASW: Preliminary findings from the Citrus Lakefront Levee, New Orleans, Louisiana","interactions":[],"lastModifiedDate":"2019-10-21T11:54:01","indexId":"70193770","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Levee evaluation using MASW: Preliminary findings from the Citrus Lakefront Levee, New Orleans, Louisiana","docAbstract":"

The utility of the multi‐channel analysis of surface waves (MASW) seismic method for non‐invasive assessment of earthen levees was evaluated for a section of the Citrus Lakefront Levee, New Orleans, Louisiana. This test was conducted after the New Orleans' area levee system had been stressed by Hurricane Katrina in 2005. The MASW data were acquired in a seismically noisy, urban environment using an accelerated weight‐drop seismic source and a towed seismic land streamer. Much of the seismic data were contaminated with higher‐order mode guided‐waves, requiring application of muting filtering techniques to improve interpretability of the dispersion curves. Comparison of shear‐wave velocity sections with boring logs suggests the existence of four distinct horizontal layers within and beneath the levee: (1) the levee core, (2) the levee basal layer of fat clay, (3) a sublevel layer of silty sand, and (4) underlying Pleistocene deposits of sandy lean clay. Along the surveyed section of levee, lateral variations in shear‐wave velocity are interpreted as changes in material rigidity, suggestive of construction or geologic heterogeneity, or possibly, that dynamic processes (such as differential settlement) are affecting discrete levee areas. The results of this study suggest that the MASW method is a geophysical tool with significant potential for non‐invasive characterization of vertical and horizontal variations in levee material shear strength. Additional work, however, is needed to fully understand and address the complex seismic wave propagation in levee structures.

","largerWorkType":{"id":4,"text":"Book"},"largerWorkSubtype":{"id":12,"text":"Conference publication"},"language":"English","publisher":"Society of Exploration Geophysicists","publisherLocation":"Symposium on the Application of Geophysics to Engineering and Environmental Problems 2008","doi":"10.4133/1.2963312","usgsCitation":"Lane, J.W., Ivanov, J.M., Day-Lewis, F.D., Clemens, D., Patev, R., and Miller, R.D., 2008, Levee evaluation using MASW: Preliminary findings from the Citrus Lakefront Levee, New Orleans, Louisiana, p. 703-712, https://doi.org/10.4133/1.2963312.","productDescription":"10 p.","startPage":"703","endPage":"712","ipdsId":"IP-003947","costCenters":[{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true},{"id":493,"text":"Office of Ground Water","active":true,"usgs":true}],"links":[{"id":350804,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Louisiana","city":"New Orleans","otherGeospatial":"Citrus Lakefront Levee","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -90.2801513671875,\n 29.864465259258\n ],\n [\n -89.93682861328125,\n 29.864465259258\n ],\n [\n -89.93682861328125,\n 30.0405664305846\n ],\n [\n -90.2801513671875,\n 30.0405664305846\n ],\n [\n -90.2801513671875,\n 29.864465259258\n ]\n ]\n ]\n }\n }\n ]\n}","publishingServiceCenter":{"id":11,"text":"Pembroke PSC"},"noUsgsAuthors":false,"publicationDate":"2008-09-30","publicationStatus":"PW","scienceBaseUri":"5a719272e4b0a9a2e9dbde36","contributors":{"authors":[{"text":"Lane, John W. Jr. 0000-0002-3558-243X jwlane@usgs.gov","orcid":"https://orcid.org/0000-0002-3558-243X","contributorId":189168,"corporation":false,"usgs":true,"family":"Lane","given":"John","suffix":"Jr.","email":"jwlane@usgs.gov","middleInitial":"W.","affiliations":[{"id":493,"text":"Office of Ground Water","active":true,"usgs":true},{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true}],"preferred":false,"id":720330,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ivanov, Julian M.","contributorId":80844,"corporation":false,"usgs":true,"family":"Ivanov","given":"Julian","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":720332,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Day-Lewis, Frederick D. 0000-0003-3526-886X daylewis@usgs.gov","orcid":"https://orcid.org/0000-0003-3526-886X","contributorId":1672,"corporation":false,"usgs":true,"family":"Day-Lewis","given":"Frederick","email":"daylewis@usgs.gov","middleInitial":"D.","affiliations":[{"id":493,"text":"Office of Ground Water","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true}],"preferred":true,"id":720329,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Clemens, Drew","contributorId":199902,"corporation":false,"usgs":false,"family":"Clemens","given":"Drew","email":"","affiliations":[],"preferred":false,"id":720331,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Patev, Robert","contributorId":199912,"corporation":false,"usgs":false,"family":"Patev","given":"Robert","email":"","affiliations":[],"preferred":false,"id":720334,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Miller, Richard D.","contributorId":56406,"corporation":false,"usgs":false,"family":"Miller","given":"Richard","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":720333,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":1016474,"text":"1016474 - 2008 - Organochlorine pesticide, polychlorinated biphenyl, trace element and metal residues in bird eggs from Salton Sea, California, 2004","interactions":[],"lastModifiedDate":"2012-02-02T00:04:52","indexId":"1016474","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"title":"Organochlorine pesticide, polychlorinated biphenyl, trace element and metal residues in bird eggs from Salton Sea, California, 2004","docAbstract":"The Salton Sea is a highly eutrophic, hypersaline terminal lake that receives inflows primarily from agricultural drainages in the Imperial and Coachella valleys. Impending reductions in water inflow at Salton Sea may concentrate existing contaminants which have been a concern for many years, and result in higher exposure to birds. Thus, waterbird eggs were collected and analyzed in 2004 and compared with residue concentrations from earlier years; these data provide a base for future comparisons. Eggs from four waterbird species (black-crowned night-heron [Nycticorax nycticorax], great egret [Ardea alba], black-necked stilt [Himantopus mexicanus], and American avocet [Recurvirostra Americana]) were collected. Eggs were analyzed for organochlorine pesticides, polychlorinated biphenyls (PCBs), metals, and trace elements, with current results compared to those reported for eggs collected from the same species and others during 1985a??1993. The two contaminants of primary concern were p,pa??-DDE (DDE) and selenium. DDE concentrations in night-heron and great egret eggs collected from the northwest corner of Salton Sea (Whitewater River delta) decreased 91 and 95%, respectively, by 2004, with a concomitant increase in eggshell thickness for both species. Decreases in bird egg DDE levels paralleled those in tissues of tilapia (Oreochromis mossambicus ?? O. urolepis), an important prey species for herons and egrets. Despite most nests of night-herons and great egrets failing in 2004 due to predation, predicted reproductive effects based on DDE concentrations in eggs were low or negligible for these species. The 2004 DDE findings were in dramatic contrast to those in the past decade, and included an 81% decrease in black-necked stilt eggs, although concentrations were lower historically than those reported in night-herons and egrets. Selenium concentrations in black-necked stilt eggs from the southeast corner of Salton Sea (Davis Road) were similar in 1993 and 2004, with 4.5a??7.6% of the clutches estimated to be selenium impaired during both time periods. Because of present selenium concentrations and future reduced water inflow, the stilt population is of special concern. Between 1992 and 1993 and 2004 selenium in night-heron and great egret eggs from the Whitewater River delta at the north end of the Sea decreased by 81 and 55%, respectively. None of the night-heron or egret eggs collected in 2004 contained selenium concentrations above the lowest reported effect concentration (6.0 I?g/g dw). Reasons for selenium decreases in night-heron and egret eggs are unknown. Other contaminants evaluated in 2004 were all below known effect concentrations. However, in spite of generally low contaminant levels in 2004, the nesting populations of night-herons and great egrets at Salton Sea were greatly reduced from earlier years and snowy egrets (Egretta thula) were not found nesting. Other factors that include predation, reduced water level, diminished roost and nest sites, increased salinity, eutrophication, and reduced fish populations can certainly influence avian populations. Future monitoring, to validate predicted responses by birds, other organisms, and contaminant loadings associated with reduced water inflows, together with adaptive management should be the operational framework at the Salton Sea.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrobiologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Henny, C.J., Anderson, T.W., and Crayon, J., 2008, Organochlorine pesticide, polychlorinated biphenyl, trace element and metal residues in bird eggs from Salton Sea, California, 2004: Hydrobiologia, v. 604, no. 1, p. 137-149.","productDescription":"p.137-149","startPage":"137","endPage":"149","numberOfPages":"13","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":134983,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"604","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ae5e4b07f02db68aa19","contributors":{"authors":[{"text":"Henny, Charles J. 0000-0001-7474-350X hennyc@usgs.gov","orcid":"https://orcid.org/0000-0001-7474-350X","contributorId":3461,"corporation":false,"usgs":true,"family":"Henny","given":"Charles","email":"hennyc@usgs.gov","middleInitial":"J.","affiliations":[{"id":289,"text":"Forest and Rangeland Ecosys Science Center","active":true,"usgs":true}],"preferred":true,"id":324280,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Anderson, T. W.","contributorId":105686,"corporation":false,"usgs":true,"family":"Anderson","given":"T.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":324282,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Crayon, J.J.","contributorId":91810,"corporation":false,"usgs":true,"family":"Crayon","given":"J.J.","affiliations":[],"preferred":false,"id":324281,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70193771,"text":"70193771 - 2008 - Estimation of bedrock depth using the horizontal‐to‐vertical (H/V) ambient‐noise seismic method","interactions":[],"lastModifiedDate":"2019-10-21T12:15:27","indexId":"70193771","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Estimation of bedrock depth using the horizontal‐to‐vertical (H/V) ambient‐noise seismic method","docAbstract":"

Estimating sediment thickness and the geometry of the bedrock surface is a key component of many hydrogeologic studies. The horizontal‐to‐vertical (H/V) ambient‐noise seismic method is a novel, non‐invasive technique that can be used to rapidly estimate the depth to bedrock. The H/V method uses a single, broad‐band three‐component seismometer to record ambient seismic noise. The ratio of the averaged horizontal‐to‐vertical frequency spectrum is used to determine the fundamental site resonance frequency, which can be interpreted using regression equations to estimate sediment thickness and depth to bedrock. The U.S. Geological Survey used the H/V seismic method during fall 2007 at 11 sites in Cape Cod, Massachusetts, and 13 sites in eastern Nebraska. In Cape Cod, H/V measurements were acquired along a 60‐kilometer (km) transect between Chatham and Provincetown, where glacial sediments overlie metamorphic rock. In Nebraska, H/V measurements were acquired along approximately 11‐ and 14‐km transects near Firth and Oakland, respectively, where glacial sediments overlie weathered sedimentary rock. The ambient‐noise seismic data from Cape Cod produced clear, easily identified resonance frequency peaks. The interpreted depth and geometry of the bedrock surface correlate well with boring data and previously published seismic refraction surveys. Conversely, the ambient‐noise seismic data from eastern Nebraska produced subtle resonance frequency peaks, and correlation of the interpreted bedrock surface with bedrock depths from borings is poor, which may indicate a low acoustic impedance contrast between the weathered sedimentary rock and overlying sediments and/or the effect of wind noise on the seismic records. Our results indicate the H/V ambient‐noise seismic method can be used effectively to estimate the depth to rock where there is a significant acoustic impedance contrast between the sediments and underlying rock. However, effective use of the method is challenging in the presence of gradational contacts such as gradational weathering or cementation. Further work is needed to optimize interpretation of resonance frequencies in the presence of extreme wind noise. In addition, local estimates of bedrock depth likely could be improved through development of regional or study‐area‐specific regression equations relating resonance frequency to bedrock depth.

","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Symposium on the Application of Geophysics to Engineering and Environmental Problems 2008","largerWorkSubtype":{"id":12,"text":"Conference publication"},"language":"English","publisher":"Society of Exploration Geophysicists","doi":"10.4133/1.2963289","usgsCitation":"Lane, J.W., White, E.A., Steele, G.V., and Cannia, J.C., 2008, Estimation of bedrock depth using the horizontal‐to‐vertical (H/V) ambient‐noise seismic method, in Symposium on the Application of Geophysics to Engineering and Environmental Problems 2008, p. 490-502, https://doi.org/10.4133/1.2963289.","productDescription":"13 p.","startPage":"490","endPage":"502","ipdsId":"IP-003887","costCenters":[{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true},{"id":493,"text":"Office of Ground Water","active":true,"usgs":true}],"links":[{"id":350806,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"publishingServiceCenter":{"id":11,"text":"Pembroke PSC"},"noUsgsAuthors":false,"publicationDate":"2008-09-30","publicationStatus":"PW","scienceBaseUri":"5a719272e4b0a9a2e9dbde33","contributors":{"authors":[{"text":"Lane, John W. Jr. 0000-0002-3558-243X jwlane@usgs.gov","orcid":"https://orcid.org/0000-0002-3558-243X","contributorId":189168,"corporation":false,"usgs":true,"family":"Lane","given":"John","suffix":"Jr.","email":"jwlane@usgs.gov","middleInitial":"W.","affiliations":[{"id":493,"text":"Office of Ground Water","active":true,"usgs":true},{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true}],"preferred":false,"id":720338,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"White, Eric A. 0000-0002-7782-146X eawhite@usgs.gov","orcid":"https://orcid.org/0000-0002-7782-146X","contributorId":1737,"corporation":false,"usgs":false,"family":"White","given":"Eric","email":"eawhite@usgs.gov","middleInitial":"A.","affiliations":[],"preferred":true,"id":720335,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Steele, Gregory V. gvsteele@usgs.gov","contributorId":783,"corporation":false,"usgs":true,"family":"Steele","given":"Gregory","email":"gvsteele@usgs.gov","middleInitial":"V.","affiliations":[{"id":464,"text":"Nebraska Water Science Center","active":true,"usgs":true}],"preferred":true,"id":720336,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cannia, James C.","contributorId":94356,"corporation":false,"usgs":true,"family":"Cannia","given":"James","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":720337,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70033414,"text":"70033414 - 2008 - Eruptive history and tectonic setting of Medicine Lake Volcano, a large rear-arc volcano in the southern Cascades","interactions":[],"lastModifiedDate":"2019-03-07T09:29:46","indexId":"70033414","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2499,"text":"Journal of Volcanology and Geothermal Research","active":true,"publicationSubtype":{"id":10}},"title":"Eruptive history and tectonic setting of Medicine Lake Volcano, a large rear-arc volcano in the southern Cascades","docAbstract":"

Medicine Lake Volcano (MLV), located in the southern Cascades ∼ 55 km east-northeast of contemporaneous Mount Shasta, has been found by exploratory geothermal drilling to have a surprisingly silicic core mantled by mafic lavas. This unexpected result is very different from the long-held view derived from previous mapping of exposed geology that MLV is a dominantly basaltic shield volcano. Detailed mapping shows that < 6% of the ∼ 2000 km2 of mapped MLV lavas on this southern Cascade Range shield-shaped edifice are rhyolitic and dacitic, but drill holes on the edifice penetrated more than 30% silicic lava. Argon dating yields ages in the range ∼ 475 to 300 ka for early rhyolites. Dates on the stratigraphically lowest mafic lavas at MLV fall into this time frame as well, indicating that volcanism at MLV began about half a million years ago. Mafic compositions apparently did not dominate until ∼ 300 ka. Rhyolite eruptions were scarce post-300 ka until late Holocene time. However, a dacite episode at ∼ 200 to ∼ 180 ka included the volcano's only ash-flow tuff, which was erupted from within the summit caldera. At ∼ 100 ka, compositionally distinctive high-Na andesite and minor dacite built most of the present caldera rim. Eruption of these lavas was followed soon after by several large basalt flows, such that the combined area covered by eruptions between 100 ka and postglacial time amounts to nearly two-thirds of the volcano's area. Postglacial eruptive activity was strongly episodic and also covered a disproportionate amount of area. The volcano has erupted 9 times in the past 5200 years, one of the highest rates of late Holocene eruptive activity in the Cascades. Estimated volume of MLV is ∼ 600 km3, giving an overall effusion rate of ∼ 1.2 km3 per thousand years, although the rate for the past 100 kyr may be only half that. During much of the volcano's history, both dry HAOT (high-alumina olivine tholeiite) and hydrous calcalkaline basalts erupted together in close temporal and spatial proximity. Petrologic studies indicate that the HAOT magmas were derived by dry melting of spinel peridotite mantle near the crust mantle boundary. Subduction-derived H2O-rich fluids played an important role in the generation of calcalkaline magmas. Petrology, geochemistry and proximity indicate that MLV is part of the Cascades magmatic arc and not a Basin and Range volcano, although Basin and Range extension impinges on the volcano and strongly influences its eruptive style. MLV may be analogous to Mount Adams in southern Washington, but not, as sometimes proposed, to the older distributed back-arc Simcoe Mountains volcanic field.

","language":"English","publisher":"Elsevier","doi":"10.1016/j.jvolgeores.2008.04.023","issn":"03770","usgsCitation":"Donnelly-Nolan, J.M., Grove, T., Lanphere, M.A., Champion, D.E., and Ramsey, D.W., 2008, Eruptive history and tectonic setting of Medicine Lake Volcano, a large rear-arc volcano in the southern Cascades: Journal of Volcanology and Geothermal Research, v. 177, no. 2, p. 313-328, https://doi.org/10.1016/j.jvolgeores.2008.04.023.","productDescription":"16 p.","startPage":"313","endPage":"328","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":240866,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213259,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jvolgeores.2008.04.023"}],"volume":"177","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0a57e4b0c8380cd522f3","contributors":{"authors":[{"text":"Donnelly-Nolan, Julie M. 0000-0001-8714-9606 jdnolan@usgs.gov","orcid":"https://orcid.org/0000-0001-8714-9606","contributorId":3271,"corporation":false,"usgs":true,"family":"Donnelly-Nolan","given":"Julie","email":"jdnolan@usgs.gov","middleInitial":"M.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":440779,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Grove, Timothy L.","contributorId":68546,"corporation":false,"usgs":true,"family":"Grove","given":"Timothy L.","affiliations":[],"preferred":false,"id":440775,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lanphere, M. A.","contributorId":35298,"corporation":false,"usgs":true,"family":"Lanphere","given":"M.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":440776,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Champion, Duane E. 0000-0001-7854-9034 dchamp@usgs.gov","orcid":"https://orcid.org/0000-0001-7854-9034","contributorId":2912,"corporation":false,"usgs":true,"family":"Champion","given":"Duane","email":"dchamp@usgs.gov","middleInitial":"E.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":440777,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ramsey, David W. 0000-0003-1698-2523 dramsey@usgs.gov","orcid":"https://orcid.org/0000-0003-1698-2523","contributorId":3819,"corporation":false,"usgs":true,"family":"Ramsey","given":"David","email":"dramsey@usgs.gov","middleInitial":"W.","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":440778,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70033105,"text":"70033105 - 2008 - Multiple plagioclase crystal populations identified by crystal size distribution and in situ chemical data: Implications for timescales of magma chamber processes associated with the 1915 eruption of Lassen Peak, CA","interactions":[],"lastModifiedDate":"2019-03-28T16:49:30","indexId":"70033105","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2420,"text":"Journal of Petrology","active":true,"publicationSubtype":{"id":10}},"title":"Multiple plagioclase crystal populations identified by crystal size distribution and in situ chemical data: Implications for timescales of magma chamber processes associated with the 1915 eruption of Lassen Peak, CA","docAbstract":"

Products of the 1915 Lassen Peak eruption reveal evidence for a magma recharge–magma mixing event that may have catalyzed the eruption and from which four compositional members were identified: light dacite, black dacite, andesitic inclusion, and dark andesite. Crystal size distribution, textural, and in situ chemical (major and trace element and Sr isotope) data for plagioclase from these compositional products define three crystal populations that have distinct origins: phenocrysts (long axis > 0·5 mm) that typically have core An contents between 34 and 36 mol %, microphenocrysts (long axis between 0·1 and 0·5 mm) that have core An contents of 66–69, and microlites (long axis < 0·1 mm) with variable An core contents from 64 to 52. Phenocrysts are interpreted to form in an isolated dacitic magma chamber that experienced slow cooling. Based on textural, compositional, and isotopic data for the magma represented by the dacitic component, magma recharge was not an important process until just prior to the 1915 eruption. Average residence times for phenocrysts are in the range of centuries to millennia. Microphenocrysts formed in a hybrid layer that resulted from mixing between end-member reservoir dacite and recharge magma of basaltic andesite composition. High thermal contrast between the two end-member magmas led to relatively high degrees of undercooling, which resulted in faster crystal growth rates and acicular and swallowtail crystal habits. Some plagioclase phenocrysts from the dacitic chamber were incorporated into the hybrid layer and underwent dissolution–precipitation, seen in both crystal textures and rim compositions. Average microphenocryst residence times are of the order of months. Microlites may have formed in response to decompression and/or syn-eruptive degassing as magma ascended from the chamber through the volcanic conduit. Chemical distinctions in plagioclase microlite An contents reveal that melt of the dark andesite was more mafic than the melt of the other three compositions. We suggest that mixing of an intruding basaltic andesite and reservoir dacite before magma began ascending in the conduit allowed formation of a compositionally distinct microlite population. Melt in the other three products was more evolved because it had undergone differentiation during the months following initial mixing; as a consequence, melt and microlites among these three products have similar compositions. The results of this study highlight the integrated use of crystal size distribution, textural, and in situ chemical data in identifying distinct crystal populations and linking these populations to the thermal and chemical characteristics of complex magma bodies.

","language":"English","publisher":"Oxford Academic","doi":"10.1093/petrology/egn045","issn":"00223","usgsCitation":"Salisbury, M., Bohrson, W., Clynne, M., Ramos, F., and Hoskin, P., 2008, Multiple plagioclase crystal populations identified by crystal size distribution and in situ chemical data: Implications for timescales of magma chamber processes associated with the 1915 eruption of Lassen Peak, CA: Journal of Petrology, v. 49, no. 10, p. 1755-1780, https://doi.org/10.1093/petrology/egn045.","productDescription":"26 p.","startPage":"1755","endPage":"1780","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":476642,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1093/petrology/egn045","text":"Publisher Index Page"},{"id":241085,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213459,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1093/petrology/egn045"}],"volume":"49","issue":"10","noUsgsAuthors":false,"publicationDate":"2008-10-10","publicationStatus":"PW","scienceBaseUri":"505a6076e4b0c8380cd71498","contributors":{"authors":[{"text":"Salisbury, M.J.","contributorId":50362,"corporation":false,"usgs":true,"family":"Salisbury","given":"M.J.","email":"","affiliations":[],"preferred":false,"id":439390,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bohrson, W.A.","contributorId":102092,"corporation":false,"usgs":false,"family":"Bohrson","given":"W.A.","affiliations":[],"preferred":false,"id":439393,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Clynne, M.A.","contributorId":90722,"corporation":false,"usgs":true,"family":"Clynne","given":"M.A.","affiliations":[],"preferred":false,"id":439392,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ramos, F.C.","contributorId":81698,"corporation":false,"usgs":true,"family":"Ramos","given":"F.C.","email":"","affiliations":[],"preferred":false,"id":439391,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hoskin, P.","contributorId":42435,"corporation":false,"usgs":true,"family":"Hoskin","given":"P.","email":"","affiliations":[],"preferred":false,"id":439389,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70033312,"text":"70033312 - 2008 - The 2005 eruption of Sierra Negra volcano, Galápagos, Ecuador","interactions":[],"lastModifiedDate":"2016-08-29T15:11:17","indexId":"70033312","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1109,"text":"Bulletin of Volcanology","active":true,"publicationSubtype":{"id":10}},"title":"The 2005 eruption of Sierra Negra volcano, Galápagos, Ecuador","docAbstract":"

Sierra Negra volcano began erupting on 22 October 2005, after a repose of 26 years. A plume of ash and steam more than 13 km high accompanied the initial phase of the eruption and was quickly followed by a ~2-km-long curtain of lava fountains. The eruptive fissure opened inside the north rim of the caldera, on the opposite side of the caldera from an active fault system that experienced an mb 4.6 earthquake and ~84 cm of uplift on 16 April 2005. The main products of the eruption were an `a`a flow that ponded in the caldera and clastigenic lavas that flowed down the north flank. The `a`a flow grew in an unusual way. Once it had established most of its aerial extent, the interior of the flow was fed via a perched lava pond, causing inflation of the `a`a. This pressurized fluid interior then fed pahoehoe breakouts along the margins of the flow, many of which were subsequently overridden by `a`a, as the crust slowly spread from the center of the pond and tumbled over the pahoehoe. The curtain of lava fountains coalesced with time, and by day 4, only one vent was erupting. The effusion rate slowed from day 7 until the eruption’s end two days later on 30 October. Although the caldera floor had inflated by ~5 m since 1992, and the rate of inflation had accelerated since 2003, there was no transient deformation in the hours or days before the eruption. During the 8 days of the eruption, GPS and InSAR data show that the caldera floor deflated ~5 m, and the volcano contracted horizontally ~6 m. The total eruptive volume is estimated as being ~150×106 m3. The opening-phase tephra is more evolved than the eruptive products that followed. The compositional variation of tephra and lava sampled over the course of the eruption is attributed to eruption from a zoned sill that lies 2.1 km beneath the caldera floor.

","language":"English","publisher":"Springer International","doi":"10.1007/s00445-007-0160-3","issn":"02588900","usgsCitation":"Geist, D.J., Harpp, K.S., Naumann, T.R., Poland, M., Chadwick, W.W., Hall, M., and Rader, E., 2008, The 2005 eruption of Sierra Negra volcano, Galápagos, Ecuador: Bulletin of Volcanology, v. 70, no. 6, p. 655-673, https://doi.org/10.1007/s00445-007-0160-3.","productDescription":"19 p.","startPage":"655","endPage":"673","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":241099,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Ecuador","state":"Galapagos","otherGeospatial":"Sierre Negra volcano","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -91.22772216796875,\n -0.9063342699592115\n ],\n [\n -91.22772216796875,\n -0.7305710228984912\n ],\n [\n -91.00799560546875,\n -0.7305710228984912\n ],\n [\n -91.00799560546875,\n -0.9063342699592115\n ],\n [\n -91.22772216796875,\n -0.9063342699592115\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"70","issue":"6","noUsgsAuthors":false,"publicationDate":"2007-07-31","publicationStatus":"PW","scienceBaseUri":"505ba649e4b08c986b32100b","contributors":{"authors":[{"text":"Geist, Dennis J.","contributorId":47145,"corporation":false,"usgs":true,"family":"Geist","given":"Dennis","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":440293,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Harpp, Karen S.","contributorId":12271,"corporation":false,"usgs":true,"family":"Harpp","given":"Karen","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":440291,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Naumann, Terry R.","contributorId":61652,"corporation":false,"usgs":true,"family":"Naumann","given":"Terry","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":440296,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Poland, Michael P. 0000-0001-5240-6123 mpoland@usgs.gov","orcid":"https://orcid.org/0000-0001-5240-6123","contributorId":635,"corporation":false,"usgs":true,"family":"Poland","given":"Michael P.","email":"mpoland@usgs.gov","affiliations":[{"id":336,"text":"Hawaiian Volcano Observatory","active":false,"usgs":true}],"preferred":false,"id":440294,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Chadwick, William W.","contributorId":77042,"corporation":false,"usgs":true,"family":"Chadwick","given":"William","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":440297,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Hall, Minard","contributorId":13044,"corporation":false,"usgs":true,"family":"Hall","given":"Minard","affiliations":[],"preferred":false,"id":440292,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Rader, Erika","contributorId":53172,"corporation":false,"usgs":true,"family":"Rader","given":"Erika","affiliations":[],"preferred":false,"id":440295,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70030447,"text":"70030447 - 2008 - Hydrochemical characterization of groundwater in the Akyem area, Ghana","interactions":[],"lastModifiedDate":"2012-03-12T17:21:04","indexId":"70030447","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2257,"text":"Journal of Environmental Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Hydrochemical characterization of groundwater in the Akyem area, Ghana","docAbstract":"The Akyem area is a small farming community located in southeastern Ghana. Groundwater samples from wells in the area were analyzed for concentrations of the major ions, silica, electrical conductivity and pH. The objective was to determine the main controls on the hydrochemistry of ground-water. Mass balance modeling was used together with multivariate R-mode hierarchical cluster analysis to determine the significant sources of variation in the hydrochemistry. Two water types exist in this area. The first is influenced most by the weathering of silicate minerals from the underlying geology, and is thus rich in silica, sodium, calcium, bicarbonate, and magnesium ions. The second is water that has been influenced by the effects of fertilizers and other anthropogenic activities in the area. Mineral speciation and silicate mineral stability diagrams suggest that montmorillonite, probably derived from the incongruent dissolution of feldspars and micas, is the most stable silicate phase in the groundwaters. The apparent incongruent weathering of silicate minerals in the groundwater system has led to the enrichment of sodium, calcium, magnesium and bicarbonate ions as well as silica, leading to the supersaturation of calcite, aragonite, dolomite and quartz. Stability in the montmorillonite field suggests restricted flow conditions and a long groundwater residence time, leading to greater exposure of the rock to weathering. Cation exchange processes appear to play minor roles in the hydrochemistry of groundwater.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Environmental Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"10583","usgsCitation":"Banoeng-Yakubo, B., Yidana, S., Anku, Y., Akabzaa, T., and Asiedu, D., 2008, Hydrochemical characterization of groundwater in the Akyem area, Ghana: Journal of Environmental Hydrology, v. 16, p. 1-12.","startPage":"1","endPage":"12","numberOfPages":"12","costCenters":[],"links":[{"id":239172,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a332ce4b0c8380cd5edbf","contributors":{"authors":[{"text":"Banoeng-Yakubo, B.","contributorId":75332,"corporation":false,"usgs":true,"family":"Banoeng-Yakubo","given":"B.","email":"","affiliations":[],"preferred":false,"id":427190,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Yidana, S.M.","contributorId":59554,"corporation":false,"usgs":true,"family":"Yidana","given":"S.M.","email":"","affiliations":[],"preferred":false,"id":427189,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Anku, Y.","contributorId":96083,"corporation":false,"usgs":true,"family":"Anku","given":"Y.","affiliations":[],"preferred":false,"id":427192,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Akabzaa, T.","contributorId":39580,"corporation":false,"usgs":true,"family":"Akabzaa","given":"T.","email":"","affiliations":[],"preferred":false,"id":427188,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Asiedu, D.","contributorId":76131,"corporation":false,"usgs":true,"family":"Asiedu","given":"D.","affiliations":[],"preferred":false,"id":427191,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70032915,"text":"70032915 - 2008 - Guidelines for landslide susceptibility, hazard and risk zoning for land-use planning","interactions":[],"lastModifiedDate":"2012-03-12T17:21:21","indexId":"70032915","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1517,"text":"Engineering Geology","active":true,"publicationSubtype":{"id":10}},"title":"Guidelines for landslide susceptibility, hazard and risk zoning for land-use planning","docAbstract":"[No abstract available]","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Engineering Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.enggeo.2008.03.014","issn":"00137","usgsCitation":"Fell, R., Corominas, J., Bonnard, C., Cascini, L., Leroi, E., and Savage, W.Z., 2008, Guidelines for landslide susceptibility, hazard and risk zoning for land-use planning: Engineering Geology, v. 102, no. 3-4, p. 99-111, https://doi.org/10.1016/j.enggeo.2008.03.014.","startPage":"99","endPage":"111","numberOfPages":"13","costCenters":[],"links":[{"id":476689,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://figshare.com/articles/journal_contribution/Guidelines_for_landslide_susceptibility_hazard_and_risk_zoning_for_land_use_planning/27715584","text":"External Repository"},{"id":213576,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.enggeo.2008.03.014"},{"id":241214,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"102","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a2e3ce4b0c8380cd5c3d2","contributors":{"authors":[{"text":"Fell, R.","contributorId":33132,"corporation":false,"usgs":true,"family":"Fell","given":"R.","email":"","affiliations":[],"preferred":false,"id":438490,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Corominas, J.","contributorId":28811,"corporation":false,"usgs":true,"family":"Corominas","given":"J.","email":"","affiliations":[],"preferred":false,"id":438488,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bonnard, C.","contributorId":80088,"corporation":false,"usgs":true,"family":"Bonnard","given":"C.","email":"","affiliations":[],"preferred":false,"id":438492,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cascini, L.","contributorId":29650,"corporation":false,"usgs":true,"family":"Cascini","given":"L.","email":"","affiliations":[],"preferred":false,"id":438489,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Leroi, E.","contributorId":67300,"corporation":false,"usgs":true,"family":"Leroi","given":"E.","email":"","affiliations":[],"preferred":false,"id":438491,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Savage, W. Z.","contributorId":106481,"corporation":false,"usgs":true,"family":"Savage","given":"W.","email":"","middleInitial":"Z.","affiliations":[],"preferred":false,"id":438493,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70030237,"text":"70030237 - 2008 - Overcompensatory response of a smallmouth bass (Micropterus dolomieu) population to harvest: Release from competition?","interactions":[],"lastModifiedDate":"2012-03-12T17:21:01","indexId":"70030237","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1169,"text":"Canadian Journal of Fisheries and Aquatic Sciences","active":true,"publicationSubtype":{"id":10}},"title":"Overcompensatory response of a smallmouth bass (Micropterus dolomieu) population to harvest: Release from competition?","docAbstract":"An intensive seven-year removal of adult, juvenile, and young-of-the-year smallmouth bass (Micropterus dolomieu) from a north temperate lake (Little Moose Lake, New York, USA) resulted in an increase in overall population abundance, primarily due to increased abundance of immature individuals. We developed a density-dependent, stage-structured model to examine conditions under which population control through harvest could result in the increase of a targeted species. Parameter values were derived from a 54-year data set collected from another north temperate lake (Lake Opeongo, Ontario, Canada) smallmouth bass population. Sensitivity analyses identified the demographic conditions that could lead to increased abundance in response to harvest. An increase in population abundance with harvest was most likely to occur when either (i) per capita recruitment at low levels of spawner abundance was large, juvenile survivorship was high, and maturation of age-4 and older juveniles was moderately high or (ii) per capita recruitment at low levels of spawner abundance was slightly lower, yet the maturation rate of age-3 juveniles and adult survivorship were high. Our modeling results together with empirical evidence further demonstrate the importance of overcompensation as a substantial factor to consider in efforts to regulate population abundance through harvest. ?? 2008 NRC.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Canadian Journal of Fisheries and Aquatic Sciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1139/F08-133","issn":"07066","usgsCitation":"Zipkin, E., Sullivan, P., Cooch, E., Kraft, C., Shuter, B., and Weidel, B., 2008, Overcompensatory response of a smallmouth bass (Micropterus dolomieu) population to harvest: Release from competition?: Canadian Journal of Fisheries and Aquatic Sciences, v. 65, no. 10, p. 2279-2292, https://doi.org/10.1139/F08-133.","startPage":"2279","endPage":"2292","numberOfPages":"14","costCenters":[],"links":[{"id":239087,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211739,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1139/F08-133"}],"volume":"65","issue":"10","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a71d4e4b0c8380cd767a7","contributors":{"authors":[{"text":"Zipkin, E.F.","contributorId":52790,"corporation":false,"usgs":true,"family":"Zipkin","given":"E.F.","affiliations":[],"preferred":false,"id":426249,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sullivan, P.J.","contributorId":38762,"corporation":false,"usgs":true,"family":"Sullivan","given":"P.J.","email":"","affiliations":[],"preferred":false,"id":426246,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Cooch, E.G.","contributorId":40932,"corporation":false,"usgs":true,"family":"Cooch","given":"E.G.","email":"","affiliations":[],"preferred":false,"id":426247,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kraft, C.E.","contributorId":80610,"corporation":false,"usgs":true,"family":"Kraft","given":"C.E.","email":"","affiliations":[],"preferred":false,"id":426250,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Shuter, B.J.","contributorId":6661,"corporation":false,"usgs":true,"family":"Shuter","given":"B.J.","email":"","affiliations":[],"preferred":false,"id":426245,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Weidel, B.C.","contributorId":47978,"corporation":false,"usgs":true,"family":"Weidel","given":"B.C.","affiliations":[],"preferred":false,"id":426248,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70032885,"text":"70032885 - 2008 - Resolving model parameter values from carbon and nitrogen stock measurements in a wide range of tropical mature forests using nonlinear inversion and regression trees","interactions":[],"lastModifiedDate":"2017-04-03T14:12:35","indexId":"70032885","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1458,"text":"Ecological Modelling","active":true,"publicationSubtype":{"id":10}},"title":"Resolving model parameter values from carbon and nitrogen stock measurements in a wide range of tropical mature forests using nonlinear inversion and regression trees","docAbstract":"Objectively assessing the performance of a model and deriving model parameter values from observations are critical and challenging in landscape to regional modeling. In this paper, we applied a nonlinear inversion technique to calibrate the ecosystem model CENTURY against carbon (C) and nitrogen (N) stock measurements collected from 39 mature tropical forest sites in seven life zones in Costa Rica. Net primary productivity from the Moderate-Resolution Imaging Spectroradiometer (MODIS), C and N stocks in aboveground live biomass, litter, coarse woody debris (CWD), and in soils were used to calibrate the model. To investigate the resolution of available observations on the number of adjustable parameters, inversion was performed using nine setups of adjustable parameters. Statistics including observation sensitivity, parameter correlation coefficient, parameter sensitivity, and parameter confidence limits were used to evaluate the information content of observations, resolution of model parameters, and overall model performance. Results indicated that soil organic carbon content, soil nitrogen content, and total aboveground biomass carbon had the highest information contents, while measurements of carbon in litter and nitrogen in CWD contributed little to the parameter estimation processes. The available information could resolve the values of 2-4 parameters. Adjusting just one parameter resulted in under-fitting and unacceptable model performance, while adjusting five parameters simultaneously led to over-fitting. Results further indicated that the MODIS NPP values were compressed as compared with the spatial variability of net primary production (NPP) values inferred from inverse modeling. Using inverse modeling to infer NPP and other sensitive model parameters from C and N stock observations provides an opportunity to utilize data collected by national to regional forest inventory systems to reduce the uncertainties in the carbon cycle and generate valuable databases to validate and improve MODIS NPP algorithms.","language":"English","publisher":"Elsevier","doi":"10.1016/j.ecolmodel.2008.07.025","issn":"03043","usgsCitation":"Liu, S., Anderson, P., Zhou, G., Kauffman, B., Hughes, F., Schimel, D., Watson, V., and Tosi, J., 2008, Resolving model parameter values from carbon and nitrogen stock measurements in a wide range of tropical mature forests using nonlinear inversion and regression trees: Ecological Modelling, v. 219, no. 3-4, p. 327-341, https://doi.org/10.1016/j.ecolmodel.2008.07.025.","productDescription":"15 p.","startPage":"327","endPage":"341","numberOfPages":"15","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":241272,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213626,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.ecolmodel.2008.07.025"}],"volume":"219","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aa9dae4b0c8380cd85feb","contributors":{"authors":[{"text":"Liu, S.","contributorId":93170,"corporation":false,"usgs":true,"family":"Liu","given":"S.","affiliations":[],"preferred":false,"id":438377,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Anderson, P.","contributorId":102682,"corporation":false,"usgs":true,"family":"Anderson","given":"P.","affiliations":[],"preferred":false,"id":438379,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zhou, G.","contributorId":12604,"corporation":false,"usgs":true,"family":"Zhou","given":"G.","email":"","affiliations":[],"preferred":false,"id":438372,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kauffman, B.","contributorId":47176,"corporation":false,"usgs":true,"family":"Kauffman","given":"B.","email":"","affiliations":[],"preferred":false,"id":438375,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hughes, F.","contributorId":101091,"corporation":false,"usgs":true,"family":"Hughes","given":"F.","email":"","affiliations":[],"preferred":false,"id":438378,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Schimel, D.","contributorId":38781,"corporation":false,"usgs":true,"family":"Schimel","given":"D.","affiliations":[],"preferred":false,"id":438374,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Watson, Vicente","contributorId":31992,"corporation":false,"usgs":true,"family":"Watson","given":"Vicente","email":"","affiliations":[],"preferred":false,"id":438373,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Tosi, Joseph","contributorId":67302,"corporation":false,"usgs":true,"family":"Tosi","given":"Joseph","email":"","affiliations":[],"preferred":false,"id":438376,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ,{"id":70032756,"text":"70032756 - 2008 - Estimating groundwater recharge in Hebei Plain, China under varying land use practices using tritium and bromide tracers","interactions":[],"lastModifiedDate":"2012-03-12T17:21:23","indexId":"70032756","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Estimating groundwater recharge in Hebei Plain, China under varying land use practices using tritium and bromide tracers","docAbstract":"Tritium and bromide were used as applied tracers to determine groundwater recharge in Hebei Plain, North China, to evaluate the impacts of different soil types, land use, irrigation, and crop cultivation practice on recharge. Additional objectives were to evaluate temporal variability of recharge and the effect on results of the particular tracer used. Thirty-nine profiles at representative locations were chosen for investigation. Average recharge rates and recharge coefficient determined by tritium and bromide tracing for different sites were 0.00-1.05 mm/d and 0.0-42.5%, respectively. The results showed relative recharge rates for the following paired influences (items within each pair are listed with the influence producing greater recharge first): flood-irrigated cropland and non-irrigated non-cultivation land, flood irrigation (0.42-0.58 mm/d) and sprinkling irrigation (0.17-0.23 mm/d), no stalk mulch (0.56-0.80 mm/d) and stalk mulch (0.44-0.60 mm/d), vegetable (e.g. Chinese cabbage and garlic, 0.70 mm/d) and wheat-maize (0.38 mm/d), peanut (0.51 mm/d) and peach (0.43 mm/d). The results also showed greater recharge for the first year of tracer travel than for the second. Because total precipitation and irrigation were greater in the first year than in the second, this may reflect temporal variability of recharge. The method may not be applicable where the water table is shallow (less than 3 m). A comparison of the near-ideal tritium tracer with the more common but less ideal bromide showed that bromide moved approximately 23% faster than tritiated water, perhaps because of anion exclusion. ?? 2008 Elsevier B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jhydrol.2008.04.011","issn":"00221694","usgsCitation":"Wang, B., Jin, M., Nimmo, J., Yang, L., and Wang, W., 2008, Estimating groundwater recharge in Hebei Plain, China under varying land use practices using tritium and bromide tracers: Journal of Hydrology, v. 356, no. 1-2, p. 209-222, https://doi.org/10.1016/j.jhydrol.2008.04.011.","startPage":"209","endPage":"222","numberOfPages":"14","costCenters":[],"links":[{"id":213737,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jhydrol.2008.04.011"},{"id":241394,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"356","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0b20e4b0c8380cd525ac","contributors":{"authors":[{"text":"Wang, B.","contributorId":29011,"corporation":false,"usgs":true,"family":"Wang","given":"B.","email":"","affiliations":[],"preferred":false,"id":437772,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jin, M.","contributorId":44745,"corporation":false,"usgs":true,"family":"Jin","given":"M.","email":"","affiliations":[],"preferred":false,"id":437773,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nimmo, J. R. 0000-0001-8191-1727","orcid":"https://orcid.org/0000-0001-8191-1727","contributorId":58304,"corporation":false,"usgs":true,"family":"Nimmo","given":"J. R.","affiliations":[],"preferred":false,"id":437774,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Yang, L.","contributorId":6200,"corporation":false,"usgs":true,"family":"Yang","given":"L.","affiliations":[],"preferred":false,"id":437771,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Wang, W.","contributorId":76003,"corporation":false,"usgs":true,"family":"Wang","given":"W.","affiliations":[],"preferred":false,"id":437775,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70033097,"text":"70033097 - 2008 - Change-in-ratio density estimator for feral pigs is less biased than closed mark-recapture estimates","interactions":[],"lastModifiedDate":"2012-03-12T17:21:38","indexId":"70033097","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3777,"text":"Wildlife Research","active":true,"publicationSubtype":{"id":10}},"title":"Change-in-ratio density estimator for feral pigs is less biased than closed mark-recapture estimates","docAbstract":"Closed-population capture-mark-recapture (CMR) methods can produce biased density estimates for species with low or heterogeneous detection probabilities. In an attempt to address such biases, we developed a density-estimation method based on the change in ratio (CIR) of survival between two populations where survival, calculated using an open-population CMR model, is known to differ. We used our method to estimate density for a feral pig (Sus scrofa) population on Fort Benning, Georgia, USA. To assess its validity, we compared it to an estimate of the minimum density of pigs known to be alive and two estimates based on closed-population CMR models. Comparison of the density estimates revealed that the CIR estimator produced a density estimate with low precision that was reasonable with respect to minimum known density. By contrast, density point estimates using the closed-population CMR models were less than the minimum known density, consistent with biases created by low and heterogeneous capture probabilities for species like feral pigs that may occur in low density or are difficult to capture. Our CIR density estimator may be useful for tracking broad-scale, long-term changes in species, such as large cats, for which closed CMR models are unlikely to work. ?? CSIRO 2008.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Wildlife Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1071/WR08076","issn":"10353","usgsCitation":"Hanson, L., Grand, J., Mitchell, M., Jolley, D., Sparklin, B., and Ditchkoff, S., 2008, Change-in-ratio density estimator for feral pigs is less biased than closed mark-recapture estimates: Wildlife Research, v. 35, no. 7, p. 695-699, https://doi.org/10.1071/WR08076.","startPage":"695","endPage":"699","numberOfPages":"5","costCenters":[],"links":[{"id":213361,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1071/WR08076"},{"id":240979,"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":"5059f403e4b0c8380cd4bab6","contributors":{"authors":[{"text":"Hanson, L.B.","contributorId":36759,"corporation":false,"usgs":true,"family":"Hanson","given":"L.B.","email":"","affiliations":[],"preferred":false,"id":439361,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Grand, J.B.","contributorId":11150,"corporation":false,"usgs":true,"family":"Grand","given":"J.B.","email":"","affiliations":[],"preferred":false,"id":439358,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mitchell, M.S.","contributorId":26724,"corporation":false,"usgs":true,"family":"Mitchell","given":"M.S.","email":"","affiliations":[],"preferred":false,"id":439359,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jolley, D.B.","contributorId":60862,"corporation":false,"usgs":true,"family":"Jolley","given":"D.B.","email":"","affiliations":[],"preferred":false,"id":439362,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Sparklin, B.D.","contributorId":30047,"corporation":false,"usgs":true,"family":"Sparklin","given":"B.D.","email":"","affiliations":[],"preferred":false,"id":439360,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Ditchkoff, S.S.","contributorId":100580,"corporation":false,"usgs":true,"family":"Ditchkoff","given":"S.S.","affiliations":[],"preferred":false,"id":439363,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70033512,"text":"70033512 - 2008 - Influenza A virus infections in land birds, People's Republic of China","interactions":[],"lastModifiedDate":"2019-12-10T09:52:06","indexId":"70033512","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1493,"text":"Emerging Infectious Diseases","active":true,"publicationSubtype":{"id":10}},"title":"Influenza A virus infections in land birds, People's Republic of China","docAbstract":"

Water birds are considered the reservoir for avian influenza viruses. We examined this assumption by sampling and real-time reverse transcription-PCR testing of 939 Asian land birds of 153 species. Influenza A infection was found, particularly among migratory species. Surveillance programs for monitoring spread of these viruses need to be redesigned.

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