{"pageNumber":"2065","pageRowStart":"51600","pageSize":"25","recordCount":184743,"records":[{"id":70033943,"text":"70033943 - 2009 - Mesozoic magmatism in an upper- to middle-crustal section through the Cordilleran continental margin arc, eastern Transverse Ranges, California","interactions":[],"lastModifiedDate":"2012-03-12T17:21:31","indexId":"70033943","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","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":"Mesozoic magmatism in an upper- to middle-crustal section through the Cordilleran continental margin arc, eastern Transverse Ranges, California","docAbstract":"The eastern Transverse Ranges provide essentially continuous exposure for >100 km across the strike of the Mesozoic Cordilleran orogen. Thermobarometric calculations based on hornblende and plagioclase compositions in Mesozoic plutonic rocks show that the fi rst-order distribution of rock units resulted from differential Laramide exhumation. Mesozoic supracrustal rocks are preserved in the relatively little exhumed eastern part of the eastern Transverse Ranges and south-central Mojave Desert, and progressively greater rock uplift and exhumation toward the west exposed rocks originating at mid-crustal depths. The eastern Transverse Ranges thus constitute a tilted, nearly continuously exposed crustal section of the Mesozoic magmatic arc and framework rocks from subvolcanic levels to paleodepths as great as ??22 km. The base of this tilted arc section is a moderately east-dipping sheeted magmatic complex >10 km in width by 70 km in length, constructed structurally beneath, yet synchronous with Late Jurassic and Cretaceous upper-crustal plutons. Geochronology and regional structural relations thus suggest that arc magmas generated in the lower crust of this continental arc interacted in a complex mid-crustal zone of crystallization and mixing; products of this zone were parental magmas that formed relatively homogeneous upper crustal felsic plutons and fed lavas and voluminous ignimbrites. ?? 2009 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":"10.1130/2009.2456(07)","issn":"00721077","usgsCitation":"Needy, S., Anderson, J.L., Wooden, J.L., Fleck, R., Barth, A.P., Paterson, S.R., Memeti, V., and Pignotta, G., 2009, Mesozoic magmatism in an upper- to middle-crustal section through the Cordilleran continental margin arc, eastern Transverse Ranges, California: Special Paper of the Geological Society of America, no. 456, p. 187-218, https://doi.org/10.1130/2009.2456(07).","startPage":"187","endPage":"218","numberOfPages":"32","costCenters":[],"links":[{"id":214482,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/2009.2456(07)"},{"id":242210,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"456","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5455e4b0c8380cd6cf56","contributors":{"authors":[{"text":"Needy, S.K.","contributorId":73026,"corporation":false,"usgs":true,"family":"Needy","given":"S.K.","email":"","affiliations":[],"preferred":false,"id":443312,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Anderson, J. L.","contributorId":103240,"corporation":false,"usgs":true,"family":"Anderson","given":"J.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":443314,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wooden, J. L.","contributorId":58678,"corporation":false,"usgs":true,"family":"Wooden","given":"J.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":443311,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Fleck, R.J.","contributorId":25147,"corporation":false,"usgs":true,"family":"Fleck","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":443308,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Barth, A. P.","contributorId":16997,"corporation":false,"usgs":true,"family":"Barth","given":"A.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":443307,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Paterson, Scott R.","contributorId":38338,"corporation":false,"usgs":false,"family":"Paterson","given":"Scott","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":443309,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Memeti, V.","contributorId":57283,"corporation":false,"usgs":true,"family":"Memeti","given":"V.","email":"","affiliations":[],"preferred":false,"id":443310,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Pignotta, G.S.","contributorId":82936,"corporation":false,"usgs":true,"family":"Pignotta","given":"G.S.","email":"","affiliations":[],"preferred":false,"id":443313,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ,{"id":70034427,"text":"70034427 - 2009 - Low lower crustal velocity across Ethiopia: Is the Main Ethiopian Rift a narrow rift in a hot craton?","interactions":[],"lastModifiedDate":"2012-03-12T17:21:47","indexId":"70034427","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1757,"text":"Geochemistry, Geophysics, Geosystems","active":true,"publicationSubtype":{"id":10}},"title":"Low lower crustal velocity across Ethiopia: Is the Main Ethiopian Rift a narrow rift in a hot craton?","docAbstract":"[1] The Main Ethiopian Rift (MER) is a classic narrow rift that developed in hot, weak lithosphere, not in the initially cold, thick, and strong lithosphere that would be predicted by common models of rift mode formation. Our new 1-D seismic velocity profiles from Rayleigh wave/receiver function joint inversion across the MER and the Ethiopian Plateau indicate that hot lower crust and upper mantle are present throughout the broad region affected by Oligocene flood basalt volcanism, including both the present rift and the adjacent Ethiopian Plateau hundreds of kilometers from the rift valley. The region of hot lithosphere closely corresponds to the region of flood basalt volcanism, and we interpret that the volcanism and thermal perturbation were jointly caused by impingement of the Afar plume head. Across the affected region, Vs is 3.6-3.8 km/s in the lowermost crust and ???4.3 km/s in the uppermost mantle, both ??0.3 km/s lower than in the eastern and western branches of the East African Rift System to the south. We interpret the low Vs in the lower crust and upper mantle as indicative of hot lithosphere with partial melt. Our results lead to a hybrid rift mode, in which the brittle upper crust has developed as a narrow rift along the Neoproterozoic suture between East and West Gondwana, while at depth lithospheric deformation is distributed over the broad region (??400 km wide) thermally perturbed by the broad thermal upwelling associated with the Afar plume head. Development of both the East African Rift System to the south (in cold, strong lithosphere) and the MER to the north (in hot, weak lithosphere) as narrow rifts, despite their vastly different initial thermal states and depth-integrated lithospheric strength, indicates that common models of rift mode formation that focus only on temperature, thickness, and vertical strength profiles do not apply to these classic continental rifts. Instead, inherited structure and associated lithospheric weaknesses are the primary control on the mode of extension. ?? 2009 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geochemistry, Geophysics, Geosystems","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2008GC002293","issn":"15252027","usgsCitation":"Keranen, K., Klemperer, S., Julia, J., Lawrence, J.F., and Nyblade, A., 2009, Low lower crustal velocity across Ethiopia: Is the Main Ethiopian Rift a narrow rift in a hot craton?: Geochemistry, Geophysics, Geosystems, v. 10, no. 5, https://doi.org/10.1029/2008GC002293.","costCenters":[],"links":[{"id":476395,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2008gc002293","text":"Publisher Index Page"},{"id":244856,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216954,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2008GC002293"}],"volume":"10","issue":"5","noUsgsAuthors":false,"publicationDate":"2009-05-08","publicationStatus":"PW","scienceBaseUri":"505a4a08e4b0c8380cd68a92","contributors":{"authors":[{"text":"Keranen, K.M.","contributorId":21788,"corporation":false,"usgs":true,"family":"Keranen","given":"K.M.","email":"","affiliations":[],"preferred":false,"id":445728,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Klemperer, S.L.","contributorId":52734,"corporation":false,"usgs":true,"family":"Klemperer","given":"S.L.","email":"","affiliations":[],"preferred":false,"id":445730,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Julia, J.","contributorId":47202,"corporation":false,"usgs":true,"family":"Julia","given":"J.","email":"","affiliations":[],"preferred":false,"id":445729,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lawrence, J. F.","contributorId":14224,"corporation":false,"usgs":false,"family":"Lawrence","given":"J.","email":"","middleInitial":"F.","affiliations":[{"id":7033,"text":"School of Earth Sciences, Stanford University","active":true,"usgs":false}],"preferred":false,"id":445727,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Nyblade, A.A.","contributorId":75703,"corporation":false,"usgs":true,"family":"Nyblade","given":"A.A.","email":"","affiliations":[],"preferred":false,"id":445731,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70034162,"text":"70034162 - 2009 - Postglacial sedimentary record of the Southern California continental shelf and slope, Point Conception to Dana Point","interactions":[],"lastModifiedDate":"2012-03-12T17:21:44","indexId":"70034162","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","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":"Postglacial sedimentary record of the Southern California continental shelf and slope, Point Conception to Dana Point","docAbstract":"Sedimentary strata on the Southern California shelf and slope (Point Conception to Dana Point) display patterns and rates of sediment accumulation that convey information on sea-level inundation, sediment supply, and oceanic transport processes following the Last Glacial Maximum. In Santa Monica Bay and San Pedro Bay, postglacial transgression is recorded in shelf deposits by wave-ravinement surfaces dated at 13-11 ka and an upsection transition from coastal to shallow-marine sediment facies. Depositional conditions analogous to the modern environment were established in the bays by 8-9 ka. On the continental slope, transgression is evidenced in places by an increase in sediment grain size and accumulation rate ca. 15-10 ka, a consequence of coastal ravinement and downslope resedimentation, perhaps in conjunction with climatic increases in fluvial sediment delivery. Grain sizes and accumulation rates then decreased after 12-10 ka when the shelf flooded and backfilled under rising sea level. The Santa Barbara coastal cell contains the largest mass of postglacial sediment at 32-42 ?? 109 metric tons, most of which occurs between offshore Santa Barbara and Hueneme Canyon. The San Pedro cell contains the second largest quantity of sediment, 8-11 ?? 109 metric tons, much of which is present on the eastern Palos Verdes and outer San Pedro shelves. By comparison, the mass of sediment sequestered within the Santa Monica cell is smaller at ??6-8 ?? 109 metric tons. The postglacial sediment mass distribution among coastal cells reflects the size of local fluvial sediment sources, whereas intracell accumulation patterns reflect antecedent bathymetric features conducive for sediment bypass or trapping. ?? 2009 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":"10.1130/2009.2454(2.5)","issn":"00721077","usgsCitation":"Sommerfield, C., Lee, H., and Normark, W.R., 2009, Postglacial sedimentary record of the Southern California continental shelf and slope, Point Conception to Dana Point: Special Paper of the Geological Society of America, no. 454, p. 89-115, https://doi.org/10.1130/2009.2454(2.5).","startPage":"89","endPage":"115","numberOfPages":"27","costCenters":[],"links":[{"id":216843,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/2009.2454(2.5)"},{"id":244739,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"454","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7e8ce4b0c8380cd7a5e1","contributors":{"authors":[{"text":"Sommerfield, C.K.","contributorId":54387,"corporation":false,"usgs":true,"family":"Sommerfield","given":"C.K.","email":"","affiliations":[],"preferred":false,"id":444377,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lee, H.J.","contributorId":96693,"corporation":false,"usgs":true,"family":"Lee","given":"H.J.","email":"","affiliations":[],"preferred":false,"id":444379,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Normark, W. R.","contributorId":87137,"corporation":false,"usgs":true,"family":"Normark","given":"W.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":444378,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70034425,"text":"70034425 - 2009 - A Viscoelastic earthquake simulator with application to the San Francisco Bay region","interactions":[],"lastModifiedDate":"2017-10-31T15:12:23","indexId":"70034425","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","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":"A Viscoelastic earthquake simulator with application to the San Francisco Bay region","docAbstract":"Earthquake simulation on synthetic fault networks carries great potential for characterizing the statistical patterns of earthquake occurrence. I present an earthquake simulator based on elastic dislocation theory. It accounts for the effects of interseismic tectonic loading, static stress steps at the time of earthquakes, and postearthquake stress readjustment through viscoelastic relaxation of the lower crust and mantle. Earthquake rupture initiation and termination are determined with a Coulomb failure stress criterion and the static cascade model. The simulator is applied to interacting multifault systems: one, a synthetic two-fault network, and the other, a fault network representative of the San Francisco Bay region. The faults are discretized both along strike and along dip and can accommodate both strike slip and dip slip. Stress and seismicity functions are evaluated over 30,000 yr trial time periods, resulting in a detailed statistical characterization of the fault systems. Seismicity functions such as the coefficient of variation and a- and b-values exhibit systematic patterns with respect to simple model parameters. This suggests that reliable estimation of the controlling parameters of an earthquake simulator is a prerequisite to the interpretation of its output in terms of seismic hazard.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin of the Seismological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1785/0120080253","issn":"00371106","usgsCitation":"Pollitz, F., 2009, A Viscoelastic earthquake simulator with application to the San Francisco Bay region: Bulletin of the Seismological Society of America, v. 99, no. 3, p. 1760-1785, https://doi.org/10.1785/0120080253.","productDescription":"26 p.","startPage":"1760","endPage":"1785","numberOfPages":"26","ipdsId":"IP-010397","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":244824,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216922,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1785/0120080253"}],"country":"United States","state":"California","otherGeospatial":"San Francisco Bay Region","volume":"99","issue":"3","noUsgsAuthors":false,"publicationDate":"2009-06-07","publicationStatus":"PW","scienceBaseUri":"5059e314e4b0c8380cd45de9","contributors":{"authors":[{"text":"Pollitz, Fred F. fpollitz@usgs.gov","contributorId":127702,"corporation":false,"usgs":true,"family":"Pollitz","given":"Fred F.","email":"fpollitz@usgs.gov","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":false,"id":445722,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70034092,"text":"70034092 - 2009 - Geologic columns for the ICDP-USGS Eyreville A and B cores, Chesapeake Bay impact structure: Sediment-clast breccias, 1096 to 444 m depth","interactions":[],"lastModifiedDate":"2020-03-27T06:42:51","indexId":"70034092","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","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":"Geologic columns for the ICDP-USGS Eyreville A and B cores, Chesapeake Bay impact structure: Sediment-clast breccias, 1096 to 444 m depth","docAbstract":"

The Eyreville A and B cores, recovered from the “moat” of the Chesapeake Bay impact structure, provide a thick section of sediment-clast breccias and minor stratified sediments from 1095.74 to 443.90 m. This paper discusses the components of these breccias, presents a geologic column and descriptive lithologic framework for them, and formalizes the Exmore Formation. From 1095.74 to ~867 m, the cores consist of nonmarine sediment boulders and sand (rare blocks up to 15.3 m intersected diameter). A sharp contact in both cores at ~867 m marks the lowest clayey, silty, glauconitic quartz sand that constitutes the base of the Exmore Formation and its lower diamicton member. Here, material derived from the upper sediment target layers, as well as some impact ejecta, occurs. The block-dominated member of the Exmore Formation, from ~855–618.23 m, consists of nonmarine sediment blocks and boulders (up to 45.5 m) that are juxtaposed complexly. Blocks of oxidized clay are an important component. Above 618.23 m, which is the base of the informal upper diamicton member of the Exmore Formation, the glauconitic matrix is a consistent component in diamicton layers between nonmarine sediment clasts that decrease in size upward in the section. Crystalline-rock clasts are not randomly distributed but rather form local concentrations. The upper part of the Exmore Formation consists of crudely fining-upward sandy packages capped by laminated silt and clay. The overlap interval of Eyreville A and B (940–~760 m) allows recognition of local similarities and differences in the breccias.

","language":"English","publisher":"Geological Society of America","doi":"10.1130/2009.2458(03)","issn":"00721077","usgsCitation":"Edwards, L.E., Powars, D.S., Gohn, G., and Dypvik, H., 2009, Geologic columns for the ICDP-USGS Eyreville A and B cores, Chesapeake Bay impact structure: Sediment-clast breccias, 1096 to 444 m depth: Special Paper of the Geological Society of America, no. 458, p. 51-89, https://doi.org/10.1130/2009.2458(03).","productDescription":"39 p.","startPage":"51","endPage":"89","numberOfPages":"39","costCenters":[{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true},{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true}],"links":[{"id":244639,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"Chesapeake Bay","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -77.54150390625,\n 36.73888412439431\n ],\n [\n -75.157470703125,\n 36.73888412439431\n ],\n [\n -75.157470703125,\n 39.70718665682654\n ],\n [\n -77.54150390625,\n 39.70718665682654\n ],\n [\n -77.54150390625,\n 36.73888412439431\n ]\n ]\n ]\n }\n }\n ]\n}","issue":"458","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1937e4b0c8380cd558f6","contributors":{"authors":[{"text":"Edwards, Lucy E. 0000-0003-4075-3317 leedward@usgs.gov","orcid":"https://orcid.org/0000-0003-4075-3317","contributorId":2647,"corporation":false,"usgs":true,"family":"Edwards","given":"Lucy","email":"leedward@usgs.gov","middleInitial":"E.","affiliations":[{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true},{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"preferred":true,"id":444039,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Powars, David S. 0000-0002-6787-8964 dspowars@usgs.gov","orcid":"https://orcid.org/0000-0002-6787-8964","contributorId":1181,"corporation":false,"usgs":true,"family":"Powars","given":"David","email":"dspowars@usgs.gov","middleInitial":"S.","affiliations":[{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true},{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"preferred":true,"id":444040,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gohn, Gregory 0000-0003-2000-479X ggohn@usgs.gov","orcid":"https://orcid.org/0000-0003-2000-479X","contributorId":219822,"corporation":false,"usgs":true,"family":"Gohn","given":"Gregory","email":"ggohn@usgs.gov","affiliations":[{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true},{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true}],"preferred":true,"id":444041,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dypvik, H.","contributorId":104299,"corporation":false,"usgs":true,"family":"Dypvik","given":"H.","affiliations":[],"preferred":false,"id":444042,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70034246,"text":"70034246 - 2009 - Rapid measurement of field-saturated hydraulic conductivity for areal characterization","interactions":[],"lastModifiedDate":"2020-11-24T22:34:12.497897","indexId":"70034246","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3674,"text":"Vadose Zone Journal","active":true,"publicationSubtype":{"id":10}},"title":"Rapid measurement of field-saturated hydraulic conductivity for areal characterization","docAbstract":"

To provide an improved methodology for characterizing the field‐saturated hydraulic conductivity (Kfs) over broad areas with extreme spatial variability and ordinary limitations of time and resources, we developed and tested a simplified apparatus and procedure, correcting mathematically for the major deficiencies of the simplified implementation. The methodology includes use of a portable, falling‐head, small‐diameter (∼20 cm) single‐ring infiltrometer and an analytical formula for Kfs that compensates both for nonconstant falling head and for the subsurface radial spreading that unavoidably occurs with small ring size. We applied this method to alluvial fan deposits varying in degree of pedogenic maturity in the arid Mojave National Preserve, California. The measurements are consistent with a more rigorous and time‐consuming Kfs measurement method, produce the expected systematic trends in Kfs when compared among soils of contrasting degrees of pedogenic development, and relate in expected ways to results of widely accepted methods.

","language":"English","publisher":"Soil Science Society of America","doi":"10.2136/vzj2007.0159","usgsCitation":"Nimmo, J., Schmidt, K., Perkins, K., and Stock, J., 2009, Rapid measurement of field-saturated hydraulic conductivity for areal characterization: Vadose Zone Journal, v. 8, no. 1, p. 142-149, https://doi.org/10.2136/vzj2007.0159.","productDescription":"8 p.","startPage":"142","endPage":"149","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":244461,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"8","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a94ede4b0c8380cd816e7","contributors":{"authors":[{"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":444877,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schmidt, K. M. 0000-0003-2365-8035","orcid":"https://orcid.org/0000-0003-2365-8035","contributorId":59830,"corporation":false,"usgs":true,"family":"Schmidt","given":"K. M.","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":false,"id":444878,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Perkins, K. S. 0000-0001-8349-447X","orcid":"https://orcid.org/0000-0001-8349-447X","contributorId":77557,"corporation":false,"usgs":true,"family":"Perkins","given":"K. S.","affiliations":[],"preferred":false,"id":444879,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Stock, J. D. 0000-0001-8565-3577","orcid":"https://orcid.org/0000-0001-8565-3577","contributorId":79998,"corporation":false,"usgs":true,"family":"Stock","given":"J. D.","affiliations":[],"preferred":false,"id":444880,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70176168,"text":"70176168 - 2009 - Facilitating adaptive management in the Chesapeake Bay Watershed through the use of online decision support tools","interactions":[{"subject":{"id":70176168,"text":"70176168 - 2009 - Facilitating adaptive management in the Chesapeake Bay Watershed through the use of online decision support tools","indexId":"70176168","publicationYear":"2009","noYear":false,"title":"Facilitating adaptive management in the Chesapeake Bay Watershed through the use of online decision support tools"},"predicate":"IS_PART_OF","object":{"id":97928,"text":"sir20095049 - 2009 - Planning for an uncertain future - Monitoring, integration, and adaptation","indexId":"sir20095049","publicationYear":"2009","noYear":false,"title":"Planning for an uncertain future - Monitoring, integration, and adaptation"},"id":1}],"isPartOf":{"id":97928,"text":"sir20095049 - 2009 - Planning for an uncertain future - Monitoring, integration, and adaptation","indexId":"sir20095049","publicationYear":"2009","noYear":false,"title":"Planning for an uncertain future - Monitoring, integration, and adaptation"},"lastModifiedDate":"2016-08-30T16:05:07","indexId":"70176168","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Facilitating adaptive management in the Chesapeake Bay Watershed through the use of online decision support tools","docAbstract":"

The Chesapeake Bay Program (CBP) is attempting to more strategically implement management actions to improve the health of the Nation’s largest estuary. In 2007 the U.S. Geological Survey (USGS) and U.S. Environmental Protection Agency (USEPA) CBP office began a joint effort to develop a suite of Internetaccessible decision-support tools and to help meet the needs of CBP partners to improve water quality and habitat conditions in the Chesapeake Bay and its watersheds. An adaptive management framework is being used to provide a structured decision process for information and individual tools needed to implement and assess practices to improve the condition of the Chesapeake Bay ecosystem. The Chesapeake Online Adaptive Support Toolkit (COAST) is a collection of web-based analytical tools and information, organized in an adaptive management framework, intended to aid decisionmakers in protecting and restoring the integrity of the Bay ecosystem. The initial version of COAST is focused on water quality issues. During early and mid- 2008, initial ideas for COAST were shared and discussed with various CBP partners and other potential user groups. At these meetings, test cases were selected to help improve understanding of the types of information and analytical functionality that would be most useful for specific partners’ needs. These discussions added considerable knowledge about the nature of decisionmaking for Federal, State, local and nongovernmental partners. Version 1.0 of COAST, released in early winter of 2008, will be further reviewed to determine improvements needed to address implementation and assessment of water quality practices. Future versions of COAST may address other aspects of ecosystem restoration, including restoration of habitat and living resources and maintaining watershed health.

","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Planning for an uncertain future - Monitoring, integration, and adaptation (SIR 2009-5049)","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"conferenceTitle":"Third interagency conference on research in the watersheds","conferenceDate":"September 8-11, 2008","conferenceLocation":"Estes Park, CO","language":"English","publisher":"U.S Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Mullinx, C., Phillips, S., Shenk, K., Hearn, P., and Devereux, O., 2009, Facilitating adaptive management in the Chesapeake Bay Watershed through the use of online decision support tools, in Planning for an uncertain future - Monitoring, integration, and adaptation (SIR 2009-5049), Estes Park, CO, September 8-11, 2008, p. 213-217.","productDescription":"5 p.","startPage":"213","endPage":"217","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":242,"text":"Eastern Geographic Science Center","active":true,"usgs":true}],"links":[{"id":328077,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":328076,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/sir/2009/5049/pdf/Mullinix.pdf"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"57c6af4de4b0f2f0cebe4ba9","contributors":{"authors":[{"text":"Mullinx, Cassandra","contributorId":174150,"corporation":false,"usgs":false,"family":"Mullinx","given":"Cassandra","email":"","affiliations":[],"preferred":false,"id":647548,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Phillips, Scott swphilli@usgs.gov","contributorId":3515,"corporation":false,"usgs":true,"family":"Phillips","given":"Scott","email":"swphilli@usgs.gov","affiliations":[{"id":374,"text":"Maryland Water Science Center","active":true,"usgs":true}],"preferred":false,"id":647549,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Shenk, Kelly","contributorId":174151,"corporation":false,"usgs":false,"family":"Shenk","given":"Kelly","email":"","affiliations":[],"preferred":false,"id":647550,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hearn, Paul","contributorId":28702,"corporation":false,"usgs":true,"family":"Hearn","given":"Paul","affiliations":[],"preferred":false,"id":647551,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Devereux, Olivia 0000-0002-3911-3307","orcid":"https://orcid.org/0000-0002-3911-3307","contributorId":174152,"corporation":false,"usgs":false,"family":"Devereux","given":"Olivia","email":"","affiliations":[{"id":61674,"text":"Devereux Consulting, Inc","active":true,"usgs":false}],"preferred":false,"id":647552,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70033958,"text":"70033958 - 2009 - Isotopic composition of low-latitude paleoprecipitation during the Early Cretaceous","interactions":[],"lastModifiedDate":"2012-03-12T17:21:33","indexId":"70033958","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Isotopic composition of low-latitude paleoprecipitation during the Early Cretaceous","docAbstract":"The response of the hydrologic cycle in global greenhouse conditions is important to our understanding of future climate change and to the calibration of global climate models. Past greenhouse conditions, such as those of the Cretaceous, can be used to provide empirical data with which to evaluate climate models. Recent empirical studies have utilized pedogenic carbonates to estimate the isotopic composition of meteoric waters and calculate precipitation rates for the AptianAlbian. These studies were limited to data from mid(35??N) to high (75??N) paleolatitudes, and thus future improvements in accuracy will require more estimates of meteoric water compositions from numerous localities around the globe. This study provides data for tropical latitudes (18.5??N paleolatitude) from the Tlayua Formation, Puebla, Mexico. In addition, the study confirms a shallow nearshore depositional environment for the Tlayua Formation. Petrographic observations of fenestral fabrics, gypsum crystal molds, stromatolitic structures, and pedogenic matrix birefringence fabric support the interpretation that the strata represent deposition in a tidal flat environment. Carbonate isotopic data from limestones of the Tlayua Formation provide evidence of early meteoric diagenesis in the form of meteoric calcite lines. These trends in ??18O versus ??13C were used to calculate the mean ??18O value of meteoric water, which is estimated at -5.46 ?? 0.56??? (Vienna Standard Mean Ocean Water [VSMOW]). Positive linear covariant trends in oxygen and carbon isotopic values from some horizons were used to estimate evaporative losses of vadose groundwater from tropical exposure surfaces during the Albian, and the resulting values range from 8% to 12%. However, the presence of evaporative mineral molds indicates more extensive evaporation. The added tropical data improve latitudinal coverage of paleoprecipitation ??18O estimates. The data presented here imply that earlier isotope mass balance models most likely underestimated tropical to subtropical precipitation and evaporation fluxes. The limited latitudinal constraints for earlier isotope mass balance modeling of the Albian hydrologic cycle of the Northern Hemisphere Americas resulted in extrapolated low-latitude precipitation ??18O values that were much heavier (up to 3???) than the values observed in this study. The lighter values identified in this study indicate a more pronounced rainout effect for tropical regions and quite possibly a more vigorous evaporation effect. These and additional low-latitude data are required to better constrain changes in the hydrologic cycle during the Cretaceous greenhouse period, and to reduce the uncertainties resulting from limited geographic coverage of proxy data. ?? 2009 Geological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geological Society of America Bulletin","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/B26453.1","issn":"00167606","usgsCitation":"Suarez, M., Gonzalez, L.A., Ludvigson, G.A., Vega, F., and Alvarado-Ortega, J., 2009, Isotopic composition of low-latitude paleoprecipitation during the Early Cretaceous: Geological Society of America Bulletin, v. 121, no. 11-12, p. 1584-1595, https://doi.org/10.1130/B26453.1.","startPage":"1584","endPage":"1595","numberOfPages":"12","costCenters":[],"links":[{"id":214243,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/B26453.1"},{"id":241943,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"121","issue":"11-12","noUsgsAuthors":false,"publicationDate":"2009-08-28","publicationStatus":"PW","scienceBaseUri":"505a3fa3e4b0c8380cd646a4","contributors":{"authors":[{"text":"Suarez, M.B.","contributorId":18589,"corporation":false,"usgs":true,"family":"Suarez","given":"M.B.","email":"","affiliations":[],"preferred":false,"id":443397,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gonzalez, Luis A.","contributorId":20922,"corporation":false,"usgs":true,"family":"Gonzalez","given":"Luis","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":443398,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ludvigson, Greg A.","contributorId":80803,"corporation":false,"usgs":true,"family":"Ludvigson","given":"Greg","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":443399,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Vega, F.J.","contributorId":97337,"corporation":false,"usgs":true,"family":"Vega","given":"F.J.","email":"","affiliations":[],"preferred":false,"id":443401,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Alvarado-Ortega, J.","contributorId":84574,"corporation":false,"usgs":true,"family":"Alvarado-Ortega","given":"J.","email":"","affiliations":[],"preferred":false,"id":443400,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70033998,"text":"70033998 - 2009 - Web-based decision support and visualization tools for water quality management in the Chesapeake Bay watershed","interactions":[],"lastModifiedDate":"2012-03-12T17:21:43","indexId":"70033998","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Web-based decision support and visualization tools for water quality management in the Chesapeake Bay watershed","docAbstract":"Federal, State, and local water quality managers charged with restoring the Chesapeake Bay ecosystem require tools to maximize the impact of their limited resources. To address this need, the U.S. Geological Survey (USGS) and the Environmental Protection Agency's Chesapeake Bay Program (CBP) are developing a suite of Web-based tools called the Chesapeake Online Assessment Support Toolkit (COAST). The goal of COAST is to help CBP partners identify geographic areas where restoration activities would have the greatest effect, select the appropriate management strategies, and improve coordination and prioritization among partners. As part of the COAST suite of tools focused on environmental restoration, a water quality management visualization component called the Nutrient Yields Mapper (NYM) tool is being developed by USGS. The NYM tool is a web application that uses watershed yield estimates from USGS SPAtially Referenced Regressions On Watershed (SPARROW) attributes model (Schwarz et al., 2006) [6] to allow water quality managers to identify important sources of nitrogen and phosphorous within the Chesapeake Bay watershed. The NYM tool utilizes new open source technologies that have become popular in geospatial web development, including components such as OpenLayers and GeoServer. This paper presents examples of water quality data analysis based on nutrient type, source, yield, and area of interest using the NYM tool for the Chesapeake Bay watershed. In addition, we describe examples of map-based techniques for identifying high and low nutrient yield areas; web map engines; and data visualization and data management techniques.","largerWorkTitle":"2009 17th International Conference on Geoinformatics, Geoinformatics 2009","conferenceTitle":"2009 17th International Conference on Geoinformatics, Geoinformatics 2009","conferenceDate":"12 August 2009 through 14 August 2009","conferenceLocation":"Fairfax, VA","language":"English","doi":"10.1109/GEOINFORMATICS.2009.5293397","isbn":"9781424445639","usgsCitation":"Mullinix, C., Hearn, P., Zhang, H., and Aguinaldo, J., 2009, Web-based decision support and visualization tools for water quality management in the Chesapeake Bay watershed, in 2009 17th International Conference on Geoinformatics, Geoinformatics 2009, Fairfax, VA, 12 August 2009 through 14 August 2009, https://doi.org/10.1109/GEOINFORMATICS.2009.5293397.","costCenters":[],"links":[{"id":244701,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216809,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1109/GEOINFORMATICS.2009.5293397"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bcfc4e4b08c986b32eac1","contributors":{"authors":[{"text":"Mullinix, C.","contributorId":71419,"corporation":false,"usgs":true,"family":"Mullinix","given":"C.","email":"","affiliations":[],"preferred":false,"id":443579,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hearn, P.","contributorId":73852,"corporation":false,"usgs":true,"family":"Hearn","given":"P.","email":"","affiliations":[],"preferred":false,"id":443580,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zhang, H.","contributorId":50311,"corporation":false,"usgs":true,"family":"Zhang","given":"H.","affiliations":[],"preferred":false,"id":443578,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Aguinaldo, J.","contributorId":24197,"corporation":false,"usgs":true,"family":"Aguinaldo","given":"J.","affiliations":[],"preferred":false,"id":443577,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70033840,"text":"70033840 - 2009 - Pore-water chemistry from the ICDP-USGS core hole in the Chesapeake Bay impact structure-Implications for paleohydrology, microbial habitat, and water resources","interactions":[],"lastModifiedDate":"2012-03-12T17:21:30","indexId":"70033840","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","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":"Pore-water chemistry from the ICDP-USGS core hole in the Chesapeake Bay impact structure-Implications for paleohydrology, microbial habitat, and water resources","docAbstract":"We investigated the groundwater system of the Chesapeake Bay impact structure by analyzing the pore-water chemistry in cores taken from a 1766-m-deep drill hole 10 km north of Cape Charles, Virginia. Pore water was extracted using high-speed centrifuges from over 100 cores sampled from a 1300 m section of the drill hole. The pore-water samples were analyzed for major cations and anions, stable isotopes of water and sulfate, dissolved and total carbon, and bioavailable iron. The results reveal a broad transition between freshwater and saline water from 100 to 500 m depth in the postimpact sediment section, and an underlying synimpact section that is almost entirely filled with brine. The presence of brine in the lowermost postimpact section and the trend in dissolved chloride with depth suggest a transport process dominated by molecular diffusion and slow, compaction-driven, upward flow. Major ion results indicate residual effects of diagenesis from heating, and a pre-impact origin for the brine. High levels of dissolved organic carbon (6-95 mg/L) and the distribution of electron acceptors indicate an environment that may be favorable for microbial activity throughout the drilled section. The concentration and extent of the brine is much greater than had previously been observed, suggesting that its occurrence may be common in the inner crater. However, groundwater-flow conditions in the structure may reduce the saltwater-intrusion hazard associated with the brine. ?? 2009 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":"10.1130/2009.2458(36)","issn":"00721077","usgsCitation":"Sanford, W., Voytek, M., Powars, D., Jones, B., Cozzarelli, I., Cockell, C., and Eganhouse, R., 2009, Pore-water chemistry from the ICDP-USGS core hole in the Chesapeake Bay impact structure-Implications for paleohydrology, microbial habitat, and water resources: Special Paper of the Geological Society of America, no. 458, p. 867-890, https://doi.org/10.1130/2009.2458(36).","startPage":"867","endPage":"890","numberOfPages":"24","costCenters":[],"links":[{"id":214442,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/2009.2458(36)"},{"id":242170,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"458","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7dd2e4b0c8380cd7a19f","contributors":{"authors":[{"text":"Sanford, W. E. 0000-0002-6624-0280","orcid":"https://orcid.org/0000-0002-6624-0280","contributorId":102112,"corporation":false,"usgs":true,"family":"Sanford","given":"W. E.","affiliations":[],"preferred":false,"id":442791,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Voytek, M.A.","contributorId":44272,"corporation":false,"usgs":true,"family":"Voytek","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":442787,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Powars, D.S.","contributorId":7303,"corporation":false,"usgs":true,"family":"Powars","given":"D.S.","affiliations":[],"preferred":false,"id":442785,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jones, B.F.","contributorId":52156,"corporation":false,"usgs":true,"family":"Jones","given":"B.F.","email":"","affiliations":[],"preferred":false,"id":442788,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Cozzarelli, I.M. 0000-0002-5123-1007","orcid":"https://orcid.org/0000-0002-5123-1007","contributorId":22343,"corporation":false,"usgs":true,"family":"Cozzarelli","given":"I.M.","affiliations":[],"preferred":false,"id":442786,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Cockell, C.S.","contributorId":66830,"corporation":false,"usgs":true,"family":"Cockell","given":"C.S.","email":"","affiliations":[],"preferred":false,"id":442789,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Eganhouse, R.P.","contributorId":67555,"corporation":false,"usgs":true,"family":"Eganhouse","given":"R.P.","email":"","affiliations":[],"preferred":false,"id":442790,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70034062,"text":"70034062 - 2009 - Effects of rodent community diversity and composition on prevalence of an endemic bacterial pathogen - Bartonella","interactions":[],"lastModifiedDate":"2021-03-16T14:18:05.607753","indexId":"70034062","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1004,"text":"Biodiversity","active":true,"publicationSubtype":{"id":10}},"title":"Effects of rodent community diversity and composition on prevalence of an endemic bacterial pathogen - Bartonella","docAbstract":"

By studying Bartonella prevalence in rodent communities from 23 geographic sites in the western United States and one site in northern Mexico, the present study focused on the effects of rodent community diversity (measured by richness and Shannon index) and composition on prevalence of Bartonella infections. The analysis showed negative correlations of Bartonella prevalence with rodent richness and Shannon index. Further, Bartonella prevalence varied among rodent genera/species. Three models were applied to explain the observations. (1) Within-species/genus transmission: Bartonella strains usually are host-specific and adding non-host species would decrease Bartonella prevalence in its principal host through reduction of host contact (encounter reduction); (2) Frequency-dependence: Adding hosts would decrease the proportion of all infected individuals in the community, resulting in a reduction in the number of contacts between susceptible and infected individuals that usually leads to transmission (transmission reduction); and (3) Dominant species effect: Dominant species, if not susceptible to Bartonellae, can constrain the abundance of susceptible hosts (susceptible host regulation). These mechanisms work in concert; and the level of Bartonella prevalence is an outcome of regulation of all of these mechanisms on the entire system.

","language":"English","publisher":"Taylor Francis","doi":"10.1080/14888386.2009.9712856","issn":"14888386","usgsCitation":"Bai, Y., Kosoy, M., Calisher, C., Cully, J., and Collinge, S., 2009, Effects of rodent community diversity and composition on prevalence of an endemic bacterial pathogen - Bartonella: Biodiversity, v. 10, no. 4, p. 3-11, https://doi.org/10.1080/14888386.2009.9712856.","productDescription":"9 p.","startPage":"3","endPage":"11","costCenters":[],"links":[{"id":384410,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"10","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a07b8e4b0c8380cd517c5","contributors":{"authors":[{"text":"Bai, Y.","contributorId":42784,"corporation":false,"usgs":true,"family":"Bai","given":"Y.","email":"","affiliations":[],"preferred":false,"id":443874,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kosoy, M.Y.","contributorId":78283,"corporation":false,"usgs":true,"family":"Kosoy","given":"M.Y.","email":"","affiliations":[],"preferred":false,"id":443877,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Calisher, C.H.","contributorId":34359,"corporation":false,"usgs":true,"family":"Calisher","given":"C.H.","email":"","affiliations":[],"preferred":false,"id":443873,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cully, J.F. Jr.","contributorId":51041,"corporation":false,"usgs":true,"family":"Cully","given":"J.F.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":443875,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Collinge, S.K.","contributorId":58832,"corporation":false,"usgs":true,"family":"Collinge","given":"S.K.","email":"","affiliations":[],"preferred":false,"id":443876,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70033777,"text":"70033777 - 2009 - Allogenic sedimentary components of Bear Lake, Utah and Idaho","interactions":[],"lastModifiedDate":"2012-03-12T17:21:30","indexId":"70033777","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","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":"Allogenic sedimentary components of Bear Lake, Utah and Idaho","docAbstract":"Bear Lake is a long-lived lake filling a tectonic depression between the Bear River Range to the west and the Bear River Plateau to the east, and straddling the border between Utah and Idaho. Mineralogy, elemental geochemistry, and magnetic properties provide information about variations in provenance of allogenic lithic material in last-glacial-age, quartz-rich sediment in Bear Lake. Grain-size data from the siliciclastic fraction of late-glacial to Holocene carbonate-rich sediments provide information about variations in lake level. For the quartz-rich lower unit, which was deposited while the Bear River fl owed into and out of the lake, four source areas are recognized on the basis of modern fluvial samples with contrasting properties that reflect differences in bedrock geology and in magnetite content from dust. One of these areas is underlain by hematite-rich Uinta Mountain Group rocks in the headwaters of the Bear River. Although Uinta Mountain Group rocks make up a small fraction of the catchment, hematite-rich material from this area is an important component of the lower unit. This material is interpreted to be glacial fl our. Variations in the input of glacial flour are interpreted as having caused quasi-cyclical variations in mineralogical and elemental concentrations, and in magnetic properties within the lower unit. The carbonate-rich younger unit was deposited under conditions similar to those of the modern lake, with the Bear River largely bypassing the lake. For two cores taken in more than 30 m of water, median grain sizes in this unit range from ???6 ??m to more than 30 ??m, with the coarsest grain sizes associated with beach or shallow-water deposits. Similar grain-size variations are observed as a function of water depth in the modern lake and provide the basis for interpreting the core grain-size data in terms of lake level. Copyright ?? 2009 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":"10.1130/2009.2450(06)","issn":"00721077","usgsCitation":"Rosenbaum, J.G., Dean, W., Reynolds, R.L., and Reheis, M., 2009, Allogenic sedimentary components of Bear Lake, Utah and Idaho: Special Paper of the Geological Society of America, no. 450, p. 145-168, https://doi.org/10.1130/2009.2450(06).","startPage":"145","endPage":"168","numberOfPages":"24","costCenters":[],"links":[{"id":242132,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214409,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/2009.2450(06)"}],"issue":"450","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e96de4b0c8380cd4829a","contributors":{"authors":[{"text":"Rosenbaum, J. G.","contributorId":96685,"corporation":false,"usgs":true,"family":"Rosenbaum","given":"J.","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":442404,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dean, W.E.","contributorId":97099,"corporation":false,"usgs":true,"family":"Dean","given":"W.E.","email":"","affiliations":[],"preferred":false,"id":442405,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Reynolds, R. L. 0000-0002-4572-2942","orcid":"https://orcid.org/0000-0002-4572-2942","contributorId":79885,"corporation":false,"usgs":true,"family":"Reynolds","given":"R.","middleInitial":"L.","affiliations":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"preferred":true,"id":442403,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Reheis, M.C. 0000-0002-8359-323X","orcid":"https://orcid.org/0000-0002-8359-323X","contributorId":36128,"corporation":false,"usgs":true,"family":"Reheis","given":"M.C.","affiliations":[],"preferred":false,"id":442402,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70034497,"text":"70034497 - 2009 - Factors influencing densities of non-indigenous species in the ballast water of ships arriving at ports in Puget Sound, Washington, United States","interactions":[],"lastModifiedDate":"2012-03-12T17:21:40","indexId":"70034497","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":862,"text":"Aquatic Conservation: Marine and Freshwater Ecosystems","active":true,"publicationSubtype":{"id":10}},"title":"Factors influencing densities of non-indigenous species in the ballast water of ships arriving at ports in Puget Sound, Washington, United States","docAbstract":"Oceanographic characteristics and the presence of international shipping in Puget Sound, Washington, USA contribute to its vulnerability to non-indigenous species (NIS) invasions. To evaluate NIS arriving in ballast water, zooplankton was sampled in 380 ballast tanks of ships after they entered Puget Sound. Taxa were classified into a higher risk group of coastal organisms (including known NIS), and a lower risk group of largely oceanic species. Most ships reported conducting mid-ocean ballast water exchange (BWE). However, despite state regulations requiring BWE, and apparent compliance by ship operators, most sampled tanks from both transpacific and coastal routes had coastal zooplankton densities exceeding internationally proposed discharge standards. BWE efficiency models and controlled before-and-after BWE experiments indicate that BWE consistently removes most coastal zooplankton. However, this study found that although the empty-refill method of BWE significantly reduced coastal plankton compared with un-exchanged tanks, the flow-through method did not, and in either case remaining coastal plankton densities presented appreciable risks of introducing NIS. Densities of high risk taxa were consistently and significantly higher from US domestic trips dominated by tank ships carrying ballast water from California, and lower in samples from trans-Pacific trips dominated by container ships and bulk carriers with ballast from Asia. These findings are probably a result of the dense and diverse NIS assemblages present in California and other US west coast estuaries and the comparatively short transit times between them and Puget Sound. While it appears that BWE can effectively replace NIS with less risky ocean species, new reporting, verification, and operational procedures may be necessary to enhance BWE efficacy. In the long-term, the introduction of ballast water treatment technologies may be required to significantly reduce the discharge of risky organisms from commercial ships if BWE practices do not become more effective. Copyright ?? 2008 John Wiley & Sons, Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Aquatic Conservation: Marine and Freshwater Ecosystems","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/aqc.986","issn":"10527613","usgsCitation":"Cordell, J., Lawrence, D.J., Ferm, N., Tear, L., Smith, S., and Herwig, R., 2009, Factors influencing densities of non-indigenous species in the ballast water of ships arriving at ports in Puget Sound, Washington, United States: Aquatic Conservation: Marine and Freshwater Ecosystems, v. 19, no. 3, p. 322-343, https://doi.org/10.1002/aqc.986.","startPage":"322","endPage":"343","numberOfPages":"22","costCenters":[],"links":[{"id":215621,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/aqc.986"},{"id":243437,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"19","issue":"3","noUsgsAuthors":false,"publicationDate":"2008-10-27","publicationStatus":"PW","scienceBaseUri":"505a0ec3e4b0c8380cd535f8","contributors":{"authors":[{"text":"Cordell, J.R.","contributorId":108333,"corporation":false,"usgs":true,"family":"Cordell","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":446084,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lawrence, D. J.","contributorId":84952,"corporation":false,"usgs":false,"family":"Lawrence","given":"D.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":446083,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ferm, N.C.","contributorId":32748,"corporation":false,"usgs":true,"family":"Ferm","given":"N.C.","email":"","affiliations":[],"preferred":false,"id":446079,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Tear, L.M.","contributorId":70614,"corporation":false,"usgs":true,"family":"Tear","given":"L.M.","email":"","affiliations":[],"preferred":false,"id":446082,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Smith, S.S.","contributorId":65610,"corporation":false,"usgs":true,"family":"Smith","given":"S.S.","email":"","affiliations":[],"preferred":false,"id":446081,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Herwig, R.P.","contributorId":56468,"corporation":false,"usgs":true,"family":"Herwig","given":"R.P.","email":"","affiliations":[],"preferred":false,"id":446080,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70169857,"text":"70169857 - 2009 - Systematic approaches to comprehensive analyses of natural organic matter","interactions":[],"lastModifiedDate":"2016-06-21T13:13:02","indexId":"70169857","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":791,"text":"Annals of Environmental Science","active":true,"publicationSubtype":{"id":10}},"title":"Systematic approaches to comprehensive analyses of natural organic matter","docAbstract":"

The more that is learned of the chemistry of aquatic natural organic matter (NOM) the greater is the scientific appreciation of the vast complexity of this subject. This complexity is due not only to a multiplicity of precursor molecules in any environment but to their associations with each other and with other components of local environments such as clays, mineral acids and dissolved metals. In addition, this complex system is subject to constant change owing to environmental variables and microbial action. Thus, there is a good argument that no two NOM samples are exactly the same even from the same source at nearly the same time. When ubiquity of occurrence, reaction with water treatment chemicals, and subsequent human exposure are added to the list of NOM issues, one can understand the appeal that this subject holds for a wide variety of environmental scientists.

","language":"English","publisher":"Northeastern University","usgsCitation":"Leenheer, J.A., 2009, Systematic approaches to comprehensive analyses of natural organic matter: Annals of Environmental Science, v. 3, p. 1-130.","productDescription":"130 p.","startPage":"1","endPage":"130","onlineOnly":"N","additionalOnlineFiles":"N","ipdsId":"IP-010246","costCenters":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"links":[{"id":324107,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://hdl.handle.net/2047/d10017392"},{"id":324108,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"3","publishingServiceCenter":{"id":2,"text":"Denver PSC"},"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"576a654ce4b07657d1a11e8f","contributors":{"authors":[{"text":"Leenheer, Jerry A.","contributorId":72420,"corporation":false,"usgs":true,"family":"Leenheer","given":"Jerry","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":640054,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70034286,"text":"70034286 - 2009 - First-order exchange coefficient coupling for simulating surface water-groundwater interactions: Parameter sensitivity and consistency with a physics-based approach","interactions":[],"lastModifiedDate":"2012-03-12T17:21:46","indexId":"70034286","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1924,"text":"Hydrological Processes","active":true,"publicationSubtype":{"id":10}},"title":"First-order exchange coefficient coupling for simulating surface water-groundwater interactions: Parameter sensitivity and consistency with a physics-based approach","docAbstract":"Distributed hydrologic models capable of simulating fully-coupled surface water and groundwater flow are increasingly used to examine problems in the hydrologic sciences. Several techniques are currently available to couple the surface and subsurface; the two most frequently employed approaches are first-order exchange coefficients (a.k.a., the surface conductance method) and enforced continuity of pressure and flux at the surface-subsurface boundary condition. The effort reported here examines the parameter sensitivity of simulated hydrologic response for the first-order exchange coefficients at a well-characterized field site using the fully coupled Integrated Hydrology Model (InHM). This investigation demonstrates that the first-order exchange coefficients can be selected such that the simulated hydrologic response is insensitive to the parameter choice, while simulation time is considerably reduced. Alternatively, the ability to choose a first-order exchange coefficient that intentionally decouples the surface and subsurface facilitates concept-development simulations to examine real-world situations where the surface-subsurface exchange is impaired. While the parameters comprising the first-order exchange coefficient cannot be directly estimated or measured, the insensitivity of the simulated flow system to these parameters (when chosen appropriately) combined with the ability to mimic actual physical processes suggests that the first-order exchange coefficient approach can be consistent with a physics-based framework. Copyright ?? 2009 John Wiley & Sons, Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrological Processes","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/hyp.7279","issn":"08856087","usgsCitation":"Ebel, B., Mirus, B., Heppner, C., VanderKwaak, J., and Loague, K., 2009, First-order exchange coefficient coupling for simulating surface water-groundwater interactions: Parameter sensitivity and consistency with a physics-based approach: Hydrological Processes, v. 23, no. 13, p. 1949-1959, https://doi.org/10.1002/hyp.7279.","startPage":"1949","endPage":"1959","numberOfPages":"11","costCenters":[],"links":[{"id":244586,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":216700,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/hyp.7279"}],"volume":"23","issue":"13","noUsgsAuthors":false,"publicationDate":"2009-03-30","publicationStatus":"PW","scienceBaseUri":"505a106ce4b0c8380cd53c77","contributors":{"authors":[{"text":"Ebel, B.A.","contributorId":87772,"corporation":false,"usgs":true,"family":"Ebel","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":445085,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mirus, B.B.","contributorId":68128,"corporation":false,"usgs":true,"family":"Mirus","given":"B.B.","affiliations":[],"preferred":false,"id":445083,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Heppner, C.S.","contributorId":37147,"corporation":false,"usgs":true,"family":"Heppner","given":"C.S.","affiliations":[],"preferred":false,"id":445082,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"VanderKwaak, J.E.","contributorId":103497,"corporation":false,"usgs":true,"family":"VanderKwaak","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":445086,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Loague, K.","contributorId":77307,"corporation":false,"usgs":true,"family":"Loague","given":"K.","affiliations":[],"preferred":false,"id":445084,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70034501,"text":"70034501 - 2009 - Detecting declines in the abundance of a bull trout (Salvelinus confluentus) population: Understanding the accuracy, precision, and costs of our efforts","interactions":[],"lastModifiedDate":"2012-03-12T17:21:39","indexId":"70034501","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","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":"Detecting declines in the abundance of a bull trout (Salvelinus confluentus) population: Understanding the accuracy, precision, and costs of our efforts","docAbstract":"Using empirical field data for bull trout (Salvelinus confluentus), we evaluated the trade-off between power and sampling effort-cost using Monte Carlo simulations of commonly collected mark-recapture-resight and count data, and we estimated the power to detect changes in abundance across different time intervals. We also evaluated the effects of monitoring different components of a population and stratification methods on the precision of each method. Our results illustrate substantial variability in the relative precision, cost, and information gained from each approach. While grouping estimates by age or stage class substantially increased the precision of estimates, spatial stratification of sampling units resulted in limited increases in precision. Although mark-resight methods allowed for estimates of abundance versus indices of abundance, our results suggest snorkel surveys may be a more affordable monitoring approach across large spatial scales. Detecting a 25% decline in abundance after 5 years was not possible, regardless of technique (power = 0.80), without high sampling effort (48% of study site). Detecting a 25% decline was possible after 15 years, but still required high sampling efforts. Our results suggest detecting moderate changes in abundance of freshwater salmonids requires considerable resource and temporal commitments and highlight the difficulties of using abundance measures for monitoring bull trout populations.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Canadian Journal of Fisheries and Aquatic Sciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1139/F09-026","issn":"0706652X","usgsCitation":"Al-Chokhachy, R., Budy, P., and Conner, M., 2009, Detecting declines in the abundance of a bull trout (Salvelinus confluentus) population: Understanding the accuracy, precision, and costs of our efforts: Canadian Journal of Fisheries and Aquatic Sciences, v. 66, no. 4, p. 649-658, https://doi.org/10.1139/F09-026.","startPage":"649","endPage":"658","numberOfPages":"10","costCenters":[],"links":[{"id":243504,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":215683,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1139/F09-026"}],"volume":"66","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ff60e4b0c8380cd4f159","contributors":{"authors":[{"text":"Al-Chokhachy, R.","contributorId":42431,"corporation":false,"usgs":true,"family":"Al-Chokhachy","given":"R.","affiliations":[],"preferred":false,"id":446097,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Budy, P.","contributorId":68091,"corporation":false,"usgs":true,"family":"Budy","given":"P.","affiliations":[],"preferred":false,"id":446098,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Conner, M.","contributorId":71787,"corporation":false,"usgs":true,"family":"Conner","given":"M.","email":"","affiliations":[],"preferred":false,"id":446099,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70034288,"text":"70034288 - 2009 - Climatic extremes improve predictions of spatial patterns of tree species","interactions":[],"lastModifiedDate":"2012-03-12T17:21:46","indexId":"70034288","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Climatic extremes improve predictions of spatial patterns of tree species","docAbstract":"Understanding niche evolution, dynamics, and the response of species to climate change requires knowledge of the determinants of the environmental niche and species range limits. Mean values of climatic variables are often used in such analyses. In contrast, the increasing frequency of climate extremes suggests the importance of understanding their additional influence on range limits. Here, we assess how measures representing climate extremes (i.e., interannual variability in climate parameters) explain and predict spatial patterns of 11 tree species in Switzerland. We find clear, although comparably small, improvement (+20% in adjusted D2, +8% and +3% in cross-validated True Skill Statistic and area under the receiver operating characteristics curve values) in models that use measures of extremes in addition to means. The primary effect of including information on climate extremes is a correction of local overprediction and underprediction. Our results demonstrate that measures of climate extremes are important for understanding the climatic limits of tree species and assessing species niche characteristics. The inclusion of climate variability likely will improve models of species range limits under future conditions, where changes in mean climate and increased variability are expected.","largerWorkTitle":"Proceedings of the National Academy of Sciences of the United States of America","language":"English","doi":"10.1073/pnas.0901643106","issn":"00278424","usgsCitation":"Zimmermann, N., Yoccoz, N.G., Edwards, T., Meier, E., Thuiller, W., Guisan, A., Schmatz, D., and Pearman, P., 2009, Climatic extremes improve predictions of spatial patterns of tree species, in Proceedings of the National Academy of Sciences of the United States of America, v. 106, no. SUPPL. 2, p. 19723-19728, https://doi.org/10.1073/pnas.0901643106.","startPage":"19723","endPage":"19728","numberOfPages":"6","costCenters":[],"links":[{"id":476224,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://www.ncbi.nlm.nih.gov/pmc/articles/2780931","text":"External Repository"},{"id":216733,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1073/pnas.0901643106"},{"id":244619,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"106","issue":"SUPPL. 2","noUsgsAuthors":false,"publicationDate":"2009-11-17","publicationStatus":"PW","scienceBaseUri":"5059f664e4b0c8380cd4c72f","contributors":{"authors":[{"text":"Zimmermann, N.E.","contributorId":24547,"corporation":false,"usgs":true,"family":"Zimmermann","given":"N.E.","email":"","affiliations":[],"preferred":false,"id":445092,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Yoccoz, Nigel G.","contributorId":61537,"corporation":false,"usgs":true,"family":"Yoccoz","given":"Nigel","email":"","middleInitial":"G.","affiliations":[{"id":33046,"text":"Norwegian Institute for Nature Research","active":true,"usgs":false}],"preferred":false,"id":445094,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Edwards, T.C. Jr. 0000-0002-0773-0909","orcid":"https://orcid.org/0000-0002-0773-0909","contributorId":76486,"corporation":false,"usgs":true,"family":"Edwards","given":"T.C.","suffix":"Jr.","affiliations":[],"preferred":false,"id":445096,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Meier, E.S.","contributorId":102713,"corporation":false,"usgs":true,"family":"Meier","given":"E.S.","email":"","affiliations":[],"preferred":false,"id":445097,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Thuiller, W.","contributorId":73034,"corporation":false,"usgs":true,"family":"Thuiller","given":"W.","affiliations":[],"preferred":false,"id":445095,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Guisan, Antoine","contributorId":47943,"corporation":false,"usgs":true,"family":"Guisan","given":"Antoine","email":"","affiliations":[],"preferred":false,"id":445093,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Schmatz, D.R.","contributorId":6694,"corporation":false,"usgs":true,"family":"Schmatz","given":"D.R.","email":"","affiliations":[],"preferred":false,"id":445091,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Pearman, P.B.","contributorId":105559,"corporation":false,"usgs":true,"family":"Pearman","given":"P.B.","email":"","affiliations":[],"preferred":false,"id":445098,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ,{"id":70033232,"text":"70033232 - 2009 - The structure and stability of aqueous rare-earth elements in hydrothermal fluids: New results on neodymium(III) aqua and chloroaqua complexes in aqueous solutions to 500 °C and 520 MPa","interactions":[],"lastModifiedDate":"2015-03-23T16:02:32","indexId":"70033232","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1213,"text":"Chemical Geology","active":true,"publicationSubtype":{"id":10}},"title":"The structure and stability of aqueous rare-earth elements in hydrothermal fluids: New results on neodymium(III) aqua and chloroaqua complexes in aqueous solutions to 500 °C and 520 MPa","docAbstract":"X-ray absorption spectroscopy (XAS) measurements were made at the Nd L3-edge on neodymium(III) aqua and chloroaqua complexes in low pH aqueous solutions from 25 to 500????C and up to 520??MPa. Analysis of the extended X-ray absorption fine structure of the XAS spectra measured from a 0.07??m Nd/0.16??m HNO3 aqueous solution reveals a contraction of the Nd-O distance of the Nd3+ aqua ion at a uniform rate of ~ 0.013????/100????C and a uniform reduction of the number of coordinated H2O molecules from 10.0 ?? 0.9 to 7.4 ?? 0.9 over the range from 25 to 500????C and up to 370??MPa. The rate of reduction of the first-shell water molecules with temperature for Nd3+ (26%) is intermediate between the rate for the Gd3+ aqua ion (22% from 25 to 500????C) and the rates for the Eu3+ (29% from 25 to 400????C) and the Yb3+ aqua ions (42% from 25 to 500????C) indicating an intermediate stability of the Nd3+ aqua ion consistent with the tetrad effect. Nd L3-edge XAS measurements of 0.05??m NdCl3 aqueous solution at 25 to 500????C and up to 520??MPa show that stepwise inner-sphere complexes most likely of the type Nd(H2O)?? - nCln+3 - n occur in the solution at elevated temperatures, where ?? ??? 9 at 150????C decreasing to ~ 6 at 500????C and the number of chloride ions (n) of the chloroaqua complexes increases uniformly with temperature from 1.2 ?? 0.2 to 2.0 ?? 0.2 in the solution upon increase of temperature from 150 to 500????C. Conversely, the number of H2O ligands of Nd(H2O)?? - nCln+3 - n complexes is uniformly reduced with temperature from 7.5 ?? 0.8 to 3.7 ?? 0.3 in the aqueous solution, in the same temperature range. These data show greater stability of neodymium(III) than gadolinium(III) and ytterbium(III) chloride complexes in low pH aqueous solutions at elevated temperatures. Our data suggest a greater stability of aqueous light REE than that of heavy REE chloride complexes in low pH fluids at elevated temperatures consistent with REE analysis of fluids from deep-sea hydrothermal vents. ?? 2008 Elsevier B.V.","language":"English","publisher":"Elsevier","doi":"10.1016/j.chemgeo.2008.08.011","issn":"00092","usgsCitation":"Mayanovic, R.A., Anderson, A.J., Bassett, W.A., and Chou, I., 2009, The structure and stability of aqueous rare-earth elements in hydrothermal fluids: New results on neodymium(III) aqua and chloroaqua complexes in aqueous solutions to 500 °C and 520 MPa: Chemical Geology, v. 259, no. 1-2, p. 30-38, https://doi.org/10.1016/j.chemgeo.2008.08.011.","productDescription":"9 p.","startPage":"30","endPage":"38","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":240923,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213311,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.chemgeo.2008.08.011"}],"volume":"259","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb097e4b08c986b324f59","contributors":{"authors":[{"text":"Mayanovic, Robert A.","contributorId":88528,"corporation":false,"usgs":true,"family":"Mayanovic","given":"Robert","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":439948,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Anderson, Alan J.","contributorId":28770,"corporation":false,"usgs":true,"family":"Anderson","given":"Alan","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":439945,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bassett, William A.","contributorId":47533,"corporation":false,"usgs":true,"family":"Bassett","given":"William","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":439947,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Chou, I.-M. 0000-0001-5233-6479","orcid":"https://orcid.org/0000-0001-5233-6479","contributorId":44283,"corporation":false,"usgs":true,"family":"Chou","given":"I.-M.","affiliations":[{"id":245,"text":"Eastern Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":false,"id":439946,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70178325,"text":"70178325 - 2009 - Improving conceptual models of water and carbon transfer through peat","interactions":[],"lastModifiedDate":"2016-11-15T14:31:32","indexId":"70178325","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Improving conceptual models of water and carbon transfer through peat","docAbstract":"

Northern peatlands store 500 × 1015 g of organic carbon and are very sensitive to climate change. There is a strong conceptual model of sources, sinks, and pathways of carbon within peatlands, but challenges remain both in understanding the hydrogeology and the linkages between carbon cycling and peat pore water flow. In this chapter, research findings from the glacial Lake Agassiz peatlands are used to develop a conceptual framework for peatland hydrogeology and identify four challenges related to northern peatlands yet to be addressed: (1) develop a better understanding of the extent and net impact of climate-driven groundwater flushing in peatlands; (2) quantify the complexities of heterogeneity on pore water flow and, in particular, reconcile contradictions between peatland hydrogeologic interpretations and isotopic data; (3) understand the hydrogeologic implications of free-phase methane production, entrapment, and release in peatlands; and (4) quantify the impact of arctic and subarctic warming on peatland hydrogeology and its linkage to carbon cycling.

","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Carbon cycling in northern peatlands: Geophysical Monograph Series","largerWorkSubtype":{"id":15,"text":"Monograph"},"language":"English","publisher":"American Geophysical Union","usgsCitation":"McKenzie, J.M., Siegel, D., and Rosenberry, D.O., 2009, Improving conceptual models of water and carbon transfer through peat, chap. of Carbon cycling in northern peatlands: Geophysical Monograph Series, p. 265-275.","productDescription":"11 p.","startPage":"265","endPage":"275","ipdsId":"IP-011017","costCenters":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"links":[{"id":331028,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":331027,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://onlinelibrary.wiley.com/doi/10.1029/2008GM000821/summary"}],"publishingServiceCenter":{"id":2,"text":"Denver PSC"},"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"582c2ce7e4b0c253be072c10","contributors":{"editors":[{"text":"Baird, Andrew J.","contributorId":176877,"corporation":false,"usgs":false,"family":"Baird","given":"Andrew","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":653872,"contributorType":{"id":2,"text":"Editors"},"rank":1},{"text":"Belyea, Lisa R.","contributorId":176878,"corporation":false,"usgs":false,"family":"Belyea","given":"Lisa","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":653873,"contributorType":{"id":2,"text":"Editors"},"rank":2},{"text":"Comas, Xavier","contributorId":176879,"corporation":false,"usgs":false,"family":"Comas","given":"Xavier","affiliations":[],"preferred":false,"id":653874,"contributorType":{"id":2,"text":"Editors"},"rank":3},{"text":"Reeve, A.S.","contributorId":64446,"corporation":false,"usgs":true,"family":"Reeve","given":"A.S.","email":"","affiliations":[],"preferred":false,"id":653875,"contributorType":{"id":2,"text":"Editors"},"rank":4},{"text":"Slater, Lee D.","contributorId":95792,"corporation":false,"usgs":true,"family":"Slater","given":"Lee","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":653876,"contributorType":{"id":2,"text":"Editors"},"rank":5}],"authors":[{"text":"McKenzie, Jeffery M.","contributorId":85068,"corporation":false,"usgs":true,"family":"McKenzie","given":"Jeffery","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":653596,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Siegel, Donald I.","contributorId":97499,"corporation":false,"usgs":true,"family":"Siegel","given":"Donald I.","affiliations":[],"preferred":false,"id":653595,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rosenberry, Donald O. 0000-0003-0681-5641 rosenber@usgs.gov","orcid":"https://orcid.org/0000-0003-0681-5641","contributorId":1312,"corporation":false,"usgs":true,"family":"Rosenberry","given":"Donald","email":"rosenber@usgs.gov","middleInitial":"O.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":653594,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70193768,"text":"70193768 - 2009 - Combined use of frequency‐domain electromagnetic and electrical resistivity surveys to delineate the freshwater/saltwater interface near saline lakes in the Nebraska Sand Hills, Nebraska, USA","interactions":[],"lastModifiedDate":"2020-03-10T14:48:26","indexId":"70193768","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"seriesTitle":{"id":5547,"text":"Proceedings of SAGEEP (Symposium on the Application of Geophysics to Engineering and Environmental Problems)","printIssn":"1554-8015","active":true,"publicationSubtype":{"id":19}},"title":"Combined use of frequency‐domain electromagnetic and electrical resistivity surveys to delineate the freshwater/saltwater interface near saline lakes in the Nebraska Sand Hills, Nebraska, USA","docAbstract":"
We investigate the use of frequency‐domain electromagnetic (FDEM) and electrical resistivity (ER) surveys for rapid and detailed characterization of the direction of lake‐aquifer fluxes and the configuration of salt plumes generated from saline lakes. This methodology was developed and applied at several lakes in the Nebraska Sand Hills, Nebraska, in an area with both freshwater and saline lakes hydraulically connected to the freshwater surficial aquifer. The FDEM survey was conducted by mounting the instrument on a fiberglass cart towed by an all‐terrain vehicle. The towed FDEM surveys covered about 25 km per day and served as a reconnaissance method for choosing locations for the more quantitative and detailed ER surveys. Around the saline lakes, areas with high electrical conductivity are consistent with the regional direction of ground‐water flow. Lower electrical conductivity was measured around the freshwater lakes with anomalies correlating to a paleovalley axis inferred from previous studies. The efficacy of this geophysical approach is attributed to: (1) significant contrast in electrical conductivity between freshwater and saltwater, (2) near‐surface location of the freshwater/saltwater interface, (3) minimal cultural interference, and (4) relative homogeneity of the aquifer materials.
","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Proceedings of the Symposium on the Application of Geophysics to Engineering and Environmental Problems 2009","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"Symposium on the Application of Geophysics to Engineering and Environmental Problems 2009","conferenceDate":"March 29 - April 2, 2009","conferenceLocation":"Fort Worth, TX","language":"English","publisher":"Environment and Engineering Geophysical Society","doi":"10.4133/1.3176693","issn":"1554-8015","isbn":"9781615670512","usgsCitation":"Ong, J., White, E.A., Lane, J.W., Halihan, T., and Zlotnik, V., 2009, Combined use of frequency‐domain electromagnetic and electrical resistivity surveys to delineate the freshwater/saltwater interface near saline lakes in the Nebraska Sand Hills, Nebraska, USA, in Proceedings of the Symposium on the Application of Geophysics to Engineering and Environmental Problems 2009, Fort Worth, TX, March 29 - April 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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":721524,"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":721525,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Halihan, Todd","contributorId":199907,"corporation":false,"usgs":false,"family":"Halihan","given":"Todd","email":"","affiliations":[{"id":34731,"text":"Oklahoma State University, Stillwater, OK","active":true,"usgs":false}],"preferred":false,"id":721526,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Zlotnik, Vitaly A","contributorId":191371,"corporation":false,"usgs":false,"family":"Zlotnik","given":"Vitaly A","affiliations":[{"id":12505,"text":"University of Nebraska - Lincoln","active":true,"usgs":false}],"preferred":false,"id":721527,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70035932,"text":"70035932 - 2009 - Nicotine, acetanilide and urea multi-level2H-,13C- and15N-abundance reference materials for continuous-flow isotope ratio mass spectrometry","interactions":[],"lastModifiedDate":"2012-03-12T17:21:48","indexId":"70035932","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3233,"text":"Rapid Communications in Mass Spectrometry","active":true,"publicationSubtype":{"id":10}},"title":"Nicotine, acetanilide and urea multi-level2H-,13C- and15N-abundance reference materials for continuous-flow isotope ratio mass spectrometry","docAbstract":"Accurate determinations of stable isotope ratios require a calibration using at least two reference materials with different isotopic compositions to anchor the isotopic scale and compensate for differences in machine slope. Ideally, the S values of these reference materials should bracket the isotopic range of samples with unknown S values. While the practice of analyzing two isotopically distinct reference materials is common for water (VSMOW-SLAP) and carbonates (NBS 19 and L-SVEC), the lack of widely available organic reference materials with distinct isotopic composition has hindered the practice when analyzing organic materials by elemental analysis/isotope ratio mass spectrometry (EA-IRMS). At present only L-glutamic acids USGS40 and USGS41 satisfy these requirements for ??13C and ??13N, with the limitation that L-glutamic acid is not suitable for analysis by gas chromatography (GC). We describe the development and quality testing of (i) four nicotine laboratory reference materials for on-line (i.e. continuous flow) hydrogen reductive gas chromatography-isotope ratio mass-spectrometry (GC-IRMS), (ii) five nicotines for oxidative C, N gas chromatography-combustion-isotope ratio mass-spectrometry (GC-C-IRMS, or GC-IRMS), and (iii) also three acetanilide and three urea reference materials for on-line oxidative EA-IRMS for C and N. Isotopic off-line calibration against international stable isotope measurement standards at Indiana University adhered to the 'principle of identical treatment'. The new reference materials cover the following isotopic ranges: ??2Hnicotine -162 to -45%o, ??13Cnicotine -30.05 to +7.72%, ?? 15Nnicotine -6.03 to +33.62%; ??15N acetanilide +1-18 to +40.57%; ??13Curea -34.13 to +11.71%, ??15Nurea +0.26 to +40.61% (recommended ?? values refer to calibration with NBS 19, L-SVEC, IAEA-N-1, and IAEA-N-2). Nicotines fill a gap as the first organic nitrogen stable isotope reference materials for GC-IRMS that are available with different ??13N values. Comparative ??13C and ??15N on-line EA-IRMS data from 14 volunteering laboratories document the usefulness and reliability of acetanilides and ureas as EA-IRMS reference materials.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Rapid Communications in Mass Spectrometry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/rcm.4277","issn":"09514198","usgsCitation":"Schimmelmann, A., Albertino, A., Sauer, P., Qi, H., Molinie, R., and Mesnard, F., 2009, Nicotine, acetanilide and urea multi-level2H-,13C- and15N-abundance reference materials for continuous-flow isotope ratio mass spectrometry: Rapid Communications in Mass Spectrometry, v. 23, no. 22, p. 3513-3521, https://doi.org/10.1002/rcm.4277.","startPage":"3513","endPage":"3521","numberOfPages":"9","costCenters":[],"links":[{"id":216474,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/rcm.4277"},{"id":244345,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"22","noUsgsAuthors":false,"publicationDate":"2009-10-20","publicationStatus":"PW","scienceBaseUri":"505a6652e4b0c8380cd72d73","contributors":{"authors":[{"text":"Schimmelmann, A.","contributorId":28348,"corporation":false,"usgs":false,"family":"Schimmelmann","given":"A.","affiliations":[],"preferred":false,"id":453189,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Albertino, A.","contributorId":43597,"corporation":false,"usgs":true,"family":"Albertino","given":"A.","email":"","affiliations":[],"preferred":false,"id":453191,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Sauer, P.E.","contributorId":76335,"corporation":false,"usgs":true,"family":"Sauer","given":"P.E.","email":"","affiliations":[],"preferred":false,"id":453192,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Qi, H.","contributorId":107910,"corporation":false,"usgs":true,"family":"Qi","given":"H.","affiliations":[],"preferred":false,"id":453194,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Molinie, R.","contributorId":105557,"corporation":false,"usgs":true,"family":"Molinie","given":"R.","email":"","affiliations":[],"preferred":false,"id":453193,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Mesnard, F.","contributorId":30480,"corporation":false,"usgs":true,"family":"Mesnard","given":"F.","email":"","affiliations":[],"preferred":false,"id":453190,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70035821,"text":"70035821 - 2009 - Sources of land-derived runoff to a coral reef-fringed embayment identified using geochemical tracers in nearshore sediment traps","interactions":[],"lastModifiedDate":"2017-11-05T09:13:21","indexId":"70035821","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1587,"text":"Estuarine, Coastal and Shelf Science","active":true,"publicationSubtype":{"id":10}},"title":"Sources of land-derived runoff to a coral reef-fringed embayment identified using geochemical tracers in nearshore sediment traps","docAbstract":"Geochemical tracers, including Ba, Co, Th, 7Be, 137Cs and 210Pb, and magnetic properties were used to characterize terrestrial runoff collected in nearshore time-series sediment traps in Hanalei Bay, Kauai, during flood and dry conditions in summer 2006, and to fingerprint possible runoff sources in the lower watershed. In combination, the tracers indicate that runoff during a flood in August could have come from cultivated taro fields bordering the lower reach of the river. Land-based runoff associated with summer floods may have a greater impact on coral reef communities in Hanalei Bay than in winter because sediment persists for several months. During dry periods, sediment carried by the Hanalei River appears to have been mobilized primarily by undercutting of low 7Be, low 137Cs riverbanks composed of soil weathered from tholeiitic basalt with low Ba and Co concentrations. Following a moderate rainfall event in September, high 7Be sediment carried by the Hanalei River was probably mobilized by overland flow in the upper watershed. Ba-desorption in low-salinity coastal water limited its use to a qualitative runoff tracer in nearshore sediment. 210Pb had limited usefulness as a terrestrial tracer in the nearshore due to a large dissolved oceanic source and scavenging onto resuspended bottom sediment. 210Pb-scavenging does, however, illustrate the role resuspension could play in the accumulation of particle-reactive contaminants in nearshore sediment. Co and 137Cs were not affected by desorption or geochemical scavenging and showed the greatest potential as quantitative sediment provenance indicators in material collected in nearshore sediment traps.","language":"English","publisher":"Elsevier","doi":"10.1016/j.ecss.2009.09.014","issn":"02727714","usgsCitation":"Takesue, R.K., Bothner, M., and Reynolds, R.L., 2009, Sources of land-derived runoff to a coral reef-fringed embayment identified using geochemical tracers in nearshore sediment traps: Estuarine, Coastal and Shelf Science, v. 85, no. 3, p. 459-471, https://doi.org/10.1016/j.ecss.2009.09.014.","startPage":"459","endPage":"471","numberOfPages":"13","costCenters":[],"links":[{"id":476247,"rank":1,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://hdl.handle.net/1912/3091","text":"External Repository"},{"id":243956,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"85","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b937ee4b08c986b31a4fe","contributors":{"authors":[{"text":"Takesue, Renee K. 0000-0003-1205-0825 rtakesue@usgs.gov","orcid":"https://orcid.org/0000-0003-1205-0825","contributorId":2159,"corporation":false,"usgs":true,"family":"Takesue","given":"Renee","email":"rtakesue@usgs.gov","middleInitial":"K.","affiliations":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":452575,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bothner, Michael H. mbothner@usgs.gov","contributorId":139855,"corporation":false,"usgs":true,"family":"Bothner","given":"Michael H.","email":"mbothner@usgs.gov","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":452576,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Reynolds, Richard L. 0000-0002-4572-2942 rreynolds@usgs.gov","orcid":"https://orcid.org/0000-0002-4572-2942","contributorId":441,"corporation":false,"usgs":true,"family":"Reynolds","given":"Richard","email":"rreynolds@usgs.gov","middleInitial":"L.","affiliations":[{"id":271,"text":"Federal Center","active":false,"usgs":true}],"preferred":true,"id":452577,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70035482,"text":"70035482 - 2009 - Influences of high-flow events on a stream channel altered by construction of a highway bridge: A case study","interactions":[],"lastModifiedDate":"2017-05-10T15:06:53","indexId":"70035482","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2898,"text":"Northeastern Naturalist","active":true,"publicationSubtype":{"id":10}},"title":"Influences of high-flow events on a stream channel altered by construction of a highway bridge: A case study","docAbstract":"

Impacts of highway construction on streams in the central Appalachians are a growing concern as new roads are created to promote tourism and economic development in the area. Alterations to the streambed of a first-order stream, Sauerkraut Run, Hardy County, WV, during construction of a highway overpass included placement and removal of a temporary culvert, straightening and regrading of a section of stream channel, and armourment of a bank with a reinforced gravel berm. We surveyed longitudinal profiles and cross sections in a reference reach and the altered reach of Sauerkraut Run from 2003 through 2007 to measure physical changes in the streambed. During the four-year period, three high-flow events changed the streambed downstream of construction including channel widening and aggradation and then degradation of the streambed. Upstream of construction, at a reinforced gravel berm, bank erosion was documented. The reference section remained relatively unchanged. Knowledge gained by documenting channel changes in response to natural and anthropogenic variables can be useful for managers and engineers involved in highway construction projects.

","language":"English","publisher":"Eagle Hill Institute","doi":"10.1656/045.016.n306","issn":"10926194","usgsCitation":"Hedrick, L.B., Welsh, S.A., and Anderson, J.T., 2009, Influences of high-flow events on a stream channel altered by construction of a highway bridge: A case study: Northeastern Naturalist, v. 16, no. 3, p. 375-394, https://doi.org/10.1656/045.016.n306.","productDescription":"20 p.","startPage":"375","endPage":"394","onlineOnly":"N","additionalOnlineFiles":"N","ipdsId":"IP-009705","costCenters":[{"id":199,"text":"Coop Res Unit Leetown","active":true,"usgs":true}],"links":[{"id":243016,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"West Virginia","county":"Hardy County","otherGeospatial":"Sauerkraut 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Lara B.","contributorId":50346,"corporation":false,"usgs":true,"family":"Hedrick","given":"Lara","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":450855,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Welsh, Stuart A. 0000-0003-0362-054X swelsh@usgs.gov","orcid":"https://orcid.org/0000-0003-0362-054X","contributorId":1483,"corporation":false,"usgs":true,"family":"Welsh","given":"Stuart","email":"swelsh@usgs.gov","middleInitial":"A.","affiliations":[{"id":205,"text":"Cooperative Research Units","active":false,"usgs":true}],"preferred":false,"id":450853,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Anderson, James T.","contributorId":28071,"corporation":false,"usgs":false,"family":"Anderson","given":"James","email":"","middleInitial":"T.","affiliations":[{"id":12432,"text":"West Virginia University","active":true,"usgs":false}],"preferred":false,"id":450854,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70035966,"text":"70035966 - 2009 - Assessing the impact of land use change on hydrology by ensemble modeling (LUCHEM). I: Model intercomparison with current land use","interactions":[],"lastModifiedDate":"2012-03-12T17:21:51","indexId":"70035966","displayToPublicDate":"2009-01-01T00:00:00","publicationYear":"2009","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":664,"text":"Advances in Water Resources","active":true,"publicationSubtype":{"id":10}},"title":"Assessing the impact of land use change on hydrology by ensemble modeling (LUCHEM). I: Model intercomparison with current land use","docAbstract":"This paper introduces the project on 'Assessing the impact of land use change on hydrology by ensemble modeling (LUCHEM)' that aims at investigating the envelope of predictions on changes in hydrological fluxes due to land use change. As part of a series of four papers, this paper outlines the motivation and setup of LUCHEM, and presents a model intercomparison for the present-day simulation results. Such an intercomparison provides a valuable basis to investigate the effects of different model structures on model predictions and paves the ground for the analysis of the performance of multi-model ensembles and the reliability of the scenario predictions in companion papers. In this study, we applied a set of 10 lumped, semi-lumped and fully distributed hydrological models that have been previously used in land use change studies to the low mountainous Dill catchment, Germany. Substantial differences in model performance were observed with Nash-Sutcliffe efficiencies ranging from 0.53 to 0.92. Differences in model performance were attributed to (1) model input data, (2) model calibration and (3) the physical basis of the models. The models were applied with two sets of input data: an original and a homogenized data set. This homogenization of precipitation, temperature and leaf area index was performed to reduce the variation between the models. Homogenization improved the comparability of model simulations and resulted in a reduced average bias, although some variation in model data input remained. The effect of the physical differences between models on the long-term water balance was mainly attributed to differences in how models represent evapotranspiration. Semi-lumped and lumped conceptual models slightly outperformed the fully distributed and physically based models. This was attributed to the automatic model calibration typically used for this type of models. Overall, however, we conclude that there was no superior model if several measures of model performance are considered and that all models are suitable to participate in further multi-model ensemble set-ups and land use change scenario investigations. ?? 2008 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Advances in Water Resources","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.advwatres.2008.10.003","issn":"03091708","usgsCitation":"Breuer, L., Huisman, J.A., Willems, P., Bormann, H., Bronstert, A., Croke, B., Frede, H., Graff, T., Hubrechts, L., Jakeman, A., Kite, G., Lanini, J., Leavesley, G., Lettenmaier, D., Lindstrom, G., Seibert, J., Sivapalan, M., and Viney, N., 2009, Assessing the impact of land use change on hydrology by ensemble modeling (LUCHEM). I: Model intercomparison with current land use: Advances in Water Resources, v. 32, no. 2, p. 129-146, https://doi.org/10.1016/j.advwatres.2008.10.003.","startPage":"129","endPage":"146","numberOfPages":"18","costCenters":[],"links":[{"id":216062,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.advwatres.2008.10.003"},{"id":243903,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"32","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059edebe4b0c8380cd49adb","contributors":{"authors":[{"text":"Breuer, L.","contributorId":54814,"corporation":false,"usgs":true,"family":"Breuer","given":"L.","email":"","affiliations":[],"preferred":false,"id":453367,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Huisman, J. 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Various investigators have proposed hydraulic tomography, the simultaneous analysis of responses to multiple well tests, as a means to obtain a high‐resolution characterization of aquifer flow properties. This study assesses the information content of drawdown records from a set of tomographic pumping tests in an alluvial aquifer, comparing the parameter sensitivity and resolution associated with transient and steady‐shape formulations of the objective function for the parameter estimation problem. The steady‐shape approach takes advantage of the rapid establishment of constant gradients within the region surrounding a pumping well, comparing observed drawdown differences within this region with drawdown differences predicted by a steady state model. Both the transient and steady‐shape approaches resolve K variations only within a limited distance of the pumping intervals and observation points. Relative to the transient approach, the steady‐shape approach reduces the influence of poorly resolved property variations, including K variations outside the region of investigation and storage coefficient variations throughout the model domain.

","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2008WR007249","usgsCitation":"Bohling, G.C., 2009, Sensitivity and resolution of tomographic pumping tests in an alluvial aquifer: Water Resources Research, v. 45, no. 2, Article W02420; 21 p., https://doi.org/10.1029/2008WR007249.","productDescription":"Article W02420; 21 p.","costCenters":[],"links":[{"id":476152,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2008wr007249","text":"Publisher Index Page"},{"id":246235,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"2","noUsgsAuthors":false,"publicationDate":"2009-02-14","publicationStatus":"PW","scienceBaseUri":"505b8d25e4b08c986b318298","contributors":{"authors":[{"text":"Bohling, Geoffrey C.","contributorId":43109,"corporation":false,"usgs":false,"family":"Bohling","given":"Geoffrey","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":454177,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ]}