{"pageNumber":"931","pageRowStart":"23250","pageSize":"25","recordCount":46893,"records":[{"id":70028523,"text":"70028523 - 2006 - Cosmogenic 3He production rates revisited from evidences of grain size dependent release of matrix-sited helium","interactions":[],"lastModifiedDate":"2019-03-26T10:15:38","indexId":"70028523","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1427,"text":"Earth and Planetary Science Letters","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Cosmogenic <sup>3</sup>He production rates revisited from evidences of grain size dependent release of matrix-sited helium","title":"Cosmogenic 3He production rates revisited from evidences of grain size dependent release of matrix-sited helium","docAbstract":"<div class=\"abstract svAbstract \" data-etype=\"ab\"><p id=\"\">Measurements of the cosmogenic <sup>3</sup>He (<sup>3</sup>He<sub>c</sub>) content of various size aliquots of exposed olivines show that the fine fraction (&lt;140&nbsp;μm) has <sup>3</sup>He<sub>c</sub> concentrations between 14 and 100% lower than that of the coarse fractions (0.14–1&nbsp;mm). Such differences attest to a grain size dependent partial release of <sup>3</sup>He<sub>c</sub> from the phenocrysts matrix during the preliminary in vacuo crushing. This result might have important implications since most&nbsp;<sup>3</sup>He<sub>c</sub> measurements have used for ∼20&nbsp;yr a standard routine based on the fusion of bulk&nbsp;<i>powdered</i> phenocrysts, whatever their grain size. A suite of new data obtained from coarse olivine grains yielded a mean Sea Level High Latitude <sup>3</sup>He<sub>c</sub> production rate (SLHL P<sub>3</sub>) of 128±5 and 136±6&nbsp;at. g<sup>−1</sup> yr<sup>−1</sup>, depending on the scaling factors used. This new value, which is ∼15% higher than previously published rates, is obtained from 5 ropy flow surfaces of Mt Etna (38°N) and Hawaiian (19°N) volcanoes, at elevations between sea level and 870&nbsp;m and ranging in age from 1.47±0.05 to 149±23&nbsp;ka according to independent <sup>14</sup>C or K/Ar dating. <sup>3</sup>He loss during the crushing step might account for the discrepancy between the standard reference value of 110–115&nbsp;at. g<sup>−1</sup> y<sup>−1</sup> and the higher SLHL P<sub>3</sub> proposed here. More generally, removal of the powdered fraction before fusion is an important point to consider in further studies in order to avoid any <sup>3</sup>He<sub>c&nbsp;</sub>systematic underestimates.</p><p id=\"\">An altitudinal section has also been sampled on the ropy surface of a ∼1500&nbsp;yr single flow of Mauna Loa (19°N) which allowed a new empirical atmospheric attenuation length of 149±22&nbsp;g cm<sup>−2</sup> to be documented for <sup>3</sup>He<sub>c</sub> in olivines between 2400 and 4000&nbsp;m elevations.</p></div>","language":"English","publisher":"Elsevier","doi":"10.1016/j.epsl.2006.05.012","issn":"0012821X","usgsCitation":"Blard, P., Pik, R., Lave, J., Bourles, D., Burnard, P., Yokochi, R., Marty, B., and Trusdell, F., 2006, Cosmogenic 3He production rates revisited from evidences of grain size dependent release of matrix-sited helium: Earth and Planetary Science Letters, v. 247, no. 3-4, p. 222-234, https://doi.org/10.1016/j.epsl.2006.05.012.","productDescription":"13 p.","startPage":"222","endPage":"234","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":236323,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"247","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fc5fe4b0c8380cd4e262","contributors":{"authors":[{"text":"Blard, P.-H.","contributorId":54475,"corporation":false,"usgs":true,"family":"Blard","given":"P.-H.","email":"","affiliations":[],"preferred":false,"id":418456,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pik, R.","contributorId":74646,"corporation":false,"usgs":true,"family":"Pik","given":"R.","email":"","affiliations":[],"preferred":false,"id":418460,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lave, J.","contributorId":11894,"corporation":false,"usgs":true,"family":"Lave","given":"J.","email":"","affiliations":[],"preferred":false,"id":418454,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bourles, D.","contributorId":66036,"corporation":false,"usgs":true,"family":"Bourles","given":"D.","email":"","affiliations":[],"preferred":false,"id":418459,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Burnard, P.G.","contributorId":22212,"corporation":false,"usgs":true,"family":"Burnard","given":"P.G.","email":"","affiliations":[],"preferred":false,"id":418455,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Yokochi, R.","contributorId":100701,"corporation":false,"usgs":true,"family":"Yokochi","given":"R.","email":"","affiliations":[],"preferred":false,"id":418461,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Marty, B.","contributorId":61231,"corporation":false,"usgs":true,"family":"Marty","given":"B.","email":"","affiliations":[],"preferred":false,"id":418457,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Trusdell, F.","contributorId":61233,"corporation":false,"usgs":true,"family":"Trusdell","given":"F.","affiliations":[],"preferred":false,"id":418458,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70030853,"text":"70030853 - 2006 - Murre eggs (<i>Uria aalge</i> and <i>Uria lomvia</i>) as indicators of mercury contamination in the Alaskan marine environment","interactions":[],"lastModifiedDate":"2018-08-19T21:54:01","indexId":"70030853","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Murre eggs (<i>Uria aalge</i> and <i>Uria lomvia</i>) as indicators of mercury contamination in the Alaskan marine environment","docAbstract":"<p><span>Sixty common murre (</span><i>Uria aalge</i><span>) and 27 thick-billed murre (</span><i>Uria lomvia</i><span>) eggs collected by the Seabird Tissue Archival and Monitoring Project (STAMP) in 1999−2001 from two Gulf of Alaska and three Bering Sea nesting colonies were analyzed for total mercury (Hg) using isotope dilution cold vapor inductively coupled mass spectrometry. Hg concentrations (wet mass) ranged from 0.011 μg/g to 0.357 μg/g (relative standard deviation = 76%), while conspecifics from the same colonies and years had an average relative standard deviation of 33%. Hg levels in eggs from the Gulf of Alaska (0.166 μg/g ± 0.011 μg/g) were significantly higher (</span><i>p</i><span> &lt; 0.0001) than in the Bering Sea (0.047 μg/g ± 0.004 μg/g). Within the Bering Sea, Hg was significantly higher (</span><i>p</i><span> = 0.0007) in eggs from Little Diomede Island near the arctic than at the two more southern colonies. Although thick-billed and common murres are ecologically similar, there were significant species differences in egg Hg concentrations within each region (</span><i>p</i><span> &lt; 0.0001). In the Bering Sea, eggs from thick-billed murres had higher Hg concentrations than eggs from common murres, while in the Gulf of Alaska, common murre eggs had higher concentrations than those of thick-billed murres. A separate one-way analysis of variance on the only time−trend data currently available for a colony (St. Lazaria Island in the Gulf of Alaska) found significantly lower Hg concentrations in common murre eggs collected in 2001 compared to 1999 (</span><i>p</i><span> = 0.017). Results from this study indicate that murre eggs may be effective monitoring units for detecting geographic, species, and temporal patterns of Hg contamination in marine food webs. The relatively small intracolony variation in egg Hg levels and the ability to consistently obtain adequate sample sizes both within and among colonies over a large geographic range means that monitoring efforts using murre eggs will have suitable statistical power for detecting environmental patterns of Hg contamination. The potential influences of trophic effects, physical transport patterns, and biogeochemical processes on these monitoring efforts are discussed, and future plans to investigate the sources of the observed variability are presented.</span></p>","language":"English","publisher":"ACS Publications","doi":"10.1021/es051064i","issn":"0013936X","usgsCitation":"Day, R.D., Vander Pol, S.S., Christopher, S.J., Davis, W., Pugh, R.S., Simac, K.S., Roseneau, D.G., and Becker, P., 2006, Murre eggs (<i>Uria aalge</i> and <i>Uria lomvia</i>) as indicators of mercury contamination in the Alaskan marine environment: Environmental Science & Technology, v. 40, no. 3, p. 659-665, https://doi.org/10.1021/es051064i.","productDescription":"7 p.","startPage":"659","endPage":"665","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":238527,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"40","issue":"3","noUsgsAuthors":false,"publicationDate":"2005-12-22","publicationStatus":"PW","scienceBaseUri":"505a60d7e4b0c8380cd716e0","contributors":{"authors":[{"text":"Day, Russel D.","contributorId":89418,"corporation":false,"usgs":false,"family":"Day","given":"Russel","email":"","middleInitial":"D.","affiliations":[{"id":25356,"text":"National Institute of Standards and Technology","active":true,"usgs":false}],"preferred":false,"id":428950,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Vander Pol, Stacy S.","contributorId":38776,"corporation":false,"usgs":false,"family":"Vander Pol","given":"Stacy","email":"","middleInitial":"S.","affiliations":[{"id":25356,"text":"National Institute of Standards and Technology","active":true,"usgs":false}],"preferred":false,"id":428947,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Christopher, Steven J.","contributorId":85473,"corporation":false,"usgs":false,"family":"Christopher","given":"Steven","email":"","middleInitial":"J.","affiliations":[{"id":25356,"text":"National Institute of Standards and Technology","active":true,"usgs":false}],"preferred":false,"id":428949,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Davis, W.C.","contributorId":6339,"corporation":false,"usgs":true,"family":"Davis","given":"W.C.","email":"","affiliations":[],"preferred":false,"id":428944,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Pugh, Rebecca S.","contributorId":11826,"corporation":false,"usgs":false,"family":"Pugh","given":"Rebecca","email":"","middleInitial":"S.","affiliations":[{"id":25356,"text":"National Institute of Standards and Technology","active":true,"usgs":false}],"preferred":false,"id":428945,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Simac, Kristin S. 0000-0002-4072-1940 ksimac@usgs.gov","orcid":"https://orcid.org/0000-0002-4072-1940","contributorId":131096,"corporation":false,"usgs":true,"family":"Simac","given":"Kristin","email":"ksimac@usgs.gov","middleInitial":"S.","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true}],"preferred":true,"id":428946,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Roseneau, David G.","contributorId":73394,"corporation":false,"usgs":false,"family":"Roseneau","given":"David","email":"","middleInitial":"G.","affiliations":[{"id":6987,"text":"U.S. Fish and Wildlife Sevice","active":true,"usgs":false}],"preferred":false,"id":428948,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Becker, P.R.","contributorId":101035,"corporation":false,"usgs":true,"family":"Becker","given":"P.R.","email":"","affiliations":[],"preferred":false,"id":428951,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":1008387,"text":"1008387 - 2006 - G-banded karotype and ideogram for the critically endangered North Atlantic right whale (Eubalanea glacialis)","interactions":[],"lastModifiedDate":"2015-12-10T13:35:58","indexId":"1008387","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2333,"text":"Journal of Heredity","active":true,"publicationSubtype":{"id":10}},"title":"G-banded karotype and ideogram for the critically endangered North Atlantic right whale (Eubalanea glacialis)","docAbstract":"<p>Published cytogenetic data for extant cetacean species remain incomplete. In a review of the literature, we found karyotypic information for 6 of the 13 tentatively recognized species of the suborder Mysticeti (baleen whales). Among those yet to be described is the critically endangered North Atlantic right whale (Eubalaena glacialis). Herein, we describe and propose a first-generation G-banded karyotype and ideogram for this species (2n = 42), obtained from peripheral blood chromosome preparations from a stranded male calf. This information may prove useful for future genetic mapping projects and for interspecific and intraspecific genomic comparisons by techniques such as zoo-FISH.</p>","language":"English","publisher":"Oxford Journals","doi":"10.1093/jhered/esj033","usgsCitation":"Pause, K., Bonde, R., McGuire, P., Zori, R.T., and Gray, B., 2006, G-banded karotype and ideogram for the critically endangered North Atlantic right whale (Eubalanea glacialis): Journal of Heredity, v. 97, no. 3, p. 303-306, https://doi.org/10.1093/jhered/esj033.","productDescription":"4 p.","startPage":"303","endPage":"306","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":566,"text":"Southeast Ecological Science Center","active":true,"usgs":true}],"links":[{"id":477570,"rank":1,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.562.3994","text":"External Repository"},{"id":132569,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"97","issue":"3","noUsgsAuthors":false,"publicationDate":"2006-04-05","publicationStatus":"PW","scienceBaseUri":"4f4e4b31e4b07f02db6b41ac","contributors":{"authors":[{"text":"Pause, K.C.","contributorId":77102,"corporation":false,"usgs":true,"family":"Pause","given":"K.C.","email":"","affiliations":[],"preferred":false,"id":317606,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bonde, R. K. 0000-0001-9179-4376","orcid":"https://orcid.org/0000-0001-9179-4376","contributorId":63339,"corporation":false,"usgs":true,"family":"Bonde","given":"R. K.","affiliations":[],"preferred":false,"id":317604,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McGuire, P.M.","contributorId":80624,"corporation":false,"usgs":true,"family":"McGuire","given":"P.M.","email":"","affiliations":[],"preferred":false,"id":317607,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Zori, Roberto T.","contributorId":71515,"corporation":false,"usgs":true,"family":"Zori","given":"Roberto","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":317605,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Gray, B.A.","contributorId":54950,"corporation":false,"usgs":true,"family":"Gray","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":317603,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70030771,"text":"70030771 - 2006 - Combined interpretation of radar, hydraulic, and tracer data from a fractured-rock aquifer near Mirror Lake, New Hampshire, USA","interactions":[],"lastModifiedDate":"2019-10-15T16:15:38","indexId":"70030771","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1923,"text":"Hydrogeology Journal","active":true,"publicationSubtype":{"id":10}},"title":"Combined interpretation of radar, hydraulic, and tracer data from a fractured-rock aquifer near Mirror Lake, New Hampshire, USA","docAbstract":"<p class=\"Para\">An integrated interpretation of field experimental cross-hole radar, tracer, and hydraulic data demonstrates the value of combining time-lapse geophysical monitoring with conventional hydrologic measurements for improved characterization of a fractured-rock aquifer. Time-lapse difference-attenuation radar tomography was conducted during saline tracer experiments at the US Geological Survey Fractured Rock Hydrology Research Site near Mirror Lake, Grafton County, New Hampshire, USA. The presence of electrically conductive saline tracer effectively illuminates permeable fractures or pathways for geophysical imaging. The geophysical results guide the construction of three-dimensional numerical models of ground-water flow and solute transport. In an effort to explore alternative explanations for the tracer and tomographic data, a suite of conceptual models involving heterogeneous hydraulic conductivity fields and rate-limited mass transfer are considered. Calibration data include tracer concentrations, the arrival time of peak concentration at the outlet, and steady-state hydraulic head. Results from the coupled inversion procedure suggest that much of the tracer mass migrated outside the three tomographic image planes, and that solute is likely transported by two pathways through the system. This work provides basic and site-specific insights into the control of permeability heterogeneity on ground-water flow and solute transport in fractured rock.</p>","language":"English","publisher":"Springer","doi":"10.1007/s10040-004-0372-y","issn":"14312174","usgsCitation":"Day-Lewis, F., Lane, J., and Gorelick, S., 2006, Combined interpretation of radar, hydraulic, and tracer data from a fractured-rock aquifer near Mirror Lake, New Hampshire, USA: Hydrogeology Journal, v. 14, no. 1-2, p. 1-14, https://doi.org/10.1007/s10040-004-0372-y.","productDescription":"14 p.","startPage":"1","endPage":"14","costCenters":[{"id":493,"text":"Office of Ground Water","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":238793,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United State","state":"New Hampshire","otherGeospatial":"Mirror Lake","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -71.7403793334961,\n              43.90593203475757\n            ],\n            [\n              -71.6609001159668,\n              43.90593203475757\n            ],\n            [\n              -71.6609001159668,\n              43.97243386280852\n            ],\n            [\n              -71.7403793334961,\n              43.97243386280852\n            ],\n            [\n              -71.7403793334961,\n              43.90593203475757\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"14","issue":"1-2","noUsgsAuthors":false,"publicationDate":"2004-09-17","publicationStatus":"PW","scienceBaseUri":"5059f7d9e4b0c8380cd4cd20","contributors":{"authors":[{"text":"Day-Lewis, F. D. 0000-0003-3526-886X","orcid":"https://orcid.org/0000-0003-3526-886X","contributorId":35773,"corporation":false,"usgs":true,"family":"Day-Lewis","given":"F. D.","affiliations":[],"preferred":false,"id":428598,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lane, J.W. Jr.","contributorId":66723,"corporation":false,"usgs":true,"family":"Lane","given":"J.W.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":428599,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gorelick, S.M.","contributorId":21589,"corporation":false,"usgs":true,"family":"Gorelick","given":"S.M.","email":"","affiliations":[],"preferred":false,"id":428597,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030710,"text":"70030710 - 2006 - High-resolution stratigraphy of a Mississippi subdelta-lobe progradation in the Barataria Bight, north-central Gulf of Mexico","interactions":[],"lastModifiedDate":"2014-10-24T13:46:40","indexId":"70030710","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2451,"text":"Journal of Sedimentary Research","onlineIssn":"1938-3681","printIssn":"1527-1404","active":true,"publicationSubtype":{"id":10}},"title":"High-resolution stratigraphy of a Mississippi subdelta-lobe progradation in the Barataria Bight, north-central Gulf of Mexico","docAbstract":"The coastal zone of southeastern Louisiana is the product of numerous cycles of progradation, abandonment, and marine transgression of the Mississippi River delta. Currently, the shoreline in the Barataria Bight is undergoing significant erosion and retreat, and understanding its evolution is crucial in stabilization efforts. This study uses an extensive collection of geophysical and sediment core data from Barataria Bay and offshore to develop a geologic model of the shallow (< 10 m) subsurface. The purpose of the model is twofold: (1) establish the stratigraphic architecture of a subdelta lobe of the Bayou des Families delta, deposited by the Mississippi River approximately 4000 years before present; and (2) provide a high-resolution description of the geologic framework in a context that can be applied to coastal management issues in similar fluvially dominated coastal environments worldwide. The results of the study demonstrate how high-quality geologic data from the coastal environment can be used not only to further our understanding of shoreline evolution but also to provide pertinent information for coastal management needs.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Sedimentary Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"SEPM Society for Sedimentary Geology","doi":"10.2110/jsr.2006.030","issn":"15271404","usgsCitation":"Flocks, J.G., Ferina, N., Dreher, C., Kindinger, J., FitzGerald, D.M., and Kulp, M., 2006, High-resolution stratigraphy of a Mississippi subdelta-lobe progradation in the Barataria Bight, north-central Gulf of Mexico: Journal of Sedimentary Research, v. 76, no. 3-4, p. 429-443, https://doi.org/10.2110/jsr.2006.030.","productDescription":"15 p.","startPage":"429","endPage":"443","numberOfPages":"15","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":212026,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2110/jsr.2006.030"},{"id":239429,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Louisiana","otherGeospatial":"Gulf of Mexico","volume":"76","issue":"3-4","noUsgsAuthors":false,"publicationDate":"2006-04-12","publicationStatus":"PW","scienceBaseUri":"505a3137e4b0c8380cd5dd28","contributors":{"authors":[{"text":"Flocks, J. G.","contributorId":92309,"corporation":false,"usgs":true,"family":"Flocks","given":"J.","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":428341,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ferina, N.F.","contributorId":63140,"corporation":false,"usgs":true,"family":"Ferina","given":"N.F.","email":"","affiliations":[],"preferred":false,"id":428340,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Dreher, C.","contributorId":36186,"corporation":false,"usgs":true,"family":"Dreher","given":"C.","email":"","affiliations":[],"preferred":false,"id":428336,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kindinger, J. L.","contributorId":38983,"corporation":false,"usgs":true,"family":"Kindinger","given":"J. L.","affiliations":[],"preferred":false,"id":428337,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"FitzGerald, D. M.","contributorId":55038,"corporation":false,"usgs":true,"family":"FitzGerald","given":"D.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":428338,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Kulp, M.A.","contributorId":61138,"corporation":false,"usgs":true,"family":"Kulp","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":428339,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70030694,"text":"70030694 - 2006 - Estimates of in situ gas hydrate concentration from resistivity monitoring of gas hydrate bearing sediments during temperature equilibration","interactions":[],"lastModifiedDate":"2012-03-12T17:21:01","indexId":"70030694","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2667,"text":"Marine Geology","active":true,"publicationSubtype":{"id":10}},"title":"Estimates of in situ gas hydrate concentration from resistivity monitoring of gas hydrate bearing sediments during temperature equilibration","docAbstract":"As part of Ocean Drilling Program Leg 204 at southern Hydrate Ridge off Oregon we have monitored changes in sediment electrical resistivity during controlled gas hydrate dissociation experiments. Two cores were used, each filled with gas hydrate bearing sediments (predominantly mud/silty mud). One core was from Site 1249 (1249F-9H3), 42.1 m below seafloor (mbsf) and the other from Site 1248 (1248C-4X1), 28.8 mbsf. At Site 1247, a third experiment was conducted on a core without gas hydrate (1247B-2H1, 3.6 mbsf). First, the cores were imaged using an infra-red (IR) camera upon recovery to map the gas hydrate occurrence through dissociation cooling. Over a period of several hours, successive runs on the multi-sensor track (includes sensors for P-wave velocity, resistivity, magnetic susceptibility and gamma-ray density) were carried out complemented by X-ray imaging on core 1249F-9H3. After complete equilibration to room temperature (17-18??C) and complete gas hydrate dissociation, the final measurement of electrical resistivity was used to calculate pore-water resistivity and salinities. The calculated pore-water freshening after dissociation is equivalent to a gas hydrate concentration in situ of 35-70% along core 1249F-9H3 and 20-35% for core 1248C-4X1 assuming seawater salinity of in situ pore fluid. Detailed analysis of the IR scan, X-ray images and split-core photographs showed the hydrate mainly occurred disseminated throughout the core. Additionally, in core 1249F-9H3, a single hydrate filled vein, approximately 10 cm long and dipping at about 65??, was identified. Analyses of the logging-while-drilling (LWD) resistivity data revealed a structural dip of 40-80?? in the interval between 40 and 44 mbsf. We further analyzed all resistivity data measured on the recovered core during Leg 204. Generally poor data quality due to gas cracks allowed analyses to be carried out only at selected intervals at Sites 1244, 1245, 1246, 1247, 1248, 1249, and 1252. With a few exceptions, data from these intervals yield low to no gas hydrate concentration, which corresponds to estimates from downhole resistivity logs. However, since the gas cracking may be the result of gas hydrate dissociation, this is a biased sampling. Cores that had contained some gas hydrate may have been excluded. ?? 2005 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Marine Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.margeo.2005.10.007","issn":"00253227","usgsCitation":"Riedel, M., Long, P., and Collett, T.S., 2006, Estimates of in situ gas hydrate concentration from resistivity monitoring of gas hydrate bearing sediments during temperature equilibration: Marine Geology, v. 227, no. 3-4, p. 215-225, https://doi.org/10.1016/j.margeo.2005.10.007.","startPage":"215","endPage":"225","numberOfPages":"11","costCenters":[],"links":[{"id":211763,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.margeo.2005.10.007"},{"id":239115,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"227","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0ae5e4b0c8380cd524a1","contributors":{"authors":[{"text":"Riedel, M.","contributorId":65268,"corporation":false,"usgs":true,"family":"Riedel","given":"M.","email":"","affiliations":[],"preferred":false,"id":428240,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Long, P.E.","contributorId":37514,"corporation":false,"usgs":true,"family":"Long","given":"P.E.","email":"","affiliations":[],"preferred":false,"id":428239,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Collett, T. S. 0000-0002-7598-4708","orcid":"https://orcid.org/0000-0002-7598-4708","contributorId":86342,"corporation":false,"usgs":true,"family":"Collett","given":"T.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":428241,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030674,"text":"70030674 - 2006 - Using a binaural biomimetic array to identify bottom objects ensonified by echolocating dolphins","interactions":[],"lastModifiedDate":"2012-03-12T17:21:00","indexId":"70030674","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1013,"text":"Bioinspiration and Biomimetics","active":true,"publicationSubtype":{"id":10}},"title":"Using a binaural biomimetic array to identify bottom objects ensonified by echolocating dolphins","docAbstract":"The development of a unique dolphin biomimetic sonar produced data that were used to study signal processing methods for object identification. Echoes from four metallic objects proud on the bottom, and a substrate-only condition, were generated by bottlenose dolphins trained to ensonify the targets in very shallow water. Using the two-element ('binaural') receive array, object echo spectra were collected and submitted for identification to four neural network architectures. Identification accuracy was evaluated over two receive array configurations, and five signal processing schemes. The four neural networks included backpropagation, learning vector quantization, genetic learning and probabilistic network architectures. The processing schemes included four methods that capitalized on the binaural data, plus a monaural benchmark process. All the schemes resulted in above-chance identification accuracy when applied to learning vector quantization and backpropagation. Beam-forming or concatenation of spectra from both receive elements outperformed the monaural benchmark, with higher sensitivity and lower bias. Ultimately, best object identification performance was achieved by the learning vector quantization network supplied with beam-formed data. The advantages of multi-element signal processing for object identification are clearly demonstrated in this development of a first-ever dolphin biomimetic sonar. ?? 2006 IOP Publishing Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bioinspiration and Biomimetics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1088/1748-3182/1/2/002","issn":"17483182","usgsCitation":"Heiweg, D., Moore, P., Martin, S., and Dankiewicz, L., 2006, Using a binaural biomimetic array to identify bottom objects ensonified by echolocating dolphins: Bioinspiration and Biomimetics, v. 1, no. 2, p. 41-51, https://doi.org/10.1088/1748-3182/1/2/002.","startPage":"41","endPage":"51","numberOfPages":"11","costCenters":[],"links":[{"id":239389,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211992,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1088/1748-3182/1/2/002"}],"volume":"1","issue":"2","noUsgsAuthors":false,"publicationDate":"2006-08-17","publicationStatus":"PW","scienceBaseUri":"505bc022e4b08c986b329f4e","contributors":{"authors":[{"text":"Heiweg, D.A.","contributorId":73818,"corporation":false,"usgs":true,"family":"Heiweg","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":428159,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Moore, P.W.","contributorId":98111,"corporation":false,"usgs":true,"family":"Moore","given":"P.W.","email":"","affiliations":[],"preferred":false,"id":428160,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Martin, S.W.","contributorId":65283,"corporation":false,"usgs":true,"family":"Martin","given":"S.W.","email":"","affiliations":[],"preferred":false,"id":428158,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dankiewicz, L.A.","contributorId":49599,"corporation":false,"usgs":true,"family":"Dankiewicz","given":"L.A.","email":"","affiliations":[],"preferred":false,"id":428157,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70030668,"text":"70030668 - 2006 - Daily energy expenditure in free-ranging Gopher Tortoises (Gopherus polyphemus)","interactions":[],"lastModifiedDate":"2012-03-12T17:21:00","indexId":"70030668","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1337,"text":"Copeia","active":true,"publicationSubtype":{"id":10}},"title":"Daily energy expenditure in free-ranging Gopher Tortoises (Gopherus polyphemus)","docAbstract":"Studies of ecological energetics in chelonians are rare. Here, we report the first measurements of daily energy expenditure (DEE) and water influx rates (WIRs) in free-ranging adult Gopher Tortoises (Gopherus polyphemus). We used the doubly labeled water (DLW) method to measure DEE in six adult tortoises during the non-breeding season in south-central Mississippi, USA. Tortoise DEE ranged from 76.7-187.5 kj/day and WIR ranged from 30.6-93.1 ml H2O/day. Daily energy expenditure did not differ between the sexes, but DEE was positively related to body mass. Water influx rates varied with the interaction of sex and body mass. We used a log/log regression model to assess the allometric relationship between DEE and body mass for Gopher Tortoises, Desert Tortoises (Gopherus agassizii), and Box Turtles (Terrapene carolina), the only chelonians for which DEE has been measured. The slope of this allometric model (0.626) was less than that previously calculated for herbivorous reptiles (0.813), suggesting that chelonians may expend energy at a slower rate per unit of body mass compared to other herbivorous reptiles. We used retrospective power analyses and data from the DLW isotope analyses to develop guidelines for sample sizes and duration of measurement intervals, respectively, for larger-scale energetic studies in this species. ?? 2006 by the American Society of Ichthyologists and Herpetologists.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Copeia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1643/0045-8511(2006)006[0129:DEEIFG]2.0.CO;2","issn":"00458511","usgsCitation":"Jodice, P., Epperson, D., and Visser, G.H., 2006, Daily energy expenditure in free-ranging Gopher Tortoises (Gopherus polyphemus): Copeia, no. 1, p. 129-136, https://doi.org/10.1643/0045-8511(2006)006[0129:DEEIFG]2.0.CO;2.","startPage":"129","endPage":"136","numberOfPages":"8","costCenters":[],"links":[{"id":211936,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1643/0045-8511(2006)006[0129:DEEIFG]2.0.CO;2"},{"id":239321,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fd59e4b0c8380cd4e7bd","contributors":{"authors":[{"text":"Jodice, P.G.R.","contributorId":79846,"corporation":false,"usgs":true,"family":"Jodice","given":"P.G.R.","email":"","affiliations":[],"preferred":false,"id":428132,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Epperson, D.M. 0000-0002-0567-4915","orcid":"https://orcid.org/0000-0002-0567-4915","contributorId":95246,"corporation":false,"usgs":true,"family":"Epperson","given":"D.M.","affiliations":[],"preferred":false,"id":428133,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Visser, G. Henk","contributorId":105497,"corporation":false,"usgs":false,"family":"Visser","given":"G.","email":"","middleInitial":"Henk","affiliations":[],"preferred":false,"id":428134,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":1001083,"text":"1001083 - 2006 - Extirpation of freshwater mussels (Bivalvia: Unionidae) following the invasion of dreissenid mussels in an interconnecting river of the Laurentian Great Lakes","interactions":[],"lastModifiedDate":"2023-02-09T17:06:38.303293","indexId":"1001083","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":737,"text":"American Midland Naturalist","active":true,"publicationSubtype":{"id":10}},"title":"Extirpation of freshwater mussels (Bivalvia: Unionidae) following the invasion of dreissenid mussels in an interconnecting river of the Laurentian Great Lakes","docAbstract":"<p><span>Previous (1992–1994) surveys for native freshwater mussels (Unionidae) along main channels of the Detroit River showed that unionids had been extirpated from all but four sites in the upper reaches of the river due to impacts of dreissenid mussels (</span><i><span class=\"genus-species\">Dreissena polymorpha</span></i><span>&nbsp;and&nbsp;</span><i><span class=\"genus-species\">D. bugensis</span></i><span>). These four sites were surveyed again in 1998 using the same sampling method (timed-random searches) to determine if they may serve as “refugia” where unionids and dreissenids co-exist. Two additional sites were sampled using additional methods (excavated-quadrat and line-transect searches) for comparison with unpublished data collected in 1987 and 1990. A total of four individuals of four species (</span><i><span class=\"genus-species\">Actinonaias ligamentina</span></i><span>,&nbsp;</span><i><span class=\"genus-species\">Cyclonaias tuberculata</span></i><span>,&nbsp;</span><i><span class=\"genus-species\">Lasmigona complanata</span></i><span>&nbsp;and&nbsp;</span><i><span class=\"genus-species\">Pleurobema sintoxia</span></i><span>) were found by timed-random searches at four sites in 1998 compared to 720 individuals of 24 species in 1992 and 39 individuals of 13 species in 1994. Excavated-quadrat and line-transect searches at the two additional sites yielded only one live specimen of&nbsp;</span><i><span class=\"genus-species\">Ptychobranchus fasciolaris</span></i><span>&nbsp;compared to 288 individuals of 18 species in 1987 and 1990. Results of this study suggest that remaining densities of unionids in channels of the Detroit River are too low to support viable reproducing populations of any species. Therefore, we conclude that unionids have been extirpated from main channels of the Detroit River due to dreissenid infestation. As the Detroit River was one of the first water bodies in North America to be invaded by dreissenids, it is likely that unionids will also be extirpated from many other rivers and lakes across eastern North America over the next few decades. Resource agencies should be encouraged to implement active management programs to protect remaining unionid populations from zebra mussels.</span></p>","language":"English","publisher":"University of Notre Dame","doi":"10.1674/0003-0031(2006)155[307:EOFMBU]2.0.CO;2","usgsCitation":"Schloesser, D.W., Metcalfe-Smith, J.L., Kovalak, W.P., Longton, G.D., and Smithee, R.D., 2006, Extirpation of freshwater mussels (Bivalvia: Unionidae) following the invasion of dreissenid mussels in an interconnecting river of the Laurentian Great Lakes: American Midland Naturalist, v. 155, no. 2, p. 307-320, https://doi.org/10.1674/0003-0031(2006)155[307:EOFMBU]2.0.CO;2.","productDescription":"14 p.","startPage":"307","endPage":"320","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":412910,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United  States","state":"Michigan","otherGeospatial":"Detroit River","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -82.93917557144205,\n              42.36486265488605\n            ],\n            [\n              -83.02386372199643,\n              42.36486265488605\n            ],\n            [\n              -83.02386372199643,\n              42.321294249119575\n            ],\n            [\n              -82.93917557144205,\n              42.321294249119575\n            ],\n            [\n              -82.93917557144205,\n              42.36486265488605\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"155","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ae0e4b07f02db688361","contributors":{"authors":[{"text":"Schloesser, Don W.","contributorId":21485,"corporation":false,"usgs":true,"family":"Schloesser","given":"Don","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":310441,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Metcalfe-Smith, Janice L.","contributorId":82267,"corporation":false,"usgs":true,"family":"Metcalfe-Smith","given":"Janice","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":310443,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kovalak, William P.","contributorId":77479,"corporation":false,"usgs":true,"family":"Kovalak","given":"William","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":310442,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Longton, Gary D.","contributorId":17199,"corporation":false,"usgs":true,"family":"Longton","given":"Gary","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":310440,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Smithee, Rick D.","contributorId":100807,"corporation":false,"usgs":true,"family":"Smithee","given":"Rick","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":310444,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":1016477,"text":"1016477 - 2006 - GIS-based niche modeling for mapping species' habitats","interactions":[],"lastModifiedDate":"2012-02-02T00:04:42","indexId":"1016477","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1465,"text":"Ecology","active":true,"publicationSubtype":{"id":10}},"title":"GIS-based niche modeling for mapping species' habitats","docAbstract":"Ecological a??niche modelinga?? using presence-only locality data and large-scale environmental variables provides a powerful tool for identifying and mapping suitable habitat for species over large spatial extents. We describe a niche modeling approach that identifies a minimum (rather than an optimum) set of basic habitat requirements for a species, based on the assumption that constant environmental relationships in a species' distribution (i.e., variables that maintain a consistent value where the species occurs) are most likely to be associated with limiting factors. Environmental variables that take on a wide range of values where a species occurs are less informative because they do not limit a species' distribution, at least over the range of variation sampled. This approach is operationalized by partitioning Mahalanobis D2 (standardized difference between values of a set of environmental variables for any point and mean values for those same variables calculated from all points at which a species was detected) into independent components. The smallest of these components represents the linear combination of variables with minimum variance; increasingly larger components represent larger variances and are increasingly less limiting. We illustrate this approach using the California Gnatcatcher (Polioptila californica Brewster) and provide SAS code to implement it.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Rotenberry, J., Preston, K., and Knick, S., 2006, GIS-based niche modeling for mapping species' habitats: Ecology, v. 87, no. 6, p. 1458-1464.","productDescription":"p. 1458-1464","startPage":"1458","endPage":"1464","numberOfPages":"7","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":133175,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"87","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b30e4b07f02db6b40af","contributors":{"authors":[{"text":"Rotenberry, J.T.","contributorId":57015,"corporation":false,"usgs":true,"family":"Rotenberry","given":"J.T.","affiliations":[],"preferred":false,"id":324284,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Preston, K.L.","contributorId":68689,"corporation":false,"usgs":true,"family":"Preston","given":"K.L.","email":"","affiliations":[],"preferred":false,"id":324285,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Knick, S.","contributorId":33676,"corporation":false,"usgs":true,"family":"Knick","given":"S.","email":"","affiliations":[],"preferred":false,"id":324283,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030602,"text":"70030602 - 2006 - Distribution of foraminifera in Pamlico Sound, North Carolina, over the past century","interactions":[],"lastModifiedDate":"2012-03-12T17:21:05","indexId":"70030602","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2294,"text":"Journal of Foraminiferal Research","active":true,"publicationSubtype":{"id":10}},"title":"Distribution of foraminifera in Pamlico Sound, North Carolina, over the past century","docAbstract":"Foraminiferal and radionuclide data have been used to investigate environmental change that has occurred within Pamlico Sound, North Carolina, over the last century. Environmental conditions were evaluated for three time slices; (1) the modern environment as determined by surficial (0-1 cm) sediments, (2) short-core intervals representing approximately 40 years BP, as determined by 137Cs activity, and (3) short-core intervals representing approximately 120 years BP, as determined by 210Pb activity. Cluster analysis distinguished four foraminiferal assemblages at the surface (0-1 cm): (1) Marsh Biofacies, (2) Estuarine Biofacies A, (3) Estuarine Biofacies B, and (4) Marine Biofacies. The Marsh Biofacies is characterized by typical marsh foraminifera such as Tiphotrocha comprimata, Trochammina inflata, Miliammina fusca and Haplophragmoides wilberti. Estuarine Biofacies A is distinguished from Estuarine Biofacies B by the greater relative abundance of the agglutinated species Ammotium salsum and Ammobaculites crassus in the former and the greater relative abundance of Elphidium excavatum in the latter. The Marine Biofacies is comprised completely of calcareous foraminifera (e.g., Elphidium excavatum, Hanzawaia strattoni, Cibicides lobatulus, Elphidium subarcticum, Quinqueloculina seminula and Elphidium galvestonense) and is restricted to tidal inlets. Down-core foraminiferal data indicate that approximately 120 years BP, Pamlico Sound was dominated by Estuarine Biofacies A, which is indicative of brackish conditions. Upcore in the 40 years BP and modern time slices, Estuarine Biofacies B is the more prominent assemblage within Pamlico Sound; this is indicative of increased salinity over time. Lowered salinity conditions 120 years BP may be the result of high hurricane activity over a several year period.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Foraminiferal Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2113/36.2.135","issn":"00961191","usgsCitation":"Abbene, I., Culver, S., Corbett, D., Buzas, M., and Tully, L., 2006, Distribution of foraminifera in Pamlico Sound, North Carolina, over the past century: Journal of Foraminiferal Research, v. 36, no. 2, p. 135-151, https://doi.org/10.2113/36.2.135.","startPage":"135","endPage":"151","numberOfPages":"17","costCenters":[],"links":[{"id":477645,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.579.1399","text":"External Repository"},{"id":239385,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211988,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/36.2.135"}],"volume":"36","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a02d1e4b0c8380cd501f9","contributors":{"authors":[{"text":"Abbene, I.J.","contributorId":44349,"corporation":false,"usgs":true,"family":"Abbene","given":"I.J.","email":"","affiliations":[],"preferred":false,"id":427808,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Culver, S.J.","contributorId":53970,"corporation":false,"usgs":true,"family":"Culver","given":"S.J.","email":"","affiliations":[],"preferred":false,"id":427809,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Corbett, D.R.","contributorId":73791,"corporation":false,"usgs":true,"family":"Corbett","given":"D.R.","email":"","affiliations":[],"preferred":false,"id":427811,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Buzas, M.A.","contributorId":58018,"corporation":false,"usgs":true,"family":"Buzas","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":427810,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Tully, L.S.","contributorId":107494,"corporation":false,"usgs":true,"family":"Tully","given":"L.S.","email":"","affiliations":[],"preferred":false,"id":427812,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031044,"text":"70031044 - 2006 - The allometric relationship between resting metabolic rate and body mass in wild waterfowl (Anatidae) and an application to estimation of winter habitat requirements","interactions":[],"lastModifiedDate":"2012-03-12T17:21:15","indexId":"70031044","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1318,"text":"Condor","active":true,"publicationSubtype":{"id":10}},"title":"The allometric relationship between resting metabolic rate and body mass in wild waterfowl (Anatidae) and an application to estimation of winter habitat requirements","docAbstract":"We examined the allometric relationship between resting metabolic rate (RMR; kJ day-1) and body mass (kg) in wild waterfowl (Anatidae) by regressing RMR on body mass using species means from data obtained from published literature (18 sources, 54 measurements, 24 species; all data from captive birds). There was no significant difference among measurements from the rest (night; n = 37), active (day; n = 14), and unspecified (n = 3) phases of the daily cycle (P > 0.10), and we pooled these measurements for analysis. The resulting power function (aMassb) for all waterfowl (swans, geese, and ducks) had an exponent (b; slope of the regression) of 0.74, indistinguishable from that determined with commonly used general equations for nonpasserine birds (0.72-0.73). In contrast, the mass proportionality coefficient (b; y-intercept at mass = 1 kg) of 422 exceeded that obtained from the nonpasserine equations by 29%-37%. Analyses using independent contrasts correcting for phylogeny did not substantially alter the equation. Our results suggest the waterfowl equation provides a more appropriate estimate of RMR for bioenergetics analyses of waterfowl than do the general nonpasserine equations. When adjusted with a multiple to account for energy costs of free living, the waterfowl equation better estimates daily energy expenditure. Using this equation, we estimated that the extent of wetland habitat required to support wintering waterfowl populations could be 37%-50% higher than previously predicted using general nonpasserine equations. ?? The Cooper Ornithological Society 2006.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Condor","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1650/0010-5422(2006)108[0166:TARBRM]2.0.CO;2","issn":"00105422","usgsCitation":"Miller, M.R., and Eadie, J.M., 2006, The allometric relationship between resting metabolic rate and body mass in wild waterfowl (Anatidae) and an application to estimation of winter habitat requirements: Condor, v. 108, no. 1, p. 166-177, https://doi.org/10.1650/0010-5422(2006)108[0166:TARBRM]2.0.CO;2.","startPage":"166","endPage":"177","numberOfPages":"12","costCenters":[],"links":[{"id":477419,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1650/0010-5422(2006)108[0166:tarbrm]2.0.co;2","text":"Publisher Index Page"},{"id":238871,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211565,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1650/0010-5422(2006)108[0166:TARBRM]2.0.CO;2"}],"volume":"108","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba9b6e4b08c986b32245b","contributors":{"authors":[{"text":"Miller, M. R.","contributorId":19104,"corporation":false,"usgs":true,"family":"Miller","given":"M.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":429753,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Eadie, J. McA","contributorId":92206,"corporation":false,"usgs":true,"family":"Eadie","given":"J.","email":"","middleInitial":"McA","affiliations":[],"preferred":false,"id":429754,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031030,"text":"70031030 - 2006 - Development of partial rock veneers by root throw in a subalpine setting","interactions":[],"lastModifiedDate":"2012-03-12T17:21:17","indexId":"70031030","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1425,"text":"Earth Surface Processes and Landforms","active":true,"publicationSubtype":{"id":10}},"title":"Development of partial rock veneers by root throw in a subalpine setting","docAbstract":"Rock veneers stabilize hillslope surfaces, occur especially in areas of immature soil, and form through a variety of process sets that includes root throw. Near Westcliffe, Colorado, USA, data were collected from a 20 ?? 500 m transect on the east slope of the Sangre de Cristo Mountains. Ages of pit/mound complexes with rock fragments exposed at the surface by root throw ranged from recent (freshly toppled tree) to unknown (complete tree decay). Calculations based on dimensions of the pit/mound complexes, estimated time of free topppling, sizes of exposed rock fragments, and percentage rock covers at pit/mound complexes, as well as within the transect area, indicate that recent rates of root throw have resulted in only partial rock veneering since late Pleistocene deglaciation. Weathering of rock fragments prevent development of an extensive rock veneer and causes a balance, achieved within an estimated 700 years, between the rates of rock-fragment exposure by root throw and clast disintegration by chemical reduction. The estimated rate of rock-fragment reduction accounts for part of the fluvial sediment yields observed for forested subalpine areas of western North America. Copyright ?? 2005 John Wiley & Sons, Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Earth Surface Processes and Landforms","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/esp.1222","issn":"01979337","usgsCitation":"Osterkamp, W.R., Toy, T., and Lenart, M., 2006, Development of partial rock veneers by root throw in a subalpine setting: Earth Surface Processes and Landforms, v. 31, no. 1, p. 1-14, https://doi.org/10.1002/esp.1222.","startPage":"1","endPage":"14","numberOfPages":"14","costCenters":[],"links":[{"id":477705,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://doi.org/10.1002/esp.1222","text":"External Repository"},{"id":211364,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/esp.1222"},{"id":238643,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"31","issue":"1","noUsgsAuthors":false,"publicationDate":"2005-09-27","publicationStatus":"PW","scienceBaseUri":"505a005ee4b0c8380cd4f716","contributors":{"authors":[{"text":"Osterkamp, W. R.","contributorId":46044,"corporation":false,"usgs":true,"family":"Osterkamp","given":"W.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":429695,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Toy, T.J.","contributorId":36626,"corporation":false,"usgs":true,"family":"Toy","given":"T.J.","email":"","affiliations":[],"preferred":false,"id":429694,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lenart, M.T.","contributorId":22575,"corporation":false,"usgs":true,"family":"Lenart","given":"M.T.","email":"","affiliations":[],"preferred":false,"id":429693,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030999,"text":"70030999 - 2006 - Sulfate deposition in subsurface regolith in Gusev crater, Mars","interactions":[],"lastModifiedDate":"2018-11-28T09:04:37","indexId":"70030999","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2317,"text":"Journal of Geophysical Research E: Planets","active":true,"publicationSubtype":{"id":10}},"title":"Sulfate deposition in subsurface regolith in Gusev crater, Mars","docAbstract":"<p>Excavating into the shallow Martian subsurface has the potential to expose stratigraphic layers and mature regolith, which may hold a record of more ancient aqueous interactions than those expected under current Martian surface conditions. During the Spirit rover's exploration of Gusev crater, rover wheels were used to dig three trenches into the subsurface regolith down to 6-11 cm depth: Road Cut, the Big Hole, and The Boroughs. A high oxidation state of Fe and high concentrations of Mg, S, Cl, and Br were found in the subsurface regolith within the two trenches on the plains, between the Bonneville crater and the foot of Columbia Hills. Data analyses on the basis of geochemistry and mineralogy observations suggest the deposition of sulfate minerals within the subsurface regolith, mainly Mg-sulfates accompanied by minor Ca-sulfates and perhaps Fe-sulfates. An increase of Fe2O3, an excess of SiO2, and a minor decrease in the olivine proportion relative to surface materials are also inferred. Three hypotheses are proposed to explain the geochemical trends observed in trenches: (1) multiple episodes of acidic fluid infiltration, accompanied by in situ interaction with igneous minerals and salt deposition; (2) an open hydrologic system characterized by ion transportation in the fluid, subsequent evaporation of the fluid, and salt deposition; and (3) emplacement and mixing of impact ejecta of variable composition. While all three may have plausibly contributed to the current state of the subsurface regolith, the geochemical data are most consistent with ion transportation by fluids and salt deposition as a result of open-system hydrologic behavior. Although sulfates make up &gt;20 wt.% of the regolith in the wall of The Boroughs trench, a higher hydrated sulfate than kieserite within The Boroughs or a greater abundance of sulfates elsewhere than is seen in The Boroughs wall regolith would be needed to hold the structural water indicated by the water-equivalent hydrogen concentration observed by the Gamma-Ray Spectrometer on Odyssey in the Gusev region.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research E: Planets","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"American Geophysical Union","publisherLocation":"Washington, D.C.","doi":"10.1029/2005JE002513","issn":"01480227","usgsCitation":"Wang, A., Haskin, L., Squyres, S.W., Jolliff, B., Crumpler, L., Gellert, R., Schroder, C., Herkenhoff, K.E., Hurowitz, J., Tosca, N., Farrand, W.H., Anderson, R., and Knudson, A., 2006, Sulfate deposition in subsurface regolith in Gusev crater, Mars: Journal of Geophysical Research E: Planets, v. 111, no. E2, 19 p., https://doi.org/10.1029/2005JE002513.","productDescription":"19 p.","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":477418,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2005je002513","text":"Publisher Index Page"},{"id":238641,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"Gusev crater; Mars","volume":"111","issue":"E2","noUsgsAuthors":false,"publicationDate":"2006-02-21","publicationStatus":"PW","scienceBaseUri":"505b9dc0e4b08c986b31da54","contributors":{"authors":[{"text":"Wang, A.","contributorId":46735,"corporation":false,"usgs":true,"family":"Wang","given":"A.","email":"","affiliations":[],"preferred":false,"id":429578,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Haskin, L.A.","contributorId":74926,"corporation":false,"usgs":true,"family":"Haskin","given":"L.A.","email":"","affiliations":[],"preferred":false,"id":429582,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Squyres, S. W.","contributorId":31836,"corporation":false,"usgs":true,"family":"Squyres","given":"S.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":429576,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jolliff, B.L.","contributorId":21268,"corporation":false,"usgs":true,"family":"Jolliff","given":"B.L.","email":"","affiliations":[],"preferred":false,"id":429575,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Crumpler, L.","contributorId":59545,"corporation":false,"usgs":true,"family":"Crumpler","given":"L.","email":"","affiliations":[],"preferred":false,"id":429579,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Gellert, Ralf","contributorId":35049,"corporation":false,"usgs":false,"family":"Gellert","given":"Ralf","email":"","affiliations":[{"id":12660,"text":"University of Guelph","active":true,"usgs":false}],"preferred":false,"id":429577,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Schroder, C.","contributorId":67201,"corporation":false,"usgs":true,"family":"Schroder","given":"C.","affiliations":[],"preferred":false,"id":429581,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Herkenhoff, Kenneth E. 0000-0002-3153-6663 kherkenhoff@usgs.gov","orcid":"https://orcid.org/0000-0002-3153-6663","contributorId":2275,"corporation":false,"usgs":true,"family":"Herkenhoff","given":"Kenneth","email":"kherkenhoff@usgs.gov","middleInitial":"E.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":429572,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Hurowitz, J.","contributorId":17742,"corporation":false,"usgs":true,"family":"Hurowitz","given":"J.","email":"","affiliations":[],"preferred":false,"id":429574,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Tosca, N.J.","contributorId":17354,"corporation":false,"usgs":true,"family":"Tosca","given":"N.J.","email":"","affiliations":[],"preferred":false,"id":429573,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Farrand, W. H.","contributorId":64372,"corporation":false,"usgs":true,"family":"Farrand","given":"W.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":429580,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Anderson, R.","contributorId":104191,"corporation":false,"usgs":false,"family":"Anderson","given":"R.","affiliations":[],"preferred":false,"id":429583,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Knudson, A.T.","contributorId":15746,"corporation":false,"usgs":true,"family":"Knudson","given":"A.T.","email":"","affiliations":[],"preferred":false,"id":429571,"contributorType":{"id":1,"text":"Authors"},"rank":13}]}}
,{"id":70030941,"text":"70030941 - 2006 - The quest for the perfect gravity anomaly: Part 2 - Mass effects and anomaly inversion","interactions":[],"lastModifiedDate":"2012-03-12T17:21:19","indexId":"70030941","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3317,"text":"SEG Technical Program Expanded Abstracts","active":true,"publicationSubtype":{"id":10}},"title":"The quest for the perfect gravity anomaly: Part 2 - Mass effects and anomaly inversion","docAbstract":"Gravity anomalies have become an important tool for geologic studies since the widespread use of high-precision gravimeters after the Second World War. More recently the development of instrumentation for airborne gravity observations, procedures for acquiring data from satellite platforms, the readily available Global Positioning System for precise vertical and horizontal control, improved global data bases, and enhancement of computational hardware and software have accelerated the use of the gravity method. As a result, efforts are being made to improve the gravity databases that are made available to the geoscience community by broadening their observational holdings and increasing the accuracy and precision of the included data. Currently the North American Gravity Database as well as the individual databases of Canada, Mexico, and the United States of America are being revised using new formats and standards. The objective of this paper is to describe the use of the revised standards for gravity data processing and modeling and there impact on geological interpretations. ?? 2005 Society of Exploration Geophysicists.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"SEG Technical Program Expanded Abstracts","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1190/1.2370393","issn":"10523812","usgsCitation":"Keller, G.R., Hildenbrand, T., Hinze, W.J., Li, X., Ravat, D., and Webring, M., 2006, The quest for the perfect gravity anomaly: Part 2 - Mass effects and anomaly inversion: SEG Technical Program Expanded Abstracts, v. 25, no. 1, p. 864-868, https://doi.org/10.1190/1.2370393.","startPage":"864","endPage":"868","numberOfPages":"5","costCenters":[],"links":[{"id":211533,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1190/1.2370393"},{"id":238835,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"25","issue":"1","noUsgsAuthors":false,"publicationDate":"2006-10-06","publicationStatus":"PW","scienceBaseUri":"505baeebe4b08c986b32441a","contributors":{"authors":[{"text":"Keller, Gordon R.","contributorId":90280,"corporation":false,"usgs":true,"family":"Keller","given":"Gordon","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":429320,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hildenbrand, T.G.","contributorId":83892,"corporation":false,"usgs":true,"family":"Hildenbrand","given":"T.G.","email":"","affiliations":[],"preferred":false,"id":429319,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hinze, W. J.","contributorId":52607,"corporation":false,"usgs":false,"family":"Hinze","given":"W.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":429316,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Li, X.","contributorId":67635,"corporation":false,"usgs":true,"family":"Li","given":"X.","email":"","affiliations":[],"preferred":false,"id":429317,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ravat, D.","contributorId":102971,"corporation":false,"usgs":true,"family":"Ravat","given":"D.","email":"","affiliations":[],"preferred":false,"id":429321,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Webring, M.","contributorId":67662,"corporation":false,"usgs":true,"family":"Webring","given":"M.","affiliations":[],"preferred":false,"id":429318,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70028993,"text":"70028993 - 2006 - Mourning dove hunting regulation strategy based on annual harvest statistics and banding data","interactions":[],"lastModifiedDate":"2012-03-12T17:20:42","indexId":"70028993","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Mourning dove hunting regulation strategy based on annual harvest statistics and banding data","docAbstract":"Although managers should strive to base game bird harvest management strategies on mechanistic population models, monitoring programs required to build and continuously update these models may not be in place. Alternatively, If estimates of total harvest and harvest rates are available, then population estimates derived from these harvest data can serve as the basis for making hunting regulation decisions based on population growth rates derived from these estimates. I present a statistically rigorous approach for regulation decision-making using a hypothesis-testing framework and an assumed framework of 3 hunting regulation alternatives. I illustrate and evaluate the technique with historical data on the mid-continent mallard (Anas platyrhynchos) population. I evaluate the statistical properties of the hypothesis-testing framework using the best available data on mourning doves (Zenaida macroura). I use these results to discuss practical implementation of the technique as an interim harvest strategy for mourning doves until reliable mechanistic population models and associated monitoring programs are developed.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Wildlife Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2193/0022-541X(2006)70[1302:MDHRSB]2.0.CO;2","issn":"0022541X","usgsCitation":"Otis, D.L., 2006, Mourning dove hunting regulation strategy based on annual harvest statistics and banding data: Journal of Wildlife Management, v. 70, no. 5, p. 1302-1307, https://doi.org/10.2193/0022-541X(2006)70[1302:MDHRSB]2.0.CO;2.","startPage":"1302","endPage":"1307","numberOfPages":"6","costCenters":[],"links":[{"id":209912,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2193/0022-541X(2006)70[1302:MDHRSB]2.0.CO;2"},{"id":236664,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"70","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5ec2e4b0c8380cd70c61","contributors":{"authors":[{"text":"Otis, David L.","contributorId":64396,"corporation":false,"usgs":true,"family":"Otis","given":"David","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":420865,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70030432,"text":"70030432 - 2006 - Sensitivity of Last Glacial Maximum climate to uncertainties in tropical and subtropical ocean temperatures","interactions":[],"lastModifiedDate":"2012-03-12T17:21:12","indexId":"70030432","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3219,"text":"Quaternary Science Reviews","active":true,"publicationSubtype":{"id":10}},"title":"Sensitivity of Last Glacial Maximum climate to uncertainties in tropical and subtropical ocean temperatures","docAbstract":"The faunal and floral gradients that underlie the CLIMAP (1981) sea-surface temperature (SST) reconstructions for the Last Glacial Maximum (LGM) reflect ocean temperature gradients and frontal positions. The transfer functions used to reconstruct SSTs from biologic gradients are biased, however, because at the warmest sites they display inherently low sensitivity in translating fauna to SST and they underestimate SST within the euphotic zones where the pycnocline is strong. Here we assemble available data and apply a statistical approach to adjust for hypothetical biases in the faunal-based SST estimates of LGM temperature. The largest bias adjustments are distributed in the tropics (to address low sensitivity) and subtropics (to address underestimation in the euphotic zones). The resulting SSTs are generally in better agreement than CLIMAP with recent geochemical estimates of glacial-interglacial temperature changes. We conducted a series of model experiments using the GENESIS general atmospheric circulation model to assess the sensitivity of the climate system to our bias-adjusted SSTs. Globally, the new SST field results in a modeled LGM surface-air cooling relative to present of 6.4 ??C (1.9 ??C cooler than that of CLIMAP). Relative to the simulation with CLIMAP SSTs, modeled precipitation over the oceans is reduced by 0.4 mm d-1 (an anomaly -0.4 versus 0.0 mm d-1 for CLIMAP) and increased over land (an anomaly -0.2 versus -0.5 mm d-1 for CLIMAP). Regionally strong responses are induced by changes in SST gradients. Data-model comparisons indicate improvement in agreement relative to CLIMAP, but differences among terrestrial data inferences and simulated moisture and temperature remain. Our SSTs result in positive mass balance over the northern hemisphere ice sheets (primarily through reduced summer ablation), supporting the hypothesis that tropical and subtropical ocean temperatures may have played a role in triggering glacial changes at higher latitudes.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Quaternary Science Reviews","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.quascirev.2005.12.010","issn":"02773791","usgsCitation":"Hostetler, S., Pisias, N., and Mix, A., 2006, Sensitivity of Last Glacial Maximum climate to uncertainties in tropical and subtropical ocean temperatures: Quaternary Science Reviews, v. 25, no. 11-12, p. 1168-1185, https://doi.org/10.1016/j.quascirev.2005.12.010.","startPage":"1168","endPage":"1185","numberOfPages":"18","costCenters":[],"links":[{"id":212096,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.quascirev.2005.12.010"},{"id":239517,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"25","issue":"11-12","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8d27e4b08c986b3182a0","contributors":{"authors":[{"text":"Hostetler, S. 0000-0003-2272-8302","orcid":"https://orcid.org/0000-0003-2272-8302","contributorId":30336,"corporation":false,"usgs":true,"family":"Hostetler","given":"S.","affiliations":[],"preferred":false,"id":427134,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pisias, N.","contributorId":25290,"corporation":false,"usgs":true,"family":"Pisias","given":"N.","affiliations":[],"preferred":false,"id":427133,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mix, A.","contributorId":39363,"corporation":false,"usgs":true,"family":"Mix","given":"A.","email":"","affiliations":[],"preferred":false,"id":427135,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030738,"text":"70030738 - 2006 - Characterization of unsaturated zone hydrogeologic units using matrix properties and depositional history in a complex volcanic environment","interactions":[],"lastModifiedDate":"2018-03-30T12:23:18","indexId":"70030738","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","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":"Characterization of unsaturated zone hydrogeologic units using matrix properties and depositional history in a complex volcanic environment","docAbstract":"<p><span>Characterization of the physical and unsaturated hydrologic properties of subsurface materials is necessary to calculate flow and transport for land use practices and to evaluate subsurface processes such as perched water or lateral diversion of water, which are influenced by features such as faults, fractures, and abrupt changes in lithology. Input for numerical flow models typically includes parameters that describe hydrologic properties and the initial and boundary conditions for all materials in the unsaturated zone, such as bulk density, porosity, and particle density, saturated hydraulic conductivity, moisture-retention characteristics, and field water content. We describe an approach for systematically evaluating the site features that contribute to water flow, using physical and hydraulic data collected at the laboratory scale, to provide a representative set of physical and hydraulic parameters for numerically calculating flow of water through the materials at a site. An example case study from analyses done for the heterogeneous, layered, volcanic rocks at Yucca Mountain is presented, but the general approach for parameterization could be applied at any site where depositional processes follow deterministic patterns. Hydrogeologic units at this site were defined using (i) a database developed from 5320 rock samples collected from the coring of 23 shallow (&lt;100 m) and 10 deep (500–1000 m) boreholes, (ii) lithostratigraphic boundaries and corresponding relations to porosity, (iii) transition zones with pronounced changes in properties over short vertical distances, (iv) characterization of the influence of mineral alteration on hydrologic properties such as permeability and moisture-retention characteristics, and (v) a statistical analysis to evaluate where boundaries should be adjusted to minimize the variance within layers. Model parameters developed in this study, and the relation of flow properties to porosity, can be used to produce detailed and accurate representations of the core-scale hydrologic processes ongoing at Yucca Mountain.</span></p>","language":"English","publisher":"ACSESS","doi":"10.2136/vzj2004.0180","usgsCitation":"Flint, L.E., Buesch, D.C., and Flint, A.L., 2006, Characterization of unsaturated zone hydrogeologic units using matrix properties and depositional history in a complex volcanic environment: Vadose Zone Journal, v. 5, no. 1, p. 480-492, https://doi.org/10.2136/vzj2004.0180.","productDescription":"13 p.","startPage":"480","endPage":"492","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":238758,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"5","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f4e8e4b0c8380cd4bfce","contributors":{"authors":[{"text":"Flint, Lorraine E. 0000-0002-7868-441X lflint@usgs.gov","orcid":"https://orcid.org/0000-0002-7868-441X","contributorId":1184,"corporation":false,"usgs":true,"family":"Flint","given":"Lorraine","email":"lflint@usgs.gov","middleInitial":"E.","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":true,"id":428461,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Buesch, David C. 0000-0002-4978-5027 dbuesch@usgs.gov","orcid":"https://orcid.org/0000-0002-4978-5027","contributorId":1154,"corporation":false,"usgs":true,"family":"Buesch","given":"David","email":"dbuesch@usgs.gov","middleInitial":"C.","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true},{"id":309,"text":"Geology and Geophysics Science Center","active":true,"usgs":true},{"id":234,"text":"Earthquake Hazards Program","active":true,"usgs":true}],"preferred":true,"id":428462,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Flint, Alan L. 0000-0002-5118-751X aflint@usgs.gov","orcid":"https://orcid.org/0000-0002-5118-751X","contributorId":1492,"corporation":false,"usgs":true,"family":"Flint","given":"Alan","email":"aflint@usgs.gov","middleInitial":"L.","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":657,"text":"Western Geographic Science Center","active":true,"usgs":true}],"preferred":true,"id":428463,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030435,"text":"70030435 - 2006 - Change in atmospheric mineral aerosols in response to climate: Last glacial period, preindustrial, modern, and doubled carbon dioxide climates","interactions":[],"lastModifiedDate":"2012-03-12T17:21:12","indexId":"70030435","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2316,"text":"Journal of Geophysical Research D: Atmospheres","active":true,"publicationSubtype":{"id":10}},"title":"Change in atmospheric mineral aerosols in response to climate: Last glacial period, preindustrial, modern, and doubled carbon dioxide climates","docAbstract":"Desert dust simulations generated by the National Center for Atmospheric Research's Community Climate System Model for the current climate are shown to be consistent with present day satellite and deposition data. The response of the dust cycle to last glacial maximum, preindustrial, modern, and doubled-carbon dioxide climates is analyzed. Only natural (non-land use related) dust sources are included in this simulation. Similar to some previous studies, dust production mainly responds to changes in the source areas from vegetation changes, not from winds or soil moisture changes alone. This model simulates a +92%, +33%, and -60% change in dust loading for the last glacial maximum, preindustrial, and doubled-carbon dioxide climate, respectively, when impacts of carbon dioxide fertilization on vegetation are included in the model. Terrestrial sediment records from the last glacial maximum compiled here indicate a large underestimate of deposition in continental regions, probably due to the lack of simulation of glaciogenic dust sources. In order to include the glaciogenic dust sources as a first approximation, we designate the location of these sources, and infer the size of the sources using an inversion method that best matches the available data. The inclusion of these inferred glaciogenic dust sources increases our dust flux in the last glacial maximum from 2.1 to 3.3 times current deposition. Copyright 2006 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research D: Atmospheres","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2005JD006653","issn":"01480227","usgsCitation":"Mahowald, N., Muhs, D., Levis, S., Rasch, P., Yoshioka, M., Zender, C., and Luo, C., 2006, Change in atmospheric mineral aerosols in response to climate: Last glacial period, preindustrial, modern, and doubled carbon dioxide climates: Journal of Geophysical Research D: Atmospheres, v. 111, no. 10, https://doi.org/10.1029/2005JD006653.","costCenters":[],"links":[{"id":477488,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://escholarship.org/uc/item/8q3815jn","text":"Publisher Index Page"},{"id":212126,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2005JD006653"},{"id":239552,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"111","issue":"10","noUsgsAuthors":false,"publicationDate":"2006-05-31","publicationStatus":"PW","scienceBaseUri":"5059f400e4b0c8380cd4ba9a","contributors":{"authors":[{"text":"Mahowald, N. M.","contributorId":22964,"corporation":false,"usgs":false,"family":"Mahowald","given":"N. M.","affiliations":[],"preferred":false,"id":427142,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Muhs, D.R. 0000-0001-7449-251X","orcid":"https://orcid.org/0000-0001-7449-251X","contributorId":61460,"corporation":false,"usgs":true,"family":"Muhs","given":"D.R.","affiliations":[],"preferred":false,"id":427147,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Levis, S.","contributorId":24172,"corporation":false,"usgs":true,"family":"Levis","given":"S.","email":"","affiliations":[],"preferred":false,"id":427143,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rasch, P.J.","contributorId":33919,"corporation":false,"usgs":true,"family":"Rasch","given":"P.J.","email":"","affiliations":[],"preferred":false,"id":427145,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Yoshioka, M.","contributorId":22579,"corporation":false,"usgs":true,"family":"Yoshioka","given":"M.","email":"","affiliations":[],"preferred":false,"id":427141,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Zender, C.S.","contributorId":30443,"corporation":false,"usgs":true,"family":"Zender","given":"C.S.","email":"","affiliations":[],"preferred":false,"id":427144,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Luo, C.","contributorId":52697,"corporation":false,"usgs":true,"family":"Luo","given":"C.","email":"","affiliations":[],"preferred":false,"id":427146,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70028975,"text":"70028975 - 2006 - Long-term dynamics of production, respiration, and net CO<sub>2</sub> exchange in two sagebrush-steppe ecosystems","interactions":[],"lastModifiedDate":"2017-04-11T15:53:45","indexId":"70028975","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3228,"text":"Rangeland Ecology and Management","onlineIssn":"1551-5028","printIssn":"1550-7424","active":true,"publicationSubtype":{"id":10}},"title":"Long-term dynamics of production, respiration, and net CO<sub>2</sub> exchange in two sagebrush-steppe ecosystems","docAbstract":"<p><span>We present a synthesis of long-term measurements of CO</span><sub>2</sub><span> exchange in 2 US Intermountain West sagebrush-steppe ecosystems. The locations near Burns, Oregon (1995–2001), and Dubois, Idaho (1996–2001), are part of the AgriFlux Network of the Agricultural Research Service, United States Department of Agriculture. Measurements of net ecosystem CO</span><sub>2</sub><span> exchange (</span><i>F</i><sub><i>c</i></sub><span>) during the growing season were continuously recorded at flux towers using the Bowen ratio-energy balance technique. Data were partitioned into gross primary productivity (</span><i>P</i><sub><i>g</i></sub><span>) and ecosystem respiration (</span><i>R</i><sub><i>e</i></sub><span>) using the light-response function method. Wintertime fluxes were measured during 1999/2000 and 2000/2001 and used to model fluxes in other winters. Comparison of daytime respiration derived from light-response analysis with nighttime tower measurements showed close correlation, with daytime respiration being on the average higher than nighttime respiration. Maxima of </span><i>P</i><sub><i>g</i></sub><span> and </span><i>R</i><sub><i>e</i></sub><span> at Burns were both 20&nbsp;g CO</span><sub>2</sub><span>·m</span><sup>−2</sup><span>·d</span><sup>−1</sup><span> in 1998. Maxima of </span><i>P</i><sub><i>g</i></sub><span> and </span><i>R</i><sub><i>e</i></sub><span> at Dubois were 37 and 35&nbsp;g CO</span><sub>2</sub><span>·m</span><sup>−2</sup><span>·d</span><sup>−1</sup><span>, respectively, in 1997. Mean annual gross primary production at Burns was 1 111 (range 475–1 715)&nbsp;g CO</span><sub>2</sub><span>·m</span><sup>−2</sup><span>·y</span><sup>−1</sup><span> or about 30% lower than that at Dubois (1 602, range 963–2 162&nbsp;g CO</span><sub>2</sub><span>·m</span><sup>−2</sup><span>·y</span><sup>−1</sup><span>). Across the years, both ecosystems were net sinks for atmospheric CO</span><sub>2</sub><span> with a mean net ecosystem CO</span><sub>2</sub><span> exchange of 82&nbsp;g CO</span><sub>2</sub><span>·m</span><sup>−2</sup><span>·y</span><sup>−1</sup><span> at Burns and 253&nbsp;g CO</span><sub>2</sub><span>·m</span><sup>−2</sup><span>·y</span><sup>−1</sup><span> at Dubois, but on a yearly basis either site could be a C sink or source, mostly depending on precipitation timing and amount. Total annual precipitation is not a good predictor of carbon sequestration across sites. Our results suggest that </span><i>F</i><sub><i>c</i></sub><span> should be partitioned into </span><i>P</i><sub><i>g</i></sub><span> and </span><i>R</i><sub><i>e</i></sub><span> components to allow prediction of seasonal and yearly dynamics of CO</span><sub>2</sub><span>fluxes.</span></p>","language":"English","publisher":"Elsevier","doi":"10.2111/05-198R1.1","issn":"15507424","usgsCitation":"Gilmanov, T., Svejcar, T., Johnson, D., Angell, R., Saliendra, N.Z., and Wylie, B., 2006, Long-term dynamics of production, respiration, and net CO<sub>2</sub> exchange in two sagebrush-steppe ecosystems: Rangeland Ecology and Management, v. 59, no. 6, p. 585-599, https://doi.org/10.2111/05-198R1.1.","productDescription":"15 p.","startPage":"585","endPage":"599","numberOfPages":"15","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":491482,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://hdl.handle.net/10150/643112","text":"External Repository"},{"id":209834,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2111/05-198R1.1"},{"id":236563,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"59","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4984e4b0c8380cd6869b","contributors":{"authors":[{"text":"Gilmanov, T.G.","contributorId":44716,"corporation":false,"usgs":true,"family":"Gilmanov","given":"T.G.","email":"","affiliations":[],"preferred":false,"id":420806,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Svejcar, T.J.","contributorId":29087,"corporation":false,"usgs":true,"family":"Svejcar","given":"T.J.","email":"","affiliations":[],"preferred":false,"id":420804,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Johnson, D.A.","contributorId":61370,"corporation":false,"usgs":true,"family":"Johnson","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":420807,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Angell, R.F.","contributorId":30019,"corporation":false,"usgs":true,"family":"Angell","given":"R.F.","email":"","affiliations":[],"preferred":false,"id":420805,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Saliendra, Nicanor Z.","contributorId":16623,"corporation":false,"usgs":true,"family":"Saliendra","given":"Nicanor","email":"","middleInitial":"Z.","affiliations":[],"preferred":false,"id":420802,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Wylie, B.K. 0000-0002-7374-1083","orcid":"https://orcid.org/0000-0002-7374-1083","contributorId":24877,"corporation":false,"usgs":true,"family":"Wylie","given":"B.K.","affiliations":[],"preferred":false,"id":420803,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70028974,"text":"70028974 - 2006 - Stability of landsat-4 thematic mapper outgassing models","interactions":[],"lastModifiedDate":"2012-03-12T17:20:57","indexId":"70028974","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Stability of landsat-4 thematic mapper outgassing models","docAbstract":"Oscillations in radiometric gains of the short wave infrared (SWIR) bands in Landsat-4 (L4) and Landsat-5 (L5) Thematic Mappers (TMs) are observed through an analysis of detector responses to the Internal Calibrator (IC) pulses. The oscillations are believed to be caused by an interference effect due to a contaminant film buildup on the window of the cryogenically cooled dewar that houses these detectors. This process of contamination, referred to as outgassing effects, has been well characterized using an optical thin-film model that relates detector responses to the accumulated film thickness and its growth rate. The current models for L4 TM are based on average detector responses to the second brightest IC lamp and have been derived from three data sets acquired during different times throughout the instrument's lifetime. Unlike in L5 TM outgassing characterization, it was found that the L4 TM responses to all three IC lamps can be used to provide accurate characterization and correction for outgassing effects. The analysis of single detector responses revealed an up to five percent difference in the estimated oscillating periods and also indicated a gradual variation of contaminant growth rate over the focal plane.","largerWorkTitle":"Proceedings of SPIE - The International Society for Optical Engineering","conferenceTitle":"Earth Observing Systems XI","conferenceDate":"14 August 2006 through 16 August 2006","conferenceLocation":"San Diego, CA","language":"English","doi":"10.1117/12.683264","issn":"0277786X","isbn":"0819463752; 9780819463753","usgsCitation":"Micijevic, E., and Chander, G., 2006, Stability of landsat-4 thematic mapper outgassing models, <i>in</i> Proceedings of SPIE - The International Society for Optical Engineering, v. 6296, San Diego, CA, 14 August 2006 through 16 August 2006, https://doi.org/10.1117/12.683264.","costCenters":[],"links":[{"id":209833,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1117/12.683264"},{"id":236562,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"6296","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9655e4b08c986b31b445","contributors":{"authors":[{"text":"Micijevic, E. 0000-0002-3828-9239","orcid":"https://orcid.org/0000-0002-3828-9239","contributorId":59939,"corporation":false,"usgs":true,"family":"Micijevic","given":"E.","affiliations":[],"preferred":false,"id":420801,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chander, G.","contributorId":51449,"corporation":false,"usgs":true,"family":"Chander","given":"G.","affiliations":[],"preferred":false,"id":420800,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70030504,"text":"70030504 - 2006 - The importance of diverse data types to calibrate a watershed model of the Trout Lake Basin, Northern Wisconsin, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:13","indexId":"70030504","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"The importance of diverse data types to calibrate a watershed model of the Trout Lake Basin, Northern Wisconsin, USA","docAbstract":"As part of the USGS Water, Energy, and Biogeochemical Budgets project and the NSF Long-Term Ecological Research work, a parameter estimation code was used to calibrate a deterministic groundwater flow model of the Trout Lake Basin in northern Wisconsin. Observations included traditional calibration targets (head, lake stage, and baseflow observations) as well as unconventional targets such as groundwater flows to and from lakes, depth of a lake water plume, and time of travel. The unconventional data types were important for parameter estimation convergence and allowed the development of a more detailed parameterization capable of resolving model objectives with well-constrained parameter values. Independent estimates of groundwater inflow to lakes were most important for constraining lakebed leakance and the depth of the lake water plume was important for determining hydraulic conductivity and conceptual aquifer layering. The most important target overall, however, was a conventional regional baseflow target that led to correct distribution of flow between sub-basins and the regional system during model calibration. The use of an automated parameter estimation code: (1) facilitated the calibration process by providing a quantitative assessment of the model's ability to match disparate observed data types; and (2) allowed assessment of the influence of observed targets on the calibration process. The model calibration required the use of a 'universal' parameter estimation code in order to include all types of observations in the objective function. The methods described in this paper help address issues of watershed complexity and non-uniqueness common to deterministic watershed models. ?? 2005 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jhydrol.2005.08.005","issn":"00221694","usgsCitation":"Hunt, R.J., Feinstein, D.T., Pint, C., and Anderson, M.P., 2006, The importance of diverse data types to calibrate a watershed model of the Trout Lake Basin, Northern Wisconsin, USA: Journal of Hydrology, v. 321, no. 1-4, p. 286-296, https://doi.org/10.1016/j.jhydrol.2005.08.005.","startPage":"286","endPage":"296","numberOfPages":"11","costCenters":[],"links":[{"id":212072,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jhydrol.2005.08.005"},{"id":239488,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"321","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bacf4e4b08c986b323886","contributors":{"authors":[{"text":"Hunt, R. J.","contributorId":40164,"corporation":false,"usgs":true,"family":"Hunt","given":"R.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":427398,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Feinstein, D. T.","contributorId":47328,"corporation":false,"usgs":true,"family":"Feinstein","given":"D.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":427399,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Pint, C.D.","contributorId":90535,"corporation":false,"usgs":true,"family":"Pint","given":"C.D.","affiliations":[],"preferred":false,"id":427400,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Anderson, Marilyn P.","contributorId":102970,"corporation":false,"usgs":true,"family":"Anderson","given":"Marilyn","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":427401,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70030501,"text":"70030501 - 2006 - Estimates of suspended sediment entering San Francisco Bay from the Sacramento and San Joaquin Delta, San Francisco Bay, California","interactions":[],"lastModifiedDate":"2018-09-25T09:34:09","indexId":"70030501","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Estimates of suspended sediment entering San Francisco Bay from the Sacramento and San Joaquin Delta, San Francisco Bay, California","docAbstract":"<p>This study demonstrates the use of suspended-sediment concentration (SSC) data collected at Mallard Island as a means of determining suspended-sediment load entering San Francisco Bay from the Sacramento and San Joaquin River watersheds. Optical backscatter (OBS) data were collected every 15 min during water years (WYs) 1995-2003 and converted to SSC. Daily fluvial advective sediment load was estimated by combining estimated Delta outflow with daily averaged SSC. On days when no data were available, SSC was estimated using linear interpolation. A model was developed to estimate the landward dispersive load using velocity and SSC data collected during WYs 1994 and 1996. The advective and dispersive loads were summed to estimate the total load. Annual suspended-sediment load at Mallard Island averaged 1.2??0.4 Mt (million metric tonnes). Given that the average water discharge for the 1995-2003 period was greater than the long -term average discharge, it seems likely that the average suspended-sediment load may be less than 1.2??0.4 Mt. Average landward dispersive load was 0.24 Mt/yr, 20% of the total. On average during the wet season, 88% of the annual suspended-sediment load was discharged through the Delta and 43% occurred during the wettest 30-day period. The January 1997 flood transported 1.2 Mt of suspended sediment or about 11% of the total 9-year load (10.9 Mt). Previous estimates of sediment load at Mallard Island are about a factor of 3 greater because they lacked data downstream from riverine gages and sediment load has decreased. Decreasing suspended-sediment loads may increase erosion in the Bay, help to cause remobilization of buried contaminants, and reduce the supply of sediment for restoration projects. ?? 2005 Elsevier B.V. All rights reserved.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jhydrol.2005.09.006","issn":"00221694","usgsCitation":"McKee, L., Ganju, N., and Schoellhamer, D., 2006, Estimates of suspended sediment entering San Francisco Bay from the Sacramento and San Joaquin Delta, San Francisco Bay, California: Journal of Hydrology, v. 323, no. 1-4, p. 335-352, https://doi.org/10.1016/j.jhydrol.2005.09.006.","startPage":"335","endPage":"352","numberOfPages":"18","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":552,"text":"San Francisco Bay-Delta","active":false,"usgs":true},{"id":5079,"text":"Pacific Regional Director's Office","active":true,"usgs":true}],"links":[{"id":212044,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jhydrol.2005.09.006"},{"id":239452,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"323","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0af1e4b0c8380cd524ca","contributors":{"authors":[{"text":"McKee, L.J.","contributorId":84562,"corporation":false,"usgs":true,"family":"McKee","given":"L.J.","email":"","affiliations":[],"preferred":false,"id":427388,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ganju, N. K. 0000-0002-1096-0465","orcid":"https://orcid.org/0000-0002-1096-0465","contributorId":64782,"corporation":false,"usgs":true,"family":"Ganju","given":"N. K.","affiliations":[],"preferred":false,"id":427387,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Schoellhamer, D. H. 0000-0001-9488-7340","orcid":"https://orcid.org/0000-0001-9488-7340","contributorId":85624,"corporation":false,"usgs":true,"family":"Schoellhamer","given":"D. H.","affiliations":[],"preferred":false,"id":427389,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030494,"text":"70030494 - 2006 - Quantitative methods to direct exploration based on hydrogeologic information","interactions":[],"lastModifiedDate":"2012-03-12T17:21:04","indexId":"70030494","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2340,"text":"Journal of Hydroinformatics","active":true,"publicationSubtype":{"id":10}},"title":"Quantitative methods to direct exploration based on hydrogeologic information","docAbstract":"Quantitatively Directed Exploration (QDE) approaches based on information such as model sensitivity, input data covariance and model output covariance are presented. Seven approaches for directing exploration are developed, applied, and evaluated on a synthetic hydrogeologic site. The QDE approaches evaluate input information uncertainty, subsurface model sensitivity and, most importantly, output covariance to identify the next location to sample. Spatial input parameter values and covariances are calculated with the multivariate conditional probability calculation from a limited number of samples. A variogram structure is used during data extrapolation to describe the spatial continuity, or correlation, of subsurface information. Model sensitivity can be determined by perturbing input data and evaluating output response or, as in this work, sensitivities can be programmed directly into an analysis model. Output covariance is calculated by the First-Order Second Moment (FOSM) method, which combines the covariance of input information with model sensitivity. A groundwater flow example, modeled in MODFLOW-2000, is chosen to demonstrate the seven QDE approaches. MODFLOW-2000 is used to obtain the piezometric head and the model sensitivity simultaneously. The seven QDE approaches are evaluated based on the accuracy of the modeled piezometric head after information from a QDE sample is added. For the synthetic site used in this study, the QDE approach that identifies the location of hydraulic conductivity that contributes the most to the overall piezometric head variance proved to be the best method to quantitatively direct exploration. ?? IWA Publishing 2006.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydroinformatics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2166/hydro.2006.006","issn":"14647141","usgsCitation":"Graettinger, A., Lee, J., Reeves, H.W., and Dethan, D., 2006, Quantitative methods to direct exploration based on hydrogeologic information: Journal of Hydroinformatics, v. 8, no. 2, p. 77-90, https://doi.org/10.2166/hydro.2006.006.","startPage":"77","endPage":"90","numberOfPages":"14","costCenters":[],"links":[{"id":477450,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.2166/hydro.2006.006","text":"Publisher Index Page"},{"id":239309,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211927,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2166/hydro.2006.006"}],"volume":"8","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a9220e4b0c8380cd8068e","contributors":{"authors":[{"text":"Graettinger, A.J.","contributorId":105884,"corporation":false,"usgs":true,"family":"Graettinger","given":"A.J.","email":"","affiliations":[],"preferred":false,"id":427357,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lee, J.","contributorId":58596,"corporation":false,"usgs":true,"family":"Lee","given":"J.","affiliations":[],"preferred":false,"id":427355,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Reeves, H. W.","contributorId":53739,"corporation":false,"usgs":true,"family":"Reeves","given":"H.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":427354,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dethan, D.","contributorId":99740,"corporation":false,"usgs":true,"family":"Dethan","given":"D.","email":"","affiliations":[],"preferred":false,"id":427356,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70030487,"text":"70030487 - 2006 - Magnesium content within the skeletal architecture of the coral <i>Montastraea faveolata</i>: locations of brucite precipitation and implications to fine-scale data fluctuations","interactions":[],"lastModifiedDate":"2014-10-09T14:30:16","indexId":"70030487","displayToPublicDate":"2006-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1338,"text":"Coral Reefs","active":true,"publicationSubtype":{"id":10}},"title":"Magnesium content within the skeletal architecture of the coral <i>Montastraea faveolata</i>: locations of brucite precipitation and implications to fine-scale data fluctuations","docAbstract":"Small portions of coral cores were analyzed using a high-resolution laser ablation inductively coupled plasma mass spectrometer (LA ICP-MS) to determine the geochemical signatures within and among specific skeletal structures in the large framework coral, <i>Montastraea faveolata</i>. Vertical transects were sampled along three parallel skeletal structures: endothecal (septal flank), corallite wall, and exothecal (costal flank) areas. The results demonstrate that trace element levels varied among the three structures. Magnesium (Mg) varied among adjacent structures and was most abundant within the exothecal portion of the skeleton. Scanning electron microscopy (SEM) revealed the presence of hexagonal crystals forming thick discs, pairs or doublets of individual crystals, and rosettes in several samples. High Mg within these crystals was confirmed with energy dispersive spectroscopy (EDS), infrared spectrometry, and LA ICP-MS. The chemical composition is consistent with the mineral brucite [Mg(OH<sub>2</sub>)]. These crystals are located exclusively in the exothecal area of the skeleton, are often associated with green endolithic algae, and are commonly associated with increased Mg levels found in the adjacent corallite walls. Although scattered throughout the exothecal, the brucite crystals are concentrated within green bands where levels of Mg increase substantially relative to other portions of the skeleton. The presence and locations of high-Mg crystals may explain the fine-scale fluctuations in Mg data researchers have been questioning for years.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Coral Reefs","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Springer","doi":"10.1007/s00338-006-0092-y","issn":"07224028","usgsCitation":"Buster, N., and Holmes, C.W., 2006, Magnesium content within the skeletal architecture of the coral <i>Montastraea faveolata</i>: locations of brucite precipitation and implications to fine-scale data fluctuations: Coral Reefs, v. 25, no. 2, p. 243-253, https://doi.org/10.1007/s00338-006-0092-y.","productDescription":"11 p.","startPage":"243","endPage":"253","numberOfPages":"11","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":211838,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s00338-006-0092-y"},{"id":239208,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Florida","volume":"25","issue":"2","noUsgsAuthors":false,"publicationDate":"2006-03-09","publicationStatus":"PW","scienceBaseUri":"505a4b58e4b0c8380cd69498","contributors":{"authors":[{"text":"Buster, N.A.","contributorId":105518,"corporation":false,"usgs":true,"family":"Buster","given":"N.A.","affiliations":[],"preferred":false,"id":427336,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Holmes, C. W.","contributorId":36076,"corporation":false,"usgs":true,"family":"Holmes","given":"C.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":427335,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
]}