{"pageNumber":"2379","pageRowStart":"59450","pageSize":"25","recordCount":185069,"records":[{"id":70031835,"text":"70031835 - 2007 - Characterization of methane hydrate host sediments using synchrotron-computed microtomography (CMT)","interactions":[],"lastModifiedDate":"2017-10-05T19:10:00","indexId":"70031835","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2419,"text":"Journal of Petroleum Science and Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Characterization of methane hydrate host sediments using synchrotron-computed microtomography (CMT)","docAbstract":"The hydrate-sediment interaction is an important aspect of gas hydrate studies that needs further examination. We describe here the applicability of the computed microtomography (CMT) technique that utilizes an intense X-ray synchrotron source to characterize sediment samples, two at various depths from the Blake Ridge area (a well-known hydrate-prone region) and one from Georges Bank, that once contained methane trapped as hydrates. Detailed results of the tomographic analysis performed on the deepest sample (667??m) from Blake Ridge are presented as 2-D and 3-D images which show several mineral constituents, the internal grain/pore microstructure, and, following segmentation into pore and grain space, a visualization of the connecting pathways through the pore-space of the sediment. Various parameters obtained from the analysis of the CMT data are presented for all three sediment samples. The micro-scale porosity values showed decreasing trend with increasing depth for all three samples that is consistent with the previously reported bulk porosity data. The 3-D morphology, pore-space pathways, porosity, and permeability values are also reported for all three samples. The application of CMT is now being expanded to the laboratory-formed samples of hydrate in sediments as well as field samples of methane hydrate bearing sediments.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Petroleum Science and Engineering","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.petrol.2006.03.029","issn":"09204105","usgsCitation":"Jones, K., Feng, H., Tomov, S., Winters, W., Prodanovic, M., and Mahajan, D., 2007, Characterization of methane hydrate host sediments using synchrotron-computed microtomography (CMT): Journal of Petroleum Science and Engineering, v. 56, no. 1-3, p. 136-145, https://doi.org/10.1016/j.petrol.2006.03.029.","productDescription":"10 p.","startPage":"136","endPage":"145","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":477039,"rank":1,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://hdl.handle.net/1912/1742","text":"External Repository"},{"id":242783,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"Blake Ridge, Georges Bank","volume":"56","issue":"1-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f4cfe4b0c8380cd4bf2f","contributors":{"authors":[{"text":"Jones, K.W.","contributorId":21692,"corporation":false,"usgs":true,"family":"Jones","given":"K.W.","email":"","affiliations":[],"preferred":false,"id":433353,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Feng, H.","contributorId":9885,"corporation":false,"usgs":true,"family":"Feng","given":"H.","email":"","affiliations":[],"preferred":false,"id":433351,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Tomov, S.","contributorId":105930,"corporation":false,"usgs":true,"family":"Tomov","given":"S.","email":"","affiliations":[],"preferred":false,"id":433356,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Winters, W.J.","contributorId":49796,"corporation":false,"usgs":true,"family":"Winters","given":"W.J.","email":"","affiliations":[],"preferred":false,"id":433355,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Prodanovic, M.","contributorId":12280,"corporation":false,"usgs":true,"family":"Prodanovic","given":"M.","email":"","affiliations":[],"preferred":false,"id":433352,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Mahajan, D.","contributorId":42019,"corporation":false,"usgs":true,"family":"Mahajan","given":"D.","affiliations":[],"preferred":false,"id":433354,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031834,"text":"70031834 - 2007 - Evidence for exploitative competition: Comparative foraging behavior and roosting ecology of short-tailed fruit bats (Phyllostomidae)","interactions":[],"lastModifiedDate":"2012-03-12T17:21:25","indexId":"70031834","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1045,"text":"Biotropica","active":true,"publicationSubtype":{"id":10}},"title":"Evidence for exploitative competition: Comparative foraging behavior and roosting ecology of short-tailed fruit bats (Phyllostomidae)","docAbstract":"Chestnut short-tailed bats, Carollia castanea, and Seba's short-tailed bats, C. perspicillata (Phyllostomidae), were radio-tracked (N = 1593 positions) in lowland rain forest at Tiputini Biodiversity Station, Orellana Province, Ecuador. For 11 C. castanea, mean home range was 6.8 ?? 2.2 ha, mean core-use area was 1.7 ?? 0.8 ha, and mean long axis across home range was 438 ?? 106 m. For three C. perspicillata, mean home range was 5.5 ?? 1.7 ha, mean core-use area was 1.3 ?? 0.6 ha, and mean long axis was 493 ?? 172 m. Groups of less than five C. castanea occupied day-roosts in earthen cavities that undercut banks the Tiputini River. Carollia perspicillata used tree hollows and buildings as day-roosts. Interspecific and intraspecific overlap among short-tailed bats occurred in core-use areas associated with clumps of fruiting Piper hispidum (peppers) and Cecropia sciadophylla. Piper hispidum seeds were present in 80 percent of the fecal samples from C. castanea and 56 percent of samples from C. perspicillata. Carollia perspicillata handled pepper fruits significantly faster than C. castanea; however, C. castanea commenced foraging before C. perspicillata emerged from day-roosts. Evidence for exploitative competition between C. castanea and C. perspicillata is suggested by our observations that 95 percent of ripe P. hispidum fruits available at sunset disappear before sunrise (N = 74 marked fruits). Piper hispidum plants produced zero to 12 ripe infructescences per plant each night during peak production. Few ripe infructescences of P. hispidum were available during the dry season; however, ripe infructescences of C. sciadophylla, remained abundant. ?? 2007 The Author(s) Journal compilation ?? 2007 by The Association for Tropical Biology and Conservation.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Biotropica","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1744-7429.2006.00251.x","issn":"00063606","usgsCitation":"Bonaccorso, F., Winkelmann, J., Shin, D., Agrawal, C., Aslami, N., Bonney, C., Hsu, A., Jekielek, P., Knox, A., Kopach, S., Jennings, T., Lasky, J., Menesale, S., Richards, J., Rutland, J., Sessa, A., Zhaurova, L., and Kunz, T., 2007, Evidence for exploitative competition: Comparative foraging behavior and roosting ecology of short-tailed fruit bats (Phyllostomidae): Biotropica, v. 39, no. 2, p. 249-256, https://doi.org/10.1111/j.1744-7429.2006.00251.x.","startPage":"249","endPage":"256","numberOfPages":"8","costCenters":[],"links":[{"id":503854,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://zotero.org/groups/5435545/items/XBJGRW72","text":"External Repository"},{"id":215017,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1744-7429.2006.00251.x"},{"id":242782,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"39","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-01-18","publicationStatus":"PW","scienceBaseUri":"505a0d3ee4b0c8380cd52ecf","contributors":{"authors":[{"text":"Bonaccorso, F.J.","contributorId":13041,"corporation":false,"usgs":true,"family":"Bonaccorso","given":"F.J.","email":"","affiliations":[],"preferred":false,"id":433333,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Winkelmann, J.R.","contributorId":35969,"corporation":false,"usgs":true,"family":"Winkelmann","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":433336,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Shin, D.","contributorId":55229,"corporation":false,"usgs":true,"family":"Shin","given":"D.","email":"","affiliations":[],"preferred":false,"id":433343,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Agrawal, C.I.","contributorId":21362,"corporation":false,"usgs":true,"family":"Agrawal","given":"C.I.","email":"","affiliations":[],"preferred":false,"id":433334,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Aslami, N.","contributorId":40821,"corporation":false,"usgs":true,"family":"Aslami","given":"N.","email":"","affiliations":[],"preferred":false,"id":433337,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Bonney, C.","contributorId":35560,"corporation":false,"usgs":true,"family":"Bonney","given":"C.","email":"","affiliations":[],"preferred":false,"id":433335,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Hsu, A.","contributorId":76151,"corporation":false,"usgs":true,"family":"Hsu","given":"A.","email":"","affiliations":[],"preferred":false,"id":433345,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Jekielek, P.E.","contributorId":71018,"corporation":false,"usgs":true,"family":"Jekielek","given":"P.E.","email":"","affiliations":[],"preferred":false,"id":433344,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Knox, A.K.","contributorId":88170,"corporation":false,"usgs":true,"family":"Knox","given":"A.K.","email":"","affiliations":[],"preferred":false,"id":433347,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Kopach, S.J.","contributorId":44374,"corporation":false,"usgs":true,"family":"Kopach","given":"S.J.","email":"","affiliations":[],"preferred":false,"id":433338,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Jennings, T.D.","contributorId":79719,"corporation":false,"usgs":true,"family":"Jennings","given":"T.D.","email":"","affiliations":[],"preferred":false,"id":433346,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Lasky, J.R.","contributorId":53187,"corporation":false,"usgs":true,"family":"Lasky","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":433342,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Menesale, S.A.","contributorId":44375,"corporation":false,"usgs":true,"family":"Menesale","given":"S.A.","email":"","affiliations":[],"preferred":false,"id":433339,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Richards, J.H.","contributorId":49164,"corporation":false,"usgs":true,"family":"Richards","given":"J.H.","email":"","affiliations":[],"preferred":false,"id":433340,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Rutland, J.A.","contributorId":106333,"corporation":false,"usgs":true,"family":"Rutland","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":433350,"contributorType":{"id":1,"text":"Authors"},"rank":15},{"text":"Sessa, A.K.","contributorId":52005,"corporation":false,"usgs":true,"family":"Sessa","given":"A.K.","email":"","affiliations":[],"preferred":false,"id":433341,"contributorType":{"id":1,"text":"Authors"},"rank":16},{"text":"Zhaurova, L.","contributorId":98964,"corporation":false,"usgs":true,"family":"Zhaurova","given":"L.","email":"","affiliations":[],"preferred":false,"id":433348,"contributorType":{"id":1,"text":"Authors"},"rank":17},{"text":"Kunz, T.H.","contributorId":103383,"corporation":false,"usgs":true,"family":"Kunz","given":"T.H.","email":"","affiliations":[],"preferred":false,"id":433349,"contributorType":{"id":1,"text":"Authors"},"rank":18}]}}
,{"id":70031808,"text":"70031808 - 2007 - Why the sacramento delta area differs from other parts of the great valley: numerical modeling of thermal structure and thermal subsidence of forearc basins","interactions":[],"lastModifiedDate":"2014-09-09T10:49:37","indexId":"70031808","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2125,"text":"Izvestiya, Physics of the Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Why the sacramento delta area differs from other parts of the great valley: numerical modeling of thermal structure and thermal subsidence of forearc basins","docAbstract":"<p>Data on present-day heat flow, subsidence history, and paleotemperature for the Sacramento Delta region, California, have been employed to constrain a numerical model of tectonic subsidence and thermal evolution of forearc basins. The model assumes an oceanic basement with an initial thermal profile dependent on its age subjected to refrigeration caused by a subducting slab. Subsidence in the Sacramento Delta region appears to be close to that expected for a forearc basin underlain by normal oceanic lithosphere of age 150 Ma, demonstrating that effects from both the initial thermal profile and the subduction process are necessary and sufficient. Subsidence at the eastern and northern borders of the Sacramento Valley is considerably less, approximating subsidence expected from the dynamics of the subduction zone alone. These results, together with other geophysical data, show that Sacramento Delta lithosphere, being thinner and having undergone deeper subsidence, must differ from lithosphere of the transitional type under other parts of the Sacramento Valley. Thermal modeling allows evaluation of the rheological properties of the lithosphere. Strength diagrams based on our thermal model show that, even under relatively slow deformation (10<sup>−17</sup> s<sup>−1</sup>), the upper part of the delta crystalline crust (down to 20–22 km) can fail in brittle fashion, which is in agreement with deeper earthquake occurrence. Hypocentral depths of earthquakes under the Sacramento Delta region extend to nearly 20 km, whereas, in the Coast Ranges to the west, depths are typically less than 12–15 km. The greater width of the seismogenic zone in this area raises the possibility that, for fault segments of comparable length, earthquakes of somewhat greater magnitude might occur than in the Coast Ranges to the west.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Izvestiya, Physics of the Solid Earth","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Springer","doi":"10.1134/S1069351307010089","issn":"10693513","usgsCitation":"Mikhailov, V., Parsons, T., Simpson, R., Timoshkina, E., and Williams, C., 2007, Why the sacramento delta area differs from other parts of the great valley: numerical modeling of thermal structure and thermal subsidence of forearc basins: Izvestiya, Physics of the Solid Earth, v. 43, no. 1, p. 75-90, https://doi.org/10.1134/S1069351307010089.","productDescription":"16 p.","startPage":"75","endPage":"90","numberOfPages":"16","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":212254,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1134/S1069351307010089"},{"id":239714,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Great Valley","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -122.0,36.0 ], [ -122.0,40.0 ], [ -120.0,40.0 ], [ -120.0,36.0 ], [ -122.0,36.0 ] ] ] } } ] }","volume":"43","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bd0a6e4b08c986b32efa7","contributors":{"authors":[{"text":"Mikhailov, V.O.","contributorId":101455,"corporation":false,"usgs":true,"family":"Mikhailov","given":"V.O.","email":"","affiliations":[],"preferred":false,"id":433216,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Parsons, T.","contributorId":48288,"corporation":false,"usgs":true,"family":"Parsons","given":"T.","email":"","affiliations":[],"preferred":false,"id":433213,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Simpson, R.W.","contributorId":76738,"corporation":false,"usgs":true,"family":"Simpson","given":"R.W.","email":"","affiliations":[],"preferred":false,"id":433214,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Timoshkina, E.P.","contributorId":79295,"corporation":false,"usgs":true,"family":"Timoshkina","given":"E.P.","email":"","affiliations":[],"preferred":false,"id":433215,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Williams, C.","contributorId":10514,"corporation":false,"usgs":true,"family":"Williams","given":"C.","affiliations":[],"preferred":false,"id":433212,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031805,"text":"70031805 - 2007 - On the influence of substrate morphology and surface area on phytofauna","interactions":[],"lastModifiedDate":"2012-03-12T17:21:15","indexId":"70031805","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"title":"On the influence of substrate morphology and surface area on phytofauna","docAbstract":"The independent effects and interactions between substrate morphology and substrate surface area on invertebrate density or biomass colonizing artificial plant beds were assessed in a clear-water and a turbid playa lake in Castro County, Texas, USA. Total invertebrate density and biomass were consistently greater on filiform substrates than on laminar substrates with equivalent substrate surface areas. The relationship among treatments (substrates with different morphologies and surface areas) and response (invertebrate density or biomass) was assessed with equally spaced surface areas. Few statistically significant interactions between substrate morphology and surface area were detected, indicating that these factors were mostly independent from each other in their effect on colonizing invertebrates. Although infrequently, when substrate morphology and surface area were not independent, the effects of equally spaced changes in substrate surface area on the rate of change of phytofauna density or biomass per unit of substrate surface area were dependent upon substrate morphology. The absence of three-way interactions indicated that effects of substrate morphology and substrate area on phytofauna density or biomass were independent of environmental conditions outside and inside exclosures. ?? 2006 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrobiologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10750-006-0359-x","issn":"00188158","usgsCitation":"Becerra-Munoz, S., and Schramm, H., 2007, On the influence of substrate morphology and surface area on phytofauna: Hydrobiologia, v. 575, no. 1, p. 117-128, https://doi.org/10.1007/s10750-006-0359-x.","startPage":"117","endPage":"128","numberOfPages":"12","costCenters":[],"links":[{"id":212195,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10750-006-0359-x"},{"id":239645,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"575","issue":"1","noUsgsAuthors":false,"publicationDate":"2006-09-23","publicationStatus":"PW","scienceBaseUri":"505a6dd9e4b0c8380cd7535c","contributors":{"authors":[{"text":"Becerra-Munoz, S.","contributorId":12691,"corporation":false,"usgs":true,"family":"Becerra-Munoz","given":"S.","email":"","affiliations":[],"preferred":false,"id":433204,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schramm, H.L. Jr.","contributorId":103823,"corporation":false,"usgs":true,"family":"Schramm","given":"H.L.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":433205,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031803,"text":"70031803 - 2007 - Individual dietary specialization and dive behaviour in the California sea otter: Using archival time-depth data to detect alternative foraging strategies","interactions":[],"lastModifiedDate":"2012-03-12T17:21:06","indexId":"70031803","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1371,"text":"Deep-Sea Research Part II: Topical Studies in Oceanography","active":true,"publicationSubtype":{"id":10}},"title":"Individual dietary specialization and dive behaviour in the California sea otter: Using archival time-depth data to detect alternative foraging strategies","docAbstract":"The existence of individual prey specializations has been reported for an ever-growing number of taxa, and has important ramifications for our understanding of predator-prey dynamics. We use the California sea otter population as a case study to validate the use of archival time-depth data to detect and measure differences in foraging behaviour and diet. We collected observational foraging data from radio-tagged sea otters that had been equipped with Mk9 time depth recorders (TDRs, Wildlife Computers, Redmond, WA). After recapturing the study animals and retrieving the TDRs it was possible to compare the two data types, by matching individual dives from the TDR record with observational data and thus examining behavioural correlates of capture success and prey species. Individuals varied with respect to prey selection, aggregating into one of three distinct dietary specializations. A number of TDR-derived parameters, particularly dive depth and post-dive surface interval, differed predictably between specialist types. A combination of six dive parameters was particularly useful for discriminating between specialist types, and when incorporated into a multivariate cluster analysis, these six parameters resulted in classification of 13 adult female sea otters into three clusters that corresponded almost perfectly to the diet-based classification (1 out of 13 animals was misclassified). Thus based solely on quantifiable traits of time-depth data that have been collected over an appropriate period (in this case 1 year per animal), it was possible to assign female sea otters to diet type with >90% accuracy. TDR data can thus be used as a tool to measure the degree of individual specialization in sea otter populations, a conclusion that will likely apply to other diving marine vertebrates as well. Our ultimate goals must be both to understand the causes of individual specialization, and to incorporate such variation into models of population- and community-level food web dynamics. ?? 2007 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Deep-Sea Research Part II: Topical Studies in Oceanography","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.dsr2.2006.11.012","issn":"09670645","usgsCitation":"Tinker, M.T., Costa, D., Estes, J.A., and Wieringa, N., 2007, Individual dietary specialization and dive behaviour in the California sea otter: Using archival time-depth data to detect alternative foraging strategies: Deep-Sea Research Part II: Topical Studies in Oceanography, v. 54, no. 3-4, p. 330-342, https://doi.org/10.1016/j.dsr2.2006.11.012.","startPage":"330","endPage":"342","numberOfPages":"13","costCenters":[],"links":[{"id":212642,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.dsr2.2006.11.012"},{"id":240158,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"54","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3a9ce4b0c8380cd61e05","contributors":{"authors":[{"text":"Tinker, M. T. 0000-0002-3314-839X","orcid":"https://orcid.org/0000-0002-3314-839X","contributorId":54152,"corporation":false,"usgs":false,"family":"Tinker","given":"M.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":433197,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Costa, D.P.","contributorId":29210,"corporation":false,"usgs":true,"family":"Costa","given":"D.P.","affiliations":[],"preferred":false,"id":433195,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Estes, J. A.","contributorId":53319,"corporation":false,"usgs":true,"family":"Estes","given":"J.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":433196,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Wieringa, N.","contributorId":99372,"corporation":false,"usgs":true,"family":"Wieringa","given":"N.","email":"","affiliations":[],"preferred":false,"id":433198,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031801,"text":"70031801 - 2007 - Assessment of fecal pollution sources in a small northern-plains watershed using PCR and phylogenetic analyses of Bacteroidetes 16S rRNA gene","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70031801","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1619,"text":"FEMS Microbiology Ecology","onlineIssn":"1574-6941","printIssn":"0168-6496","active":true,"publicationSubtype":{"id":10}},"title":"Assessment of fecal pollution sources in a small northern-plains watershed using PCR and phylogenetic analyses of Bacteroidetes 16S rRNA gene","docAbstract":"We evaluated the efficacy, sensitivity, host-specificity, and spatial/temporal dynamics of human- and ruminant-specific 16S rRNA gene Bacteroidetes markers used to assess the sources of fecal pollution in a fecally impacted watershed. Phylogenetic analyses of 1271 fecal and environmental 16S rRNA gene clones were also performed to study the diversity of Bacteroidetes in this watershed. The host-specific assays indicated that ruminant feces were present in 28-54% of the water samples and in all sampling seasons, with increasing frequency in downstream sites. The human-targeted assays indicated that only 3-5% of the water samples were positive for human fecal signals, although a higher percentage of human-associated signals (19-24%) were detected in sediment samples. Phylogenetic analysis indicated that 57% of all water clones clustered with yet-to-be-cultured Bacteroidetes species associated with sequences obtained from ruminant feces, further supporting the prevalence of ruminant contamination in this watershed. However, since several clusters contained sequences from multiple sources, future studies need to consider the potential cosmopolitan nature of these bacterial populations when assessing fecal pollution sources using Bacteroidetes markers. Moreover, additional data is needed in order to understand the distribution of Bacteroidetes host-specific markers and their relationship to water quality regulatory standards. ?? 2006 Federation of European Microbiological Societies.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"FEMS Microbiology Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1574-6941.2006.00211.x","issn":"01686496","usgsCitation":"Lamendella, R., Domingo, J., Oerther, D., Vogel, J.R., and Stoeckel, D.M., 2007, Assessment of fecal pollution sources in a small northern-plains watershed using PCR and phylogenetic analyses of Bacteroidetes 16S rRNA gene: FEMS Microbiology Ecology, v. 59, no. 3, p. 651-660, https://doi.org/10.1111/j.1574-6941.2006.00211.x.","startPage":"651","endPage":"660","numberOfPages":"10","costCenters":[],"links":[{"id":477107,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1574-6941.2006.00211.x","text":"Publisher Index Page"},{"id":212611,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1574-6941.2006.00211.x"},{"id":240124,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"59","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ee2fe4b0c8380cd49bf5","contributors":{"authors":[{"text":"Lamendella, R.","contributorId":15833,"corporation":false,"usgs":true,"family":"Lamendella","given":"R.","email":"","affiliations":[],"preferred":false,"id":433186,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Domingo, J.W.S.","contributorId":88153,"corporation":false,"usgs":true,"family":"Domingo","given":"J.W.S.","email":"","affiliations":[],"preferred":false,"id":433189,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Oerther, D.B.","contributorId":93702,"corporation":false,"usgs":true,"family":"Oerther","given":"D.B.","email":"","affiliations":[],"preferred":false,"id":433190,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Vogel, J. R.","contributorId":21639,"corporation":false,"usgs":true,"family":"Vogel","given":"J.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":433187,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Stoeckel, D. M.","contributorId":84855,"corporation":false,"usgs":true,"family":"Stoeckel","given":"D.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":433188,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031777,"text":"70031777 - 2007 - Evasion of added isotopic mercury from a northern temperate lake","interactions":[],"lastModifiedDate":"2018-10-16T11:11:46","indexId":"70031777","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1571,"text":"Environmental Toxicology and Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"Evasion of added isotopic mercury from a northern temperate lake","docAbstract":"<p>Isotopically enriched Hg (90% 202Hg) was added to a small lake in Ontario, Canada, at a rate equivalent to approximately threefold the annual direct atmospheric deposition rate that is typical of the northeastern United States. The Hg spike was thoroughly mixed into the epilimnion in nine separate events at two-week intervals throughout the summer growing season for three consecutive years. We measured concentrations of spike and ambient dissolved gaseous Hg (DGM) concentrations in surface water and the rate of volatilization of Hg from the lake on four separate, week-long sampling periods using floating dynamic flux chambers. The relationship between empirically measured rates of spike-Hg evasion were evaluated as functions of DGM concentration, wind velocity, and solar illumination. No individual environmental variable proved to be a strong predictor of the evasion flux. The DGM-normalized flux (expressed as the mass transfer coefficient, k) varied with wind velocity in a manner consistent with existing models of evasion of volatile solutes from natural waters but was higher than model estimates at low wind velocity. The empirical data were used to construct a description of evasion flux as a function of total dissolved Hg, wind, and solar illumination. That model was then applied to data for three summers for the experiment to generate estimates of Hg re-emission from the lake surface to the atmosphere. Based on ratios of spike Hg to ambient Hg in DGM and dissolved total Hg pools, ratios of DGM to total Hg in spike and ambient Hg pools, and flux estimates of spike and ambient Hg, we concluded that the added Hg spike was chemically indistinguishable from the ambient Hg in its behavior. Approximately 45% of Hg added to the lake over the summer was lost via volatilization.&nbsp;</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Toxicology and Chemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1897/06-148R.1","issn":"07307268","usgsCitation":"Southworth, G., Lindberg, S., Hintelmann, H., Amyot, M., Poulain, A., Bogle, M., Peterson, M., Rudd, J., Harris, R., Sandilands, K., Krabbenhoft, D., and Olsen, M.L., 2007, Evasion of added isotopic mercury from a northern temperate lake: Environmental Toxicology and Chemistry, v. 26, no. 1, p. 53-60, https://doi.org/10.1897/06-148R.1.","productDescription":"8 p.","startPage":"53","endPage":"60","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":212311,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1897/06-148R.1"},{"id":239777,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Canada","city":"Ontario","volume":"26","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-01-01","publicationStatus":"PW","scienceBaseUri":"505a0d21e4b0c8380cd52e25","contributors":{"authors":[{"text":"Southworth, G.","contributorId":51095,"corporation":false,"usgs":true,"family":"Southworth","given":"G.","email":"","affiliations":[],"preferred":false,"id":433073,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lindberg, S.","contributorId":71341,"corporation":false,"usgs":true,"family":"Lindberg","given":"S.","email":"","affiliations":[],"preferred":false,"id":433076,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hintelmann, H.","contributorId":64423,"corporation":false,"usgs":true,"family":"Hintelmann","given":"H.","email":"","affiliations":[],"preferred":false,"id":433075,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Amyot, M.","contributorId":85404,"corporation":false,"usgs":true,"family":"Amyot","given":"M.","email":"","affiliations":[],"preferred":false,"id":433080,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Poulain, A.","contributorId":86171,"corporation":false,"usgs":true,"family":"Poulain","given":"A.","email":"","affiliations":[],"preferred":false,"id":433081,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Bogle, M.","contributorId":71384,"corporation":false,"usgs":true,"family":"Bogle","given":"M.","email":"","affiliations":[],"preferred":false,"id":433077,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Peterson, M.","contributorId":71514,"corporation":false,"usgs":true,"family":"Peterson","given":"M.","affiliations":[],"preferred":false,"id":433078,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Rudd, J.","contributorId":92054,"corporation":false,"usgs":true,"family":"Rudd","given":"J.","email":"","affiliations":[],"preferred":false,"id":433082,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Harris, R. 0000-0002-9247-0768","orcid":"https://orcid.org/0000-0002-9247-0768","contributorId":13382,"corporation":false,"usgs":true,"family":"Harris","given":"R.","affiliations":[],"preferred":false,"id":433072,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Sandilands, K.","contributorId":101456,"corporation":false,"usgs":true,"family":"Sandilands","given":"K.","affiliations":[],"preferred":false,"id":433083,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Krabbenhoft, David P. 0000-0003-1964-5020 dpkrabbe@usgs.gov","orcid":"https://orcid.org/0000-0003-1964-5020","contributorId":118001,"corporation":false,"usgs":true,"family":"Krabbenhoft","given":"David P.","email":"dpkrabbe@usgs.gov","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":677,"text":"Wisconsin Water Science Center","active":true,"usgs":true}],"preferred":false,"id":433079,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Olsen, Mark L.","contributorId":63852,"corporation":false,"usgs":true,"family":"Olsen","given":"Mark","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":433074,"contributorType":{"id":1,"text":"Authors"},"rank":12}]}}
,{"id":70031776,"text":"70031776 - 2007 - Tag-based estimates of annual fishing mortality of a mixed atlantic coastal stock of striped bass","interactions":[],"lastModifiedDate":"2012-03-12T17:21:13","indexId":"70031776","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3624,"text":"Transactions of the American Fisheries Society","active":true,"publicationSubtype":{"id":10}},"title":"Tag-based estimates of annual fishing mortality of a mixed atlantic coastal stock of striped bass","docAbstract":"Tag-based estimates of annual survival and fishing mortality rates supplement annual stock assessments of migratory striped bass Morone saxatilis in the interjurisdictional fishery along the Atlantic coast. We estimated a 17-year time series of annual survival and fishing mortality (F) rates for striped bass (>711 mm) tagged during winter trawl studies (1988-2004) off the coasts of North Carolina and Virginia. The geographic and temporal distributions of tag recoveries were consistent with published patterns of striped bass migration and indicated that this southern overwintering aggregate of striped bass is composed of mixed stocks. Incremental increases in bias-adjusted annual fishing mortality rates (from 0.00-0.26) and decreases in the proportion of fish released alive (from 0.762-0.198) coincided with periods of regulatory change during the 17-year time frame. Our estimates of F fall below the current management triggers and should be considered along with other estimates of F within the striped bass management process.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Transactions of the American Fisheries Society","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1577/T05-319.1","issn":"00028487","usgsCitation":"Welsh, S., Smith, D., Laney, R., and Tipton, R., 2007, Tag-based estimates of annual fishing mortality of a mixed atlantic coastal stock of striped bass: Transactions of the American Fisheries Society, v. 136, no. 1, p. 34-42, https://doi.org/10.1577/T05-319.1.","startPage":"34","endPage":"42","numberOfPages":"9","costCenters":[],"links":[{"id":239745,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212282,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/T05-319.1"}],"volume":"136","issue":"1","noUsgsAuthors":false,"publicationDate":"2011-01-09","publicationStatus":"PW","scienceBaseUri":"505ba3b7e4b08c986b31fe3e","contributors":{"authors":[{"text":"Welsh, S.A. 0000-0003-0362-054X","orcid":"https://orcid.org/0000-0003-0362-054X","contributorId":10191,"corporation":false,"usgs":true,"family":"Welsh","given":"S.A.","affiliations":[],"preferred":false,"id":433068,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Smith, D. R. 0000-0001-6074-9257","orcid":"https://orcid.org/0000-0001-6074-9257","contributorId":44108,"corporation":false,"usgs":true,"family":"Smith","given":"D. R.","affiliations":[{"id":365,"text":"Leetown Science Center","active":true,"usgs":true}],"preferred":false,"id":433069,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Laney, R.W.","contributorId":47651,"corporation":false,"usgs":true,"family":"Laney","given":"R.W.","email":"","affiliations":[],"preferred":false,"id":433070,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Tipton, R.C.","contributorId":50056,"corporation":false,"usgs":true,"family":"Tipton","given":"R.C.","email":"","affiliations":[],"preferred":false,"id":433071,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031775,"text":"70031775 - 2007 - Origin of pingo-like features on the Beaufort Sea shelf and their possible relationship to decomposing methane gas hydrates","interactions":[],"lastModifiedDate":"2023-10-06T12:04:48.491142","indexId":"70031775","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1807,"text":"Geophysical Research Letters","active":true,"publicationSubtype":{"id":10}},"title":"Origin of pingo-like features on the Beaufort Sea shelf and their possible relationship to decomposing methane gas hydrates","docAbstract":"<div class=\"\"><div class=\"article-section__content en main\"><p><span class=\"paraNumber\">[1]<span>&nbsp;</span></span>The Arctic shelf is currently undergoing dramatic thermal changes caused by the continued warming associated with Holocene sea level rise. During this transgression, comparatively warm waters have flooded over cold permafrost areas of the Arctic Shelf. A thermal pulse of more than 10°C is still propagating down into the submerged sediment and may be decomposing gas hydrate as well as permafrost. A search for gas venting on the Arctic seafloor focused on pingo-like-features (PLFs) on the Beaufort Sea Shelf because they may be a direct consequence of gas hydrate decomposition at depth. Vibracores collected from eight PLFs had systematically elevated methane concentrations. ROV observations revealed streams of methane-rich gas bubbles coming from the crests of PLFs. We offer a scenario of how PLFs may be growing offshore as a result of gas pressure associated with gas hydrate decomposition.</p></div></div>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2006GL027977","issn":"00948276","usgsCitation":"Paull, C.K., Ussler, W., Dallimore, S., Blasco, S., Lorenson, T., Melling, H., Medioli, B., Nixon, F., and McLaughlin, F., 2007, Origin of pingo-like features on the Beaufort Sea shelf and their possible relationship to decomposing methane gas hydrates: Geophysical Research Letters, v. 34, no. 1, L01603, 5 p., https://doi.org/10.1029/2006GL027977.","productDescription":"L01603, 5 p.","costCenters":[],"links":[{"id":487032,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006gl027977","text":"Publisher Index Page"},{"id":239744,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Canada","otherGeospatial":"Beaufort Sea","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -140.904114772788,\n              70.21376494965077\n            ],\n            [\n              -140.904114772788,\n              68.05566376560725\n            ],\n            [\n              -130.79669289778812,\n              68.05566376560725\n            ],\n            [\n              -130.79669289778812,\n              70.21376494965077\n            ],\n            [\n              -140.904114772788,\n              70.21376494965077\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"34","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-01-05","publicationStatus":"PW","scienceBaseUri":"505a70ebe4b0c8380cd7633a","contributors":{"authors":[{"text":"Paull, C. K.","contributorId":86845,"corporation":false,"usgs":false,"family":"Paull","given":"C.","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":433065,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ussler, W. III","contributorId":101048,"corporation":false,"usgs":true,"family":"Ussler","given":"W.","suffix":"III","affiliations":[],"preferred":false,"id":433066,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Dallimore, S.R.","contributorId":44313,"corporation":false,"usgs":true,"family":"Dallimore","given":"S.R.","email":"","affiliations":[],"preferred":false,"id":433061,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Blasco, S.M.","contributorId":106714,"corporation":false,"usgs":true,"family":"Blasco","given":"S.M.","email":"","affiliations":[],"preferred":false,"id":433067,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Lorenson, T.D.","contributorId":7715,"corporation":false,"usgs":true,"family":"Lorenson","given":"T.D.","email":"","affiliations":[],"preferred":false,"id":433060,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Melling, H.","contributorId":54797,"corporation":false,"usgs":true,"family":"Melling","given":"H.","email":"","affiliations":[],"preferred":false,"id":433062,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Medioli, B.E.","contributorId":82529,"corporation":false,"usgs":true,"family":"Medioli","given":"B.E.","email":"","affiliations":[],"preferred":false,"id":433064,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Nixon, F.M.","contributorId":70555,"corporation":false,"usgs":true,"family":"Nixon","given":"F.M.","email":"","affiliations":[],"preferred":false,"id":433063,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"McLaughlin, F.A.","contributorId":6663,"corporation":false,"usgs":true,"family":"McLaughlin","given":"F.A.","email":"","affiliations":[],"preferred":false,"id":433059,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}}
,{"id":70031773,"text":"70031773 - 2007 - FFT-enhanced IHS transform method for fusing high-resolution satellite images","interactions":[],"lastModifiedDate":"2012-03-12T17:21:14","indexId":"70031773","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1958,"text":"ISPRS Journal of Photogrammetry and Remote Sensing","active":true,"publicationSubtype":{"id":10}},"title":"FFT-enhanced IHS transform method for fusing high-resolution satellite images","docAbstract":"Existing image fusion techniques such as the intensity-hue-saturation (IHS) transform and principal components analysis (PCA) methods may not be optimal for fusing the new generation commercial high-resolution satellite images such as Ikonos and QuickBird. One problem is color distortion in the fused image, which causes visual changes as well as spectral differences between the original and fused images. In this paper, a fast Fourier transform (FFT)-enhanced IHS method is developed for fusing new generation high-resolution satellite images. This method combines a standard IHS transform with FFT filtering of both the panchromatic image and the intensity component of the original multispectral image. Ikonos and QuickBird data are used to assess the FFT-enhanced IHS transform method. Experimental results indicate that the FFT-enhanced IHS transform method may improve upon the standard IHS transform and the PCA methods in preserving spectral and spatial information. ?? 2006 International Society for Photogrammetry and Remote Sensing, Inc. (ISPRS).","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"ISPRS Journal of Photogrammetry and Remote Sensing","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.isprsjprs.2006.11.002","issn":"09242716","usgsCitation":"Ling, Y., Ehlers, M., Usery, E., and Madden, M., 2007, FFT-enhanced IHS transform method for fusing high-resolution satellite images: ISPRS Journal of Photogrammetry and Remote Sensing, v. 61, no. 6, p. 381-392, https://doi.org/10.1016/j.isprsjprs.2006.11.002.","startPage":"381","endPage":"392","numberOfPages":"12","costCenters":[],"links":[{"id":212252,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.isprsjprs.2006.11.002"},{"id":239712,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"61","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0e73e4b0c8380cd5346d","contributors":{"authors":[{"text":"Ling, Y.","contributorId":31578,"corporation":false,"usgs":true,"family":"Ling","given":"Y.","email":"","affiliations":[],"preferred":false,"id":433054,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ehlers, M.","contributorId":60437,"corporation":false,"usgs":true,"family":"Ehlers","given":"M.","email":"","affiliations":[],"preferred":false,"id":433056,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Usery, E.L.","contributorId":45355,"corporation":false,"usgs":true,"family":"Usery","given":"E.L.","email":"","affiliations":[],"preferred":false,"id":433055,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Madden, M.","contributorId":18068,"corporation":false,"usgs":true,"family":"Madden","given":"M.","email":"","affiliations":[],"preferred":false,"id":433053,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031770,"text":"70031770 - 2007 - Two lithospheric profiles across southern California derived from gravity and seismic data","interactions":[],"lastModifiedDate":"2020-04-28T14:52:06.103758","indexId":"70031770","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2304,"text":"Journal of Geodynamics","active":true,"publicationSubtype":{"id":10}},"title":"Two lithospheric profiles across southern California derived from gravity and seismic data","docAbstract":"<div id=\"abstracts\" class=\"Abstracts u-font-serif\"><div id=\"aep-abstract-id27\" class=\"abstract author\"><div id=\"aep-abstract-sec-id28\"><p>We present two detailed 2-D density transects for the crust and uppermost mantle across southern California using a linear gravity inversion technique. This technique parameterizes the crust and upper mantle as a set of blocks that are based on published geologic and seismic models. Each block can have a range of densities that are constrained where possible by borehole measurements, seismic velocities, and petrologic data. To further constrain the models, it is assumed that the lithosphere is close to isostatic equilibrium at both ends of the profiles, in the deep ocean and east of the Mojave Desert. We calculate the lithostatic pressure variations field for the whole cross section to rule out the geophysically insignificant solutions. In the linear equation,<span>&nbsp;</span><i>ρ</i>&nbsp;=&nbsp;<i>a</i>&nbsp;+&nbsp;<i>bV</i><span>&nbsp;</span>(<i>V</i>, seismic P-wave velocity;<span>&nbsp;</span><i>ρ</i>, density), which approximates the mantle density–velocity (<i>ρ</i>–<i>V</i>) relationship, different coefficients for<span>&nbsp;</span><i>b</i><span>&nbsp;</span>were evaluated. Lower coefficients (<i>b</i>&nbsp;&lt;&nbsp;0.2) correspond to an almost purely thermally perturbed mantle, while higher coefficients (<i>b</i>&nbsp;&gt;&nbsp;0.3) imply that other effects, such as composition and/or metamorphic changes, play an important role in the mantle. Density models were constructed with the coefficient<span>&nbsp;</span><i>b</i><span>&nbsp;</span>ranging from 0 to 0.6. The results indicate that a high<span>&nbsp;</span><i>b</i><span>&nbsp;</span>value in the mantle<span>&nbsp;</span><i>ρ</i>–<i>V</i><span>&nbsp;</span>relationship is associated with less dense crust in the Mojave block and more dense crust in the Catalina schist block. In the less dense Mojave block, the average density of the whole crust is ∼2.75&nbsp;g/cm<sup>3</sup>, while that of the lower crust is ∼2.72&nbsp;g/cm<sup>3</sup>. These densities imply a high silica content in the crust, and a minor fraction of basic rock in the lower crust, or perhaps the absence of a basaltic layer altogether. By comparison, the average density of a typical continental stable platform is ∼2.85&nbsp;g/cm<sup>3</sup>. Models with higher<span>&nbsp;</span><i>b</i><span>&nbsp;</span>coefficients (0.5–0.6) are characterized by a large isostatic imbalance. On the other hand, lower<span>&nbsp;</span><i>b</i><span>&nbsp;</span>values (0–0.2) require a consolidated whole crust density in the Mojave Desert of ∼2.78&nbsp;g/cm<sup>3</sup>, and a lower crust density of ∼2.89&nbsp;g/cm<sup>3</sup><span>&nbsp;</span>with mostly basaltic composition. This contradicts the observed, lower<span>&nbsp;</span><i>V</i><sub>p</sub>/<i>V</i><sub>s</sub>-ratio in the Mojave Desert associated with mostly felsic and low-density crust. Models with lower<span>&nbsp;</span><i>b</i><span>&nbsp;</span>coefficients (0.1–0.2) are characterized by an absence of local Airy compensation beneath the San Gabriel Mountains at the LARSE-1 profile. These, and other non-gravity arguments, suggest optimal solutions to the mantle<span>&nbsp;</span><i>ρ</i>–<i>V</i><span>&nbsp;</span>relation of<span>&nbsp;</span><i>b</i>&nbsp;∼&nbsp;0.2–0.4. This, in turn, means that both thermal and petrological effects occur inside the downwelling of the uppermost mantle high velocity body located beneath the Transverse Ranges. During the development of this mantle downwelling, the basaltic layer of the Mojave block was likely eroded and pulled down into the high velocity body. Those basaltic fragments may have been transformed into eclogites, and this metamorphic change implies a higher<span>&nbsp;</span><i>b</i>-coefficient density–velocity relationship than would be expected for a purely thermal process.</p></div></div></div>","largerWorkTitle":"","language":"English","publisher":"Elsevier","doi":"10.1016/j.jog.2006.09.011","issn":"02643707","usgsCitation":"Romanyuk, T., Mooney, W.D., and Detweiler, S.T., 2007, Two lithospheric profiles across southern California derived from gravity and seismic data: Journal of Geodynamics, v. 43, no. 2, p. 274-307, https://doi.org/10.1016/j.jog.2006.09.011.","productDescription":"34 p.","startPage":"274","endPage":"307","numberOfPages":"34","costCenters":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"links":[{"id":239643,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United 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,{"id":70031687,"text":"70031687 - 2007 - Nutrient (N, P) loads and yields at multiple scales and subbasin types in the Yukon River basin, Alaska","interactions":[],"lastModifiedDate":"2018-01-30T19:37:24","indexId":"70031687","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2319,"text":"Journal of Geophysical Research G: Biogeosciences","active":true,"publicationSubtype":{"id":10}},"title":"Nutrient (N, P) loads and yields at multiple scales and subbasin types in the Yukon River basin, Alaska","docAbstract":"Loads and yields of dissolved and particulate nitrogen (N) and phosphorus (P) were measured and modeled at three locations on the Yukon River (YR) and on the Tanana and Porcupine Rivers in Alaska during 2001-2005. Total export of N and P upstream of Yukon Delta averaged 120 Gg N a-1 and 56 Gg P a-1, respectively, with 43.5% of total N (TN) as dissolved organic N, and 98% of total P (TP) as particulate phosphorus. Approximately half of the annual export of TN and TP occurred during spring. Hydrologic yields ofTN (5.6-13.3 mmol N m-2 a-1) and TP (0.8-9.0 mmol P m-2 a-1) were least in the Porcupine basin and greatest in the Tanana basin and were proportional to water yield. Comparison of current and historical dissolved organic matter (DOM) export from the basin indicates decreased DON export with respect to total water discharge during summer and autumn in recent decades. Any possible climate-related change in annual water discharge will result in proportional changes in N and P export.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research G: Biogeosciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2006JG000366","issn":"01480227","usgsCitation":"Dornblaser, M., and Striegl, R.G., 2007, Nutrient (N, P) loads and yields at multiple scales and subbasin types in the Yukon River basin, Alaska: Journal of Geophysical Research G: Biogeosciences, v. 112, no. 4, https://doi.org/10.1029/2006JG000366.","costCenters":[],"links":[{"id":477148,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006jg000366","text":"Publisher Index Page"},{"id":239837,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212364,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2006JG000366"}],"volume":"112","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-11-03","publicationStatus":"PW","scienceBaseUri":"505a6937e4b0c8380cd73c09","contributors":{"authors":[{"text":"Dornblaser, M.M.","contributorId":38765,"corporation":false,"usgs":true,"family":"Dornblaser","given":"M.M.","email":"","affiliations":[],"preferred":false,"id":432695,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Striegl, Robert G. 0000-0002-8251-4659 rstriegl@usgs.gov","orcid":"https://orcid.org/0000-0002-8251-4659","contributorId":1630,"corporation":false,"usgs":true,"family":"Striegl","given":"Robert","email":"rstriegl@usgs.gov","middleInitial":"G.","affiliations":[{"id":36183,"text":"Hydro-Ecological Interactions Branch","active":true,"usgs":true},{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true}],"preferred":false,"id":432696,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031686,"text":"70031686 - 2007 - Geologic characteristics of the central stretch of the Ticona Channel, north-central Illinois","interactions":[],"lastModifiedDate":"2012-03-12T17:21:12","indexId":"70031686","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1541,"text":"Environmental Geosciences","active":true,"publicationSubtype":{"id":10}},"title":"Geologic characteristics of the central stretch of the Ticona Channel, north-central Illinois","docAbstract":"The Ticona Channel is located in north-central Illinois and occurs in Grundy, LaSalle, and Putnam counties. It is a buried bedrock valley that served as the principal paleodrainage system in north-central Illinois during the Illinoian and pre-Illinoian. This study focused on the part of the Ticona Channel within the Leonore 7.5??? Quadrangle. The geometry and stratigraphy of sediments that fill the Ticona Channel were investigated using high-resolution, shallow seismic reflection profiling, traditional field geologic mapping techniques, borehole data, and water-well-log data. The valley is about 2 km (1 mi) wide and approximately 60 m (200 ft) deep. The U-shape channel is straight, trends east-west, and has only one mappable tributary. The valley is carved into the Pennsylvanian Carbondale Formation in the eastern part of the study area; it has incised into the Ordovician Prairie du Chien Group in the west. At its base, the Ticona Channel is filled with the Pearl Formation, which is coarse-grained sand and gravel that was deposited during the Illinoian glaciation. The Pearl Formation is overlain by Illinoian till of the Glasford Formation and is capped by Wedron Group sediments from the Wisconsinan stage. Copyright ?? 2007. The American Association of Petroleum Geologists/Division of Environmental Geosciences. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Geosciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1306/eg.05030606002","issn":"10759565","usgsCitation":"Willems, B., Malone, D., and Pugin, A., 2007, Geologic characteristics of the central stretch of the Ticona Channel, north-central Illinois: Environmental Geosciences, v. 14, no. 3, p. 123-136, https://doi.org/10.1306/eg.05030606002.","startPage":"123","endPage":"136","numberOfPages":"14","costCenters":[],"links":[{"id":212363,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1306/eg.05030606002"},{"id":239836,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"14","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1935e4b0c8380cd558e9","contributors":{"authors":[{"text":"Willems, B.A.","contributorId":78208,"corporation":false,"usgs":true,"family":"Willems","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":432693,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Malone, D.H.","contributorId":92124,"corporation":false,"usgs":true,"family":"Malone","given":"D.H.","email":"","affiliations":[],"preferred":false,"id":432694,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Pugin, A.","contributorId":10953,"corporation":false,"usgs":true,"family":"Pugin","given":"A.","affiliations":[],"preferred":false,"id":432692,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031684,"text":"70031684 - 2007 - Frequent transmission of immunodeficiency viruses among bobcats and pumas","interactions":[],"lastModifiedDate":"2012-03-12T17:21:12","indexId":"70031684","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2497,"text":"Journal of Virology","active":true,"publicationSubtype":{"id":10}},"title":"Frequent transmission of immunodeficiency viruses among bobcats and pumas","docAbstract":"With the exception of human immunodeficiency virus (HIV), which emerged in humans after cross-species transmissions of simian immunodeficiency viruses from nonhuman primates, immunodeficiency viruses of the family Lentiviridae represent species-specific viruses that rarely cross species barriers to infect new hosts. Among the Felidae, numerous immunodeficiency-like lentiviruses have been documented, but only a few cross-species transmissions have been recorded, and these have not been perpetuated in the recipient species. Lentivirus seroprevalence was determined for 79 bobcats (Lynx rufus) and 31 pumas (Puma concolor) from well-defined populations in Southern California. Partial genomic sequences were subsequently obtained from 18 and 12 seropositive bobcats and pumas, respectively. Genotypes were analyzed for phylogenic relatedness and genotypic composition among the study set and archived feline lentivirus sequences. This investigation of feline immunodeficiency virus infection in bobcats and pumas of Southern California provides evidence that cross-species infection has occurred frequently among these animals. The data suggest that transmission has occurred in multiple locations and are most consistent with the spread of the virus from bobcats to pumas. Although the ultimate causes remain unknown, these transmission events may occur as a result of puma predation on bobcats, a situation similar to that which fostered transmission of HIV to humans, and likely represent the emergence of a lentivirus with relaxed barriers to cross-species transmission. This unusual observation provides a valuable opportunity to evaluate the ecological, behavioral, and molecular conditions that favor repeated transmissions and persistence of lentivirus between species. Copyright ?? 2007, American Society for Microbiology. All Rights Reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Virology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1128/JVI.00997-07","issn":"0022538X","usgsCitation":"Franklin, S., Troyer, J., TerWee, J., Lyren, L., Boyce, W., Riley, S., Roelke, M., Crooks, K., and VandeWoude, S., 2007, Frequent transmission of immunodeficiency viruses among bobcats and pumas: Journal of Virology, v. 81, no. 20, p. 10961-10969, https://doi.org/10.1128/JVI.00997-07.","startPage":"10961","endPage":"10969","numberOfPages":"9","costCenters":[],"links":[{"id":477142,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://www.ncbi.nlm.nih.gov/pmc/articles/2045550","text":"External Repository"},{"id":212336,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1128/JVI.00997-07"},{"id":239804,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"81","issue":"20","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a13d8e4b0c8380cd547df","contributors":{"authors":[{"text":"Franklin, S.P.","contributorId":87368,"corporation":false,"usgs":true,"family":"Franklin","given":"S.P.","email":"","affiliations":[],"preferred":false,"id":432684,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Troyer, J.L.","contributorId":10224,"corporation":false,"usgs":true,"family":"Troyer","given":"J.L.","email":"","affiliations":[],"preferred":false,"id":432676,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"TerWee, J.A.","contributorId":76133,"corporation":false,"usgs":true,"family":"TerWee","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":432681,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lyren, L.M.","contributorId":11983,"corporation":false,"usgs":true,"family":"Lyren","given":"L.M.","email":"","affiliations":[],"preferred":false,"id":432677,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Boyce, W.M.","contributorId":12266,"corporation":false,"usgs":true,"family":"Boyce","given":"W.M.","email":"","affiliations":[],"preferred":false,"id":432678,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Riley, S.P.D.","contributorId":86157,"corporation":false,"usgs":true,"family":"Riley","given":"S.P.D.","email":"","affiliations":[],"preferred":false,"id":432683,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Roelke, M.E.","contributorId":48931,"corporation":false,"usgs":true,"family":"Roelke","given":"M.E.","email":"","affiliations":[],"preferred":false,"id":432679,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Crooks, K.R.","contributorId":81679,"corporation":false,"usgs":true,"family":"Crooks","given":"K.R.","email":"","affiliations":[],"preferred":false,"id":432682,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"VandeWoude, S.","contributorId":74953,"corporation":false,"usgs":true,"family":"VandeWoude","given":"S.","affiliations":[],"preferred":false,"id":432680,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}}
,{"id":70175347,"text":"70175347 - 2007 - Spatial and temporal structure of macroinvertebrate assemblages, San Francisco Bay salt ponds","interactions":[],"lastModifiedDate":"2016-08-05T13:14:57","indexId":"70175347","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Spatial and temporal structure of macroinvertebrate assemblages, San Francisco Bay salt ponds","docAbstract":"<p>No abstract available.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Society of Wetland Scientists International Conference","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"Society of Wetland Scientists International Conference","conferenceDate":"June 2007","conferenceLocation":"Sacramento, CA","language":"English","publisher":"Society of Wetland Scientists","usgsCitation":"Miles, A., Spring, S., Ricca, M., Takekawa, J., Athearn, N., and Schoellhamer, D., 2007, Spatial and temporal structure of macroinvertebrate assemblages, San Francisco Bay salt ponds, <i>in</i> Society of Wetland Scientists International Conference, Sacramento, CA, June 2007, p. 51-51.","productDescription":"1 p.","startPage":"51","endPage":"51","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"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":326141,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"57a5b8dae4b0ebae89b78a45","contributors":{"authors":[{"text":"Miles, A.K. 0000-0002-3108-808X","orcid":"https://orcid.org/0000-0002-3108-808X","contributorId":85902,"corporation":false,"usgs":true,"family":"Miles","given":"A.K.","affiliations":[],"preferred":false,"id":644822,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Spring, S.E.","contributorId":35258,"corporation":false,"usgs":true,"family":"Spring","given":"S.E.","email":"","affiliations":[],"preferred":false,"id":644823,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ricca, M.A.","contributorId":103609,"corporation":false,"usgs":true,"family":"Ricca","given":"M.A.","affiliations":[],"preferred":false,"id":644824,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Takekawa, J.T.","contributorId":173477,"corporation":false,"usgs":false,"family":"Takekawa","given":"J.T.","email":"","affiliations":[],"preferred":false,"id":644825,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Athearn, N.D.","contributorId":86958,"corporation":false,"usgs":true,"family":"Athearn","given":"N.D.","affiliations":[],"preferred":false,"id":644826,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"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":644827,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031683,"text":"70031683 - 2007 - Does amplitude scaling of ground motion records result in biased nonlinear structural drift responses?","interactions":[],"lastModifiedDate":"2012-03-12T17:21:12","indexId":"70031683","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1434,"text":"Earthquake Engineering and Structural Dynamics","active":true,"publicationSubtype":{"id":10}},"title":"Does amplitude scaling of ground motion records result in biased nonlinear structural drift responses?","docAbstract":"Limitations of the existing earthquake ground motion database lead to scaling of records to obtain seismograms consistent with a ground motion target for structural design and evaluation. In the engineering seismology community, acceptable limits for 'legitimate' scaling vary from one (no scaling allowed) to 10 or more. The concerns expressed by detractors of scaling are mostly based on the knowledge of, for example, differences in ground motion characteristics for different earthquake magnitude-distance (Mw-Rclose) scenarios, and much less on their effects on structures. At the other end of the spectrum, proponents have demonstrated that scaling is not only legitimate but also useful for assessing structural response statistics for Mw-Rclose scenarios. Their studies, however, have not investigated more recent purposes of scaling and have not always drawn conclusions for a wide spectrum of structural vibration periods and strengths. This article investigates whether scaling of records randomly selected from an Mw-Rclose bin (or range) to a target fundamental-mode spectral acceleration (Sa) level introduces bias in the expected nonlinear structural drift response of both single-degree-of-freedom oscillators and one multi-degree-of-freedom building. The bias is quantified relative to unscaled records from the target Mw-Rclose bin that are 'naturally' at the target Sa level. We consider scaling of records from the target Mw-Rclose bin and from other Mw-Rclose bins. The results demonstrate that scaling can indeed introduce a bias that, for the most part, ca be explained by differences between the elastic response spectra of the scaled versus unscaled records. Copyright ?? 2007 John Wiley & Sons, Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Earthquake Engineering and Structural Dynamics","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/eqe.695","issn":"00988847","usgsCitation":"Luco, N., and Bazzurro, P., 2007, Does amplitude scaling of ground motion records result in biased nonlinear structural drift responses?: Earthquake Engineering and Structural Dynamics, v. 36, no. 13, p. 1813-1835, https://doi.org/10.1002/eqe.695.","startPage":"1813","endPage":"1835","numberOfPages":"23","costCenters":[],"links":[{"id":212335,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/eqe.695"},{"id":239803,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"36","issue":"13","noUsgsAuthors":false,"publicationDate":"2007-06-22","publicationStatus":"PW","scienceBaseUri":"505a038ae4b0c8380cd50512","contributors":{"authors":[{"text":"Luco, N.","contributorId":34240,"corporation":false,"usgs":true,"family":"Luco","given":"N.","email":"","affiliations":[],"preferred":false,"id":432674,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bazzurro, P.","contributorId":90537,"corporation":false,"usgs":true,"family":"Bazzurro","given":"P.","email":"","affiliations":[],"preferred":false,"id":432675,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031671,"text":"70031671 - 2007 - Cross-shelf transport of pink shrimp larvae: Interactions of tidal currents, larval vertical migrations and internal tides","interactions":[],"lastModifiedDate":"2016-03-30T13:29:29","indexId":"70031671","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2663,"text":"Marine Ecology Progress Series","active":true,"publicationSubtype":{"id":10}},"title":"Cross-shelf transport of pink shrimp larvae: Interactions of tidal currents, larval vertical migrations and internal tides","docAbstract":"<p><span>Transport and behavior of pink shrimp&nbsp;</span><i>Farfantepenaeu</i><span>s&nbsp;</span><i>duorarum</i><span>&nbsp;larvae were investigated on the southwestern Florida (SWF) shelf of the Gulf of Mexico between the Dry Tortugas spawning grounds and Florida Bay nursery grounds. Stratified plankton samples and hydrographic data were collected at 2 h intervals at 3 stations located on a cross-shelf transect. At the Marquesas station, midway between Dry Tortugas and Florida Bay, internal tides were recognized by anomalously cool water, a shallow thermocline with strong density gradients, strong current shear, and a high concentration of pink shrimp larvae at the shallow thermocline. Low Richardson numbers occurred at the pycnocline depth, indicating vertical shear instability and possible turbulent transport from the lower to the upper layer where myses and postlarvae were concentrated. Analysis of vertically stratified plankton suggested that larvae perform vertical migrations and the specific behavior changes ontogenetically; protozoeae were found deeper than myses, and myses deeper than postlarvae. Relative concentrations of protozoea in the upper, middle and bottom layers were consistent with a diel vertical migration, whereas that of postlarvae and myses were consistent with the semidiurnal tides in phase with the flood tide. Postlarvae, the shallowest dwellers that migrate with a semidiurnal periodicity, experienced the largest net onshore flux and larval concentrations were highly correlated with the cross-shelf current. These results provide the first evidence of an onshore tidal transport (a type of selective tidal stream transport, STST), in decapod larvae migrating in continental shelf waters offshore, ca. 100 km from the coast and at a depth of 20 m, while approaching the coastal nursery grounds. Longer time series would be necessary to establish whether internal tides play any role in the larval onshore transport of this species and determine if the STST is the dominant onshore transport mechanism.</span></p>","language":"English","publisher":"Inter-Research","publisherLocation":"Oldendorf/Luhe, Germany","doi":"10.3354/meps06916","issn":"01718630","usgsCitation":"Criales, M.M., Browder, J.A., Mooers, C., Robblee, M., Cardenas, H., and Jackson, T.L., 2007, Cross-shelf transport of pink shrimp larvae: Interactions of tidal currents, larval vertical migrations and internal tides: Marine Ecology Progress Series, v. 345, p. 167-184, https://doi.org/10.3354/meps06916.","productDescription":"18 p.","startPage":"167","endPage":"184","numberOfPages":"18","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":477140,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3354/meps06916","text":"Publisher Index Page"},{"id":239637,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212187,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3354/meps06916"}],"country":"United States","state":"Florida","otherGeospatial":"Dry Tortugas, Florida Bay","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -79.91455078125,\n              25.94816628853973\n            ],\n            [\n              -79.9200439453125,\n              25.54244147012483\n            ],\n            [\n              -80.2166748046875,\n              25.04081549894912\n            ],\n            [\n              -80.8648681640625,\n              24.56211235799689\n            ],\n            [\n              -81.5789794921875,\n              24.412140070651528\n            ],\n            [\n              -82.6336669921875,\n              24.382124181118236\n            ],\n            [\n              -83.07861328125,\n              24.45215015618098\n            ],\n            [\n              -83.1060791015625,\n              24.696934226366672\n            ],\n            [\n              -82.5787353515625,\n              24.806681353851964\n            ],\n            [\n              -81.3262939453125,\n              24.926294766395593\n            ],\n            [\n              -80.760498046875,\n              25.224820176765036\n            ],\n            [\n              -80.4364013671875,\n              25.606855993715016\n            ],\n            [\n              -80.343017578125,\n              25.849336891707605\n            ],\n            [\n              -80.2056884765625,\n              25.93828707492375\n            ],\n            [\n              -80.04638671875,\n              25.96792222903405\n            ],\n            [\n              -79.91455078125,\n              25.94816628853973\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"345","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fcc5e4b0c8380cd4e41a","contributors":{"authors":[{"text":"Criales, Maria M.","contributorId":69330,"corporation":false,"usgs":false,"family":"Criales","given":"Maria","email":"","middleInitial":"M.","affiliations":[{"id":12565,"text":"Rosenstiel School of Atomospheric Science, University of Miami","active":true,"usgs":false}],"preferred":false,"id":432605,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Browder, Joan A.","contributorId":7439,"corporation":false,"usgs":true,"family":"Browder","given":"Joan","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":432601,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mooers, C.N.K.","contributorId":13762,"corporation":false,"usgs":true,"family":"Mooers","given":"C.N.K.","email":"","affiliations":[],"preferred":false,"id":432603,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Robblee, M. B.","contributorId":23879,"corporation":false,"usgs":true,"family":"Robblee","given":"M. B.","affiliations":[],"preferred":false,"id":432604,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Cardenas, H.","contributorId":11411,"corporation":false,"usgs":true,"family":"Cardenas","given":"H.","email":"","affiliations":[],"preferred":false,"id":432602,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Jackson, Thomas L.","contributorId":93667,"corporation":false,"usgs":true,"family":"Jackson","given":"Thomas","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":432606,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031669,"text":"70031669 - 2007 - CO2 storage capacity estimation: Methodology and gaps","interactions":[],"lastModifiedDate":"2012-03-12T17:21:05","indexId":"70031669","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2049,"text":"International Journal of Greenhouse Gas Control","active":true,"publicationSubtype":{"id":10}},"title":"CO2 storage capacity estimation: Methodology and gaps","docAbstract":"Implementation of CO2 capture and geological storage (CCGS) technology at the scale needed to achieve a significant and meaningful reduction in CO2 emissions requires knowledge of the available CO2 storage capacity. CO2 storage capacity assessments may be conducted at various scales-in decreasing order of size and increasing order of resolution: country, basin, regional, local and site-specific. Estimation of the CO2 storage capacity in depleted oil and gas reservoirs is straightforward and is based on recoverable reserves, reservoir properties and in situ CO2 characteristics. In the case of CO2-EOR, the CO2 storage capacity can be roughly evaluated on the basis of worldwide field experience or more accurately through numerical simulations. Determination of the theoretical CO2 storage capacity in coal beds is based on coal thickness and CO2 adsorption isotherms, and recovery and completion factors. Evaluation of the CO2 storage capacity in deep saline aquifers is very complex because four trapping mechanisms that act at different rates are involved and, at times, all mechanisms may be operating simultaneously. The level of detail and resolution required in the data make reliable and accurate estimation of CO2 storage capacity in deep saline aquifers practical only at the local and site-specific scales. This paper follows a previous one on issues and development of standards for CO2 storage capacity estimation, and provides a clear set of definitions and methodologies for the assessment of CO2 storage capacity in geological media. Notwithstanding the defined methodologies suggested for estimating CO2 storage capacity, major challenges lie ahead because of lack of data, particularly for coal beds and deep saline aquifers, lack of knowledge about the coefficients that reduce storage capacity from theoretical to effective and to practical, and lack of knowledge about the interplay between various trapping mechanisms at work in deep saline aquifers. ?? 2007 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"International Journal of Greenhouse Gas Control","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S1750-5836(07)00086-2","issn":"17505836","usgsCitation":"Bachu, S., Bonijoly, D., Bradshaw, J., Burruss, R., Holloway, S., Christensen, N., and Mathiassen, O., 2007, CO2 storage capacity estimation: Methodology and gaps: International Journal of Greenhouse Gas Control, v. 1, no. 4, p. 430-443, https://doi.org/10.1016/S1750-5836(07)00086-2.","startPage":"430","endPage":"443","numberOfPages":"14","costCenters":[],"links":[{"id":477261,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://nora.nerc.ac.uk/id/eprint/4475/1/Abstract.pdf","text":"External Repository"},{"id":240151,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212635,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S1750-5836(07)00086-2"}],"volume":"1","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f2d5e4b0c8380cd4b3f7","contributors":{"authors":[{"text":"Bachu, S.","contributorId":35124,"corporation":false,"usgs":true,"family":"Bachu","given":"S.","email":"","affiliations":[],"preferred":false,"id":432592,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bonijoly, D.","contributorId":51985,"corporation":false,"usgs":true,"family":"Bonijoly","given":"D.","email":"","affiliations":[],"preferred":false,"id":432593,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bradshaw, J.","contributorId":75758,"corporation":false,"usgs":true,"family":"Bradshaw","given":"J.","email":"","affiliations":[],"preferred":false,"id":432595,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Burruss, R.","contributorId":18178,"corporation":false,"usgs":true,"family":"Burruss","given":"R.","affiliations":[],"preferred":false,"id":432590,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Holloway, S.","contributorId":22150,"corporation":false,"usgs":true,"family":"Holloway","given":"S.","email":"","affiliations":[],"preferred":false,"id":432591,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Christensen, N.P.","contributorId":70193,"corporation":false,"usgs":true,"family":"Christensen","given":"N.P.","email":"","affiliations":[],"preferred":false,"id":432594,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Mathiassen, O.M.","contributorId":95275,"corporation":false,"usgs":true,"family":"Mathiassen","given":"O.M.","email":"","affiliations":[],"preferred":false,"id":432596,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70031668,"text":"70031668 - 2007 - Flood regionalization: A hybrid geographic and predictor-variable region-of-influence regression method","interactions":[],"lastModifiedDate":"2012-03-12T17:21:05","indexId":"70031668","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2341,"text":"Journal of Hydrologic Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Flood regionalization: A hybrid geographic and predictor-variable region-of-influence regression method","docAbstract":"To facilitate estimation of streamflow characteristics at an ungauged site, hydrologists often define a region of influence containing gauged sites hydrologically similar to the estimation site. This region can be defined either in geographic space or in the space of the variables that are used to predict streamflow (predictor variables). These approaches are complementary, and a combination of the two may be superior to either. Here we propose a hybrid region-of-influence (HRoI) regression method that combines the two approaches. The new method was applied with streamflow records from 1,091 gauges in the southeastern United States to estimate the 50-year peak flow (Q50). The HRoI approach yielded lower root-mean-square estimation errors and produced fewer extreme errors than either the predictor-variable or geographic region-of-influence approaches. It is concluded, for Q50 in the study region, that similarity with respect to the basin characteristics considered (area, slope, and annual precipitation) is important, but incomplete, and that the consideration of geographic proximity of stations provides a useful surrogate for characteristics that are not included in the analysis. ?? 2007 ASCE.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydrologic Engineering","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1061/(ASCE)1084-0699(2007)12:6(585)","issn":"10840699","usgsCitation":"Eng, K., Milly, P., and Tasker, G.D., 2007, Flood regionalization: A hybrid geographic and predictor-variable region-of-influence regression method: Journal of Hydrologic Engineering, v. 12, no. 6, p. 585-591, https://doi.org/10.1061/(ASCE)1084-0699(2007)12:6(585).","startPage":"585","endPage":"591","numberOfPages":"7","costCenters":[],"links":[{"id":212608,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1061/(ASCE)1084-0699(2007)12:6(585)"},{"id":240116,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"12","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1150e4b0c8380cd53f5f","contributors":{"authors":[{"text":"Eng, K.","contributorId":51063,"corporation":false,"usgs":true,"family":"Eng","given":"K.","email":"","affiliations":[],"preferred":false,"id":432587,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Milly, P. C. D.","contributorId":100489,"corporation":false,"usgs":true,"family":"Milly","given":"P. C. D.","affiliations":[],"preferred":false,"id":432589,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Tasker, Gary D.","contributorId":83097,"corporation":false,"usgs":true,"family":"Tasker","given":"Gary","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":432588,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031667,"text":"70031667 - 2007 - Energy feedbacks of northern high-latitude ecosystems to the climate system due to reduced snow cover during 20th century warming","interactions":[],"lastModifiedDate":"2012-03-12T17:21:05","indexId":"70031667","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1837,"text":"Global Change Biology","active":true,"publicationSubtype":{"id":10}},"title":"Energy feedbacks of northern high-latitude ecosystems to the climate system due to reduced snow cover during 20th century warming","docAbstract":"The warming associated with changes in snow cover in northern high-latitude terrestrial regions represents an important energy feedback to the climate system. Here, we simulate snow cover-climate feedbacks (i.e. changes in snow cover on atmospheric heating) across the Pan-arctic over two distinct warming periods during the 20th century, 1910-1940 and 1970-2000. We offer evidence that increases in snow cover-climate feedbacks during 1970-2000 were nearly three times larger than during 1910-1940 because the recent snow-cover change occurred in spring, when radiation load is highest, rather than in autumn. Based on linear regression analysis, we also detected a greater sensitivity of snow cover-climate feedbacks to temperature trends during the more recent time period. Pan-arctic vegetation types differed substantially in snow cover-climate feedbacks. Those with a high seasonal contrast in albedo, such as tundra, showed much larger changes in atmospheric heating than did those with a low seasonal contrast in albedo, such as forests, even if the changes in snow-cover duration were similar across the vegetation types. These changes in energy exchange warrant careful consideration in studies of climate change, particularly with respect to associated shifts in vegetation between forests, grasslands, and tundra. ?? 2007 Blackwell Publishing Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Global Change Biology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1365-2486.2007.01450.x","issn":"13541013","usgsCitation":"Euskirchen, E., McGuire, A., and Chapin, F., 2007, Energy feedbacks of northern high-latitude ecosystems to the climate system due to reduced snow cover during 20th century warming: Global Change Biology, v. 13, no. 11, p. 2425-2438, https://doi.org/10.1111/j.1365-2486.2007.01450.x.","startPage":"2425","endPage":"2438","numberOfPages":"14","costCenters":[],"links":[{"id":212607,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1365-2486.2007.01450.x"},{"id":240115,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"13","issue":"11","noUsgsAuthors":false,"publicationDate":"2007-09-05","publicationStatus":"PW","scienceBaseUri":"505a0949e4b0c8380cd51e62","contributors":{"authors":[{"text":"Euskirchen, E.S.","contributorId":44737,"corporation":false,"usgs":true,"family":"Euskirchen","given":"E.S.","affiliations":[],"preferred":false,"id":432585,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McGuire, A. D.","contributorId":16552,"corporation":false,"usgs":true,"family":"McGuire","given":"A. D.","affiliations":[],"preferred":false,"id":432584,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Chapin, F.S.","contributorId":48384,"corporation":false,"usgs":true,"family":"Chapin","given":"F.S.","affiliations":[],"preferred":false,"id":432586,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031666,"text":"70031666 - 2007 - Response of bird species densities to habitat structure and fire history along a Midwestern open-forest gradient","interactions":[],"lastModifiedDate":"2016-04-28T13:44:57","indexId":"70031666","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1318,"text":"Condor","active":true,"publicationSubtype":{"id":10}},"title":"Response of bird species densities to habitat structure and fire history along a Midwestern open-forest gradient","docAbstract":"<p>Oak savannas were historically common but are currently rare in the Midwestern United States. We assessed possible associations of bird species with savannas and other threatened habitats in the region by relating fire frequency and vegetation characteristics to seasonal densities of 72 bird species distributed across an open-forest gradient in northwestern Indiana. About one-third of the species did not exhibit statistically significant relationships with any combination of seven vegetation characteristics that included vegetation cover in five vertical strata, dead tree density, and tree height. For 40% of the remaining species, models best predicting species density incorporated tree density. Therefore, management based solely on manipulating tree density may not be an adequate strategy for managing bird populations along this open-forest gradient. Few species exhibited sharp peaks in predicted density under habitat conditions expected in restored savannas, suggesting that few savanna specialists occur among Midwestern bird species. When fire frequency, measured over fifteen years, was added to vegetation characteristics as a predictor of species density, it was incorporated into models for about one-quarter of species, suggesting that fire may modify habitat characteristics in ways that are important for birds but not captured by the structural habitat variables measured. Among those species, similar numbers had peaks in predicted density at low, intermediate, or high fire frequency. For species suggested by previous studies to have a preference for oak savannas along the open-forest gradient, estimated density was maximized at an average fire return interval of about one fire every three years. ?? The Cooper Ornithological Society 2007.</p>","language":"English","publisher":"Cooper Ornithological Society","doi":"10.1650/0010-5422(2007)109[734:ROBSDT]2.0.CO;2","issn":"00105422","usgsCitation":"Grundel, R., and Pavlovic, N., 2007, Response of bird species densities to habitat structure and fire history along a Midwestern open-forest gradient: Condor, v. 109, no. 4, p. 734-749, https://doi.org/10.1650/0010-5422(2007)109[734:ROBSDT]2.0.CO;2.","productDescription":"16 p.","startPage":"734","endPage":"749","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":476963,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://zenodo.org/record/1236383","text":"Publisher Index Page"},{"id":240079,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212576,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1650/0010-5422(2007)109[734:ROBSDT]2.0.CO;2"}],"volume":"109","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aaa37e4b0c8380cd861ed","contributors":{"authors":[{"text":"Grundel, R.","contributorId":37110,"corporation":false,"usgs":true,"family":"Grundel","given":"R.","affiliations":[],"preferred":false,"id":432582,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pavlovic, N.B.","contributorId":105076,"corporation":false,"usgs":true,"family":"Pavlovic","given":"N.B.","email":"","affiliations":[],"preferred":false,"id":432583,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031665,"text":"70031665 - 2007 - Population inertia and its sensitivity to changes in vital rates and population structure","interactions":[],"lastModifiedDate":"2017-12-07T08:45:44","indexId":"70031665","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1465,"text":"Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Population inertia and its sensitivity to changes in vital rates and population structure","docAbstract":"Because the (st)age structure of a population may rarely be stable, studies of transient population dynamics and population momentum are becoming ever more popular. Yet, studies of \"population momentum\" are restricted in the sense that they describe the inertia of population size resulting from a demographic transition to the stationary population growth rate. Although rarely mentioned, inertia in population size is a general phenomenon and can be produced by any demographic transition or perturbation. Because population size is of central importance in demography, conservation, and management, formulas relating the sensitivity of population inertia to changes in underlying vital rates and population structure could provide much-needed insight into the dynamics of populations with unstable (st)age structure. Here, we derive such formulas, which are readily computable, and provide examples of their potential use in studies of life history and applied arenas of population study. ?? 2007 by the Ecological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1890/06-1801.1","issn":"00129658","usgsCitation":"Koons, D.N., Holmes, R.R., and Grand, J.B., 2007, Population inertia and its sensitivity to changes in vital rates and population structure: Ecology, v. 88, no. 11, p. 2857-2867, https://doi.org/10.1890/06-1801.1.","startPage":"2857","endPage":"2867","numberOfPages":"11","costCenters":[],"links":[{"id":240078,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212575,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1890/06-1801.1"}],"volume":"88","issue":"11","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7d7be4b0c8380cd79f8e","contributors":{"authors":[{"text":"Koons, David N.","contributorId":28137,"corporation":false,"usgs":false,"family":"Koons","given":"David","email":"","middleInitial":"N.","affiliations":[{"id":6621,"text":"Colorado State University","active":true,"usgs":false}],"preferred":false,"id":432581,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Holmes, Randall R.","contributorId":201221,"corporation":false,"usgs":false,"family":"Holmes","given":"Randall","email":"","middleInitial":"R.","affiliations":[{"id":13360,"text":"Auburn University","active":true,"usgs":false}],"preferred":false,"id":432580,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Grand, J. Barry 0000-0002-3576-4567 barry_grand@usgs.gov","orcid":"https://orcid.org/0000-0002-3576-4567","contributorId":579,"corporation":false,"usgs":true,"family":"Grand","given":"J.","email":"barry_grand@usgs.gov","middleInitial":"Barry","affiliations":[{"id":198,"text":"Coop Res Unit Atlanta","active":true,"usgs":true}],"preferred":true,"id":432579,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031663,"text":"70031663 - 2007 - Steeply dipping heaving bedrock, Colorado: Part 1 - Heave features and physical geological framework","interactions":[],"lastModifiedDate":"2012-03-12T17:21:11","indexId":"70031663","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1574,"text":"Environmental & Engineering Geoscience","printIssn":"1078-7275","active":true,"publicationSubtype":{"id":10}},"title":"Steeply dipping heaving bedrock, Colorado: Part 1 - Heave features and physical geological framework","docAbstract":"Differentially heaving bedrock has caused severe damage near the Denver metropolitan area. This paper describes heave-feature morphologies, the underlying bedrock framework, and their inter-relationship. The heave features are linear to curvilinear and may attain heights of 0.7 m (2.4 ft), widths of 58 m (190 ft), and lengths of 1,067 m (3,500 ft). They are nearly symmetrical to highly asymmetrical in cross section, with width-to-height ratios of 45:1 to 400:1, and most are oriented parallel with the mountain front. The bedrock consists of Mesozoic sedimentary formations having dip angles of 30 degrees to vertical to overturned. Mixed claystone-siltstone bedding sequences up to 36-m (118-ft) thick are common in the heave-prone areas, and interbeds of bentonite, limestone, or sandstone may be present. Highly fractured zones of weathered to variably weathered claystone extend to depths of 19.5 to 22.3 m (64 to 73 ft). Fracture spacings are 0.1 to 0.2 m (0.3 to 0.7 ft) in the weathered and variably weathered bedrock and up to 0.75 m (2.5 ft) in the underlying, unweathered bedrock. Curvilinear shear planes in the weathered claystone show thrust or reverse offsets up to 1.2 m (3.9 ft). Three associations between heave-feature morphologies and the geological framework are recognized: (1) Linear, symmetrical to asymmetrical heaves are associated with primary bedding composition changes. (2) Linear, highly asymmetrical heaves are associated with shear planes along bedding. (3) Curvi-linear, highly asymmetrical heaves are associated with bedding-oblique shear planes.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental and Engineering Geoscience","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2113/gseegeosci.13.4.289","issn":"10787275","usgsCitation":"Noe, D., Higgins, J., and Olsen, H.W., 2007, Steeply dipping heaving bedrock, Colorado: Part 1 - Heave features and physical geological framework: Environmental & Engineering Geoscience, v. 13, no. 4, p. 289-308, https://doi.org/10.2113/gseegeosci.13.4.289.","startPage":"289","endPage":"308","numberOfPages":"20","costCenters":[],"links":[{"id":240044,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212544,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/gseegeosci.13.4.289"}],"volume":"13","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9827e4b08c986b31be6d","contributors":{"authors":[{"text":"Noe, D.C.","contributorId":95215,"corporation":false,"usgs":true,"family":"Noe","given":"D.C.","email":"","affiliations":[],"preferred":false,"id":432575,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Higgins, J.D.","contributorId":37154,"corporation":false,"usgs":true,"family":"Higgins","given":"J.D.","email":"","affiliations":[],"preferred":false,"id":432574,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Olsen, H. W.","contributorId":10060,"corporation":false,"usgs":true,"family":"Olsen","given":"H.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":432573,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031662,"text":"70031662 - 2007 - Space use by Black-necked Stilts Himantopus mexicanus in the San Francisco Bay estuary","interactions":[],"lastModifiedDate":"2017-08-26T13:57:46","indexId":"70031662","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":900,"text":"Ardea","active":true,"publicationSubtype":{"id":10}},"title":"Space use by Black-necked Stilts Himantopus mexicanus in the San Francisco Bay estuary","docAbstract":"We examined space use by Black-necked Stilts Himantopus mexicanus in the San Francisco Bay estuary, USA, to better understand how shorebirds use their Pacific Flyway landscape. These efforts are particularly important in the San Francisco Bay estuary where ongoing large-scale restoration projects are rapidly changing the mosaic of wetland habitats. We radio-marked 59 stilts and tracked individuals for up to four months and found no difference in home range size by sex or between North and South Bay subregions. We did find differences in home range size by capture site. Mean home range was 283.5 ha and movement from capture sites was 4.5 km. We used cluster analysis to calculate number of focal areas for individuals and found that overall space requirements were larger for stilts with multiple centres of activity. Birds with multiple use areas were often those that bred in vegetated marshes and moved into salt ponds when their nests failed or after chicks hatched. In the South Bay subregion, salt pond use was greater than availability in core use home range areas despite comprising the largest proportion of available habitat. Tidal salt marsh restoration from former salt ponds may reduce available habitat of invertebrate prey species that depend on hypersaline habitats; retention of some shallow, mid-salinity managed ponds may mitigate this loss. A better understanding of the space use and habitat requirements of stilts will provide for more specific habitat and management recommendations in areas targeted for wetland restoration, contributing to better conservation of shorebird populations along the Pacific Flyway.","language":"English","publisher":"Netherlands Ornithologists' Union","doi":"10.5253/078.095.0210","issn":"03732266","usgsCitation":"Hickey, C., Warnock, N., Takekawa, J.Y., and Athearn, N., 2007, Space use by Black-necked Stilts Himantopus mexicanus in the San Francisco Bay estuary: Ardea, v. 95, no. 2, p. 275-288, https://doi.org/10.5253/078.095.0210.","productDescription":"14 p.","startPage":"275","endPage":"288","costCenters":[],"links":[{"id":477019,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.5253/078.095.0210","text":"Publisher Index Page"},{"id":240006,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"95","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9407e4b08c986b31a80b","contributors":{"authors":[{"text":"Hickey, C.","contributorId":98116,"corporation":false,"usgs":true,"family":"Hickey","given":"C.","email":"","affiliations":[],"preferred":false,"id":432572,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Warnock, N.","contributorId":80615,"corporation":false,"usgs":true,"family":"Warnock","given":"N.","email":"","affiliations":[],"preferred":false,"id":432570,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Takekawa, John Y. 0000-0003-0217-5907 john_takekawa@usgs.gov","orcid":"https://orcid.org/0000-0003-0217-5907","contributorId":176168,"corporation":false,"usgs":true,"family":"Takekawa","given":"John","email":"john_takekawa@usgs.gov","middleInitial":"Y.","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":false,"id":432569,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Athearn, N.D.","contributorId":86958,"corporation":false,"usgs":true,"family":"Athearn","given":"N.D.","affiliations":[],"preferred":false,"id":432571,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031660,"text":"70031660 - 2007 - Seasonal variation in nutrient retention during inundation of a short-hydroperiod floodplain","interactions":[],"lastModifiedDate":"2012-03-12T17:21:11","indexId":"70031660","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3301,"text":"River Research and Applications","active":true,"publicationSubtype":{"id":10}},"title":"Seasonal variation in nutrient retention during inundation of a short-hydroperiod floodplain","docAbstract":"Floodplains are generally considered to be important locations for nutrient retention or inorganic-to-organic nutrient conversions in riverine ecosystems. However, little is known about nutrient processing in short-hydroperiod floodplains or seasonal variation in floodplain nutrient retention. Therefore, we quantified the net uptake, release or transformation of nitrogen (N), phosphorus (P) and suspended sediment species during brief periods (1-2 days) of overbank flooding through a 250-m floodplain flowpath on the fourth-order Mattawoman Creek, Maryland U.S.A. Sampling occurred during a winter, two spring and a summer flood in this largely forested watershed with low nutrient and sediment loading. Concentrations of NO3- increased significantly in surface water flowing over the floodplain in three of the four floods, suggesting the floodplain was a source of NO3-. The upper portion of the floodplain flowpath consistently exported NH4+, most likely due to the hyporheic: flushing of floodplain soil NH4+, which was then likely nitrified to NO3- in floodwaters. The floodplain was a sink for particulate organic P (POP) during two floods and particulate organic N and inorganic suspended sediment (ISS) during one flood. Large releases of all dissolved inorganic N and P species occurred following a snowmelt and subsequent cold winter flood. Although there was little consistency in most patterns of nutrient processing among the different floods, this floodplain, characterized by brief inundation, low residence time and low nutrient loading, behaved oppositely from the conceptual model for most floodplains in that it generally exported inorganic nutrients and imported organic nutrients.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"River Research and Applications","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/rra.1035","issn":"15351459","usgsCitation":"Noe, G., and Hupp, C., 2007, Seasonal variation in nutrient retention during inundation of a short-hydroperiod floodplain: River Research and Applications, v. 23, no. 10, p. 1088-1101, https://doi.org/10.1002/rra.1035.","startPage":"1088","endPage":"1101","numberOfPages":"14","costCenters":[],"links":[{"id":212483,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/rra.1035"},{"id":239974,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"10","noUsgsAuthors":false,"publicationDate":"2007-07-27","publicationStatus":"PW","scienceBaseUri":"505b88e9e4b08c986b316c27","contributors":{"authors":[{"text":"Noe, G.B.","contributorId":66464,"corporation":false,"usgs":true,"family":"Noe","given":"G.B.","email":"","affiliations":[],"preferred":false,"id":432563,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hupp, C.R. 0000-0003-1853-9197","orcid":"https://orcid.org/0000-0003-1853-9197","contributorId":78775,"corporation":false,"usgs":true,"family":"Hupp","given":"C.R.","affiliations":[],"preferred":false,"id":432564,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
]}