{"pageNumber":"880","pageRowStart":"21975","pageSize":"25","recordCount":46733,"records":[{"id":70031636,"text":"70031636 - 2007 - Mercury concentrations and space use of pre-breeding American avocets and black-necked stilts in San Francisco Bay","interactions":[],"lastModifiedDate":"2017-07-19T15:28:27","indexId":"70031636","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3352,"text":"Science of the Total Environment","active":true,"publicationSubtype":{"id":10}},"title":"Mercury concentrations and space use of pre-breeding American avocets and black-necked stilts in San Francisco Bay","docAbstract":"<p><span>We examined factors influencing mercury concentrations in pre-breeding American avocets (</span><i>Recurvirostra americana</i><span>) and black-necked stilts (</span><i>Himantopus mexicanus</i><span>), the two most abundant breeding shorebirds in San Francisco Bay, California. We tested the effects of species, site, sex, year, and date on total mercury concentrations in blood of pre-breeding adult birds and used radio telemetry to determine space use and sites of dietary mercury exposure. We collected blood from 373 avocets and 157 stilts from February to April in 2005 and 2006, radio-marked and tracked 115 avocets and 94 stilts, and obtained 2393 avocet and 1928 stilt telemetry locations. Capture site was the most important factor influencing mercury concentrations in birds, followed by species and sex. Mercury concentrations were higher in stilts (geometric mean: 1.09&nbsp;μg g</span><sup>−&nbsp;1</sup><span> wet weight [ww]) than in avocets (0.25&nbsp;μg g</span><sup>−&nbsp;1</sup><span> ww) and males (stilts: 1.32&nbsp;μg g</span><sup>−&nbsp;1</sup><span> ww; avocets: 0.32&nbsp;μg g</span><sup>−&nbsp;1</sup><span> ww) had higher levels than females (stilts: 1.15&nbsp;μg g</span><sup>−&nbsp;1</sup><span> ww; avocets: 0.21&nbsp;μg g</span><sup>−&nbsp;1</sup><span> ww). Mercury concentrations were highest for both species at the southern end of San Francisco Bay, especially in salt pond A8 (stilts: 3.31&nbsp;μg g</span><sup>−&nbsp;1</sup><span> ww; avocets: 0.58&nbsp;μg g</span><sup>−&nbsp;1</sup><span> ww). Radio telemetry data showed that birds had strong fidelity to their capture site. Avocets primarily used salt ponds, tidal marshes, tidal flats, and managed marshes, whereas stilts mainly used salt ponds, managed marshes, and tidal marshes. Our results suggest that variation in blood mercury concentrations among sites was attributed to differences in foraging areas, and species differences in habitat use and foraging strategies may increase mercury exposure in stilts more than avocets.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.scitotenv.2007.04.027","issn":"00489697","usgsCitation":"Ackerman, J., Eagles-Smith, C.A., Takekawa, J.Y., Demers, S.A., Adelsbach, T.L., Bluso, J., Miles, A.K., Warnock, N., Suchanek, T., and Schwarzbach, S.E., 2007, Mercury concentrations and space use of pre-breeding American avocets and black-necked stilts in San Francisco Bay: Science of the Total Environment, v. 384, no. 1-3, p. 452-466, https://doi.org/10.1016/j.scitotenv.2007.04.027.","productDescription":"15 p.","startPage":"452","endPage":"466","numberOfPages":"15","costCenters":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"links":[{"id":212185,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.scitotenv.2007.04.027"},{"id":239635,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"384","issue":"1-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a53ede4b0c8380cd6ce00","contributors":{"authors":[{"text":"Ackerman, Joshua T. 0000-0002-3074-8322 jackerman@usgs.gov","orcid":"https://orcid.org/0000-0002-3074-8322","contributorId":147078,"corporation":false,"usgs":true,"family":"Ackerman","given":"Joshua T.","email":"jackerman@usgs.gov","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":false,"id":432454,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Eagles-Smith, Collin A. 0000-0003-1329-5285 ceagles-smith@usgs.gov","orcid":"https://orcid.org/0000-0003-1329-5285","contributorId":505,"corporation":false,"usgs":true,"family":"Eagles-Smith","given":"Collin","email":"ceagles-smith@usgs.gov","middleInitial":"A.","affiliations":[{"id":518,"text":"Oregon Water Science Center","active":true,"usgs":true},{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true},{"id":289,"text":"Forest and Rangeland Ecosys Science Center","active":true,"usgs":true}],"preferred":true,"id":432456,"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":432452,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Demers, Scott A.","contributorId":62411,"corporation":false,"usgs":true,"family":"Demers","given":"Scott","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":432451,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Adelsbach, Terrence L.","contributorId":60745,"corporation":false,"usgs":true,"family":"Adelsbach","given":"Terrence","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":432455,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Bluso, J.D.","contributorId":17033,"corporation":false,"usgs":true,"family":"Bluso","given":"J.D.","email":"","affiliations":[],"preferred":false,"id":432447,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Miles, A. Keith 0000-0002-3108-808X keith_miles@usgs.gov","orcid":"https://orcid.org/0000-0002-3108-808X","contributorId":196,"corporation":false,"usgs":true,"family":"Miles","given":"A.","email":"keith_miles@usgs.gov","middleInitial":"Keith","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":432449,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Warnock, Nils","contributorId":64534,"corporation":false,"usgs":false,"family":"Warnock","given":"Nils","email":"","affiliations":[],"preferred":false,"id":432453,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Suchanek, Thomas H. tsuchanek@usgs.gov","contributorId":2800,"corporation":false,"usgs":true,"family":"Suchanek","given":"Thomas H.","email":"tsuchanek@usgs.gov","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":false,"id":432448,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Schwarzbach, Steven E. steven_schwarzbach@usgs.gov","contributorId":1025,"corporation":false,"usgs":true,"family":"Schwarzbach","given":"Steven","email":"steven_schwarzbach@usgs.gov","middleInitial":"E.","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":432450,"contributorType":{"id":1,"text":"Authors"},"rank":10}]}}
,{"id":70031638,"text":"70031638 - 2007 - Cultural diversity, economic development and societal instability","interactions":[],"lastModifiedDate":"2012-03-12T17:21:13","indexId":"70031638","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2980,"text":"PLoS ONE","active":true,"publicationSubtype":{"id":10}},"title":"Cultural diversity, economic development and societal instability","docAbstract":"Background. Social scientists have suggested that cultural diversity in a nation leads to societal instability. However, societal instability may be affected not only by within-nation on ?? diversity, but also diversity between a nation and its neighbours or ?? diversity. It is also necessary to distinguish different domains of diversity, namely linguistic, ethnic and religious, and to distinguish between the direct effects of diversity on societal instability, and effects that are mediated by economic conditions. Methodology/Principal Findings. We assembled a large cross-national dataset with information on ?? and ?? cultural diversity, economic conditions, and indices of societal instability. Structural equation modeling was used to evaluate the direct and indirect effects of cultural diversity on economics and societal stability. Results show that different type and domains of diversity have interacting effects. As previously documented, linguistic ?? diversity has a negative effect on economic performance, and we show that it is largely through this economic mechanism that it affects societal instability. For ?? diversity, the higher the linguistic diversity among nations in a region, the less stable the nation. But, religious ?? diversity has the opposite effect, reducing instability, particularly in the presence of high linguistic diversity. Conclusions. Within-nation linguistic diversity is associated with reduced economic performance, which, in turn, increases societal instability. Nations which differ linguistically from their neighbors are also less stable. However, religious diversity between, neighboring nations has the opposite effect, decreasing societal instability.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"PLoS ONE","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1371/journal.pone.0000929","issn":"19326203","usgsCitation":"Nettle, D., Grace, J., Choisy, M., Cornell, H., Guegan, J., and Hochberg, M., 2007, Cultural diversity, economic development and societal instability: PLoS ONE, v. 2, no. 9, https://doi.org/10.1371/journal.pone.0000929.","costCenters":[],"links":[{"id":477234,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1371/journal.pone.0000929","text":"Publisher Index Page"},{"id":239669,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212216,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1371/journal.pone.0000929"}],"volume":"2","issue":"9","noUsgsAuthors":false,"publicationDate":"2007-09-26","publicationStatus":"PW","scienceBaseUri":"5059fd05e4b0c8380cd4e5bd","contributors":{"authors":[{"text":"Nettle, D.","contributorId":13812,"corporation":false,"usgs":true,"family":"Nettle","given":"D.","email":"","affiliations":[],"preferred":false,"id":432459,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Grace, J.B. 0000-0001-6374-4726","orcid":"https://orcid.org/0000-0001-6374-4726","contributorId":38938,"corporation":false,"usgs":true,"family":"Grace","given":"J.B.","affiliations":[],"preferred":false,"id":432460,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Choisy, M.","contributorId":70600,"corporation":false,"usgs":true,"family":"Choisy","given":"M.","affiliations":[],"preferred":false,"id":432462,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cornell, H.V.","contributorId":42039,"corporation":false,"usgs":true,"family":"Cornell","given":"H.V.","email":"","affiliations":[],"preferred":false,"id":432461,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Guegan, J.-F.","contributorId":73008,"corporation":false,"usgs":true,"family":"Guegan","given":"J.-F.","email":"","affiliations":[],"preferred":false,"id":432463,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Hochberg, M.E.","contributorId":83738,"corporation":false,"usgs":true,"family":"Hochberg","given":"M.E.","email":"","affiliations":[],"preferred":false,"id":432464,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031652,"text":"70031652 - 2007 - Geologic characterization of shelf areas using usSEABED for GIS mapping, modeling processes and assessing marine sand and gravel resources","interactions":[],"lastModifiedDate":"2017-09-20T15:48:21","indexId":"70031652","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Geologic characterization of shelf areas using usSEABED for GIS mapping, modeling processes and assessing marine sand and gravel resources","docAbstract":"Geologic maps depicting offshore sedimentary features serve many scientific and applied purposes. Such maps have been lacking, but recent computer technology and software offer promise in the capture and display of diverse marine data. Continental margins contain landforms which provide a variety of important functions and contain important sedimentary records. Some shelf areas also contain deposits regarded as potential aggregate resources. Because proper management of coastal and offshore areas is increasingly important, knowledge of the framework geology and marine processes is critical. Especially valuable are comprehensive and integrated digital databases based on high-quality information from original sources. Products of interest are GIS maps containing thematic information, such as sediment character and texture. These products are useful to scientists modeling nearshore and shelf processes as well as planners and managers. The U.S. Geological Survey is leading a national program to gather a variety of extant marine geologic data into the usSEABED database system. This provides centralized, integrated marine geologic data collected over the past 50 years. To date, over 340,000 sediment data points from the U.S. reside in usSEABED, which combines an array of physical data and analytical and descriptive information about the sea floor and are available to the marine community through three USGS data reports for the Atlantic, Gulf of Mexico, and Pacific published in 2006, and the project web sites: (http://woodshole.er.usg s.gov/project-pages/aggregates/ and http://walrus.wr.usgs.gov/usseabed/)","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes","conferenceDate":"May 13-17, 2007","conferenceLocation":"New Orleans, LA","language":"English","publisher":"American Society of Civil Engineers","doi":"10.1061/40926(239)194","isbn":"0784409269; 9780784409268","usgsCitation":"Williams, S., Bliss, J.D., Arsenault, M., Jenkins, C., and Goff, J., 2007, Geologic characterization of shelf areas using usSEABED for GIS mapping, modeling processes and assessing marine sand and gravel resources, <i>in</i> Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes, New Orleans, LA, May 13-17, 2007, p. 2473-2486, https://doi.org/10.1061/40926(239)194.","productDescription":"14 p.","startPage":"2473","endPage":"2486","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true},{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":239870,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","noUsgsAuthors":false,"publicationDate":"2012-04-26","publicationStatus":"PW","scienceBaseUri":"505a1937e4b0c8380cd558f0","contributors":{"authors":[{"text":"Williams, S.J.","contributorId":85203,"corporation":false,"usgs":true,"family":"Williams","given":"S.J.","email":"","affiliations":[],"preferred":false,"id":432521,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bliss, J. D.","contributorId":25564,"corporation":false,"usgs":true,"family":"Bliss","given":"J.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":432518,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Arsenault, M.A.","contributorId":32353,"corporation":false,"usgs":true,"family":"Arsenault","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":432519,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jenkins, C.J.","contributorId":61244,"corporation":false,"usgs":true,"family":"Jenkins","given":"C.J.","email":"","affiliations":[],"preferred":false,"id":432520,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Goff, J.A.","contributorId":17004,"corporation":false,"usgs":true,"family":"Goff","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":432517,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031670,"text":"70031670 - 2007 - Rapid estimation of recharge potential in ephemeral-stream channels using electromagnetic methods, and measurements of channel and vegetation characteristics","interactions":[],"lastModifiedDate":"2017-12-27T12:27:10","indexId":"70031670","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Rapid estimation of recharge potential in ephemeral-stream channels using electromagnetic methods, and measurements of channel and vegetation characteristics","docAbstract":"To classify recharge potential (RCP) in ephemeral-stream channels, a method was developed that incorporates information about channel geometry, vegetation characteristics, and bed-sediment apparent electrical conductivity (??a). Recharge potential is not independently measurable, but is instead formulated as a site-specific, qualitative parameter. We used data from 259 transects across two ephemeral-stream channels near Sierra Vista, Arizona, a location with a semiarid climate. Seven data types were collected: ??a averaged over two depth intervals (0-3 m, and 0-6 m), channel incision depth and width, diameter-at-breast-height of the largest tree, woody-plant and grass density. A two-tiered system was used to classify a transect's RCP. In the first tier, transects were categorized by estimates of near-surface-sediment hydraulic permeability as low, moderate, or high using measurements of 0-3 m-depth ??a. Each of these categories was subdivided into low, medium, or high RCP classes using the remaining six data types, thus yielding a total of nine RCP designations. Six sites in the study area were used to compare RCP and ??a with previously measured surrogates for hydraulic permeability. Borehole-averaged percent fines showed a moderate correlation with both shallow and deep ??a measurements, however, correlation of point measurements of saturated hydraulic conductivity, percent fines, and cylinder infiltrometer measurements with ??a and RCP was generally poor. The poor correlation was probably caused by the relatively large measurement volume and spatial averaging of ??a compared with the spatially-limited point measurements. Because of the comparatively large spatial extent of measurement transects and variety of data types collected, RCP estimates can give a more complete picture of the major factors affecting recharge at a site than is possible through point or borehole-averaged estimates of hydraulic permeability alone. ?? 2007 Elsevier B.V. All rights reserved.","language":"English","publisher":"Elsevier","doi":"10.1016/j.jhydrol.2007.06.028","usgsCitation":"Callegary, J., Leenhouts, J., Paretti, N., and Jones, C.A., 2007, Rapid estimation of recharge potential in ephemeral-stream channels using electromagnetic methods, and measurements of channel and vegetation characteristics: Journal of Hydrology, v. 344, no. 1-2, p. 17-31, https://doi.org/10.1016/j.jhydrol.2007.06.028.","productDescription":"15 p.","startPage":"17","endPage":"31","costCenters":[],"links":[{"id":240152,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"344","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a94dbe4b0c8380cd8166a","contributors":{"authors":[{"text":"Callegary, J.B.","contributorId":71769,"corporation":false,"usgs":true,"family":"Callegary","given":"J.B.","affiliations":[],"preferred":false,"id":432599,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Leenhouts, J.M.","contributorId":103861,"corporation":false,"usgs":true,"family":"Leenhouts","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":432600,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Paretti, N.V.","contributorId":16226,"corporation":false,"usgs":true,"family":"Paretti","given":"N.V.","email":"","affiliations":[],"preferred":false,"id":432597,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jones, Christopher A. chrisj@usgs.gov","contributorId":47478,"corporation":false,"usgs":true,"family":"Jones","given":"Christopher","email":"chrisj@usgs.gov","middleInitial":"A.","affiliations":[{"id":35993,"text":"Hydrologic Investigations and Research Section","active":true,"usgs":true}],"preferred":false,"id":432598,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031672,"text":"70031672 - 2007 - A comparison of conventional capture versus PIT reader techniques for estimating survival and capture probabilities of big brown bats (Eptesicus fuscus)","interactions":[],"lastModifiedDate":"2012-03-12T17:21:13","indexId":"70031672","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":629,"text":"Acta Chiropterologica","active":true,"publicationSubtype":{"id":10}},"title":"A comparison of conventional capture versus PIT reader techniques for estimating survival and capture probabilities of big brown bats (Eptesicus fuscus)","docAbstract":"We compared conventional capture (primarily mist nets and harp traps) and passive integrated transponder (PIT) tagging techniques for estimating capture and survival probabilities of big brown bats (Eptesicus fuscus) roosting in buildings in Fort Collins, Colorado. A total of 987 female adult and juvenile bats were captured and marked by subdermal injection of PIT tags during the summers of 2001-2005 at five maternity colonies in buildings. Openings to roosts were equipped with PIT hoop-style readers, and exit and entry of bats were passively monitored on a daily basis throughout the summers of 2002-2005. PIT readers 'recaptured' adult and juvenile females more often than conventional capture events at each roost. Estimates of annual capture probabilities for all five colonies were on average twice as high when estimated from PIT reader data (P?? = 0.93-1.00) than when derived from conventional techniques (P?? = 0.26-0.66), and as a consequence annual survival estimates were more precisely estimated when using PIT reader encounters. Short-term, daily capture estimates were also higher using PIT readers than conventional captures. We discuss the advantages and limitations of using PIT tags and passive encounters with hoop readers vs. conventional capture techniques for estimating these vital parameters in big brown bats. ?? Museum and Institute of Zoology PAS.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Acta Chiropterologica","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.3161/1733-5329(2007)9[149:ACOCCV]2.0.CO;2","issn":"15081109","usgsCitation":"Ellison, L., O'Shea, T., Neubaum, D., Neubaum, M., Pearce, R., and Bowen, R.A., 2007, A comparison of conventional capture versus PIT reader techniques for estimating survival and capture probabilities of big brown bats (Eptesicus fuscus): Acta Chiropterologica, v. 9, no. 1, p. 149-160, https://doi.org/10.3161/1733-5329(2007)9[149:ACOCCV]2.0.CO;2.","startPage":"149","endPage":"160","numberOfPages":"12","costCenters":[],"links":[{"id":212188,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3161/1733-5329(2007)9[149:ACOCCV]2.0.CO;2"},{"id":239638,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"9","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e359e4b0c8380cd45fac","contributors":{"authors":[{"text":"Ellison, L.E.","contributorId":103610,"corporation":false,"usgs":true,"family":"Ellison","given":"L.E.","email":"","affiliations":[],"preferred":false,"id":432612,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"O'Shea, T. J. 0000-0002-0758-9730","orcid":"https://orcid.org/0000-0002-0758-9730","contributorId":50100,"corporation":false,"usgs":true,"family":"O'Shea","given":"T. J.","affiliations":[],"preferred":false,"id":432609,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Neubaum, D.J.","contributorId":43720,"corporation":false,"usgs":true,"family":"Neubaum","given":"D.J.","email":"","affiliations":[],"preferred":false,"id":432607,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Neubaum, M.A.","contributorId":50866,"corporation":false,"usgs":true,"family":"Neubaum","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":432610,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Pearce, R.D.","contributorId":45439,"corporation":false,"usgs":true,"family":"Pearce","given":"R.D.","email":"","affiliations":[],"preferred":false,"id":432608,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Bowen, R. A.","contributorId":80623,"corporation":false,"usgs":false,"family":"Bowen","given":"R.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":432611,"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":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":70031696,"text":"70031696 - 2007 - Petrology and tectonics of Phanerozoic continent formation: From island arcs to accretion and continental arc magmatism","interactions":[],"lastModifiedDate":"2023-07-12T11:22:01.220955","indexId":"70031696","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1427,"text":"Earth and Planetary Science Letters","active":true,"publicationSubtype":{"id":10}},"title":"Petrology and tectonics of Phanerozoic continent formation: From island arcs to accretion and continental arc magmatism","docAbstract":"<p>Mesozoic continental arcs in the North American Cordillera were examined here to establish a baseline model for Phanerozoic continent formation. We combine new trace-element data on lower crustal xenoliths from the Mesozoic Sierra Nevada Batholith with an extensive grid-based geochemical map of the Peninsular Ranges Batholith, the southern equivalent of the Sierras. Collectively, these observations give a three-dimensional view of the crust, which permits the petrogenesis and tectonics of Phanerozoic crust formation to be linked in space and time. Subduction of the Farallon plate beneath North America during the Triassic to early Cretaceous was characterized by trench retreat and slab rollback because old and cold oceanic lithosphere was being subducted. This generated an extensional subduction zone, which created fringing island arcs just off the Paleozoic continental margin. However, as the age of the Farallon plate at the time of subduction decreased, the extensional environment waned, allowing the fringing island arc to accrete onto the continental margin. With continued subduction, a continental arc was born and a progressively more compressional environment developed as the age of subducting slab continued to young. Refinement into a felsic crust occurred after accretion, that is, during the continental arc stage, wherein a thickened crustal and lithospheric column permitted a longer differentiation column. New basaltic arc magmas underplate and intrude the accreted terrane, suture, and former continental margin. Interaction of these basaltic magmas with pre-existing crust and lithospheric mantle created garnet pyroxenitic mafic cumulates by fractional crystallization at depth as well as gabbroic and garnet pyroxenitic restites at shallower levels by melting of pre-existing lower crust. The complementary felsic plutons formed by these deep-seated differentiation processes rose into the upper crust, stitching together the accreted terrane, suture and former continental margin. The mafic cumulates and restites, owing to their high densities, eventually foundered into the mantle, leaving behind a more felsic crust. Our grid-based sampling allows us to estimate an unbiased average upper crustal composition for the Peninsular Ranges Batholith. Major and trace-element compositions are very similar to global continental crust averaged over space and time, but in detail, the Peninsular Ranges are slightly lower in compatible to mildly incompatible elements, MgO, Mg#, V, Sc, Co, and Cr. The compositional similarities suggest a strong arc component in global continental crust, but the slight discrepancies suggest that additional crust formation processes are also important in continent formation as a whole. Finally, the delaminated Sierran garnet pyroxenites have some of the lowest U/Pb ratios ever measured for silicate rocks. Such material, if recycled and stored in the deep mantle, would generate a reservoir with very unradiogenic Pb, providing one solution to the global Pb isotope paradox.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.epsl.2007.09.025","issn":"0012821X","usgsCitation":"Lee, C., Morton, D.M., Kistler, R.W., and Baird, A.K., 2007, Petrology and tectonics of Phanerozoic continent formation: From island arcs to accretion and continental arc magmatism: Earth and Planetary Science Letters, v. 263, no. 3-4, p. 370-387, https://doi.org/10.1016/j.epsl.2007.09.025.","productDescription":"18 p.","startPage":"370","endPage":"387","numberOfPages":"18","costCenters":[],"links":[{"id":240007,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"263","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a782be4b0c8380cd7865b","contributors":{"authors":[{"text":"Lee, C.-T.A.","contributorId":20549,"corporation":false,"usgs":true,"family":"Lee","given":"C.-T.A.","email":"","affiliations":[],"preferred":false,"id":432729,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Morton, D. M.","contributorId":54608,"corporation":false,"usgs":true,"family":"Morton","given":"D.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":432731,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kistler, R. W.","contributorId":36112,"corporation":false,"usgs":true,"family":"Kistler","given":"R.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":432730,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Baird, A. K.","contributorId":65148,"corporation":false,"usgs":true,"family":"Baird","given":"A.","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":432732,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031710,"text":"70031710 - 2007 - Evidence of widespread natural reproduction by lake trout <i>Salvelinus namaycush</i> in the Michigan waters of Lake Huron","interactions":[],"lastModifiedDate":"2016-04-28T13:39:56","indexId":"70031710","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2330,"text":"Journal of Great Lakes Research","active":true,"publicationSubtype":{"id":10}},"title":"Evidence of widespread natural reproduction by lake trout <i>Salvelinus namaycush</i> in the Michigan waters of Lake Huron","docAbstract":"<p><span>Localized natural reproduction of lake trout&nbsp;</span><i>Salvelinus namaycush</i><span>&nbsp;in Lake Huron has occurred since the 1980s near Thunder Bay, Michigan. During 2004&ndash;2006, USGS spring and fall bottom trawl surveys captured 63 wild juvenile lake trout at depths ranging from 37&ndash;73 m at four of five ports in the Michigan waters of the main basin of Lake Huron, more than five times the total number captured in the previous 30-year history of the surveys. Relatively high catches of wild juvenile lake trout in bottom trawls during 2004&ndash;2006 suggest that natural reproduction by lake trout has increased and occurred throughout the Michigan waters of the main basin. Increased catches of wild juvenile lake trout in the USGS fall bottom trawl survey were coincident with a drastic decline in alewife abundance, but data were insufficient to determine what mechanism may be responsible for increased natural reproduction by lake trout. We recommend further monitoring of juvenile lake trout abundance and research into early life history of lake trout in Lake Huron.</span></p>","language":"English","publisher":"International Association for Great Lakes Research","doi":"10.3394/0380-1330(2007)33[917:EOWNRB]2.0.CO;2","issn":"03801330","usgsCitation":"Riley, S., He, J., Johnson, J., O’Brien, T.P., and Schaeffer, J., 2007, Evidence of widespread natural reproduction by lake trout <i>Salvelinus namaycush</i> in the Michigan waters of Lake Huron: Journal of Great Lakes Research, v. 33, no. 4, p. 917-921, https://doi.org/10.3394/0380-1330(2007)33[917:EOWNRB]2.0.CO;2.","productDescription":"5 p.","startPage":"917","endPage":"921","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":239710,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212250,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3394/0380-1330(2007)33[917:EOWNRB]2.0.CO;2"}],"volume":"33","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0d70e4b0c8380cd53007","contributors":{"authors":[{"text":"Riley, S.C.","contributorId":71378,"corporation":false,"usgs":true,"family":"Riley","given":"S.C.","email":"","affiliations":[],"preferred":false,"id":432792,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"He, J.X.","contributorId":7901,"corporation":false,"usgs":true,"family":"He","given":"J.X.","email":"","affiliations":[],"preferred":false,"id":432788,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Johnson, J.E.","contributorId":44857,"corporation":false,"usgs":true,"family":"Johnson","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":432791,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"O’Brien, T. P.","contributorId":22146,"corporation":false,"usgs":true,"family":"O’Brien","given":"T.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":432789,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Schaeffer, J.S.","contributorId":42688,"corporation":false,"usgs":true,"family":"Schaeffer","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":432790,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031733,"text":"70031733 - 2007 - Toward a transport-based analysis of nutrient spiraling and uptake in streams","interactions":[],"lastModifiedDate":"2023-12-07T16:44:26.266653","indexId":"70031733","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2622,"text":"Limnology and Oceanography: Methods","active":true,"publicationSubtype":{"id":10}},"title":"Toward a transport-based analysis of nutrient spiraling and uptake in streams","docAbstract":"<p><span>Nutrient addition experiments are designed to study the cycling of nutrients in stream ecosystems where hydrologic and nonhydrologic processes determine nutrient fate. Because of the importance of hydrologic processes in stream ecosystems, a conceptual model known as nutrient spiraling is frequently employed. A central part of the nutrient spiraling approach is the determination of uptake length (</span><i>S</i><sub><i>w</i></sub><span>), the average distance traveled by dissolved nutrients in the water column before uptake. Although the nutrient spiraling concept has been an invaluable tool in stream ecology, the current practice of estimating uptake length from steady‐state nutrient data using linear regression (called here the “</span><i>S</i><sub><i>w</i></sub><span>&nbsp;approach”) presents a number of limitations. These limitations are identified by comparing the exponential&nbsp;</span><i>S</i><sub><i>w</i></sub><span>&nbsp;equation with analytical solutions of a stream solute transport model. This comparison indicates that (1)&nbsp;</span><i>S</i><sub><i>w</i></sub><span>&nbsp;is an aggregate measure of uptake that does not distinguish between main channel and storage zone processes, (2)&nbsp;</span><i>S</i><sub><i>w</i></sub><span>&nbsp;is an integrated measure of numerous hydrologic and nonhydrologic processes—this process integration may lead to difficulties in interpretation when comparing estimates of&nbsp;</span><i>S</i><sub><i>w</i></sub><span>, and (3) estimates of uptake velocity and areal uptake rate (</span><i>v</i><sub><i>f</i></sub><span>&nbsp;and&nbsp;</span><i>U</i><span>) based on&nbsp;</span><i>S</i><sub><i>w</i></sub><span>&nbsp;are not independent of system hydrology. Given these findings, a transport‐based approach to nutrient spiraling is presented for steady‐state and time‐series data sets. The transport‐based approach for time‐series data sets is suggested for future research on nutrient uptake as it provides a number of benefits, including the ability to (1) separately quantify main channel and storage zone uptake, (2) quantify specific hydrologic and nonhydrologic processes using various model parameters (process separation), (3) estimate uptake velocities and areal uptake rates that are independent of hydrologic effects, and (4) use shortterm, non‐plateau nutrient additions such that the effects of regeneration and mineralization are minimized. In summary, the transport‐based, time‐series approach provides a means of estimating traditional measures of nutrient uptake (</span><i>S</i><sub><i>w</i></sub><span>,&nbsp;</span><i>v</i><sub><i>f</i></sub><span>&nbsp;,&nbsp;</span><i>U</i><span>) while providing additional information on the location and magnitude of uptake (main channel versus storage zone). Application of the transport‐based approach to time‐series data from Green Creek, Antarctica, indicates that the bulk of nitrate uptake (~74% to 100%) occurred within the main channel where benthic uptake by algal mats is a likely process. Substantial uptake (~26%) also occurred in the storage zone of one reach, where uptake is attributed to the microbial community.</span></p>","language":"English","publisher":"ASLO","doi":"10.4319/lom.2007.5.50","usgsCitation":"Runkel, R.L., 2007, Toward a transport-based analysis of nutrient spiraling and uptake in streams: Limnology and Oceanography: Methods, v. 5, no. 1, p. 50-62, https://doi.org/10.4319/lom.2007.5.50.","productDescription":"13 p.","startPage":"50","endPage":"62","numberOfPages":"13","costCenters":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240083,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"5","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-01-22","publicationStatus":"PW","scienceBaseUri":"505bb5b2e4b08c986b326834","contributors":{"authors":[{"text":"Runkel, Robert L. 0000-0003-3220-481X runkel@usgs.gov","orcid":"https://orcid.org/0000-0003-3220-481X","contributorId":685,"corporation":false,"usgs":true,"family":"Runkel","given":"Robert","email":"runkel@usgs.gov","middleInitial":"L.","affiliations":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true}],"preferred":true,"id":432902,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70031738,"text":"70031738 - 2007 - Morphological variation of siscowet lake trout in Lake Superior","interactions":[],"lastModifiedDate":"2016-04-29T10:43:51","indexId":"70031738","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":"Morphological variation of siscowet lake trout in Lake Superior","docAbstract":"<p><span>Historically, Lake Superior has contained many morphologically distinct forms of the lake trout&nbsp;</span><i>Salvelinus namaycush</i><span>&nbsp;that have occupied specific depths and locations and spawned at specific times of the year. Today, as was probably the case historically, the siscowet morphotype is the most abundant. Recent interest in harvesting siscowets to extract oil containing omega-3 fatty acids will require additional knowledge of the biology and stock structure of these lightly exploited populations. The objective of this study was to determine whether shape differences exist among siscowet populations across Lake Superior and whether these shape differences can be used to infer stock structure. Morphometric analysis (truss protocol) was used to differentiate among siscowets sampled from 23 locations in Lake Superior. We analyzed 31 distance measurements among 14 anatomical landmarks taken from digital images of fish recorded in the field. Cluster analysis of size-corrected data separated fish into three geographic groups: The Isle Royale, eastern (Michigan), and western regions (Michigan). Finer scales of stock structure were also suggested. Discriminant function analysis demonstrated that head measurements contributed to most of the observed variation. Cross-validation classification rates indicated that 67&ndash;71% of individual fish were correctly classified to their region of capture. This is the first study to present shape differences associated with location within a lake trout morphotype in Lake Superior.</span></p>","language":"English","publisher":"Taylor & Francis","doi":"10.1577/T06-098.1","issn":"00028487","usgsCitation":"Bronte, C., and Moore, S., 2007, Morphological variation of siscowet lake trout in Lake Superior: Transactions of the American Fisheries Society, v. 136, no. 2, p. 509-517, https://doi.org/10.1577/T06-098.1.","productDescription":"9 p.","startPage":"509","endPage":"517","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":240155,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212639,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/T06-098.1"}],"volume":"136","issue":"2","noUsgsAuthors":false,"publicationDate":"2011-01-09","publicationStatus":"PW","scienceBaseUri":"505a5e46e4b0c8380cd70909","contributors":{"authors":[{"text":"Bronte, C.R.","contributorId":20100,"corporation":false,"usgs":true,"family":"Bronte","given":"C.R.","email":"","affiliations":[],"preferred":false,"id":432919,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Moore, S.A.","contributorId":103397,"corporation":false,"usgs":true,"family":"Moore","given":"S.A.","email":"","affiliations":[],"preferred":false,"id":432920,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031739,"text":"70031739 - 2007 - Comparison of local- to regional-scale estimates of ground-water recharge in Minnesota, USA","interactions":[],"lastModifiedDate":"2023-10-03T11:20:41.383437","indexId":"70031739","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Comparison of local- to regional-scale estimates of ground-water recharge in Minnesota, USA","docAbstract":"<p><span>Regional ground-water recharge estimates for Minnesota were compared to estimates made on the basis of four local- and basin-scale methods. Three local-scale methods (unsaturated-zone water balance, water-table fluctuations (WTF) using three approaches, and age dating of ground water) yielded point estimates of recharge that represent spatial scales from about 1 to about 1000&nbsp;m</span><sup>2</sup><span>. A fourth method (RORA, a basin-scale analysis of streamflow records using a recession-curve-displacement technique) yielded recharge estimates at a scale of 10&ndash;1000s of km</span><sup>2</sup><span>. The RORA basin-scale recharge estimates were regionalized to estimate recharge for the entire State of Minnesota on the basis of a regional regression recharge (RRR) model that also incorporated soil and climate data. Recharge rates estimated by the RRR model compared favorably to the local and basin-scale recharge estimates. RRR estimates at study locations were about 41% less on average than the unsaturated-zone water-balance estimates, ranged from 44% greater to 12% less than estimates that were based on the three WTF approaches, were about 4% less than the age dating of ground-water estimates, and were about 5% greater than the RORA estimates. Of the methods used in this study, the WTF method is the simplest and easiest to apply. Recharge estimates made on the basis of the UZWB method were inconsistent with the results from the other methods. Recharge estimates using the RRR model could be a good source of input for regional ground-water flow models; RRR model results currently are being applied for this purpose in USGS studies elsewhere.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.jhydrol.2006.10.010","issn":"00221694","usgsCitation":"Delin, G., Healy, R.W., Lorenz, D., and Nimmo, J., 2007, Comparison of local- to regional-scale estimates of ground-water recharge in Minnesota, USA: Journal of Hydrology, v. 334, no. 1-2, p. 231-249, https://doi.org/10.1016/j.jhydrol.2006.10.010.","productDescription":"19 p.","startPage":"231","endPage":"249","numberOfPages":"19","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":392,"text":"Minnesota Water Science Center","active":true,"usgs":true}],"links":[{"id":239641,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United 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,{"id":70031740,"text":"70031740 - 2007 - Ensuring confidence in radionuclide-based sediment chronologies and bioturbation rates","interactions":[],"lastModifiedDate":"2017-08-29T14:01:16","indexId":"70031740","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1587,"text":"Estuarine, Coastal and Shelf Science","active":true,"publicationSubtype":{"id":10}},"title":"Ensuring confidence in radionuclide-based sediment chronologies and bioturbation rates","docAbstract":"<p>Sedimentary records of naturally occurring and fallout-derived radionuclides are widely used as tools for estimating both the ages of recent sediments and rates of sedimentation and bioturbation. Developing these records to the point of data interpretation requires careful sample collection, processing, analysis and data modeling. In this work, we document a number of potential pitfalls that can impact sediment core records and their interpretation. This paper is not intended as an exhaustive treatment of these potential problems. Rather, the emphasis is on potential problems that are not well documented in the literature, as follows: (1) the mere sampling of sediment cores at a resolution that is too coarse can result in an apparent diffusive mixing of the sedimentary record at rates comparable to diffusive bioturbation rates observed in many locations; (2) <sup>210</sup>Pb profiles in slowly accumulating sediments can easily be misinterpreted to be driven by sedimentation, when in fact bioturbation is the dominant control. Multiple isotopes of different half lives and/or origin may help to distinguish between these two possible interpretations; (3) apparent mixing can occur due simply to numerical artifacts inherent in the finite difference approximations of the advection diffusion equation used to model sedimentation and bioturbation. Model users need to be aware of this potential problem. Solutions to each of these potential pitfalls are offered to ensure the best possible sediment age estimates and/or sedimentation and bioturbation rates can be obtained.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.ecss.2006.09.006","issn":"02727714","usgsCitation":"Crusius, J., and Kenna, T.C., 2007, Ensuring confidence in radionuclide-based sediment chronologies and bioturbation rates: Estuarine, Coastal and Shelf Science, v. 71, no. 3-4, p. 537-544, https://doi.org/10.1016/j.ecss.2006.09.006.","productDescription":"8 p.","startPage":"537","endPage":"544","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true},{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":477154,"rank":1,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://hdl.handle.net/1912/1603","text":"External Repository"},{"id":239642,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"71","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a097ee4b0c8380cd51f43","contributors":{"authors":[{"text":"Crusius, John 0000-0003-2554-0831 jcrusius@usgs.gov","orcid":"https://orcid.org/0000-0003-2554-0831","contributorId":2155,"corporation":false,"usgs":true,"family":"Crusius","given":"John","email":"jcrusius@usgs.gov","affiliations":[{"id":119,"text":"Alaska Science Center Geology Minerals","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":432925,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kenna, Timothy C.","contributorId":36754,"corporation":false,"usgs":true,"family":"Kenna","given":"Timothy","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":432926,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031744,"text":"70031744 - 2007 - Ultraviolet radiation and bio-optics in Crater Lake, Oregon","interactions":[],"lastModifiedDate":"2017-11-15T09:57:03","indexId":"70031744","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":"Ultraviolet radiation and bio-optics in Crater Lake, Oregon","docAbstract":"Crater Lake, Oregon, is a mid-latitude caldera lake famous for its depth (594 m) and blue color. Recent underwater spectral measurements of solar radiation (300-800 nm) support earlier observations of unusual transparency and extend these to UV-B wavelengths. New data suggest that penetration of solar UVR into Crater Lake has a significant ecological impact. Evidence includes a correlation between water column chlorophyll-a and stratospheric ozone since 1984, the scarcity of organisms in the upper water column, and apparent UV screening pigments in phytoplankton that vary with depth. The lowest UV-B diffuse attenuation coefficients (K d,320) were similar to those reported for the clearest natural waters elsewhere, and were lower than estimates for pure water published in 1981. Optical proxies for UVR attenuation were correlated with chlorophyll-a concentration (0-30 m) during typical dry summer months from 1984 to 2002. Using all proxies and measurements of UV transparency, decadal and longer cycles were apparent but no long-term trend since the first optical measurement in 1896. ?? 2007 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrobiologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10750-006-0348-0","issn":"00188158","usgsCitation":"Hargreaves, B., Girdner, S., Buktenica, M., Collier, R., Urbach, E., and Larson, G., 2007, Ultraviolet radiation and bio-optics in Crater Lake, Oregon: Hydrobiologia, v. 574, no. 1, p. 107-140, https://doi.org/10.1007/s10750-006-0348-0.","startPage":"107","endPage":"140","numberOfPages":"34","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":239743,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212280,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10750-006-0348-0"}],"volume":"574","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bbc0de4b08c986b3289d4","contributors":{"authors":[{"text":"Hargreaves, B.R.","contributorId":71391,"corporation":false,"usgs":true,"family":"Hargreaves","given":"B.R.","email":"","affiliations":[],"preferred":false,"id":432939,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Girdner, S.F.","contributorId":71773,"corporation":false,"usgs":true,"family":"Girdner","given":"S.F.","affiliations":[],"preferred":false,"id":432940,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Buktenica, M.W.","contributorId":68263,"corporation":false,"usgs":true,"family":"Buktenica","given":"M.W.","affiliations":[],"preferred":false,"id":432938,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Collier, R.W.","contributorId":98547,"corporation":false,"usgs":true,"family":"Collier","given":"R.W.","email":"","affiliations":[],"preferred":false,"id":432942,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Urbach, E.","contributorId":78568,"corporation":false,"usgs":true,"family":"Urbach","given":"E.","email":"","affiliations":[],"preferred":false,"id":432941,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Larson, G.L.","contributorId":103021,"corporation":false,"usgs":true,"family":"Larson","given":"G.L.","email":"","affiliations":[],"preferred":false,"id":432943,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031745,"text":"70031745 - 2007 - Spatial and temporal migration patterns of Wilson's Warbler (<i>Wilsonia pusilla</i>) in the southwest as revealed by stable isotopes","interactions":[],"lastModifiedDate":"2017-11-25T13:54:37","indexId":"70031745","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3544,"text":"The Auk","onlineIssn":"1938-4254","printIssn":"0004-8038","active":true,"publicationSubtype":{"id":10}},"title":"Spatial and temporal migration patterns of Wilson's Warbler (<i>Wilsonia pusilla</i>) in the southwest as revealed by stable isotopes","docAbstract":"<p><span>We used stable hydrogen isotopes (δD) to identify the breeding locations of Wilson’s Warbler (</span><i>Wilsonia pusilla</i><span>) migrating through five sites spanning a cross-section of the species’ southwestern migration route during the springs of 2003 and 2004. Determining the temporal and spatial patterns of migration and degree of population segregation during migration is critical to understanding long-term population trends of migrant birds. At all five migration sites, we found a significant negative relationship between the date Wilson’s Warblers passed through the sampling station and δD values of their feathers. These data were consistent with a pattern of “leap-frog” migration, in which individuals that bred the previous season at southern latitudes migrated through migration stations earlier than individuals that had previously bred at more northern latitudes. We documented that this pattern was consistent across sites and in multiple years. This finding corroborates previous research conducted on Wilson’s Warbler during the fall migration. In addition, mean δD values became more negative across sampling stations from west to east, with the mean δD values at each station corresponding to different geographic regions of the Wilson’s Warblers’ western breeding range. These data indicate that Wilson’s Warblers passing through each station represented a specific regional subset of the entire Wilson’s Warbler western breeding range. As a result, habitat alterations at specific areas across the east-west expanse of the bird’s migratory route in the southwestern United States could differentially affect Wilson’s Warblers at different breeding areas. This migration information is critical for management of Neotropical migrants, especially in light of the rapid changes presently occurring over the southwestern landscape.</span></p>","language":"English","publisher":"American Ornithological Society","doi":"10.1642/0004-8038(2007)124[162:SATMPO]2.0.CO;2","issn":"00048038","usgsCitation":"Paxton, K., van Riper, C., Theimer, T., and Paxton, E.H., 2007, Spatial and temporal migration patterns of Wilson's Warbler (<i>Wilsonia pusilla</i>) in the southwest as revealed by stable isotopes: The Auk, v. 124, no. 1, p. 162-175, https://doi.org/10.1642/0004-8038(2007)124[162:SATMPO]2.0.CO;2.","productDescription":"14 p.","startPage":"162","endPage":"175","costCenters":[],"links":[{"id":477143,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1642/0004-8038(2007)124[162:satmpo]2.0.co;2","text":"Publisher Index Page"},{"id":239775,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"124","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b943ce4b08c986b31a95a","contributors":{"authors":[{"text":"Paxton, K.L.","contributorId":78547,"corporation":false,"usgs":true,"family":"Paxton","given":"K.L.","email":"","affiliations":[],"preferred":false,"id":432947,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"van Riper, Charles III 0000-0003-1084-5843 charles_van_riper@usgs.gov","orcid":"https://orcid.org/0000-0003-1084-5843","contributorId":169488,"corporation":false,"usgs":true,"family":"van Riper","given":"Charles","suffix":"III","email":"charles_van_riper@usgs.gov","affiliations":[{"id":568,"text":"Southwest Biological Science Center","active":true,"usgs":true}],"preferred":false,"id":432946,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Theimer, T.C.","contributorId":31580,"corporation":false,"usgs":true,"family":"Theimer","given":"T.C.","affiliations":[],"preferred":false,"id":432945,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Paxton, E. H.","contributorId":16798,"corporation":false,"usgs":true,"family":"Paxton","given":"E.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":432944,"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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 \"}}]}","volume":"43","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb957e4b08c986b327bd3","contributors":{"authors":[{"text":"Romanyuk, T.","contributorId":107930,"corporation":false,"usgs":true,"family":"Romanyuk","given":"T.","affiliations":[],"preferred":false,"id":433044,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mooney, Walter D. 0000-0002-5310-3631 mooney@usgs.gov","orcid":"https://orcid.org/0000-0002-5310-3631","contributorId":3194,"corporation":false,"usgs":true,"family":"Mooney","given":"Walter","email":"mooney@usgs.gov","middleInitial":"D.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":433043,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Detweiler, Shane T. 0000-0001-5699-011X shane@usgs.gov","orcid":"https://orcid.org/0000-0001-5699-011X","contributorId":680,"corporation":false,"usgs":true,"family":"Detweiler","given":"Shane","email":"shane@usgs.gov","middleInitial":"T.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":433042,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031771,"text":"70031771 - 2007 - Characterization of post-fire surface cover, soils, and burn severity at the Cerro Grande Fire, New Mexico, using hyperspectral and multispectral remote sensing","interactions":[],"lastModifiedDate":"2012-03-12T17:21:14","indexId":"70031771","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3254,"text":"Remote Sensing of Environment","printIssn":"0034-4257","active":true,"publicationSubtype":{"id":10}},"title":"Characterization of post-fire surface cover, soils, and burn severity at the Cerro Grande Fire, New Mexico, using hyperspectral and multispectral remote sensing","docAbstract":"Forest fires leave behind a changed ecosystem with a patchwork of surface cover that includes ash, charred organic matter, soils and soil minerals, and dead, damaged, and living vegetation. The distributions of these materials affect post-fire processes of erosion, nutrient cycling, and vegetation regrowth. We analyzed high spatial resolution (2.4??m pixel size) Airborne Visible and Infrared Imaging Spectrometer (AVIRIS) data collected over the Cerro Grande fire, to map post-fire surface cover into 10 classes, including ash, soil minerals, scorched conifer trees, and green vegetation. The Cerro Grande fire occurred near Los Alamos, New Mexico, in May 2000. The AVIRIS data were collected September 3, 2000. The surface cover map revealed complex patterns of ash, iron oxide minerals, and clay minerals in areas of complete combustion. Scorched conifer trees, which retained dry needles heated by the fire but not fully combusted by the flames, were found to cover much of the post-fire landscape. These scorched trees were found in narrow zones at the edges of completely burned areas. A surface cover map was also made using Landsat Enhanced Thematic Mapper plus (ETM+) data, collected September 5, 2000, and a maximum likelihood, supervised classification. When compared to AVIRIS, the Landsat classification grossly overestimated cover by dry conifer and ash classes and severely underestimated soil and green vegetation cover. In a comparison of AVIRIS surface cover to the Burned Area Emergency Rehabilitation (BAER) map of burn severity, the BAER high burn severity areas did not capture the variable patterns of post-fire surface cover by ash, soil, and scorched conifer trees seen in the AVIRIS map. The BAER map, derived from air photos, also did not capture the distribution of scorched trees that were observed in the AVIRIS map. Similarly, the moderate severity class of Landsat-derived burn severity maps generated from the differenced Normalized Burn Ratio (dNBR) calculation had low agreement with the AVIRIS classes of scorched conifer trees. Burn severity and surface cover images were found to contain complementary information, with the dNBR map presenting an image of degree of change caused by fire and the AVIRIS-derived map showing specific surface cover resulting from fire.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Remote Sensing of Environment","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.rse.2006.08.006","issn":"00344257","usgsCitation":"Kokaly, R., Rockwell, B., Haire, S., and King, T.V., 2007, Characterization of post-fire surface cover, soils, and burn severity at the Cerro Grande Fire, New Mexico, using hyperspectral and multispectral remote sensing: Remote Sensing of Environment, v. 106, no. 3, p. 305-325, https://doi.org/10.1016/j.rse.2006.08.006.","startPage":"305","endPage":"325","numberOfPages":"21","costCenters":[],"links":[{"id":239678,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212224,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.rse.2006.08.006"}],"volume":"106","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f4d6e4b0c8380cd4bf5a","contributors":{"authors":[{"text":"Kokaly, R.F. 0000-0003-0276-7101","orcid":"https://orcid.org/0000-0003-0276-7101","contributorId":42381,"corporation":false,"usgs":true,"family":"Kokaly","given":"R.F.","affiliations":[],"preferred":false,"id":433047,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rockwell, B.W.","contributorId":73396,"corporation":false,"usgs":true,"family":"Rockwell","given":"B.W.","email":"","affiliations":[],"preferred":false,"id":433048,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Haire, S.L.","contributorId":23503,"corporation":false,"usgs":true,"family":"Haire","given":"S.L.","email":"","affiliations":[],"preferred":false,"id":433046,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"King, T. V. V.","contributorId":6192,"corporation":false,"usgs":true,"family":"King","given":"T.","email":"","middleInitial":"V. V.","affiliations":[],"preferred":false,"id":433045,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"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":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":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":70031802,"text":"70031802 - 2007 - High nutrient pulses, tidal mixing and biological response in a small California estuary: Variability in nutrient concentrations from decadal to hourly time scales","interactions":[],"lastModifiedDate":"2012-03-12T17:21:06","indexId":"70031802","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1587,"text":"Estuarine, Coastal and Shelf Science","active":true,"publicationSubtype":{"id":10}},"title":"High nutrient pulses, tidal mixing and biological response in a small California estuary: Variability in nutrient concentrations from decadal to hourly time scales","docAbstract":"Elkhorn Slough is a small estuary in Central California, where nutrient inputs are dominated by runoff from agricultural row crops, a golf course, and residential development. We examined the variability in nutrient concentrations from decadal to hourly time scales in Elkhorn Slough to compare forcing by physical and biological factors. Hourly data were collected using in situ nitrate analyzers and water quality data sondes, and two decades of monthly monitoring data were analyzed. Nutrient concentrations increased from the mid 1970s to 1990s as pastures and woodlands were converted to row crops and population increased in the watershed. Climatic variability was also a significant factor controlling interannual nutrient variability, with higher nutrient concentrations during wet than drought years. Elkhorn Slough has a Mediterranean climate with dry and rainy seasons. Dissolved inorganic nitrogen (DIN) concentrations were relatively low (10-70 ??mol L-1) during the dry season and high (20-160 ??mol L-1) during the rainy season. Dissolved inorganic phosphorus (DIP) concentrations showed the inverse pattern, with higher concentrations during the dry season. Pulsed runoff events were a consistent feature controlling nitrate concentrations during the rainy season. Peak nitrate concentrations lagged runoff events by 1 to 6 days. Tidal exchange with Monterey Bay was also an important process controlling nutrient concentrations, particularly near the mouth of the Slough. Biological processes had the greatest effect on nitrate concentrations during the dry season and were less important during the rainy season. While primary production was enhanced by nutrient pulses, chlorophyll a concentrations were not. We believe that the generally weak biological response compared to the strong physical forcing in Elkhorn Slough occurred because the short residence time and tidal mixing rapidly diluted nutrient pulses. ?? 2006 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Estuarine, Coastal and Shelf Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.ecss.2006.08.015","issn":"02727714","usgsCitation":"Caffrey, J., Chapin, T., Jannasch, H., and Haskins, J., 2007, High nutrient pulses, tidal mixing and biological response in a small California estuary: Variability in nutrient concentrations from decadal to hourly time scales: Estuarine, Coastal and Shelf Science, v. 71, no. 3-4, p. 368-380, https://doi.org/10.1016/j.ecss.2006.08.015.","startPage":"368","endPage":"380","numberOfPages":"13","costCenters":[],"links":[{"id":240157,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212641,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.ecss.2006.08.015"}],"volume":"71","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a30c1e4b0c8380cd5d8fb","contributors":{"authors":[{"text":"Caffrey, J.M.","contributorId":98750,"corporation":false,"usgs":true,"family":"Caffrey","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":433194,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chapin, T.P. 0000-0001-6587-0734","orcid":"https://orcid.org/0000-0001-6587-0734","contributorId":24142,"corporation":false,"usgs":true,"family":"Chapin","given":"T.P.","affiliations":[],"preferred":false,"id":433192,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Jannasch, H.W.","contributorId":89665,"corporation":false,"usgs":true,"family":"Jannasch","given":"H.W.","email":"","affiliations":[],"preferred":false,"id":433193,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Haskins, J.C.","contributorId":7473,"corporation":false,"usgs":true,"family":"Haskins","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":433191,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"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":70031804,"text":"70031804 - 2007 - Geologic mapping of the Amirani-Gish Bar region of Io: Implications for the global geologic mapping of Io","interactions":[],"lastModifiedDate":"2018-11-07T11:09:04","indexId":"70031804","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1963,"text":"Icarus","active":true,"publicationSubtype":{"id":10}},"title":"Geologic mapping of the Amirani-Gish Bar region of Io: Implications for the global geologic mapping of Io","docAbstract":"<p>We produced the first geologic map of the Amirani-Gish Bar region of Io, the last of four regional maps generated from Galileo mission data. The Amirani-Gish Bar region has five primary types of geologic materials: plains, mountains, patera floors, flows, and diffuse deposits. The flows and patera floors are thought to be compositionally similar, but are subdivided based on interpretations regarding their emplacement environments and mechanisms. Our mapping shows that volcanic activity in the Amirani-Gish Bar region is dominated by the Amirani Eruptive Center (AEC), now recognized to be part of an extensive, combined Amirani-Maui flow field. A mappable flow connects Amirani and Maui, suggesting that Maui is fed from Amirani, such that the post-Voyager designation \"Maui Eruptive Center\" should be revised. Amirani contains at least four hot spots detected by Galileo, and is the source of widespread bright (sulfur?) flows and active dark (silicate?) flows being emplaced in the Promethean style (slowly emplaced, compound flow fields). The floor of Gish Bar Patera has been partially resurfaced by dark lava flows, although other parts of its floor are bright and appeared unchanged during the Galileo mission. This suggests that the floor did not undergo complete resurfacing as a lava lake as proposed for other ionian paterae. There are several other hot spots in the region that are the sources of both active dark flows (confined within paterae), and SO2- and S2-rich diffuse deposits. Mapped diffuse deposits around fractures on mountains and in the plains appear to serve as the source for gas venting without the release of magma, an association previously unrecognized in this region. The six mountains mapped in this region exhibit various states of degradation. In addition to gaining insight into this region of Io, all four maps are studied to assess the best methodology to use to produce a new global geologic map of Io based on the newly released, combined Galileo-Voyager global mosaics. To convey the complexity of ionian surface geology, we find that a new global geologic map of Io should include a map sheet displaying the global abundances and types of surface features as well as a complementary GIS database as a means to catalog the record of surface changes observed since the Voyager flybys and during the Galileo mission.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Icarus","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.icarus.2006.08.023","issn":"00191035","usgsCitation":"Williams, D., Keszthelyi, L., Crown, D.A., Jaeger, W.L., and Schenk, P., 2007, Geologic mapping of the Amirani-Gish Bar region of Io: Implications for the global geologic mapping of Io: Icarus, v. 186, no. 1, p. 204-217, https://doi.org/10.1016/j.icarus.2006.08.023.","productDescription":"14 p.","startPage":"204","endPage":"217","numberOfPages":"14","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":239644,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"186","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1fc5e4b0c8380cd5696d","contributors":{"authors":[{"text":"Williams, David A.","contributorId":84604,"corporation":false,"usgs":true,"family":"Williams","given":"David A.","affiliations":[],"preferred":false,"id":433202,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Keszthelyi, Laszlo P. 0000-0003-1879-4331 laz@usgs.gov","orcid":"https://orcid.org/0000-0003-1879-4331","contributorId":52802,"corporation":false,"usgs":true,"family":"Keszthelyi","given":"Laszlo P.","email":"laz@usgs.gov","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":433199,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Crown, David A.","contributorId":196622,"corporation":false,"usgs":false,"family":"Crown","given":"David","email":"","middleInitial":"A.","affiliations":[{"id":24732,"text":"Planetary Science Institute, Tucson","active":true,"usgs":false}],"preferred":false,"id":433203,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jaeger, Windy L.","contributorId":61679,"corporation":false,"usgs":true,"family":"Jaeger","given":"Windy","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":433201,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Schenk, Paul M.","contributorId":66946,"corporation":false,"usgs":false,"family":"Schenk","given":"Paul M.","affiliations":[{"id":12445,"text":"Lunar and Planetary Institute","active":true,"usgs":false}],"preferred":false,"id":433200,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"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":70031836,"text":"70031836 - 2007 - Pumping-induced drawdown and stream depletion in a leaky aquifer system","interactions":[],"lastModifiedDate":"2012-03-12T17:21:25","indexId":"70031836","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"Pumping-induced drawdown and stream depletion in a leaky aquifer system","docAbstract":"The impact of ground water pumping on nearby streams is often estimated using analytic models of the interconnected stream-aquifer system. A common assumption of these models is that the pumped aquifer is underlain by an impermeable formation. A new semianalytic solution for drawdown and stream depletion has been developed that does not require this assumption. This solution shows that pumping-induced flow (leakage) through an underlying aquitard can be an important recharge mechanism in many stream-aquifer systems. The relative importance of this source of recharge increases with the distance between the pumping well and the stream. The distance at which leakage becomes the primary component of the pumping-induced recharge depends on the specific properties of the aquifer, aquitard, and streambed. Even when the aquitard is orders of magnitude less transmissive than the aquifer, leakage can be an important recharge mechanism because of the large surface area over which it occurs. Failure to consider aquitard leakage can lead to large overestimations of both the drawdown produced by pumping and the contribution of stream depletion to the pumping-induced recharge. The ramifications for water resources management and water rights adjudication can be significant. A hypothetical example helps illustrate these points and demonstrates that more attention should be given to estimating the properties of aquitards underlying stream-aquifer systems. The solution presented here should serve as a relatively simple but versatile tool for practical assessments of pumping-induced stream-aquifer interactions. However, this solution should not be used for such assessments without site-specific data that indicate pumping has induced leakage through the aquitard. ?? 2006 National Ground Water Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1745-6584.2006.00272.x","issn":"0017467X","usgsCitation":"Butler, J., Zhan, X., and Zlotnik, V., 2007, Pumping-induced drawdown and stream depletion in a leaky aquifer system: Ground Water, v. 45, no. 2, p. 178-186, https://doi.org/10.1111/j.1745-6584.2006.00272.x.","startPage":"178","endPage":"186","numberOfPages":"9","costCenters":[],"links":[{"id":487033,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://digitalcommons.unl.edu/geosciencefacpub/275","text":"External Repository"},{"id":215044,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6584.2006.00272.x"},{"id":242813,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"2","noUsgsAuthors":false,"publicationDate":"2006-11-30","publicationStatus":"PW","scienceBaseUri":"505a9038e4b0c8380cd7fbe1","contributors":{"authors":[{"text":"Butler, J.J. Jr.","contributorId":12194,"corporation":false,"usgs":true,"family":"Butler","given":"J.J.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":433357,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Zhan, X.","contributorId":26477,"corporation":false,"usgs":true,"family":"Zhan","given":"X.","email":"","affiliations":[],"preferred":false,"id":433358,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zlotnik, V.A.","contributorId":102660,"corporation":false,"usgs":true,"family":"Zlotnik","given":"V.A.","email":"","affiliations":[],"preferred":false,"id":433359,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
]}