{"pageNumber":"967","pageRowStart":"24150","pageSize":"25","recordCount":40811,"records":[{"id":70031370,"text":"70031370 - 2007 - Cross-calibration of the Terra MODIS, Landsat 7 ETM+ and EO-1 ALI sensors using near-simultaneous surface observation over the Railroad Valley Playa, Nevada, test site","interactions":[],"lastModifiedDate":"2024-09-17T15:06:35.171594","indexId":"70031370","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Cross-calibration of the Terra MODIS, Landsat 7 ETM+ and EO-1 ALI sensors using near-simultaneous surface observation over the Railroad Valley Playa, Nevada, test site","docAbstract":"A cross-calibration methodology has been developed using coincident image pairs from the Terra Moderate Resolution Imaging Spectroradiometer (MODIS), the Landsat 7 (L7) Enhanced Thematic Mapper Plus (ETM+) and the Earth Observing EO-1 Advanced Land Imager (ALI) to verify the absolute radiometric calibration accuracy of these sensors with respect to each other. To quantify the effects due to different spectral responses, the Relative Spectral Responses (RSR) of these sensors were studied and compared by developing a set of \"figures-of-merit.\" Seven cloud-free scenes collected over the Railroad Valley Playa, Nevada (RVPN), test site were used to conduct the cross-calibration study. This cross-calibration approach was based on image statistics from near-simultaneous observations made by different satellite sensors. Homogeneous regions of interest (ROI) were selected in the image pairs, and the mean target statistics were converted to absolute units of at-sensor reflectance. Using these reflectances, a set of cross-calibration equations were developed giving a relative gain and bias between the sensor pair.","conferenceTitle":"Earth Observing Systems XII","conferenceDate":"August 26-28, 2007","conferenceLocation":"San Diego, CA","language":"English","doi":"10.1117/12.734292","issn":"0277786X","isbn":"9780819468253","usgsCitation":"Chander, G., Angal, A., Choi, T., Meyer, D.J., Xiong, X., and Teillet, P., 2007, Cross-calibration of the Terra MODIS, Landsat 7 ETM+ and EO-1 ALI sensors using near-simultaneous surface observation over the Railroad Valley Playa, Nevada, test site, Earth Observing Systems XII, v. 6677, San Diego, CA, August 26-28, 2007, 66770Y, 12 p., https://doi.org/10.1117/12.734292.","productDescription":"66770Y, 12 p.","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":239786,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"6677","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fcc1e4b0c8380cd4e400","contributors":{"authors":[{"text":"Chander, G.","contributorId":51449,"corporation":false,"usgs":true,"family":"Chander","given":"G.","affiliations":[],"preferred":false,"id":431230,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Angal, A.","contributorId":52716,"corporation":false,"usgs":true,"family":"Angal","given":"A.","affiliations":[],"preferred":false,"id":431231,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Choi, T.","contributorId":48698,"corporation":false,"usgs":true,"family":"Choi","given":"T.","affiliations":[],"preferred":false,"id":431229,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Meyer, D. J.","contributorId":46721,"corporation":false,"usgs":true,"family":"Meyer","given":"D.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":431228,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Xiong, X.","contributorId":37885,"corporation":false,"usgs":true,"family":"Xiong","given":"X.","affiliations":[],"preferred":false,"id":431227,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Teillet, P.M.","contributorId":23717,"corporation":false,"usgs":true,"family":"Teillet","given":"P.M.","email":"","affiliations":[],"preferred":false,"id":431226,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70030902,"text":"70030902 - 2007 - Composite analysis for Escherichia coli at coastal beaches","interactions":[],"lastModifiedDate":"2012-03-12T17:21:15","indexId":"70030902","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":"Composite analysis for Escherichia coli at coastal beaches","docAbstract":"At some coastal beaches, concentrations of fecal-indicator bacteria can differ substantially between multiple points at the same beach at the same time. Because of this spatial variability, the recreational water quality at beaches is sometimes determined by stratifying a beach into several areas and collecting a sample from each area to analyze for the concentration of fecal-indicator bacteria. The average concentration of bacteria from those points is often used to compare to the recreational standard for advisory postings. Alternatively, if funds are limited, a single sample is collected to represent the beach. Compositing the samples collected from each section of the beach may yield equally accurate data as averaging concentrations from multiple points, at a reduced cost. In the study described herein, water samples were collected at multiple points from three Lake Erie beaches and analyzed for Escherichia coli on modified mTEC agar (EPA Method 1603). From the multiple-point samples, a composite sample (n = 116) was formed at each beach by combining equal aliquots of well-mixed water from each point. Results from this study indicate that E. coli concentrations from the arithmetic average of multiple-point samples and from composited samples are not significantly different (t = 1.59, p = 0.1139) and yield similar measures of recreational water quality; additionally, composite samples could result in a significant cost savings.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Great Lakes Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.3394/0380-1330(2007)33[335:CAFECA]2.0.CO;2","issn":"03801330","usgsCitation":"Bertke, E., 2007, Composite analysis for Escherichia coli at coastal beaches: Journal of Great Lakes Research, v. 33, no. 2, p. 335-341, https://doi.org/10.3394/0380-1330(2007)33[335:CAFECA]2.0.CO;2.","startPage":"335","endPage":"341","numberOfPages":"7","costCenters":[],"links":[{"id":211444,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3394/0380-1330(2007)33[335:CAFECA]2.0.CO;2"},{"id":238735,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"33","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f916e4b0c8380cd4d417","contributors":{"authors":[{"text":"Bertke, E.E.","contributorId":24990,"corporation":false,"usgs":true,"family":"Bertke","given":"E.E.","email":"","affiliations":[],"preferred":false,"id":429145,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70031552,"text":"70031552 - 2007 - Topography and geomorphology of the Huygens landing site on Titan","interactions":[],"lastModifiedDate":"2018-12-07T15:59:49","indexId":"70031552","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3083,"text":"Planetary and Space Science","active":true,"publicationSubtype":{"id":10}},"title":"Topography and geomorphology of the Huygens landing site on Titan","docAbstract":"<p><span>The Descent Imager/Spectral Radiometer (DISR) aboard the Huygens Probe took several hundred visible-light images with its three cameras on approach to the surface of Titan. Several sets of stereo image pairs were collected during the descent. The digital terrain models constructed from those images show rugged topography, in places approaching the angle of repose, adjacent to flatter darker plains. Brighter regions north of the landing site display two styles of drainage patterns: (1) bright highlands with rough topography and deeply incised branching dendritic drainage networks (up to fourth order) with dark-floored valleys that are suggestive of erosion by methane rainfall and (2) short, stubby low-order drainages that follow linear fault patterns forming canyon-like features suggestive of methane spring-sapping. The topographic data show that the bright highland terrains are extremely rugged; slopes of order of 30° appear common. These systems drain into adjacent relatively flat, dark lowland terrains. A stereo model for part of the dark plains region to the east of the landing site suggests surface scour across this plain flowing from west to east leaving ∼100-m-high bright ridges. Tectonic patterns are evident in (1) controlling the rectilinear, low-order, stubby drainages and (2) the “coastline” at the highland–lowland boundary with numerous straight and angular margins. In addition to flow from the highlands drainages, the lowland area shows evidence for more prolific flow parallel to the highland–lowland boundary leaving bright outliers resembling terrestrial sandbars. This implies major west to east floods across the plains where the probe landed with flow parallel to the highland–lowland boundary; the primary source of these flows is evidently not the dendritic channels in the bright highlands to the north.</span></p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Planetary and Space Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.pss.2007.04.015","issn":"00320633","usgsCitation":"Soderblom, L.A., Tomasko, M.G., Archinal, B.A., Becker, T.L., Bushroe, M.W., Cook, D., Doose, L.R., Galuszka, D.M., Hare, T.M., Howington-Kraus, E., Karkoschka, E., Kirk, R.L., Lunine, J.I., McFarlane, E.A., Redding, B.L., Rizk, B., Rosiek, M.R., See, C., and Smith, P.H., 2007, Topography and geomorphology of the Huygens landing site on Titan: Planetary and Space Science, v. 55, no. 13, p. 2015-2024, https://doi.org/10.1016/j.pss.2007.04.015.","productDescription":"10 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G.","contributorId":147252,"corporation":false,"usgs":false,"family":"Tomasko","given":"Martin","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":432074,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Archinal, Brent A. 0000-0002-6654-0742 barchinal@usgs.gov","orcid":"https://orcid.org/0000-0002-6654-0742","contributorId":2816,"corporation":false,"usgs":true,"family":"Archinal","given":"Brent","email":"barchinal@usgs.gov","middleInitial":"A.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":432060,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Becker, Tammy L. tbecker@usgs.gov","contributorId":4388,"corporation":false,"usgs":true,"family":"Becker","given":"Tammy","email":"tbecker@usgs.gov","middleInitial":"L.","affiliations":[{"id":131,"text":"Astrogeology Science 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thare@usgs.gov","orcid":"https://orcid.org/0000-0001-8842-389X","contributorId":3188,"corporation":false,"usgs":true,"family":"Hare","given":"Trent","email":"thare@usgs.gov","middleInitial":"M.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":432065,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Howington-Kraus, Elpitha 0000-0001-5787-6554 ahowington@usgs.gov","orcid":"https://orcid.org/0000-0001-5787-6554","contributorId":2815,"corporation":false,"usgs":true,"family":"Howington-Kraus","given":"Elpitha","email":"ahowington@usgs.gov","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":432064,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Karkoschka, Erich","contributorId":147250,"corporation":false,"usgs":false,"family":"Karkoschka","given":"Erich","email":"","affiliations":[],"preferred":false,"id":432063,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Kirk, Randolph L. 0000-0003-0842-9226 rkirk@usgs.gov","orcid":"https://orcid.org/0000-0003-0842-9226","contributorId":2765,"corporation":false,"usgs":true,"family":"Kirk","given":"Randolph","email":"rkirk@usgs.gov","middleInitial":"L.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":432073,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Lunine, Jonathan I.","contributorId":82447,"corporation":false,"usgs":true,"family":"Lunine","given":"Jonathan","email":"","middleInitial":"I.","affiliations":[],"preferred":false,"id":432066,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"McFarlane, Elisabeth 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Bashar","contributorId":24257,"corporation":false,"usgs":true,"family":"Rizk","given":"Bashar","email":"","affiliations":[],"preferred":false,"id":432069,"contributorType":{"id":1,"text":"Authors"},"rank":16},{"text":"Rosiek, Mark R. mrosiek@usgs.gov","contributorId":824,"corporation":false,"usgs":true,"family":"Rosiek","given":"Mark","email":"mrosiek@usgs.gov","middleInitial":"R.","affiliations":[],"preferred":true,"id":432059,"contributorType":{"id":1,"text":"Authors"},"rank":17},{"text":"See, Charles","contributorId":211199,"corporation":false,"usgs":false,"family":"See","given":"Charles","email":"","affiliations":[{"id":36888,"text":"Lunar and Planetary Laboratory, University of Arizona","active":true,"usgs":false}],"preferred":false,"id":432068,"contributorType":{"id":1,"text":"Authors"},"rank":18},{"text":"Smith, Peter H.","contributorId":211201,"corporation":false,"usgs":false,"family":"Smith","given":"Peter","email":"","middleInitial":"H.","affiliations":[{"id":36888,"text":"Lunar and Planetary Laboratory, University of Arizona","active":true,"usgs":false}],"preferred":false,"id":432072,"contributorType":{"id":1,"text":"Authors"},"rank":19}]}}
,{"id":70033408,"text":"70033408 - 2007 - Landscape correlates along mourning dove call-count routes in Mississippi","interactions":[],"lastModifiedDate":"2012-03-12T17:21:38","indexId":"70033408","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Landscape correlates along mourning dove call-count routes in Mississippi","docAbstract":"Mourning dove (Zenaida macroura) call-count surveys in Mississippi, USA, suggest declining populations. We used available mourning dove call-count data to evaluate long-term mourning dove habitat relationships. Dove routes were located in the Mississippi Alluvial Valley, Deep Loess Province, Mid Coastal Plain, and Hilly Coastal Plain physiographic provinces of Mississippi. We also included routes in the Blackbelt Prairie region of Mississippi and Alabama, USA. We characterized landscape structure and composition within 1.64-km buffers around 10 selected mourning dove call-count routes during 3 time periods. Habitat classes included agriculture, forest, urban, regeneration stands, wetland, and woodlot. We used Akaike's Information Criterion to select the best candidate model. We selected a model containing percent agriculture and edge density that contained approximately 40% of the total variability in the data set. Percent agriculture was positively correlated with relative dove abundance. Interestingly, we found a negative relationship between edge density and dove abundance. Researchers should conduct future research on dove nesting patterns in Mississippi and threshold levels of edge necessary to maximize dove density. During the last 20 years, Mississippi lost more than 800,000 ha of cropland while forest cover represented largely by pine (Pinus taeda) plantations increased by more than 364,000 ha. Our results suggest observed localized declines in mourning dove abundance in Mississippi may be related to the documented conversion of agricultural lands to pine plantations.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Wildlife Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2193/2004-267","issn":"00225","usgsCitation":"Elmore, R., Vilella, F., and Gerard, P., 2007, Landscape correlates along mourning dove call-count routes in Mississippi: Journal of Wildlife Management, v. 71, no. 2, p. 422-427, https://doi.org/10.2193/2004-267.","startPage":"422","endPage":"427","numberOfPages":"6","costCenters":[],"links":[{"id":213142,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2193/2004-267"},{"id":240737,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"71","issue":"2","noUsgsAuthors":false,"publicationDate":"2010-12-13","publicationStatus":"PW","scienceBaseUri":"505a4409e4b0c8380cd667d2","contributors":{"authors":[{"text":"Elmore, R.D.","contributorId":64450,"corporation":false,"usgs":true,"family":"Elmore","given":"R.D.","email":"","affiliations":[],"preferred":false,"id":440746,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Vilella, F. J.","contributorId":82025,"corporation":false,"usgs":false,"family":"Vilella","given":"F. J.","affiliations":[],"preferred":false,"id":440747,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gerard, P.D.","contributorId":16368,"corporation":false,"usgs":true,"family":"Gerard","given":"P.D.","email":"","affiliations":[],"preferred":false,"id":440745,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029993,"text":"70029993 - 2007 - A shifting mosaic of scholarly publishing, scientific delivery, and future impact changing the face of learned societies","interactions":[],"lastModifiedDate":"2012-03-12T17:21:36","indexId":"70029993","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2373,"text":"Journal of Mammalogy","onlineIssn":"1545-1542","printIssn":"0022-2372","active":true,"publicationSubtype":{"id":10}},"title":"A shifting mosaic of scholarly publishing, scientific delivery, and future impact changing the face of learned societies","docAbstract":"Nonprofit scientific societies hope that their activities advance their particular mission and impact their profession and, in the broadest sense, humanity in positive ways. The digital age has provided unprecedented mechanisms to enhance the delivery of science to the world. The marketplace of scientific publishing is a rapidly shifting mosaic of challenges and opportunities, and the responses of nonprofit and commercial publishers vary widely, but their outcomes are still uncertain. The response of the American Society of Mammalogists (ASM) provides an example of how a relatively small society has altered its scientific delivery to enhance member benefits while attempting to sustain its economic viability. Since 2000, ASM has moved from a self-publishing, break-even, print-only model to a copublishing agreement with a commercial publisher (Alliance Communications Group, a division of Allen Press, Inc., Lawrence, Kansas), which now offers members various print and electronic options and generates a shared royalty. Although it is too early to gauge the economic impact of these changes, the ASM leadership clearly attempted to signal its desire for members to view their society as a package of opportunities for edification and involvement rather than just a provider of serial subscriptions. Future challenges facing nonprofit scientific societies include open access, fiscal realities, archiving of publications, and scientific and societal impact; future opportunities include a strengthening of member responsibilities and professionalism, development of data registries to enhance scientific progress, and bundling of like societies. The manner in which nonprofit scientific societies respond to these challenges and opportunities will no doubt affect their sustainability and future impact. ?? 2007 American Society of Mammalogists.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Mammalogy","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1644/06-MAMM-F-418.1","issn":"00222372","usgsCitation":"Leslie, D., 2007, A shifting mosaic of scholarly publishing, scientific delivery, and future impact changing the face of learned societies: Journal of Mammalogy, v. 88, no. 2, p. 275-286, https://doi.org/10.1644/06-MAMM-F-418.1.","startPage":"275","endPage":"286","numberOfPages":"12","costCenters":[],"links":[{"id":477025,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1644/06-mamm-f-418.1","text":"Publisher Index Page"},{"id":213072,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1644/06-MAMM-F-418.1"},{"id":240657,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"88","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-04-20","publicationStatus":"PW","scienceBaseUri":"5059e588e4b0c8380cd46dd1","contributors":{"authors":[{"text":"Leslie, David M. Jr.","contributorId":52514,"corporation":false,"usgs":true,"family":"Leslie","given":"David M.","suffix":"Jr.","affiliations":[],"preferred":false,"id":425205,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70030135,"text":"70030135 - 2007 - Quantifying the media bias in intensity surveys: Lessons from the 2001 Bhuj, India, earthquake","interactions":[],"lastModifiedDate":"2012-03-12T17:21:06","indexId":"70030135","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"title":"Quantifying the media bias in intensity surveys: Lessons from the 2001 Bhuj, India, earthquake","docAbstract":"Many seismologists have looked at the 26 January 2001 Bhuj earthquake as a key modern calibration event that could be used to improve estimates of magnitudes of large historic mainshocks in stable continental regions. Since no instrumental data are available for important historic events such as the 1819 Allah Bund, India, and the 1811-1812 New Madrid, central U.S. mainshocks, calibration hinges on comparisons of the macroseismic effects of these earthquakes with those of comparable modern earthquakes for which a reliable, instrumentally determined moment magnitude is available. However, although such a comparison is conceptually straightforward, in practice it is complicated by potentially significant inconsistencies in methods used to quantify macroseismic effects in different regions and/or times. For the Bhuj earthquake, extensive intensity data sets have been compiled and published from both media accounts and detailed direct surveys. Comparing the two provides a quantification of the previously suspected media bias, whereby earthquake effects can be exaggerated in media accounts. This bias is a strong function of intensity level, with substantial bias at the highest shaking levels and significantly less bias at low intensities. Because only sparse documentary data are in general available for older historic earthquakes, the results of this study suggest that their inferred intensity distributions might be similarly biased. We further use the survey-based intensity values to develop a new relationship between intensities and ground motions.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin of the Seismological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1785/0120060072","issn":"00371106","usgsCitation":"Hough, S., and Pande, P., 2007, Quantifying the media bias in intensity surveys: Lessons from the 2001 Bhuj, India, earthquake: Bulletin of the Seismological Society of America, v. 97, no. 2, p. 638-645, https://doi.org/10.1785/0120060072.","startPage":"638","endPage":"645","numberOfPages":"8","costCenters":[],"links":[{"id":477125,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://resolver.caltech.edu/CaltechAUTHORS:20140801-141746941","text":"External Repository"},{"id":212731,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1785/0120060072"},{"id":240263,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"97","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a91ebe4b0c8380cd80538","contributors":{"authors":[{"text":"Hough, S. E. 0000-0002-5980-2986","orcid":"https://orcid.org/0000-0002-5980-2986","contributorId":7316,"corporation":false,"usgs":true,"family":"Hough","given":"S. E.","affiliations":[],"preferred":false,"id":425846,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pande, P.","contributorId":61245,"corporation":false,"usgs":true,"family":"Pande","given":"P.","email":"","affiliations":[],"preferred":false,"id":425847,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029970,"text":"70029970 - 2007 - Ammonia causes decreased brain monoamines in fathead minnows (Pimephales promelas)","interactions":[],"lastModifiedDate":"2016-10-13T10:52:23","indexId":"70029970","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1074,"text":"Brain Research","active":true,"publicationSubtype":{"id":10}},"title":"Ammonia causes decreased brain monoamines in fathead minnows (Pimephales promelas)","docAbstract":"<p>Hyperammonemia, arising from variety of disorders, leads to severe neurological dysfunction. The mechanisms of ammonia toxicity in brain are not completely understood. This study investigated the effects of ammonia on monoaminergic systems in brains of fathead minnows (Pimephales promelas). Fish serve as a good model system to investigate hyperammonemic effects on brain function since no liver manipulations are necessary to increase endogenous ammonia concentrations. Using high performance liquid chromatography with electrochemical detection, monoamines and some associated metabolites were measured from whole brain homogenate. Adult males were exposed for 48 h to six different concentrations of ammonia (0.01–2.36 mg/l unionized) which bracketed the 96-h LC50 for this species. Ammonia concentration-dependent decreases were found for the catecholamines (norepinephrine and dopamine) and the indoleamine serotonin (5-HT). After an initial increase in the 5-HT precursor 5-hydroxytryptophan it too decreased with increasing ammonia concentrations. There were also significant increases in the 5-HIAA/5-HT and DOPAC/DA ratios, often used as measures of turnover. There were no changes in epinephrine (Epi) or monoamine catabolites (DOPAC, 5-HIAA) at any ammonia concentrations tested. Results suggest that ammonia causes decreased synthesis while also causing increased release and degradation. Increased release may underlie behavioral reactions to ammonia exposure in fish. This study adds weight to a growing body of evidence demonstrating that ammonia leads to dysfunctional monoaminergic systems in brain which may underlie neurological symptoms associated with human disorders such as hepatic encephalopathy.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.brainres.2007.02.015","issn":"00068993","usgsCitation":"Ronan, P.J., Gaikowski, M., Hamilton, S., Buhl, K.J., and Summers, C.H., 2007, Ammonia causes decreased brain monoamines in fathead minnows (Pimephales promelas): Brain Research, v. 1147, p. 184-191, https://doi.org/10.1016/j.brainres.2007.02.015.","productDescription":"8 p.","startPage":"184","endPage":"191","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"links":[{"id":240322,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212784,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.brainres.2007.02.015"}],"volume":"1147","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e9bde4b0c8380cd4840f","contributors":{"authors":[{"text":"Ronan, Patrick J.","contributorId":175335,"corporation":false,"usgs":false,"family":"Ronan","given":"Patrick","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":425125,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gaikowski, Mark P. 0000-0002-6507-9341 mgaikowski@usgs.gov","orcid":"https://orcid.org/0000-0002-6507-9341","contributorId":140353,"corporation":false,"usgs":true,"family":"Gaikowski","given":"Mark P.","email":"mgaikowski@usgs.gov","affiliations":[{"id":606,"text":"Upper Midwest Environmental Sciences Center","active":true,"usgs":true}],"preferred":false,"id":425124,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hamilton, Steven J.","contributorId":174108,"corporation":false,"usgs":false,"family":"Hamilton","given":"Steven J.","affiliations":[],"preferred":false,"id":425122,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Buhl, Kevin J. 0000-0002-9963-2352 kevin_buhl@usgs.gov","orcid":"https://orcid.org/0000-0002-9963-2352","contributorId":1396,"corporation":false,"usgs":true,"family":"Buhl","given":"Kevin","email":"kevin_buhl@usgs.gov","middleInitial":"J.","affiliations":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"preferred":true,"id":425121,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Summers, Cliff H.","contributorId":66218,"corporation":false,"usgs":true,"family":"Summers","given":"Cliff","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":425123,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70030890,"text":"70030890 - 2007 - Ecohydrological controls on soil moisture and hydraulic conductivity within a pinyon‐juniper woodland","interactions":[],"lastModifiedDate":"2018-04-03T12:16:30","indexId":"70030890","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Ecohydrological controls on soil moisture and hydraulic conductivity within a pinyon‐juniper woodland","docAbstract":"<p><span>The impact of pinyon‐juniper woodland encroachment on rangeland ecosystems is often associated with a reduction of streamflow and recharge and an increase in soil erosion. The objective of this study is to investigate vegetational control on seasonal soil hydrologic properties along a 15‐m transect in pinyon‐juniper woodland with biocrust. We demonstrate that the juniper tree controls soil water content (SWC) patterns directly under the canopy via interception, and beyond the canopy via shading in a preferred orientation, opposite to the prevailing wind direction. The juniper also controls the SWC and unsaturated hydraulic conductivity measured close to water saturation (</span><i>K</i><span>(</span><i>h</i><span>)) under the canopy by the creation of soil water repellency due to needle drop. We use this information to refine the hydrologic functional unit (HFU) concept into three interacting hydrologic units: canopy patches, intercanopy patches, and a transitional unit formed by intercanopy patches in the rain shadow of the juniper tree. Spatial autoregressive state‐space models show the close relationship between<span>&nbsp;</span></span><i>K</i><span>(</span><i>h</i><span>) close to soil water saturation and SWC at medium and low levels, integrating a number of influences on hydraulic conductivity.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2006WR005398","usgsCitation":"Lebron, I., Madsen, M., Chandler, D., Robinson, D., Wendroth, O., and Belnap, J., 2007, Ecohydrological controls on soil moisture and hydraulic conductivity within a pinyon‐juniper woodland: Water Resources Research, v. 43, no. 8, Article W08422; 15 p., https://doi.org/10.1029/2006WR005398.","productDescription":"Article W08422; 15 p.","costCenters":[],"links":[{"id":477215,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006wr005398","text":"Publisher Index Page"},{"id":238530,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"43","issue":"8","noUsgsAuthors":false,"publicationDate":"2007-08-22","publicationStatus":"PW","scienceBaseUri":"505a053de4b0c8380cd50d04","contributors":{"authors":[{"text":"Lebron, I.","contributorId":94170,"corporation":false,"usgs":true,"family":"Lebron","given":"I.","email":"","affiliations":[],"preferred":false,"id":429106,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Madsen, M.D.","contributorId":37216,"corporation":false,"usgs":true,"family":"Madsen","given":"M.D.","email":"","affiliations":[],"preferred":false,"id":429103,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Chandler, D.G.","contributorId":105180,"corporation":false,"usgs":true,"family":"Chandler","given":"D.G.","email":"","affiliations":[],"preferred":false,"id":429107,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Robinson, D.A.","contributorId":64895,"corporation":false,"usgs":true,"family":"Robinson","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":429104,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Wendroth, O.","contributorId":82533,"corporation":false,"usgs":true,"family":"Wendroth","given":"O.","email":"","affiliations":[],"preferred":false,"id":429105,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Belnap, J. 0000-0001-7471-2279","orcid":"https://orcid.org/0000-0001-7471-2279","contributorId":23872,"corporation":false,"usgs":true,"family":"Belnap","given":"J.","affiliations":[],"preferred":false,"id":429102,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70030891,"text":"70030891 - 2007 - Isotopic analysis of N and O in nitrite and nitrate by sequential selective bacterial reduction to N2O","interactions":[],"lastModifiedDate":"2018-10-17T08:54:35","indexId":"70030891","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":761,"text":"Analytical Chemistry","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Isotopic analysis of N and O in nitrite and nitrate by sequential selective bacterial reduction to N<sub>2</sub>O","title":"Isotopic analysis of N and O in nitrite and nitrate by sequential selective bacterial reduction to N2O","docAbstract":"<p><span>Nitrite is an important intermediate species in the biogeochemical cycling of nitrogen, but its role in natural aquatic systems is poorly understood. Isotopic data can be used to study the sources and transformations of NO</span><sub>2</sub><sup>-</sup><span> in the environment, but methods for independent isotopic analyses of NO</span><sub>2</sub><sup>-</sup><span> in the presence of other N species are still new and evolving. This study demonstrates that isotopic analyses of N and O in NO</span><sub>2</sub><sup>-</sup><span> can be done by treating whole freshwater or saltwater samples with the denitrifying bacterium </span><i>Stenotrophomonas nitritireducens</i><span>, which selectively reduces NO</span><sub>2</sub><sup>-</sup><span> to N</span><sub>2</sub><span>O for isotope ratio mass spectrometry. When calibrated with solutions containing NO</span><sub>2</sub><sup>-</sup><span> with known isotopic compositions determined independently, reproducible δ</span><sup>15</sup><span>N and δ</span><sup>18</sup><span>O values were obtained at both natural-abundance levels (±0.2−0.5‰ for δ</span><sup>15</sup><span>N and ±0.4−1.0‰ for δ</span><sup>18</sup><span>O) and moderately enriched </span><sup>15</sup><span>N tracer levels (±20−50‰ for δ</span><sup>15</sup><span>N near 5000‰) for 5−20 nmol of NO</span><sub>2</sub><sup>-</sup><span> (1−20 μmol/L in 1−5 mL aliquots). This method is highly selective for NO</span><sub>2</sub><sup>-</sup><span>and was used for mixed samples containing both NO</span><sub>2</sub><sup>-</sup><span> and NO</span><sub>3</sub><sup>-</sup><span> with little or no measurable cross-contamination. In addition, mixed samples that were analyzed with </span><i>S. nitritireducens</i><span> were treated subsequently with </span><i>Pseudomonas aureofaciens</i><span> to reduce the NO</span><sub>3</sub><sup>-</sup><span> in the absence of NO</span><sub>2</sub><sup>-</sup><span>, providing isotopic analyses of NO</span><sub>2</sub><sup>-</sup><span> and NO</span><sub>3</sub><sup>-</sup><span> separately in the same aliquot. Sequential bacterial reduction methods like this one should be useful for a variety of isotopic studies aimed at understanding nitrogen cycling in aquatic environments. A test of these methods in an agricultural watershed in Indiana provides isotopic evidence for both nitrification and denitrification as sources of NO</span><sub>2</sub><sup>-</sup><span> in a small stream.</span></p>","language":"English","publisher":"ACS","doi":"10.1021/ac070176k","issn":"00032700","usgsCitation":"Bohlke, J.K., Smith, R.L., and Hannon, J.E., 2007, Isotopic analysis of N and O in nitrite and nitrate by sequential selective bacterial reduction to N2O: Analytical Chemistry, v. 79, no. 15, p. 5888-5895, https://doi.org/10.1021/ac070176k.","productDescription":"8 p.","startPage":"5888","endPage":"5895","numberOfPages":"8","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":238563,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211294,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1021/ac070176k"}],"country":"United States","state":"Indiana","volume":"79","issue":"15","noUsgsAuthors":false,"publicationDate":"2007-06-21","publicationStatus":"PW","scienceBaseUri":"505a3f93e4b0c8380cd64613","contributors":{"authors":[{"text":"Bohlke, John Karl 0000-0001-5693-6455 jkbohlke@usgs.gov","orcid":"https://orcid.org/0000-0001-5693-6455","contributorId":127841,"corporation":false,"usgs":true,"family":"Bohlke","given":"John","email":"jkbohlke@usgs.gov","middleInitial":"Karl","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":false,"id":429110,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Smith, Richard L. 0000-0002-3829-0125 rlsmith@usgs.gov","orcid":"https://orcid.org/0000-0002-3829-0125","contributorId":1592,"corporation":false,"usgs":true,"family":"Smith","given":"Richard","email":"rlsmith@usgs.gov","middleInitial":"L.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":38175,"text":"Toxics Substances Hydrology Program","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":36183,"text":"Hydro-Ecological Interactions Branch","active":true,"usgs":true}],"preferred":true,"id":429109,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hannon, Janet E. jehannon@usgs.gov","contributorId":3177,"corporation":false,"usgs":true,"family":"Hannon","given":"Janet","email":"jehannon@usgs.gov","middleInitial":"E.","affiliations":[],"preferred":true,"id":429108,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029829,"text":"70029829 - 2007 - Tag return models allowing for harvest and catch and release: Evidence of environmental and management impacts on striped bass fishing and natural mortality rates","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029829","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2886,"text":"North American Journal of Fisheries Management","active":true,"publicationSubtype":{"id":10}},"title":"Tag return models allowing for harvest and catch and release: Evidence of environmental and management impacts on striped bass fishing and natural mortality rates","docAbstract":"Catch-and-release fisheries have become very important in the management of overexploited recreational fish stocks. Tag return studies, where the tag is removed regardless of fish disposition, have been used to assess the effectiveness of restoration efforts for these fisheries. We extend the instantaneous rate formulation of tag return models to allow for catch and release as well as harvest. The key point of our methods is that, given an estimate of the tag reporting rate, the fishing mortality rate (F) is separated into two components: the mortality on harvested fish and the \"mortality\" on tags (because the lags are removed) of fish released alive. The total fishing mortality rate for untagged fish is the sum of the Fs due to harvest and hooking mortality suffered by fish released alive. Natural mortality rates can also be estimated. Both age-independent models and age-dependent models are constructed, and the age-dependent models are illustrated by application to data from a study of striped bass Morone saxatilis in Chesapeake Bay from 1991 to 2003 by the Maryland Department of Natural Resources. By fitting models of the natural mortality rate with limited age and year dependence, we demonstrate an overall decrease in natural mortality rates as fish age and provide evidence of an increase in natural mortality beginning in the late 1990s, when an outbreak of the disease mycobacteriosis is thought to have begun. Our results indicate that fishing mortality is age dependent; selectivity increases up to age 6, when fish appear to be fully recruited to the fishery. There is also evidence of an increase in fishing mortality since 1995, when regulations were relaxed. ?? Copyright by the American Fisheries Society 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"North American Journal of Fisheries Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1577/M06-089.1","issn":"02755947","usgsCitation":"Jiang, H., Pollock, K.H., Brownie, C., Hoenig, J., Latour, R., Wells, B., and Hightower, J., 2007, Tag return models allowing for harvest and catch and release: Evidence of environmental and management impacts on striped bass fishing and natural mortality rates: North American Journal of Fisheries Management, v. 27, no. 2, p. 387-396, https://doi.org/10.1577/M06-089.1.","startPage":"387","endPage":"396","numberOfPages":"10","costCenters":[],"links":[{"id":212655,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/M06-089.1"},{"id":240176,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-05-01","publicationStatus":"PW","scienceBaseUri":"505ba3b6e4b08c986b31fe38","contributors":{"authors":[{"text":"Jiang, H.","contributorId":83731,"corporation":false,"usgs":true,"family":"Jiang","given":"H.","affiliations":[],"preferred":false,"id":424510,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pollock, K. H.","contributorId":65184,"corporation":false,"usgs":false,"family":"Pollock","given":"K.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":424509,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Brownie, C.","contributorId":43463,"corporation":false,"usgs":true,"family":"Brownie","given":"C.","affiliations":[],"preferred":false,"id":424507,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hoenig, J.M.","contributorId":54007,"corporation":false,"usgs":true,"family":"Hoenig","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":424508,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Latour, R.J.","contributorId":10620,"corporation":false,"usgs":true,"family":"Latour","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":424505,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Wells, B.K.","contributorId":91303,"corporation":false,"usgs":true,"family":"Wells","given":"B.K.","email":"","affiliations":[],"preferred":false,"id":424511,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Hightower, J.E.","contributorId":16605,"corporation":false,"usgs":true,"family":"Hightower","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":424506,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70161144,"text":"70161144 - 2007 - Exploring the temporal effects of seasonal water availability on the snail kite of Florida: Part III","interactions":[],"lastModifiedDate":"2016-06-28T16:14:20","indexId":"70161144","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Exploring the temporal effects of seasonal water availability on the snail kite of Florida: Part III","docAbstract":"<p><span>The Florida snail kite (</span><i class=\"EmphasisTypeItalic \">Rostrhamus sociabilis</i><span>) is an endangered raptor that occurs as an isolated population, currently of about 2,000 birds, in the wetlands of southern and central Florida, USA. Its exclusive prey species, the apple snail (</span><i class=\"EmphasisTypeItalic \">Pomacea paludosa</i><span>) is strongly influenced by seasonal changes in water abundance. Droughts during the snail kite breeding season have a direct negative effect on snail kite survival and reproduction, but droughts are also needed to maintain aquatic vegetation types favorable to snail kite foraging for snails. We used a spatially explicit matrix model to explore the effects of temporal variation in water levels on the viability of the snail kite population under different temporal drought regimes in its wetland breeding habitat. We focused on three aspects of variations in water levels that were likely to affect kites: (1) drought frequency; (2) drought duration; and (3) drought timing within the year. We modeled a 31-year historical scenario using four different scenarios in which the average water level was maintained constant, but the amplitude of water level fluctuations was modified. Our results reveal the complexity of the effects of temporal variation in water levels on snail kite population dynamics. Management implications of these results are discussed. In particular, management decisions should not be based on annual mean water levels alone, but must consider the intra-annual variability.</span></p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Temporal dimensions of landscape ecology: Wildlife responses to variable resources","largerWorkSubtype":{"id":15,"text":"Monograph"},"language":"English","publisher":"Springer","doi":"10.1007/978-0-387-45447-4_10","usgsCitation":"Mooij, W.M., Martin, J., Kitchens, W.M., and DeAngelis, D., 2007, Exploring the temporal effects of seasonal water availability on the snail kite of Florida: Part III, chap. <i>of</i> Temporal dimensions of landscape ecology: Wildlife responses to variable resources, p. 155-173, https://doi.org/10.1007/978-0-387-45447-4_10.","productDescription":"19 p.","startPage":"155","endPage":"173","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":566,"text":"Southeast Ecological Science 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kitchensw@usgs.gov","contributorId":2851,"corporation":false,"usgs":true,"family":"Kitchens","given":"Wiley","email":"kitchensw@usgs.gov","middleInitial":"M.","affiliations":[],"preferred":true,"id":584921,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"DeAngelis, Donald L. 0000-0002-1570-4057 don_deangelis@usgs.gov","orcid":"https://orcid.org/0000-0002-1570-4057","contributorId":127811,"corporation":false,"usgs":true,"family":"DeAngelis","given":"Donald L.","email":"don_deangelis@usgs.gov","affiliations":[{"id":566,"text":"Southeast Ecological Science Center","active":true,"usgs":true}],"preferred":false,"id":584922,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031117,"text":"70031117 - 2007 - Scaling field data to calibrate and validate moderate spatial resolution remote sensing models","interactions":[],"lastModifiedDate":"2023-02-10T17:47:39.643565","indexId":"70031117","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3052,"text":"Photogrammetric Engineering and Remote Sensing","active":true,"publicationSubtype":{"id":10}},"title":"Scaling field data to calibrate and validate moderate spatial resolution remote sensing models","docAbstract":"<p>Validation and calibration are essential components of nearly all remote sensing-based studies. In both cases, ground measurements are collected and then related to the remote sensing observations or model results. In many situations, and particularly in studies that use moderate resolution remote sensing, a mismatch exists between the sensor’s field of view and the scale at which in situ measurements are collected. The use of in situ measurements for model calibration and validation, therefore, requires a robust and defensible method to spatially aggregate ground measurements to the scale at which the remotely sensed data are acquired. This paper examines this challenge and specifically considers two different approaches for aggregating field measurements to match the spatial resolution of moderate spatial resolution remote sensing data: (a) landscape stratification; and (b) averaging of fine spatial resolution maps. The results show that an empirically estimated stratification based on a regression tree method provides a statistically defensible and operational basis for performing this type of procedure.</p>","language":"English","publisher":"ASPRS","doi":"10.14358/PERS.73.8.945","usgsCitation":"Baccini, A., Friedl, M.A., Woodcock, C.E., and Zhu, Z., 2007, Scaling field data to calibrate and validate moderate spatial resolution remote sensing models: Photogrammetric Engineering and Remote Sensing, v. 73, no. 8, p. 945-954, https://doi.org/10.14358/PERS.73.8.945.","productDescription":"10 p.","startPage":"945","endPage":"954","numberOfPages":"10","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":477131,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.14358/pers.73.8.945","text":"Publisher Index Page"},{"id":239011,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"73","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8713e4b08c986b3162cc","contributors":{"authors":[{"text":"Baccini, A.","contributorId":32349,"corporation":false,"usgs":true,"family":"Baccini","given":"A.","email":"","affiliations":[],"preferred":false,"id":430102,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Friedl, M. A.","contributorId":18174,"corporation":false,"usgs":false,"family":"Friedl","given":"M.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":430101,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Woodcock, C. E.","contributorId":93696,"corporation":false,"usgs":false,"family":"Woodcock","given":"C.","email":"","middleInitial":"E.","affiliations":[{"id":13570,"text":"Boston University","active":true,"usgs":false}],"preferred":false,"id":430103,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Zhu, Z.","contributorId":10898,"corporation":false,"usgs":true,"family":"Zhu","given":"Z.","email":"","affiliations":[],"preferred":false,"id":430100,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70033189,"text":"70033189 - 2007 - Fish assemblages of the upper Little Sioux River basin, Iowa, USA: Relationships with stream size and comparison with historical assemblages","interactions":[],"lastModifiedDate":"2021-06-02T18:40:16.907538","indexId":"70033189","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2299,"text":"Journal of Freshwater Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Fish assemblages of the upper Little Sioux River basin, Iowa, USA: Relationships with stream size and comparison with historical assemblages","docAbstract":"We characterized the fish assemblages in second to fifth order streams of the upper Little Sioux River basin in northwest Iowa, USA and compared our results with historical surveys. The fish assemblage consisted of over twenty species, was dominated numerically by creek chub, sand shiner, central stoneroller and other cyprinids, and was dominated in biomass by common carp. Most of the species and the great majority of all individuals present were at least moderately tolerant to environmental degradation, and biotic integrity at most sites was characterized as fair. Biotic integrity declined with increasing stream size, and degraded habitat in larger streams is a possible cause. No significant changes in species richness or the relative distribution of species' tolerance appear to have occurred since the 1930s.","language":"English","publisher":"Taylor & Francis Online","doi":"10.1080/02705060.2007.9664147","usgsCitation":"Palic, D., Helland, L., Pedersen, B., Pribil, J., Grajeda, R., Loan-Wilsey, A., and Pierce, C., 2007, Fish assemblages of the upper Little Sioux River basin, Iowa, USA: Relationships with stream size and comparison with historical assemblages: Journal of Freshwater Ecology, v. 22, no. 1, p. 69-79, https://doi.org/10.1080/02705060.2007.9664147.","productDescription":"11 p.","startPage":"69","endPage":"79","costCenters":[{"id":350,"text":"Iowa Cooperative Fish and Wildlife Research Unit","active":false,"usgs":true}],"links":[{"id":477200,"rank":1,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1111&amp;amp;context=nrem_pubs","text":"External Repository"},{"id":240787,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Iowa","otherGeospatial":"Little Sioux River basin","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -96.448974609375,\n              41.75492216766298\n            ],\n            [\n              -93.69140625,\n              41.75492216766298\n            ],\n            [\n              -93.69140624999997,\n              43.50872101129682\n            ],\n            [\n              -96.734619140625,\n              43.50872101129684\n            ],\n            [\n              -96.448974609375,\n              41.75492216766298\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"22","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a107fe4b0c8380cd53ccf","contributors":{"authors":[{"text":"Palic, D.","contributorId":101882,"corporation":false,"usgs":true,"family":"Palic","given":"D.","email":"","affiliations":[],"preferred":false,"id":439756,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Helland, L.","contributorId":82534,"corporation":false,"usgs":true,"family":"Helland","given":"L.","email":"","affiliations":[],"preferred":false,"id":439753,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Pedersen, B.R.","contributorId":76141,"corporation":false,"usgs":true,"family":"Pedersen","given":"B.R.","email":"","affiliations":[],"preferred":false,"id":439752,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Pribil, J.R.","contributorId":90542,"corporation":false,"usgs":true,"family":"Pribil","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":439754,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Grajeda, R.M.","contributorId":51546,"corporation":false,"usgs":true,"family":"Grajeda","given":"R.M.","email":"","affiliations":[],"preferred":false,"id":439750,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Loan-Wilsey, Anna","contributorId":59636,"corporation":false,"usgs":true,"family":"Loan-Wilsey","given":"Anna","email":"","affiliations":[],"preferred":false,"id":439751,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Pierce, C.L. 0000-0001-5088-5431","orcid":"https://orcid.org/0000-0001-5088-5431","contributorId":93606,"corporation":false,"usgs":true,"family":"Pierce","given":"C.L.","affiliations":[],"preferred":false,"id":439755,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70033124,"text":"70033124 - 2007 - Evaluation and comparison of gross primary production estimates for the Northern Great Plains grasslands","interactions":[],"lastModifiedDate":"2018-02-21T15:40:52","indexId":"70033124","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":"Evaluation and comparison of gross primary production estimates for the Northern Great Plains grasslands","docAbstract":"<p id=\"\">Two spatially-explicit estimates of gross primary production (GPP) are available for the Northern Great Plains. An empirical piecewise regression (PWR) GPP model was developed from flux tower measurements to map carbon flux across the region. The Moderate Resolution Imaging Spectrometer (MODIS) GPP model is a process-based model that uses flux tower data to calibrate its parameters. Verification and comparison of the regional PWR GPP and the global MODIS GPP are important for the modeling of grassland carbon flux. This study compared GPP estimates from PWR and MODIS models with five towers in the grasslands. Among them, PWR GPP and MODIS GPP showed a good agreement with tower-based GPP at three towers. The global MODIS GPP, however, did not agree well with tower-based GPP at two other towers, probably because of the insensitivity of MODIS model to regional ecosystem and climate change and extreme soil moisture conditions. Cross-validation indicated that the PWR model is relatively robust for predicting regional grassland GPP. However, the PWR model should include a wide variety of flux tower data as the training data sets to obtain more accurate results.</p><p id=\"\">In addition, GPP maps based on the PWR and MODIS models were compared for the entire region. In the northwest and south, PWR GPP was much higher than MODIS GPP. These areas were characterized by the higher water holding capacity with a lower proportion of C<sub>4</sub> grasses in the northwest and a higher proportion of C<sub>4</sub> grasses in the south. In the central and southeastern regions, PWR GPP was much lower than MODIS GPP under complicated conditions with generally mixed C<sub>3</sub>/C<sub>4</sub> grasses. The analysis indicated that the global MODIS GPP model has some limitations on detecting moisture stress, which may have been caused by the facts that C<sub>3</sub> and C<sub>4</sub> grasses are not distinguished, water stress is driven by vapor pressure deficit (VPD) from coarse meteorological data, and MODIS land cover data are unable to differentiate the sub-pixel cropland components.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.rse.2006.08.012","issn":"00344257","usgsCitation":"Zhang, L., Wylie, B.K., Loveland, T.R., Fosnight, E.A., Tieszen, L.L., Ji, L., and Gilmanov, T., 2007, Evaluation and comparison of gross primary production estimates for the Northern Great Plains grasslands: Remote Sensing of Environment, v. 106, no. 2, p. 173-189, https://doi.org/10.1016/j.rse.2006.08.012.","productDescription":"17 p.","startPage":"173","endPage":"189","numberOfPages":"17","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":240817,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213213,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.rse.2006.08.012"}],"volume":"106","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0c05e4b0c8380cd529d7","contributors":{"authors":[{"text":"Zhang, Li","contributorId":98139,"corporation":false,"usgs":true,"family":"Zhang","given":"Li","affiliations":[],"preferred":false,"id":439467,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wylie, Bruce K. 0000-0002-7374-1083 wylie@usgs.gov","orcid":"https://orcid.org/0000-0002-7374-1083","contributorId":750,"corporation":false,"usgs":true,"family":"Wylie","given":"Bruce","email":"wylie@usgs.gov","middleInitial":"K.","affiliations":[{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true},{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"preferred":true,"id":439469,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Loveland, Thomas R. 0000-0003-3114-6646 loveland@usgs.gov","orcid":"https://orcid.org/0000-0003-3114-6646","contributorId":140256,"corporation":false,"usgs":true,"family":"Loveland","given":"Thomas","email":"loveland@usgs.gov","middleInitial":"R.","affiliations":[{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true}],"preferred":false,"id":439471,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Fosnight, Eugene A. 0000-0002-8557-3697 fosnight@usgs.gov","orcid":"https://orcid.org/0000-0002-8557-3697","contributorId":2961,"corporation":false,"usgs":true,"family":"Fosnight","given":"Eugene","email":"fosnight@usgs.gov","middleInitial":"A.","affiliations":[{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true}],"preferred":true,"id":439468,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Tieszen, Larry L. tieszen@usgs.gov","contributorId":2831,"corporation":false,"usgs":true,"family":"Tieszen","given":"Larry","email":"tieszen@usgs.gov","middleInitial":"L.","affiliations":[],"preferred":true,"id":439466,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Ji, Lei 0000-0002-6133-1036 lji@usgs.gov","orcid":"https://orcid.org/0000-0002-6133-1036","contributorId":2832,"corporation":false,"usgs":true,"family":"Ji","given":"Lei","email":"lji@usgs.gov","affiliations":[{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true}],"preferred":false,"id":439472,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Gilmanov, Tagir","contributorId":6351,"corporation":false,"usgs":true,"family":"Gilmanov","given":"Tagir","affiliations":[],"preferred":false,"id":439470,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70033122,"text":"70033122 - 2007 - A field test of the centrifugal community organization model using psammophilic gerbils in Israel's southern coastal plain","interactions":[],"lastModifiedDate":"2012-03-12T17:21:34","indexId":"70033122","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1604,"text":"Evolutionary Ecology Research","active":true,"publicationSubtype":{"id":10}},"title":"A field test of the centrifugal community organization model using psammophilic gerbils in Israel's southern coastal plain","docAbstract":"Background: An optimal habitat selection model called centrifugal community organization (CCO) predicts that species, although they have the same primary habitat, may co-exist owing to their ability to use different secondary habitats. Goal: Test the predictions of CCO with field experiments. Species: The Egyptian sand gerbil (40 g), Gerbillus pyramidum, and Allenby's gerbil (25 g), G. andersoni allenbyi. Site: Ashdod sand dunes in the southern coastal plain of Israel. Three sandy habitats are present: shifting, semi-stabilized, and stabilized sand. Gerbils occupied all three habitats. Methods: We surveyed rodent abundance, activity levels, and foraging behaviour while experimentally removing G. pyramidum. Results: Three predictions of the CCO model were supported. Both species did best in the semi-stabilized habitat. However, they differed in their secondary habitats. Gerbillus pyramidum preferred the shifting sand habitat, whereas G. a. allenbyi preferred the stabilized habitat. Habitat selection by both species depended on density. However, in contrast to CCO, G. pyramidum dominated the core habitat and excluded G. a. allenbyi. We term this variant of CCO, 'asymmetric CCO'. Conclusions: The fundamental feature of CCO appears valid: co-existence may result not because of what each competing species does best, but because of what they do as a back-up. But in contrast to the prediction of the original CCO model, all dynamic traces of interaction can vanish if the system includes interference competition. ?? 2007 Gideon Wasserberg.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Evolutionary Ecology Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"15220613","usgsCitation":"Wasserberg, G., Kotler, B., Morris, D., and Abramsky, Z., 2007, A field test of the centrifugal community organization model using psammophilic gerbils in Israel's southern coastal plain: Evolutionary Ecology Research, v. 9, no. 2, p. 299-311.","startPage":"299","endPage":"311","numberOfPages":"13","costCenters":[],"links":[{"id":240783,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"9","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e3d7e4b0c8380cd46256","contributors":{"authors":[{"text":"Wasserberg, Gideon","contributorId":31185,"corporation":false,"usgs":true,"family":"Wasserberg","given":"Gideon","email":"","affiliations":[],"preferred":false,"id":439461,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kotler, B.P.","contributorId":33908,"corporation":false,"usgs":true,"family":"Kotler","given":"B.P.","affiliations":[],"preferred":false,"id":439462,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Morris, D.W.","contributorId":94078,"corporation":false,"usgs":true,"family":"Morris","given":"D.W.","email":"","affiliations":[],"preferred":false,"id":439464,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Abramsky, Z.","contributorId":88928,"corporation":false,"usgs":true,"family":"Abramsky","given":"Z.","email":"","affiliations":[],"preferred":false,"id":439463,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70033021,"text":"70033021 - 2007 - Multibeam observations of mine burial near Clearwater, FL, including comparisons to predictions of wave-induced burial","interactions":[],"lastModifiedDate":"2012-03-12T17:21:38","indexId":"70033021","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1941,"text":"IEEE Journal of Oceanic Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Multibeam observations of mine burial near Clearwater, FL, including comparisons to predictions of wave-induced burial","docAbstract":"A Kongsberg Simrad EM 3000 multibeam sonar (Kongsberg Simrad, Kongsberg, Norway) was used to conduct a set of six repeat high-resolution bathymetric surveys west of Indian Rocks Beach (IRB), just to the south of Clearwater, FL, between January and March 2003, to observe in situ scour and burial of instrumented inert mines and mine-like cylinders. Three closely located study sites were chosen: two fine-sand sites, a shallow one located in ??? 13 m of water depth and a deep site located in ???14 m of water depth; and a coarse-sand site in ???13 m. Results from these surveys indicate that mines deployed in fine sand are nearly buried within two months of deployment (i.e., they sunk 74.5% or more below the ambient seafloor depth). Mines deployed in coarse sand showed a lesser amount of scour, burying until they present roughly the same hydrodynamic roughness as the surrounding rippled bedforms. These data were also used to test the validity of the Virginia Institute of Marine Science (VIMS, Gloucester Point, VA) 2-D burial model. The model worked well in areas of fine sand, sufficiently predicting burial over the course of the experiment. In the area of coarse sand, the model greatly overpredicted the amount of burial. This is believed to be due to the presence of rippled bedforms around the mines, which affect local bottom morphodynamics and are not accounted for in the model, an issue currently being addressed by the modelers. This paper focuses specifically on two instrumented mines: an acoustic mine located in fine sand and an optical instrumented mine located in coarse sand. ?? 2007 IEEE.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"IEEE Journal of Oceanic Engineering","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1109/JOE.2006.889317","issn":"03649059","usgsCitation":"Wolfson, M., Naar, D., Howd, P., Locker, S., Donahue, B., Friedrichs, C.T., Trembanis, A., Richardson, M.D., and Wever, T., 2007, Multibeam observations of mine burial near Clearwater, FL, including comparisons to predictions of wave-induced burial: IEEE Journal of Oceanic Engineering, v. 32, no. 1, p. 103-118, https://doi.org/10.1109/JOE.2006.889317.","startPage":"103","endPage":"118","numberOfPages":"16","costCenters":[],"links":[{"id":213209,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1109/JOE.2006.889317"},{"id":240813,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"32","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5fd5e4b0c8380cd71176","contributors":{"authors":[{"text":"Wolfson, M.L.","contributorId":41657,"corporation":false,"usgs":true,"family":"Wolfson","given":"M.L.","email":"","affiliations":[],"preferred":false,"id":439000,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Naar, D. F.","contributorId":80434,"corporation":false,"usgs":true,"family":"Naar","given":"D. F.","affiliations":[],"preferred":false,"id":439003,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Howd, P.A.","contributorId":103793,"corporation":false,"usgs":true,"family":"Howd","given":"P.A.","email":"","affiliations":[],"preferred":false,"id":439006,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Locker, S. D.","contributorId":81532,"corporation":false,"usgs":true,"family":"Locker","given":"S. D.","affiliations":[],"preferred":false,"id":439004,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Donahue, B.T.","contributorId":12529,"corporation":false,"usgs":true,"family":"Donahue","given":"B.T.","email":"","affiliations":[],"preferred":false,"id":438999,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Friedrichs, Carl T.","contributorId":43989,"corporation":false,"usgs":false,"family":"Friedrichs","given":"Carl","email":"","middleInitial":"T.","affiliations":[{"id":6708,"text":"Virginia Institute of Marine Science","active":true,"usgs":false}],"preferred":false,"id":439001,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Trembanis, A.C.","contributorId":49611,"corporation":false,"usgs":true,"family":"Trembanis","given":"A.C.","affiliations":[],"preferred":false,"id":439002,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Richardson, M. D.","contributorId":88094,"corporation":false,"usgs":true,"family":"Richardson","given":"M.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":439005,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Wever, T.F.","contributorId":107104,"corporation":false,"usgs":true,"family":"Wever","given":"T.F.","email":"","affiliations":[],"preferred":false,"id":439007,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}}
,{"id":70033017,"text":"70033017 - 2007 - Spatial correlation of shear-wave velocity in the San Francisco Bay Area sediments","interactions":[],"lastModifiedDate":"2023-10-06T12:00:28.083895","indexId":"70033017","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3418,"text":"Soil Dynamics and Earthquake Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Spatial correlation of shear-wave velocity in the San Francisco Bay Area sediments","docAbstract":"<div id=\"abstracts\" class=\"Abstracts u-font-serif text-s\"><div id=\"aep-abstract-id14\" class=\"abstract author\"><div id=\"aep-abstract-sec-id15\"><p>Ground motions recorded within sedimentary basins are variable over short distances. One important cause of the variability is that local soil properties are variable at all scales. Regional hazard maps developed for predicting site effects are generally derived from maps of surficial geology; however, recent studies have shown that mapped geologic units do not correlate well with the average shear-wave velocity of the upper 30&nbsp;m,<span>&nbsp;</span><i>V</i><sub>s</sub>(30). We model the horizontal variability of near-surface soil shear-wave velocity in the San Francisco Bay Area to estimate values in unsampled locations in order to account for site effects in a continuous manner. Previous geostatistical studies of soil properties have shown horizontal correlations at the scale of meters to tens of meters while the vertical correlations are on the order of centimeters. In this paper we analyze shear-wave velocity data over regional distances and find that surface shear-wave velocity is correlated at horizontal distances up to 4&nbsp;km based on data from seismic cone penetration tests and the spectral analysis of surface waves. We propose a method to map site effects by using geostatistical methods based on the shear-wave velocity correlation structure within a sedimentary basin. If used in conjunction with densely spaced shear-wave velocity profiles in regions of high seismic risk, geostatistical methods can produce reliable continuous maps of site effects.</p></div></div></div><ul id=\"issue-navigation\" class=\"issue-navigation u-margin-s-bottom u-bg-grey1\"></ul>","language":"English","publisher":"Elsevier","doi":"10.1016/j.soildyn.2006.05.004","issn":"02677261","usgsCitation":"Thompson, E., Baise, L., and Kayen, R.E., 2007, Spatial correlation of shear-wave velocity in the San Francisco Bay Area sediments: Soil Dynamics and Earthquake Engineering, v. 27, no. 2, p. 144-152, https://doi.org/10.1016/j.soildyn.2006.05.004.","productDescription":"9 p.","startPage":"144","endPage":"152","numberOfPages":"9","costCenters":[],"links":[{"id":477160,"rank":2,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://escholarship.org/uc/item/25h1p1mj","text":"External Repository"},{"id":240776,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"San Francisco Bay Area","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -123.1020910832355,\n              38.44037571997805\n            ],\n            [\n              -123.1020910832355,\n              37.234390374321876\n            ],\n            [\n              -121.32230592698542,\n              37.234390374321876\n            ],\n            [\n              -121.32230592698542,\n              38.44037571997805\n            ],\n            [\n              -123.1020910832355,\n              38.44037571997805\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"27","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9460e4b08c986b31aa3f","contributors":{"authors":[{"text":"Thompson, E.M.","contributorId":104688,"corporation":false,"usgs":true,"family":"Thompson","given":"E.M.","affiliations":[],"preferred":false,"id":438993,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Baise, L.G.","contributorId":6239,"corporation":false,"usgs":true,"family":"Baise","given":"L.G.","affiliations":[],"preferred":false,"id":438991,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kayen, R. E.","contributorId":14424,"corporation":false,"usgs":true,"family":"Kayen","given":"R.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":438992,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70033014,"text":"70033014 - 2007 - Vertical spatial sensitivity and exploration depth of low-induction-number electromagnetic-induction instruments","interactions":[],"lastModifiedDate":"2018-04-02T15:24:51","indexId":"70033014","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3674,"text":"Vadose Zone Journal","active":true,"publicationSubtype":{"id":10}},"title":"Vertical spatial sensitivity and exploration depth of low-induction-number electromagnetic-induction instruments","docAbstract":"Vertical spatial sensitivity and effective depth of exploration (d e) of low-induction-number (LIN) instruments over a layered soil were evaluated using a complete numerical solution to Maxwell's equations. Previous studies using approximate mathematical solutions predicted a vertical spatial sensitivity for instruments operating under LIN conditions that, for a given transmitter-receiver coil separation (s), coil orientation, and transmitter frequency, should depend solely on depth below the land surface. When not operating under LIN conditions, vertical spatial sensitivity and de also depend on apparent soil electrical conductivity (??a) and therefore the induction number (??). In this new evaluation, we determined the range of ??a and ?? values for which the LIN conditions hold and how de changes when they do not. Two-layer soil models were simulated with both horizontal (HCP) and vertical (VCP) coplanar coil orientations. Soil layers were given electrical conductivity values ranging from 0.1 to 200 mS m-1. As expected, de decreased as ??a increased. Only the least electrically conductive soil produced the de expected when operating under LIN conditions. For the VCP orientation, this was 1.6s, decreasing to 0.8s in the most electrically conductive soil. For the HCP orientation, de decreased from 0.76s to 0.51s. Differences between this and previous studies are attributed to inadequate representation of skin-depth effect and scattering at interfaces between layers. When using LIN instruments to identify depth to water tables, interfaces between soil layers, and variations in salt or moisture content, it is important to consider the dependence of de on ??a. ?? Soil Science Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Vadose Zone Journal","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2136/vzj2006.0120","issn":"15391663","usgsCitation":"Callegary, J., Ferre, T., and Groom, R., 2007, Vertical spatial sensitivity and exploration depth of low-induction-number electromagnetic-induction instruments: Vadose Zone Journal, v. 6, no. 1, p. 158-167, https://doi.org/10.2136/vzj2006.0120.","startPage":"158","endPage":"167","numberOfPages":"10","costCenters":[],"links":[{"id":476982,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.503.2650","text":"External Repository"},{"id":240711,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213118,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2136/vzj2006.0120"}],"volume":"6","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc242e4b08c986b32aa15","contributors":{"authors":[{"text":"Callegary, J.B.","contributorId":71769,"corporation":false,"usgs":true,"family":"Callegary","given":"J.B.","affiliations":[],"preferred":false,"id":438977,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ferre, T.P.A.","contributorId":196167,"corporation":false,"usgs":false,"family":"Ferre","given":"T.P.A.","email":"","affiliations":[],"preferred":false,"id":438975,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Groom, R.W.","contributorId":59634,"corporation":false,"usgs":true,"family":"Groom","given":"R.W.","email":"","affiliations":[],"preferred":false,"id":438976,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031127,"text":"70031127 - 2007 - A new ghost-node method for linking different models and initial investigations of heterogeneity and nonmatching grids","interactions":[],"lastModifiedDate":"2018-09-13T16:25:25","indexId":"70031127","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":664,"text":"Advances in Water Resources","active":true,"publicationSubtype":{"id":10}},"title":"A new ghost-node method for linking different models and initial investigations of heterogeneity and nonmatching grids","docAbstract":"A flexible, robust method for linking parent (regional-scale) and child (local-scale) grids of locally refined models that use different numerical methods is developed based on a new, iterative ghost-node method. Tests are presented for two-dimensional and three-dimensional pumped systems that are homogeneous or that have simple heterogeneity. The parent and child grids are simulated using the block-centered finite-difference MODFLOW and control-volume finite-element FEHM models, respectively. The models are solved iteratively through head-dependent (child model) and specified-flow (parent model) boundary conditions. Boundary conditions for models with nonmatching grids or zones of different hydraulic conductivity are derived and tested against heads and flows from analytical or globally-refined models. Results indicate that for homogeneous two- and three-dimensional models with matched grids (integer number of child cells per parent cell), the new method is nearly as accurate as the coupling of two MODFLOW models using the shared-node method and, surprisingly, errors are slightly lower for nonmatching grids (noninteger number of child cells per parent cell). For heterogeneous three-dimensional systems, this paper compares two methods for each of the two sets of boundary conditions: external heads at head-dependent boundary conditions for the child model are calculated using bilinear interpolation or a Darcy-weighted interpolation; specified-flow boundary conditions for the parent model are calculated using model-grid or hydrogeologic-unit hydraulic conductivities. Results suggest that significantly more accurate heads and flows are produced when both Darcy-weighted interpolation and hydrogeologic-unit hydraulic conductivities are used, while the other methods produce larger errors at the boundary between the regional and local models. The tests suggest that, if posed correctly, the ghost-node method performs well. Additional testing is needed for highly heterogeneous systems. ?? 2007 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Advances in Water Resources","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.advwatres.2007.01.004","issn":"03091708","usgsCitation":"Dickinson, J., James, S., Mehl, S., Hill, M.C., Leake, S.A., Zyvoloski, G., Faunt, C., and Eddebbarh, A., 2007, A new ghost-node method for linking different models and initial investigations of heterogeneity and nonmatching grids: Advances in Water Resources, v. 30, no. 8, p. 1722-1736, https://doi.org/10.1016/j.advwatres.2007.01.004.","startPage":"1722","endPage":"1736","numberOfPages":"15","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":238616,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211342,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.advwatres.2007.01.004"}],"volume":"30","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e4a2e4b0c8380cd467b5","contributors":{"authors":[{"text":"Dickinson, J.E.","contributorId":28790,"corporation":false,"usgs":true,"family":"Dickinson","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":430156,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"James, S.C.","contributorId":103059,"corporation":false,"usgs":true,"family":"James","given":"S.C.","email":"","affiliations":[],"preferred":false,"id":430160,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mehl, S.","contributorId":20114,"corporation":false,"usgs":true,"family":"Mehl","given":"S.","affiliations":[],"preferred":false,"id":430154,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hill, M. C.","contributorId":48993,"corporation":false,"usgs":true,"family":"Hill","given":"M.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":430157,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Leake, S. A.","contributorId":52164,"corporation":false,"usgs":true,"family":"Leake","given":"S.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":430158,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Zyvoloski, G.A.","contributorId":20123,"corporation":false,"usgs":true,"family":"Zyvoloski","given":"G.A.","email":"","affiliations":[],"preferred":false,"id":430155,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Faunt, C.C. 0000-0001-5659-7529","orcid":"https://orcid.org/0000-0001-5659-7529","contributorId":103314,"corporation":false,"usgs":true,"family":"Faunt","given":"C.C.","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":430161,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Eddebbarh, A.-A.","contributorId":101425,"corporation":false,"usgs":true,"family":"Eddebbarh","given":"A.-A.","email":"","affiliations":[],"preferred":false,"id":430159,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70031132,"text":"70031132 - 2007 - Optimal use of resources structures home ranges and spatial distribution of black bears","interactions":[],"lastModifiedDate":"2012-03-12T17:21:17","indexId":"70031132","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":770,"text":"Animal Behaviour","active":true,"publicationSubtype":{"id":10}},"title":"Optimal use of resources structures home ranges and spatial distribution of black bears","docAbstract":"Research has shown that territories of animals are economical. Home ranges should be similarly efficient with respect to spatially distributed resources and this should structure their distribution on a landscape, although neither has been demonstrated empirically. To test these hypotheses, we used home range models that optimize resource use according to resource-maximizing and area-minimizing strategies to evaluate the home ranges of female black bears, Ursus americanus, living in the southern Appalachian Mountains. We tested general predictions of our models using 104 home ranges of adult female bears studied in the Pisgah Bear Sanctuary, North Carolina, U.S.A., from 1981 to 2001. We also used our models to estimate home ranges for each real home range under a variety of strategies and constraints and compared similarity of simulated to real home ranges. We found that home ranges of female bears were efficient with respect to the spatial distribution of resources and were best explained by an area-minimizing strategy with moderate resource thresholds and low levels of resource depression. Although resource depression probably influenced the spatial distribution of home ranges on the landscape, levels of resource depression were too low to quantify accurately. Home ranges of lactating females had higher resource thresholds and were more susceptible to resource depression than those of breeding females. We conclude that home ranges of animals, like territories, are economical with respect to resources, and that resource depression may be the mechanism behind ideal free or ideal preemptive distributions on complex, heterogeneous landscapes. ?? 2007 The Association for the Study of Animal Behaviour.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Animal Behaviour","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.anbehav.2006.11.017","issn":"00033472","usgsCitation":"Mitchell, M., and Powell, R.A., 2007, Optimal use of resources structures home ranges and spatial distribution of black bears: Animal Behaviour, v. 74, no. 2, p. 219-230, https://doi.org/10.1016/j.anbehav.2006.11.017.","startPage":"219","endPage":"230","numberOfPages":"12","costCenters":[],"links":[{"id":211400,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.anbehav.2006.11.017"},{"id":238683,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"74","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6eede4b0c8380cd75886","contributors":{"authors":[{"text":"Mitchell, M.S.","contributorId":26724,"corporation":false,"usgs":true,"family":"Mitchell","given":"M.S.","email":"","affiliations":[],"preferred":false,"id":430178,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Powell, R. A.","contributorId":41789,"corporation":false,"usgs":true,"family":"Powell","given":"R.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":430179,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70032923,"text":"70032923 - 2007 - Ecological linkages between headwaters and downstream ecosystems: Transport of organic matter, invertebrates, and wood down headwater channels","interactions":[],"lastModifiedDate":"2012-03-12T17:21:37","indexId":"70032923","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2529,"text":"Journal of the American Water Resources Association","active":true,"publicationSubtype":{"id":10}},"title":"Ecological linkages between headwaters and downstream ecosystems: Transport of organic matter, invertebrates, and wood down headwater channels","docAbstract":"Headwater streams make up a large proportion of the total length and watershed area of fluvial networks, and are partially characterized by the large volume of organic matter (large wood, detritus, and dissolved organic matter) and invertebrate inputs from the riparian forest, relative to stream size. Much of those inputs are exported to downstream reaches through time where they potentially subsidize river communities. The relative rates, timing, and conversion processes that carry inputs from small streams to downstream reaches are reasonably well quantified. For example, larger particles are converted to smaller particles, which are more easily exported. Also, dissolved organic matter and surface biofilms are converted to larger particles which can be more easily intercepted by consumers. However, the quality of these materials as it affects biological activity downstream is not well known, nor is the extent to which timing permits biological use of those particles. These ecological unknowns need to be resolved. Further, land uses may disrupt and diminish material transport to downstream reaches by removing sources (e.g., forest harvest), by affecting transport and decomposition processes (e.g., flow regulation, irrigation, changes in biotic communities), and by altering mechanisms of storage within headwaters (e.g., channelization). We present conceptual models of energy and nutrient fluxes that outline small stream processes and pathways important to downstream communities, and we identify informational gaps that, if filled, could significantly advance the understanding of linkages between headwater streams and larger rivers. The models, based on empirical evidence and best professional judgment, suggest that navigable waters are significantly influenced by headwater streams through hydrological and ecological connectivities, and land use can dramatically influence these natural connectivities, impacting downstream riverine ecosystems. ?? 2007 American Water Resources Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of the American Water Resources Association","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1752-1688.2007.00007.x","issn":"1093474X","usgsCitation":"Wipfli, M., Richardson, J., and Naiman, R., 2007, Ecological linkages between headwaters and downstream ecosystems: Transport of organic matter, invertebrates, and wood down headwater channels: Journal of the American Water Resources Association, v. 43, no. 1, p. 72-85, https://doi.org/10.1111/j.1752-1688.2007.00007.x.","startPage":"72","endPage":"85","numberOfPages":"14","costCenters":[],"links":[{"id":213232,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1752-1688.2007.00007.x"},{"id":240837,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"43","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-01-26","publicationStatus":"PW","scienceBaseUri":"505a0558e4b0c8380cd50d78","contributors":{"authors":[{"text":"Wipfli, M.S.","contributorId":51963,"corporation":false,"usgs":true,"family":"Wipfli","given":"M.S.","email":"","affiliations":[],"preferred":false,"id":438540,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Richardson, J.S.","contributorId":80642,"corporation":false,"usgs":true,"family":"Richardson","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":438541,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Naiman, R.J.","contributorId":14354,"corporation":false,"usgs":true,"family":"Naiman","given":"R.J.","email":"","affiliations":[],"preferred":false,"id":438539,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70032922,"text":"70032922 - 2007 - Evaluation of the status of anurans on a refuge in suburban Maryland","interactions":[],"lastModifiedDate":"2012-03-12T17:21:37","indexId":"70032922","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2334,"text":"Journal of Herpetology","active":true,"publicationSubtype":{"id":10}},"title":"Evaluation of the status of anurans on a refuge in suburban Maryland","docAbstract":"Because many anurans have well-defined breeding seasons and male anurans produce loud advertisement calls, surveys of these breeding choruses are believed to provide a dependable means of monitoring population trends. The Patuxent Research Refuge initiated such a calling survey in the spring of 1997, which uses volunteers to collect anuran (frog and toad) calling survey data. The primary goal of initiating the calling surveys at the Patuxent Refuge was to obtain baseline information on anuran populations, such as species occurrence, frequency of occurrence, and relative abundance over time. In this paper, we used the calling survey data to develop models for the \"proportion of area occupied\" by individual anuran species, a method in which analysis is focused on the proportion of sites that are occupied by a species, instead of the number of individuals present in the population. This type of analysis is ideal for use in large-scale monitoring programs focused on species that are difficult to count, such as anurans or birds. We considered models for proportion of area occupied that allow for imperfect detection (that is, a species may be present but go undetected during sampling) by incorporating parameters that describe detection probability and the response of detection probability to various environmental and sampling covariates. Our results indicate that anuran populations on the Patuxent Research Refuge have high rates of occupancy compared to areas nearby and that extinction and colonization rates are stable. The potential uses for \"proportion of area occupied\" analyses are far-reaching and will allow for more accurate quantification of data and better-informed management decisions for calling surveys on a larger scale. Copyright 2007 Society for the Study of Amphibians and Reptiles.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Herpetology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1670/0022-1511(2007)41[52:EOTSOA]2.0.CO;2","issn":"00221511","usgsCitation":"Brander, S., Royle, J., and Eames, M., 2007, Evaluation of the status of anurans on a refuge in suburban Maryland: Journal of Herpetology, v. 41, no. 1, p. 52-60, https://doi.org/10.1670/0022-1511(2007)41[52:EOTSOA]2.0.CO;2.","startPage":"52","endPage":"60","numberOfPages":"9","costCenters":[],"links":[{"id":213231,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1670/0022-1511(2007)41[52:EOTSOA]2.0.CO;2"},{"id":240836,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"41","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0cf4e4b0c8380cd52d71","contributors":{"authors":[{"text":"Brander, S.M.","contributorId":45431,"corporation":false,"usgs":true,"family":"Brander","given":"S.M.","email":"","affiliations":[],"preferred":false,"id":438536,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Royle, J. Andrew 0000-0003-3135-2167","orcid":"https://orcid.org/0000-0003-3135-2167","contributorId":96221,"corporation":false,"usgs":true,"family":"Royle","given":"J. Andrew","affiliations":[],"preferred":false,"id":438538,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Eames, M.","contributorId":70094,"corporation":false,"usgs":true,"family":"Eames","given":"M.","email":"","affiliations":[],"preferred":false,"id":438537,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70032902,"text":"70032902 - 2007 - Effects of sea-level rise on ground water flow in a coastal aquifer system","interactions":[],"lastModifiedDate":"2012-03-12T17:21:36","indexId":"70032902","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":"Effects of sea-level rise on ground water flow in a coastal aquifer system","docAbstract":"The effects of sea-level rise on the depth to the fresh water/salt water interface were simulated by using a density-dependent, three-dimensional numerical ground water flow model for a simplified hypothetical fresh water lens that is similar to shallow, coastal aquifers found along the Atlantic coast of the United States. Simulations of sea-level rise of 2.65 mm/year from 1929 to 2050 resulted in an increase in water levels relative to a fixed datum, yet a net decrease in water levels relative to the increased sea-level position. The net decrease in water levels was much greater near a gaining stream than farther from the stream. The difference in the change in water levels is attributed to the dampening effect of the stream on water level changes in response to sea-level rise. In response to the decreased water level altitudes relative to local sea level, the depth to the fresh water/salt water interface decreased. This reduction in the thickness of the fresh water lens varied throughout the aquifer and was greatly affected by proximity to a ground water fed stream and whether the stream was tidally influenced. Away from the stream, the thickness of the fresh water lens decreased by about 2% from 1929 to 2050, whereas the fresh water lens thickness decreased by about 22% to 31% for the same period near the stream, depending on whether the stream was tidally influenced. The difference in the change in the fresh water/salt water interface position is controlled by the difference in the net decline in water levels relative to local sea level. ?? 2007 National Ground Water Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1745-6584.2006.00279.x","issn":"0017467X","usgsCitation":"Masterson, J., and Garabedian, S., 2007, Effects of sea-level rise on ground water flow in a coastal aquifer system: Ground Water, v. 45, no. 2, p. 209-217, https://doi.org/10.1111/j.1745-6584.2006.00279.x.","startPage":"209","endPage":"217","numberOfPages":"9","costCenters":[],"links":[{"id":213410,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6584.2006.00279.x"},{"id":241034,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-01-29","publicationStatus":"PW","scienceBaseUri":"505a07c0e4b0c8380cd517f7","contributors":{"authors":[{"text":"Masterson, John P. 0000-0003-3202-4413","orcid":"https://orcid.org/0000-0003-3202-4413","contributorId":102516,"corporation":false,"usgs":true,"family":"Masterson","given":"John P.","affiliations":[{"id":466,"text":"New England Water Science Center","active":true,"usgs":true}],"preferred":false,"id":438446,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Garabedian, S. P.","contributorId":56657,"corporation":false,"usgs":true,"family":"Garabedian","given":"S. P.","affiliations":[],"preferred":false,"id":438445,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031256,"text":"70031256 - 2007 - On the choice of statistical models for estimating occurrence and extinction from animal surveys","interactions":[],"lastModifiedDate":"2012-03-12T17:21:19","indexId":"70031256","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1465,"text":"Ecology","active":true,"publicationSubtype":{"id":10}},"title":"On the choice of statistical models for estimating occurrence and extinction from animal surveys","docAbstract":"In surveys of natural animal populations the number of animals that are present and available to be detected at a sample location is often low, resulting in few or no detections. Low detection frequencies are especially common in surveys of imperiled species; however, the choice of sampling method and protocol also may influence the size of the population that is vulnerable to detection. In these circumstances, probabilities of animal occurrence and extinction will generally be estimated more accurately if the models used in data analysis account for differences in abundance among sample locations and for the dependence between site-specific abundance and detection. Simulation experiments are used to illustrate conditions wherein these types of models can be expected to outperform alternative estimators of population site occupancy and extinction. ?? 2007 by the Ecological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1890/07-0006.1","issn":"00129658","usgsCitation":"Dorazio, R., 2007, On the choice of statistical models for estimating occurrence and extinction from animal surveys: Ecology, v. 88, no. 11, p. 2773-2782, https://doi.org/10.1890/07-0006.1.","startPage":"2773","endPage":"2782","numberOfPages":"10","costCenters":[],"links":[{"id":487661,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1890/07-0006.1","text":"Publisher Index Page"},{"id":238623,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211347,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1890/07-0006.1"}],"volume":"88","issue":"11","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6dbce4b0c8380cd752cb","contributors":{"authors":[{"text":"Dorazio, R.M. 0000-0003-2663-0468","orcid":"https://orcid.org/0000-0003-2663-0468","contributorId":23475,"corporation":false,"usgs":true,"family":"Dorazio","given":"R.M.","affiliations":[],"preferred":false,"id":430756,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70032834,"text":"70032834 - 2007 - Sediment compaction rates and subsidence in deltaic plains: Numerical constraints and stratigraphic influences","interactions":[],"lastModifiedDate":"2017-11-18T10:02:55","indexId":"70032834","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":972,"text":"Basin Research","active":true,"publicationSubtype":{"id":10}},"title":"Sediment compaction rates and subsidence in deltaic plains: Numerical constraints and stratigraphic influences","docAbstract":"Natural sediment compaction in deltaic plains influences subsidence rates and the evolution of deltaic morphology. Determining compaction rates requires detailed knowledge of subsurface geotechnical properties and depositional history, neither of which is often readily available. To overcome this lack of knowledge, we numerically forward model the incremental sedimentation and compaction of stochastically generated stratigraphies with geotechnical properties typical of modern depositional environments in the Mississippi River delta plain. Using a Monte Carlo approach, the range of probable compaction rates for stratigraphies with compacted thicknesses <150 m and accumulation times <20 kyr. varies, but maximum values rarely exceed a few mm yr<sup>−1</sup>. The fastest compacting stratigraphies are composed primarily of peat and bar sand, whereas the slowest compacting stratigraphies are composed of prodelta mud and natural levee deposits. These results suggest that compaction rates can significantly influence vertical and lateral stratigraphic trends during deltaic evolution.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Basin Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Wiley","doi":"10.1111/j.1365-2117.2006.00310.x","issn":"0950091X","usgsCitation":"Meckel, T., ten Brink, U., and Williams, S., 2007, Sediment compaction rates and subsidence in deltaic plains: Numerical constraints and stratigraphic influences: Basin Research, v. 19, no. 1, p. 19-31, https://doi.org/10.1111/j.1365-2117.2006.00310.x.","productDescription":"13 p.","startPage":"19","endPage":"31","numberOfPages":"13","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":477248,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://hdl.handle.net/1912/1601","text":"External Repository"},{"id":241535,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213870,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1365-2117.2006.00310.x"}],"volume":"19","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-02-05","publicationStatus":"PW","scienceBaseUri":"505b8963e4b08c986b316dbd","contributors":{"authors":[{"text":"Meckel, T.A.","contributorId":91676,"corporation":false,"usgs":true,"family":"Meckel","given":"T.A.","email":"","affiliations":[],"preferred":false,"id":438166,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"ten Brink, Uri S. 0000-0001-6858-3001 utenbrink@usgs.gov","orcid":"https://orcid.org/0000-0001-6858-3001","contributorId":127560,"corporation":false,"usgs":true,"family":"ten Brink","given":"Uri S.","email":"utenbrink@usgs.gov","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true},{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"preferred":false,"id":438164,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Williams, S.J.","contributorId":85203,"corporation":false,"usgs":true,"family":"Williams","given":"S.J.","email":"","affiliations":[],"preferred":false,"id":438165,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
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