{"pageNumber":"832","pageRowStart":"20775","pageSize":"25","recordCount":46730,"records":[{"id":70032760,"text":"70032760 - 2008 - Radar imaging of winter seismic survey activity in the National Petroleum Reserve-Alaska","interactions":[],"lastModifiedDate":"2018-06-16T18:02:16","indexId":"70032760","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3095,"text":"Polar Record","active":true,"publicationSubtype":{"id":10}},"title":"Radar imaging of winter seismic survey activity in the National Petroleum Reserve-Alaska","docAbstract":"<p><span>During the spring of 2006, Radarsat-1 synthetic aperture radar (SAR) imagery was acquired on a continual basis for the Teshekpuk Lake Special Area (TLSA), in the northeast portion of the National Petroleum Reserve, Alaska (NPR-A) in order to monitor lake ice melting processes. During data processing, it was discovered that the Radarsat-1 imagery detected features associated with winter seismic survey activity. Focused analysis of the image time series revealed various aspects of the exploration process such as the grid profile associated with the seismic line surveys as well as trails and campsites associated with the mobile survey crews. Due to the high temporal resolution of the dataset it was possible to track the progress of activities over a one month period. Spaceborne SAR imagery can provide information on the location of winter seismic activity and could be used as a monitoring tool for land and resource managers as increased petroleum-based activity occurs in the TLSA and NPR-A.</span></p>","language":"English","publisher":"Cambridge University Press","doi":"10.1017/S0032247407007206","issn":"00322474","usgsCitation":"Jones, B.M., Rykhus, R., Lu, Z., Arp, C., and Selkowitz, D., 2008, Radar imaging of winter seismic survey activity in the National Petroleum Reserve-Alaska: Polar Record, v. 44, no. 3, p. 227-231, https://doi.org/10.1017/S0032247407007206.","productDescription":"5 p.","startPage":"227","endPage":"231","numberOfPages":"5","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":241462,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213803,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1017/S0032247407007206"}],"volume":"44","issue":"3","noUsgsAuthors":false,"publicationDate":"2008-07-01","publicationStatus":"PW","scienceBaseUri":"505a9385e4b0c8380cd80e85","contributors":{"authors":[{"text":"Jones, Benjamin M. 0000-0002-1517-4711 bjones@usgs.gov","orcid":"https://orcid.org/0000-0002-1517-4711","contributorId":2286,"corporation":false,"usgs":true,"family":"Jones","given":"Benjamin","email":"bjones@usgs.gov","middleInitial":"M.","affiliations":[{"id":118,"text":"Alaska Science Center Geography","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":437792,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rykhus, Russ","contributorId":53575,"corporation":false,"usgs":true,"family":"Rykhus","given":"Russ","email":"","affiliations":[],"preferred":false,"id":437793,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lu, Z.","contributorId":106241,"corporation":false,"usgs":true,"family":"Lu","given":"Z.","affiliations":[],"preferred":false,"id":437796,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Arp, C.D.","contributorId":54715,"corporation":false,"usgs":true,"family":"Arp","given":"C.D.","email":"","affiliations":[],"preferred":false,"id":437794,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Selkowitz, D.J.","contributorId":82886,"corporation":false,"usgs":true,"family":"Selkowitz","given":"D.J.","affiliations":[],"preferred":false,"id":437795,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70032757,"text":"70032757 - 2008 - Carbon dioxide of Pu`u`O`o volcanic plume at Kilauea retrieved by AVIRIS hyperspectral data","interactions":[],"lastModifiedDate":"2019-04-03T14:04:31","indexId":"70032757","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","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":"Carbon dioxide of Pu`u`O`o volcanic plume at Kilauea retrieved by AVIRIS hyperspectral data","docAbstract":"<p><span>A&nbsp;remote sensing&nbsp;approach permits for the first time the derivation of a map of the&nbsp;carbon dioxide concentration&nbsp;in a volcanic&nbsp;plume. The airborne imaging remote sensing overcomes the typical difficulties associated with the ground measurements and permits rapid and large views of the volcanic processes together with the measurements of volatile components exolving from craters. Hyperspectral images in the infrared range (1900–2100&nbsp;nm), where carbon dioxide absorption lines are present, have been used. These images were acquired during an airborne campaign by the&nbsp;Airborne Visible/Infrared Imaging Spectrometer&nbsp;(AVIRIS) over the Pu`u` O`o Vent situated at the Kilauea East&nbsp;Rift zone, Hawaii. Using a&nbsp;radiative transfer&nbsp;model to simulate the measured up-welling spectral radiance and by applying the newly developed mapping technique, the carbon dioxide concentration map of the Pu`u` O`o Vent plume were obtained. The carbon dioxide integrated&nbsp;flux rate&nbsp;were calculated and a mean value of 396</span><span>&nbsp;</span><span>±</span><span>&nbsp;</span><span>138&nbsp;t d</span><sup>−&nbsp;1</sup><span>&nbsp;was obtained. This result is in agreement, within the measurements errors, with those of the ground measurements taken during the airborne campaign.&nbsp;</span>2008 Elsevier Inc.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.rse.2008.03.010","issn":"00344257","usgsCitation":"Spinetti, C., Carrere, V., Buongiorno, M.F., Sutton, A.J., and Elias, T., 2008, Carbon dioxide of Pu`u`O`o volcanic plume at Kilauea retrieved by AVIRIS hyperspectral data: Remote Sensing of Environment, v. 112, no. 6, p. 3192-3199, https://doi.org/10.1016/j.rse.2008.03.010.","productDescription":"8 p.","startPage":"3192","endPage":"3199","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":241426,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213769,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.rse.2008.03.010"}],"volume":"112","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f361e4b0c8380cd4b775","contributors":{"authors":[{"text":"Spinetti, C.","contributorId":64899,"corporation":false,"usgs":true,"family":"Spinetti","given":"C.","affiliations":[],"preferred":false,"id":437778,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Carrere, V.","contributorId":31212,"corporation":false,"usgs":true,"family":"Carrere","given":"V.","affiliations":[],"preferred":false,"id":437777,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Buongiorno, M. Fabrizia","contributorId":102698,"corporation":false,"usgs":true,"family":"Buongiorno","given":"M.","email":"","middleInitial":"Fabrizia","affiliations":[],"preferred":false,"id":437780,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Sutton, A. J. 0000-0003-1902-3977","orcid":"https://orcid.org/0000-0003-1902-3977","contributorId":28983,"corporation":false,"usgs":true,"family":"Sutton","given":"A.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":437776,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Elias, T. 0000-0002-9592-4518","orcid":"https://orcid.org/0000-0002-9592-4518","contributorId":71195,"corporation":false,"usgs":true,"family":"Elias","given":"T.","affiliations":[],"preferred":false,"id":437779,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70033354,"text":"70033354 - 2008 - Late Pleistocene Hansel Valley basaltic ash, northern Lake Bonneville, Utah, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:35","indexId":"70033354","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3217,"text":"Quaternary International","active":true,"publicationSubtype":{"id":10}},"title":"Late Pleistocene Hansel Valley basaltic ash, northern Lake Bonneville, Utah, USA","docAbstract":"The Hansel Valley ash bed lies within 5 cm of the base of deposits of Lake Bonneville (???28 ka) in the vicinity of Great Salt Lake and provides a useful stratigraphic marker for this area of the lake basin. However, it has not been matched to an eruptive edifice, presumably because such an edifice was eroded by waves of Lake Bonneville. We present data for the chemical composition of the tephra and for possible matching lavas and tephras of the region, as well as grain size data for the tephra in an attempt to identify the location of the eruption. Matches with other tephras are negative, but lavas near the coarsest ash deposits match well with the distinctive high values of TiO2 and P2O5 of the ash. Neither chemistry nor grain size data points uniquely to a source area, but an area near the northwest shore of Great Salt Lake and within Curlew Valley is most likely. The Hansel Valley ash is an example of an ash that has no direct numerical date from proximal deposits, despite considerable study, yet nonetheless is useful for stratigraphic studies by virtue of its known stratigraphic position and approximate age. Basaltic tephras commonly are not as widespread as their rhyolitic counterparts, and in some cases apparently are produced by eruptive sources that are short lived and whose edifices are not persistent. ?? 2007 Elsevier Ltd and INQUA.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Quaternary International","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.quaint.2007.03.016","issn":"10406182","usgsCitation":"Miller, D., Oviatt, C.G., and Nash, B., 2008, Late Pleistocene Hansel Valley basaltic ash, northern Lake Bonneville, Utah, USA: Quaternary International, v. 178, no. 1, p. 238-245, https://doi.org/10.1016/j.quaint.2007.03.016.","startPage":"238","endPage":"245","numberOfPages":"8","costCenters":[],"links":[{"id":213378,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.quaint.2007.03.016"},{"id":240999,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"178","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4507e4b0c8380cd66f8f","contributors":{"authors":[{"text":"Miller, D. M. 0000-0003-3711-0441","orcid":"https://orcid.org/0000-0003-3711-0441","contributorId":104422,"corporation":false,"usgs":true,"family":"Miller","given":"D. M.","affiliations":[],"preferred":false,"id":440476,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Oviatt, Charles G.","contributorId":36580,"corporation":false,"usgs":false,"family":"Oviatt","given":"Charles","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":440475,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nash, B.P.","contributorId":35115,"corporation":false,"usgs":true,"family":"Nash","given":"B.P.","email":"","affiliations":[],"preferred":false,"id":440474,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030262,"text":"70030262 - 2008 - The effects of water-level fluctuations on vegetation in a Lake Huron wetland","interactions":[],"lastModifiedDate":"2012-03-12T17:21:01","indexId":"70030262","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3750,"text":"Wetlands","onlineIssn":"1943-6246","printIssn":"0277-5212","active":true,"publicationSubtype":{"id":10}},"title":"The effects of water-level fluctuations on vegetation in a Lake Huron wetland","docAbstract":"The diversity and resultant habitat value of wetland plant communities in the Laurentian Great Lake's are dependent on water-level fluctuations of varying frequency and amplitude. Conceptual models have described the response of vegetation to alternating high and low lake levels, but few quantitative studies have documented the changes that occur. In response to recent concerns over shoreline management activities during an ongoing period of low lake levels in lakes Superior, Michigan, and Huron that began in 1999, we analyzed a quantitative data set from Saginaw Bay of Lake Huron collected from 1988 to 1993 during a previous lake-level decline to provide the needed information on vegetation responses. Transects were established that followed topographic contours with water-level histories that differed across a six-year period, ranging from barely flooded to dewatered for varying numbers of years to never dewatered. Percent cover data from randomly placed quadrats along those transects were analyzed to assess floristic changes over time, document development of distinct plant assemblages, and relate the results to lake-level changes. Ordinations showed that plant assemblages sorted out by transects that reflect differing water-level histories. Distinction of assemblages was maintained for at least three years, although the composition and positioning of those assemblages changed as lake levels changed. We present a model that uses orthogonal axes to plot transects by years out of water against distance above water and sorted those transects in a manner that matched ordination results. The model suggests that vegetation response following dewatering is dependent on both position along the water level/soil moisture gradient and length of time since dewatering. This study provided quantitative evidence that lake-level fluctuations drive vegetative change in Great Lakes wetlands, and it may assist in making decisions regarding shoreline management in areas that historically supported wetlands. ?? 2008, The Society of Wetland Scientists.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Wetlands","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1672/07-129.1","issn":"02775","usgsCitation":"Wilcox, D., and Nichols, S.J., 2008, The effects of water-level fluctuations on vegetation in a Lake Huron wetland: Wetlands, v. 28, no. 2, p. 487-501, https://doi.org/10.1672/07-129.1.","startPage":"487","endPage":"501","numberOfPages":"15","costCenters":[],"links":[{"id":476752,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://hdl.handle.net/20.500.12648/2271","text":"External Repository"},{"id":212061,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1672/07-129.1"},{"id":239473,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"28","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505babace4b08c986b322fcc","contributors":{"authors":[{"text":"Wilcox, D.A.","contributorId":55382,"corporation":false,"usgs":true,"family":"Wilcox","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":426367,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Nichols, S. J.","contributorId":63770,"corporation":false,"usgs":true,"family":"Nichols","given":"S.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":426368,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031981,"text":"70031981 - 2008 - Change in the forested and developed landscape of the Lake Tahoe basin, California and Nevada, USA, 1940-2002","interactions":[],"lastModifiedDate":"2012-03-12T17:21:28","indexId":"70031981","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1687,"text":"Forest Ecology and Management","active":true,"publicationSubtype":{"id":10}},"title":"Change in the forested and developed landscape of the Lake Tahoe basin, California and Nevada, USA, 1940-2002","docAbstract":"The current ecological state of the Lake Tahoe basin has been shaped by significant landscape-altering human activity and management practices since the mid-1850s; first through widespread timber harvesting from the 1850s to 1920s followed by urban development from the 1950s to the present. Consequences of landscape change, both from development and forest management practices including fire suppression, have prompted rising levels of concern for the ecological integrity of the region. The impacts from these activities include decreased water quality, degraded biotic communities, and increased fire hazard. To establish an understanding of the Lake Tahoe basin's landscape change in the context of forest management and development we mapped, quantified, and described the spatial and temporal distribution and variability of historical changes in land use and land cover in the southern Lake Tahoe basin (279 km2) from 1940 to 2002. Our assessment relied on post-classification change detection of multi-temporal land-use/cover and impervious-surface-area data that were derived through manual interpretation, image processing, and GIS data integration for four dates of imagery: 1940, 1969, 1987, and 2002. The most significant land conversion during the 62-year study period was an increase in developed lands with a corresponding decrease in forests, wetlands, and shrublands. Forest stand densities increased throughout the 62-year study period, and modern thinning efforts resulted in localized stand density decreases in the latter part of the study period. Additionally forests were gained from succession, and towards the end of the study period extensive tree mortality occurred. The highest rates of change occurred between 1940 and 1969, corresponding with dramatic development, then rates declined through 2002 for all observed landscape changes except forest density decrease and tree mortality. Causes of landscape change included regional population growth, tourism demands, timber harvest for local use, fire suppression, bark beetle attack, and fuels reduction activities. Results from this study offer land managers within the Lake Tahoe basin and in similar regions a basis for making better informed land-use and management decisions to potentially minimize detrimental ecological impacts of landscape change. The perspective to be gained is based on quantitative retrospection of the effects of human-driven changes and the impacts of management action or inaction to the forested landscape. ?? 2008 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Forest Ecology and Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.foreco.2008.02.028","issn":"03781127","usgsCitation":"Raumann, C., and Cablk, M.E., 2008, Change in the forested and developed landscape of the Lake Tahoe basin, California and Nevada, USA, 1940-2002: Forest Ecology and Management, v. 255, no. 8-9, p. 3424-3439, https://doi.org/10.1016/j.foreco.2008.02.028.","startPage":"3424","endPage":"3439","numberOfPages":"16","costCenters":[],"links":[{"id":214679,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.foreco.2008.02.028"},{"id":242425,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"255","issue":"8-9","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f401e4b0c8380cd4baa9","contributors":{"authors":[{"text":"Raumann, C.G.","contributorId":24583,"corporation":false,"usgs":true,"family":"Raumann","given":"C.G.","affiliations":[],"preferred":false,"id":433989,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cablk, Mary E.","contributorId":26517,"corporation":false,"usgs":true,"family":"Cablk","given":"Mary","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":433990,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70033349,"text":"70033349 - 2008 - Remote sensing and GIS approach for water-well site selection, southwest Iran","interactions":[],"lastModifiedDate":"2012-03-12T17:21:35","indexId":"70033349","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1574,"text":"Environmental & Engineering Geoscience","printIssn":"1078-7275","active":true,"publicationSubtype":{"id":10}},"title":"Remote sensing and GIS approach for water-well site selection, southwest Iran","docAbstract":"The Pabdeh-Lali Anticline of northern Khuzestan province is located in southwestern Iran and occupies 790 km2. This structure is situated in the Zagros folded belt. As a result of well-developed karst systems in the anticlinal axis, the water supply potential is high and is drained by many peripheral springs. However, there is a scarcity of water for agriculture and population centers on the anticlinal flanks, which imposes a severe problem in terms of area development. This study combines remotely sensed (RS) data and a geographical information system (GIS) into a RSGIS technique to delineate new areas for groundwater development and specific sites for drilling productive water wells. Toward these goals, RS data were used to develop GIS layers for lithology, structural geology, topographic slope, elevation, and drainage density. Field measurements were made to create spring-location and groundwater-quality GIS layers. Subsequently, expert choice and relational methods were used in a GIS environment to conjunctively analyze all layers to delineate preferable regions and 43 individual sites in which to drill water wells. Results indicate that the most preferred areas are, in preferential order, within recent alluvial deposits, the Bakhtiyari Conglomerates, and the Aghajari Sandstone. The Asmari Limestone and other units have much lower potential for groundwater supplies. Potential usefulness of the RSGIS method was indicated when six out of nine producing wells recently drilled by the Khozestan Water and Power Authority (which had no knowledge of this study) were located in areas preferentially selected by this technique.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental and Engineering Geoscience","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2113/gseegeosci.14.4.315","issn":"10787","usgsCitation":"Rangzan, K., Charchi, A., Abshirini, E., and Dinger, J., 2008, Remote sensing and GIS approach for water-well site selection, southwest Iran: Environmental & Engineering Geoscience, v. 14, no. 4, p. 315-326, https://doi.org/10.2113/gseegeosci.14.4.315.","startPage":"315","endPage":"326","numberOfPages":"12","costCenters":[],"links":[{"id":240997,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213376,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/gseegeosci.14.4.315"}],"volume":"14","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aa6f1e4b0c8380cd85129","contributors":{"authors":[{"text":"Rangzan, K.","contributorId":39589,"corporation":false,"usgs":true,"family":"Rangzan","given":"K.","email":"","affiliations":[],"preferred":false,"id":440450,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Charchi, A.","contributorId":82928,"corporation":false,"usgs":true,"family":"Charchi","given":"A.","email":"","affiliations":[],"preferred":false,"id":440452,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Abshirini, E.","contributorId":22972,"corporation":false,"usgs":true,"family":"Abshirini","given":"E.","email":"","affiliations":[],"preferred":false,"id":440449,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dinger, J.","contributorId":69788,"corporation":false,"usgs":true,"family":"Dinger","given":"J.","email":"","affiliations":[],"preferred":false,"id":440451,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70033176,"text":"70033176 - 2008 - An annual plant growth proxy in the Mojave Desert using MODIS-EVI data","interactions":[],"lastModifiedDate":"2012-03-12T17:21:38","indexId":"70033176","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3380,"text":"Sensors","active":true,"publicationSubtype":{"id":10}},"title":"An annual plant growth proxy in the Mojave Desert using MODIS-EVI data","docAbstract":"In the arid Mojave Desert, the phenological response of vegetation is largely dependent upon the timing and amount of rainfall, and maps of annual plant cover at any one point in time can vary widely. Our study developed relative annual plant growth models as proxies for annual plant cover using metrics that captured phenological variability in Moderate-Resolution Imaging Spectroradiometer (MODIS) Enhanced Vegetation Index (EVI) satellite images. We used landscape phenologies revealed in MODIS data together with ecological knowledge of annual plant seasonality to develop a suite of metrics to describe annual growth on a yearly basis. Each of these metrics was applied to temporally-composited MODIS-EVI images to develop a relative model of annual growth. Each model was evaluated by testing how well it predicted field estimates of annual cover collected during 2003 and 2005 at the Mojave National Preserve. The best performing metric was the spring difference metric, which compared the average of three spring MODIS-EVI composites of a given year to that of 2002, a year of record drought. The spring difference metric showed correlations with annual plant cover of R2 = 0.61 for 2005 and R 2 = 0.47 for 2003. Although the correlation is moderate, we consider it supportive given the characteristics of the field data, which were collected for a different study in a localized area and are not ideal for calibration to MODIS pixels. A proxy for annual growth potential was developed from the spring difference metric of 2005 for use as an environmental data layer in desert tortoise habitat modeling. The application of the spring difference metric to other imagery years presents potential for other applications such as fuels, invasive species, and dust-emission monitoring in the Mojave Desert.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Sensors","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.3390/s8127792","issn":"14248","usgsCitation":"Wallace, C., and Thomas, K., 2008, An annual plant growth proxy in the Mojave Desert using MODIS-EVI data: Sensors, v. 8, no. 12, p. 7792-7808, https://doi.org/10.3390/s8127792.","startPage":"7792","endPage":"7808","numberOfPages":"17","costCenters":[],"links":[{"id":476678,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3390/s8127792","text":"Publisher Index Page"},{"id":213463,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3390/s8127792"},{"id":241089,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"8","issue":"12","noUsgsAuthors":false,"publicationDate":"2008-12-03","publicationStatus":"PW","scienceBaseUri":"5059e9ffe4b0c8380cd4859b","contributors":{"authors":[{"text":"Wallace, C.S.A.","contributorId":89712,"corporation":false,"usgs":true,"family":"Wallace","given":"C.S.A.","email":"","affiliations":[],"preferred":false,"id":439695,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Thomas, K.A.","contributorId":100934,"corporation":false,"usgs":true,"family":"Thomas","given":"K.A.","email":"","affiliations":[],"preferred":false,"id":439696,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70032743,"text":"70032743 - 2008 - A consistent framework for Horton regression statistics that leads to a modified Hack's law","interactions":[],"lastModifiedDate":"2012-03-12T17:21:32","indexId":"70032743","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1801,"text":"Geomorphology","active":true,"publicationSubtype":{"id":10}},"title":"A consistent framework for Horton regression statistics that leads to a modified Hack's law","docAbstract":"A statistical framework is introduced that resolves important problems with the interpretation and use of traditional Horton regression statistics. The framework is based on a univariate regression model that leads to an alternative expression for Horton ratio, connects Horton regression statistics to distributional simple scaling, and improves the accuracy in estimating Horton plot parameters. The model is used to examine data for drainage area A and mainstream length L from two groups of basins located in different physiographic settings. Results show that confidence intervals for the Horton plot regression statistics are quite wide. Nonetheless, an analysis of covariance shows that regression intercepts, but not regression slopes, can be used to distinguish between basin groups. The univariate model is generalized to include n > 1 dependent variables. For the case where the dependent variables represent ln A and ln L, the generalized model performs somewhat better at distinguishing between basin groups than two separate univariate models. The generalized model leads to a modification of Hack's law where L depends on both A and Strahler order ??. Data show that ?? plays a statistically significant role in the modified Hack's law expression. ?? 2008 Elsevier B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geomorphology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.geomorph.2008.06.002","issn":"01695","usgsCitation":"Furey, P., and Troutman, B., 2008, A consistent framework for Horton regression statistics that leads to a modified Hack's law: Geomorphology, v. 102, no. 3-4, p. 603-614, https://doi.org/10.1016/j.geomorph.2008.06.002.","startPage":"603","endPage":"614","numberOfPages":"12","costCenters":[],"links":[{"id":214050,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.geomorph.2008.06.002"},{"id":241737,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"102","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e396e4b0c8380cd460fc","contributors":{"authors":[{"text":"Furey, P.R.","contributorId":11015,"corporation":false,"usgs":true,"family":"Furey","given":"P.R.","email":"","affiliations":[],"preferred":false,"id":437706,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Troutman, B.M.","contributorId":73638,"corporation":false,"usgs":true,"family":"Troutman","given":"B.M.","email":"","affiliations":[],"preferred":false,"id":437707,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70033174,"text":"70033174 - 2008 - Using sequential self-calibration method to identify conductivity distribution: Conditioning on tracer test data","interactions":[],"lastModifiedDate":"2012-03-12T17:21:38","indexId":"70033174","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2701,"text":"Mathematical Geosciences","active":true,"publicationSubtype":{"id":10}},"title":"Using sequential self-calibration method to identify conductivity distribution: Conditioning on tracer test data","docAbstract":"An iterative inverse method, the sequential self-calibration method, is developed for mapping spatial distribution of a hydraulic conductivity field by conditioning on nonreactive tracer breakthrough curves. A streamline-based, semi-analytical simulator is adopted to simulate solute transport in a heterogeneous aquifer. The simulation is used as the forward modeling step. In this study, the hydraulic conductivity is assumed to be a deterministic or random variable. Within the framework of the streamline-based simulator, the efficient semi-analytical method is used to calculate sensitivity coefficients of the solute concentration with respect to the hydraulic conductivity variation. The calculated sensitivities account for spatial correlations between the solute concentration and parameters. The performance of the inverse method is assessed by two synthetic tracer tests conducted in an aquifer with a distinct spatial pattern of heterogeneity. The study results indicate that the developed iterative inverse method is able to identify and reproduce the large-scale heterogeneity pattern of the aquifer given appropriate observation wells in these synthetic cases. ?? International Association for Mathematical Geology 2008.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Mathematical Geosciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s11004-008-9160-x","issn":"18748","usgsCitation":"Hu, B., and He, C., 2008, Using sequential self-calibration method to identify conductivity distribution: Conditioning on tracer test data: Mathematical Geosciences, v. 40, no. 8, p. 845-859, https://doi.org/10.1007/s11004-008-9160-x.","startPage":"845","endPage":"859","numberOfPages":"15","costCenters":[],"links":[{"id":213428,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s11004-008-9160-x"},{"id":241053,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"40","issue":"8","noUsgsAuthors":false,"publicationDate":"2008-05-08","publicationStatus":"PW","scienceBaseUri":"505bc09de4b08c986b32a21a","contributors":{"authors":[{"text":"Hu, B.X.","contributorId":17838,"corporation":false,"usgs":true,"family":"Hu","given":"B.X.","email":"","affiliations":[],"preferred":false,"id":439687,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"He, C.","contributorId":76951,"corporation":false,"usgs":true,"family":"He","given":"C.","email":"","affiliations":[],"preferred":false,"id":439688,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031968,"text":"70031968 - 2008 - Space and habitat use by black bears in the Elwha valley prior to dam removal","interactions":[],"lastModifiedDate":"2017-11-17T14:32:46","indexId":"70031968","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2900,"text":"Northwest Science","onlineIssn":"2161-9859","printIssn":"0029-344X","active":true,"publicationSubtype":{"id":10}},"title":"Space and habitat use by black bears in the Elwha valley prior to dam removal","docAbstract":"Dam removal and subsequent restoration of salmon to the Elwha River is expected to cause a shift in nutrient dynamics within the watershed. To document how this influx of nutrients and energy may affect black bear (Ursus americanus) ecology, we used radio-telemetry to record movements of 11 male and two female black bears in the Elwha Valley from 2002-06. Our objective was to collect baseline data on bear movements prior to dam removal. We calculated annual home ranges, described seasonal timing of den entry and emergence, and described seasonal patterns of distribution and habitat use. Adaptive kernel home ranges were larger formales (mean = 151.1 km2, SE = 21.4) than females (mean = 38.8 km2, SE = 13.0). Males ranged widely and frequently left the watershed during late summer. Further, they exhibited predictable and synchronous patterns of elevation change throughout each year. Bears entered their winter dens between 8 October and 15 December and emerged from dens between 10 March and 9 May. Male bears used low-elevation conifer and hardwood forests along the Elwha floodplain during spring, mid- to high-elevation forests and meadows during early summer, high-elevation forests, meadows and shrubs during late summer, and mid-elevation forests, shrubs and meadows during fall. Data acquired during this study provide important baseline information for comparison after dam removal, when bears may alter their late summer and fall movement and denning patterns to take advantage of energy-rich spawning salmon.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Northwest Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"0029344X","usgsCitation":"Sager-Fradkin, K., Jenkins, K., Happe, P., Beecham, J., Wright, R., and Hoffman, R., 2008, Space and habitat use by black bears in the Elwha valley prior to dam removal: Northwest Science, v. 82, no. SPEC.ISS., p. 164-178.","startPage":"164","endPage":"178","numberOfPages":"15","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":242756,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"82","issue":"SPEC.ISS.","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9404e4b08c986b31a7eb","contributors":{"authors":[{"text":"Sager-Fradkin, K.A.","contributorId":94515,"corporation":false,"usgs":true,"family":"Sager-Fradkin","given":"K.A.","email":"","affiliations":[],"preferred":false,"id":433929,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jenkins, K.J.","contributorId":101371,"corporation":false,"usgs":true,"family":"Jenkins","given":"K.J.","email":"","affiliations":[],"preferred":false,"id":433930,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Happe, P.J.","contributorId":20109,"corporation":false,"usgs":true,"family":"Happe","given":"P.J.","email":"","affiliations":[],"preferred":false,"id":433926,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Beecham, J.J.","contributorId":80101,"corporation":false,"usgs":true,"family":"Beecham","given":"J.J.","email":"","affiliations":[],"preferred":false,"id":433928,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Wright, R.G.","contributorId":9622,"corporation":false,"usgs":true,"family":"Wright","given":"R.G.","email":"","affiliations":[],"preferred":false,"id":433925,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Hoffman, R.A.","contributorId":61661,"corporation":false,"usgs":true,"family":"Hoffman","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":433927,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70033119,"text":"70033119 - 2008 - Investigation of flow and transport processes at the MADE site using ensemble Kalman filter","interactions":[],"lastModifiedDate":"2012-03-12T17:21:35","indexId":"70033119","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","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":"Investigation of flow and transport processes at the MADE site using ensemble Kalman filter","docAbstract":"In this work the ensemble Kalman filter (EnKF) is applied to investigate the flow and transport processes at the macro-dispersion experiment (MADE) site in Columbus, MS. The EnKF is a sequential data assimilation approach that adjusts the unknown model parameter values based on the observed data with time. The classic advection-dispersion (AD) and the dual-domain mass transfer (DDMT) models are employed to analyze the tritium plume during the second MADE tracer experiment. The hydraulic conductivity (K), longitudinal dispersivity in the AD model, and mass transfer rate coefficient and mobile porosity ratio in the DDMT model, are estimated in this investigation. Because of its sequential feature, the EnKF allows for the temporal scaling of transport parameters during the tritium concentration analysis. Inverse simulation results indicate that for the AD model to reproduce the extensive spatial spreading of the tritium observed in the field, the K in the downgradient area needs to be increased significantly. The estimated K in the AD model becomes an order of magnitude higher than the in situ flowmeter measurements over a large portion of media. On the other hand, the DDMT model gives an estimation of K that is much more comparable with the flowmeter values. In addition, the simulated concentrations by the DDMT model show a better agreement with the observed values. The root mean square (RMS) between the observed and simulated tritium plumes is 0.77 for the AD model and 0.45 for the DDMT model at 328 days. Unlike the AD model, which gives inconsistent K estimates at different times, the DDMT model is able to invert the K values that consistently reproduce the observed tritium concentrations through all times. ?? 2008 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Advances in Water Resources","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.advwatres.2008.03.006","issn":"03091708","usgsCitation":"Liu, G., Chen, Y., and Zhang, D., 2008, Investigation of flow and transport processes at the MADE site using ensemble Kalman filter: Advances in Water Resources, v. 31, no. 7, p. 975-986, https://doi.org/10.1016/j.advwatres.2008.03.006.","startPage":"975","endPage":"986","numberOfPages":"12","costCenters":[],"links":[{"id":213125,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.advwatres.2008.03.006"},{"id":240718,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"31","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3e89e4b0c8380cd63e55","contributors":{"authors":[{"text":"Liu, Gaisheng","contributorId":15158,"corporation":false,"usgs":true,"family":"Liu","given":"Gaisheng","email":"","affiliations":[],"preferred":false,"id":439453,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chen, Y.","contributorId":7019,"corporation":false,"usgs":true,"family":"Chen","given":"Y.","email":"","affiliations":[],"preferred":false,"id":439452,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zhang, Dongxiao","contributorId":26409,"corporation":false,"usgs":true,"family":"Zhang","given":"Dongxiao","email":"","affiliations":[],"preferred":false,"id":439454,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70035274,"text":"70035274 - 2008 - Dike orientations in the late jurassic independence dike swarm and implications for vertical-axis tectonic rotations in eastern California","interactions":[],"lastModifiedDate":"2012-03-12T17:21:54","indexId":"70035274","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3459,"text":"Special Paper of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Dike orientations in the late jurassic independence dike swarm and implications for vertical-axis tectonic rotations in eastern California","docAbstract":"Analysis of the strikes of 3841 dikes in 47 domains in the 500-km-long Late Jurassic Independence dike swarm indicates a distribution that is skewed clockwise from the dominant northwest strike. Independence dike swarm azimuths tend to cluster near 325?? ?? 30??, consistent with initial subparallel intrusion along much of the swarm. Dike azimuths in a quarter of the domains vary widely from the dominant trend. In domains in the essentially unrotated Sierra Nevada block, mean dike azimuths range mostly between 300?? and 320??, with the exception of Mount Goddard (247??). Mean dike azimuths in domains in the Basin and Range Province in the Argus, Inyo, and White Mountains areas range from 291?? to 354?? the mean is 004?? in the El Paso Mountains. In the Mojave Desert, mean dike azimuths range from 318?? to 023??, and in the eastern Transverse Ranges, they range from 316?? to 051??. Restoration for late Cenozoic vertical-axis rotations, suggested by paleodeclinations determined from published studies from nearby Miocene and younger rocks, shifts dike azimuths into better agreement with azimuths measured in the tectonically stable Sierra Nevada. This confirms that vertical-axis tectonic rotations explain some of the dispersion in orientation, especially in the Mojave Desert and eastern Transverse Ranges, and that the dike orientations can be a useful if imperfect guide to tectonic rotations where paleomagnetic data do not exist. Large deviations from the main trend of the swarm may reflect (1) clockwise rotations for which there is no paleomagnetic evidence available, (2) dike intrusions of other ages, (3) crack filling at angles oblique or perpendicular to the main swarm, (4) pre-Miocene rotations, or (5) unrecognized domain boundaries between dike localities and sites with paleomagnetic determinations. ?? 2008 The Geological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Special Paper of the Geological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/2008.2438(17)","issn":"00721077","usgsCitation":"Hopson, R., Hillhouse, J.W., and Howard, K.A., 2008, Dike orientations in the late jurassic independence dike swarm and implications for vertical-axis tectonic rotations in eastern California: Special Paper of the Geological Society of America, no. 438, p. 481-498, https://doi.org/10.1130/2008.2438(17).","startPage":"481","endPage":"498","numberOfPages":"18","costCenters":[],"links":[{"id":243102,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":215307,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/2008.2438(17)"}],"issue":"438","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a019de4b0c8380cd4fc90","contributors":{"authors":[{"text":"Hopson, R.F.","contributorId":77379,"corporation":false,"usgs":true,"family":"Hopson","given":"R.F.","email":"","affiliations":[],"preferred":false,"id":449983,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hillhouse, John W.","contributorId":29475,"corporation":false,"usgs":true,"family":"Hillhouse","given":"John","middleInitial":"W.","affiliations":[],"preferred":false,"id":449981,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Howard, K. A.","contributorId":48938,"corporation":false,"usgs":false,"family":"Howard","given":"K.","middleInitial":"A.","affiliations":[],"preferred":false,"id":449982,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70033106,"text":"70033106 - 2008 - SHRIMP-RG U-Pb isotopic systematics of zircon from the Angel Lake orthogneiss, East Humboldt Range, Nevada: Is this really archean crust?","interactions":[],"lastModifiedDate":"2013-02-28T11:01:15","indexId":"70033106","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1820,"text":"Geosphere","active":true,"publicationSubtype":{"id":10}},"title":"SHRIMP-RG U-Pb isotopic systematics of zircon from the Angel Lake orthogneiss, East Humboldt Range, Nevada: Is this really archean crust?","docAbstract":"New SHRIMP-RG (sensitive high-resolution ion microprobe-reverse geometry) data confirm the existence of Archean components within zircon grains of a sample from the orthogneiss of Angel Lake, Nevada, United States, previously interpreted as a nappe of Archean crust. However, the combined evidence strongly suggests that this orthogneiss is a highly deformed, Late Cretaceous monzogranite derived from melting of a sedimentary source dominated by Archean detritus. Zircon grains from the same sample used previously for isotope dilution-thermal ionization mass spectrometry (ID-TIMS) isotopic work were analyzed using the SHRIMP-RG to better define the age and origin of the orthogneiss. Prior to analysis, imaging revealed a morphological variability and intragrain, polyphase nature of the zircon population. The SHRIMP-RG yielded 207Pb/206Pb ages between ca. 2430 and 2580 Ma (a best-fit mean <sup>207</sup>Pb/<sup>206</sup>Pb age of 2531 ± 19 Ma; 95% confidence) from mostly rounded to subrounded zircons and zircon components (cores). In addition, several analyses from rounded to subrounded cores or grains yielded discordant <sup>207</sup>Pb/<sup>206</sup>Pb ages between ca. 1460 and ca. 2170 Ma, consistent with known regional magmatic events. All cores of Proterozoic to latest Archean age were encased within clear, typically low Th/U (<0.015), oscillatory zoned, mostly euhedral, Late Cretaceous zircon. The younger zircon yielded essentially concordant <sup>206</sup>Pb/<sup>238</sup>U ages between 72 and 91 Ma, consistent with magmatic ages from Lamoille Canyon to the south. An age of ca. 90 Ma is suggested, the younger <sup>206</sup>Pb/<sup>238</sup>U ages resulting from Pb loss. The Cretaceous and Precambrian zircon components also have distinct trace element characteristics, indicating that these age groups are not related to the same igneous source. These results support recent geophysical interpretations and negate the contention that the Archean-Proterozoic boundary extends into the central Great Basin area. They further suggest that the world-class gold deposits along the Carlin Trend are not underlain by Archean cratonal crust, but rather by the Proterozoic Mojave province and Neoproterozoic and Paleozoic metasedimentary sequences dominated by detritus derived from Late Archean sources rather than Proterozoic sources, as is evident farther to the south in the Ruby Mountains.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geosphere","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Geological Society of America","publisherLocation":"Boulder, CO","doi":"10.1130/GES00164.1","issn":"15530","usgsCitation":"Premo, W.R., Castineiras, P., and Wooden, J., 2008, SHRIMP-RG U-Pb isotopic systematics of zircon from the Angel Lake orthogneiss, East Humboldt Range, Nevada: Is this really archean crust?: Geosphere, v. 4, no. 6, p. 963-975, https://doi.org/10.1130/GES00164.1.","productDescription":"13 p.","startPage":"963","endPage":"975","numberOfPages":"13","costCenters":[{"id":218,"text":"Denver Federal Center","active":false,"usgs":true},{"id":661,"text":"Western Mineral Resources Science Center-Menlo Park Office","active":false,"usgs":true}],"links":[{"id":476680,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1130/ges00164.1","text":"Publisher Index Page"},{"id":213491,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/GES00164.1"},{"id":241118,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Nevada","otherGeospatial":"Angel Lake","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -115.008,41.025 ], [ -115.008,41.027 ], [ -115.085,41.027 ], [ -115.085,41.025 ], [ -115.008,41.025 ] ] ] } } ] }","volume":"4","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aaf4be4b0c8380cd874df","contributors":{"authors":[{"text":"Premo, Wayne R. 0000-0001-9904-4801 wpremo@usgs.gov","orcid":"https://orcid.org/0000-0001-9904-4801","contributorId":1697,"corporation":false,"usgs":true,"family":"Premo","given":"Wayne","email":"wpremo@usgs.gov","middleInitial":"R.","affiliations":[],"preferred":true,"id":439394,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Castineiras, Pedro","contributorId":20986,"corporation":false,"usgs":true,"family":"Castineiras","given":"Pedro","email":"","affiliations":[],"preferred":false,"id":439395,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wooden, Joseph L.","contributorId":32209,"corporation":false,"usgs":true,"family":"Wooden","given":"Joseph L.","affiliations":[],"preferred":false,"id":439396,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70032035,"text":"70032035 - 2008 - Anthropogenic influences on the input and biogeochemical cycling of nutrients and mercury in Great Salt Lake, Utah, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:27","indexId":"70032035","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":835,"text":"Applied Geochemistry","active":true,"publicationSubtype":{"id":10}},"title":"Anthropogenic influences on the input and biogeochemical cycling of nutrients and mercury in Great Salt Lake, Utah, USA","docAbstract":"Despite the ecological and economic importance of Great Salt Lake (GSL), little is known about the input and biogeochemical cycling of nutrients and trace elements in the lake. In response to increasing public concern regarding anthropogenic inputs to the GSL ecosystem, the US Geological Survey (USGS) and US Fish and Wildlife Service (USFWS) initiated coordinated studies to quantify and evaluate the significance of nutrient and Hg inputs into GSL. A 6??? decrease in ??15N observed in brine shrimp (Artemia franciscana) samples collected from GSL during summer time periods is likely due to the consumption of cyanobacteria produced in freshwater bays entering the lake. Supporting data collected from the outflow of Farmington Bay indicates decreasing trends in ??15N in particulate organic matter (POM) during the mid-summer time period, reflective of increasing proportions of cyanobacteria in algae exported to GSL on a seasonal basis. The C:N molar ratio of POM in outflow from Farmington Bay decreases during the summer period, supportive of the increased activity of N fixation indicated by decreasing ??15N in brine shrimp and POM. Although N fixation is only taking place in the relatively freshwater inflows to GSL, data indicate that influx of fresh water influences large areas of the lake. Separation of GSL into two distinct hydrologic and geochemical systems from the construction of a railroad causeway in the late 1950s has created a persistent and widespread anoxic layer in the southern part of GSL. This anoxic layer, referred to as the deep brine layer (DBL), has high rates of SO42 - reduction, likely increasing the Hg methylation capacity. High concentrations of methyl mercury (CH3Hg) (median concentration = 24 ng/L) were observed in the DBL with a significant proportion (31-60%) of total Hg in the CH3Hg form. Hydroacoustic and sediment-trap evidence indicate that turbulence introduced by internal waves generated during sustained wind events can temporarily mix the elevated CH3Hg concentrations in the DBL with the more biologically active upper brine layer (UBL). Brine shrimp collected during the summer/fall time periods contained elevated Hg concentrations (median concentration = 0.34 mg/kg, dry weight (dw)) relative to samples collected during the spring (median concentration < 0.2 mg/kg, dw). Higher Hg in brine shrimp during the summer and fall may reflect the higher proportion of adult brine shrimp during this time period, resulting in an increased time for bioaccumulation of Hg. Eared grebes (Podiceps nigricollis) consume brine shrimp from GSL during the fall molting period. Median Hg concentrations in eared grebe livers increased by almost three times during the 3-5 month fall molting period. Selected duck species utilizing GSL have consistently exceeded the US Environmental Protection Agency (USEPA) screening level for Hg (0.3 mg/kg Hg wet weight), resulting in the issuance of warnings against unlimited human consumption of breast muscle tissue.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Applied Geochemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.apgeochem.2008.03.002","issn":"08832927","usgsCitation":"Naftz, D., Angeroth, C., Kenney, T., Waddell, B., Darnall, N., Silva, S., Perschon, C., and Whitehead, J., 2008, Anthropogenic influences on the input and biogeochemical cycling of nutrients and mercury in Great Salt Lake, Utah, USA: Applied Geochemistry, v. 23, no. 6, p. 1731-1744, https://doi.org/10.1016/j.apgeochem.2008.03.002.","startPage":"1731","endPage":"1744","numberOfPages":"14","costCenters":[],"links":[{"id":242726,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214964,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.apgeochem.2008.03.002"}],"volume":"23","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ec5ae4b0c8380cd49204","contributors":{"authors":[{"text":"Naftz, D.","contributorId":37158,"corporation":false,"usgs":true,"family":"Naftz","given":"D.","affiliations":[],"preferred":false,"id":434249,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Angeroth, C.","contributorId":53607,"corporation":false,"usgs":true,"family":"Angeroth","given":"C.","email":"","affiliations":[],"preferred":false,"id":434251,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kenney, T.","contributorId":93281,"corporation":false,"usgs":true,"family":"Kenney","given":"T.","email":"","affiliations":[],"preferred":false,"id":434255,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Waddell, B.","contributorId":17007,"corporation":false,"usgs":true,"family":"Waddell","given":"B.","email":"","affiliations":[],"preferred":false,"id":434248,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Darnall, N.","contributorId":86551,"corporation":false,"usgs":true,"family":"Darnall","given":"N.","affiliations":[],"preferred":false,"id":434254,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Silva, S.","contributorId":68518,"corporation":false,"usgs":true,"family":"Silva","given":"S.","affiliations":[],"preferred":false,"id":434253,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Perschon, C.","contributorId":52403,"corporation":false,"usgs":true,"family":"Perschon","given":"C.","email":"","affiliations":[],"preferred":false,"id":434250,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Whitehead, J.","contributorId":54409,"corporation":false,"usgs":true,"family":"Whitehead","given":"J.","affiliations":[],"preferred":false,"id":434252,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70033104,"text":"70033104 - 2008 - Application of synchrotron methods to assess the uptake of roadway-derived Zn by earthworms in an urban soil","interactions":[],"lastModifiedDate":"2018-10-22T09:19:18","indexId":"70033104","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2748,"text":"Mineralogical Magazine","active":true,"publicationSubtype":{"id":10}},"title":"Application of synchrotron methods to assess the uptake of roadway-derived Zn by earthworms in an urban soil","docAbstract":"<p>The impact of human activities on biogeochemical cycles in terrestrial environments is nowhere more apparent than in urban landscapes. Trace metals, collected on roadways and transported by storm water, may contaminate soils and sediments associated with storm water management systems. These systems will accumulate metals and associated sediments may reach toxic levels for terrestrial and aquatic organisms using the retention basins as habitat. The fate and bioavailability of these metals once deposited is poorly understood. Here we present results from a dose-response experiment that examines the application of synchrotron X-ray fluorescence methods (μ-SXRF) to test the hypothesis that earthworms will bio-accumulate Zn in a roadway-dust contaminated soil system providing a potential pathway for roadway contaminants into the terrestrial food web, and that the storage and distribution of Zn will change with the level of exposure reflecting the micronutrient status of Zn.</p><p><i>Lumbricus friendi</i><span>&nbsp;</span>was exposed to Zn-bearing roadway dust amended to a field soil at six target concentrations ranging from background levels (45 mg/kg Zn) to highly contaminated levels (460 mg/kg Zn) designed to replicate the observed concentration range in storm-water retention basin soils. After a 30 day exposure, Zn storage in the intestine is positively correlated with dose and there is a change in the pattern of Zn storage within the intestine. This relationship is only clear when μ-SXRF Zn map data is coupled with a traditional toxicological approach, and suggests that the gut concentration in<span>&nbsp;</span><i>L. friendi</i><span>&nbsp;</span>is a better indicator of Zn bioaccumulation and storage than the total body burden.</p>","language":"English","publisher":"GSW","doi":"10.1180/minmag.2008.072.1.191","issn":"00264","usgsCitation":"Lev, S., Landa, E.R., Szlavecz, K., Casey, R., and Snodgrass, J., 2008, Application of synchrotron methods to assess the uptake of roadway-derived Zn by earthworms in an urban soil: Mineralogical Magazine, v. 72, no. 1, p. 191-195, https://doi.org/10.1180/minmag.2008.072.1.191.","productDescription":"5 p.","startPage":"191","endPage":"195","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":213423,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1180/minmag.2008.072.1.191"},{"id":241048,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"72","issue":"1","noUsgsAuthors":false,"publicationDate":"2018-07-05","publicationStatus":"PW","scienceBaseUri":"5059ecb1e4b0c8380cd49428","contributors":{"authors":[{"text":"Lev, S.M.","contributorId":10230,"corporation":false,"usgs":true,"family":"Lev","given":"S.M.","email":"","affiliations":[],"preferred":false,"id":439384,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Landa, E. R.","contributorId":100002,"corporation":false,"usgs":true,"family":"Landa","given":"E.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":439387,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Szlavecz, K.","contributorId":103092,"corporation":false,"usgs":true,"family":"Szlavecz","given":"K.","email":"","affiliations":[],"preferred":false,"id":439388,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Casey, R.","contributorId":87372,"corporation":false,"usgs":true,"family":"Casey","given":"R.","email":"","affiliations":[],"preferred":false,"id":439386,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Snodgrass, J.","contributorId":43576,"corporation":false,"usgs":true,"family":"Snodgrass","given":"J.","email":"","affiliations":[],"preferred":false,"id":439385,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70030296,"text":"70030296 - 2008 - Relative importance of natural disturbances and habitat degradation on snail kite population dynamics","interactions":[],"lastModifiedDate":"2012-03-12T17:21:11","indexId":"70030296","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1497,"text":"Endangered Species Research","active":true,"publicationSubtype":{"id":10}},"title":"Relative importance of natural disturbances and habitat degradation on snail kite population dynamics","docAbstract":"Natural disturbances and habitat degradation are major factors influencing the dynamics and persistence of many wildlife populations, yet few large-scale studies have explored the relative influence of these factors on the dynamics and persistence of animal populations. We used longterm demographic data and matrix population models to examine the potential effects of habitat degradation and natural disturbances on the dynamics of the endangered snail kite Rostrhamus sociabilis in Florida, USA. We found that estimates of stochastic population growth rate were low (0.90). Population growth rate (??) during the first half or our study period (1992 to 1998) was substantially greater than during the second half (1999 to 2005). These 2 periods were characterized by contrasting hydrological conditions. Although ?? was most sensitive to changes in adult survival, the analysis of life table response experiments revealed that a reduction in fertility of kites accounted for >80% of the observed decline in population growth rate. We examined the possibility that the reduction in ?? was caused by (1) habitat degradation due to management, (2) an increase in frequency of moderate drying events in recent years, and (3) both habitat degradation and an increase in frequency of moderate drying events. Our results suggest that both factors could potentially contribute to a large decrease in population growth rate. Our study highlights the importance of simultaneously considering short- and long-term effects of disturbances when modeling population dynamics. Indeed, focusing exclusively on one type of effect may be misleading to both our understanding of the ecological dynamics of the system and to management. The relevance of our results to management is heightened because the snail kite has been selected as a key performance measure of one of the most ambitious ecosystem restoration projects ever undertaken. ?? Inter-Research 2008.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Endangered Species Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.3354/esr00119","issn":"18635","usgsCitation":"Martin, J., Kitchens, W., Cattau, C.E., and Oli, M., 2008, Relative importance of natural disturbances and habitat degradation on snail kite population dynamics: Endangered Species Research, v. 6, no. 1, p. 25-39, https://doi.org/10.3354/esr00119.","startPage":"25","endPage":"39","numberOfPages":"15","costCenters":[],"links":[{"id":476721,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3354/esr00119","text":"Publisher Index Page"},{"id":212118,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3354/esr00119"},{"id":239544,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"6","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aa687e4b0c8380cd84eda","contributors":{"authors":[{"text":"Martin, J.","contributorId":18871,"corporation":false,"usgs":true,"family":"Martin","given":"J.","affiliations":[],"preferred":false,"id":426559,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kitchens, W.M.","contributorId":87647,"corporation":false,"usgs":true,"family":"Kitchens","given":"W.M.","affiliations":[],"preferred":false,"id":426561,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Cattau, Christopher E.","contributorId":54406,"corporation":false,"usgs":true,"family":"Cattau","given":"Christopher","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":426560,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Oli, M.K.","contributorId":108069,"corporation":false,"usgs":true,"family":"Oli","given":"M.K.","affiliations":[],"preferred":false,"id":426562,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70033583,"text":"70033583 - 2008 - Mapping vegetation communities using statistical data fusion in the Ozark National Scenic Riverways, Missouri, USA","interactions":[],"lastModifiedDate":"2018-06-14T09:44:30","indexId":"70033583","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","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":"Mapping vegetation communities using statistical data fusion in the Ozark National Scenic Riverways, Missouri, USA","docAbstract":"<p>A vegetation community map was produced for the Ozark National Scenic Riverways consistent with the association level of the National Vegetation Classification System. Vegetation communities were differentiated using a large array of variables derived from remote sensing and topographic data, which were fused into independent mathematical functions using a discriminant analysis classification approach. Remote sensing data provided variables that discriminated vegetation communities based on differences in color, spectral reflectance, greenness, brightness, and texture. Topographic data facilitated differentiation of vegetation communities based on indirect gradients (e.g., landform position, slope, aspect), which relate to variations in resource and disturbance gradients. Variables derived from these data sources represent both actual and potential vegetation community patterns on the landscape. A hybrid combination of statistical and photointerpretation methods was used to obtain an overall accuracy of 63 percent for a map with 49 vegetation community and land-cover classes, and 78 percent for a 33-class map of the study area.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Photogrammetric Engineering and Remote Sensing","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"American Society for Photogrammetry and Remote Sensing","doi":"10.14358/PERS.74.2.247","issn":"00991112","usgsCitation":"Chastain, R., Struckhoff, M., He, H., and Larsen, D., 2008, Mapping vegetation communities using statistical data fusion in the Ozark National Scenic Riverways, Missouri, USA: Photogrammetric Engineering and Remote Sensing, v. 74, no. 2, p. 247-264, https://doi.org/10.14358/PERS.74.2.247.","productDescription":"18 p.","startPage":"247","endPage":"264","numberOfPages":"18","costCenters":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"links":[{"id":476866,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.14358/pers.74.2.247","text":"Publisher Index Page"},{"id":242156,"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":"505a5090e4b0c8380cd6b790","contributors":{"authors":[{"text":"Chastain, R.A. Jr.","contributorId":51109,"corporation":false,"usgs":true,"family":"Chastain","given":"R.A.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":441534,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Struckhoff, M.A.","contributorId":84985,"corporation":false,"usgs":true,"family":"Struckhoff","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":441536,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"He, H.S.","contributorId":98852,"corporation":false,"usgs":true,"family":"He","given":"H.S.","email":"","affiliations":[],"preferred":false,"id":441537,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Larsen, D.R.","contributorId":56051,"corporation":false,"usgs":true,"family":"Larsen","given":"D.R.","email":"","affiliations":[],"preferred":false,"id":441535,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70033587,"text":"70033587 - 2008 - Collaboration tools and techniques for large model datasets","interactions":[],"lastModifiedDate":"2017-08-23T12:24:46","indexId":"70033587","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2381,"text":"Journal of Marine Systems","active":true,"publicationSubtype":{"id":10}},"title":"Collaboration tools and techniques for large model datasets","docAbstract":"In MREA and many other marine applications, it is common to have multiple models running with different grids, run by different institutions. Techniques and tools are described for low-bandwidth delivery of data from large multidimensional datasets, such as those from meteorological and oceanographic models, directly into generic analysis and visualization tools. Output is stored using the NetCDF CF Metadata Conventions, and then delivered to collaborators over the web via OPeNDAP. OPeNDAP datasets served by different institutions are then organized via THREDDS catalogs. Tools and procedures are then used which enable scientists to explore data on the original model grids using tools they are familiar with. It is also low-bandwidth, enabling users to extract just the data they require, an important feature for access from ship or remote areas. The entire implementation is simple enough to be handled by modelers working with their webmasters - no advanced programming support is necessary. ?? 2007 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Marine Systems","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jmarsys.2007.02.013","issn":"09247963","usgsCitation":"Signell, R.P., Carniel, S., Chiggiato, J., Janekovic, I., Pullen, J., and Sherwood, C.R., 2008, Collaboration tools and techniques for large model datasets: Journal of Marine Systems, v. 69, no. 1-2, p. 154-161, https://doi.org/10.1016/j.jmarsys.2007.02.013.","productDescription":"8 p.","startPage":"154","endPage":"161","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":476753,"rank":1,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://hdl.handle.net/1912/2050","text":"External Repository"},{"id":242220,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"69","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f7abe4b0c8380cd4cc3d","contributors":{"authors":[{"text":"Signell, R. P.","contributorId":89147,"corporation":false,"usgs":true,"family":"Signell","given":"R.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":441567,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Carniel, S.","contributorId":47504,"corporation":false,"usgs":true,"family":"Carniel","given":"S.","email":"","affiliations":[],"preferred":false,"id":441564,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Chiggiato, J.","contributorId":47065,"corporation":false,"usgs":true,"family":"Chiggiato","given":"J.","affiliations":[],"preferred":false,"id":441563,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Janekovic, I.","contributorId":69796,"corporation":false,"usgs":true,"family":"Janekovic","given":"I.","email":"","affiliations":[],"preferred":false,"id":441566,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Pullen, J.","contributorId":34339,"corporation":false,"usgs":true,"family":"Pullen","given":"J.","email":"","affiliations":[],"preferred":false,"id":441562,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Sherwood, C. R.","contributorId":48235,"corporation":false,"usgs":true,"family":"Sherwood","given":"C.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":441565,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70033590,"text":"70033590 - 2008 - Influence of landscape structure on reef fish assemblages","interactions":[],"lastModifiedDate":"2012-03-12T17:21:27","indexId":"70033590","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2602,"text":"Landscape Ecology","active":true,"publicationSubtype":{"id":10}},"title":"Influence of landscape structure on reef fish assemblages","docAbstract":"Management of tropical marine environments calls for interdisciplinary studies and innovative methodologies that consider processes occurring over broad spatial scales. We investigated relationships between landscape structure and reef fish assemblage structure in the US Virgin Islands. Measures of landscape structure were transformed into a reduced set of composite indices using principal component analyses (PCA) to synthesize data on the spatial patterning of the landscape structure of the study reefs. However, composite indices (e.g., habitat diversity) were not particularly informative for predicting reef fish assemblage structure. Rather, relationships were interpreted more easily when functional groups of fishes were related to individual habitat features. In particular, multiple reef fish parameters were strongly associated with reef context. Fishes responded to benthic habitat structure at multiple spatial scales, with various groups of fishes each correlated to a unique suite of variables. Accordingly, future experiments should be designed to test functional relationships based on the ecology of the organisms of interest. Our study demonstrates that landscape-scale habitat features influence reef fish communities, illustrating promise in applying a landscape ecology approach to better understand factors that structure coral reef ecosystems. Furthermore, our findings may prove useful in design of spatially-based conservation approaches such as marine protected areas (MPAs), because landscape-scale metrics may serve as proxies for areas with high species diversity and abundance within the coral reef landscape. ?? 2007 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Landscape Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10980-007-9147-x","issn":"09212973","usgsCitation":"Grober-Dunsmore, R., Frazer, T., Beets, J., Lindberg, W., Zwick, P., and Funicelli, N., 2008, Influence of landscape structure on reef fish assemblages: Landscape Ecology, v. 23, no. SUPPL. 1, p. 37-53, https://doi.org/10.1007/s10980-007-9147-x.","startPage":"37","endPage":"53","numberOfPages":"17","costCenters":[],"links":[{"id":214550,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10980-007-9147-x"},{"id":242285,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"SUPPL. 1","noUsgsAuthors":false,"publicationDate":"2007-09-06","publicationStatus":"PW","scienceBaseUri":"505a3b4ae4b0c8380cd623cf","contributors":{"authors":[{"text":"Grober-Dunsmore, R.","contributorId":58797,"corporation":false,"usgs":true,"family":"Grober-Dunsmore","given":"R.","email":"","affiliations":[],"preferred":false,"id":441581,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Frazer, T.K.","contributorId":10215,"corporation":false,"usgs":true,"family":"Frazer","given":"T.K.","email":"","affiliations":[],"preferred":false,"id":441577,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Beets, J.P.","contributorId":92503,"corporation":false,"usgs":true,"family":"Beets","given":"J.P.","email":"","affiliations":[],"preferred":false,"id":441582,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lindberg, W.J.","contributorId":33134,"corporation":false,"usgs":true,"family":"Lindberg","given":"W.J.","email":"","affiliations":[],"preferred":false,"id":441579,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Zwick, P.","contributorId":52804,"corporation":false,"usgs":true,"family":"Zwick","given":"P.","affiliations":[],"preferred":false,"id":441580,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Funicelli, N.A.","contributorId":13573,"corporation":false,"usgs":true,"family":"Funicelli","given":"N.A.","email":"","affiliations":[],"preferred":false,"id":441578,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70033591,"text":"70033591 - 2008 - Textural, mineralogical and stable isotope studies of hydrothermal alteration in the main sulfide zone of the Great Dyke, Zimbabwe and the precious metals zone of the Sonju Lake Intrusion, Minnesota, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:27","indexId":"70033591","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2746,"text":"Mineralium Deposita","active":true,"publicationSubtype":{"id":10}},"title":"Textural, mineralogical and stable isotope studies of hydrothermal alteration in the main sulfide zone of the Great Dyke, Zimbabwe and the precious metals zone of the Sonju Lake Intrusion, Minnesota, USA","docAbstract":"Stratigraphic offsets in the peak concentrations of platinum-group elements (PGE) and base-metal sulfides in the main sulfide zone of the Great Dyke and the precious metals zone of the Sonju Lake Intrusion have, in part, been attributed to the interaction between magmatic PGE-bearing base-metal sulfide assemblages and hydrothermal fluids. In this paper, we provide mineralogical and textural evidence that indicates alteration of base-metal sulfides and mobilization of metals and S during hydrothermal alteration in both mineralized intrusions. Stable isotopic data suggest that the fluids involved in the alteration were of magmatic origin in the Great Dyke but that a meteoric water component was involved in the alteration of the Sonju Lake Intrusion. The strong spatial association of platinum-group minerals, principally Pt and Pd sulfides, arsenides, and tellurides, with base-metal sulfide assemblages in the main sulfide zone of the Great Dyke is consistent with residual enrichment of Pt and Pd during hydrothermal alteration. However, such an interpretation is more tenuous for the precious metals zone of the Sonju Lake Intrusion where important Pt and Pd arsenides and antimonides occur as inclusions within individual plagioclase crystals and within alteration assemblages that are free of base-metal sulfides. Our observations suggest that Pt and Pd tellurides, antimonides, and arsenides may form during both magmatic crystallization and subsolidus hydrothermal alteration. Experimental studies of magmatic crystallization and hydrothermal transport/deposition in systems involving arsenides, tellurides, antimonides, and base metal sulfides are needed to better understand the relative importance of magmatic and hydrothermal processes in controlling the distribution of PGE in mineralized layered intrusions of this type. ?? Springer-Verlag 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Mineralium Deposita","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s00126-007-0159-x","issn":"00264598","usgsCitation":"Li, C., Ripley, E., Oberthur, T., Miller, J., and Joslin, G., 2008, Textural, mineralogical and stable isotope studies of hydrothermal alteration in the main sulfide zone of the Great Dyke, Zimbabwe and the precious metals zone of the Sonju Lake Intrusion, Minnesota, USA: Mineralium Deposita, v. 43, no. 1, p. 97-110, https://doi.org/10.1007/s00126-007-0159-x.","startPage":"97","endPage":"110","numberOfPages":"14","costCenters":[],"links":[{"id":214551,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s00126-007-0159-x"},{"id":242286,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"43","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-08-10","publicationStatus":"PW","scienceBaseUri":"505ba602e4b08c986b320e13","contributors":{"authors":[{"text":"Li, C.","contributorId":14954,"corporation":false,"usgs":true,"family":"Li","given":"C.","email":"","affiliations":[],"preferred":false,"id":441583,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ripley, E.M.","contributorId":20080,"corporation":false,"usgs":true,"family":"Ripley","given":"E.M.","email":"","affiliations":[],"preferred":false,"id":441585,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Oberthur, T.","contributorId":76957,"corporation":false,"usgs":true,"family":"Oberthur","given":"T.","email":"","affiliations":[],"preferred":false,"id":441586,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Miller, J.D. Jr.","contributorId":18919,"corporation":false,"usgs":true,"family":"Miller","given":"J.D.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":441584,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Joslin, G.D.","contributorId":80500,"corporation":false,"usgs":true,"family":"Joslin","given":"G.D.","email":"","affiliations":[],"preferred":false,"id":441587,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70033595,"text":"70033595 - 2008 - Evaluation of an index of biotic integrity approach used to assess biological condition in western U.S. streams and rivers at varying spatial scales","interactions":[],"lastModifiedDate":"2012-03-12T17:21:30","indexId":"70033595","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3624,"text":"Transactions of the American Fisheries Society","active":true,"publicationSubtype":{"id":10}},"title":"Evaluation of an index of biotic integrity approach used to assess biological condition in western U.S. streams and rivers at varying spatial scales","docAbstract":"Consistent assessments of biological condition are needed across multiple ecoregions to provide a greater understanding of the spatial extent of environmental degradation. However, consistent assessments at large geographic scales are often hampered by lack of uniformity in data collection, analyses, and interpretation. The index of biotic integrity (IBI) has been widely used in eastern and central North America, where fish assemblages are complex and largely composed of native species, but IBI development has been hindered in the western United States because of relatively low fish species richness and greater relative abundance of alien fishes. Approaches to developing IBIs rarely provide a consistent means of assessing biological condition across multiple ecoregions. We conducted an evaluation of IBIs recently proposed for three ecoregions of the western United States using an independent data set covering a large geographic scale. We standardized the regional IBIs and developed biological condition criteria, assessed the responsiveness of IBIs to basin-level land uses, and assessed their precision and concordance with basin-scale IBIs. Standardized IBI scores from 318 sites in the western United States comprising mountain, plains, and xeric ecoregions were significantly related to combined urban and agricultural land uses. Standard deviations and coefficients of variation revealed relatively low variation in IBI scores based on multiple sampling reaches at sites. A relatively high degree of corroboration with independent, locally developed IBIs indicates that the regional IBIs are robust across large geographic scales, providing precise and accurate assessments of biological condition for western U.S. streams. ?? Copyright by the American Fisheries Society 2008.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Transactions of the American Fisheries Society","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1577/T07-054.1","issn":"00028487","usgsCitation":"Meador, M.R., Whittier, T., Goldstein, R.M., Hughes, R.M., and Peck, D., 2008, Evaluation of an index of biotic integrity approach used to assess biological condition in western U.S. streams and rivers at varying spatial scales: Transactions of the American Fisheries Society, v. 137, no. 1, p. 13-22, https://doi.org/10.1577/T07-054.1.","startPage":"13","endPage":"22","numberOfPages":"10","costCenters":[],"links":[{"id":214132,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/T07-054.1"},{"id":241826,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"137","issue":"1","noUsgsAuthors":false,"publicationDate":"2011-01-09","publicationStatus":"PW","scienceBaseUri":"505a0c46e4b0c8380cd52ae7","contributors":{"authors":[{"text":"Meador, M. R.","contributorId":74400,"corporation":false,"usgs":true,"family":"Meador","given":"M.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":441596,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Whittier, T.R.","contributorId":55296,"corporation":false,"usgs":true,"family":"Whittier","given":"T.R.","email":"","affiliations":[],"preferred":false,"id":441593,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Goldstein, R. M.","contributorId":98305,"corporation":false,"usgs":true,"family":"Goldstein","given":"R.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":441597,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hughes, R. M.","contributorId":69997,"corporation":false,"usgs":true,"family":"Hughes","given":"R.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":441595,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Peck, D.V.","contributorId":68053,"corporation":false,"usgs":true,"family":"Peck","given":"D.V.","email":"","affiliations":[],"preferred":false,"id":441594,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031762,"text":"70031762 - 2008 - Modeling multi-layer effects in passive microwave remote sensing of dry snow using Dense Media Radiative Transfer Theory (DMRT) based on quasicrystalline approximation","interactions":[],"lastModifiedDate":"2012-03-12T17:21:11","indexId":"70031762","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Modeling multi-layer effects in passive microwave remote sensing of dry snow using Dense Media Radiative Transfer Theory (DMRT) based on quasicrystalline approximation","docAbstract":"The Dense Media Radiative Transfer theory (DMRT) of Quasicrystalline Approximation of Mie scattering by sticky particles is used to study the multiple scattering effects in layered snow in microwave remote sensing. Results are illustrated for various snow profile characteristics. Polarization differences and frequency dependences of multilayer snow model are significantly different from that of the single-layer snow model. Comparisons are also made with CLPX data using snow parameters as given by the VIC model. ?? 2007 IEEE.","largerWorkTitle":"International Geoscience and Remote Sensing Symposium (IGARSS)","conferenceTitle":"2007 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2007","conferenceDate":"23 June 2007 through 28 June 2007","conferenceLocation":"Barcelona","language":"English","doi":"10.1109/IGARSS.2007.4423024","isbn":"1424412129; 9781424412129","usgsCitation":"Liang, D., Xu, X., Tsang, L., Andreadis, K., and Josberger, E., 2008, Modeling multi-layer effects in passive microwave remote sensing of dry snow using Dense Media Radiative Transfer Theory (DMRT) based on quasicrystalline approximation, <i>in</i> International Geoscience and Remote Sensing Symposium (IGARSS), Barcelona, 23 June 2007 through 28 June 2007, p. 1215-1218, https://doi.org/10.1109/IGARSS.2007.4423024.","startPage":"1215","endPage":"1218","numberOfPages":"4","costCenters":[],"links":[{"id":212518,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1109/IGARSS.2007.4423024"},{"id":240013,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5c0de4b0c8380cd6f9c3","contributors":{"authors":[{"text":"Liang, D.","contributorId":66483,"corporation":false,"usgs":true,"family":"Liang","given":"D.","email":"","affiliations":[],"preferred":false,"id":433017,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Xu, X.","contributorId":55166,"corporation":false,"usgs":true,"family":"Xu","given":"X.","email":"","affiliations":[],"preferred":false,"id":433015,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Tsang, L.","contributorId":43950,"corporation":false,"usgs":true,"family":"Tsang","given":"L.","email":"","affiliations":[],"preferred":false,"id":433014,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Andreadis, K.M.","contributorId":8294,"corporation":false,"usgs":true,"family":"Andreadis","given":"K.M.","email":"","affiliations":[],"preferred":false,"id":433013,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Josberger, E.G.","contributorId":61161,"corporation":false,"usgs":true,"family":"Josberger","given":"E.G.","email":"","affiliations":[],"preferred":false,"id":433016,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70033066,"text":"70033066 - 2008 - Alien dominance of the parasitoid wasp community along an elevation gradient on Hawai'i Island","interactions":[],"lastModifiedDate":"2012-03-12T17:21:37","indexId":"70033066","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1018,"text":"Biological Invasions","active":true,"publicationSubtype":{"id":10}},"title":"Alien dominance of the parasitoid wasp community along an elevation gradient on Hawai'i Island","docAbstract":"Through intentional and accidental introduction, more than 100 species of alien Ichneumonidae and Braconidae (Hymenoptera) have become established in the Hawaiian Islands. The extent to which these parasitoid wasps have penetrated native wet forests was investigated over a 1,765 m elevation gradient on windward Hawai'i Island. For >1 year, malaise traps were used to continuously monitor parasitoid abundance and species richness in nine sites over three elevations. A total of 18,996 individuals from 16 subfamilies were collected. Overall, the fauna was dominated by aliens, with 44 of 58 species foreign to the Hawaiian Islands. Ichneumonidae was dominant over Braconidae in terms of both diversity and abundance, comprising 67.5% of individuals and 69.0% of species collected. Parasitoid abundance and species richness varied significantly with elevation: abundance was greater at mid and high elevations compared to low elevation while species richness increased with increasing elevation, with all three elevations differing significantly from each other. Nine species purposely introduced to control pest insects were found, but one braconid, Meteorus laphygmae, comprised 98.0% of this assemblage, or 28.3% of the entire fauna. Endemic species, primarily within the genera Spolas and Enicospilus, were collected almost exclusively at mid- and high-elevation sites, where they made up 22.1% and 36.0% of the total catch, respectively. Overall, 75.9% of species and 96.0% of individuals are inferred to parasitize Lepidoptera larvae and pupae. Our results support previous data indicating that alien parasitoids have deeply penetrated native forest habitats and may have substantial impacts on Hawaiian ecosystems. ?? 2008 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Biological Invasions","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10530-008-9218-1","issn":"13873","usgsCitation":"Peck, R., Banko, P., Schwarzfeld, M., Euaparadorn, M., and Brinck, K., 2008, Alien dominance of the parasitoid wasp community along an elevation gradient on Hawai'i Island: Biological Invasions, v. 10, no. 8, p. 1441-1455, https://doi.org/10.1007/s10530-008-9218-1.","startPage":"1441","endPage":"1455","numberOfPages":"15","costCenters":[],"links":[{"id":213420,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10530-008-9218-1"},{"id":241044,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"10","issue":"8","noUsgsAuthors":false,"publicationDate":"2008-02-06","publicationStatus":"PW","scienceBaseUri":"5059e962e4b0c8380cd4823a","contributors":{"authors":[{"text":"Peck, R.W.","contributorId":96076,"corporation":false,"usgs":true,"family":"Peck","given":"R.W.","email":"","affiliations":[],"preferred":false,"id":439235,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Banko, P.C. 0000-0002-6035-9803","orcid":"https://orcid.org/0000-0002-6035-9803","contributorId":99531,"corporation":false,"usgs":true,"family":"Banko","given":"P.C.","affiliations":[],"preferred":false,"id":439236,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Schwarzfeld, M.","contributorId":95693,"corporation":false,"usgs":true,"family":"Schwarzfeld","given":"M.","affiliations":[],"preferred":false,"id":439234,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Euaparadorn, M.","contributorId":56448,"corporation":false,"usgs":true,"family":"Euaparadorn","given":"M.","affiliations":[],"preferred":false,"id":439233,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Brinck, K.W.","contributorId":25763,"corporation":false,"usgs":true,"family":"Brinck","given":"K.W.","affiliations":[],"preferred":false,"id":439232,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70032050,"text":"70032050 - 2008 - Survival of cool and warm freshwater fish following chloramine-T exposure","interactions":[],"lastModifiedDate":"2012-03-12T17:21:28","indexId":"70032050","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":853,"text":"Aquaculture","active":true,"publicationSubtype":{"id":10}},"title":"Survival of cool and warm freshwater fish following chloramine-T exposure","docAbstract":"Chloramine-T is presently available in the USA to control mortalities associated with bacterial gill disease or external columnaris only through an Investigational New Animal Drug Permit authorized by the US Food and Drug Administration (FDA). Its US approval hinges on FDA's acceptance of several key data, including those describing animal safety. Chloramine-T is presently applied in US aquaculture, by permit only, once daily on consecutive or alternate days for 1??h at 10 to 20??mg/L to control mortalities associated with bacterial gill disease or external columnaris. Our objective was to determine the safety of chloramine-T bath exposures at multiples of the proposed maximum treatment concentration (i.e., 0, 20, 60, 100, and 200??mg/L) administered on four consecutive days at 20????C to lake sturgeon Acipenser fulvescens, northern pike Esox lucius, and walleye Sander vitreum, or at 27????C to channel catfish Ictalurus punctatus, and largemouth bass Micropterus salmoides. All fish were tested as five to eight week old fry except for walleye and channel catfish which were tested as both fry and fingerling (fingerlings were at least four weeks older than the fry tested). Walleye and channel catfish were selected to evaluate the effects of life stage (fry vs. fingerling), temperature (walleye - 15, 20, or 25????C; channel catfish - 22, 27, or 32????C), exposure duration (60 vs. 180??min), and water chemistry (walleye only - reconstituted soft water vs. well water). Except for channel catfish fry, survival was significantly reduced only when fish were treated at 100 or 200??mg/L. Channel catfish fry survival was significantly reduced when exposed at 60??mg/L for 180??min at 27????C. Based on our mortality data, chloramine-T administered once daily for 60??min on four consecutive days at concentrations of up to 20??mg/L is not likely to adversely affect survival of cool or warmwater fish cultured in freshwater. Crown Copyright ?? 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Aquaculture","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.aquaculture.2007.12.017","issn":"00448486","usgsCitation":"Gaikowski, M., Larson, W., and Gingerich, W., 2008, Survival of cool and warm freshwater fish following chloramine-T exposure: Aquaculture, v. 275, no. 1-4, p. 20-25, https://doi.org/10.1016/j.aquaculture.2007.12.017.","startPage":"20","endPage":"25","numberOfPages":"6","costCenters":[],"links":[{"id":214716,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.aquaculture.2007.12.017"},{"id":242465,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"275","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba2cae4b08c986b31f97a","contributors":{"authors":[{"text":"Gaikowski, M.P. 0000-0002-6507-9341","orcid":"https://orcid.org/0000-0002-6507-9341","contributorId":51685,"corporation":false,"usgs":true,"family":"Gaikowski","given":"M.P.","affiliations":[],"preferred":false,"id":434318,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Larson, W.J.","contributorId":83489,"corporation":false,"usgs":true,"family":"Larson","given":"W.J.","email":"","affiliations":[],"preferred":false,"id":434320,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gingerich, W.H.","contributorId":83481,"corporation":false,"usgs":true,"family":"Gingerich","given":"W.H.","email":"","affiliations":[],"preferred":false,"id":434319,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030263,"text":"70030263 - 2008 - The Ellsworth terrane, coastal Maine: Geochronology, geochemistry, and Nd-Pb isotopic composition - Implications for the rifting of Ganderia","interactions":[],"lastModifiedDate":"2012-03-12T17:21:11","indexId":"70030263","displayToPublicDate":"2008-01-01T00:00:00","publicationYear":"2008","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"The Ellsworth terrane, coastal Maine: Geochronology, geochemistry, and Nd-Pb isotopic composition - Implications for the rifting of Ganderia","docAbstract":"The Ellsworth terrane is one of a number of fault-bounded blocks that occur along the eastern margin of Ganderia, the western-most of the peri-Gondwanan domains in the northern Appalachians that were accreted to Laurentia in the Paleozoic. Geologic relations, detrital zircon ages, and basalt geochemistry suggest that the Ellsworth terrane is part of Ganderia and not an exotic terrane. In the Penobscot Bay area of coastal Maine, the Ellsworth terrane is dominantly composed of bimodal basalt-rhyolite volcanic sequences of the Ellsworth Schist and unconformably overlying Castine Volcanics. We use new U-Pb zircon geochronology, geochemistry, and Nd and Pb isotopes for these volcanic sequences to constrain the petrogenetic history and paleotectonic setting of the Ellsworth terrane and its relationship with Ganderia. U-Pb zircon geochronology for rhyolites indicates that both the Ellsworth Schist (508.6 ?? 0.8 Ma) and overlying Castine Volcanics (503.5 ?? 2.5 Ma) are Middle Cambrian in age. Two tholefitic basalt types are recognized. Type Tb-1 basalt, present as pillowed and massive lava flows and as sills in both units, has depleted La and Ce ([La/Nd]N = 0.53-0.87) values, flat heavy rare earth element (REE) values, and no positive Th or negative Ta anomalies on primitive mantle-normalized diagrams. In contrast, type Th-2 basalt, present only in the Castine Volcanics, has stightly enriched LREE ([La/Yb]N = 1.42-2.92) values and no Th or Th anomalies. Both basalt types have strongly positive ??Nd (500) values (Th-1 = +7.9-+8.6; Th-2 = +5.6-+7.0) and relatively enriched Pb isotopic compositions (206Ph/204Pb = 18.037-19.784; 207/204Pb = 15.531-15.660; 2088Pb/204Pb = 37.810-38.817). The basalts have compositions transitional between recent normal and enriched mid-ocean-ridge basalt, and they were probably derived by partial melting of compositionatly heterogeneous asthenosphenc mantle. Two types of rhyolite also are present. Type R-1 rhyolite, which mostly occurs as tuffs interlayered with basalt in the Ellsworth Schist, is calc-alkaline and characterized by relatively low REE, Zr, and Hf contents, enriched LREE ([La/Yb]N ???3-6), positive Th and negative Th anomalies, ??Nd (500) values near zero (+0.5 to -0.9), and relatively unradiogenic Ph isotope values (206Pb/204Pb = 18.845; 207Pb/ 204Pb = 15.625; 208Pb/204Pb = 38.626). The data suggest that R-1 rhyolite magma was Likely derived by mixing of basalt with melts from a relatively depleted crustal source. Type R-2 rhyolite, which mostly occurs as lava flows and domes in the Castine volcanics, is tholeiitic and characterized by enriched REE with flat patterns ([La/Yb]N = 1-2.5), moderate negative Eu anomalies (Eu/Eu* = 0-34.5), enriched Th, small negative Th anomalies, and ??Nd (500) (+5.8-+7.5) and Ph isotope (206Pb/204Pb = 19.175-19.619; 207Pb/204Pb = 15.605--15.649; 208Pb/204Pb = 38.834-38.851) values that overlap those of the tholeiitic basalts. The data suggest that R-2 rhyolite magma was derived by the partial melting of hydrothermally altered basalt with the addition of a small amount of an enriched component, probably R-1 rhyolite. The geololic, geochemicai, and isotopic characteristics of the bimodal volcanic sequences strongly suggest that the Ellsworth terrane did not evolve as an extensional back-arc basin behind an active arc, but rather it evolved as a proto-oceanic rift petrogenetically similar to Cenozoic rifts like the Gulf of California-Salton mrough and Red Sea-Gulf of Aden rift systems. Such a setting is supported by the presence of serpentinized mantle and zinc-copper-rich massive sulfide deposits in the Ellsworth terrane. We conclude that the Ellsworth terrane developed as a Mid","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geological Society of America Bulletin","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/B26336.1","issn":"00167","usgsCitation":"Schulz, K.J., Stewart, D.B., Tucker, R.D., Pollock, J., and Ayuso, R., 2008, The Ellsworth terrane, coastal Maine: Geochronology, geochemistry, and Nd-Pb isotopic composition - Implications for the rifting of Ganderia: Geological Society of America Bulletin, v. 120, no. 9-10, p. 1134-1158, https://doi.org/10.1130/B26336.1.","startPage":"1134","endPage":"1158","numberOfPages":"25","costCenters":[],"links":[{"id":239506,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212088,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/B26336.1"}],"volume":"120","issue":"9-10","noUsgsAuthors":false,"publicationDate":"2008-09-04","publicationStatus":"PW","scienceBaseUri":"505ba719e4b08c986b321367","contributors":{"authors":[{"text":"Schulz, K. J.","contributorId":79131,"corporation":false,"usgs":true,"family":"Schulz","given":"K.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":426372,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stewart, D. B.","contributorId":41809,"corporation":false,"usgs":true,"family":"Stewart","given":"D.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":426370,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Tucker, R. D.","contributorId":43409,"corporation":false,"usgs":false,"family":"Tucker","given":"R.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":426371,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Pollock, J.C.","contributorId":107496,"corporation":false,"usgs":true,"family":"Pollock","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":426373,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ayuso, R. A. 0000-0002-8496-9534","orcid":"https://orcid.org/0000-0002-8496-9534","contributorId":27079,"corporation":false,"usgs":true,"family":"Ayuso","given":"R. A.","affiliations":[],"preferred":false,"id":426369,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
]}