{"pageNumber":"2334","pageRowStart":"58325","pageSize":"25","recordCount":184617,"records":[{"id":70031390,"text":"70031390 - 2007 - Summer microhabitat use of fluvial bull trout in Eastern Oregon streams","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70031390","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2886,"text":"North American Journal of Fisheries Management","active":true,"publicationSubtype":{"id":10}},"title":"Summer microhabitat use of fluvial bull trout in Eastern Oregon streams","docAbstract":"The management and recovery of populations of bull trout Salvelinus confluentus requires a comprehensive understanding of habitat use across different systems, life stages, and life history forms. To address these needs, we collected microhabitat use and availability data in three fluvial populations of bull trout in eastern Oregon. We evaluated diel differences in microhabitat use, the consistency of microhabitat use across systems and size-classes based on preference, and our ability to predict bull trout microhabitat use. Diel comparisons suggested bull trout continue to use deeper microhabitats with cover but shift into significantly slower habitats during nighttime periods; however, we observed no discrete differences in substrate use patterns across diel periods. Across life stages, we found that both juvenile and adult bull trout used slow-velocity microhabitats with cover, but the use of specific types varied. Both logistic regression and habitat preference analyses suggested that adult bull trout used deeper habitats than juveniles. Habitat preference analyses suggested that bull trout habitat use was consistent across all three systems, as chi-square tests rejected the null hypotheses that microhabitats were used in proportion to those available (P < 0.0001). Validation analyses indicated that the logistic regression models (juvenile and adult) were effective at predicting bull trout absence across all tests (specificity values = 100%); however, our ability to accurately predict bull trout absence was limited (sensitivity values = 0% across all tests). Our results highlight the limitations of the models used to predict microhabitat use for fish species like bull trout, which occur at naturally low densities. However, our results also demonstrate that bull trout microhabitat use patterns are generally consistent across systems, a pattern that parallels observations at both similar and larger scales and across life history forms. Thus, our results, in combination with previous bull trout habitat studies, provide managers with benchmarks for restoration in highly degraded systems.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"North American Journal of Fisheries Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1577/M06-154.1","issn":"02755947","usgsCitation":"Al-Chokhachy, R., and Budy, P., 2007, Summer microhabitat use of fluvial bull trout in Eastern Oregon streams: North American Journal of Fisheries Management, v. 27, no. 4, p. 1068-1081, https://doi.org/10.1577/M06-154.1.","startPage":"1068","endPage":"1081","numberOfPages":"14","costCenters":[],"links":[{"id":212618,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/M06-154.1"},{"id":240132,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-11-01","publicationStatus":"PW","scienceBaseUri":"505b9f3ee4b08c986b31e430","contributors":{"authors":[{"text":"Al-Chokhachy, R.","contributorId":42431,"corporation":false,"usgs":true,"family":"Al-Chokhachy","given":"R.","affiliations":[],"preferred":false,"id":431300,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Budy, P.","contributorId":68091,"corporation":false,"usgs":true,"family":"Budy","given":"P.","affiliations":[],"preferred":false,"id":431301,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031389,"text":"70031389 - 2007 - Magnesium and calcium sulfate stabilities and the water budget of Mars","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70031389","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2317,"text":"Journal of Geophysical Research E: Planets","active":true,"publicationSubtype":{"id":10}},"title":"Magnesium and calcium sulfate stabilities and the water budget of Mars","docAbstract":"Magnesium sulfate probably plays a dominant role in the water cycle of Mars away from the polar ice caps through hydration and dehydration reactions. This prominence is due to its abundance, its occurrence in numerous hydration states, and its ability to hydrate and dehydrate rapidly. New experimental studies on the metastable reaction between hexahydrite (MgSO4??6H2O) and starkeyite (MgSO4-4H2O) as a function of temperature and relative humidity, supplemented by recent investigations of the stable reaction between epsomite (MgSO4??7H2O) and hexahydrite and by phase equilibrium calculations, suggest that the most important magnesium sulfate phases involved in the Martian water cycle are MgSO4??11 H2O, epsomite, starkeyite, and possibly kieserite (MgSO4??H2O). Hexahydrite is not predicted to be stable on the surface of Mars. During diurnal variations in temperature and relative humidity, 1 kg of MgSO4 can release or remove from the atmosphere 1.5 kg of H2O by cycling between kieserite and MgSO4??11 H2O. Despite subequal abundances of calcium sulfate, calcium sulfates are not likely to be important in the water cycle of the planet because of sluggish rates of hydration and dehydration and a more limited range of H2O concentrations per kilogram of CaSO4 (0.00 to 0.26 kg kg-1). Modern or recent erosion on Mars attributed to liquid water may be due to the dehydration Of MgSO4??11 H2O because of the inferred abundance and likelihood of occurrence of this phase and its limited stability relative to known variations in temperature and relative humidity.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research E: Planets","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2007JE002898","issn":"01480227","usgsCitation":"Chou, I., and Seal, R., 2007, Magnesium and calcium sulfate stabilities and the water budget of Mars: Journal of Geophysical Research E: Planets, v. 112, no. 11, https://doi.org/10.1029/2007JE002898.","costCenters":[],"links":[{"id":477118,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2007je002898","text":"Publisher Index Page"},{"id":212590,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2007JE002898"},{"id":240096,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"112","issue":"11","noUsgsAuthors":false,"publicationDate":"2007-11-08","publicationStatus":"PW","scienceBaseUri":"505a4b57e4b0c8380cd69489","contributors":{"authors":[{"text":"Chou, I.-M. 0000-0001-5233-6479","orcid":"https://orcid.org/0000-0001-5233-6479","contributorId":44283,"corporation":false,"usgs":true,"family":"Chou","given":"I.-M.","affiliations":[{"id":245,"text":"Eastern Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":false,"id":431298,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Seal, R.R. II","contributorId":102097,"corporation":false,"usgs":true,"family":"Seal","given":"R.R.","suffix":"II","email":"","affiliations":[],"preferred":false,"id":431299,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031388,"text":"70031388 - 2007 - Cleats and their relation to geologic lineaments and coalbed methane potential in Pennsylvanian coals in Indiana","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70031388","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2033,"text":"International Journal of Coal Geology","active":true,"publicationSubtype":{"id":10}},"title":"Cleats and their relation to geologic lineaments and coalbed methane potential in Pennsylvanian coals in Indiana","docAbstract":"Cleats and fractures in Pennsylvanian coals in southwestern Indiana were described, statistically analyzed, and subsequently interpreted in terms of their origin, relation to geologic lineaments, and significance for coal permeability and coalbed gas generation and storage. These cleats can be interpreted as the result of superimposed endogenic and exogenic processes. Endogenic processes are associated with coalification (i.e., matrix dehydration and shrinkage), while exogenic processes are mainly associated with larger-scale phenomena, such as tectonic stress. At least two distinct generations of cleats were identified on the basis of field reconnaissance and microscopic study: a first generation of cleats that developed early on during coalification and a second generation that cuts through the previous one at an angle that mimics the orientation of the present-day stress field. The observed parallelism between early-formed cleats and mapped lineaments suggests a well-established tectonic control during early cleat formation. Authigenic minerals filling early cleats represent the vestiges of once open hydrologic regimes. The second generation of cleats is characterized by less prominent features (i.e., smaller apertures) with a much less pronounced occurrence of authigenic mineralization. Our findings suggest a multistage development of cleats that resulted from tectonic stress regimes that changed orientation during coalification and basin evolution. The coals studied are characterized by a macrocleat distribution similar to that of well-developed coalbed methane basins (e.g., Black Warrior Basin, Alabama). Scatter plots and regression analyses of meso- and microcleats reveal a power-law distribution between spacing and cleat aperture. The same distribution was observed for fractures at microscopic scale. Our observations suggest that microcleats enhance permeability by providing additional paths for migration of gas out of the coal matrix, in addition to providing access for methanogenic bacteria. The abundance, distribution, and orientation of cleats control coal fabric and are crucial features in all stages of coalbed gas operations (i.e., exploration and production). Understanding coal fabric is important for coal gas exploration as it may be related to groundwater migration and the occurrence of methanogenic bacteria, prerequisite to biogenic gas accumulations. Likewise, the distribution of cleats in coal also determines pathways for migration and accumulation of thermogenic gas generated during coalification. ?? 2007 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"International Journal of Coal Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.coal.2007.02.004","issn":"01665162","usgsCitation":"Solano-Acosta, W., Mastalerz, M., and Schimmelmann, A., 2007, Cleats and their relation to geologic lineaments and coalbed methane potential in Pennsylvanian coals in Indiana: International Journal of Coal Geology, v. 72, no. 3-4, p. 187-208, https://doi.org/10.1016/j.coal.2007.02.004.","startPage":"187","endPage":"208","numberOfPages":"22","costCenters":[],"links":[{"id":212589,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.coal.2007.02.004"},{"id":240095,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"72","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f643e4b0c8380cd4c643","contributors":{"authors":[{"text":"Solano-Acosta, W.","contributorId":29212,"corporation":false,"usgs":true,"family":"Solano-Acosta","given":"W.","email":"","affiliations":[],"preferred":false,"id":431296,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mastalerz, Maria","contributorId":78065,"corporation":false,"usgs":true,"family":"Mastalerz","given":"Maria","affiliations":[],"preferred":false,"id":431297,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Schimmelmann, A.","contributorId":28348,"corporation":false,"usgs":false,"family":"Schimmelmann","given":"A.","affiliations":[],"preferred":false,"id":431295,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031382,"text":"70031382 - 2007 - Landward and eastward shift of Alaskan polar bear denning associated with recent sea ice changes","interactions":[],"lastModifiedDate":"2018-05-13T12:23:39","indexId":"70031382","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3093,"text":"Polar Biology","active":true,"publicationSubtype":{"id":10}},"title":"Landward and eastward shift of Alaskan polar bear denning associated with recent sea ice changes","docAbstract":"<p><span>Polar bears&nbsp;</span><i class=\"EmphasisTypeItalic \">(Ursus maritimus)</i><span>&nbsp;in the northern Alaska region den in coastal areas and on offshore drifting ice. We evaluated changes in the distribution of polar bear maternal dens between 1985 and 2005, using satellite telemetry. We determined the distribution of maternal dens occupied by 89 satellite collared female polar bears between 137&deg;W and 167&deg;W longitude. The proportion of dens on pack ice declined from 62% in 1985&ndash;1994 to 37% in 1998&ndash;2004 (</span><i class=\"EmphasisTypeItalic \">P</i><span>&nbsp;=&nbsp;0.044) and among pack ice dens fewer occurred in the western Beaufort Sea after 1998. We evaluated whether hunting, attraction to bowhead whale remains, or changes in sea ice could explain changes in den distribution. We concluded that denning distribution changed in response to reductions in stable old ice, increases in unconsolidated ice, and lengthening of the melt season. In consort, these changes have likely reduced the availability and quality of pack ice denning habitat. Further declines in sea ice availability are predicted. Therefore, we expect the proportion of polar bears denning in coastal areas will continue to increase, until such time as the autumn ice retreats far enough from shore that it precludes offshore pregnant females from reaching the Alaska coast in advance of denning.</span></p>","language":"English","publisher":"Springer","doi":"10.1007/s00300-007-0300-4","issn":"07224060","usgsCitation":"Fischbach, A., Amstrup, S.C., and Douglas, D., 2007, Landward and eastward shift of Alaskan polar bear denning associated with recent sea ice changes: Polar Biology, v. 30, no. 11, p. 1395-1405, https://doi.org/10.1007/s00300-007-0300-4.","productDescription":"11 p.","startPage":"1395","endPage":"1405","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":239988,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","volume":"30","issue":"11","noUsgsAuthors":false,"publicationDate":"2007-06-07","publicationStatus":"PW","scienceBaseUri":"505a446de4b0c8380cd66acf","contributors":{"authors":[{"text":"Fischbach, Anthony S. 0000-0002-6555-865X afischbach@usgs.gov","orcid":"https://orcid.org/0000-0002-6555-865X","contributorId":200780,"corporation":false,"usgs":true,"family":"Fischbach","given":"Anthony S.","email":"afischbach@usgs.gov","affiliations":[{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":431278,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Amstrup, Steven C.","contributorId":67034,"corporation":false,"usgs":false,"family":"Amstrup","given":"Steven","email":"","middleInitial":"C.","affiliations":[{"id":13182,"text":"Polar Bears International","active":true,"usgs":false}],"preferred":false,"id":431280,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Douglas, David C. 0000-0003-0186-1104 ddouglas@usgs.gov","orcid":"https://orcid.org/0000-0003-0186-1104","contributorId":150115,"corporation":false,"usgs":true,"family":"Douglas","given":"David C.","email":"ddouglas@usgs.gov","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":116,"text":"Alaska Science Center Biology MFEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":431279,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031380,"text":"70031380 - 2007 - Fate and groundwater impacts of produced water releases at OSPER \"B\" site, Osage County, Oklahoma","interactions":[],"lastModifiedDate":"2023-07-24T12:16:10.15441","indexId":"70031380","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Fate and groundwater impacts of produced water releases at OSPER \"B\" site, Osage County, Oklahoma","docAbstract":"<div id=\"abstracts\" class=\"Abstracts u-font-gulliver text-s\"><div id=\"aep-abstract-id15\" class=\"abstract author\" lang=\"en\"><div id=\"aep-abstract-sec-id16\"><p>For the last 5&nbsp;a, the authors have been investigating the transport, fate, natural attenuation and ecosystem impacts of inorganic and organic compounds in releases of produced water and associated hydrocarbons at the Osage-Skiatook Petroleum Environmental Research (OSPER) “A” and “B” sites, located in NE Oklahoma. Approximately 1.0&nbsp;ha of land at OSPER “B”, located within the active Branstetter lease, is visibly affected by salt scarring, tree kills, soil salinization, and brine and petroleum contamination. Site “B” includes an active production tank battery and adjacent large brine pit, two injection well sites, one with an adjacent small pit, and an abandoned brine pit and tank battery site. Oil production in this lease started in 1938, and currently there are 10 wells that produce 0.2–0.5&nbsp;m<sup>3</sup>/d (1–3&nbsp;bbl/d) oil, and 8–16&nbsp;m<sup>3</sup>/d (50–100&nbsp;bbl/d) brine. Geochemical data from nearby oil wells show that the produced water source is a Na–Ca–Cl brine (∼150,000&nbsp;mg/L TDS), with high Mg, but low SO<sub>4</sub><span>&nbsp;</span>and dissolved organic concentrations. Groundwater impacts are being investigated by detailed chemical analyses of water from repeated sampling of 41 boreholes, 1–71&nbsp;m deep. The most important results at OSPER “B” are: (1) significant amounts of produced water from the two active brine pits percolate into the surficial rocks and flow towards the adjacent Skiatook reservoir, but only minor amounts of liquid petroleum leave the brine pits; (2) produced-water brine and minor dissolved organics have penetrated the thick (3–7&nbsp;m) shale and siltstone units resulting in the formation of three interconnected plumes of high-salinity water (5000–30,000&nbsp;mg/L TDS) that extend towards the Skiatook reservoir from the two active and one abandoned brine pits; and (3) groundwater from the deep section of only one well, BR-01 located 330&nbsp;m upslope and west of the site, appear not to be impacted by petroleum operations.</p></div></div></div>","language":"English","publisher":"Elsevier","doi":"10.1016/j.apgeochem.2007.04.005","issn":"08832927","usgsCitation":"Kharaka, Y.K., Kakouros, E., Thordsen, J., Ambats, G., and Abbott, M.M., 2007, Fate and groundwater impacts of produced water releases at OSPER \"B\" site, Osage County, Oklahoma: Applied Geochemistry, v. 22, no. 10, p. 2164-2176, https://doi.org/10.1016/j.apgeochem.2007.04.005.","productDescription":"13 p.","startPage":"2164","endPage":"2176","numberOfPages":"13","costCenters":[],"links":[{"id":239955,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Oklahoma","county":"Osage 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Yousif K. 0000-0001-9861-8260 ykharaka@usgs.gov","orcid":"https://orcid.org/0000-0001-9861-8260","contributorId":1928,"corporation":false,"usgs":true,"family":"Kharaka","given":"Yousif","email":"ykharaka@usgs.gov","middleInitial":"K.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":431270,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kakouros, E. kakouros@usgs.gov","contributorId":34323,"corporation":false,"usgs":true,"family":"Kakouros","given":"E.","email":"kakouros@usgs.gov","affiliations":[],"preferred":false,"id":431271,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Thordsen, James J. jthordsn@usgs.gov","contributorId":3329,"corporation":false,"usgs":true,"family":"Thordsen","given":"James J.","email":"jthordsn@usgs.gov","affiliations":[{"id":438,"text":"National Research Program - Western 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,{"id":70031378,"text":"70031378 - 2007 - Postearthquake relaxation and aftershock accumulation linearly related after the 2003 M 6.5 Chengkung, Taiwan, and the 2004 M 6.0 Parkfield, California, earthquakes","interactions":[],"lastModifiedDate":"2023-07-24T11:08:50.253038","indexId":"70031378","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"title":"Postearthquake relaxation and aftershock accumulation linearly related after the 2003 M 6.5 Chengkung, Taiwan, and the 2004 M 6.0 Parkfield, California, earthquakes","docAbstract":"<div id=\"16137073\" class=\"article-section-wrapper js-article-section js-content-section  \" data-section-parent-id=\"0\"><p>We treat both the number of earthquakes and the deformation following a mainshock as the superposition of a steady background accumulation and the postearthquake process. The preseismic displacement and seismicity rates<span>&nbsp;</span><i>r<sub>u</sub></i><span>&nbsp;</span>and<span>&nbsp;</span><i>r<sub>E</sub></i><span>&nbsp;</span>are used as estimates of the background rates. Let<span>&nbsp;</span><i>t</i><span>&nbsp;</span>be the time after the mainshock,<span>&nbsp;</span><i>u</i>(<i>t</i>) +<span>&nbsp;</span><i>u</i><sub>0</sub><span>&nbsp;</span>the postseismic displacement less the background accumulation<span>&nbsp;</span><i>r<sub>u</sub>t</i>, and Δ<i>N</i>(<i>t</i>) the observed cumulative number of postseismic earthquakes less the background accumulation<span>&nbsp;</span><i>r<sub>E</sub>t</i>. For the first 160 days (duration limited by the occurrence of another nearby earthquake) following the Chengkung (<i>M</i><span>&nbsp;</span>6.5, 10 December 2003, eastern Taiwan) and the first 560 days following the Parkfield (<i>M</i><span>&nbsp;</span>6.0, 28 September 2004, central California) earthquakes<span>&nbsp;</span><i>u</i>(<i>t</i>) +<span>&nbsp;</span><i>u</i><sub>0</sub><span>&nbsp;</span>is a linear function of Δ<i>N</i>(<i>t</i>). The aftershock accumulation Δ<i>N</i>(<i>t</i>) for both earthquakes is described by the modified Omori Law<span>&nbsp;</span><i>d</i>Δ<i>N</i>/<i>dt</i><span>&nbsp;</span>∝ (1 +<span>&nbsp;</span><i>t</i>/<i>τ</i>)<sup>−<i>p</i></sup><span>&nbsp;</span>with<span>&nbsp;</span><i>p</i><span>&nbsp;</span>= 0.96 and<span>&nbsp;</span><i>τ</i><span>&nbsp;</span>= 0.03 days. Although the Chengkung earthquake involved sinistral, reverse slip on a moderately dipping fault and the Parkfield earthquake right-lateral slip on a near-vertical fault, the earthquakes share an unusual feature: both occurred on faults exhibiting interseismic fault creep at the surface. The source of the observed postseismic deformation appears to be afterslip on the coseismic rupture. The linear relation between<span>&nbsp;</span><i>u</i>(<i>t</i>) +<span>&nbsp;</span><i>u</i><sub>0</sub><span>&nbsp;</span>and<span>&nbsp;</span><i>N</i>(<i>t</i>) suggests that this afterslip also generates the aftershocks. The linear relation between<span>&nbsp;</span><i>u</i>(<i>t</i>) +<span>&nbsp;</span><i>u</i><sub>0</sub><span>&nbsp;</span>and Δ<i>N</i>(<i>t</i>) obtains after neither the 1999<span>&nbsp;</span><i>M</i><span>&nbsp;</span>7.1 Hector Mine (southern California) nor the 1999<span>&nbsp;</span><i>M</i><span>&nbsp;</span>7.6 Chi-Chi (central Taiwan) earthquakes, neither of which occurred on fault segments exhibiting fault creep.</p></div>","language":"English","publisher":"Seismological Society of America","doi":"10.1785/0120070069","issn":"00371106","usgsCitation":"Savage, J., and Yu, S., 2007, Postearthquake relaxation and aftershock accumulation linearly related after the 2003 M 6.5 Chengkung, Taiwan, and the 2004 M 6.0 Parkfield, California, earthquakes: Bulletin of the Seismological Society of America, v. 97, no. 5, p. 1632-1645, https://doi.org/10.1785/0120070069.","productDescription":"14 p.","startPage":"1632","endPage":"1645","numberOfPages":"14","costCenters":[],"links":[{"id":239921,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"97","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7e7be4b0c8380cd7a586","contributors":{"authors":[{"text":"Savage, J.C. 0000-0002-5114-7673","orcid":"https://orcid.org/0000-0002-5114-7673","contributorId":102876,"corporation":false,"usgs":true,"family":"Savage","given":"J.C.","affiliations":[],"preferred":false,"id":431263,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Yu, S.-B.","contributorId":101075,"corporation":false,"usgs":true,"family":"Yu","given":"S.-B.","email":"","affiliations":[],"preferred":false,"id":431262,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031377,"text":"70031377 - 2007 - Geochemistry of rare earth elements in Permian coals from the Huaibei Coalfield, China","interactions":[],"lastModifiedDate":"2012-03-12T17:21:14","indexId":"70031377","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2184,"text":"Journal of Asian Earth Sciences","active":true,"publicationSubtype":{"id":10}},"title":"Geochemistry of rare earth elements in Permian coals from the Huaibei Coalfield, China","docAbstract":"The rare earth elements (REEs) in coals are important because of: (a) REE patterns can be an indicator of the nature of source rocks of the mineral matter as well as sedimentary environments; (b) REEs abundance in coal may have industrial-significance. In this study, a total of thirty-four samples of Permian coal, partings, roof, and floor were collected from the Huaibei Coalfield, Anhui Province, China. Abundances of rare earth elements (REEs) and other elements in the samples were determined by inductively coupled-plasma mass spectrometry (ICP-MS) and inductively coupled-plasma atomic emission spectrometry (ICP-AES). The results show that the REEs are enriched in coals in the Huaibei Coalfield as compared with Chinese and U.S. coals and the world coal average. Coals in the Lower Shihezi Formation (No. 7, 5, and 4 Coals) and Upper Shihezi Formation (No. 3) have higher REE abundances than the coals in Shanxi Formation (No. 10). Magmatic intrusion resulted in high enrichment of REEs concentrations in No. 5 and 7 Coals. The REE abundances are positively correlated with the ash content. The mineral matter in these coals is mainly made up of clay minerals and carbonates. The REEs are positively correlated with lithophile elements including Si, Al, Ti, Fe, and Na, which are mainly distributed in clay minerals, indicating that REEs are contained mainly in clay minerals. The REE abundances in coals normalized by the ash are higher than that in partings. REEs abundances of coals cannot be accounted for by the REE content in the mineral matter, and some REEs associated with organic matter in coals. ?? 2007 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Asian Earth Sciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jseaes.2007.06.001","issn":"13679120","usgsCitation":"Zheng, L., Liu, G., Chou, C.L., Qi, C., and Zhang, Y., 2007, Geochemistry of rare earth elements in Permian coals from the Huaibei Coalfield, China: Journal of Asian Earth Sciences, v. 31, no. 2, p. 167-176, https://doi.org/10.1016/j.jseaes.2007.06.001.","startPage":"167","endPage":"176","numberOfPages":"10","costCenters":[],"links":[{"id":212408,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jseaes.2007.06.001"},{"id":239888,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"31","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a170ce4b0c8380cd55372","contributors":{"authors":[{"text":"Zheng, Lingyun","contributorId":68495,"corporation":false,"usgs":true,"family":"Zheng","given":"Lingyun","email":"","affiliations":[],"preferred":false,"id":431261,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Liu, Gaisheng","contributorId":15158,"corporation":false,"usgs":true,"family":"Liu","given":"Gaisheng","email":"","affiliations":[],"preferred":false,"id":431257,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Chou, C. L.","contributorId":32655,"corporation":false,"usgs":false,"family":"Chou","given":"C.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":431258,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Qi, C.","contributorId":39197,"corporation":false,"usgs":true,"family":"Qi","given":"C.","email":"","affiliations":[],"preferred":false,"id":431259,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Zhang, Y.","contributorId":59969,"corporation":false,"usgs":true,"family":"Zhang","given":"Y.","email":"","affiliations":[],"preferred":false,"id":431260,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031375,"text":"70031375 - 2007 - Voluminous low δ18O magmas in the late Miocene Heise volcanic field, Idaho: Implications for the fate of Yellowstone hotspot calderas","interactions":[],"lastModifiedDate":"2019-11-13T08:37:01","indexId":"70031375","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Voluminous low δ18O magmas in the late Miocene Heise volcanic field, Idaho: Implications for the fate of Yellowstone hotspot calderas","docAbstract":"We report oxygen isotope compositions of phenocrysts and U-Pb ages of zircons in four large caldera-forming ignimbrites and post-caldera lavas of the Heise volcanic field, a nested caldera complex in the Snake River Plain, that preceded volcanism in Yellowstone. Early eruption of three normal δ18O voluminous ignimbrites with δ18Oquartz = 6.4‰ and δ18Ozircon = 4.8‰ started at Heise at 6.6 Ma, and was followed by a 2‰–3‰ δ18O depletion in the subsequent 4.45 Ma Kilgore caldera cycle that includes the 1800 km3 Kilgore ignimbrite, and post-Kilgore intracaldera lavas with δ18Oquartz = 4.3‰ and δ18Ozircon = 1.5‰. The Kilgore ignimbrite represents the largest known low-δ18O magma in the Snake River Plain and worldwide. The post-Kilgore low δ18O volcanism likely represents the waning stages of silicic magmatism at Heise, prior to the reinitiation of normal δ18O silicic volcanism 100 km to the northeast at Yellowstone. The occurrence of low δ18O magmas at Heise and Yellowstone hallmarks a mature stage of individual volcanic cycles in each caldera complex. Sudden shifts in δ18O of silicic magmas erupted from the same nested caldera complexes argue against any inheritance of the low δ18O signature from mantle or crustal sources. Instead, δ18O age trends indicate progressive remelting of low δ18O hydrothermally altered intracaldera rocks of previous eruptions. This trend may be generally applicable to older caldera complexes in the Snake River Plain that are poorly exposed.","language":"English","publisher":"Geological Society of America","doi":"10.1130/G24141A.1","issn":"00917613","usgsCitation":"Bindeman, I., Watts, K.E., Schmitt, A., Morgan, L., and Shanks, P., 2007, Voluminous low δ18O magmas in the late Miocene Heise volcanic field, Idaho: Implications for the fate of Yellowstone hotspot calderas: Geology, v. 35, no. 11, p. 1019-1022, https://doi.org/10.1130/G24141A.1.","productDescription":"4 p.","startPage":"1019","endPage":"1022","costCenters":[{"id":218,"text":"Denver Federal Center","active":false,"usgs":true}],"links":[{"id":239854,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212378,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/G24141A.1"}],"country":"United States","volume":"35","issue":"11","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc36ce4b08c986b32b186","contributors":{"authors":[{"text":"Bindeman, I.N.","contributorId":99337,"corporation":false,"usgs":true,"family":"Bindeman","given":"I.N.","affiliations":[],"preferred":false,"id":431251,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Watts, Kathryn E. 0000-0002-6110-7499 kwatts@usgs.gov","orcid":"https://orcid.org/0000-0002-6110-7499","contributorId":5081,"corporation":false,"usgs":true,"family":"Watts","given":"Kathryn","email":"kwatts@usgs.gov","middleInitial":"E.","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":775107,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Schmitt, A.K.","contributorId":75320,"corporation":false,"usgs":true,"family":"Schmitt","given":"A.K.","email":"","affiliations":[],"preferred":false,"id":431249,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Morgan, Lisa","contributorId":57751,"corporation":false,"usgs":true,"family":"Morgan","given":"Lisa","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":775108,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Shanks, Pat","contributorId":60514,"corporation":false,"usgs":true,"family":"Shanks","given":"Pat","email":"","affiliations":[],"preferred":false,"id":775109,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031374,"text":"70031374 - 2007 - Finite-frequency traveltime tomography of San Francisco Bay region crustal velocity structure","interactions":[],"lastModifiedDate":"2023-07-20T11:16:06.730061","indexId":"70031374","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1803,"text":"Geophysical Journal International","active":true,"publicationSubtype":{"id":10}},"title":"Finite-frequency traveltime tomography of San Francisco Bay region crustal velocity structure","docAbstract":"<p class=\"chapter-para\">Seismic velocity structure of the San Francisco Bay region crust is derived using measurements of finite-frequency traveltimes. A total of 57 801 relative traveltimes are measured by cross-correlation over the frequency range 0.5–1.5 Hz. From these are derived 4862 ‘summary’ traveltimes, which are used to derive 3-D<span>&nbsp;</span><i>P</i>-wave velocity structure over a 341 × 140 km<sup>2</sup><span>&nbsp;</span>area from the surface to 25 km depth. The seismic tomography is based on sensitivity kernels calculated on a spherically symmetric reference model. Robust elements of the derived<span>&nbsp;</span><i>P</i>-wave velocity structure are: a pronounced velocity contrast across the San Andreas fault in the south Bay region (west side faster); a moderate velocity contrast across the Hayward fault (west side faster); moderately low velocity crust around the Quien Sabe volcanic field and the Sacramento River delta; very low velocity crust around Lake Berryessa. These features are generally explicable with surface rock types being extrapolated to depth ∼10 km in the upper crust. Generally high mid-lower crust velocity and high inferred Poisson's ratio suggest a mafic lower crust.</p>","language":"English","publisher":"Oxford Academic","doi":"10.1111/j.1365-246X.2007.03532.x","issn":"0956540X","usgsCitation":"Pollitz, F., 2007, Finite-frequency traveltime tomography of San Francisco Bay region crustal velocity structure: Geophysical Journal International, v. 171, no. 2, p. 630-656, https://doi.org/10.1111/j.1365-246X.2007.03532.x.","productDescription":"27 p.","startPage":"630","endPage":"656","numberOfPages":"27","costCenters":[],"links":[{"id":239853,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"San Francisco Bay region","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -123.44690589033075,\n              38.695260367185796\n            ],\n            [\n              -123.44690589033075,\n              36.92551991847962\n            ],\n            [\n              -121.2505826039804,\n              36.92551991847962\n            ],\n            [\n              -121.2505826039804,\n              38.695260367185796\n            ],\n            [\n              -123.44690589033075,\n              38.695260367185796\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"171","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1030e4b0c8380cd53b7e","contributors":{"authors":[{"text":"Pollitz, F. F.","contributorId":108280,"corporation":false,"usgs":true,"family":"Pollitz","given":"F. F.","affiliations":[],"preferred":false,"id":431246,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70031372,"text":"70031372 - 2007 - Diurnal variability in riverine dissolved organic matter composition determined by in situ optical measurement in the San Joaquin River (California, USA)","interactions":[],"lastModifiedDate":"2017-03-15T14:58:12","indexId":"70031372","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1924,"text":"Hydrological Processes","active":true,"publicationSubtype":{"id":10}},"title":"Diurnal variability in riverine dissolved organic matter composition determined by in situ optical measurement in the San Joaquin River (California, USA)","docAbstract":"Dissolved organic matter (DOM) concentration and composition in riverine and stream systems are known to vary with hydrological and productivity cycles over the annual and interannual time scales. Rivers are commonly perceived as homogeneous with respect to DOM concentration and composition, particularly under steady flow conditions over short time periods. However, few studies have evaluated the impact of short term variability ( &lt; 1 day) on DOM dynamics. This study examined whether diurnal processes measurably altered DOM concentration and composition in the hypereutrophic San Joaquin River (California) during a relatively quiescent period. We evaluated the efficacy of using optical in situ measurements to reveal changes in DOM which may not be evident from bulk dissolved organic carbon (DOC) measurement alone. The in situ optical measurements described in this study clearly showed for the first time diurnal variations in DOM measurements, which have previously been related to both composition and concentration, even though diurnal changes were not well reflected in bulk DOC concentrations. An apparent asynchronous trend of DOM absorbance and chlorophyll-a in comparison to chromophoric dissolved organic matter (CDOM) fluorescence and spectral slope S290-350 suggests that no one specific CDOM spectrophotometric measurement explains absolutely DOM diurnal variation in this system; the measurement of multiple optical parameters is therefore recommended. The observed diurnal changes in DOM composition, measured by in situ optical instrumentation likely reflect both photochemical and biologically-mediated processes. The results of this study highlight that short-term variability in DOM composition may complicate trends for studies aiming to distinguish different DOM sources in riverine systems and emphasizes the importance of sampling specific study sites to be compared at the same time of day. The utilization of in situ optical technology allows short-term variability in DOM dynamics to be monitored and serves to increase our understanding of its processing and fundamental role in the aquatic environment. Copyright ?? 2007 John Wiley & Sons, Ltd.","language":"English","publisher":"Wiley","doi":"10.1002/hyp.6887","issn":"08856087","usgsCitation":"Spencer, R., Pellerin, B., Bergamaschi, B., Downing, B., Kraus, T., Smart, D., Dahlgren, R., and Hernes, P., 2007, Diurnal variability in riverine dissolved organic matter composition determined by in situ optical measurement in the San Joaquin River (California, USA): Hydrological Processes, v. 21, no. 23, p. 3181-3189, https://doi.org/10.1002/hyp.6887.","productDescription":"9 p.","startPage":"3181","endPage":"3189","numberOfPages":"9","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":239818,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212347,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/hyp.6887"}],"volume":"21","issue":"23","noUsgsAuthors":false,"publicationDate":"2007-09-25","publicationStatus":"PW","scienceBaseUri":"505a0343e4b0c8380cd503bf","contributors":{"authors":[{"text":"Spencer, R.G.M.","contributorId":60361,"corporation":false,"usgs":true,"family":"Spencer","given":"R.G.M.","email":"","affiliations":[],"preferred":false,"id":431237,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pellerin, B.A.","contributorId":81233,"corporation":false,"usgs":true,"family":"Pellerin","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":431239,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bergamaschi, B.A. 0000-0002-9610-5581","orcid":"https://orcid.org/0000-0002-9610-5581","contributorId":22401,"corporation":false,"usgs":true,"family":"Bergamaschi","given":"B.A.","affiliations":[],"preferred":false,"id":431235,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Downing, B.D. 0000-0002-2007-5304","orcid":"https://orcid.org/0000-0002-2007-5304","contributorId":71681,"corporation":false,"usgs":true,"family":"Downing","given":"B.D.","affiliations":[],"preferred":false,"id":431238,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Kraus, T.E.C. 0000-0002-5187-8644","orcid":"https://orcid.org/0000-0002-5187-8644","contributorId":9758,"corporation":false,"usgs":true,"family":"Kraus","given":"T.E.C.","affiliations":[],"preferred":false,"id":431234,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Smart, D.R.","contributorId":99774,"corporation":false,"usgs":true,"family":"Smart","given":"D.R.","email":"","affiliations":[],"preferred":false,"id":431241,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Dahlgren, R.A.","contributorId":28409,"corporation":false,"usgs":true,"family":"Dahlgren","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":431236,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Hernes, P.J.","contributorId":89651,"corporation":false,"usgs":true,"family":"Hernes","given":"P.J.","affiliations":[],"preferred":false,"id":431240,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70031371,"text":"70031371 - 2007 - Use of eyeballs for establishing ploidy of Asian carp","interactions":[],"lastModifiedDate":"2012-03-12T17:21:14","indexId":"70031371","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2886,"text":"North American Journal of Fisheries Management","active":true,"publicationSubtype":{"id":10}},"title":"Use of eyeballs for establishing ploidy of Asian carp","docAbstract":"Grass carp Ctenopharyngodon idella, silver carp Hypophthalmichthys molitrix, and bighead carp H. nobilis are now established and relatively common in the Mississippi and Atchafalaya rivers. Commercial fishers of Louisiana's large rivers report recurrent catches of grass carp, and the frequency of bighead carp and silver carp catch is increasing. Twelve black carp Mylopharyngodon piceus were recently captured from the Mississippi and Atchafalaya River system, and 10 were analyzed for ploidy. By using the methods described herein, all 10 fish were determined to be diploid. Such correct identifications of ploidy of feral Asian carp species, as well as other species, would provide science-based information constructive for meeting reporting requirements, tracking fish movements, and forecasting expansion of species distribution. To investigate the postmortem period for sample collection and to lessen demands on field operations for obtaining samples, a laboratory study was performed to determine the length of time for which eyeballs from postmortem black carp could be used for ploidy determinations. Acquiring eyes rather than blood is simpler and quicker and requires no special supplies. An internal DNA reference standard with a documented genome size, including erythrocytes from diploid black carp or Nile tilapia Oreochromis niloticus, was analyzed simultaneously with cells from seven known triploid black carp to assess ploidy through 12 d after extraction. Ploidy determinations were reliable through 8 d postmortem. The field process entails excision of an eyeball, storage in a physiological buffer, and shipment within 8 d at refrigeration temperatures (4??C) to the laboratory for analysis by flow cytometry. ?? Copyright by the American Fisheries Society 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"North American Journal of Fisheries Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1577/M06-261.1","issn":"02755947","usgsCitation":"Jenkins, J., and Thomas, R., 2007, Use of eyeballs for establishing ploidy of Asian carp: North American Journal of Fisheries Management, v. 27, no. 4, p. 1195-1202, https://doi.org/10.1577/M06-261.1.","startPage":"1195","endPage":"1202","numberOfPages":"8","costCenters":[],"links":[{"id":212346,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/M06-261.1"},{"id":239817,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-11-01","publicationStatus":"PW","scienceBaseUri":"505bbefae4b08c986b3298c9","contributors":{"authors":[{"text":"Jenkins, J.A. 0000-0002-5087-0894","orcid":"https://orcid.org/0000-0002-5087-0894","contributorId":51703,"corporation":false,"usgs":true,"family":"Jenkins","given":"J.A.","affiliations":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"preferred":false,"id":431232,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Thomas, R.G.","contributorId":76943,"corporation":false,"usgs":true,"family":"Thomas","given":"R.G.","email":"","affiliations":[],"preferred":false,"id":431233,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031370,"text":"70031370 - 2007 - Cross-calibration of the Terra MODIS, Landsat 7 ETM+ and EO-1 ALI sensors using near-simultaneous surface observation over the Railroad Valley Playa, Nevada, test site","interactions":[],"lastModifiedDate":"2024-09-17T15:06:35.171594","indexId":"70031370","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Cross-calibration of the Terra MODIS, Landsat 7 ETM+ and EO-1 ALI sensors using near-simultaneous surface observation over the Railroad Valley Playa, Nevada, test site","docAbstract":"A cross-calibration methodology has been developed using coincident image pairs from the Terra Moderate Resolution Imaging Spectroradiometer (MODIS), the Landsat 7 (L7) Enhanced Thematic Mapper Plus (ETM+) and the Earth Observing EO-1 Advanced Land Imager (ALI) to verify the absolute radiometric calibration accuracy of these sensors with respect to each other. To quantify the effects due to different spectral responses, the Relative Spectral Responses (RSR) of these sensors were studied and compared by developing a set of \"figures-of-merit.\" Seven cloud-free scenes collected over the Railroad Valley Playa, Nevada (RVPN), test site were used to conduct the cross-calibration study. This cross-calibration approach was based on image statistics from near-simultaneous observations made by different satellite sensors. Homogeneous regions of interest (ROI) were selected in the image pairs, and the mean target statistics were converted to absolute units of at-sensor reflectance. Using these reflectances, a set of cross-calibration equations were developed giving a relative gain and bias between the sensor pair.","conferenceTitle":"Earth Observing Systems XII","conferenceDate":"August 26-28, 2007","conferenceLocation":"San Diego, CA","language":"English","doi":"10.1117/12.734292","issn":"0277786X","isbn":"9780819468253","usgsCitation":"Chander, G., Angal, A., Choi, T., Meyer, D.J., Xiong, X., and Teillet, P., 2007, Cross-calibration of the Terra MODIS, Landsat 7 ETM+ and EO-1 ALI sensors using near-simultaneous surface observation over the Railroad Valley Playa, Nevada, test site, Earth Observing Systems XII, v. 6677, San Diego, CA, August 26-28, 2007, 66770Y, 12 p., https://doi.org/10.1117/12.734292.","productDescription":"66770Y, 12 p.","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":239786,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"6677","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fcc1e4b0c8380cd4e400","contributors":{"authors":[{"text":"Chander, G.","contributorId":51449,"corporation":false,"usgs":true,"family":"Chander","given":"G.","affiliations":[],"preferred":false,"id":431230,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Angal, A.","contributorId":52716,"corporation":false,"usgs":true,"family":"Angal","given":"A.","affiliations":[],"preferred":false,"id":431231,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Choi, T.","contributorId":48698,"corporation":false,"usgs":true,"family":"Choi","given":"T.","affiliations":[],"preferred":false,"id":431229,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Meyer, D. J.","contributorId":46721,"corporation":false,"usgs":true,"family":"Meyer","given":"D.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":431228,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Xiong, X.","contributorId":37885,"corporation":false,"usgs":true,"family":"Xiong","given":"X.","affiliations":[],"preferred":false,"id":431227,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Teillet, P.M.","contributorId":23717,"corporation":false,"usgs":true,"family":"Teillet","given":"P.M.","email":"","affiliations":[],"preferred":false,"id":431226,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031368,"text":"70031368 - 2007 - Detection ratios on winter surveys of Rocky Mountain Trumpeter Swans Cygnus buccinator","interactions":[],"lastModifiedDate":"2017-11-15T13:39:02","indexId":"70031368","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3764,"text":"Wildfowl","onlineIssn":"2052-6458","printIssn":"0954-6324","active":true,"publicationSubtype":{"id":10}},"title":"Detection ratios on winter surveys of Rocky Mountain Trumpeter Swans Cygnus buccinator","docAbstract":"We estimated the detection ratio for Rocky Mountain Trumpeter Swans Cygnus buccinator that were counted during aerial surveys made in winter. The standard survey involved counting white or grey birds on snow and ice and thus might be expected to have had low detection ratios. On the other hand, observers were permitted to circle areas where the birds were concentrated multiple times to obtain accurate counts. Actual numbers present were estimated by conducting additional intensive aerial counts either immediately before or immediately after the standard count. Surveyors continued the intensive surveys at each area until consecutive counts were identical. The surveys were made at 10 locations in 2006 and at 19 locations in 2007. A total of 2,452 swans were counted on the intensive surveys. Detection ratios did not vary detectably with year, observer, which survey was conducted first, age of the swans, or the number of swans present. The overall detection ratio was 0.93 (90% confidence interval 0.82-1.04), indicating that the counts were quite accurate. Results are used to depict changes in population size for Rocky Mountain Trumpeter Swans from 1974-2007. ?? Wildfowl & Wetlands Trust.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Wildfowl","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"09546324","usgsCitation":"Bart, J., Mitchell, C., Fisher, M., and Dubovsky, J., 2007, Detection ratios on winter surveys of Rocky Mountain Trumpeter Swans Cygnus buccinator: Wildfowl, v. 57, p. 21-28.","startPage":"21","endPage":"28","numberOfPages":"8","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":239753,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"57","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ff7de4b0c8380cd4f20d","contributors":{"authors":[{"text":"Bart, J.","contributorId":76272,"corporation":false,"usgs":true,"family":"Bart","given":"J.","affiliations":[],"preferred":false,"id":431222,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mitchell, C.D.","contributorId":54019,"corporation":false,"usgs":true,"family":"Mitchell","given":"C.D.","email":"","affiliations":[],"preferred":false,"id":431221,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Fisher, M.N.","contributorId":94100,"corporation":false,"usgs":true,"family":"Fisher","given":"M.N.","email":"","affiliations":[],"preferred":false,"id":431223,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dubovsky, J.A.","contributorId":50242,"corporation":false,"usgs":true,"family":"Dubovsky","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":431220,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031367,"text":"70031367 - 2007 - Large fluctuations of dissolved oxygen in the Indian and Pacific oceans during Dansgaard-Oeschger oscillations caused by variations of North Atlantic Deep Water subduction","interactions":[],"lastModifiedDate":"2012-03-12T17:21:14","indexId":"70031367","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3002,"text":"Paleoceanography","active":true,"publicationSubtype":{"id":10}},"title":"Large fluctuations of dissolved oxygen in the Indian and Pacific oceans during Dansgaard-Oeschger oscillations caused by variations of North Atlantic Deep Water subduction","docAbstract":"Paleoclimate records from glacial Indian and Pacific oceans sediments document millennial-scale fluctuations of subsurface dissolved oxygen levels and denitrification coherent with North Atlantic temperature oscillations. Yet the mechanism of this teleconnection between the remote ocean basins remains elusive. Here we present model simulations of the oxygen and nitrogen cycles that explain how changes in deepwater subduction in the North Atlantic can cause large and synchronous variations of oxygen minimum zones, throughout the Northern Hemisphere of the Indian and Pacific oceans, consistent with the paleoclimate records. Cold periods in the North Atlantic are associated with reduced nutrient delivery to the upper Indo-Pacific oceans, thereby decreasing productivity. Reduced export production diminishes subsurface respiration of organic matter leading to higher oxygen concentrations and less denitrification. This effect of reduced oxygen consumption dominates at low latitudes. At high latitudes in the Southern Ocean and North Pacific, increased mixed layer depths and steepening of isopycnals improve ocean ventilation and oxygen supply to the subsurface. Atmospheric teleconnections through changes in wind-driven ocean circulation modify this basin-scale pattern regionally. These results suggest that changes in the Atlantic Ocean circulation, similar to those projected by climate models to possibly occur in the centuries to come because of anthropogenic climate warming, can have large effects on marine ecosystems and biogeochemical cycles even in remote areas. Copyright 2007 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Paleoceanography","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2006PA001384","issn":"08838305","usgsCitation":"Schmittner, A., Galbraith, E., Hostetler, S.W., Pedersen, T.F., and Zhang, R., 2007, Large fluctuations of dissolved oxygen in the Indian and Pacific oceans during Dansgaard-Oeschger oscillations caused by variations of North Atlantic Deep Water subduction: Paleoceanography, v. 22, no. 3, https://doi.org/10.1029/2006PA001384.","costCenters":[],"links":[{"id":239752,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212289,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2006PA001384"}],"volume":"22","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4479e4b0c8380cd66b38","contributors":{"authors":[{"text":"Schmittner, A.","contributorId":18977,"corporation":false,"usgs":true,"family":"Schmittner","given":"A.","affiliations":[],"preferred":false,"id":431216,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Galbraith, E.D.","contributorId":20157,"corporation":false,"usgs":true,"family":"Galbraith","given":"E.D.","email":"","affiliations":[],"preferred":false,"id":431217,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hostetler, S. W. 0000-0003-2272-8302","orcid":"https://orcid.org/0000-0003-2272-8302","contributorId":42911,"corporation":false,"usgs":true,"family":"Hostetler","given":"S.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":431218,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Pedersen, Thomas F.","contributorId":13785,"corporation":false,"usgs":true,"family":"Pedersen","given":"Thomas","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":431215,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Zhang, R.","contributorId":56445,"corporation":false,"usgs":true,"family":"Zhang","given":"R.","affiliations":[],"preferred":false,"id":431219,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031359,"text":"70031359 - 2007 - Climate-induced forest dieback as an emergent global phenomenon: Organized oral session at the Ecological Society of America/Society of Ecological Restoration Joint Meeting; San Jose, California, 5-10 August 2007 ","interactions":[],"lastModifiedDate":"2018-01-23T09:34:52","indexId":"70031359","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1578,"text":"Eos, Transactions, American Geophysical Union","onlineIssn":"2324-9250","printIssn":"0096-394","active":true,"publicationSubtype":{"id":10}},"title":"Climate-induced forest dieback as an emergent global phenomenon: Organized oral session at the Ecological Society of America/Society of Ecological Restoration Joint Meeting; San Jose, California, 5-10 August 2007 ","docAbstract":"<p>An organized oral session at the annual meeting of the Ecological Society of America in San Jose, Calif., posed this question: Is climate-induced drought stress triggering increasing rates and unusual patterns of forest die-off at a global scale? Twenty-nine researchers representing five continents reported on patterns, mechanisms, and projections of forest mortality.</p><p>Observations include widespread forest dieback or reductions in tree cover and biodiversity in response to drought and warmer temperatures in the African Sahel (Patrick Gonzalez, The Nature Conservancy), Mediterranean and alpine Europe (Jorge Castro, Universidad de Granada), and Argentinean Patagonia (Thomas Kitzberger, Universidad Nacional del Comahue). In contrast, although much Eucalyptus mortality has resulted from recent droughts in Australia, warming trends have been less pronounced in the Southern Hemisphere and it is unclear if contemporary climate-induced tree mortality differs from previous historical drought impacts (Rod Fensham, Queensland Herbarium).</p>","language":"English","publisher":"AGU Publications","doi":"10.1029/2007EO470008","usgsCitation":"Allen, C.D., and Breshears, D.D., 2007, Climate-induced forest dieback as an emergent global phenomenon: Organized oral session at the Ecological Society of America/Society of Ecological Restoration Joint Meeting; San Jose, California, 5-10 August 2007 : Eos, Transactions, American Geophysical Union, v. 88, no. 47, p. 504-504, https://doi.org/10.1029/2007EO470008.","productDescription":"1 p.","startPage":"504","endPage":"504","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":477264,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2007eo470008","text":"Publisher Index Page"},{"id":239619,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"88","issue":"47","noUsgsAuthors":false,"publicationDate":"2007-12-03","publicationStatus":"PW","scienceBaseUri":"5059f659e4b0c8380cd4c6ef","contributors":{"authors":[{"text":"Allen, Craig D. 0000-0002-8777-5989 craig_allen@usgs.gov","orcid":"https://orcid.org/0000-0002-8777-5989","contributorId":2597,"corporation":false,"usgs":true,"family":"Allen","given":"Craig","email":"craig_allen@usgs.gov","middleInitial":"D.","affiliations":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true},{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":431188,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Breshears, David D.","contributorId":51620,"corporation":false,"usgs":false,"family":"Breshears","given":"David","email":"","middleInitial":"D.","affiliations":[{"id":7042,"text":"University of Arizona","active":true,"usgs":false}],"preferred":false,"id":431187,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031356,"text":"70031356 - 2007 - Field assessment of alternative bed-load transport estimators","interactions":[],"lastModifiedDate":"2016-06-01T15:17:26","indexId":"70031356","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2338,"text":"Journal of Hydraulic Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Field assessment of alternative bed-load transport estimators","docAbstract":"<p>Measurement of near-bed sediment velocities with acoustic Doppler current profilers (ADCPs) is an emerging approach for quantifying bed-load sediment fluxes in rivers. Previous investigations of the technique have relied on conventional physical bed-load sampling to provide reference transport information with which to validate the ADCP measurements. However, physical samples are subject to substantial errors, especially under field conditions in which surrogate methods are most needed. Comparisons between ADCP bed velocity measurements with bed-load transport rates estimated from bed-form migration rates in the lower Missouri River show a strong correlation between the two surrogate measures over a wide range of mild to moderately intense sediment transporting conditions. The correlation between the ADCP measurements and physical bed-load samples is comparatively poor, suggesting that physical bed-load sampling is ineffective for ground-truthing alternative techniques in large sand-bed rivers. Bed velocities measured in this study became more variable with increasing bed-form wavelength at higher shear stresses. Under these conditions, bed-form dimensions greatly exceed the region of the bed ensonified by the ADCP, and the magnitude of the acoustic measurements depends on instrument location with respect to bed-form crests and troughs. Alternative algorithms for estimating bed-load transport from paired longitudinal profiles of bed topography were evaluated. An algorithm based on the routing of local erosion and deposition volumes that eliminates the need to identify individual bed forms was found to give results similar to those of more conventional dune-tracking methods. This method is particularly useful in cases where complex bed-form morphology makes delineation of individual bed forms difficult. ?? 2007 ASCE.</p>","language":"English","publisher":"American Society of Civil Engineers","doi":"10.1061/(ASCE)0733-9429(2007)133:12(1319)","issn":"07339429","usgsCitation":"Gaeuman, G., and Jacobson, R., 2007, Field assessment of alternative bed-load transport estimators: Journal of Hydraulic Engineering, v. 133, no. 12, p. 1319-1328, https://doi.org/10.1061/(ASCE)0733-9429(2007)133:12(1319).","productDescription":"10 p.","startPage":"1319","endPage":"1328","numberOfPages":"10","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"links":[{"id":240130,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212616,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1061/(ASCE)0733-9429(2007)133:12(1319)"}],"country":"United States","state":"Missouri","otherGeospatial":"Lower Missouri River","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -92.67379760742188,\n              38.99463939467871\n            ],\n            [\n              -92.67242431640625,\n              38.966883415149596\n            ],\n            [\n              -92.57492065429688,\n              38.95300134535987\n            ],\n            [\n              -92.5048828125,\n              38.88889501576177\n            ],\n            [\n              -92.44308471679688,\n              38.81189098781871\n            ],\n            [\n              -92.43209838867188,\n              38.853611850579966\n            ],\n            [\n              -92.5048828125,\n              38.96154447940714\n            ],\n            [\n              -92.64358520507812,\n              38.9914373369788\n            ],\n            [\n              -92.67379760742188,\n              38.99463939467871\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"133","issue":"12","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0fa6e4b0c8380cd5397e","contributors":{"authors":[{"text":"Gaeuman, G.","contributorId":34325,"corporation":false,"usgs":true,"family":"Gaeuman","given":"G.","email":"","affiliations":[],"preferred":false,"id":431179,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jacobson, R. B. 0000-0002-8368-2064","orcid":"https://orcid.org/0000-0002-8368-2064","contributorId":92614,"corporation":false,"usgs":true,"family":"Jacobson","given":"R. B.","affiliations":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"preferred":true,"id":431180,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031354,"text":"70031354 - 2007 - Evaluation of sulfate reduction at experimentally induced mixing interfaces using small-scale push-pull tests in an aquifer-wetland system","interactions":[],"lastModifiedDate":"2018-10-17T13:25:58","indexId":"70031354","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Evaluation of sulfate reduction at experimentally induced mixing interfaces using small-scale push-pull tests in an aquifer-wetland system","docAbstract":"<p><span>This paper presents small-scale push–pull tests designed to evaluate the kinetic controls on&nbsp;</span><span class=\"math\"><span id=\"MathJax-Element-1-Frame\" class=\"MathJax_SVG\" data-mathml=\"<math xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;><mrow is=&quot;true&quot;><msubsup is=&quot;true&quot;><mrow is=&quot;true&quot;><mtext is=&quot;true&quot;>SO</mtext></mrow><mrow is=&quot;true&quot;><mn is=&quot;true&quot;>4</mn></mrow><mrow is=&quot;true&quot;><mn is=&quot;true&quot;>2</mn><mo is=&quot;true&quot;>-</mo></mrow></msubsup></mrow></math>\"><span class=\"MJX_Assistive_MathML\">SO42-</span></span></span><span>&nbsp;reduction&nbsp;</span><i>in situ</i><span>&nbsp;at mixing interfaces between a wetland and aquifer impacted by landfill leachate at the Norman Landfill research site, Norman, OK. Quantifying the rates of redox reactions initiated at interfaces is of great interest because interfaces have been shown to be zones of increased biogeochemical transformations and thus may play an important role in natural attenuation. To mimic the aquifer–wetland interface and evaluate reaction rates,&nbsp;</span><span class=\"math\"><span id=\"MathJax-Element-2-Frame\" class=\"MathJax_SVG\" data-mathml=\"<math xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;><mrow is=&quot;true&quot;><msubsup is=&quot;true&quot;><mrow is=&quot;true&quot;><mtext is=&quot;true&quot;>SO</mtext></mrow><mrow is=&quot;true&quot;><mn is=&quot;true&quot;>4</mn></mrow><mrow is=&quot;true&quot;><mn is=&quot;true&quot;>2</mn><mo is=&quot;true&quot;>-</mo></mrow></msubsup></mrow></math>\"><span class=\"MJX_Assistive_MathML\">SO42-</span></span></span><span>-rich anaerobic aquifer water&nbsp;</span><span class=\"math\"><span id=\"MathJax-Element-3-Frame\" class=\"MathJax_SVG\" data-mathml=\"<math xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;><mrow is=&quot;true&quot;><mo stretchy=&quot;false&quot; is=&quot;true&quot;>(</mo><mi is=&quot;true&quot;>&amp;#x223C;</mi><mn is=&quot;true&quot;>100</mn><mspace width=&quot;0.25em&quot; is=&quot;true&quot; /><mtext is=&quot;true&quot;>mg</mtext><mo is=&quot;true&quot;>/</mo><mtext is=&quot;true&quot;>L</mtext><mspace width=&quot;0.35em&quot; is=&quot;true&quot; /><msubsup is=&quot;true&quot;><mrow is=&quot;true&quot;><mtext is=&quot;true&quot;>SO</mtext></mrow><mrow is=&quot;true&quot;><mn is=&quot;true&quot;>4</mn></mrow><mrow is=&quot;true&quot;><mn is=&quot;true&quot;>2</mn><mo is=&quot;true&quot;>-</mo></mrow></msubsup><mo stretchy=&quot;false&quot; is=&quot;true&quot;>)</mo></mrow></math>\"><span class=\"MJX_Assistive_MathML\">(∼100mg/LSO42-)</span></span></span><span>&nbsp;was introduced into&nbsp;</span><span class=\"math\"><span id=\"MathJax-Element-4-Frame\" class=\"MathJax_SVG\" data-mathml=\"<math xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;><mrow is=&quot;true&quot;><msubsup is=&quot;true&quot;><mrow is=&quot;true&quot;><mtext is=&quot;true&quot;>SO</mtext></mrow><mrow is=&quot;true&quot;><mn is=&quot;true&quot;>4</mn></mrow><mrow is=&quot;true&quot;><mn is=&quot;true&quot;>2</mn><mo is=&quot;true&quot;>-</mo></mrow></msubsup></mrow></math>\"><span class=\"MJX_Assistive_MathML\">SO42-</span></span></span><span>-depleted wetland porewater via push–pull tests. Results showed&nbsp;</span><span class=\"math\"><span id=\"MathJax-Element-5-Frame\" class=\"MathJax_SVG\" data-mathml=\"<math xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;><mrow is=&quot;true&quot;><msubsup is=&quot;true&quot;><mrow is=&quot;true&quot;><mtext is=&quot;true&quot;>SO</mtext></mrow><mrow is=&quot;true&quot;><mn is=&quot;true&quot;>4</mn></mrow><mrow is=&quot;true&quot;><mn is=&quot;true&quot;>2</mn><mo is=&quot;true&quot;>-</mo></mrow></msubsup></mrow></math>\"><span class=\"MJX_Assistive_MathML\">SO42-</span></span></span><span>&nbsp;reduction was stimulated by the mixing of these waters and first-order rate coefficients were comparable to those measured in other push–pull studies. However, rate data were complex involving either multiple first-order rate coefficients or a more complex rate order. In addition, a lag phase was observed prior to&nbsp;</span><span class=\"math\"><span id=\"MathJax-Element-6-Frame\" class=\"MathJax_SVG\" data-mathml=\"<math xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;><mrow is=&quot;true&quot;><msubsup is=&quot;true&quot;><mrow is=&quot;true&quot;><mtext is=&quot;true&quot;>SO</mtext></mrow><mrow is=&quot;true&quot;><mn is=&quot;true&quot;>4</mn></mrow><mrow is=&quot;true&quot;><mn is=&quot;true&quot;>2</mn><mo is=&quot;true&quot;>-</mo></mrow></msubsup></mrow></math>\"><span class=\"MJX_Assistive_MathML\">SO42-</span></span></span><span>&nbsp;reduction that persisted until the mixing interface between test solution and native water was recovered, irrespective of temporal and spatial constraints. The lag phase was not eliminated by the addition of electron donor (acetate) to the injected test solution. Subsequent push–pull tests designed to elucidate the nature of the lag phase support the importance of the mixing interface in controlling terminal electron accepting processes. These data suggest redox reactions may occur rapidly at the mixing interface between injected and native waters but not in the injected bulk water mass. Under these circumstances, push–pull test data should be evaluated to ensure the apparent rate is actually a function of time and that complexities in rate data be considered.</span></p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Applied Geochemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.apgeochem.2007.06.006","issn":"08832927","usgsCitation":"Kneeshaw, T., McGuire, J., Smith, E.W., and Cozzarelli, I.M., 2007, Evaluation of sulfate reduction at experimentally induced mixing interfaces using small-scale push-pull tests in an aquifer-wetland system: Applied Geochemistry, v. 22, no. 12, p. 2618-2629, https://doi.org/10.1016/j.apgeochem.2007.06.006.","productDescription":"12 p.","startPage":"2618","endPage":"2629","numberOfPages":"12","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240093,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212588,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.apgeochem.2007.06.006"}],"country":"United States","state":"Oklahoma","county":"Norman","volume":"22","issue":"12","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0ccce4b0c8380cd52cd5","contributors":{"authors":[{"text":"Kneeshaw, T.A.","contributorId":78552,"corporation":false,"usgs":true,"family":"Kneeshaw","given":"T.A.","email":"","affiliations":[],"preferred":false,"id":431176,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McGuire, Jennifer T.","contributorId":53979,"corporation":false,"usgs":true,"family":"McGuire","given":"Jennifer T.","affiliations":[],"preferred":false,"id":431174,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Smith, Erik W.","contributorId":104659,"corporation":false,"usgs":true,"family":"Smith","given":"Erik","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":431173,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cozzarelli, Isabelle M. 0000-0002-5123-1007 icozzare@usgs.gov","orcid":"https://orcid.org/0000-0002-5123-1007","contributorId":1693,"corporation":false,"usgs":true,"family":"Cozzarelli","given":"Isabelle","email":"icozzare@usgs.gov","middleInitial":"M.","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true},{"id":49175,"text":"Geology, Energy & Minerals Science Center","active":true,"usgs":true}],"preferred":true,"id":431175,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031351,"text":"70031351 - 2007 - Ephemeroptera, plecoptera, megaloptera, and trichoptera of Great Smoky Mountains National Park","interactions":[],"lastModifiedDate":"2012-03-12T17:21:13","indexId":"70031351","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Ephemeroptera, plecoptera, megaloptera, and trichoptera of Great Smoky Mountains National Park","docAbstract":"Great Smoky Mountains National Park (GSMNP), situated on the mountainous border of North Carolina and Tennessee, is recognized as one of the most highly diverse protected areas in the temperate region. In order to provide baseline data for the scientific management of GSMNP, an All Taxa Biodiversity Inventory (ATBI) was initiated in 1998. Among the goals of the ATBI are to discover the identity and distribution of as many as possible of the species of life that occur in GSMNP. The authors have concentrated on the orders of completely aquatic insects other than odonates. We examined or utilized others' records of more than 53,600 adult and 78,000 immature insects from 545 locations. At present, 469 species are known from GSMNP, including 120 species of Ephemeroptera (mayflies), 111 species of Plecoptera (stoneflies), 7 species of Megaloptera (dobsonflies, fishflies, and alderflies), and 231 species of Trichoptera (caddisflies). Included in this total are 10 species new to science discovered since the ATBI began.","largerWorkTitle":"Southeastern Naturalist","language":"English","doi":"10.1656/1528-7092(2007)6[159:TTTWMC]2.0.CO;2","issn":"15287092","usgsCitation":"Parker, C., Flint, O., Jacobus, L., Kondratieff, B., McCafferty, W., and Morse, J., 2007, Ephemeroptera, plecoptera, megaloptera, and trichoptera of Great Smoky Mountains National Park, <i>in</i> Southeastern Naturalist, v. 6, no. SPEC. ISS. 1, p. 159-174, https://doi.org/10.1656/1528-7092(2007)6[159:TTTWMC]2.0.CO;2.","startPage":"159","endPage":"174","numberOfPages":"16","costCenters":[],"links":[{"id":212526,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1656/1528-7092(2007)6[159:TTTWMC]2.0.CO;2"},{"id":240023,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"6","issue":"SPEC. ISS. 1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0a05e4b0c8380cd52169","contributors":{"authors":[{"text":"Parker, C.R.","contributorId":21892,"corporation":false,"usgs":true,"family":"Parker","given":"C.R.","email":"","affiliations":[],"preferred":false,"id":431161,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Flint, O.S. Jr.","contributorId":98948,"corporation":false,"usgs":true,"family":"Flint","given":"O.S.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":431165,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Jacobus, L.M.","contributorId":89723,"corporation":false,"usgs":true,"family":"Jacobus","given":"L.M.","email":"","affiliations":[],"preferred":false,"id":431164,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kondratieff, B.C.","contributorId":103230,"corporation":false,"usgs":true,"family":"Kondratieff","given":"B.C.","email":"","affiliations":[],"preferred":false,"id":431166,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"McCafferty, W.P.","contributorId":64028,"corporation":false,"usgs":true,"family":"McCafferty","given":"W.P.","email":"","affiliations":[],"preferred":false,"id":431163,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Morse, J.C.","contributorId":27263,"corporation":false,"usgs":true,"family":"Morse","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":431162,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031349,"text":"70031349 - 2007 - Mode of occurrence and environmental mobility of oil-field radioactive material at US Geological Survey research site B, Osage-Skiatook Project, northeastern Oklahoma","interactions":[],"lastModifiedDate":"2018-10-17T11:01:08","indexId":"70031349","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Mode of occurrence and environmental mobility of oil-field radioactive material at US Geological Survey research site B, Osage-Skiatook Project, northeastern Oklahoma","docAbstract":"<p><span>Two samples of produced-water collected from a storage tank at US Geological Survey research site B, near Skiatook Lake in northeastern Oklahoma, have activity concentrations of dissolved&nbsp;</span><sup>226</sup><span>Ra and&nbsp;</span><sup>228</sup><span>Ra that are about 1500 disintegrations/min/L (dpm/L). Produced-water also contains minor amounts of small (5–50</span><span>&nbsp;</span><span>μm) suspended grains of Ra-bearing BaSO</span><sub>4</sub><span>&nbsp;(barite). Precipitation of radioactive barite scale in the storage tank is probably hindered by low concentrations of dissolved SO</span><sub>4</sub><span>&nbsp;(2.5</span><span>&nbsp;</span><span>mg/L) in the produced-water. Sediments in a storage pit used to temporarily collect releases of produced-water have marginally elevated concentrations of “excess” Ra (several dpm/g), that are 15–65% above natural background values. Tank and pit waters are chemically oversaturated with barite, and some small (2–20</span><span>&nbsp;</span><span>μm) barite grains observed in the pit sediments could be transferred from the tank or formed in place. Measurements of the concentrations of Ba and excess Ra isotopes in the pit sediments show variations with depth that are consistent with relatively uniform deposition and progressive burial of an insoluble Ra-bearing host (barite?). The short-lived&nbsp;</span><sup>228</sup><span>Ra isotope (half-life</span><span>&nbsp;</span><span>=</span><span>&nbsp;</span><span>5.76</span><span>&nbsp;</span><span>a) shows greater reductions with depth than&nbsp;</span><sup>226</sup><span>Ra (half-life</span><span>&nbsp;</span><span>=</span><span>&nbsp;</span><span>1600</span><span>&nbsp;</span><span>a), that are likely explained by radioactive decay. The&nbsp;</span><sup>228</sup><span>Ra/</span><sup>226</sup><span>Ra activity ratio of excess Ra in uppermost pit sediments (1.13–1.17) is close to the ratio measured in the samples of produced-water (0.97,</span><span>&nbsp;</span><span>1.14). Declines in Ra activity ratio (excess) with sediment depth can be used to estimate an average rate of burial of 4</span><span>&nbsp;</span><span>cm/a for the Ra-bearing contaminant. Local shallow ground waters contaminated with NaCl from produced-water have low dissolved Ra (&lt;20</span><span>&nbsp;</span><span>dpm/L) and also are oversaturated with barite. Barite is a highly insoluble Ra host that probably limits the environmental mobility of Ra at site B.</span><span></span></p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Applied Geochemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.apgeochem.2007.04.014","issn":"08832927","usgsCitation":"Zielinski, R.A., and Budahn, J.R., 2007, Mode of occurrence and environmental mobility of oil-field radioactive material at US Geological Survey research site B, Osage-Skiatook Project, northeastern Oklahoma: Applied Geochemistry, v. 22, no. 10, p. 2125-2137, https://doi.org/10.1016/j.apgeochem.2007.04.014.","productDescription":"13 p.","startPage":"2125","endPage":"2137","numberOfPages":"13","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":239987,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212495,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.apgeochem.2007.04.014"}],"country":"United States","state":"Oklahoma","otherGeospatial":"Skiatook Lake","volume":"22","issue":"10","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5b9fe4b0c8380cd6f6b1","contributors":{"authors":[{"text":"Zielinski, Robert A. 0000-0002-4047-5129 rzielinski@usgs.gov","orcid":"https://orcid.org/0000-0002-4047-5129","contributorId":1593,"corporation":false,"usgs":true,"family":"Zielinski","given":"Robert","email":"rzielinski@usgs.gov","middleInitial":"A.","affiliations":[{"id":164,"text":"Central Energy Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":431157,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Budahn, James R. 0000-0001-9794-8882 jbudahn@usgs.gov","orcid":"https://orcid.org/0000-0001-9794-8882","contributorId":1175,"corporation":false,"usgs":true,"family":"Budahn","given":"James","email":"jbudahn@usgs.gov","middleInitial":"R.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":431156,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031348,"text":"70031348 - 2007 - A Ribeiroia spp. (Class: Trematoda) - Specific PCR-based diagnostic","interactions":[],"lastModifiedDate":"2018-01-23T15:56:55","indexId":"70031348","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2414,"text":"Journal of Parasitology","active":true,"publicationSubtype":{"id":10}},"title":"A Ribeiroia spp. (Class: Trematoda) - Specific PCR-based diagnostic","docAbstract":"<p>Increased reporting of amphibian malformations in North America has been noted with concern in light of reports that amphibian numbers and species are declining worldwide. Ribeiroia ondatrae has been shown to cause a variety of types of malformations in amphibians. However, little is known about the prevalence of R. ondatrae in North America. To aid in conducting field studies of Ribeiroia spp., we have developed a polymerase chain reaction (PCR)-based diagnostic. Herein, we describe the development of an accurate, rapid, simple, and cost-effective diagnostic for detection of Ribeiroia spp. infection in snails (Planorbella trivolvis). Candidate oligonucleotide primers for PCR were designed via DNA sequence analyses of multiple ribosomal internal transcribed spacer-2 regions from Ribeiroia spp. and Echinostoma spp. Comparison of consensus sequences determined from both genera identified areas of sequence potentially unique to Ribeiroia spp. The PCR reliably produced a diagnostic 290-base pair (bp) product in the presence of a wide concentration range of snail or frog DNA. Sensitivity was examined with DNA extracted from single R. ondatrae cercaria. The single-tube PCR could routinely detect less than 1 cercariae equivalent, because DNA isolated from a single cercaria could be diluted at least 1:50 and still yield a positive result via gel electrophoresis. An even more sensitive nested PCR also was developed that routinely detected 100 fg of the 290-bp fragment. The assay did not detect furcocercous cercariae of certain Schistosomatidae, Echinostoma sp., or Sphaeridiotrema globulus nor adults of Clinostomum sp. or Cyathocotyle bushiensis. Field testing of 137 P. trivolvis identified 3 positives with no overt environmental cross-reactivity, and results concurred with microscopic examinations in all cases. ?? American Society of Parasitologists 2007.</p>","language":"English","publisher":"American Society of Parasitologists","doi":"10.1645/GE-3584RN.1","issn":"00223395","usgsCitation":"Reinitz, D.M., Yoshino, T., and Cole, R.A., 2007, A Ribeiroia spp. (Class: Trematoda) - Specific PCR-based diagnostic: Journal of Parasitology, v. 93, no. 5, p. 1234-1238, https://doi.org/10.1645/GE-3584RN.1.","productDescription":"5 p.","startPage":"1234","endPage":"1238","numberOfPages":"5","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":456,"text":"National Wildlife Health Center","active":true,"usgs":true}],"links":[{"id":239986,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212494,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1645/GE-3584RN.1"}],"otherGeospatial":"North 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,{"id":70031347,"text":"70031347 - 2007 - Does body size influence nest attendance? A comparison of Ross's geese (Chen rossii) and the larger, sympatric lesser snow geese (C. caerulescens caerulescens)","interactions":[],"lastModifiedDate":"2012-03-12T17:21:13","indexId":"70031347","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2409,"text":"Journal of Ornithology","active":true,"publicationSubtype":{"id":10}},"title":"Does body size influence nest attendance? A comparison of Ross's geese (Chen rossii) and the larger, sympatric lesser snow geese (C. caerulescens caerulescens)","docAbstract":"The body-size hypothesis predicts that nest attendance is positively related to body size among waterfowl and that recess duration is inversely related to body size. Several physiological and behavioral characteristics of Ross's geese (Chen rossii) suggest that females of this species should maintain high nest attendance despite their relatively small body size. Accordingly, we used 8-mm films to compare the incubation behavior of Ross's geese to that of the larger, closely-related lesser snow geese (C. caerulescens caerulescens; hereafter, snow geese) nesting sympatrically at Karrak lake, Nunavut, Canada in 1993. We found that nest attendance averaged 99% for both species. Our results offer no support for the body-size hypothesis. We suggest that temperature requirements of embryos in relation to short incubation duration and a low foraging efficiency of females select for high nest attendance in both snow geese and Ross's geese. ?? Dt. Ornithologen-Gesellschaft e.V. 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Ornithology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10336-007-0169-6","issn":"00218375","usgsCitation":"Jonsson, J., Afton, A., and Alisauskas, R., 2007, Does body size influence nest attendance? A comparison of Ross's geese (Chen rossii) and the larger, sympatric lesser snow geese (C. caerulescens caerulescens): Journal of Ornithology, v. 148, no. 4, p. 549-555, https://doi.org/10.1007/s10336-007-0169-6.","startPage":"549","endPage":"555","numberOfPages":"7","costCenters":[],"links":[{"id":212464,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10336-007-0169-6"},{"id":239954,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"148","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-07-24","publicationStatus":"PW","scienceBaseUri":"505a038ce4b0c8380cd50527","contributors":{"authors":[{"text":"Jonsson, J.E.","contributorId":61623,"corporation":false,"usgs":true,"family":"Jonsson","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":431150,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Afton, A. D.","contributorId":83467,"corporation":false,"usgs":true,"family":"Afton","given":"A. D.","affiliations":[],"preferred":false,"id":431151,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Alisauskas, R.T.","contributorId":89645,"corporation":false,"usgs":true,"family":"Alisauskas","given":"R.T.","affiliations":[],"preferred":false,"id":431152,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031346,"text":"70031346 - 2007 - Lethal and sublethal effects of ammonia to juvenile Lampsilis mussels (Unionidae) in sediment and water-only exposures","interactions":[],"lastModifiedDate":"2012-03-12T17:21:13","indexId":"70031346","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1571,"text":"Environmental Toxicology and Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"Lethal and sublethal effects of ammonia to juvenile Lampsilis mussels (Unionidae) in sediment and water-only exposures","docAbstract":"We compared the sensitivity of two juvenile unionid mussels (Lampsilis cardium and Lampsilis higginsii) to ammonia in 96-h water-only and sediment tests by use of mortality and growth measurements. Twenty mussels were placed in chambers buried 2.5 cm into reference sediments to approximate pore-water exposure (sediment tests) or elevated above the bottom of the experimental units (water-only tests). In the sediment tests, a pH gradient existed between the overlying water (mean 8.0), sediment-water interface (mean 7.7), and 2.5 cm depth (mean 7.4). We assumed that mussels were exposed to ammonia in pore water and report effect concentrations in pore water, but if they were exposed to the higher pH water, more of the ammonia would be in the toxic un-ionized (NH 3) form. The only differences in toxicity and growth between mussel species occurred in some of the water-only tests. In sediment tests, median lethal concentrations (LC50s) ranged from 124 to 125 ??g NH3-N/L. In water-only tests, LC50s ranged from 157 to 372 ??g NH3-N/L. In sediment tests, median effective concentrations (EC50s based on growth) ranged from 30 to 32 ??g NH3-N/L. Juvenile mussels in the water-only tests grew poorly and did not exhibit a dose-response relation. These data demonstrate that growth is a sensitive and valuable endpoint for studies on ammonia toxicity with juvenile freshwater mussels and that growth should be measured via sediment tests. ?? 2007 SETAC.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Toxicology and Chemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1897/06-245R.1","issn":"07307268","usgsCitation":"Newton, T., and Bartsch, M., 2007, Lethal and sublethal effects of ammonia to juvenile Lampsilis mussels (Unionidae) in sediment and water-only exposures: Environmental Toxicology and Chemistry, v. 26, no. 10, p. 2057-2065, https://doi.org/10.1897/06-245R.1.","startPage":"2057","endPage":"2065","numberOfPages":"9","costCenters":[],"links":[{"id":212463,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1897/06-245R.1"},{"id":239953,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"26","issue":"10","noUsgsAuthors":false,"publicationDate":"2007-10-01","publicationStatus":"PW","scienceBaseUri":"505a4661e4b0c8380cd67627","contributors":{"authors":[{"text":"Newton, T.J.","contributorId":104428,"corporation":false,"usgs":true,"family":"Newton","given":"T.J.","email":"","affiliations":[],"preferred":false,"id":431149,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bartsch, M.R.","contributorId":42908,"corporation":false,"usgs":true,"family":"Bartsch","given":"M.R.","email":"","affiliations":[],"preferred":false,"id":431148,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031345,"text":"70031345 - 2007 - Identification of plasma glucocorticoids in pallid sturgeon in response to stress","interactions":[],"lastModifiedDate":"2012-03-12T17:21:13","indexId":"70031345","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1738,"text":"General and Comparative Endocrinology","active":true,"publicationSubtype":{"id":10}},"title":"Identification of plasma glucocorticoids in pallid sturgeon in response to stress","docAbstract":"Compared to teleosts, little is known about the stress response in chondrosteans, and the glucocorticoid(s) most responsive to stress have never been definitively determined in sturgeon. In terms of cortisol production, pallid sturgeon (Scaphirhynchus albus) have a low physiological response to stress compared to other sturgeons (Acipenser sp.). Because of this, our null hypothesis was that cortisol is not the predominant glucocorticoid secreted in response to stress in pallid sturgeon. Our objective was to identify the putative glucocorticoids present in the plasma of pallid sturgeon during the stress response. Pallid sturgeon were subjected to a severe confinement stress (12 h) with an additional handling stressor for the first 6 h. Control fish were not subjected to confinement but were handled only to collect blood. Blood plasma was collected at time 0, 6, and 12 h. Gas chromatography/mass spectrometry was used to screen the plasma for the spectrum of glucocorticoids and determine the putative steroid secreted during the stress response. Cortisol was the primary glucocorticoid detected in stressed pallid sturgeon. In addition, the cortisol metabolites cortisone, alloTHE (5??-pregnane-3??,17??,21-triol-11,20-dione), allo-??-cortolone (3??,17??,20??,21-tetrahydro-5??-pregnan-11-one), and allo-??-cortolone (3??,17??,20??,21-tetrahydro-5??-pregnan-11-one) were detected. Plasma cortisol increased from a resting concentration of 0.67 ng/ml to 10.66 ng/ml at 6 h followed by a decrease to 6.78 ng/ml by 12 h. Plasma glucose increased significantly by time 6 and 12 h in both stressed and unstressed groups and remained elevated at time 12 h, while resting lactate concentrations were low to non-detectable and did not increase significantly with the stressor over time. Cortisol was the primary glucocorticoid synthesized and secreted in response to a stressor in pallid sturgeon. Though the proportional increase in plasma cortisol in stressed pallid sturgeon was lower than many other species of sturgeon, the concentration was high enough to elicit a secondary stress response as seen by changes in plasma glucose. ?? 2007 Elsevier Inc. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"General and Comparative Endocrinology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.ygcen.2007.06.002","issn":"00166480","usgsCitation":"Webb, M., Allert, J., Kappenman, K., Marcos, J., Feist, G., Schreck, C., and Shackleton, C., 2007, Identification of plasma glucocorticoids in pallid sturgeon in response to stress: General and Comparative Endocrinology, v. 154, no. 1-3, p. 98-104, https://doi.org/10.1016/j.ygcen.2007.06.002.","startPage":"98","endPage":"104","numberOfPages":"7","costCenters":[],"links":[{"id":212432,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.ygcen.2007.06.002"},{"id":239920,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"154","issue":"1-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3836e4b0c8380cd614b1","contributors":{"authors":[{"text":"Webb, M.A.H.","contributorId":102241,"corporation":false,"usgs":true,"family":"Webb","given":"M.A.H.","affiliations":[],"preferred":false,"id":431147,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Allert, J.A.","contributorId":9843,"corporation":false,"usgs":true,"family":"Allert","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":431141,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kappenman, K.M.","contributorId":13412,"corporation":false,"usgs":true,"family":"Kappenman","given":"K.M.","affiliations":[],"preferred":false,"id":431143,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Marcos, J.","contributorId":100611,"corporation":false,"usgs":true,"family":"Marcos","given":"J.","email":"","affiliations":[],"preferred":false,"id":431146,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Feist, G.W.","contributorId":46261,"corporation":false,"usgs":true,"family":"Feist","given":"G.W.","email":"","affiliations":[],"preferred":false,"id":431144,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Schreck, C.B.","contributorId":11977,"corporation":false,"usgs":true,"family":"Schreck","given":"C.B.","email":"","affiliations":[],"preferred":false,"id":431142,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Shackleton, C.H.","contributorId":62832,"corporation":false,"usgs":true,"family":"Shackleton","given":"C.H.","email":"","affiliations":[],"preferred":false,"id":431145,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70031344,"text":"70031344 - 2007 - Cadmium ecophysiology in seven stonefly (Plecoptera) species: Delineating sources and estimating susceptibility","interactions":[],"lastModifiedDate":"2023-07-21T11:21:31.574014","indexId":"70031344","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Cadmium ecophysiology in seven stonefly (Plecoptera) species: Delineating sources and estimating susceptibility","docAbstract":"<div class=\"article_abstract\"><div class=\"container container_scaled-down\"><div class=\"row\"><div class=\"col-xs-12\"><div id=\"abstractBox\" class=\"article_abstract-content hlFld-Abstract\"><p class=\"articleBody_abstractText\">A major challenge in ecotoxicology lies in generating data under experimental conditions that are relevant to understanding contaminant effects in nature. Biodynamic modeling combines species-specific physiological traits to make predictions of metal bioaccumulation that fare well when tested in the field. We generated biodynamic models for seven predatory stonefly (Plecoptera) species representing the families Perlidae (5) and Perlodidae (2). Each taxon was exposed to cadmium independently via diet and via solution. Species varied approximately 2.6 fold in predicted steady-state cadmium concentrations. Diet was the predominant source of accumulated cadmium in five of the seven species and averaged 53.2 ± 9.6% and 90.2 ± 3.7% of net Cd accumulation in perlids and perlodids, respectively. Differences in Cd bioaccumulation between the two families were largely driven by differences in dissolved accumulation rates, which were considerably slower in perlodids than in perlids. We further examined the subcellular compartmentalization of Cd accumulated from independent aqueous and dietary exposures. Predicted steady-state concentrations were modified to only consider Cd accumulated in metal-sensitive subcellular compartments. These values ranged 5.3 fold. We discuss this variability within a phylogenetic context and its implications for bioassessment.</p></div></div></div></div></div>","language":"English","publisher":"American Chemical Society","doi":"10.1021/es071205b","issn":"0013936X","usgsCitation":"Martin, C., Luoma, S., Cain, D., and Buchwalter, D., 2007, Cadmium ecophysiology in seven stonefly (Plecoptera) species: Delineating sources and estimating susceptibility: Environmental Science & Technology, v. 41, no. 20, p. 7171-7177, https://doi.org/10.1021/es071205b.","productDescription":"7 p.","startPage":"7171","endPage":"7177","numberOfPages":"7","costCenters":[],"links":[{"id":239919,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"41","issue":"20","noUsgsAuthors":false,"publicationDate":"2007-09-06","publicationStatus":"PW","scienceBaseUri":"5059f2ede4b0c8380cd4b4ae","contributors":{"authors":[{"text":"Martin, C.A.","contributorId":17743,"corporation":false,"usgs":true,"family":"Martin","given":"C.A.","email":"","affiliations":[],"preferred":false,"id":431137,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Luoma, S. N.","contributorId":86353,"corporation":false,"usgs":true,"family":"Luoma","given":"S. N.","affiliations":[],"preferred":false,"id":431140,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Cain, D.J.","contributorId":68329,"corporation":false,"usgs":true,"family":"Cain","given":"D.J.","email":"","affiliations":[],"preferred":false,"id":431139,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Buchwalter, D.B.","contributorId":20053,"corporation":false,"usgs":true,"family":"Buchwalter","given":"D.B.","email":"","affiliations":[],"preferred":false,"id":431138,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031218,"text":"70031218 - 2007 - Measurements of storm and nonstorm circulation in the northern Adriatic: October 2002 Through April 2003","interactions":[],"lastModifiedDate":"2012-03-12T17:21:02","indexId":"70031218","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2315,"text":"Journal of Geophysical Research C: Oceans","active":true,"publicationSubtype":{"id":10}},"title":"Measurements of storm and nonstorm circulation in the northern Adriatic: October 2002 Through April 2003","docAbstract":"Fifteen bottom-mounted Acoustic Doppler Current Profilers were deployed from October 2002 through April 2003 in the northern Adriatic Sea. Average transport from the portion of the Western Adriatic Current (WAC) along the Italian slope was 0.1470 ?? 0.0043 Sv, punctuated by bursts of more than twice that amount during storm events. Monthly means were calculated with times of strong wind-driven circulation excluded. These suggest a 2002/2003 seasonal separation consisting of October, December through February, and March through April. An extreme Po River flood influenced November conditions making seasonal categorization difficult. October generally had more kinetic energy and more vertical structure than other months, and near-inertial waves were more frequent in April and October. The Eastern Adriatic Current (EAC)/WAC (i.e. inflow/outflow) system was clearly present in the means for all months. The cyclonic gyre north of the Po River was present October through February. Generally, in the WAC, over 50% of kinetic energy came from vertically uniform monthly mean flows. Elsewhere, eddy kinetic energy was stronger than mean kinetic energy with 10-40% contributions for vertically uniform monthly mean flows, 40-60% for vertically uniform monthly varying flows, and 10-30% for vertically varying monthly varying flows. Mean currents for bora storms indicate enhancement of the EAC/WAC and the cyclonic northern gyre, a shift toward Kvarner Bay in EAC direction, a circulation null point south of the Po, and double-gyre bifurcation of flow at Istria. Strengthening of both the EAC and WAC also occurs during sirocco storms. Copyright 2007 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research C: Oceans","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2006JC003556","issn":"01480227","usgsCitation":"Book, J., Signell, R.P., and Perkins, H., 2007, Measurements of storm and nonstorm circulation in the northern Adriatic: October 2002 Through April 2003: Journal of Geophysical Research C: Oceans, v. 112, no. 11, https://doi.org/10.1029/2006JC003556.","costCenters":[],"links":[{"id":211657,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2006JC003556"},{"id":238987,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"112","issue":"11","noUsgsAuthors":false,"publicationDate":"2007-11-16","publicationStatus":"PW","scienceBaseUri":"505a5336e4b0c8380cd6c94c","contributors":{"authors":[{"text":"Book, J.W.","contributorId":24566,"corporation":false,"usgs":true,"family":"Book","given":"J.W.","affiliations":[],"preferred":false,"id":430572,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Signell, R. P.","contributorId":89147,"corporation":false,"usgs":true,"family":"Signell","given":"R.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":430573,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Perkins, H.","contributorId":101871,"corporation":false,"usgs":true,"family":"Perkins","given":"H.","email":"","affiliations":[],"preferred":false,"id":430574,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
]}