{"pageNumber":"979","pageRowStart":"24450","pageSize":"25","recordCount":68937,"records":[{"id":70031806,"text":"70031806 - 2007 - Evidence for and implications of sedimentary diapirism and mud volcanism in the southern Utopia highland-lowland boundary plain, Mars","interactions":[],"lastModifiedDate":"2018-12-05T08:55:58","indexId":"70031806","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1963,"text":"Icarus","active":true,"publicationSubtype":{"id":10}},"title":"Evidence for and implications of sedimentary diapirism and mud volcanism in the southern Utopia highland-lowland boundary plain, Mars","docAbstract":"<p><span>Several types of spatially associated landforms in the southern Utopia Planitia highland–lowland boundary (HLB)&nbsp;plain&nbsp;appear to have resulted from localized geologic activity, including (1) fractured rises, (2) elliptical mounds, (3) pitted cones with emanating lobate materials, and (4) isolated and coalesced cavi (depressions). Stratigraphic analysis indicates these features are Hesperian or younger and may be associated with resurfacing that preferentially destroyed smaller (</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;><mo is=&quot;true&quot;>&amp;lt;</mo><mn is=&quot;true&quot;>8</mn><mtext is=&quot;true&quot;></mtext><mtext is=&quot;true&quot;>km</mtext></math>\"><span class=\"MJX_Assistive_MathML\">&lt;8km</span></span></span><span>&nbsp;diameter) impact&nbsp;craters. Based on landform geomorphologies and&nbsp;spatial distributions, the documented features do not appear to be specifically related to igneous or&nbsp;periglacial processes&nbsp;or the back-wasting and erosion of the HLB&nbsp;scarp. We propose that these features are genetically related to and formed by sedimentary (mud)&nbsp;diapirs&nbsp;that ascended from zones of regionally confined, poorly consolidated, and mechanically weak material. We note morphologic similarities between the mounds and pitted cones of the southern Utopia boundary plain and terrestrial mud&nbsp;volcanoes&nbsp;in the Absheron&nbsp;Peninsula,&nbsp;Azerbaijan. These analogs provide a context for understanding the geological environments and processes that supported mud diapir-related modification of the HLB. In southern Utopia, mud diapirs near the Elysium volcanic edifice may have resulted in laccolith-like intrusions that produced the fractured rises, while in the central boundary plain mud diapirs could have extruded to form pitted cones, mounds, and lobate flows, perhaps related to compressional stresses that account for wrinkle ridges. The removal of material a few kilometers deep by diapiric processes may have resulted in&nbsp;subsidence&nbsp;and deformation of surface materials to form widespread cavi. Collectively, these inferences suggest that sedimentary&nbsp;diapirism&nbsp;and mud&nbsp;volcanism&nbsp;as well as related surface deformations could have been the dominant Hesperian mechanisms that altered the regional boundary plain. We discuss a model in which&nbsp;detritus&nbsp;would have accumulated thickly in the annular spaces between impact-generated structural rings of Utopia basin. We envision that these materials, and perhaps buried&nbsp;ejecta&nbsp;of Utopia basin, contained volatile-rich,&nbsp;low-density material&nbsp;that could provide the source material for the postulated sedimentary diapirs. Thick, water-rich, low-density sediments buried elsewhere along the HLB and within the lowland plains may account for similar landforms and resurfacing histories.</span></p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Icarus","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.icarus.2006.08.013","issn":"00191035","usgsCitation":"Skinner, J., and Tanaka, K.L., 2007, Evidence for and implications of sedimentary diapirism and mud volcanism in the southern Utopia highland-lowland boundary plain, Mars: Icarus, v. 186, no. 1, p. 41-59, https://doi.org/10.1016/j.icarus.2006.08.013.","productDescription":"19 p.","startPage":"41","endPage":"59","numberOfPages":"19","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":239680,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"Mars; Utopia Planitia","volume":"186","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0d36e4b0c8380cd52e9b","contributors":{"authors":[{"text":"Skinner, James A. 0000-0002-3644-7010 jskinner@usgs.gov","orcid":"https://orcid.org/0000-0002-3644-7010","contributorId":3187,"corporation":false,"usgs":true,"family":"Skinner","given":"James A.","email":"jskinner@usgs.gov","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":433207,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Tanaka, Kenneth L. ktanaka@usgs.gov","contributorId":610,"corporation":false,"usgs":true,"family":"Tanaka","given":"Kenneth","email":"ktanaka@usgs.gov","middleInitial":"L.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":433206,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031805,"text":"70031805 - 2007 - On the influence of substrate morphology and surface area on phytofauna","interactions":[],"lastModifiedDate":"2012-03-12T17:21:15","indexId":"70031805","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"title":"On the influence of substrate morphology and surface area on phytofauna","docAbstract":"The independent effects and interactions between substrate morphology and substrate surface area on invertebrate density or biomass colonizing artificial plant beds were assessed in a clear-water and a turbid playa lake in Castro County, Texas, USA. Total invertebrate density and biomass were consistently greater on filiform substrates than on laminar substrates with equivalent substrate surface areas. The relationship among treatments (substrates with different morphologies and surface areas) and response (invertebrate density or biomass) was assessed with equally spaced surface areas. Few statistically significant interactions between substrate morphology and surface area were detected, indicating that these factors were mostly independent from each other in their effect on colonizing invertebrates. Although infrequently, when substrate morphology and surface area were not independent, the effects of equally spaced changes in substrate surface area on the rate of change of phytofauna density or biomass per unit of substrate surface area were dependent upon substrate morphology. The absence of three-way interactions indicated that effects of substrate morphology and substrate area on phytofauna density or biomass were independent of environmental conditions outside and inside exclosures. ?? 2006 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrobiologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10750-006-0359-x","issn":"00188158","usgsCitation":"Becerra-Munoz, S., and Schramm, H., 2007, On the influence of substrate morphology and surface area on phytofauna: Hydrobiologia, v. 575, no. 1, p. 117-128, https://doi.org/10.1007/s10750-006-0359-x.","startPage":"117","endPage":"128","numberOfPages":"12","costCenters":[],"links":[{"id":212195,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10750-006-0359-x"},{"id":239645,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"575","issue":"1","noUsgsAuthors":false,"publicationDate":"2006-09-23","publicationStatus":"PW","scienceBaseUri":"505a6dd9e4b0c8380cd7535c","contributors":{"authors":[{"text":"Becerra-Munoz, S.","contributorId":12691,"corporation":false,"usgs":true,"family":"Becerra-Munoz","given":"S.","email":"","affiliations":[],"preferred":false,"id":433204,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schramm, H.L. Jr.","contributorId":103823,"corporation":false,"usgs":true,"family":"Schramm","given":"H.L.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":433205,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031802,"text":"70031802 - 2007 - High nutrient pulses, tidal mixing and biological response in a small California estuary: Variability in nutrient concentrations from decadal to hourly time scales","interactions":[],"lastModifiedDate":"2012-03-12T17:21:06","indexId":"70031802","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1587,"text":"Estuarine, Coastal and Shelf Science","active":true,"publicationSubtype":{"id":10}},"title":"High nutrient pulses, tidal mixing and biological response in a small California estuary: Variability in nutrient concentrations from decadal to hourly time scales","docAbstract":"Elkhorn Slough is a small estuary in Central California, where nutrient inputs are dominated by runoff from agricultural row crops, a golf course, and residential development. We examined the variability in nutrient concentrations from decadal to hourly time scales in Elkhorn Slough to compare forcing by physical and biological factors. Hourly data were collected using in situ nitrate analyzers and water quality data sondes, and two decades of monthly monitoring data were analyzed. Nutrient concentrations increased from the mid 1970s to 1990s as pastures and woodlands were converted to row crops and population increased in the watershed. Climatic variability was also a significant factor controlling interannual nutrient variability, with higher nutrient concentrations during wet than drought years. Elkhorn Slough has a Mediterranean climate with dry and rainy seasons. Dissolved inorganic nitrogen (DIN) concentrations were relatively low (10-70 ??mol L-1) during the dry season and high (20-160 ??mol L-1) during the rainy season. Dissolved inorganic phosphorus (DIP) concentrations showed the inverse pattern, with higher concentrations during the dry season. Pulsed runoff events were a consistent feature controlling nitrate concentrations during the rainy season. Peak nitrate concentrations lagged runoff events by 1 to 6 days. Tidal exchange with Monterey Bay was also an important process controlling nutrient concentrations, particularly near the mouth of the Slough. Biological processes had the greatest effect on nitrate concentrations during the dry season and were less important during the rainy season. While primary production was enhanced by nutrient pulses, chlorophyll a concentrations were not. We believe that the generally weak biological response compared to the strong physical forcing in Elkhorn Slough occurred because the short residence time and tidal mixing rapidly diluted nutrient pulses. ?? 2006 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Estuarine, Coastal and Shelf Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.ecss.2006.08.015","issn":"02727714","usgsCitation":"Caffrey, J., Chapin, T., Jannasch, H., and Haskins, J., 2007, High nutrient pulses, tidal mixing and biological response in a small California estuary: Variability in nutrient concentrations from decadal to hourly time scales: Estuarine, Coastal and Shelf Science, v. 71, no. 3-4, p. 368-380, https://doi.org/10.1016/j.ecss.2006.08.015.","startPage":"368","endPage":"380","numberOfPages":"13","costCenters":[],"links":[{"id":240157,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212641,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.ecss.2006.08.015"}],"volume":"71","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a30c1e4b0c8380cd5d8fb","contributors":{"authors":[{"text":"Caffrey, J.M.","contributorId":98750,"corporation":false,"usgs":true,"family":"Caffrey","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":433194,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chapin, T.P. 0000-0001-6587-0734","orcid":"https://orcid.org/0000-0001-6587-0734","contributorId":24142,"corporation":false,"usgs":true,"family":"Chapin","given":"T.P.","affiliations":[],"preferred":false,"id":433192,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Jannasch, H.W.","contributorId":89665,"corporation":false,"usgs":true,"family":"Jannasch","given":"H.W.","email":"","affiliations":[],"preferred":false,"id":433193,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Haskins, J.C.","contributorId":7473,"corporation":false,"usgs":true,"family":"Haskins","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":433191,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031801,"text":"70031801 - 2007 - Assessment of fecal pollution sources in a small northern-plains watershed using PCR and phylogenetic analyses of Bacteroidetes 16S rRNA gene","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70031801","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1619,"text":"FEMS Microbiology Ecology","onlineIssn":"1574-6941","printIssn":"0168-6496","active":true,"publicationSubtype":{"id":10}},"title":"Assessment of fecal pollution sources in a small northern-plains watershed using PCR and phylogenetic analyses of Bacteroidetes 16S rRNA gene","docAbstract":"We evaluated the efficacy, sensitivity, host-specificity, and spatial/temporal dynamics of human- and ruminant-specific 16S rRNA gene Bacteroidetes markers used to assess the sources of fecal pollution in a fecally impacted watershed. Phylogenetic analyses of 1271 fecal and environmental 16S rRNA gene clones were also performed to study the diversity of Bacteroidetes in this watershed. The host-specific assays indicated that ruminant feces were present in 28-54% of the water samples and in all sampling seasons, with increasing frequency in downstream sites. The human-targeted assays indicated that only 3-5% of the water samples were positive for human fecal signals, although a higher percentage of human-associated signals (19-24%) were detected in sediment samples. Phylogenetic analysis indicated that 57% of all water clones clustered with yet-to-be-cultured Bacteroidetes species associated with sequences obtained from ruminant feces, further supporting the prevalence of ruminant contamination in this watershed. However, since several clusters contained sequences from multiple sources, future studies need to consider the potential cosmopolitan nature of these bacterial populations when assessing fecal pollution sources using Bacteroidetes markers. Moreover, additional data is needed in order to understand the distribution of Bacteroidetes host-specific markers and their relationship to water quality regulatory standards. ?? 2006 Federation of European Microbiological Societies.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"FEMS Microbiology Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1574-6941.2006.00211.x","issn":"01686496","usgsCitation":"Lamendella, R., Domingo, J., Oerther, D., Vogel, J.R., and Stoeckel, D.M., 2007, Assessment of fecal pollution sources in a small northern-plains watershed using PCR and phylogenetic analyses of Bacteroidetes 16S rRNA gene: FEMS Microbiology Ecology, v. 59, no. 3, p. 651-660, https://doi.org/10.1111/j.1574-6941.2006.00211.x.","startPage":"651","endPage":"660","numberOfPages":"10","costCenters":[],"links":[{"id":477107,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1574-6941.2006.00211.x","text":"Publisher Index Page"},{"id":212611,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1574-6941.2006.00211.x"},{"id":240124,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"59","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ee2fe4b0c8380cd49bf5","contributors":{"authors":[{"text":"Lamendella, R.","contributorId":15833,"corporation":false,"usgs":true,"family":"Lamendella","given":"R.","email":"","affiliations":[],"preferred":false,"id":433186,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Domingo, J.W.S.","contributorId":88153,"corporation":false,"usgs":true,"family":"Domingo","given":"J.W.S.","email":"","affiliations":[],"preferred":false,"id":433189,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Oerther, D.B.","contributorId":93702,"corporation":false,"usgs":true,"family":"Oerther","given":"D.B.","email":"","affiliations":[],"preferred":false,"id":433190,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Vogel, J. R.","contributorId":21639,"corporation":false,"usgs":true,"family":"Vogel","given":"J.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":433187,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Stoeckel, D. M.","contributorId":84855,"corporation":false,"usgs":true,"family":"Stoeckel","given":"D.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":433188,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031777,"text":"70031777 - 2007 - Evasion of added isotopic mercury from a northern temperate lake","interactions":[],"lastModifiedDate":"2018-10-16T11:11:46","indexId":"70031777","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1571,"text":"Environmental Toxicology and Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"Evasion of added isotopic mercury from a northern temperate lake","docAbstract":"<p>Isotopically enriched Hg (90% 202Hg) was added to a small lake in Ontario, Canada, at a rate equivalent to approximately threefold the annual direct atmospheric deposition rate that is typical of the northeastern United States. The Hg spike was thoroughly mixed into the epilimnion in nine separate events at two-week intervals throughout the summer growing season for three consecutive years. We measured concentrations of spike and ambient dissolved gaseous Hg (DGM) concentrations in surface water and the rate of volatilization of Hg from the lake on four separate, week-long sampling periods using floating dynamic flux chambers. The relationship between empirically measured rates of spike-Hg evasion were evaluated as functions of DGM concentration, wind velocity, and solar illumination. No individual environmental variable proved to be a strong predictor of the evasion flux. The DGM-normalized flux (expressed as the mass transfer coefficient, k) varied with wind velocity in a manner consistent with existing models of evasion of volatile solutes from natural waters but was higher than model estimates at low wind velocity. The empirical data were used to construct a description of evasion flux as a function of total dissolved Hg, wind, and solar illumination. That model was then applied to data for three summers for the experiment to generate estimates of Hg re-emission from the lake surface to the atmosphere. Based on ratios of spike Hg to ambient Hg in DGM and dissolved total Hg pools, ratios of DGM to total Hg in spike and ambient Hg pools, and flux estimates of spike and ambient Hg, we concluded that the added Hg spike was chemically indistinguishable from the ambient Hg in its behavior. Approximately 45% of Hg added to the lake over the summer was lost via volatilization.&nbsp;</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Toxicology and Chemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1897/06-148R.1","issn":"07307268","usgsCitation":"Southworth, G., Lindberg, S., Hintelmann, H., Amyot, M., Poulain, A., Bogle, M., Peterson, M., Rudd, J., Harris, R., Sandilands, K., Krabbenhoft, D., and Olsen, M.L., 2007, Evasion of added isotopic mercury from a northern temperate lake: Environmental Toxicology and Chemistry, v. 26, no. 1, p. 53-60, https://doi.org/10.1897/06-148R.1.","productDescription":"8 p.","startPage":"53","endPage":"60","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":212311,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1897/06-148R.1"},{"id":239777,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Canada","city":"Ontario","volume":"26","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-01-01","publicationStatus":"PW","scienceBaseUri":"505a0d21e4b0c8380cd52e25","contributors":{"authors":[{"text":"Southworth, G.","contributorId":51095,"corporation":false,"usgs":true,"family":"Southworth","given":"G.","email":"","affiliations":[],"preferred":false,"id":433073,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lindberg, S.","contributorId":71341,"corporation":false,"usgs":true,"family":"Lindberg","given":"S.","email":"","affiliations":[],"preferred":false,"id":433076,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hintelmann, H.","contributorId":64423,"corporation":false,"usgs":true,"family":"Hintelmann","given":"H.","email":"","affiliations":[],"preferred":false,"id":433075,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Amyot, M.","contributorId":85404,"corporation":false,"usgs":true,"family":"Amyot","given":"M.","email":"","affiliations":[],"preferred":false,"id":433080,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Poulain, A.","contributorId":86171,"corporation":false,"usgs":true,"family":"Poulain","given":"A.","email":"","affiliations":[],"preferred":false,"id":433081,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Bogle, M.","contributorId":71384,"corporation":false,"usgs":true,"family":"Bogle","given":"M.","email":"","affiliations":[],"preferred":false,"id":433077,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Peterson, M.","contributorId":71514,"corporation":false,"usgs":true,"family":"Peterson","given":"M.","affiliations":[],"preferred":false,"id":433078,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Rudd, J.","contributorId":92054,"corporation":false,"usgs":true,"family":"Rudd","given":"J.","email":"","affiliations":[],"preferred":false,"id":433082,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Harris, R. 0000-0002-9247-0768","orcid":"https://orcid.org/0000-0002-9247-0768","contributorId":13382,"corporation":false,"usgs":true,"family":"Harris","given":"R.","affiliations":[],"preferred":false,"id":433072,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Sandilands, K.","contributorId":101456,"corporation":false,"usgs":true,"family":"Sandilands","given":"K.","affiliations":[],"preferred":false,"id":433083,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Krabbenhoft, David P. 0000-0003-1964-5020 dpkrabbe@usgs.gov","orcid":"https://orcid.org/0000-0003-1964-5020","contributorId":118001,"corporation":false,"usgs":true,"family":"Krabbenhoft","given":"David P.","email":"dpkrabbe@usgs.gov","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":677,"text":"Wisconsin Water Science Center","active":true,"usgs":true}],"preferred":false,"id":433079,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Olsen, Mark L.","contributorId":63852,"corporation":false,"usgs":true,"family":"Olsen","given":"Mark","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":433074,"contributorType":{"id":1,"text":"Authors"},"rank":12}]}}
,{"id":70031775,"text":"70031775 - 2007 - Origin of pingo-like features on the Beaufort Sea shelf and their possible relationship to decomposing methane gas hydrates","interactions":[],"lastModifiedDate":"2023-10-06T12:04:48.491142","indexId":"70031775","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1807,"text":"Geophysical Research Letters","active":true,"publicationSubtype":{"id":10}},"title":"Origin of pingo-like features on the Beaufort Sea shelf and their possible relationship to decomposing methane gas hydrates","docAbstract":"<div class=\"\"><div class=\"article-section__content en main\"><p><span class=\"paraNumber\">[1]<span>&nbsp;</span></span>The Arctic shelf is currently undergoing dramatic thermal changes caused by the continued warming associated with Holocene sea level rise. During this transgression, comparatively warm waters have flooded over cold permafrost areas of the Arctic Shelf. A thermal pulse of more than 10°C is still propagating down into the submerged sediment and may be decomposing gas hydrate as well as permafrost. A search for gas venting on the Arctic seafloor focused on pingo-like-features (PLFs) on the Beaufort Sea Shelf because they may be a direct consequence of gas hydrate decomposition at depth. Vibracores collected from eight PLFs had systematically elevated methane concentrations. ROV observations revealed streams of methane-rich gas bubbles coming from the crests of PLFs. We offer a scenario of how PLFs may be growing offshore as a result of gas pressure associated with gas hydrate decomposition.</p></div></div>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2006GL027977","issn":"00948276","usgsCitation":"Paull, C.K., Ussler, W., Dallimore, S., Blasco, S., Lorenson, T., Melling, H., Medioli, B., Nixon, F., and McLaughlin, F., 2007, Origin of pingo-like features on the Beaufort Sea shelf and their possible relationship to decomposing methane gas hydrates: Geophysical Research Letters, v. 34, no. 1, L01603, 5 p., https://doi.org/10.1029/2006GL027977.","productDescription":"L01603, 5 p.","costCenters":[],"links":[{"id":487032,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006gl027977","text":"Publisher Index Page"},{"id":239744,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Canada","otherGeospatial":"Beaufort Sea","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -140.904114772788,\n              70.21376494965077\n            ],\n            [\n              -140.904114772788,\n              68.05566376560725\n            ],\n            [\n              -130.79669289778812,\n              68.05566376560725\n            ],\n            [\n              -130.79669289778812,\n              70.21376494965077\n            ],\n            [\n              -140.904114772788,\n              70.21376494965077\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"34","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-01-05","publicationStatus":"PW","scienceBaseUri":"505a70ebe4b0c8380cd7633a","contributors":{"authors":[{"text":"Paull, C. K.","contributorId":86845,"corporation":false,"usgs":false,"family":"Paull","given":"C.","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":433065,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ussler, W. 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,{"id":70031744,"text":"70031744 - 2007 - Ultraviolet radiation and bio-optics in Crater Lake, Oregon","interactions":[],"lastModifiedDate":"2017-11-15T09:57:03","indexId":"70031744","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1919,"text":"Hydrobiologia","onlineIssn":"1573-5117","printIssn":"0018-8158","active":true,"publicationSubtype":{"id":10}},"title":"Ultraviolet radiation and bio-optics in Crater Lake, Oregon","docAbstract":"Crater Lake, Oregon, is a mid-latitude caldera lake famous for its depth (594 m) and blue color. Recent underwater spectral measurements of solar radiation (300-800 nm) support earlier observations of unusual transparency and extend these to UV-B wavelengths. New data suggest that penetration of solar UVR into Crater Lake has a significant ecological impact. Evidence includes a correlation between water column chlorophyll-a and stratospheric ozone since 1984, the scarcity of organisms in the upper water column, and apparent UV screening pigments in phytoplankton that vary with depth. The lowest UV-B diffuse attenuation coefficients (K d,320) were similar to those reported for the clearest natural waters elsewhere, and were lower than estimates for pure water published in 1981. Optical proxies for UVR attenuation were correlated with chlorophyll-a concentration (0-30 m) during typical dry summer months from 1984 to 2002. Using all proxies and measurements of UV transparency, decadal and longer cycles were apparent but no long-term trend since the first optical measurement in 1896. ?? 2007 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrobiologia","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10750-006-0348-0","issn":"00188158","usgsCitation":"Hargreaves, B., Girdner, S., Buktenica, M., Collier, R., Urbach, E., and Larson, G., 2007, Ultraviolet radiation and bio-optics in Crater Lake, Oregon: Hydrobiologia, v. 574, no. 1, p. 107-140, https://doi.org/10.1007/s10750-006-0348-0.","startPage":"107","endPage":"140","numberOfPages":"34","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":239743,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212280,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10750-006-0348-0"}],"volume":"574","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bbc0de4b08c986b3289d4","contributors":{"authors":[{"text":"Hargreaves, B.R.","contributorId":71391,"corporation":false,"usgs":true,"family":"Hargreaves","given":"B.R.","email":"","affiliations":[],"preferred":false,"id":432939,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Girdner, S.F.","contributorId":71773,"corporation":false,"usgs":true,"family":"Girdner","given":"S.F.","affiliations":[],"preferred":false,"id":432940,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Buktenica, M.W.","contributorId":68263,"corporation":false,"usgs":true,"family":"Buktenica","given":"M.W.","affiliations":[],"preferred":false,"id":432938,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Collier, R.W.","contributorId":98547,"corporation":false,"usgs":true,"family":"Collier","given":"R.W.","email":"","affiliations":[],"preferred":false,"id":432942,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Urbach, E.","contributorId":78568,"corporation":false,"usgs":true,"family":"Urbach","given":"E.","email":"","affiliations":[],"preferred":false,"id":432941,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Larson, G.L.","contributorId":103021,"corporation":false,"usgs":true,"family":"Larson","given":"G.L.","email":"","affiliations":[],"preferred":false,"id":432943,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031739,"text":"70031739 - 2007 - Comparison of local- to regional-scale estimates of ground-water recharge in Minnesota, USA","interactions":[],"lastModifiedDate":"2023-10-03T11:20:41.383437","indexId":"70031739","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Comparison of local- to regional-scale estimates of ground-water recharge in Minnesota, USA","docAbstract":"<p><span>Regional ground-water recharge estimates for Minnesota were compared to estimates made on the basis of four local- and basin-scale methods. Three local-scale methods (unsaturated-zone water balance, water-table fluctuations (WTF) using three approaches, and age dating of ground water) yielded point estimates of recharge that represent spatial scales from about 1 to about 1000&nbsp;m</span><sup>2</sup><span>. A fourth method (RORA, a basin-scale analysis of streamflow records using a recession-curve-displacement technique) yielded recharge estimates at a scale of 10&ndash;1000s of km</span><sup>2</sup><span>. The RORA basin-scale recharge estimates were regionalized to estimate recharge for the entire State of Minnesota on the basis of a regional regression recharge (RRR) model that also incorporated soil and climate data. Recharge rates estimated by the RRR model compared favorably to the local and basin-scale recharge estimates. RRR estimates at study locations were about 41% less on average than the unsaturated-zone water-balance estimates, ranged from 44% greater to 12% less than estimates that were based on the three WTF approaches, were about 4% less than the age dating of ground-water estimates, and were about 5% greater than the RORA estimates. Of the methods used in this study, the WTF method is the simplest and easiest to apply. Recharge estimates made on the basis of the UZWB method were inconsistent with the results from the other methods. Recharge estimates using the RRR model could be a good source of input for regional ground-water flow models; RRR model results currently are being applied for this purpose in USGS studies elsewhere.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.jhydrol.2006.10.010","issn":"00221694","usgsCitation":"Delin, G., Healy, R.W., Lorenz, D., and Nimmo, J., 2007, Comparison of local- to regional-scale estimates of ground-water recharge in Minnesota, USA: Journal of Hydrology, v. 334, no. 1-2, p. 231-249, https://doi.org/10.1016/j.jhydrol.2006.10.010.","productDescription":"19 p.","startPage":"231","endPage":"249","numberOfPages":"19","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":392,"text":"Minnesota Water Science Center","active":true,"usgs":true}],"links":[{"id":239641,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United 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 \"}}]}","volume":"334","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f870e4b0c8380cd4d0de","contributors":{"authors":[{"text":"Delin, G. N.","contributorId":12834,"corporation":false,"usgs":true,"family":"Delin","given":"G. N.","affiliations":[],"preferred":false,"id":432922,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Healy, R. W.","contributorId":89872,"corporation":false,"usgs":true,"family":"Healy","given":"R.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":432924,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lorenz, D. L.","contributorId":10776,"corporation":false,"usgs":true,"family":"Lorenz","given":"D. L.","affiliations":[],"preferred":false,"id":432921,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nimmo, J. R. 0000-0001-8191-1727","orcid":"https://orcid.org/0000-0001-8191-1727","contributorId":58304,"corporation":false,"usgs":true,"family":"Nimmo","given":"J. R.","affiliations":[],"preferred":false,"id":432923,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031733,"text":"70031733 - 2007 - Toward a transport-based analysis of nutrient spiraling and uptake in streams","interactions":[],"lastModifiedDate":"2023-12-07T16:44:26.266653","indexId":"70031733","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2622,"text":"Limnology and Oceanography: Methods","active":true,"publicationSubtype":{"id":10}},"title":"Toward a transport-based analysis of nutrient spiraling and uptake in streams","docAbstract":"<p><span>Nutrient addition experiments are designed to study the cycling of nutrients in stream ecosystems where hydrologic and nonhydrologic processes determine nutrient fate. Because of the importance of hydrologic processes in stream ecosystems, a conceptual model known as nutrient spiraling is frequently employed. A central part of the nutrient spiraling approach is the determination of uptake length (</span><i>S</i><sub><i>w</i></sub><span>), the average distance traveled by dissolved nutrients in the water column before uptake. Although the nutrient spiraling concept has been an invaluable tool in stream ecology, the current practice of estimating uptake length from steady‐state nutrient data using linear regression (called here the “</span><i>S</i><sub><i>w</i></sub><span>&nbsp;approach”) presents a number of limitations. These limitations are identified by comparing the exponential&nbsp;</span><i>S</i><sub><i>w</i></sub><span>&nbsp;equation with analytical solutions of a stream solute transport model. This comparison indicates that (1)&nbsp;</span><i>S</i><sub><i>w</i></sub><span>&nbsp;is an aggregate measure of uptake that does not distinguish between main channel and storage zone processes, (2)&nbsp;</span><i>S</i><sub><i>w</i></sub><span>&nbsp;is an integrated measure of numerous hydrologic and nonhydrologic processes—this process integration may lead to difficulties in interpretation when comparing estimates of&nbsp;</span><i>S</i><sub><i>w</i></sub><span>, and (3) estimates of uptake velocity and areal uptake rate (</span><i>v</i><sub><i>f</i></sub><span>&nbsp;and&nbsp;</span><i>U</i><span>) based on&nbsp;</span><i>S</i><sub><i>w</i></sub><span>&nbsp;are not independent of system hydrology. Given these findings, a transport‐based approach to nutrient spiraling is presented for steady‐state and time‐series data sets. The transport‐based approach for time‐series data sets is suggested for future research on nutrient uptake as it provides a number of benefits, including the ability to (1) separately quantify main channel and storage zone uptake, (2) quantify specific hydrologic and nonhydrologic processes using various model parameters (process separation), (3) estimate uptake velocities and areal uptake rates that are independent of hydrologic effects, and (4) use shortterm, non‐plateau nutrient additions such that the effects of regeneration and mineralization are minimized. In summary, the transport‐based, time‐series approach provides a means of estimating traditional measures of nutrient uptake (</span><i>S</i><sub><i>w</i></sub><span>,&nbsp;</span><i>v</i><sub><i>f</i></sub><span>&nbsp;,&nbsp;</span><i>U</i><span>) while providing additional information on the location and magnitude of uptake (main channel versus storage zone). Application of the transport‐based approach to time‐series data from Green Creek, Antarctica, indicates that the bulk of nitrate uptake (~74% to 100%) occurred within the main channel where benthic uptake by algal mats is a likely process. Substantial uptake (~26%) also occurred in the storage zone of one reach, where uptake is attributed to the microbial community.</span></p>","language":"English","publisher":"ASLO","doi":"10.4319/lom.2007.5.50","usgsCitation":"Runkel, R.L., 2007, Toward a transport-based analysis of nutrient spiraling and uptake in streams: Limnology and Oceanography: Methods, v. 5, no. 1, p. 50-62, https://doi.org/10.4319/lom.2007.5.50.","productDescription":"13 p.","startPage":"50","endPage":"62","numberOfPages":"13","costCenters":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240083,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"5","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-01-22","publicationStatus":"PW","scienceBaseUri":"505bb5b2e4b08c986b326834","contributors":{"authors":[{"text":"Runkel, Robert L. 0000-0003-3220-481X runkel@usgs.gov","orcid":"https://orcid.org/0000-0003-3220-481X","contributorId":685,"corporation":false,"usgs":true,"family":"Runkel","given":"Robert","email":"runkel@usgs.gov","middleInitial":"L.","affiliations":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true}],"preferred":true,"id":432902,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70031720,"text":"70031720 - 2007 - Identifying biotic integrity and water chemistry relations in nonwadeable rivers of Wisconsin: Toward the development of nutrient criteria","interactions":[],"lastModifiedDate":"2018-02-06T12:19:59","indexId":"70031720","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1547,"text":"Environmental Management","active":true,"publicationSubtype":{"id":10}},"title":"Identifying biotic integrity and water chemistry relations in nonwadeable rivers of Wisconsin: Toward the development of nutrient criteria","docAbstract":"We sampled 41 sites on 34 nonwadeable rivers that represent the types of rivers in Wisconsin, and the kinds and intensities of nutrient and other anthropogenic stressors upon each river type. Sites covered much of United States Environmental Protection Agency national nutrient ecoregions VII-Mostly Glaciated Dairy Region, and VIII-Nutrient Poor, Largely Glaciated upper Midwest. Fish, macroinvertebrates, and three categories of environmental variables including nutrients, other water chemistry, and watershed features were collected using standard protocols. We summarized fish assemblages by index of biotic integrity (IBI) and its 10 component measures, and macroinvertebrates by 2 organic pollution tolerance and 12 proportional richness measures. All biotic and environmental variables represented a wide range of conditions, with biotic measures ranging from poor to excellent status, despite nutrient concentrations being consistently higher than reference concentrations reported for the regions. Regression tree analyses of nutrients on a suite of biotic measures identified breakpoints in total phosphorus (~0.06 mg/l) and total nitrogen (~0.64 mg/l) concentrations at which biotic assemblages were consistently impaired. Redundancy analyses (RDA) were used to identify the most important variables within each of the three environmental variable categories, which were then used to determine the relative influence of each variable category on the biota. Nutrient measures, suspended chlorophyll a, water clarity, and watershed land cover type (forest or row-crop agriculture) were the most important variables and they explained significant amounts of variation within the macroinvertebrate (R 2 = 60.6%) and fish (R 2 = 43.6%) assemblages. The environmental variables selected in the macroinvertebrate model were correlated to such an extent that partial RDA analyses could not attribute variation explained to individual environmental categories, assigning 89% of the explained variation to interactions among the categories. In contrast, partial RDA attributed much of the explained variation to the nutrient (25%) and other water chemistry (38%) categories for the fish model. Our analyses suggest that it would be beneficial to develop criteria based upon a suite of biotic and nutrient variables simultaneously to deem waters as not meeting their designated uses. ?? 2007 Springer Science+Business Media, LLC.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s00267-006-0452-y","issn":"0364152X","usgsCitation":"Weigel, B., and Robertson, D.M., 2007, Identifying biotic integrity and water chemistry relations in nonwadeable rivers of Wisconsin: Toward the development of nutrient criteria: Environmental Management, v. 40, no. 4, p. 691-708, https://doi.org/10.1007/s00267-006-0452-y.","startPage":"691","endPage":"708","numberOfPages":"18","costCenters":[],"links":[{"id":239874,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212397,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s00267-006-0452-y"}],"volume":"40","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-07-18","publicationStatus":"PW","scienceBaseUri":"505a3849e4b0c8380cd614f3","contributors":{"authors":[{"text":"Weigel, B.M.","contributorId":96483,"corporation":false,"usgs":true,"family":"Weigel","given":"B.M.","email":"","affiliations":[],"preferred":false,"id":432850,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Robertson, Dale M. 0000-0001-6799-0596 dzrobert@usgs.gov","orcid":"https://orcid.org/0000-0001-6799-0596","contributorId":150760,"corporation":false,"usgs":true,"family":"Robertson","given":"Dale","email":"dzrobert@usgs.gov","middleInitial":"M.","affiliations":[{"id":37947,"text":"Upper Midwest Water Science Center","active":true,"usgs":true}],"preferred":true,"id":432849,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031718,"text":"70031718 - 2007 - Microbial sulfate reduction and metal attenuation in pH 4 acid mine water","interactions":[],"lastModifiedDate":"2018-09-13T15:22:24","indexId":"70031718","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1755,"text":"Geochemical Transactions","active":true,"publicationSubtype":{"id":10}},"title":"Microbial sulfate reduction and metal attenuation in pH 4 acid mine water","docAbstract":"Sediments recovered from the flooded mine workings of the Penn Mine, a Cu-Zn mine abandoned since the early 1960s, were cultured for anaerobic bacteria over a range of pH (4.0 to 7.5). The molecular biology of sediments and cultures was studied to determine whether sulfate-reducing bacteria (SRB) were active in moderately acidic conditions present in the underground mine workings. Here we document multiple, independent analyses and show evidence that sulfate reduction and associated metal attenuation are occurring in the pH-4 mine environment. Water-chemistry analyses of the mine water reveal: (1) preferential complexation and precipitation by H2S of Cu and Cd, relative to Zn; (2) stable isotope ratios of 34S/32S and 18O/16O in dissolved SO4 that are 2-3 ??? heavier in the mine water, relative to those in surface waters; (3) reduction/oxidation conditions and dissolved gas concentrations consistent with conditions to support anaerobic processes such as sulfate reduction. Scanning electron microscope (SEM) analyses of sediment show 1.5-micrometer, spherical ZnS precipitates. Phospholipid fatty acid (PLFA) and denaturing gradient gel electrophoresis (DGGE) analyses of Penn Mine sediment show a high biomass level with a moderately diverse community structure composed primarily of iron- and sulfate-reducing bacteria. Cultures of sediment from the mine produced dissolved sulfide at pH values near 7 and near 4, forming precipitates of either iron sulfide or elemental sulfur. DGGE coupled with sequence and phylogenetic analysis of 16S rDNA gene segments showed populations of Desulfosporosinus and Desulfitobacterium in Penn Mine sediment and laboratory cultures. ?? 2007 Church et al; licensee BioMed Central Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geochemical Transactions","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1186/1467-4866-8-10","issn":"14674866","usgsCitation":"Church, C., Wilkin, R., Alpers, C.N., Rye, R.O., and Blaine, R., 2007, Microbial sulfate reduction and metal attenuation in pH 4 acid mine water: Geochemical Transactions, v. 8, https://doi.org/10.1186/1467-4866-8-10.","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":477149,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1186/1467-4866-8-10","text":"Publisher Index Page"},{"id":239838,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212365,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1186/1467-4866-8-10"}],"volume":"8","noUsgsAuthors":false,"publicationDate":"2007-10-23","publicationStatus":"PW","scienceBaseUri":"505a565fe4b0c8380cd6d54f","contributors":{"authors":[{"text":"Church, C.D.","contributorId":55583,"corporation":false,"usgs":true,"family":"Church","given":"C.D.","email":"","affiliations":[],"preferred":false,"id":432830,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wilkin, R.T.","contributorId":38300,"corporation":false,"usgs":true,"family":"Wilkin","given":"R.T.","email":"","affiliations":[],"preferred":false,"id":432829,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Alpers, Charles N. 0000-0001-6945-7365 cnalpers@usgs.gov","orcid":"https://orcid.org/0000-0001-6945-7365","contributorId":411,"corporation":false,"usgs":true,"family":"Alpers","given":"Charles","email":"cnalpers@usgs.gov","middleInitial":"N.","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":true,"id":432833,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rye, R. O.","contributorId":66208,"corporation":false,"usgs":true,"family":"Rye","given":"R.","email":"","middleInitial":"O.","affiliations":[],"preferred":false,"id":432831,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Blaine, R.B.","contributorId":77739,"corporation":false,"usgs":true,"family":"Blaine","given":"R.B.","email":"","affiliations":[],"preferred":false,"id":432832,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031710,"text":"70031710 - 2007 - Evidence of widespread natural reproduction by lake trout <i>Salvelinus namaycush</i> in the Michigan waters of Lake Huron","interactions":[],"lastModifiedDate":"2016-04-28T13:39:56","indexId":"70031710","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2330,"text":"Journal of Great Lakes Research","active":true,"publicationSubtype":{"id":10}},"title":"Evidence of widespread natural reproduction by lake trout <i>Salvelinus namaycush</i> in the Michigan waters of Lake Huron","docAbstract":"<p><span>Localized natural reproduction of lake trout&nbsp;</span><i>Salvelinus namaycush</i><span>&nbsp;in Lake Huron has occurred since the 1980s near Thunder Bay, Michigan. During 2004&ndash;2006, USGS spring and fall bottom trawl surveys captured 63 wild juvenile lake trout at depths ranging from 37&ndash;73 m at four of five ports in the Michigan waters of the main basin of Lake Huron, more than five times the total number captured in the previous 30-year history of the surveys. Relatively high catches of wild juvenile lake trout in bottom trawls during 2004&ndash;2006 suggest that natural reproduction by lake trout has increased and occurred throughout the Michigan waters of the main basin. Increased catches of wild juvenile lake trout in the USGS fall bottom trawl survey were coincident with a drastic decline in alewife abundance, but data were insufficient to determine what mechanism may be responsible for increased natural reproduction by lake trout. We recommend further monitoring of juvenile lake trout abundance and research into early life history of lake trout in Lake Huron.</span></p>","language":"English","publisher":"International Association for Great Lakes Research","doi":"10.3394/0380-1330(2007)33[917:EOWNRB]2.0.CO;2","issn":"03801330","usgsCitation":"Riley, S., He, J., Johnson, J., O’Brien, T.P., and Schaeffer, J., 2007, Evidence of widespread natural reproduction by lake trout <i>Salvelinus namaycush</i> in the Michigan waters of Lake Huron: Journal of Great Lakes Research, v. 33, no. 4, p. 917-921, https://doi.org/10.3394/0380-1330(2007)33[917:EOWNRB]2.0.CO;2.","productDescription":"5 p.","startPage":"917","endPage":"921","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":239710,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212250,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3394/0380-1330(2007)33[917:EOWNRB]2.0.CO;2"}],"volume":"33","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0d70e4b0c8380cd53007","contributors":{"authors":[{"text":"Riley, S.C.","contributorId":71378,"corporation":false,"usgs":true,"family":"Riley","given":"S.C.","email":"","affiliations":[],"preferred":false,"id":432792,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"He, J.X.","contributorId":7901,"corporation":false,"usgs":true,"family":"He","given":"J.X.","email":"","affiliations":[],"preferred":false,"id":432788,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Johnson, J.E.","contributorId":44857,"corporation":false,"usgs":true,"family":"Johnson","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":432791,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"O’Brien, T. P.","contributorId":22146,"corporation":false,"usgs":true,"family":"O’Brien","given":"T.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":432789,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Schaeffer, J.S.","contributorId":42688,"corporation":false,"usgs":true,"family":"Schaeffer","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":432790,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031704,"text":"70031704 - 2007 - Hydrogeologic controls on nitrate transport in a small agricultural catchment, Iowa","interactions":[],"lastModifiedDate":"2012-03-12T17:21:05","indexId":"70031704","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2319,"text":"Journal of Geophysical Research G: Biogeosciences","active":true,"publicationSubtype":{"id":10}},"title":"Hydrogeologic controls on nitrate transport in a small agricultural catchment, Iowa","docAbstract":"Effects of subsurface deposits on nitrate loss in stream riparian zones are recognized, but little attention has been focused on similar processes occurring in upland agricultural settings. In this paper, we evaluated hydrogeologic controls on nitrate transport processes occurring in a small 7.6 ha Iowa catchment. Subsurface deposits in the catchment consisted of upland areas of loess overlying weathered pre-Illinoian till, drained by two ephemeral drainageways that consisted of Holocene-age silty and organic rich alluvium. Water tables in upland areas fluctuated more than 4 m per year compared to less than 0.3 m in the drainageway. Water quality patterns showed a distinct spatial pattern, with groundwater in the drainageways having lower nitrate concentrations (<0.5 mg L-1 compared to upland areas (>10 mg L-1) as wells as lower pH, dissolved oxygen and redox, and higher ammonium and dissolved organic carbon levels. Several lines of evidence suggested that conditions are conducive for denitrification of groundwater flowing from uplands through the drainageways. Field-measured nitrate decay rates in the drainageways (???0.02 day-1) were consistent with other laboratory studies and regional patterns. Results from MODFLOW and MT3DMS simulations indicated that soils in the ephemeral drainageways could process all upland groundwater nitrate flowing through them. However, model-simulated tile drainage increased both water flux and nitrate loss from the upland catchment. Study results suggest that ephemeral drainageways can provide a natural nitrate treatment system in our upland glaciated catchments, offering management opportunities to reduce nitrate delivery to streams. Copyright 2007 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research G: Biogeosciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2007JG000405","issn":"01480227","usgsCitation":"Schilling, K.E., Tomer, M., Zhang, Y., Weisbrod, T., Jacobson, P., and Cambardella, C., 2007, Hydrogeologic controls on nitrate transport in a small agricultural catchment, Iowa: Journal of Geophysical Research G: Biogeosciences, v. 112, no. 3, https://doi.org/10.1029/2007JG000405.","costCenters":[],"links":[{"id":477263,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2007jg000405","text":"Publisher Index Page"},{"id":240153,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212637,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2007JG000405"}],"volume":"112","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a33a3e4b0c8380cd5f142","contributors":{"authors":[{"text":"Schilling, K. E.","contributorId":61982,"corporation":false,"usgs":true,"family":"Schilling","given":"K.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":432759,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Tomer, M.D.","contributorId":77359,"corporation":false,"usgs":true,"family":"Tomer","given":"M.D.","email":"","affiliations":[],"preferred":false,"id":432760,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zhang, Y.-K.","contributorId":44309,"corporation":false,"usgs":true,"family":"Zhang","given":"Y.-K.","email":"","affiliations":[],"preferred":false,"id":432758,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Weisbrod, T.","contributorId":30449,"corporation":false,"usgs":true,"family":"Weisbrod","given":"T.","email":"","affiliations":[],"preferred":false,"id":432757,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Jacobson, P.","contributorId":11412,"corporation":false,"usgs":true,"family":"Jacobson","given":"P.","affiliations":[],"preferred":false,"id":432756,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Cambardella, C.A.","contributorId":103874,"corporation":false,"usgs":true,"family":"Cambardella","given":"C.A.","email":"","affiliations":[],"preferred":false,"id":432761,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031700,"text":"70031700 - 2007 - Long-term performance of Aanderaa optodes and sea-bird SBE-43 dissolved-oxygen sensors bottom mounted at 32 m in Massachusetts Bay","interactions":[],"lastModifiedDate":"2019-12-03T12:54:21","indexId":"70031700","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2186,"text":"Journal of Atmospheric and Oceanic Technology","active":true,"publicationSubtype":{"id":10}},"title":"Long-term performance of Aanderaa optodes and sea-bird SBE-43 dissolved-oxygen sensors bottom mounted at 32 m in Massachusetts Bay","docAbstract":"<p><span>A field evaluation of two new dissolved-oxygen sensing technologies, the Aanderaa Instruments AS optode model 3830 and the Sea-Bird Electronics, Inc., model SBE43, was carried out at about 32-m water depth in western Massachusetts Bay. The optode is an optical sensor that measures fluorescence quenching by oxygen molecules, while the SBE43 is a Clark polarographic membrane sensor. Optodes were continuously deployed on bottom tripod frames by exchanging sensors every 4 months over a 19-month period. A Sea-Bird SBE43 was added during one 4-month deployment. These moored observations compared well with oxygen measurements from profiles collected during monthly shipboard surveys conducted by the Massachusetts Water Resources Authority. The mean correlation coefficient between the moored measurements and shipboard survey data was &gt;0.9, the mean difference was 0.06 mL L</span><sup>−1</sup><span>, and the standard deviation of the difference was 0.15 mL L</span><sup>−1</sup><span>. The correlation coefficient between the optode and the SBE43 was &gt;0.9 and the mean difference was 0.07 mL L</span><sup>−1</sup><span>. Optode measurements degraded when fouling was severe enough to block oxygen molecules from entering the sensing foil over a significant portion of the sensing window. Drift observed in two optodes beginning at about 225 and 390 days of deployment is attributed to degradation of the sensing foil. Flushing is necessary to equilibrate the Sea-Bird sensor. Power consumption by the SBE43 and required pump was 19.2 mWh per sample, and the optode consumed 0.9 mWh per sample, both within expected values based on manufacturers’ specifications.</span></p>","language":"English","publisher":"American Meteorological Society","doi":"10.1175/JTECH2078.1","usgsCitation":"Martini, M.A., Butman, B., and Mickelson, M.J., 2007, Long-term performance of Aanderaa optodes and sea-bird SBE-43 dissolved-oxygen sensors bottom mounted at 32 m in Massachusetts Bay: Journal of Atmospheric and Oceanic Technology, v. 24, no. 11, p. 1924-1935, https://doi.org/10.1175/JTECH2078.1.","productDescription":"12 p.","startPage":"1924","endPage":"1935","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true},{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":477086,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1175/jtech2078.1","text":"Publisher Index Page"},{"id":240080,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Massachusetts","otherGeospatial":"Massachusetts Bay","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -71.03759765625,\n              41.64007838467894\n            ],\n            [\n              -69.686279296875,\n              41.64007838467894\n            ],\n            [\n              -69.686279296875,\n              42.84375132629021\n            ],\n            [\n              -71.03759765625,\n              42.84375132629021\n            ],\n            [\n              -71.03759765625,\n              41.64007838467894\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"24","issue":"11","noUsgsAuthors":false,"publicationDate":"2007-11-01","publicationStatus":"PW","scienceBaseUri":"505a49a1e4b0c8380cd6877d","contributors":{"authors":[{"text":"Martini, Marinna A. 0000-0002-7757-5158 mmartini@usgs.gov","orcid":"https://orcid.org/0000-0002-7757-5158","contributorId":2456,"corporation":false,"usgs":true,"family":"Martini","given":"Marinna","email":"mmartini@usgs.gov","middleInitial":"A.","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":432746,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Butman, Bradford 0000-0002-4174-2073 bbutman@usgs.gov","orcid":"https://orcid.org/0000-0002-4174-2073","contributorId":943,"corporation":false,"usgs":true,"family":"Butman","given":"Bradford","email":"bbutman@usgs.gov","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":432744,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mickelson, Michael J.","contributorId":54020,"corporation":false,"usgs":true,"family":"Mickelson","given":"Michael","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":432745,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031699,"text":"70031699 - 2007 - Multiscale habitat selection by burrowing owls in black-tailed prairie dog colonies","interactions":[],"lastModifiedDate":"2012-03-12T17:21:11","indexId":"70031699","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Multiscale habitat selection by burrowing owls in black-tailed prairie dog colonies","docAbstract":"Some populations of western burrowing owls (Athene cunicularia hypugaea) have declined in recent decades. To design and implement effective recovery efforts, we need a better understanding of how distribution and demographic traits are influenced by habitat quality. To this end, we measured spatial patterns of burrowing owl breeding habitat selection within black-tailed prairie dog (Cynomys ludovicianus) colonies in northeastern Wyoming, USA. We compared burrow-, site-, colony-, and landscape-scale habitat parameters between burrowing owl nest burrows (n = 105) and unoccupied burrows (n = 85). We sampled 4 types of prairie dog colonies: 1) owl-occupied, active with prairie dogs (n = 16); 2) owl-occupied, inactive (n = 13); 3) owl-unoccupied, active (n = 14); and 4) owl-unoccupied, inactive (n = 14). We used an information-theoretic approach to examine a set of candidate models of burrowing owl nest-site selection. The model with the most support included variables at all 4 spatial scales, and results were consistent among the 4 types of prairie dog colonies. Nest burrows had longer tunnels, more available burrows within 30 m, and less shrub cover within 30 m, more prairie dog activity within 100 m, and were closer to water than unoccupied burrows. The model correctly classified 76% of cases, all model coefficients were stable, and the model had high predictive ability. Based on our results, we recommend actions to ensure persistence of the remaining prairie dog colonies as an important management strategy for burrowing owl conservation in the Great Plains of North America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Wildlife Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2193/2006-221","issn":"0022541X","usgsCitation":"Lantz, S., Conway, C., and Anderson, S., 2007, Multiscale habitat selection by burrowing owls in black-tailed prairie dog colonies: Journal of Wildlife Management, v. 71, no. 8, p. 2664-2672, https://doi.org/10.2193/2006-221.","startPage":"2664","endPage":"2672","numberOfPages":"9","costCenters":[],"links":[{"id":240047,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212547,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2193/2006-221"}],"volume":"71","issue":"8","noUsgsAuthors":false,"publicationDate":"2010-12-13","publicationStatus":"PW","scienceBaseUri":"505a6098e4b0c8380cd71575","contributors":{"authors":[{"text":"Lantz, S.J.","contributorId":96088,"corporation":false,"usgs":true,"family":"Lantz","given":"S.J.","email":"","affiliations":[],"preferred":false,"id":432743,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Conway, C.J.","contributorId":33417,"corporation":false,"usgs":true,"family":"Conway","given":"C.J.","email":"","affiliations":[],"preferred":false,"id":432741,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Anderson, S.H.","contributorId":33667,"corporation":false,"usgs":true,"family":"Anderson","given":"S.H.","email":"","affiliations":[],"preferred":false,"id":432742,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031695,"text":"70031695 - 2007 - Temporal changes of populations and trophic relationships of wintering diving ducks in Chesapeake Bay","interactions":[],"lastModifiedDate":"2016-08-24T16:18:56","indexId":"70031695","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3731,"text":"Waterbirds","onlineIssn":"19385390","printIssn":"15244695","active":true,"publicationSubtype":{"id":10}},"title":"Temporal changes of populations and trophic relationships of wintering diving ducks in Chesapeake Bay","docAbstract":"Population and trophic relationships among diving ducks in Chesapeake Bay are diverse and complex as they include five species of bay ducks (Aythya spp.), nine species of seaducks (Tribe Mergini), and the Ruddy Duck (Oxyura jamaicensis). Here we considered the relationships between population changes and diet over the past half century to assess the importance of prey changes to wintering waterfowl in the Bay. Food habits of 643 diving ducks collected from Chesapeake Bay during 1999-2006 were determined by analyses of their gullet (esophagus and proventriculus) and gizzard contents and compared to historical data (1885-1979) of 1,541 diving ducks. Aerial waterfowl surveys, in general, suggest that six species of seaducks were more commonly located in the meso- to polyhaline areas of the Bay, whereas five species of bay ducks and Ruddy Ducks were in the oligo- to mesohaline areas. Seaducks fed on a molluscan diet of Hooked Mussel (Ischadium recurvum), Amethyst Gemclam (Gemma gemma), and Dwarf Surfclarn (Mulinia lateralis). Bay ducks and Ruddy Ducks fed more on Baltic Macoma (Macoma balthica), the adventive Atlantic Rangia (Rangia cuneata), and submerged aquatic vegetation (SAV). Mergansers were found over the widest salinity range in the Bay, probably because of their piscivorous diet. Each diving duck species appears to fill a unique foraging niche, although there is much overlap of selected prey. When current food habits are compared to historic data, only the Canvasback (Aythya valisineria) has had major diet changes, although SAV now accounts for less food volume for all diving duck species, except the Redhead (Aythya americana). Understanding the trophic-habitat relationships of diving ducks in coastal wintering areas will give managers a better understanding of the ecological effects of future environmental changes. Intensive restoration efforts on SAV and oyster beds should greatly benefit diving duck populations.","language":"English","publisher":"The Waterbird Society","doi":"10.1675/1524-4695(2007)030[0004:TCOPAT]2.0.CO;2","issn":"15244695","usgsCitation":"Perry, M., Wells-Berlin, A.M., Kidwell, D.M., and Osenton, P.C., 2007, Temporal changes of populations and trophic relationships of wintering diving ducks in Chesapeake Bay: Waterbirds, v. 30, no. sp1, p. 4-16, https://doi.org/10.1675/1524-4695(2007)030[0004:TCOPAT]2.0.CO;2.","productDescription":"13 p.","startPage":"4","endPage":"16","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":239975,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212484,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1675/1524-4695(2007)030[0004:TCOPAT]2.0.CO;2"}],"volume":"30","issue":"sp1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba506e4b08c986b320759","contributors":{"authors":[{"text":"Perry, Matthew C. 0000-0001-6452-9534","orcid":"https://orcid.org/0000-0001-6452-9534","contributorId":91601,"corporation":false,"usgs":true,"family":"Perry","given":"Matthew C.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":true,"id":432726,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wells-Berlin, Alicia M. 0000-0002-5275-3077","orcid":"https://orcid.org/0000-0002-5275-3077","contributorId":10918,"corporation":false,"usgs":true,"family":"Wells-Berlin","given":"Alicia","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":432725,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kidwell, David M.","contributorId":174041,"corporation":false,"usgs":false,"family":"Kidwell","given":"David","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":432728,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Osenton, Peter C.","contributorId":174040,"corporation":false,"usgs":false,"family":"Osenton","given":"Peter","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":432727,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031694,"text":"70031694 - 2007 - Restoration of waterbird habitats in Chesapeake Bay: Great expectations or Sisyphus revisited?","interactions":[],"lastModifiedDate":"2012-03-12T17:21:11","indexId":"70031694","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3731,"text":"Waterbirds","onlineIssn":"19385390","printIssn":"15244695","active":true,"publicationSubtype":{"id":10}},"title":"Restoration of waterbird habitats in Chesapeake Bay: Great expectations or Sisyphus revisited?","docAbstract":"In the past half century, many waterbird populations in Chesapeake Bay have declined or shifted ranges, indicating major ecological changes have occurred. While many studies have focused on the problems associated with environmental degradation such as the losses of coastal wetlands and submerged vegetation, a number of restoration efforts have been launched in the past few decades to reverse the \"sea of despair.\" Most pertinent to waterbirds, restoration of submerged aquatic vegetation (SAV) beds, tidal wetland restoration, oyster reef restoration, and island creation/restoration have benefited a number of species. State and federal agencies and non-government agencies have formed partnerships to spawn many projects ranging in size from less than 0.5 ha to ca. 1,000 ha. While most SAV, wetland, and oyster reef projects have struggled to different degrees over the past ten to twenty years with inconsistent methods, irregular monitoring, and unknown reasons for failures, recent improvements in techniques and application of adaptive management have been made. The large dredge-material island projects at Hart-Miller Island near Baltimore, Poplar Island west of Tilghman Island, Maryland, and Craney Island in Portsmouth, Virginia have provided large outdoor \"laboratories\" for wildlife, fishery, and wetland habitat creation. All three have proven to be important for nesting waterbirds and migrant shorebirds and waterfowl; however nesting populations at all three islands have been compromised to different degrees by predators. Restoration success for waterbirds and other natural resources depends on: (1) establishing realistic, quantifiable objectives and performance criteria, (2) continued monitoring and management (e.g., predator control), (3) targeted research to determine causality, and (4) careful evaluation under an adaptive management regime.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Waterbirds","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1675/1524-4695(2007)030[0163:ROWHIC]2.0.CO;2","issn":"15244695","usgsCitation":"Erwin, R., and Beck, R., 2007, Restoration of waterbird habitats in Chesapeake Bay: Great expectations or Sisyphus revisited?: Waterbirds, v. 30, no. SPEC. ISS. 1, p. 163-176, https://doi.org/10.1675/1524-4695(2007)030[0163:ROWHIC]2.0.CO;2.","startPage":"163","endPage":"176","numberOfPages":"14","costCenters":[],"links":[{"id":212452,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1675/1524-4695(2007)030[0163:ROWHIC]2.0.CO;2"},{"id":239942,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"30","issue":"SPEC. ISS. 1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aaad2e4b0c8380cd86551","contributors":{"authors":[{"text":"Erwin, R.M.","contributorId":57396,"corporation":false,"usgs":true,"family":"Erwin","given":"R.M.","email":"","affiliations":[],"preferred":false,"id":432724,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Beck, R.A.","contributorId":44246,"corporation":false,"usgs":true,"family":"Beck","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":432723,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031692,"text":"70031692 - 2007 - Spatial distribution of juvenile and adult female Tanner crabs (Chionoecetes bairdi) in a glacial fjord ecosystem: Implications for recruitment processes","interactions":[],"lastModifiedDate":"2018-03-29T11:10:42","indexId":"70031692","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1936,"text":"ICES Journal of Marine Science","active":true,"publicationSubtype":{"id":10}},"displayTitle":"Spatial distribution of juvenile and adult female Tanner crabs (<i>Chionoecetes bairdi</i>) in a glacial fjord ecosystem: Implications for recruitment processes","title":"Spatial distribution of juvenile and adult female Tanner crabs (Chionoecetes bairdi) in a glacial fjord ecosystem: Implications for recruitment processes","docAbstract":"<p><span>A systematic pot survey in Glacier Bay, Alaska, was conducted to characterize the spatial distribution of juvenile and adult female Tanner crabs, and their association with depth and temperature. The information was used to infer important recruitment processes for Tanner crabs in glaciated ecosystems. High-catch areas for juvenile and adult female Tanner crabs were identified using local autocorrelation statistics. Spatial segregation by size class corresponded to features in the glacial landscape: high-catch areas for juveniles were located at the distal ends of two narrow glacial fjords, and high-catch areas for adults were located in the open waters of the central Bay. Juvenile female Tanner crabs were found at nearly all sampled depths (15–439 m) and temperatures (4–8°C), but the biggest catches were at depths &lt;150 m where adults were scarce. Because adults may prey on or compete with juveniles, the distribution of juveniles could be influenced by the distribution of adults. Areas where adults or predators are scarce, such as glacially influenced fjords, could serve as refuges for juvenile Tanner crabs.</span></p>","language":"English","publisher":"Oxford Academic","doi":"10.1093/icesjms/fsm158","usgsCitation":"Nielsen, J., Taggart, S.J., Shirley, T.C., and Mondragon, J., 2007, Spatial distribution of juvenile and adult female Tanner crabs (Chionoecetes bairdi) in a glacial fjord ecosystem: Implications for recruitment processes: ICES Journal of Marine Science, v. 64, no. 9, p. 1772-1784, https://doi.org/10.1093/icesjms/fsm158.","productDescription":"13 p.","startPage":"1772","endPage":"1784","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":477073,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1093/icesjms/fsm158","text":"Publisher Index Page"},{"id":239907,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"64","issue":"9","noUsgsAuthors":false,"publicationDate":"2007-11-12","publicationStatus":"PW","scienceBaseUri":"505b946ee4b08c986b31aa9e","contributors":{"authors":[{"text":"Nielsen, J.K.","contributorId":84488,"corporation":false,"usgs":true,"family":"Nielsen","given":"J.K.","email":"","affiliations":[],"preferred":false,"id":432716,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Taggart, S. James","contributorId":30131,"corporation":false,"usgs":true,"family":"Taggart","given":"S.","email":"","middleInitial":"James","affiliations":[],"preferred":false,"id":432714,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Shirley, Thomas C.","contributorId":17409,"corporation":false,"usgs":false,"family":"Shirley","given":"Thomas","email":"","middleInitial":"C.","affiliations":[{"id":12548,"text":"University of Alaska Fairbanks, School of Fisheries and Ocean Sciences","active":true,"usgs":false}],"preferred":false,"id":432713,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Mondragon, Jennifer","contributorId":57580,"corporation":false,"usgs":false,"family":"Mondragon","given":"Jennifer","email":"","affiliations":[],"preferred":false,"id":432715,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031691,"text":"70031691 - 2007 - Preliminary identification of ground-water nitrate sources using nitrogen and carbon stable isotopes, Kansas","interactions":[],"lastModifiedDate":"2012-03-12T17:21:11","indexId":"70031691","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1358,"text":"Current Research in Earth Sciences","active":true,"publicationSubtype":{"id":10}},"title":"Preliminary identification of ground-water nitrate sources using nitrogen and carbon stable isotopes, Kansas","docAbstract":"Increasing nitrate-N in ground water is a problem in areas with limited ground-water supplies, such as central Kansas. Nitrate-N concentrations in ground water in the study area in Ellis County range from 0.9 to 26 mg/L. Calculated mean values observed in soil cores are 1.2-15 mg/kg. The ??15N signatures of the ground waters are more enriched (+16.8 to +28.7???) than those of the soils (+8.4 to +1 3.7???), strongly suggesting that nitrate-N sources are not from mineralized and labile nitrogen present in the unsaturated zone. Soil cores were collected near municipal wells to determine if soil nitrogen was a contributing source to the ground water. Increased ??15N of total nitrogen with depth suggests that microbial mineralization processes and possible denitrification or volatilization isotope enrichments have affected the observed ?? 15N signatures in the soil. However, the observed soil-nitrogen values are not of sufficient magnitude to explain the nitrate-N concentrations or associated ??15N values observed in the ground water. Stable carbon isotopes provide some supporting evidence that soils are not a major contributor to the observed nitrate-N concentration in the ground water. ?? 13C values of the dissolved organic carbon (DOC) in soils generally become more enriched with depth while corresponding ground-water ??13C (DOC) values are more depleted than in the overlying soils. Carbon isotope values of the soils are indicative of a C4 plant source that is enriched by microbial processes. The ??13C (DOC) of ground water indicates C3 values that may reflect impacts from animal-waste sources.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Current Research in Earth Sciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Townsend, M., and Macko, S., 2007, Preliminary identification of ground-water nitrate sources using nitrogen and carbon stable isotopes, Kansas: Current Research in Earth Sciences, v. 253, no. 3.","costCenters":[],"links":[{"id":239906,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"253","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a882ee4b0c8380cd7d783","contributors":{"authors":[{"text":"Townsend, M.A.","contributorId":88785,"corporation":false,"usgs":true,"family":"Townsend","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":432711,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Macko, S.A.","contributorId":105408,"corporation":false,"usgs":true,"family":"Macko","given":"S.A.","email":"","affiliations":[],"preferred":false,"id":432712,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031688,"text":"70031688 - 2007 - Role of aquifer heterogeneity in fresh groundwater discharge and seawater recycling: An example from the Carmel coast, Israel","interactions":[],"lastModifiedDate":"2014-10-09T10:15:05","indexId":"70031688","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":"Role of aquifer heterogeneity in fresh groundwater discharge and seawater recycling: An example from the Carmel coast, Israel","docAbstract":"A case study is shown in which the pattern of submarine groundwater discharge and of seawater recycling is controlled by local hydrogeological variability. The coastal aquifer in Dor Bay is composed of two units: a partly confined calcaranitic sandstone (Kurkar) and an overlying loose sand. Groundwater in the Kurkar has elevated activities of <sup>222</sup>Rn (∼390 dpm/L) and relatively low <sup>224</sup>Ra/<sup>223</sup>Ra activity ratios (3–4), while the sand groundwater is significantly less radiogenic (6–90 dpm/L) and shows higher <sup>224</sup>Ra/<sup>223</sup>Ra ratios. Groundwater discharging from sand-covered areas of the bay has salinities of 16–31 and an average <sup>222</sup>Rn activity of 168 dpm/L, which lies on a mixing line between Rn-rich Kurkar fresh water and Rn-poor seawater. Another key observation is that seawater infiltrates to some extent into onshore sand groundwater, while the fresh water within the submarine Kurkar can be traced up to 40 m offshore. This implies that while fresh water mainly discharges from the Kurkar unit, seawater recycling is limited to the loose sand, and that the discharge from sand-covered areas is a mixture of Kurkar water with recycled seawater. Advection rates from the bay floor were calculated from Rn time series and found to vary between 0 and 36 cm/d, correlating negatively with bay water depth. The average flux was 8.1 cm/d, and it did not seem to change much during March, May, and July 2006. The average amount of fresh water discharging to the bay was 5.0 m<sup>3</sup>/d per meter of shoreline. Radon activity in the sand groundwater also fluctuates due to influx of Kurkar-type groundwater.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research C: Oceans","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Wiley","doi":"10.1029/2007JC004112","issn":"01480227","usgsCitation":"Weinstein, Y., Burnett, W.C., Swarzenski, P., Shalem, Y., Yechieli, Y., and Herut, B., 2007, Role of aquifer heterogeneity in fresh groundwater discharge and seawater recycling: An example from the Carmel coast, Israel: Journal of Geophysical Research C: Oceans, v. 112, no. C12, C12016; 12 p., https://doi.org/10.1029/2007JC004112.","productDescription":"C12016; 12 p.","numberOfPages":"12","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":477150,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2007jc004112","text":"Publisher Index Page"},{"id":212394,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2007JC004112"},{"id":239871,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Israel","otherGeospatial":"Carmel Coast, Dor Bay","volume":"112","issue":"C12","noUsgsAuthors":false,"publicationDate":"2007-12-25","publicationStatus":"PW","scienceBaseUri":"505aae3ee4b0c8380cd87058","contributors":{"authors":[{"text":"Weinstein, Y.","contributorId":100186,"corporation":false,"usgs":true,"family":"Weinstein","given":"Y.","email":"","affiliations":[],"preferred":false,"id":432701,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Burnett, W. C.","contributorId":39779,"corporation":false,"usgs":false,"family":"Burnett","given":"W.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":432699,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Swarzenski, P.W. 0000-0003-0116-0578","orcid":"https://orcid.org/0000-0003-0116-0578","contributorId":29487,"corporation":false,"usgs":true,"family":"Swarzenski","given":"P.W.","affiliations":[],"preferred":false,"id":432698,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Shalem, Y.","contributorId":84971,"corporation":false,"usgs":true,"family":"Shalem","given":"Y.","affiliations":[],"preferred":false,"id":432700,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Yechieli, Y.","contributorId":23308,"corporation":false,"usgs":true,"family":"Yechieli","given":"Y.","email":"","affiliations":[],"preferred":false,"id":432697,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Herut, B.","contributorId":101444,"corporation":false,"usgs":true,"family":"Herut","given":"B.","affiliations":[],"preferred":false,"id":432702,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031687,"text":"70031687 - 2007 - Nutrient (N, P) loads and yields at multiple scales and subbasin types in the Yukon River basin, Alaska","interactions":[],"lastModifiedDate":"2018-01-30T19:37:24","indexId":"70031687","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2319,"text":"Journal of Geophysical Research G: Biogeosciences","active":true,"publicationSubtype":{"id":10}},"title":"Nutrient (N, P) loads and yields at multiple scales and subbasin types in the Yukon River basin, Alaska","docAbstract":"Loads and yields of dissolved and particulate nitrogen (N) and phosphorus (P) were measured and modeled at three locations on the Yukon River (YR) and on the Tanana and Porcupine Rivers in Alaska during 2001-2005. Total export of N and P upstream of Yukon Delta averaged 120 Gg N a-1 and 56 Gg P a-1, respectively, with 43.5% of total N (TN) as dissolved organic N, and 98% of total P (TP) as particulate phosphorus. Approximately half of the annual export of TN and TP occurred during spring. Hydrologic yields ofTN (5.6-13.3 mmol N m-2 a-1) and TP (0.8-9.0 mmol P m-2 a-1) were least in the Porcupine basin and greatest in the Tanana basin and were proportional to water yield. Comparison of current and historical dissolved organic matter (DOM) export from the basin indicates decreased DON export with respect to total water discharge during summer and autumn in recent decades. Any possible climate-related change in annual water discharge will result in proportional changes in N and P export.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research G: Biogeosciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2006JG000366","issn":"01480227","usgsCitation":"Dornblaser, M., and Striegl, R.G., 2007, Nutrient (N, P) loads and yields at multiple scales and subbasin types in the Yukon River basin, Alaska: Journal of Geophysical Research G: Biogeosciences, v. 112, no. 4, https://doi.org/10.1029/2006JG000366.","costCenters":[],"links":[{"id":477148,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006jg000366","text":"Publisher Index Page"},{"id":239837,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212364,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2006JG000366"}],"volume":"112","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-11-03","publicationStatus":"PW","scienceBaseUri":"505a6937e4b0c8380cd73c09","contributors":{"authors":[{"text":"Dornblaser, M.M.","contributorId":38765,"corporation":false,"usgs":true,"family":"Dornblaser","given":"M.M.","email":"","affiliations":[],"preferred":false,"id":432695,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Striegl, Robert G. 0000-0002-8251-4659 rstriegl@usgs.gov","orcid":"https://orcid.org/0000-0002-8251-4659","contributorId":1630,"corporation":false,"usgs":true,"family":"Striegl","given":"Robert","email":"rstriegl@usgs.gov","middleInitial":"G.","affiliations":[{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true},{"id":36183,"text":"Hydro-Ecological Interactions Branch","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":false,"id":432696,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031686,"text":"70031686 - 2007 - Geologic characteristics of the central stretch of the Ticona Channel, north-central Illinois","interactions":[],"lastModifiedDate":"2012-03-12T17:21:12","indexId":"70031686","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1541,"text":"Environmental Geosciences","active":true,"publicationSubtype":{"id":10}},"title":"Geologic characteristics of the central stretch of the Ticona Channel, north-central Illinois","docAbstract":"The Ticona Channel is located in north-central Illinois and occurs in Grundy, LaSalle, and Putnam counties. It is a buried bedrock valley that served as the principal paleodrainage system in north-central Illinois during the Illinoian and pre-Illinoian. This study focused on the part of the Ticona Channel within the Leonore 7.5??? Quadrangle. The geometry and stratigraphy of sediments that fill the Ticona Channel were investigated using high-resolution, shallow seismic reflection profiling, traditional field geologic mapping techniques, borehole data, and water-well-log data. The valley is about 2 km (1 mi) wide and approximately 60 m (200 ft) deep. The U-shape channel is straight, trends east-west, and has only one mappable tributary. The valley is carved into the Pennsylvanian Carbondale Formation in the eastern part of the study area; it has incised into the Ordovician Prairie du Chien Group in the west. At its base, the Ticona Channel is filled with the Pearl Formation, which is coarse-grained sand and gravel that was deposited during the Illinoian glaciation. The Pearl Formation is overlain by Illinoian till of the Glasford Formation and is capped by Wedron Group sediments from the Wisconsinan stage. Copyright ?? 2007. The American Association of Petroleum Geologists/Division of Environmental Geosciences. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Geosciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1306/eg.05030606002","issn":"10759565","usgsCitation":"Willems, B., Malone, D., and Pugin, A., 2007, Geologic characteristics of the central stretch of the Ticona Channel, north-central Illinois: Environmental Geosciences, v. 14, no. 3, p. 123-136, https://doi.org/10.1306/eg.05030606002.","startPage":"123","endPage":"136","numberOfPages":"14","costCenters":[],"links":[{"id":212363,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1306/eg.05030606002"},{"id":239836,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"14","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1935e4b0c8380cd558e9","contributors":{"authors":[{"text":"Willems, B.A.","contributorId":78208,"corporation":false,"usgs":true,"family":"Willems","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":432693,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Malone, D.H.","contributorId":92124,"corporation":false,"usgs":true,"family":"Malone","given":"D.H.","email":"","affiliations":[],"preferred":false,"id":432694,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Pugin, A.","contributorId":10953,"corporation":false,"usgs":true,"family":"Pugin","given":"A.","affiliations":[],"preferred":false,"id":432692,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031671,"text":"70031671 - 2007 - Cross-shelf transport of pink shrimp larvae: Interactions of tidal currents, larval vertical migrations and internal tides","interactions":[],"lastModifiedDate":"2016-03-30T13:29:29","indexId":"70031671","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2663,"text":"Marine Ecology Progress Series","active":true,"publicationSubtype":{"id":10}},"title":"Cross-shelf transport of pink shrimp larvae: Interactions of tidal currents, larval vertical migrations and internal tides","docAbstract":"<p><span>Transport and behavior of pink shrimp&nbsp;</span><i>Farfantepenaeu</i><span>s&nbsp;</span><i>duorarum</i><span>&nbsp;larvae were investigated on the southwestern Florida (SWF) shelf of the Gulf of Mexico between the Dry Tortugas spawning grounds and Florida Bay nursery grounds. Stratified plankton samples and hydrographic data were collected at 2 h intervals at 3 stations located on a cross-shelf transect. At the Marquesas station, midway between Dry Tortugas and Florida Bay, internal tides were recognized by anomalously cool water, a shallow thermocline with strong density gradients, strong current shear, and a high concentration of pink shrimp larvae at the shallow thermocline. Low Richardson numbers occurred at the pycnocline depth, indicating vertical shear instability and possible turbulent transport from the lower to the upper layer where myses and postlarvae were concentrated. Analysis of vertically stratified plankton suggested that larvae perform vertical migrations and the specific behavior changes ontogenetically; protozoeae were found deeper than myses, and myses deeper than postlarvae. Relative concentrations of protozoea in the upper, middle and bottom layers were consistent with a diel vertical migration, whereas that of postlarvae and myses were consistent with the semidiurnal tides in phase with the flood tide. Postlarvae, the shallowest dwellers that migrate with a semidiurnal periodicity, experienced the largest net onshore flux and larval concentrations were highly correlated with the cross-shelf current. These results provide the first evidence of an onshore tidal transport (a type of selective tidal stream transport, STST), in decapod larvae migrating in continental shelf waters offshore, ca. 100 km from the coast and at a depth of 20 m, while approaching the coastal nursery grounds. Longer time series would be necessary to establish whether internal tides play any role in the larval onshore transport of this species and determine if the STST is the dominant onshore transport mechanism.</span></p>","language":"English","publisher":"Inter-Research","publisherLocation":"Oldendorf/Luhe, Germany","doi":"10.3354/meps06916","issn":"01718630","usgsCitation":"Criales, M.M., Browder, J.A., Mooers, C., Robblee, M., Cardenas, H., and Jackson, T.L., 2007, Cross-shelf transport of pink shrimp larvae: Interactions of tidal currents, larval vertical migrations and internal tides: Marine Ecology Progress Series, v. 345, p. 167-184, https://doi.org/10.3354/meps06916.","productDescription":"18 p.","startPage":"167","endPage":"184","numberOfPages":"18","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":477140,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3354/meps06916","text":"Publisher Index Page"},{"id":239637,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212187,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3354/meps06916"}],"country":"United States","state":"Florida","otherGeospatial":"Dry Tortugas, Florida Bay","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -79.91455078125,\n              25.94816628853973\n            ],\n            [\n              -79.9200439453125,\n              25.54244147012483\n            ],\n            [\n              -80.2166748046875,\n              25.04081549894912\n            ],\n            [\n              -80.8648681640625,\n              24.56211235799689\n            ],\n            [\n              -81.5789794921875,\n              24.412140070651528\n            ],\n            [\n              -82.6336669921875,\n              24.382124181118236\n            ],\n            [\n              -83.07861328125,\n              24.45215015618098\n            ],\n            [\n              -83.1060791015625,\n              24.696934226366672\n            ],\n            [\n              -82.5787353515625,\n              24.806681353851964\n            ],\n            [\n              -81.3262939453125,\n              24.926294766395593\n            ],\n            [\n              -80.760498046875,\n              25.224820176765036\n            ],\n            [\n              -80.4364013671875,\n              25.606855993715016\n            ],\n            [\n              -80.343017578125,\n              25.849336891707605\n            ],\n            [\n              -80.2056884765625,\n              25.93828707492375\n            ],\n            [\n              -80.04638671875,\n              25.96792222903405\n            ],\n            [\n              -79.91455078125,\n              25.94816628853973\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"345","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fcc5e4b0c8380cd4e41a","contributors":{"authors":[{"text":"Criales, Maria M.","contributorId":69330,"corporation":false,"usgs":false,"family":"Criales","given":"Maria","email":"","middleInitial":"M.","affiliations":[{"id":12565,"text":"Rosenstiel School of Atomospheric Science, University of Miami","active":true,"usgs":false}],"preferred":false,"id":432605,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Browder, Joan A.","contributorId":7439,"corporation":false,"usgs":true,"family":"Browder","given":"Joan","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":432601,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mooers, C.N.K.","contributorId":13762,"corporation":false,"usgs":true,"family":"Mooers","given":"C.N.K.","email":"","affiliations":[],"preferred":false,"id":432603,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Robblee, M. B.","contributorId":23879,"corporation":false,"usgs":true,"family":"Robblee","given":"M. B.","affiliations":[],"preferred":false,"id":432604,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Cardenas, H.","contributorId":11411,"corporation":false,"usgs":true,"family":"Cardenas","given":"H.","email":"","affiliations":[],"preferred":false,"id":432602,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Jackson, Thomas L.","contributorId":93667,"corporation":false,"usgs":true,"family":"Jackson","given":"Thomas","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":432606,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031660,"text":"70031660 - 2007 - Seasonal variation in nutrient retention during inundation of a short-hydroperiod floodplain","interactions":[],"lastModifiedDate":"2012-03-12T17:21:11","indexId":"70031660","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3301,"text":"River Research and Applications","active":true,"publicationSubtype":{"id":10}},"title":"Seasonal variation in nutrient retention during inundation of a short-hydroperiod floodplain","docAbstract":"Floodplains are generally considered to be important locations for nutrient retention or inorganic-to-organic nutrient conversions in riverine ecosystems. However, little is known about nutrient processing in short-hydroperiod floodplains or seasonal variation in floodplain nutrient retention. Therefore, we quantified the net uptake, release or transformation of nitrogen (N), phosphorus (P) and suspended sediment species during brief periods (1-2 days) of overbank flooding through a 250-m floodplain flowpath on the fourth-order Mattawoman Creek, Maryland U.S.A. Sampling occurred during a winter, two spring and a summer flood in this largely forested watershed with low nutrient and sediment loading. Concentrations of NO3- increased significantly in surface water flowing over the floodplain in three of the four floods, suggesting the floodplain was a source of NO3-. The upper portion of the floodplain flowpath consistently exported NH4+, most likely due to the hyporheic: flushing of floodplain soil NH4+, which was then likely nitrified to NO3- in floodwaters. The floodplain was a sink for particulate organic P (POP) during two floods and particulate organic N and inorganic suspended sediment (ISS) during one flood. Large releases of all dissolved inorganic N and P species occurred following a snowmelt and subsequent cold winter flood. Although there was little consistency in most patterns of nutrient processing among the different floods, this floodplain, characterized by brief inundation, low residence time and low nutrient loading, behaved oppositely from the conceptual model for most floodplains in that it generally exported inorganic nutrients and imported organic nutrients.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"River Research and Applications","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/rra.1035","issn":"15351459","usgsCitation":"Noe, G., and Hupp, C., 2007, Seasonal variation in nutrient retention during inundation of a short-hydroperiod floodplain: River Research and Applications, v. 23, no. 10, p. 1088-1101, https://doi.org/10.1002/rra.1035.","startPage":"1088","endPage":"1101","numberOfPages":"14","costCenters":[],"links":[{"id":212483,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/rra.1035"},{"id":239974,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"10","noUsgsAuthors":false,"publicationDate":"2007-07-27","publicationStatus":"PW","scienceBaseUri":"505b88e9e4b08c986b316c27","contributors":{"authors":[{"text":"Noe, G.B.","contributorId":66464,"corporation":false,"usgs":true,"family":"Noe","given":"G.B.","email":"","affiliations":[],"preferred":false,"id":432563,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hupp, C.R. 0000-0003-1853-9197","orcid":"https://orcid.org/0000-0003-1853-9197","contributorId":78775,"corporation":false,"usgs":true,"family":"Hupp","given":"C.R.","affiliations":[],"preferred":false,"id":432564,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031656,"text":"70031656 - 2007 - Sandy signs of a tsunami's onshore depth and speed","interactions":[],"lastModifiedDate":"2014-08-27T11:54:22","indexId":"70031656","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":"Sandy signs of a tsunami's onshore depth and speed","docAbstract":"<p>Tsunamis rank among the most devastating and unpredictable natural hazards to affect coastal areas. Just 3 years ago, in December 2004, the Indian Ocean tsunami caused more than 225,000 deaths. Like many extreme events, however, destructive tsunamis strike rarely enough that written records span too little time to quantify tsunami hazard and risk. Tsunami deposits preserved in the geologic record have been used to extend the record of tsunami occurrence but not the magnitude of past events. To quantify tsunami hazard further, we asked the following question: Can ancient deposits also provide guidance on the expectable water depths and speeds for future tsunamis?</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Eos, Transactions American Geophysical Union","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Wiley","doi":"10.1029/2007EO520001","issn":"00963941","usgsCitation":"Huntington, K., Bourgeois, J., Gelfenbaum, G., Lynett, P., Jaffe, B., Yeh, H., and Weiss, R., 2007, Sandy signs of a tsunami's onshore depth and speed: Eos, Transactions, American Geophysical Union, v. 88, no. 52, p. 577-578, https://doi.org/10.1029/2007EO520001.","productDescription":"4 p.","startPage":"577","endPage":"578","numberOfPages":"4","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":476945,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2007eo520001","text":"Publisher Index Page"},{"id":239938,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212448,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2007EO520001"}],"volume":"88","issue":"52","noUsgsAuthors":false,"publicationDate":"2008-01-04","publicationStatus":"PW","scienceBaseUri":"505b86afe4b08c986b316093","contributors":{"authors":[{"text":"Huntington, K.","contributorId":66605,"corporation":false,"usgs":true,"family":"Huntington","given":"K.","email":"","affiliations":[],"preferred":false,"id":432537,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bourgeois, J.","contributorId":65771,"corporation":false,"usgs":true,"family":"Bourgeois","given":"J.","email":"","affiliations":[],"preferred":false,"id":432536,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gelfenbaum, G.","contributorId":72429,"corporation":false,"usgs":true,"family":"Gelfenbaum","given":"G.","email":"","affiliations":[],"preferred":false,"id":432538,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lynett, P.","contributorId":47981,"corporation":false,"usgs":true,"family":"Lynett","given":"P.","email":"","affiliations":[],"preferred":false,"id":432535,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Jaffe, B.","contributorId":78517,"corporation":false,"usgs":true,"family":"Jaffe","given":"B.","affiliations":[],"preferred":false,"id":432539,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Yeh, H.","contributorId":82621,"corporation":false,"usgs":true,"family":"Yeh","given":"H.","email":"","affiliations":[],"preferred":false,"id":432540,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Weiss, R.","contributorId":13902,"corporation":false,"usgs":true,"family":"Weiss","given":"R.","email":"","affiliations":[],"preferred":false,"id":432534,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
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