{"pageNumber":"966","pageRowStart":"24125","pageSize":"25","recordCount":68937,"records":[{"id":70030785,"text":"70030785 - 2007 - High arsenic concentrations and enriched sulfur and oxygen isotopes in a fractured-bedrock ground-water system","interactions":[],"lastModifiedDate":"2012-03-12T17:21:03","indexId":"70030785","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1213,"text":"Chemical Geology","active":true,"publicationSubtype":{"id":10}},"title":"High arsenic concentrations and enriched sulfur and oxygen isotopes in a fractured-bedrock ground-water system","docAbstract":"Ground water with high arsenic concentrations (up to 26.6????mol L- 1) has sulfate enriched in 34S and 18O in the fractured-bedrock, ground-water system of the Kelly's Cove watershed, Northport, Maine, USA. The ranges of sulfur and oxygen isotope values in aqueous sulfate, ??34S[SO4] and ??18O[SO4], at the Kelly's Cove watershed are + 3.4 to + 4.9??? and - 2.0 to + 6.7???, respectively. These isotope values are strikingly similar to those of the Goose River, Maine watershed which has ??34S[SO4] and ??18O[SO4] ranges of + 3.7 to + 4.6 ??? and - 2.6 to + 7.5???, respectively. In both systems, high arsenic concentrations occur with high ??34S[SO4] and ??18O[SO4] values, yet redox conditions and underlying rock types are quite different. The isotope values of sulfide minerals, ??34S[min], from four bedrock cores vary over short distances and range from - 5.1 to + 7.5???. The ??34S[SO4] values are controlled by the ??34S[min] values with minor input of atmospheric SO4. The much narrower range in ??34S[SO4] values than ??34S[min] values is probably due to sufficient ground-water mixing at a scale greater than the ??34S[min] variability. The ??34S[SO4] values are about 2??? higher than the average ??34S[min] value and fall within the range of ??34S[min] values, indicating only minor fractionation due to bacterial reduction of SO4. The highest ??18O[SO4] values were measured in the downgradient, confined, arsenic-rich ground water. High ??18O[SO4] values there cannot be due to aeration by atmospheric oxygen, but may arise from reoxidation of reduced SO4 products. The enrichment factors of ??18O in SO4 compared to H2O, + 7.2 to + 15.5???, in the Kelly's Cove ground water and the negligible 34S enrichment is very similar to those derived from experimental data of anaerobic sulfide oxidation in the presence of Mn and Fe oxides. Sea level at the Kelly's Cove watershed was approximately 80??m above present sea level about 13 000??years before present, imposing reducing conditions on that area of the watershed. Sea level dropped approximately 60??m below present sea level about 11 000??years before present, allowing for possible oxidation of sulfide minerals and precipitation of arsenic in ferric oxyhydroxides during aeration of the ground-water system. Under present redox conditions, there is evidence that bacteria reduction of ferric oxyhydroxides releases arsenic. The fractionation of 18O in the SO4 during anaerobic oxidation of sulfide in the presence of Mn and Fe oxides and subsequent release of arsenic during Mn and Fe oxide reduction may explain the relationship between high arsenic concentrations and elevated 18O[SO4] at Kelly's Cove. ?? 2007 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Chemical Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.chemgeo.2007.04.003","issn":"00092541","usgsCitation":"Lipfert, G., Sidle, W., Reeve, A., Ayuso, R., and Boyce, A., 2007, High arsenic concentrations and enriched sulfur and oxygen isotopes in a fractured-bedrock ground-water system: Chemical Geology, v. 242, no. 3-4, p. 385-399, https://doi.org/10.1016/j.chemgeo.2007.04.003.","startPage":"385","endPage":"399","numberOfPages":"15","costCenters":[],"links":[{"id":211686,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.chemgeo.2007.04.003"},{"id":239026,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"242","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a30aee4b0c8380cd5d859","contributors":{"authors":[{"text":"Lipfert, G.","contributorId":53135,"corporation":false,"usgs":true,"family":"Lipfert","given":"G.","email":"","affiliations":[],"preferred":false,"id":428663,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sidle, W.C.","contributorId":93911,"corporation":false,"usgs":true,"family":"Sidle","given":"W.C.","email":"","affiliations":[],"preferred":false,"id":428665,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Reeve, A.S.","contributorId":64446,"corporation":false,"usgs":true,"family":"Reeve","given":"A.S.","email":"","affiliations":[],"preferred":false,"id":428664,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ayuso, R. A. 0000-0002-8496-9534","orcid":"https://orcid.org/0000-0002-8496-9534","contributorId":27079,"corporation":false,"usgs":true,"family":"Ayuso","given":"R. A.","affiliations":[],"preferred":false,"id":428662,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Boyce, A.J.","contributorId":26198,"corporation":false,"usgs":true,"family":"Boyce","given":"A.J.","email":"","affiliations":[],"preferred":false,"id":428661,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70030784,"text":"70030784 - 2007 - Dams, floodplain land use, and riparian forest conservation in the semiarid Upper Colorado River Basin, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:03","indexId":"70030784","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":"Dams, floodplain land use, and riparian forest conservation in the semiarid Upper Colorado River Basin, USA","docAbstract":"Land and water resource development can independently eliminate riparian plant communities, including Fremont cottonwood forest (CF), a major contributor to ecosystem structure and functioning in semiarid portions of the American Southwest. We tested whether floodplain development was linked to river regulation in the Upper Colorado River Basin (UCRB) by relating the extent of five developed land-cover categories as well as CF and other natural vegetation to catchment reservoir capacity, changes in total annual and annual peak discharge, and overall level of mainstem hydrologic alteration (small, moderate, or large) in 26 fourth-order subbasins. We also asked whether CF appeared to be in jeopardy at a regional level. We classified 51% of the 57,000 ha of alluvial floodplain examined along >2600 km of mainstem rivers as CF and 36% as developed. The proportion developed was unrelated to the level of mainstem hydrologic alteration. The proportion classified as CF was also independent of the level of hydrologic alteration, a result we attribute to confounding effects from development, the presence of time lags, and contrasting effects from flow alteration in different subbasins. Most CF (68% by area) had a sparse canopy (???5% cover), and stands with >50% canopy cover occupied <1% of the floodplain in 15 subbasins. We suggest that CF extent in the UCRB will decline markedly in the future, when the old trees on floodplains now disconnected from the river die and large areas change from CF to non-CF categories. Attention at a basinwide scale to the multiple factors affecting cottonwood patch dynamics is needed to assure conservation of these riparian forests. ?? 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/s00267-006-0294-7","issn":"0364152X","usgsCitation":"Andersen, D., Cooper, D., and Northcott, K., 2007, Dams, floodplain land use, and riparian forest conservation in the semiarid Upper Colorado River Basin, USA: Environmental Management, v. 40, no. 3, p. 453-475, https://doi.org/10.1007/s00267-006-0294-7.","startPage":"453","endPage":"475","numberOfPages":"23","costCenters":[],"links":[{"id":211685,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s00267-006-0294-7"},{"id":239025,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"40","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-06-06","publicationStatus":"PW","scienceBaseUri":"5059fd61e4b0c8380cd4e7e5","contributors":{"authors":[{"text":"Andersen, D.C.","contributorId":19119,"corporation":false,"usgs":true,"family":"Andersen","given":"D.C.","email":"","affiliations":[],"preferred":false,"id":428658,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cooper, D.J.","contributorId":89489,"corporation":false,"usgs":true,"family":"Cooper","given":"D.J.","email":"","affiliations":[],"preferred":false,"id":428659,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Northcott, K.","contributorId":89717,"corporation":false,"usgs":true,"family":"Northcott","given":"K.","email":"","affiliations":[],"preferred":false,"id":428660,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030783,"text":"70030783 - 2007 - Testing alternative ground water models using cross-validation and other methods","interactions":[],"lastModifiedDate":"2012-03-12T17:21:03","indexId":"70030783","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"Testing alternative ground water models using cross-validation and other methods","docAbstract":"Many methods can be used to test alternative ground water models. Of concern in this work are methods able to (1) rank alternative models (also called model discrimination) and (2) identify observations important to parameter estimates and predictions (equivalent to the purpose served by some types of sensitivity analysis). Some of the measures investigated are computationally efficient; others are computationally demanding. The latter are generally needed to account for model nonlinearity. The efficient model discrimination methods investigated include the information criteria: the corrected Akaike information criterion, Bayesian information criterion, and generalized cross-validation. The efficient sensitivity analysis measures used are dimensionless scaled sensitivity (DSS), composite scaled sensitivity, and parameter correlation coefficient (PCC); the other statistics are DFBETAS, Cook's D, and observation-prediction statistic. Acronyms are explained in the introduction. Cross-validation (CV) is a computationally intensive nonlinear method that is used for both model discrimination and sensitivity analysis. The methods are tested using up to five alternative parsimoniously constructed models of the ground water system of the Maggia Valley in southern Switzerland. The alternative models differ in their representation of hydraulic conductivity. A new method for graphically representing CV and sensitivity analysis results for complex models is presented and used to evaluate the utility of the efficient statistics. The results indicate that for model selection, the information criteria produce similar results at much smaller computational cost than CV. For identifying important observations, the only obviously inferior linear measure is DSS; the poor performance was expected because DSS does not include the effects of parameter correlation and PCC reveals large parameter correlations. ?? 2007 National Ground Water Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1745-6584.2007.00341.x","issn":"0017467X","usgsCitation":"Foglia, L., Mehl, S., Hill, M.C., Perona, P., and Burlando, P., 2007, Testing alternative ground water models using cross-validation and other methods: Ground Water, v. 45, no. 5, p. 627-641, https://doi.org/10.1111/j.1745-6584.2007.00341.x.","startPage":"627","endPage":"641","numberOfPages":"15","costCenters":[],"links":[{"id":486832,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://infoscience.epfl.ch/record/149750","text":"External Repository"},{"id":211660,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6584.2007.00341.x"},{"id":238992,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"5","noUsgsAuthors":false,"publicationDate":"2007-06-26","publicationStatus":"PW","scienceBaseUri":"505ba5bae4b08c986b320c2a","contributors":{"authors":[{"text":"Foglia, L.","contributorId":6251,"corporation":false,"usgs":true,"family":"Foglia","given":"L.","affiliations":[],"preferred":false,"id":428653,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mehl, S.W.","contributorId":84555,"corporation":false,"usgs":true,"family":"Mehl","given":"S.W.","affiliations":[],"preferred":false,"id":428657,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hill, M. C.","contributorId":48993,"corporation":false,"usgs":true,"family":"Hill","given":"M.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":428655,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Perona, P.","contributorId":55206,"corporation":false,"usgs":true,"family":"Perona","given":"P.","email":"","affiliations":[],"preferred":false,"id":428656,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Burlando, P.","contributorId":29209,"corporation":false,"usgs":true,"family":"Burlando","given":"P.","affiliations":[],"preferred":false,"id":428654,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70030763,"text":"70030763 - 2007 - Modeling the movement of a pH perturbation and its impact on adsorbed zinc and phosphate in a wastewater‐contaminated aquifer","interactions":[],"lastModifiedDate":"2023-08-02T11:07:21.55908","indexId":"70030763","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Modeling the movement of a pH perturbation and its impact on adsorbed zinc and phosphate in a wastewater‐contaminated aquifer","docAbstract":"<div class=\" metis-abstract\"><div class=\"article-section__content en main\"><p><span class=\"paraNumber\">[1]<span>&nbsp;</span></span>Chemical conditions were perturbed in an aquifer with an ambient pH of 5.9 and wastewater-derived adsorbed zinc (Zn) and phosphate (P) contamination by injecting a pulse of amended groundwater. The injected groundwater had low concentrations of dissolved Zn and P, a pH value of 4.5 resulting from equilibration with carbon dioxide gas, and added potassium bromide (KBr). Downgradient of the injection, breakthrough of nonreactive Br and total dissolved carbonate concentrations in excess of ambient values (excess TCO<sub>2</sub>) were accompanied by a decrease in pH values and over twentyfold increases in dissolved Zn concentrations above preinjection values. Peak concentrations of Br and excess TCO<sub>2</sub><span>&nbsp;</span>were followed by slow increases in pH values accompanied by significant increases in dissolved P above preinjection concentrations. The injected tracers mobilized a significant mass of wastewater-derived Zn. Reactive transport simulations incorporating surface complexation models for adsorption of Zn, P, hydrogen ions, and major cations onto the aquifer sediments, calibrated using laboratory experimental data, captured most of the important trends observed during the experiment. These include increases in Zn concentrations in response to the pH perturbation, perturbations in major cation concentrations, attenuation of the pH perturbation with transport distance, and increases in alkalinity with transport distance. Observed desorption of P in response to chemical perturbations was not predicted, possibly because of a disparity between the range of chemical conditions in the calibration data set and those encountered during the field experiment. Zinc and P desorbed rapidly in response to changing chemical conditions despite decades of contact with the sediments. Surface complexation models with relatively few parameters in the form of logK values and site concentrations show considerable promise for describing the influence of variable chemistry on the transport of adsorbing contaminants.</p></div></div>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2005WR004841","usgsCitation":"Kent, D.B., Wilkie, J., and Davis, J., 2007, Modeling the movement of a pH perturbation and its impact on adsorbed zinc and phosphate in a wastewater‐contaminated aquifer: Water Resources Research, v. 43, no. 7, W07440; 17 p., https://doi.org/10.1029/2005WR004841.","productDescription":"W07440; 17 p.","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":477072,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2005wr004841","text":"Publisher Index Page"},{"id":238662,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"43","issue":"7","noUsgsAuthors":false,"publicationDate":"2007-07-24","publicationStatus":"PW","scienceBaseUri":"505a5c4ae4b0c8380cd6fb89","contributors":{"authors":[{"text":"Kent, Douglas B. 0000-0003-3758-8322 dbkent@usgs.gov","orcid":"https://orcid.org/0000-0003-3758-8322","contributorId":1871,"corporation":false,"usgs":true,"family":"Kent","given":"Douglas","email":"dbkent@usgs.gov","middleInitial":"B.","affiliations":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true}],"preferred":true,"id":428555,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wilkie, J.A.","contributorId":82880,"corporation":false,"usgs":true,"family":"Wilkie","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":428557,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Davis, J.A.","contributorId":71694,"corporation":false,"usgs":true,"family":"Davis","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":428556,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030762,"text":"70030762 - 2007 - Atmospheric bromine flux from the coastal Abu Dhabi sabkhat: A ground-water mass-balance investigation","interactions":[],"lastModifiedDate":"2012-03-12T17:21:19","indexId":"70030762","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":"Atmospheric bromine flux from the coastal Abu Dhabi sabkhat: A ground-water mass-balance investigation","docAbstract":"A solute mass-balance study of ground water of the 3000 km2 coastal sabkhat (salt flats) of the Emirate of Abu Dhabi, United Arab Emirates, documents an annual bromide loss of approximately 255 metric tons (0.0032 Gmoles), or 85 kg/km2. This value is an order of magnitude greater than previously published direct measurements from the atmosphere over an evaporative environment of a salar in Bolivia. Laboratory evidence, consistent with published reports, suggests that this loss is by vapor transport to the atmosphere. If this bromine flux to the atmosphere is representative of the total earth area of active salt flats then it is a significant, and generally under recognized, input to the global atmospheric bromide flux.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geophysical Research Letters","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2007GL029922","issn":"00948276","usgsCitation":"Wood, W., and Sanford, W., 2007, Atmospheric bromine flux from the coastal Abu Dhabi sabkhat: A ground-water mass-balance investigation: Geophysical Research Letters, v. 34, no. 14, https://doi.org/10.1029/2007GL029922.","costCenters":[],"links":[{"id":476991,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2007gl029922","text":"Publisher Index Page"},{"id":211381,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2007GL029922"},{"id":238661,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"34","issue":"14","noUsgsAuthors":false,"publicationDate":"2007-07-31","publicationStatus":"PW","scienceBaseUri":"5059eebee4b0c8380cd49f01","contributors":{"authors":[{"text":"Wood, W.W.","contributorId":21974,"corporation":false,"usgs":true,"family":"Wood","given":"W.W.","email":"","affiliations":[],"preferred":false,"id":428553,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sanford, W. E. 0000-0002-6624-0280","orcid":"https://orcid.org/0000-0002-6624-0280","contributorId":102112,"corporation":false,"usgs":true,"family":"Sanford","given":"W. E.","affiliations":[],"preferred":false,"id":428554,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70030758,"text":"70030758 - 2007 - Nitrous oxide fluxes from cultivated areas and rangeland: U.S. High Plains","interactions":[],"lastModifiedDate":"2017-01-18T15:01:03","indexId":"70030758","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3674,"text":"Vadose Zone Journal","active":true,"publicationSubtype":{"id":10}},"title":"Nitrous oxide fluxes from cultivated areas and rangeland: U.S. High Plains","docAbstract":"Concentration profiles of N2O, a greenhouse gas, and the conservative trace gases SF6 and the chlorofluorocarbons CFC-11, CFC-12, CFC-113, and were measured periodically through thick vadose zones at nine sites in the U.S. High Plains. The CFC and SF6 measurements were used to calibrate a one-dimensional gas diffusion model, using the parameter identification program UCODE. The calibrated model was used with N2O measurements to estimate average annual N2O flux from both the root zone and the deep vadose zone to the atmosphere. Estimates of root-zone N 2O fluxes from three rangeland sites ranged from near 0 to about 0.2 kg N2O-N ha-1 yr-1, values near the low end of the ranges determined for native grass from other studies. Estimates of root-zone N2O fluxes from two fields planted to corn (Zea mays L.) of about 2 to 6 kg N2O-N ha-1 yr-1 are similar to those determined for corn in other studies. Estimates of N2O flux from Conservation Reserve grassland converted from irrigated corn indicate that production of N2O is substantially reduced following conversion from cropland. Small N2O fluxes from the water table or from deep in the vadose zone occurred at three sites, ranging from 0.004 to 0.02 kg N 2O-N ha-1 yr-1. Our estimates of N2O flux represent space- and time-averaged values that should be useful to more fully evaluate the significance of instantaneous point flux measurements. ?? Soil Science Society of America.","language":"English","publisher":"ACSESS","doi":"10.2136/vzj2006.0164","issn":"15391663","usgsCitation":"Weeks, E.P., and McMahon, P.B., 2007, Nitrous oxide fluxes from cultivated areas and rangeland: U.S. High Plains: Vadose Zone Journal, v. 6, no. 3, p. 496-510, https://doi.org/10.2136/vzj2006.0164.","productDescription":"15 p.","startPage":"496","endPage":"510","numberOfPages":"15","costCenters":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true}],"links":[{"id":238590,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211321,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2136/vzj2006.0164"}],"volume":"6","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6705e4b0c8380cd73126","contributors":{"authors":[{"text":"Weeks, Edwin P. epweeks@usgs.gov","contributorId":2576,"corporation":false,"usgs":true,"family":"Weeks","given":"Edwin","email":"epweeks@usgs.gov","middleInitial":"P.","affiliations":[],"preferred":true,"id":428542,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McMahon, Peter B. 0000-0001-7452-2379 pmcmahon@usgs.gov","orcid":"https://orcid.org/0000-0001-7452-2379","contributorId":724,"corporation":false,"usgs":true,"family":"McMahon","given":"Peter","email":"pmcmahon@usgs.gov","middleInitial":"B.","affiliations":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true}],"preferred":true,"id":428541,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70030756,"text":"70030756 - 2007 - Calibration of the calcite-water oxygen-isotope geothermometer at Devils Hole, Nevada, a natural laboratory","interactions":[],"lastModifiedDate":"2012-03-12T17:21:20","indexId":"70030756","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1759,"text":"Geochimica et Cosmochimica Acta","active":true,"publicationSubtype":{"id":10}},"title":"Calibration of the calcite-water oxygen-isotope geothermometer at Devils Hole, Nevada, a natural laboratory","docAbstract":"The ??18O of ground water (-13.54 ?? 0.05 ???) and inorganically precipitated Holocene vein calcite (+14.56 ?? 0.03 ???) from Devils Hole cave #2 in southcentral Nevada yield an oxygen isotopic fractionation factor between calcite and water at 33.7 ??C of 1.02849 ?? 0.00013 (1000 ln ??calcite-water = 28.09 ?? 0.13). Using the commonly accepted value of ???(??calcite-water)/???T of -0.00020 K-1, this corresponds to a 1000 ln ??calcite-water value at 25 ??C of 29.80, which differs substantially from the current accepted value of 28.3. Use of previously published oxygen isotopic fractionation factors would yield a calcite precipitation temperature in Devils Hole that is 8 ??C lower than the measured ground water temperature. Alternatively, previously published fractionation factors would yield a ??18O of water, from which the calcite precipitated, that is too negative by 1.5 ??? using a temperature of 33.7 ??C. Several lines of evidence indicate that the geochemical environment of Devils Hole has been remarkably constant for at least 10 ka. Accordingly, a re-evaluation of calcite-water oxygen isotopic fractionation factor may be in order. Assuming the Devils Hole oxygen isotopic value of ??calcite-water represents thermodynamic equilibrium, many marine carbonates are precipitated with a ??18O value that is too low, apparently due to a kinetic isotopic fractionation that preferentially enriches 16O in the solid carbonate over 18O, feigning oxygen isotopic equilibrium.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geochimica et Cosmochimica Acta","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.gca.2007.05.028","issn":"00167037","usgsCitation":"Coplen, T., 2007, Calibration of the calcite-water oxygen-isotope geothermometer at Devils Hole, Nevada, a natural laboratory: Geochimica et Cosmochimica Acta, v. 71, no. 16, p. 3948-3957, https://doi.org/10.1016/j.gca.2007.05.028.","startPage":"3948","endPage":"3957","numberOfPages":"10","costCenters":[],"links":[{"id":211288,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.gca.2007.05.028"},{"id":238556,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"71","issue":"16","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f318e4b0c8380cd4b5d2","contributors":{"authors":[{"text":"Coplen, T.B.","contributorId":34147,"corporation":false,"usgs":true,"family":"Coplen","given":"T.B.","affiliations":[],"preferred":false,"id":428538,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70030749,"text":"70030749 - 2007 - Remote sensing of particle backscattering in Chesapeake Bay: a 6-year SeaWiFS retrospective view","interactions":[],"lastModifiedDate":"2014-10-09T11:14:03","indexId":"70030749","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":"Remote sensing of particle backscattering in Chesapeake Bay: a 6-year SeaWiFS retrospective view","docAbstract":"Traditional field techniques to monitor water quality in large estuaries, such as boat-based surveys and autonomous moored sensors, generally provide limited spatial coverage. Satellite imagery potentially can be used to address both of these limitations. Here, we show that satellite-based observations are useful for inferring total-suspended-solids (TSS) concentrations in estuarine areas. A spectra-matching optimization algorithm was used to estimate the particle backscattering coefficient at 400 nm, b<sub>bp</sub>(400), in Chesapeake Bay from Sea-viewing Wide-Field-of-view Sensor (SeaWiFS) satellite imagery. These estimated values of b<sub>bp</sub>(400) were compared to in situ measurements of TSS for the study period of September 1997–December 2003. Contemporaneous SeaWiFS b<sub>bp</sub>(400) values and TSS concentrations were positively correlated (N = 340, r<sup>2</sup> = 0.4, P < 0.0005), and the satellite-derived b<sub>bp</sub>(400) values served as a reasonable first-order approximation for synoptically mapping TSS. Overall, large-scale patterns of SeaWiFS b<sub>bp</sub>(400) appeared to be consistent with expectations based on field observations and historical reports of TSS. Monthly averages indicated that SeaWiFS b<sub>bp</sub>(400) was typically largest in winter (>0.049 m<sup>−1</sup>, November–February) and smallest in summer (<0.031 m<sup>−1</sup>, June–August), regardless of the amount of riverine discharge to the bay. The study period also included Hurricanes Floyd and Isabel, which caused large-scale turbidity events and changes in the water quality of the bay. These results demonstrate that this technique can provide frequent synoptic assessments of suspended solids concentrations in Chesapeake Bay and other coastal regions.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Estuarine, Coastal and Shelf Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.ecss.2007.03.005","issn":"02727714","usgsCitation":"Zawada, D., Hu, C., Clayton, T., Chen, Z., Brock, J.C., and Muller-Karger, F., 2007, Remote sensing of particle backscattering in Chesapeake Bay: a 6-year SeaWiFS retrospective view: Estuarine, Coastal and Shelf Science, v. 73, no. 3-4, p. 792-806, https://doi.org/10.1016/j.ecss.2007.03.005.","productDescription":"15 p.","startPage":"792","endPage":"806","numberOfPages":"15","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":211630,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.ecss.2007.03.005"},{"id":238953,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"Chesapeake Bay","volume":"73","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aa702e4b0c8380cd8518f","contributors":{"authors":[{"text":"Zawada, D.G.","contributorId":8938,"corporation":false,"usgs":true,"family":"Zawada","given":"D.G.","email":"","affiliations":[],"preferred":false,"id":428510,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hu, C.","contributorId":75748,"corporation":false,"usgs":true,"family":"Hu","given":"C.","email":"","affiliations":[],"preferred":false,"id":428513,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Clayton, T.","contributorId":83332,"corporation":false,"usgs":true,"family":"Clayton","given":"T.","email":"","affiliations":[],"preferred":false,"id":428514,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Chen, Z.","contributorId":26117,"corporation":false,"usgs":true,"family":"Chen","given":"Z.","email":"","affiliations":[],"preferred":false,"id":428511,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Brock, J. C.","contributorId":36095,"corporation":false,"usgs":true,"family":"Brock","given":"J.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":428512,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Muller-Karger, F. E.","contributorId":84542,"corporation":false,"usgs":true,"family":"Muller-Karger","given":"F. E.","affiliations":[],"preferred":false,"id":428515,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70030743,"text":"70030743 - 2007 - A simulation-based approach for estimating premining water quality: Red Mountain Creek, Colorado","interactions":[],"lastModifiedDate":"2018-10-17T11:22:55","indexId":"70030743","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":835,"text":"Applied Geochemistry","active":true,"publicationSubtype":{"id":10}},"title":"A simulation-based approach for estimating premining water quality: Red Mountain Creek, Colorado","docAbstract":"Regulatory agencies are often charged with the task of setting site-specific numeric water quality standards for impaired streams. This task is particularly difficult for streams draining highly mineralized watersheds with past mining activity. Baseline water quality data obtained prior to mining are often non-existent and application of generic water quality standards developed for unmineralized watersheds is suspect given the geology of most watersheds affected by mining. Various approaches have been used to estimate premining conditions, but none of the existing approaches rigorously consider the physical and geochemical processes that ultimately determine instream water quality. An approach based on simulation modeling is therefore proposed herein. The approach utilizes synoptic data that provide spatially-detailed profiles of concentration, streamflow, and constituent load along the study reach. This field data set is used to calibrate a reactive stream transport model that considers the suite of physical and geochemical processes that affect constituent concentrations during instream transport. A key input to the model is the quality and quantity of waters entering the study reach. This input is based on chemical analyses available from synoptic sampling and observed increases in streamflow along the study reach. Given the calibrated model, additional simulations are conducted to estimate premining conditions. In these simulations, the chemistry of mining-affected sources is replaced with the chemistry of waters that are thought to be unaffected by mining (proximal, premining analogues). The resultant simulations provide estimates of premining water quality that reflect both the reduced loads that were present prior to mining and the processes that affect these loads as they are transported downstream. This simulation-based approach is demonstrated using data from Red Mountain Creek, Colorado, a small stream draining a heavily-mined watershed. Model application to the premining problem for Red Mountain Creek is based on limited field reconnaissance and chemical analyses; additional field work and analyses may be needed to develop definitive, quantitative estimates of premining water quality.","language":"English","publisher":"Elsevier","doi":"10.1016/j.apgeochem.2007.03.054","issn":"08832927","usgsCitation":"Runkel, R.L., Kimball, B.A., Walton-Day, K., and Verplanck, P.L., 2007, A simulation-based approach for estimating premining water quality: Red Mountain Creek, Colorado: Applied Geochemistry, v. 22, no. 9, p. 1899-1918, https://doi.org/10.1016/j.apgeochem.2007.03.054.","productDescription":"20 p.","startPage":"1899","endPage":"1918","numberOfPages":"20","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":238855,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211552,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.apgeochem.2007.03.054"}],"country":"United States","state":"Colorado","otherGeospatial":"Red Mountain Creek","volume":"22","issue":"9","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e598e4b0c8380cd46e66","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":428487,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kimball, Briant A","contributorId":118888,"corporation":false,"usgs":true,"family":"Kimball","given":"Briant","email":"","middleInitial":"A","affiliations":[],"preferred":false,"id":428486,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Walton-Day, Katherine 0000-0002-9146-6193 kwaltond@usgs.gov","orcid":"https://orcid.org/0000-0002-9146-6193","contributorId":1245,"corporation":false,"usgs":true,"family":"Walton-Day","given":"Katherine","email":"kwaltond@usgs.gov","affiliations":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true}],"preferred":false,"id":428485,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Verplanck, Philip L. 0000-0002-3653-6419 plv@usgs.gov","orcid":"https://orcid.org/0000-0002-3653-6419","contributorId":728,"corporation":false,"usgs":true,"family":"Verplanck","given":"Philip","email":"plv@usgs.gov","middleInitial":"L.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":428488,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70030733,"text":"70030733 - 2007 - Controls on the variability of net infiltration to desert sandstone","interactions":[],"lastModifiedDate":"2018-04-03T17:13:30","indexId":"70030733","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Controls on the variability of net infiltration to desert sandstone","docAbstract":"<p><span>As populations grow in arid climates and desert bedrock aquifers are increasingly targeted for future development, understanding and quantifying the spatial variability of net infiltration becomes critically important for accurately inventorying water resources and mapping contamination vulnerability. This paper presents a conceptual model of net infiltration to desert sandstone and then develops an empirical equation for its spatial quantification at the watershed scale using linear least squares inversion methods for evaluating controlling parameters (independent variables) based on estimated net infiltration rates (dependent variables). Net infiltration rates used for this regression analysis were calculated from environmental tracers in boreholes and more than 3000 linear meters of vadose zone excavations in an upland basin in southwestern Utah underlain by Navajo sandstone. Soil coarseness, distance to upgradient outcrop, and topographic slope were shown to be the primary physical parameters controlling the spatial variability of net infiltration. Although the method should be transferable to other desert sandstone settings for determining the relative spatial distribution of net infiltration, further study is needed to evaluate the effects of other potential parameters such as slope aspect, outcrop parameters, and climate on absolute net infiltration rates.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2006WR005113","usgsCitation":"Heilweil, V.M., McKinney, T., Zhdanov, M.S., and Watt, D.E., 2007, Controls on the variability of net infiltration to desert sandstone: Water Resources Research, v. 43, no. 7, Article W07431; 15 p., https://doi.org/10.1029/2006WR005113.","productDescription":"Article W07431; 15 p.","costCenters":[],"links":[{"id":477213,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006wr005113","text":"Publisher Index Page"},{"id":239221,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"43","issue":"7","noUsgsAuthors":false,"publicationDate":"2007-07-18","publicationStatus":"PW","scienceBaseUri":"5059fbd5e4b0c8380cd4dfc5","contributors":{"authors":[{"text":"Heilweil, Victor M. heilweil@usgs.gov","contributorId":837,"corporation":false,"usgs":true,"family":"Heilweil","given":"Victor","email":"heilweil@usgs.gov","middleInitial":"M.","affiliations":[{"id":610,"text":"Utah Water Science Center","active":true,"usgs":true}],"preferred":true,"id":428443,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McKinney, Tim S.","contributorId":66792,"corporation":false,"usgs":true,"family":"McKinney","given":"Tim S.","affiliations":[],"preferred":false,"id":428445,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zhdanov, Michael S.","contributorId":37955,"corporation":false,"usgs":false,"family":"Zhdanov","given":"Michael","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":428444,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Watt, Dennis E.","contributorId":55286,"corporation":false,"usgs":true,"family":"Watt","given":"Dennis","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":428442,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70030731,"text":"70030731 - 2007 - Detection of viral hemorrhagic septicemia in round gobies in New York State (USA) waters of Lake Ontario and the St. Lawrence River","interactions":[],"lastModifiedDate":"2021-05-21T17:56:45.110211","indexId":"70030731","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1396,"text":"Diseases of Aquatic Organisms","active":true,"publicationSubtype":{"id":10}},"title":"Detection of viral hemorrhagic septicemia in round gobies in New York State (USA) waters of Lake Ontario and the St. Lawrence River","docAbstract":"<p>In May 2006 a large mortality of several thousand round gobies <i>Neogobius melanostomus</i> (Pallas, 1814) occurred in New York waters of the St. Lawrence River and Lake Ontario. Necropsies of sampled fish from these areas showed pallor of the liver and gills, and hemorrhagic areas in many organs. Histopathologic examination of affected tissues revealed areas of necrosis and hemorrhage. Inoculations of fathead minnow <i>Pimephales promelas</i> (Rafinesque, 1820) cell cultures with dilutions of tissue samples from the necropsied gobies produced a cytopathic effect within 5 d post-inoculation. Samples of cell culture supernatant were tested using RT-PCR and confirmed the presence of viral hemorrhagic septicemia virus (VHSV). Sequence analysis of the VHSV isolate resulted in its assignment to the type-IVb subgroup. The detection of VHSV in a relatively recent invasive fish species in the Great Lakes and the potential impact of VHSV on the ecology and economy of the area will require further investigation and careful management considerations. Inter-Research 2007.</p>","language":"English","publisher":"Inter-Research","doi":"10.3354/dao076187","usgsCitation":"Groocock, G., Getchell, R., Wooster, G., Britt, K., Batts, W., Winton, J., Casey, R., Casey, J., and Bowser, P., 2007, Detection of viral hemorrhagic septicemia in round gobies in New York State (USA) waters of Lake Ontario and the St. Lawrence River: Diseases of Aquatic Organisms, v. 76, no. 3, p. 187-192, https://doi.org/10.3354/dao076187.","productDescription":"6 p.","startPage":"187","endPage":"192","costCenters":[{"id":654,"text":"Western Fisheries Research Center","active":true,"usgs":true}],"links":[{"id":477212,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.3354/dao076187","text":"Publisher Index Page"},{"id":239187,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"New York","otherGeospatial":"Lake Ontario, St. Lawrence River","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -80.540771484375,\n              43.141078106345866\n            ],\n            [\n              -75.16845703124999,\n              43.141078106345866\n            ],\n            [\n              -75.16845703124999,\n              44.07969327425713\n            ],\n            [\n              -80.540771484375,\n              44.07969327425713\n            ],\n            [\n              -80.540771484375,\n              43.141078106345866\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"76","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ff7ae4b0c8380cd4f1f9","contributors":{"authors":[{"text":"Groocock, G.H.","contributorId":33124,"corporation":false,"usgs":true,"family":"Groocock","given":"G.H.","affiliations":[],"preferred":false,"id":428430,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Getchell, R.G.","contributorId":98944,"corporation":false,"usgs":true,"family":"Getchell","given":"R.G.","affiliations":[],"preferred":false,"id":428435,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wooster, G.A.","contributorId":31975,"corporation":false,"usgs":true,"family":"Wooster","given":"G.A.","email":"","affiliations":[],"preferred":false,"id":428429,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Britt, K.L.","contributorId":92490,"corporation":false,"usgs":true,"family":"Britt","given":"K.L.","email":"","affiliations":[],"preferred":false,"id":428434,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Batts, W.N. 0000-0002-6469-9004","orcid":"https://orcid.org/0000-0002-6469-9004","contributorId":51043,"corporation":false,"usgs":true,"family":"Batts","given":"W.N.","affiliations":[],"preferred":false,"id":428431,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Winton, J. R. 0000-0002-3505-5509","orcid":"https://orcid.org/0000-0002-3505-5509","contributorId":82441,"corporation":false,"usgs":true,"family":"Winton","given":"J. R.","affiliations":[],"preferred":false,"id":428433,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Casey, R.N.","contributorId":66629,"corporation":false,"usgs":true,"family":"Casey","given":"R.N.","email":"","affiliations":[],"preferred":false,"id":428432,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Casey, J.W.","contributorId":11987,"corporation":false,"usgs":true,"family":"Casey","given":"J.W.","email":"","affiliations":[],"preferred":false,"id":428427,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Bowser, P.R.","contributorId":17935,"corporation":false,"usgs":true,"family":"Bowser","given":"P.R.","email":"","affiliations":[],"preferred":false,"id":428428,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}}
,{"id":70030728,"text":"70030728 - 2007 - Population structure of <i>Cladophora</i>-borne <i>Escherichia coli</i> in nearshore water of Lake Michigan","interactions":[],"lastModifiedDate":"2016-04-29T09:46:28","indexId":"70030728","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3716,"text":"Water Research","onlineIssn":"1879-2448","printIssn":"0043-1354","active":true,"publicationSubtype":{"id":10}},"title":"Population structure of <i>Cladophora</i>-borne <i>Escherichia coli</i> in nearshore water of Lake Michigan","docAbstract":"<p><span>We previously reported that the macrophytic green alga&nbsp;</span><i>Cladophora</i><span>&nbsp;harbors high densities (up to 10</span><sup>6</sup><span>&nbsp;colony-forming units/g dry weight) of the fecal indicator bacteria,</span><i>Escherichia coli</i><span>&nbsp;and enterococci, in shoreline waters of Lake Michigan. However, the population structure and genetic relatedness of&nbsp;</span><i>Cladophora</i><span>-borne indicator bacteria remain poorly understood. In this study, 835&nbsp;</span><i>E. coli</i><span>&nbsp;isolates were collected from</span><i>Cladophora</i><span>&nbsp;tufts (mats) growing on rocks from a breakwater located within the Indiana Dunes National Lakeshore in northwest Indiana. The horizontal fluorophore enhanced rep-PCR (HFERP) DNA fingerprinting technique was used to determine the genetic relatedness of the isolates to each other and to those in a library of&nbsp;</span><i>E. coli</i><span>&nbsp;DNA fingerprints. While the&nbsp;</span><i>E. coli</i><span>&nbsp;isolates from&nbsp;</span><i>Cladophora</i><span>&nbsp;showed a high degree of genetic relatedness (⩾92% similarity), in most cases, however, the isolates were genetically distinct. The Shannon diversity index for the population was very high (5.39). Both spatial and temporal influences contributed to the genetic diversity. There was a strong association of isolate genotypes by location (79% and 80% for lake- and ditch-side samplings, respectively), and isolates collected from 2002 were distinctly different from those obtained in 2003.&nbsp;</span><i>Cladophora</i><span>-borne&nbsp;</span><i>E. coli</i><span>&nbsp;isolates represented a unique group, which was distinct from other&nbsp;</span><i>E. coli</i><span>&nbsp;isolates in the DNA fingerprint library tested. Taken together, these results indicate that&nbsp;</span><i>E. coli</i><span>&nbsp;strains associated with&nbsp;</span><i>Cladophora</i><span>&nbsp;may be a recurring source of indicator bacteria to the nearshore beach.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.watres.2007.03.009","issn":"00431354","usgsCitation":"Byappanahalli, M., Whitman, R., Shively, D., Ferguson, J., Ishii, S., and Sadowsky, M., 2007, Population structure of <i>Cladophora</i>-borne <i>Escherichia coli</i> in nearshore water of Lake Michigan: Water Research, v. 41, no. 16, p. 3649-3654, https://doi.org/10.1016/j.watres.2007.03.009.","productDescription":"6 p.","startPage":"3649","endPage":"3654","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":211797,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.watres.2007.03.009"},{"id":239153,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"41","issue":"16","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7d9ce4b0c8380cd7a062","contributors":{"authors":[{"text":"Byappanahalli, M.N.","contributorId":11384,"corporation":false,"usgs":true,"family":"Byappanahalli","given":"M.N.","email":"","affiliations":[],"preferred":false,"id":428410,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Whitman, R.L.","contributorId":69750,"corporation":false,"usgs":true,"family":"Whitman","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":428414,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Shively, D.A.","contributorId":78123,"corporation":false,"usgs":true,"family":"Shively","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":428415,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ferguson, J.","contributorId":31907,"corporation":false,"usgs":true,"family":"Ferguson","given":"J.","email":"","affiliations":[],"preferred":false,"id":428412,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ishii, S.","contributorId":59613,"corporation":false,"usgs":true,"family":"Ishii","given":"S.","email":"","affiliations":[],"preferred":false,"id":428413,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Sadowsky, M.J.","contributorId":19337,"corporation":false,"usgs":true,"family":"Sadowsky","given":"M.J.","email":"","affiliations":[],"preferred":false,"id":428411,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70030727,"text":"70030727 - 2007 - GIS methodology for quantifying channel change in Las Vegas, Nevada","interactions":[],"lastModifiedDate":"2012-03-12T17:21:01","indexId":"70030727","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2529,"text":"Journal of the American Water Resources Association","active":true,"publicationSubtype":{"id":10}},"title":"GIS methodology for quantifying channel change in Las Vegas, Nevada","docAbstract":"This study applies spatial analyses to examine the consequences of accelerated urban expansion on a hydrologic system over a period of 24 years. Three sets of historical aerial photos are used in a GIS analysis to document the geomorphic history of Las Vegas Wash, which drains the rapidly growing Las Vegas urban area in southern Nevada. New spatial techniques are introduced to make quantitative measurements of the erosion at three specific time intervals in the hydrologic evolution of the channel and floodplain. Unlike other erosion studies that use two different elevation surfaces to assess erosion, this study used a single elevation surface to remove systematic and nonsystemic elevation errors. The spatial analysis quantifies channel changes for discrete time periods, calculates erosion volumes, and provides a foundation to examine how the specific mechanisms related to urban expansion have affected Las Vegas Wash. The erosion calculated over 24 years is the largest documented sediment loss attributed to the effect of rapid urban growth. ?? 2007 American Water Resources Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of the American Water Resources Association","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1752-1688.2007.00073.x","issn":"1093474X","usgsCitation":"Buckingham, S., and Whitney, J., 2007, GIS methodology for quantifying channel change in Las Vegas, Nevada: Journal of the American Water Resources Association, v. 43, no. 4, p. 888-898, https://doi.org/10.1111/j.1752-1688.2007.00073.x.","startPage":"888","endPage":"898","numberOfPages":"11","costCenters":[],"links":[{"id":211767,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1752-1688.2007.00073.x"},{"id":239119,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"43","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-06-28","publicationStatus":"PW","scienceBaseUri":"505a146ae4b0c8380cd54a15","contributors":{"authors":[{"text":"Buckingham, S.E.","contributorId":9454,"corporation":false,"usgs":true,"family":"Buckingham","given":"S.E.","email":"","affiliations":[],"preferred":false,"id":428408,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Whitney, J.W.","contributorId":27437,"corporation":false,"usgs":true,"family":"Whitney","given":"J.W.","email":"","affiliations":[],"preferred":false,"id":428409,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70030725,"text":"70030725 - 2007 - Temporal trends in concentrations of DBCP and nitrate in groundwater in the eastern San Joaquin Valley, California, USA","interactions":[],"lastModifiedDate":"2018-09-13T14:28:19","indexId":"70030725","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1923,"text":"Hydrogeology Journal","active":true,"publicationSubtype":{"id":10}},"title":"Temporal trends in concentrations of DBCP and nitrate in groundwater in the eastern San Joaquin Valley, California, USA","docAbstract":"Temporal monitoring of the pesticide 1,2-dibromo-3-chloropropane (DBCP) and nitrate and indicators of mean groundwater age were used to evaluate the transport and fate of agricultural chemicals in groundwater and to predict the long-term effects in the regional aquifer system in the eastern San Joaquin Valley, California. Twenty monitoring wells were installed on a transect along an approximate groundwater flow path. Concentrations of DBCP and nitrate in the wells were compared to concentrations in regional areal monitoring networks. DBCP persists at concentrations above the US Environmental Protection Agency's maximum contaminant level (MCL) at depths of nearly 40 m below the water table, more than 25 years after it was banned. Nitrate concentrations above the MCL reached depths of more than 20 m below the water table. Because of the intensive pumping and irrigation recharge, vertical flow paths are dominant. High concentrations (above MCLs) in the shallow part of the regional aquifer system will likely move deeper in the system, affecting both domestic and public-supply wells. The large fraction of old water (unaffected by agricultural chemicals) in deep monitoring wells suggests that it could take decades for concentrations to reach MCLs in deep, long-screened public-supply wells, however. ?? Springer-Verlag 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrogeology Journal","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10040-006-0148-7","issn":"14312174","usgsCitation":"Burow, K., Dubrovsky, N., and Shelton, J.L., 2007, Temporal trends in concentrations of DBCP and nitrate in groundwater in the eastern San Joaquin Valley, California, USA: Hydrogeology Journal, v. 15, no. 5, p. 991-1007, https://doi.org/10.1007/s10040-006-0148-7.","startPage":"991","endPage":"1007","numberOfPages":"17","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":239117,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211765,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10040-006-0148-7"}],"volume":"15","issue":"5","noUsgsAuthors":false,"publicationDate":"2007-01-16","publicationStatus":"PW","scienceBaseUri":"505ba51ce4b08c986b320800","contributors":{"authors":[{"text":"Burow, K.R. 0000-0001-6006-6667","orcid":"https://orcid.org/0000-0001-6006-6667","contributorId":48283,"corporation":false,"usgs":true,"family":"Burow","given":"K.R.","affiliations":[],"preferred":false,"id":428403,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dubrovsky, N. M.","contributorId":48199,"corporation":false,"usgs":true,"family":"Dubrovsky","given":"N. M.","affiliations":[],"preferred":false,"id":428402,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Shelton, James L.","contributorId":85319,"corporation":false,"usgs":false,"family":"Shelton","given":"James","email":"","middleInitial":"L.","affiliations":[{"id":13267,"text":"Warnell School of Forestry and Natural Resources, University of Georgia","active":true,"usgs":false}],"preferred":false,"id":428404,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030719,"text":"70030719 - 2007 - Passive aerobic treatment of net-alkaline, iron-laden drainage from a flooded underground anthracite mine, Pennsylvania, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:10","indexId":"70030719","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2745,"text":"Mine Water and the Environment","active":true,"publicationSubtype":{"id":10}},"title":"Passive aerobic treatment of net-alkaline, iron-laden drainage from a flooded underground anthracite mine, Pennsylvania, USA","docAbstract":"This report evaluates the results of a continuous 4.5-day laboratory aeration experiment and the first year of passive, aerobic treatment of abandoned mine drainage (AMD) from a typical flooded underground anthracite mine in eastern Pennsylvania, USA. During 1991-2006, the AMD source, locally known as the Otto Discharge, had flows from 20 to 270 L/s (median 92 L/s) and water quality that was consistently suboxic (median 0.9 mg/L O2) and circumneutral (pH ??? 6.0; net alkalinity >10) with moderate concentrations of dissolved iron and manganese and low concentrations of dissolved aluminum (medians of 11, 2.2, and <0.2 mg/L, respectively). In 2001, the laboratory aeration experiment demonstrated rapid oxidation of ferrous iron (Fe 2+) without supplemental alkalinity; the initial Fe2+ concentration of 16.4 mg/L decreased to less than 0.5 mg/L within 24 h; pH values increased rapidly from 5.8 to 7.2, ultimately attaining a steady-state value of 7.5. The increased pH coincided with a rapid decrease in the partial pressure of carbon dioxide (PCO2) from an initial value of 10 -1.1atm to a steady-state value of 10-3.1atm. From these results, a staged aerobic treatment system was conceptualized consisting of a 2 m deep pond with innovative aeration and recirculation to promote rapid oxidation of Fe2+, two 0.3 m deep wetlands to facilitate iron solids removal, and a supplemental oxic limestone drain for dissolved manganese and trace-metal removal. The system was constructed, but without the aeration mechanism, and began operation in June 2005. During the first 12 months of operation, estimated detention times in the treatment system ranged from 9 to 38 h. However, in contrast with 80-100% removal of Fe2+ over similar elapsed times during the laboratory aeration experiment, the treatment system typically removed less than 35% of the influent Fe2+. Although concentrations of dissolved CO2 decreased progressively within the treatment system, the PCO2 values for treated effluent remained elevated (10-2.4 to 10-1.7atm). The elevated PCO 2 maintained the pH within the system at values less than 7 and hence slowed the rate of Fe2+ oxidation compared to the aeration experiment. Kinetic models of Fe2+ oxidation that consider effects of pH and dissolved O2 were incorporated in the geochemical computer program PHREEQC to evaluate the effects of detention time, pH, and other variables on Fe2+ oxidation and removal rates. These models and the laboratory aeration experiment indicate that performance of this and other aerobic wetlands for treatment of net-alkaline AMD could be improved by aggressive, continuous aeration in the initial stage to decrease PCO 2, increase pH, and accelerate Fe2+ oxidation. ?? 2007 Springer-Verlag.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Mine Water and the Environment","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10230-007-0002-8","issn":"10259112","usgsCitation":"Cravotta, C., 2007, Passive aerobic treatment of net-alkaline, iron-laden drainage from a flooded underground anthracite mine, Pennsylvania, USA: Mine Water and the Environment, v. 26, no. 3, p. 128-149, https://doi.org/10.1007/s10230-007-0002-8.","startPage":"128","endPage":"149","numberOfPages":"22","costCenters":[],"links":[{"id":212138,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10230-007-0002-8"},{"id":239574,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"26","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-08-18","publicationStatus":"PW","scienceBaseUri":"505a7576e4b0c8380cd77b70","contributors":{"authors":[{"text":"Cravotta, C.A. III","contributorId":18405,"corporation":false,"usgs":true,"family":"Cravotta","given":"C.A.","suffix":"III","email":"","affiliations":[],"preferred":false,"id":428378,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70030617,"text":"70030617 - 2007 - Numerical modelling to determine freshwater/saltwater interface configuration in a low-gradient coastal wetland aquifer","interactions":[],"lastModifiedDate":"2012-03-12T17:21:13","indexId":"70030617","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Numerical modelling to determine freshwater/saltwater interface configuration in a low-gradient coastal wetland aquifer","docAbstract":"A coupled hydrodynamic surface-water/groundwater model with salinity transport is used to examine the aquifer salinity interface in the coastal wetlands of Everglades National Park in Florida, USA. The hydrology differs from many other coastal areas in that inland water levels are often higher than land surface, the flow gradients are small, and, along parts of the coastline, the wetland is separated from the offshore waters by a natural embankment. Examining the model-simulated aquifer salinities along a transect that cuts the coastal embankment, a small zone of fresh groundwater is seen beneath the embankment, which varies seasonally in size and salinity. The simulated surface-water and groundwater levels suggest that this zone exists because of ponding of surface water at the coastal embankment, creating freshwater underflow to the offshore waters. The seasonal variability in the freshwater zone indicates that it is sensitive to the wetland flows and water levels. The small size of the zone in the simulation indicates that a model with a higher spatial resolution could probably depict the zone more accurately. The coastal ecology is strongly affected by the salinity of the shallow groundwater and the coastal freshwater zone is sensitive to wetland flows and levels. In this environment, predicting the aquifer salinity interface in coastal wetlands is important in examining the effects of changing water deliveries associated with ecosystem restoration efforts.","largerWorkTitle":"IAHS-AISH Publication","conferenceTitle":"International Symposium: A New Focus on Groundwater - Seawater Interactions - 24th General Assembly of the In","conferenceDate":"2 July 2007 through 13 July 2007","conferenceLocation":"Perugia","language":"English","issn":"01447","isbn":"9781901502046","usgsCitation":"Swain, E., and Wolfert, M., 2007, Numerical modelling to determine freshwater/saltwater interface configuration in a low-gradient coastal wetland aquifer, <i>in</i> IAHS-AISH Publication, no. 312, Perugia, 2 July 2007 through 13 July 2007, p. 264-271.","startPage":"264","endPage":"271","numberOfPages":"8","costCenters":[],"links":[{"id":239598,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"312","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6901e4b0c8380cd73af7","contributors":{"authors":[{"text":"Swain, E. 0000-0001-7168-708X","orcid":"https://orcid.org/0000-0001-7168-708X","contributorId":82122,"corporation":false,"usgs":true,"family":"Swain","given":"E.","affiliations":[],"preferred":false,"id":427883,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wolfert, M.","contributorId":96474,"corporation":false,"usgs":true,"family":"Wolfert","given":"M.","email":"","affiliations":[],"preferred":false,"id":427884,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70030580,"text":"70030580 - 2007 - Survival of wood duck ducklings and broods in Mississippi and Alabama","interactions":[],"lastModifiedDate":"2012-03-12T17:21:13","indexId":"70030580","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":"Survival of wood duck ducklings and broods in Mississippi and Alabama","docAbstract":"Although North American wood ducks (Aix sponsa) are well-studied throughout their range, researchers know little about demographic and environmental factors influencing survival of ducklings and broods, which is necessary information for population management. We studied radiomarked female and duckling wood ducks that used nest boxes and palustrine wetlands at Noxubee National Wildlife Refuge (NNWR) in Mississippi, USA, in 1996-1999, and riverine wetlands of the Tennessee-Tombigbee Rivers and Waterway (TTRW) system in Alabama in 1998-1999. We estimated survival of ducklings and broods and evaluated potentially important predictors of duckling survival, including age and body mass of brood-rearing females, hatch date of ducklings, duckling mass, brood size at nest departure, inter-day travel distance by ducklings, site and habitat use, and daily minimum air temperature and precipitation. At NNWR, survival of 300 radiomarked ducklings ranged from 0.15 (95% CI = 0.04-0.27) to 0.24 (95% CI = 0.13-0.38) and was 0.21 (95% CI = 0.15-0.28) for 1996-1999. Our overall estimate of brood survival was 0.64 (n = 91; 95% CI = 0.54-0.73). At TTRW, survival of 129 radiomarked ducklings was 0.29 in 1998 (95% CI = 0.20-0.41) and 1999 (95% CI = 0.13-0.45) and was 0.29 (95% CI = 0.20-0.40) for 1998-1999. Our overall estimate of brood survival was 0.71 (n = 38; 95% CI = 0.56-0.85). At NNWR, models that included all predictor variables best explained variation in duckling survival. Akaike weight (wi) for the best model was 0.81, suggesting it was superior to other models (<0.01 ??? wi ???0.18). We detected 4 competing models for duckling survival at TTRW. Inter-day distance traveled by ducklings was important as this variable appeared in all 4 models; duckling survival was positively related to this variable. Patterns of habitat-related survival were similar at both study areas. Ducklings in broods that used scrub-shrub habitats disjunct from wetlands containing aggregations of nest boxes had greater survival probabilities than birds remaining in wetlands with such nest structures. Managers may increase local wood duck recruitment by promoting availability of suitable brood habitats (e.g., scrub-shrub wetlands) without aggregations of nest boxes that may attract predators and by dispersing nest boxes amid or adjacent to these habitats. We did not determine an optimal density of nest boxes relative to local or regional population goals, which remains important research and conservation needs.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Wildlife Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2193/2005-720","issn":"00225","usgsCitation":"Davis, J.B., Cox, R.R., Kaminski, R., and Leopold, B., 2007, Survival of wood duck ducklings and broods in Mississippi and Alabama: Journal of Wildlife Management, v. 71, no. 2, p. 507-517, https://doi.org/10.2193/2005-720.","startPage":"507","endPage":"517","numberOfPages":"11","costCenters":[],"links":[{"id":239596,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212157,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2193/2005-720"}],"volume":"71","issue":"2","noUsgsAuthors":false,"publicationDate":"2010-12-13","publicationStatus":"PW","scienceBaseUri":"505ba2e3e4b08c986b31fa2b","contributors":{"authors":[{"text":"Davis, J. B. hdavis@usgs.gov","contributorId":81838,"corporation":false,"usgs":false,"family":"Davis","given":"J.","email":"hdavis@usgs.gov","middleInitial":"B.","affiliations":[],"preferred":false,"id":427733,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cox, R. R. Jr.","contributorId":57006,"corporation":false,"usgs":true,"family":"Cox","given":"R.","suffix":"Jr.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":427731,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kaminski, R.M.","contributorId":53330,"corporation":false,"usgs":true,"family":"Kaminski","given":"R.M.","email":"","affiliations":[],"preferred":false,"id":427730,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Leopold, B.D.","contributorId":72738,"corporation":false,"usgs":true,"family":"Leopold","given":"B.D.","email":"","affiliations":[],"preferred":false,"id":427732,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70030547,"text":"70030547 - 2007 - Status and habitat use of the California black rail in the Southwestern USA","interactions":[],"lastModifiedDate":"2020-09-10T17:15:36.92358","indexId":"70030547","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3750,"text":"Wetlands","onlineIssn":"1943-6246","printIssn":"0277-5212","active":true,"publicationSubtype":{"id":10}},"title":"Status and habitat use of the California black rail in the Southwestern USA","docAbstract":"<p><span>California black rails (</span><i>Laterallus jamaicensis coturniculus</i><span>) occur in two disjunct regions: the southwestern USA (western Arizona and southern California) and northern California (Sacramento Valley and the San Francisco Bay area). We examined current status of black rails in the southwestern USA by repeating survey efforts first conducted in 1973–1974 and again in 1989, and also examined wetland plant species associated with black rail distribution and abundance. We detected 136 black rails in Arizona and southern California. Black rail numbers detected during past survey efforts were much higher than the numbers detected during our more intensive survey effort, and hence, populations have obviously declined. Plants that were more common at points with black rails included common threesquare (</span><i>Schoenoplectus pungens</i><span>), arrowweed (</span><i>Pluchea sericea</i><span>), Fremont cottonwood (</span><i>Populus fremontii</i><span>), seepwillow (</span><i>Baccharis salicifolia</i><span>), and mixed shrubs, with common threesquare showing the strongest association with black rail presence. Plant species and non-vegetative communities that were less common at points with black rails included California bulrush (</span><i>Schoenoplectus californicus</i><span>), southern cattail (</span><i>Typha domingensis</i><span>), upland vegetation, and open water. Black rails were often present at sites that had some saltcedar (</span><i>Tamarix ramosissima</i><span>), but were rarely detected in areas dominated by saltcedar. We recommend that a standardized black rail survey effort be repeated annually to obtain estimates of black rail population trends. Management of existing emergent marshes with black rails is needed to maintain stands of common threesquare in early successional stages. Moreover, wetland restoration efforts that produce diverse wetland vegetation including common threesquare should be implemented to ensure that black rail populations persist in the southwestern USA.</span></p>","language":"English","publisher":"Springer","doi":"10.1672/0277-5212(2007)27[987:SAHUOT]2.0.CO;2","usgsCitation":"Conway, C., and Sulzman, C., 2007, Status and habitat use of the California black rail in the Southwestern USA: Wetlands, v. 27, no. 4, p. 987-998, https://doi.org/10.1672/0277-5212(2007)27[987:SAHUOT]2.0.CO;2.","productDescription":"12 p.","startPage":"987","endPage":"998","numberOfPages":"12","costCenters":[],"links":[{"id":239072,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Arizona, California","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -114.81262207031249,\n              32.72721987021932\n            ],\n            [\n              -114.3182373046875,\n              32.72721987021932\n            ],\n            [\n              -114.3182373046875,\n              33.15594830078649\n            ],\n            [\n              -114.81262207031249,\n              33.15594830078649\n            ],\n            [\n              -114.81262207031249,\n              32.72721987021932\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"27","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9789e4b08c986b31bb02","contributors":{"authors":[{"text":"Conway, C.J.","contributorId":33417,"corporation":false,"usgs":true,"family":"Conway","given":"C.J.","email":"","affiliations":[],"preferred":false,"id":427599,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sulzman, C.","contributorId":101079,"corporation":false,"usgs":true,"family":"Sulzman","given":"C.","affiliations":[],"preferred":false,"id":427600,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70030326,"text":"70030326 - 2007 - Remaining uncertainties in the use of Rn-222 as a quantitative tracer of submarine groundwater discharge","interactions":[],"lastModifiedDate":"2012-03-12T17:21:02","indexId":"70030326","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Remaining uncertainties in the use of Rn-222 as a quantitative tracer of submarine groundwater discharge","docAbstract":"Research performed in many locations over the past decade has shown that radon is an effective tracer for quantifying submarine groundwater discharge (SGD). The technique works because both fresh and saline groundwaters acquire radon from the subterranean environment and display activities that are typically orders of magnitude greater than those found in coastal seawaters. However, some uncertainties and unanswered problems remain. We focus here on three components of the mass balance, each of which has some unresolved issues: (1) End-member radon - what to do if groundwater Rn measurements are highly variable? (2) Atmospheric evasion -do the standard gas exchange equations work under high-energy coastal mixing scenarios? And (3) \"mixing\" losses - are there other significant radon losses (e.g. recharge of coastal waters into the aquifer) besides those attributed to mixing with lower-activity waters offshore? We address these issues using data sets collected from several different types of coastal environment. Copyright ?? 2007 IAHS Press.","largerWorkTitle":"IAHS-AISH Publication","conferenceTitle":"International Symposium: A New Focus on Groundwater - Seawater Interactions - 24th General Assembly of the In","conferenceDate":"2 July 2007 through 13 July 2007","conferenceLocation":"Perugia","language":"English","issn":"01447","isbn":"9781901502046","usgsCitation":"Burnett, W.C., Santos, I., Weinstein, Y., Swarzenski, P., and Herut, B., 2007, Remaining uncertainties in the use of Rn-222 as a quantitative tracer of submarine groundwater discharge, <i>in</i> IAHS-AISH Publication, no. 312, Perugia, 2 July 2007 through 13 July 2007, p. 109-118.","startPage":"109","endPage":"118","numberOfPages":"10","costCenters":[],"links":[{"id":239441,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"312","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aa6c2e4b0c8380cd85033","contributors":{"authors":[{"text":"Burnett, W. C.","contributorId":39779,"corporation":false,"usgs":false,"family":"Burnett","given":"W.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":426705,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Santos, I.R.","contributorId":94499,"corporation":false,"usgs":true,"family":"Santos","given":"I.R.","email":"","affiliations":[],"preferred":false,"id":426706,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Weinstein, Y.","contributorId":100186,"corporation":false,"usgs":true,"family":"Weinstein","given":"Y.","email":"","affiliations":[],"preferred":false,"id":426707,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"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":426704,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Herut, B.","contributorId":101444,"corporation":false,"usgs":true,"family":"Herut","given":"B.","affiliations":[],"preferred":false,"id":426708,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70030209,"text":"70030209 - 2007 - Statistical analysis of water-quality data containing multiple detection limits II: S-language software for nonparametric distribution modeling and hypothesis testing","interactions":[],"lastModifiedDate":"2012-03-12T17:21:01","indexId":"70030209","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1315,"text":"Computers & Geosciences","printIssn":"0098-3004","active":true,"publicationSubtype":{"id":10}},"title":"Statistical analysis of water-quality data containing multiple detection limits II: S-language software for nonparametric distribution modeling and hypothesis testing","docAbstract":"Analysis of low concentrations of trace contaminants in environmental media often results in left-censored data that are below some limit of analytical precision. Interpretation of values becomes complicated when there are multiple detection limits in the data-perhaps as a result of changing analytical precision over time. Parametric and semi-parametric methods, such as maximum likelihood estimation and robust regression on order statistics, can be employed to model distributions of multiply censored data and provide estimates of summary statistics. However, these methods are based on assumptions about the underlying distribution of data. Nonparametric methods provide an alternative that does not require such assumptions. A standard nonparametric method for estimating summary statistics of multiply-censored data is the Kaplan-Meier (K-M) method. This method has seen widespread usage in the medical sciences within a general framework termed \"survival analysis\" where it is employed with right-censored time-to-failure data. However, K-M methods are equally valid for the left-censored data common in the geosciences. Our S-language software provides an analytical framework based on K-M methods that is tailored to the needs of the earth and environmental sciences community. This includes routines for the generation of empirical cumulative distribution functions, prediction or exceedance probabilities, and related confidence limits computation. Additionally, our software contains K-M-based routines for nonparametric hypothesis testing among an unlimited number of grouping variables. A primary characteristic of K-M methods is that they do not perform extrapolation and interpolation. Thus, these routines cannot be used to model statistics beyond the observed data range or when linear interpolation is desired. For such applications, the aforementioned parametric and semi-parametric methods must be used.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Computers and Geosciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.cageo.2006.09.006","issn":"00983004","usgsCitation":"Lee, L., and Helsel, D., 2007, Statistical analysis of water-quality data containing multiple detection limits II: S-language software for nonparametric distribution modeling and hypothesis testing: Computers & Geosciences, v. 33, no. 5, p. 696-704, https://doi.org/10.1016/j.cageo.2006.09.006.","startPage":"696","endPage":"704","numberOfPages":"9","costCenters":[],"links":[{"id":211885,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.cageo.2006.09.006"},{"id":239259,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"33","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9716e4b08c986b31b891","contributors":{"authors":[{"text":"Lee, L.","contributorId":77730,"corporation":false,"usgs":true,"family":"Lee","given":"L.","email":"","affiliations":[],"preferred":false,"id":426135,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Helsel, D.","contributorId":94492,"corporation":false,"usgs":true,"family":"Helsel","given":"D.","email":"","affiliations":[],"preferred":false,"id":426136,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70030208,"text":"70030208 - 2007 - Efficiency of conventional drinking-water-treatment processes in removal of pharmaceuticals and other organic compounds","interactions":[],"lastModifiedDate":"2018-10-17T10:52:39","indexId":"70030208","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3352,"text":"Science of the Total Environment","active":true,"publicationSubtype":{"id":10}},"title":"Efficiency of conventional drinking-water-treatment processes in removal of pharmaceuticals and other organic compounds","docAbstract":"<p>Samples of water and sediment from a conventional drinking-water-treatment (DWT) plant were analyzed for 113 organic compounds (OCs) that included pharmaceuticals, detergent degradates, flame retardants and plasticizers, polycyclic aromatic hydrocarbons (PAHs), fragrances and flavorants, pesticides and an insect repellent, and plant and animal steroids. 45 of these compounds were detected in samples of source water and 34 were detected in samples of settled sludge and (or) filter-backwash sediments. The average percent removal of these compounds was calculated from their average concentration in time-composited water samples collected after clarification, disinfection (chlorination), and granular-activated-carbon (GAC) filtration. In general, GAC filtration accounted for 53% of the removal of these compounds from the aqueous phase; disinfection accounted for 32%, and clarification accounted for 15%. The effectiveness of these treatments varied widely within and among classes of compounds; some hydrophobic compounds were strongly oxidized by free chlorine, and some hydrophilic compounds were partly removed through adsorption processes. The detection of 21 of the compounds in 1 or more samples of finished water, and of 3 to 13 compounds in every finished-water sample, indicates substantial but incomplete degradation or removal of OCs through the conventional DWT process used at this plant.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Science of the Total Environment","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.scitotenv.2007.01.095","issn":"00489697","usgsCitation":"Stackelberg, P.E., Gibs, J., Furlong, E.T., Meyer, M.T., Zaugg, S.D., and Lippincott, R., 2007, Efficiency of conventional drinking-water-treatment processes in removal of pharmaceuticals and other organic compounds: Science of the Total Environment, v. 377, no. 2-3, p. 255-272, https://doi.org/10.1016/j.scitotenv.2007.01.095.","productDescription":"18 p.","startPage":"255","endPage":"272","numberOfPages":"18","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":239258,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211884,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.scitotenv.2007.01.095"}],"volume":"377","issue":"2-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0866e4b0c8380cd51adb","contributors":{"authors":[{"text":"Stackelberg, Paul E. 0000-0002-1818-355X pestack@usgs.gov","orcid":"https://orcid.org/0000-0002-1818-355X","contributorId":1069,"corporation":false,"usgs":true,"family":"Stackelberg","given":"Paul","email":"pestack@usgs.gov","middleInitial":"E.","affiliations":[{"id":474,"text":"New York Water Science Center","active":true,"usgs":true}],"preferred":true,"id":426129,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gibs, Jacob jgibs@usgs.gov","contributorId":1729,"corporation":false,"usgs":true,"family":"Gibs","given":"Jacob","email":"jgibs@usgs.gov","affiliations":[],"preferred":true,"id":426132,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Furlong, Edward T. 0000-0002-7305-4603 efurlong@usgs.gov","orcid":"https://orcid.org/0000-0002-7305-4603","contributorId":740,"corporation":false,"usgs":true,"family":"Furlong","given":"Edward","email":"efurlong@usgs.gov","middleInitial":"T.","affiliations":[{"id":27111,"text":"National Water Quality Program","active":true,"usgs":true},{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true},{"id":5046,"text":"Branch of Analytical Serv (NWQL)","active":true,"usgs":true},{"id":503,"text":"Office of Water Quality","active":true,"usgs":true}],"preferred":true,"id":426134,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Meyer, Michael T. 0000-0001-6006-7985 mmeyer@usgs.gov","orcid":"https://orcid.org/0000-0001-6006-7985","contributorId":866,"corporation":false,"usgs":true,"family":"Meyer","given":"Michael","email":"mmeyer@usgs.gov","middleInitial":"T.","affiliations":[{"id":353,"text":"Kansas Water Science Center","active":false,"usgs":true}],"preferred":true,"id":426133,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Zaugg, Steven D. sdzaugg@usgs.gov","contributorId":768,"corporation":false,"usgs":true,"family":"Zaugg","given":"Steven","email":"sdzaugg@usgs.gov","middleInitial":"D.","affiliations":[],"preferred":true,"id":426131,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Lippincott, R.L.","contributorId":73817,"corporation":false,"usgs":true,"family":"Lippincott","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":426130,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70030207,"text":"70030207 - 2007 - Daily foraging patterns of adult Double-crested Cormorants during the breeding season","interactions":[],"lastModifiedDate":"2012-03-12T17:21:01","indexId":"70030207","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":"Daily foraging patterns of adult Double-crested Cormorants during the breeding season","docAbstract":"We recorded the daily presence of Double-crested Cormorants (Phalacrocorax auritus) at the nesting island on Oneida Lake, New York, by monitoring the activities of 15 radio-tagged adults from July through September, 2000, using an automated data-logging receiver. A total of 24,464 acceptable detections was obtained for adult cormorants actively attempting to nest on the lake. Tagged cormorants had a bimodal dally activity pattern during the first month, with the fewest birds detected on the island at 09.00 h and 15.00 h Eastern daylight time. The pattern of activity appeared to change slightly in the second month of the study, representative of a post-breeding period for the colony, with a shift from a less synchronous pattern of departures to a greater focus on morning activity also centered around 09.30 h. These results correspond with daily observations of Great Cormorant (P. carbo) foraging activities reported for colonies in Africa and Poland. The data also support the possibility of nocturnal foraging activity, not previously reported for this species on their summer breeding grounds. No correlation was found between total number of daily detections and climatalogical factors or events.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Waterbirds","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1675/1524-4695(2007)30[189:DFPOAD]2.0.CO;2","issn":"15244695","usgsCitation":"Coleman, J., and Richmond, M.E., 2007, Daily foraging patterns of adult Double-crested Cormorants during the breeding season: Waterbirds, v. 30, no. 2, p. 189-198, https://doi.org/10.1675/1524-4695(2007)30[189:DFPOAD]2.0.CO;2.","startPage":"189","endPage":"198","numberOfPages":"10","costCenters":[],"links":[{"id":211853,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1675/1524-4695(2007)30[189:DFPOAD]2.0.CO;2"},{"id":239224,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"30","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fd5be4b0c8380cd4e7c4","contributors":{"authors":[{"text":"Coleman, J.T.H.","contributorId":86156,"corporation":false,"usgs":true,"family":"Coleman","given":"J.T.H.","email":"","affiliations":[],"preferred":false,"id":426128,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Richmond, M. E.","contributorId":22729,"corporation":false,"usgs":true,"family":"Richmond","given":"M.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":426127,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70030206,"text":"70030206 - 2007 - Stream ecosystem response to limestone treatment in acid impacted watersheds of the allegheny plateau","interactions":[],"lastModifiedDate":"2012-03-12T17:21:01","indexId":"70030206","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1450,"text":"Ecological Applications","active":true,"publicationSubtype":{"id":10}},"title":"Stream ecosystem response to limestone treatment in acid impacted watersheds of the allegheny plateau","docAbstract":"Restoration programs are expanding worldwide, but assessments of restoration effectiveness are rare. The objectives of our study were to assess current acid-precipitation remediation programs in streams of the Allegheny Plateau ecoregion of West Virginia (USA), identify specific attributes that could and could not be fully restored, and quantify temporal trends in ecosystem recovery. We sampled water chemistry, physical habitat, periphyton biomass, and benthic macroinvertebrate and fish community structure in three stream types: acidic (four streams), naturally circumneutral (eight streams), and acidic streams treated with limestone sand (eight streams). We observed no temporal trends in ecosystem recovery in treated streams despite sampling streams that ranged from 2 to 20 years since initial treatment. Our results indicated that the application of limestone sand to acidic streams was effective in fully recovering some characteristics, such as pH, alkalinity, Ca2+, Ca:H ratios, trout biomass and density, and trout reproductive success. However, recovery of many other characteristics was strongly dependent upon spatial proximity to treatment, and still others were never fully recovered. For example, limestone treatment did not restore dissolved aluminum concentrations, macroinvertebrate taxon richness, and total fish biomass to circumneutral reference conditions. Full recovery may not be occurring because treated streams continue to drain acidic watersheds and remain isolated in a network of acidic streams. We propose a revised stream restoration plan for the Allegheny Plateau that includes restoring stream ecosystems as connected networks rather than isolated reaches and recognizes that full recovery of acidified watersheds may not be possible. ?? 2007 by the Ecological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecological Applications","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1890/06-0392","issn":"10510761","usgsCitation":"McClurg, S., Petty, J., Mazik, P.M., and Clayton, J., 2007, Stream ecosystem response to limestone treatment in acid impacted watersheds of the allegheny plateau: Ecological Applications, v. 17, no. 4, p. 1087-1104, https://doi.org/10.1890/06-0392.","startPage":"1087","endPage":"1104","numberOfPages":"18","costCenters":[],"links":[{"id":477192,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1890/06-0392","text":"Publisher Index Page"},{"id":211852,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1890/06-0392"},{"id":239223,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9a70e4b08c986b31c938","contributors":{"authors":[{"text":"McClurg, S.E.","contributorId":22577,"corporation":false,"usgs":true,"family":"McClurg","given":"S.E.","email":"","affiliations":[],"preferred":false,"id":426124,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Petty, J.T.","contributorId":61644,"corporation":false,"usgs":true,"family":"Petty","given":"J.T.","email":"","affiliations":[],"preferred":false,"id":426125,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mazik, P. M.","contributorId":14185,"corporation":false,"usgs":true,"family":"Mazik","given":"P.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":426123,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Clayton, J.L.","contributorId":76767,"corporation":false,"usgs":true,"family":"Clayton","given":"J.L.","email":"","affiliations":[],"preferred":false,"id":426126,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70030202,"text":"70030202 - 2007 - A new comprehensive approach to characterizing carbonaceous aerosol with an application to wintertime Fresno, California PM2.5","interactions":[],"lastModifiedDate":"2012-03-12T17:21:02","indexId":"70030202","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":923,"text":"Atmospheric Chemistry and Physics Discussions","active":true,"publicationSubtype":{"id":10}},"title":"A new comprehensive approach to characterizing carbonaceous aerosol with an application to wintertime Fresno, California PM2.5","docAbstract":"Fine particulate matter (PM2.5) samples were collected during a three week winter period in Fresno (CA). A composite sample was characterized by isolating several distinct fractions and characterizing them by infrared and nuclear magnetic resonance (NMR) spectroscopy. More than 80% of the organic matter in the aerosol samples was recovered and characterized. Only 35% of the organic matter was water soluble with another third soluble in dichloromethane and the remainder insoluble. Within the isolated water soluble material, hydrophobic acid and hydrophilic acids plus neutrals fractions contained the largest amounts of carbon. The hydrophobic acids fraction appears to contain significant amounts of lignin type structures, spectra of the hydrophilic acids plus neutrals fraction are indicative of carbohydrates and secondary organic material. The dichloromethane soluble fraction contains a variety of organic compound families typical of many previous studies of organic aerosol speciation, including alkanes, alkanols, alkanals and alkanoic acids. Finally the water and solvent insoluble fraction exhibits a strong aromaticity as one would expect from black or elemental carbon like material; however, these spectra also show a substantial amount of aliphaticity consistent with linear side chains on the aromatic structures.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Atmospheric Chemistry and Physics Discussions","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"16807367","usgsCitation":"Herckes, P., Leenheer, J., and Collett, J., 2007, A new comprehensive approach to characterizing carbonaceous aerosol with an application to wintertime Fresno, California PM2.5: Atmospheric Chemistry and Physics Discussions, v. 7, no. 3, p. 8423-8453.","startPage":"8423","endPage":"8453","numberOfPages":"31","costCenters":[],"links":[{"id":239156,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"7","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e49de4b0c8380cd46788","contributors":{"authors":[{"text":"Herckes, P.","contributorId":32729,"corporation":false,"usgs":true,"family":"Herckes","given":"P.","email":"","affiliations":[],"preferred":false,"id":426113,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Leenheer, J.A.","contributorId":75123,"corporation":false,"usgs":true,"family":"Leenheer","given":"J.A.","affiliations":[],"preferred":false,"id":426115,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Collett, J.L. Jr.","contributorId":42426,"corporation":false,"usgs":true,"family":"Collett","given":"J.L.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":426114,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030200,"text":"70030200 - 2007 - Seasonal variations in modern speleothem calcite growth in Central Texas, U.S.A","interactions":[],"lastModifiedDate":"2012-03-12T17:21:01","indexId":"70030200","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2451,"text":"Journal of Sedimentary Research","onlineIssn":"1938-3681","printIssn":"1527-1404","active":true,"publicationSubtype":{"id":10}},"title":"Seasonal variations in modern speleothem calcite growth in Central Texas, U.S.A","docAbstract":"Variations in growth rates of speleothem calcite have been hypothesized to reflect changes in a range of paleoenvironmental variables, including atmospheric temperature and precipitation, drip-water composition, and the rate of soil CO2 delivery to the subsurface. To test these hypotheses, we quantified growth rates of modern speleothem calcite on artificial substrates and monitored concurrent environmental conditions in three caves across the Edwards Plateau in central Texas. Within each of two caves, different drip sites exhibit similar annual cycles in calcite growth rates, even though there are large differences between the mean growth rates at the sites. The growth-rate cycles inversely correlate to seasonal changes in regional air temperature outside the caves, with near-zero growth rates during the warmest summer months, and peak growth rates in fall through spring. Drip sites from caves 130 km apart exhibit similar temporal patterns in calcite growth rate, indicating a controlling mechanism on at least this distance. The seasonal variations in calcite growth rate can be accounted for by a primary control by regional temperature effects on ventilation of cave-air CO2 concentrations and/or drip-water CO2 contents. In contrast, site-to-site differences in the magnitude of calcite growth rates within an individual cave appear to be controlled principally by differences in drip rate. A secondary control by drip rate on the growth rate temporal variations is suggested by interannual variations. No calcite growth was observed in the third cave, which has relatively high values of and small seasonal changes in cave-air CO2. These results indicate that growth-rate variations in ancient speleothems may serve as a paleoenvironmental proxy with seasonal resolution. By applying this approach of monitoring the modern system, speleothem growth rate and geochemical proxies for paleoenviromnental change may be evaluated and calibrated. Copyright ?? 2007, SEPM (Society for Sedimentary Geology).","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Sedimentary Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2110/jsr.2007.065","issn":"15271404","usgsCitation":"Banner, J., Guilfoyle, A., James, E., Stern, L., and Musgrove, M., 2007, Seasonal variations in modern speleothem calcite growth in Central Texas, U.S.A: Journal of Sedimentary Research, v. 77, no. 7-8, p. 615-622, https://doi.org/10.2110/jsr.2007.065.","startPage":"615","endPage":"622","numberOfPages":"8","costCenters":[],"links":[{"id":211769,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2110/jsr.2007.065"},{"id":239121,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"77","issue":"7-8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b88f2e4b08c986b316c58","contributors":{"authors":[{"text":"Banner, J.L.","contributorId":95683,"corporation":false,"usgs":true,"family":"Banner","given":"J.L.","email":"","affiliations":[],"preferred":false,"id":426108,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Guilfoyle, A.","contributorId":88950,"corporation":false,"usgs":true,"family":"Guilfoyle","given":"A.","affiliations":[],"preferred":false,"id":426107,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"James, E.W.","contributorId":68532,"corporation":false,"usgs":true,"family":"James","given":"E.W.","email":"","affiliations":[],"preferred":false,"id":426105,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Stern, L.A.","contributorId":38293,"corporation":false,"usgs":true,"family":"Stern","given":"L.A.","email":"","affiliations":[],"preferred":false,"id":426104,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Musgrove, M.","contributorId":78933,"corporation":false,"usgs":true,"family":"Musgrove","given":"M.","email":"","affiliations":[],"preferred":false,"id":426106,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
]}