{"pageNumber":"953","pageRowStart":"23800","pageSize":"25","recordCount":40807,"records":[{"id":70029831,"text":"70029831 - 2007 - Role of hydrous iron oxide formation in attenuation and diel cycling of dissolved trace metals in a stream affected by acid rock drainage","interactions":[],"lastModifiedDate":"2018-10-17T13:19:06","indexId":"70029831","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3728,"text":"Water, Air, & Soil Pollution","onlineIssn":"1573-2932","printIssn":"0049-6979","active":true,"publicationSubtype":{"id":10}},"title":"Role of hydrous iron oxide formation in attenuation and diel cycling of dissolved trace metals in a stream affected by acid rock drainage","docAbstract":"<p>Mining-impacted streams have been shown to undergo diel (24-h) fluctuations in concentrations of major and trace elements. Fisher Creek in south-central Montana, USA receives acid rock drainage (ARD) from natural and mining-related sources. A previous diel field study found substantial changes in dissolved metal concentrations at three sites with differing pH regimes during a 24-h period in August 2002. The current work discusses follow-up field sampling of Fisher Creek as well as field and laboratory experiments that examine in greater detail the underlying processes involved in the observed diel concentration changes. The field experiments employed in-stream chambers that were either transparent or opaque to light, filled with stream water and sediment (cobbles coated with hydrous Fe and Al oxides), and placed in the stream to maintain the same temperature. Three sets of laboratory experiments were performed: (1) equilibration of a Cu(II) and Zn(II) containing solution with Fisher Creek stream sediment at pH 6.9 and different temperatures; (2) titration of Fisher Creek water from pH 3.1 to 7 under four different isothermal conditions; and (3) analysis of the effects of temperature on the interaction of an Fe(II) containing solution with Fisher Creek stream sediment under non-oxidizing conditions. Results of these studies are consistent with a model in which Cu, Fe(II), and to a lesser extent Zn, are adsorbed or co-precipitated with hydrous Fe and Al oxides as the pH of Fisher Creek increases from 5.3 to 7.0. The extent of metal attenuation is strongly temperature-dependent, being more pronounced in warm vs. cold water. Furthermore, the sorption/co-precipitation process is shown to be irreversible; once the Cu, Zn, and Fe(II) are removed from solution in warm water, a decrease in temperature does not release the metals back to the water column.</p>","language":"English","publisher":"Springer","doi":"10.1007/s11270-006-9297-5","usgsCitation":"Parker, S.R., Gammons, C.H., Jones, C.A., and Nimick, D.A., 2007, Role of hydrous iron oxide formation in attenuation and diel cycling of dissolved trace metals in a stream affected by acid rock drainage: Water, Air, & Soil Pollution, v. 181, no. 1-4, p. 247-263, https://doi.org/10.1007/s11270-006-9297-5.","productDescription":"17 p.","startPage":"247","endPage":"263","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240209,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Montana","otherGeospatial":"Fisher Creek","volume":"181","issue":"1-4","noUsgsAuthors":false,"publicationDate":"2006-12-08","publicationStatus":"PW","scienceBaseUri":"505aae55e4b0c8380cd87090","contributors":{"authors":[{"text":"Parker, Stephen R.","contributorId":140802,"corporation":false,"usgs":false,"family":"Parker","given":"Stephen","email":"","middleInitial":"R.","affiliations":[{"id":13574,"text":"Montana Tech of the University of Montana, Butte, MT","active":true,"usgs":false}],"preferred":false,"id":424517,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gammons, Chris","contributorId":140801,"corporation":false,"usgs":false,"family":"Gammons","given":"Chris","affiliations":[{"id":13574,"text":"Montana Tech of the University of Montana, Butte, MT","active":true,"usgs":false}],"preferred":false,"id":424516,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Jones, Clain A.","contributorId":69917,"corporation":false,"usgs":false,"family":"Jones","given":"Clain","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":424518,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nimick, David A. dnimick@usgs.gov","contributorId":421,"corporation":false,"usgs":true,"family":"Nimick","given":"David","email":"dnimick@usgs.gov","middleInitial":"A.","affiliations":[{"id":5050,"text":"WY-MT Water Science Center","active":true,"usgs":true},{"id":573,"text":"Special Applications Science Center","active":true,"usgs":true}],"preferred":true,"id":424519,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70029830,"text":"70029830 - 2007 - Distribution and accumulation of mercury in tissues of captive-reared common loon (Gavia immer) chicks","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029830","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1571,"text":"Environmental Toxicology and Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"Distribution and accumulation of mercury in tissues of captive-reared common loon (Gavia immer) chicks","docAbstract":"We determined the distribution and accumulation of Hg in tissues of common loon (Gavia immer) chicks maintained for up to 15 weeks on either a control diet with no added methylmercury chloride (MeHgCl) or one containing either 0.4 or 1.2 ??g Hg (as MeHgCl)/g wet-weight food. Total Hg and MeHg tissue concentrations were strongly positively correlated (r2 > 0.95) with the amount of Hg delivered to individual chicks throughout the course of the experiment. The pattern of differential Hg concentration in internal tissues was consistent within each treatment: Liver > kidney > muscle > carcass > brain. Feather Hg concentrations were consistently higher than those of internal tissues and represented an important route of Hg elimination. Feather mass accounted for 4.3% ?? 0.1% (average ?? standard error) of body mass, yet 27.3% ?? 2.6% of total Hg intake was excreted into feathers. Our calculations indicate that 26.7% ?? 4.9% of ingested Hg was not accounted for and, thus, either was never absorbed or was absorbed and subsequently eliminated in feces. With the additional excretion into feathers, 54% of ingested Hg was excreted. Demethylation was evident in the liver at all treatment levels and in the kidneys of chicks dosed at 1.2 ??g Hg/g. Mercury concentrations were strongly positively correlated (r2 ??? 0.95) among internal tissues and with blood Hg concentration. Mercury concentrations of secondary feathers were moderately correlated (r2 = 0.82-0.93) with internal tissues. We supply regression models that may be used to provide perspective and a useful means of interpreting the variety of measures of Hg exposure reported in the literature. ?? 2007 SETAC.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Toxicology and Chemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1897/06-193R.1","issn":"07307268","usgsCitation":"Kenow, K., Meyer, M., Hines, R.K., and Karasov, W.H., 2007, Distribution and accumulation of mercury in tissues of captive-reared common loon (Gavia immer) chicks: Environmental Toxicology and Chemistry, v. 26, no. 5, p. 1047-1055, https://doi.org/10.1897/06-193R.1.","startPage":"1047","endPage":"1055","numberOfPages":"9","costCenters":[],"links":[{"id":212683,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1897/06-193R.1"},{"id":240208,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"26","issue":"5","noUsgsAuthors":false,"publicationDate":"2007-05-01","publicationStatus":"PW","scienceBaseUri":"505a027ae4b0c8380cd50075","contributors":{"authors":[{"text":"Kenow, K.P.","contributorId":18302,"corporation":false,"usgs":true,"family":"Kenow","given":"K.P.","affiliations":[],"preferred":false,"id":424512,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Meyer, M.W.","contributorId":38094,"corporation":false,"usgs":true,"family":"Meyer","given":"M.W.","email":"","affiliations":[],"preferred":false,"id":424515,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hines, R. K.","contributorId":27819,"corporation":false,"usgs":true,"family":"Hines","given":"R.","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":424514,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Karasov, W. H.","contributorId":25889,"corporation":false,"usgs":false,"family":"Karasov","given":"W.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":424513,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70032085,"text":"70032085 - 2007 - Linking occurrence and fitness to persistence: Habitat-based approach for endangered Greater Sage-Grouse","interactions":[],"lastModifiedDate":"2017-12-27T15:10:17","indexId":"70032085","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":"Linking occurrence and fitness to persistence: Habitat-based approach for endangered Greater Sage-Grouse","docAbstract":"Detailed empirical models predicting both species occurrence and fitness across a landscape are necessary to understand processes related to population persistence. Failure to consider both occurrence and fitness may result in incorrect assessments of habitat importance leading to inappropriate management strategies. We took a two-stage approach to identifying critical nesting and brood-rearing habitat for the endangered Greater Sage-Grouse (Centrocercus urophasianus) in Alberta at a landscape scale. First, we used logistic regression to develop spatial models predicting the relative probability of use (occurrence) for Sage-Grouse nests and broods. Secondly, we used Cox proportional hazards survival models to identify the most risky habitats across the landscape. We combined these two approaches to identify Sage-Grouse habitats that pose minimal risk of failure (source habitats) and attractive sink habitats that pose increased risk (ecological traps). Our models showed that Sage-Grouse select for heterogeneous patches of moderate sagebrush cover (quadratic relationship) and avoid anthropogenic edge habitat for nesting. Nests were more successful in heterogeneous habitats, but nest success was independent of anthropogenic features. Similarly, broods selected heterogeneous high-productivity habitats with sagebrush while avoiding human developments, cultivated cropland, and high densities of oil wells. Chick mortalities tended to occur in proximity to oil and gas developments and along riparian habitats. For nests and broods, respectively, approximately 10% and 5% of the study area was considered source habitat, whereas 19% and 15% of habitat was attractive sink habitat. Limited source habitats appear to be the main reason for poor nest success (39%) and low chick survival (12%). Our habitat models identify areas of protection priority and areas that require immediate management attention to enhance recruitment to secure the viability of this population. This novel approach to habitat-based population viability modeling has merit for many species of concern. ?? 2007 by the Ecological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecological Applications","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1890/05-1871","issn":"10510761","usgsCitation":"Aldridge, C.L., and Boyce, M.S., 2007, Linking occurrence and fitness to persistence: Habitat-based approach for endangered Greater Sage-Grouse: Ecological Applications, v. 17, no. 2, p. 508-526, https://doi.org/10.1890/05-1871.","startPage":"508","endPage":"526","numberOfPages":"19","costCenters":[],"links":[{"id":242500,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214750,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1890/05-1871"}],"volume":"17","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a47d9e4b0c8380cd67a10","contributors":{"authors":[{"text":"Aldridge, Cameron L. 0000-0003-3926-6941 aldridgec@usgs.gov","orcid":"https://orcid.org/0000-0003-3926-6941","contributorId":191773,"corporation":false,"usgs":true,"family":"Aldridge","given":"Cameron","email":"aldridgec@usgs.gov","middleInitial":"L.","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":false,"id":434473,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Boyce, Mark S.","contributorId":113205,"corporation":false,"usgs":false,"family":"Boyce","given":"Mark","email":"","middleInitial":"S.","affiliations":[{"id":12980,"text":"Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada","active":true,"usgs":false}],"preferred":false,"id":434472,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029812,"text":"70029812 - 2007 - Circum-Arctic petroleum systems identified using decision-tree chemometrics","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029812","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":701,"text":"American Association of Petroleum Geologists Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Circum-Arctic petroleum systems identified using decision-tree chemometrics","docAbstract":"Source- and age-related biomarker and isotopic data were measured for more than 1000 crude oil samples from wells and seeps collected above approximately 55??N latitude. A unique, multitiered chemometric (multivariate statistical) decision tree was created that allowed automated classification of 31 genetically distinct circumArctic oil families based on a training set of 622 oil samples. The method, which we call decision-tree chemometrics, uses principal components analysis and multiple tiers of K-nearest neighbor and SIMCA (soft independent modeling of class analogy) models to classify and assign confidence limits for newly acquired oil samples and source rock extracts. Geochemical data for each oil sample were also used to infer the age, lithology, organic matter input, depositional environment, and identity of its source rock. These results demonstrate the value of large petroleum databases where all samples were analyzed using the same procedures and instrumentation. Copyright ?? 2007. The American Association of Petroleum Geologists. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"American Association of Petroleum Geologists Bulletin","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1306/12290606097","issn":"01491423","usgsCitation":"Peters, K.E., Ramos, L., Zumberge, J., Valin, Z., Scotese, C., and Gautier, D.L., 2007, Circum-Arctic petroleum systems identified using decision-tree chemometrics: American Association of Petroleum Geologists Bulletin, v. 91, no. 6, p. 877-913, https://doi.org/10.1306/12290606097.","startPage":"877","endPage":"913","numberOfPages":"37","costCenters":[],"links":[{"id":212920,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1306/12290606097"},{"id":240485,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"91","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f605e4b0c8380cd4c55a","contributors":{"authors":[{"text":"Peters, K. E.","contributorId":17295,"corporation":false,"usgs":true,"family":"Peters","given":"K.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":424430,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ramos, L.S.","contributorId":47503,"corporation":false,"usgs":true,"family":"Ramos","given":"L.S.","email":"","affiliations":[],"preferred":false,"id":424432,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zumberge, J.E.","contributorId":37867,"corporation":false,"usgs":true,"family":"Zumberge","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":424431,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Valin, Z. C. 0000-0001-6199-6700","orcid":"https://orcid.org/0000-0001-6199-6700","contributorId":75165,"corporation":false,"usgs":true,"family":"Valin","given":"Z. C.","affiliations":[],"preferred":false,"id":424434,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Scotese, C.R.","contributorId":16138,"corporation":false,"usgs":true,"family":"Scotese","given":"C.R.","affiliations":[],"preferred":false,"id":424429,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Gautier, D. L.","contributorId":69996,"corporation":false,"usgs":true,"family":"Gautier","given":"D.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":424433,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70029805,"text":"70029805 - 2007 - Distributed energy-balance modeling of snow-cover evolution and melt in rugged terrain: Tobacco Root Mountains, Montana, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029805","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Distributed energy-balance modeling of snow-cover evolution and melt in rugged terrain: Tobacco Root Mountains, Montana, USA","docAbstract":"A distributed energy-balance model was developed for simulating snowpack evolution and melt in rugged terrain. The model, which was applied to a 43-km2 watershed in the Tobacco Root Mountains, Montana, USA, used measured ambient data from nearby weather stations to drive energy-balance calculations and to constrain the model of Liston and Sturm [Liston, G.E., Sturm, M., 1998. A snow-transport model for complex terrain. Journal of Glaciology 44 (148), 498-516] for calculating the initial snowpack thickness. Simulated initial snow-water equivalent ranged between 1 cm and 385 cm w.e. (water equivalent) with high values concentrated on east-facing slopes below tall summits. An interpreted satellite image of the snowcover distribution on May 6, 1998, closely matched the simulated distribution with the greatest discrepancy occurring in the floor of the main trunk valley. Model simulations indicated that snowmelt commenced early in the melt season, but rapid meltout of snow cover did not occur until after the average energy balance of the entire watershed became positive about 45 days into the melt season. Meltout was fastest in the lower part of the watershed where warmer temperatures and tree cover enhanced the energy income of the underlying snow. An interpreted satellite image of the snowcover distribution on July 9, 1998 compared favorably with the simulated distribution, and melt curves for modeled canopy-covered cells mimicked the trends measured at nearby snow pillow stations. By the end of the simulation period (August 3), 28% of the watershed remained snow covered, most of which was concentrated in the highest parts of the watershed where initially thick accumulations had been shaded by surrounding summits. The results of this study provide further demonstration of the critical role that topography plays in the timing and magnitude of snowmelt from high mountain watersheds. ?? 2006 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jhydrol.2006.12.012","issn":"00221694","usgsCitation":"Letsinger, S., and Olyphant, G., 2007, Distributed energy-balance modeling of snow-cover evolution and melt in rugged terrain: Tobacco Root Mountains, Montana, USA: Journal of Hydrology, v. 336, no. 1-2, p. 48-60, https://doi.org/10.1016/j.jhydrol.2006.12.012.","startPage":"48","endPage":"60","numberOfPages":"13","costCenters":[],"links":[{"id":212805,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jhydrol.2006.12.012"},{"id":240349,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"336","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0254e4b0c8380cd4ffe8","contributors":{"authors":[{"text":"Letsinger, S.L.","contributorId":50731,"corporation":false,"usgs":true,"family":"Letsinger","given":"S.L.","affiliations":[],"preferred":false,"id":424403,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Olyphant, G.A.","contributorId":51023,"corporation":false,"usgs":true,"family":"Olyphant","given":"G.A.","email":"","affiliations":[],"preferred":false,"id":424404,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70033644,"text":"70033644 - 2007 - Effect of an offshore sinkhole perforation in a coastal confined aquifer on submarine groundwater discharge","interactions":[],"lastModifiedDate":"2012-03-12T17:21:33","indexId":"70033644","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Effect of an offshore sinkhole perforation in a coastal confined aquifer on submarine groundwater discharge","docAbstract":"In order to explore submarine groundwater discharge in the vicinity of karst features that penetrate the confining layer of an offshore, partially confined aquifer, we constructed a three-dimensional groundwater model using the SUTRA (Saturated-Unsaturated TRAnsport) variable-density groundwater flow model. We ran a parameter sensitivity analysis, testing the effects of recharge rates, permeabilities of the aquifer and confining layer, and thickness of the confining layer. In all simulations, less than 20% of the freshwater recharge for the entire model exits through the sinkhole. Recirculated seawater usually accounts for 10-30% of the total outflow from the model. Often, the sinkhole lies seaward of the transition zone and acts as a recharge feature for recirculating seawater. The permeability ratio between aquifer and confining layer influences the configuration of the freshwater wedge the most; as confining layer permeability decreases, the wedge lengthens and the fraction of total discharge exiting through the sinkhole increases. 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":"Fratesi, S., Leonard, V., and Sanford, W., 2007, Effect of an offshore sinkhole perforation in a coastal confined aquifer on submarine groundwater discharge, <i>in</i> IAHS-AISH Publication, no. 312, Perugia, 2 July 2007 through 13 July 2007, p. 256-263.","startPage":"256","endPage":"263","numberOfPages":"8","costCenters":[],"links":[{"id":242160,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"312","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a05bee4b0c8380cd50f24","contributors":{"authors":[{"text":"Fratesi, S.E.","contributorId":74971,"corporation":false,"usgs":true,"family":"Fratesi","given":"S.E.","email":"","affiliations":[],"preferred":false,"id":441814,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Leonard, V.","contributorId":32741,"corporation":false,"usgs":true,"family":"Leonard","given":"V.","email":"","affiliations":[],"preferred":false,"id":441813,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"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":441815,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031173,"text":"70031173 - 2007 - Selection of den sites by black bears in the southern Appalachians","interactions":[],"lastModifiedDate":"2012-03-12T17:21:17","indexId":"70031173","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2373,"text":"Journal of Mammalogy","onlineIssn":"1545-1542","printIssn":"0022-2372","active":true,"publicationSubtype":{"id":10}},"title":"Selection of den sites by black bears in the southern Appalachians","docAbstract":"We evaluated selection of den sites by American black bears (Ursus americanus) in the Pisgah Bear Sanctuary, western North Carolina, by comparing characteristics of dens at 53 den sites with availability of habitat characteristics in annual home ranges of bears and in the study area. We also tested whether den-site selection differed by sex, age, and reproductive status of bears. In addition, we evaluated whether the den component of an existing habitat model for black bears predicted where bears would select den sites. We found bears selected den sites far from gravel roads, on steep slopes, and at high elevations relative to what was available in both annual home ranges and in the study area. Den-site selection did not differ by sex or age, but it differed by reproductive status. Adult females with cubs preferred to den in areas that were relatively far from gravel roads, but adult females without cubs did not. The habitat model overestimated the value of areas near gravel roads, underestimated the value of moderately steep areas, and did not include elevation as a predictor variable. Our results highlight the importance of evaluating den selection in terms of both use and availability of den characteristics. ?? 2007 American Society of Mammalogists.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Mammalogy","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1644/06-MAMM-A-329R1.1","issn":"00222372","usgsCitation":"Reynolds-Hogland, M.J., Mitchell, M., Powell, R.A., and Brown, D., 2007, Selection of den sites by black bears in the southern Appalachians: Journal of Mammalogy, v. 88, no. 4, p. 1062-1073, https://doi.org/10.1644/06-MAMM-A-329R1.1.","startPage":"1062","endPage":"1073","numberOfPages":"12","costCenters":[],"links":[{"id":211461,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1644/06-MAMM-A-329R1.1"},{"id":238753,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"88","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-08-20","publicationStatus":"PW","scienceBaseUri":"505b8ccee4b08c986b318135","contributors":{"authors":[{"text":"Reynolds-Hogland, M. J.","contributorId":57647,"corporation":false,"usgs":true,"family":"Reynolds-Hogland","given":"M.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":430360,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mitchell, M.S.","contributorId":26724,"corporation":false,"usgs":true,"family":"Mitchell","given":"M.S.","email":"","affiliations":[],"preferred":false,"id":430358,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Powell, R. A.","contributorId":41789,"corporation":false,"usgs":true,"family":"Powell","given":"R.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":430359,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Brown, D.C.","contributorId":70995,"corporation":false,"usgs":true,"family":"Brown","given":"D.C.","email":"","affiliations":[],"preferred":false,"id":430361,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70030832,"text":"70030832 - 2007 - Predicting the next storm surge flood","interactions":[],"lastModifiedDate":"2012-03-12T17:21:19","indexId":"70030832","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3363,"text":"Sea Technology","active":true,"publicationSubtype":{"id":10}},"title":"Predicting the next storm surge flood","docAbstract":"The Virginia Institute of Marine Science (VIMS), National Weather Services (NWS) Sterling and Wakefield, Weather Forecast Offices (WFO), and the Chesapeake Bay Observing System (CBOS) jointly developed a prototype system of a regional capability to address national problem. The system was developed to integrate high-resolution atmospheric and hydrodynamic and storm surge models, evaluate the ability of the prototype to predict land inundation in the Washington, D.C., and provide flooding results to Emergency Managers (EM) using portive. The system is a potential tool for NWS WFOs to provide support to the EMs, first in the Chesapeake Bay region and then in other coastal regions by applying similar approaches in other coastal and Great Lakes regions. The Chesapeake Inundation Prediction System (CIPS) also is building on the initial prototype to predict the combined effects of storm surge and tidal and river flow inundation in the Chesapeake Bay and its tributaries.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Sea Technology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"00933651","usgsCitation":"Stamey, B., Wang, H., and Koterba, M., 2007, Predicting the next storm surge flood: Sea Technology, v. 48, no. 8, p. 10-15.","startPage":"10","endPage":"15","numberOfPages":"6","costCenters":[],"links":[{"id":238729,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"48","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a81d2e4b0c8380cd7b759","contributors":{"authors":[{"text":"Stamey, B.","contributorId":12190,"corporation":false,"usgs":true,"family":"Stamey","given":"B.","email":"","affiliations":[],"preferred":false,"id":428875,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wang, Hongfang","contributorId":92635,"corporation":false,"usgs":true,"family":"Wang","given":"Hongfang","email":"","affiliations":[],"preferred":false,"id":428876,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Koterba, M.","contributorId":102199,"corporation":false,"usgs":true,"family":"Koterba","given":"M.","email":"","affiliations":[],"preferred":false,"id":428877,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70033579,"text":"70033579 - 2007 - Dynamics of newly established elk populations","interactions":[],"lastModifiedDate":"2018-01-05T10:49:35","indexId":"70033579","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":"Dynamics of newly established elk populations","docAbstract":"The dynamics of newly established elk (Cervus elaphus) populations can provide insights about maximum sustainable rates of reproduction, survival, and increase. However, data used to estimate rates of increase typically have been limited to counts and rarely have included complementary estimates of vital rates. Complexities of population dynamics cannot be understood without considering population processes as well as population states. We estimated pregnancy rates, survival rates, age ratios, and sex ratios for reintroduced elk at Theodore Roosevelt National Park, North Dakota, USA; combined vital rates in a population projection model; and compared model projections with observed elk numbers and population ratios. Pregnancy rates in January (early in the second trimester of pregnancy) averaged 54.1% (SE = 5.4%) for subadults and 91.0% (SE = 1.7%) for adults, and 91.6% of pregnancies resulted in recruitment at 8 months. Annual survival rates of adult females averaged 0.96 (95% CI = 0.94-0.98) with hunting included and 0.99 (95% CI = 0.97-0.99) with hunting excluded from calculations. Our fitted model explained 99.8% of past variation in population estimates and represents a useful new tool for short-term management planning. Although we found no evidence of temporal variation in vital rates, variation in population composition caused substantial variation in projected rates of increase (??=1.20-1.36). Restoring documented hunter harvests and removals of elk by the National Park Service led to a potential rate of ?? = 1.26. Greater rates of increase substantiated elsewhere were within the expected range of chance variation, given our model and estimates of vital rates. Rates of increase realized by small elk populations are too variable to support inferences about habitat quality or density dependence.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Wildlife Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2193/2006-247","issn":"00225","usgsCitation":"Sargeant, G., and Oehler, M., 2007, Dynamics of newly established elk populations: Journal of Wildlife Management, v. 71, no. 4, p. 1141-1148, https://doi.org/10.2193/2006-247.","productDescription":"8 p.","startPage":"1141","endPage":"1148","costCenters":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":242089,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214366,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2193/2006-247"}],"volume":"71","issue":"4","noUsgsAuthors":false,"publicationDate":"2010-12-13","publicationStatus":"PW","scienceBaseUri":"505a0435e4b0c8380cd50858","contributors":{"authors":[{"text":"Sargeant, G.A.","contributorId":51681,"corporation":false,"usgs":true,"family":"Sargeant","given":"G.A.","email":"","affiliations":[],"preferred":false,"id":441517,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Oehler, M.W. Sr.","contributorId":105545,"corporation":false,"usgs":true,"family":"Oehler","given":"M.W.","suffix":"Sr.","email":"","affiliations":[],"preferred":false,"id":441518,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70032153,"text":"70032153 - 2007 - Three-dimensional P-wave velocity structure derived from local earthquakes at the Katmai group of volcanoes, Alaska","interactions":[],"lastModifiedDate":"2019-03-04T14:51:22","indexId":"70032153","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2499,"text":"Journal of Volcanology and Geothermal Research","active":true,"publicationSubtype":{"id":10}},"title":"Three-dimensional P-wave velocity structure derived from local earthquakes at the Katmai group of volcanoes, Alaska","docAbstract":"<p><span>The three-dimensional P-wave velocity structure beneath the Katmai group of volcanoes is determined by inversion of more than 10,000 rays from over 1000 earthquakes recorded on a local 18 station short-period network between September 1996 and May 2001. The inversion is well constrained from sea level to about 6&nbsp;km below sea level and encompasses all of the Katmai volcanoes; Martin, Mageik, Trident, Griggs, Novarupta, Snowy, and Katmai caldera. The inversion reduced the average RMS travel-time error from 0.22&nbsp;s for locations from the standard one-dimensional model to 0.13&nbsp;s for the best three-dimensional model. The final model, from the 6th inversion step, reveals a prominent low velocity zone (3.6–5.0&nbsp;km/s) centered at Katmai Pass and extending from Mageik to Trident volcanoes. The anomaly has values about 20–25% slower than velocities outboard of the region (5.0–6.5&nbsp;km/s). Moderately low velocities (4.5–6.0&nbsp;km/s) are observed along the volcanic axis between Martin and Katmai Caldera. Griggs volcano, located about 10&nbsp;km behind (northwest of) the volcanic axis, has unremarkable velocities (5.0–5.7&nbsp;km/s) compared to non-volcanic regions. The highest velocities are observed between Snowy and Griggs volcanoes (5.5–6.5&nbsp;km/s). Relocated hypocenters for the best 3-D model are shifted significantly relative to the standard model with clusters of seismicity at Martin volcano shifting systematically deeper by about 1&nbsp;km to depths of 0 to 4&nbsp;km below sea level. Hypocenters for the Katmai Caldera are more tightly clustered, relocating beneath the 1912 scarp walls. The relocated hypocenters allow us to compare spatial frequency-size distributions (</span><i>b</i><span>-values) using one-dimensional and three-dimensional models. We find that the distribution of&nbsp;</span><i>b</i><span>&nbsp;is significantly changed for Martin volcano, which was characterized by variable values (0.8</span><span>&nbsp;</span><span>&lt;</span><span>&nbsp;</span><i>b</i><span>&nbsp;</span><span>&lt;</span><span>&nbsp;</span><span>2.0) with standard locations and more uniform values (0.8</span><span>&nbsp;</span><span>&lt;</span><span>&nbsp;</span><i>b</i><span>&nbsp;</span><span>&lt;</span><span>&nbsp;</span><span>1.2) after relocation. Other seismic clusters at Mageik (1.2</span><span>&nbsp;</span><span>&lt;</span><span>&nbsp;</span><i>b</i><span>&nbsp;</span><span>&lt;</span><span>&nbsp;</span><span>2.2), Trident (0.5</span><span>&nbsp;</span><span>&lt;</span><span>&nbsp;</span><i>b</i><span>&nbsp;</span><span>&lt;</span><span>&nbsp;</span><span>1.5) and Katmai Caldera (0.8</span><span>&nbsp;</span><span>&lt;</span><span>&nbsp;</span><i>b</i><span>&nbsp;</span><span>&lt;</span><span>&nbsp;</span><span>1.8) had stable&nbsp;</span><i>b</i><span>-values indicating the robustness of the observations. The strong high&nbsp;</span><i>b</i><span>-value region at Mageik volcano is mainly associated with an earthquake swarm in October, 1996 that possibly indicates a shallow intrusion or influx of gas. The new velocity and spatial&nbsp;</span><i>b</i><span>-value results, in conjunction with prior gravity (Bouguer anomalies up to −</span><span>&nbsp;</span><span>40&nbsp;mgal) and interferometry (several cm uplift) data, provide strong evidence in favor of partially molten rock at shallow depths beneath the Mageik–Katmai–Novarupta region. Moderately low velocities beneath Martin and Katmai suggest that old, mostly solidified intrusions exist beneath these volcanoes. Higher relative velocities beneath the Griggs and Snowy vents suggest that no magma is resident in the shallow crust beneath these volcanoes.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.jvolgeores.2006.06.022","issn":"03770273","usgsCitation":"Jolly, A., Moran, S., McNutt, S., and Stone, D., 2007, Three-dimensional P-wave velocity structure derived from local earthquakes at the Katmai group of volcanoes, Alaska: Journal of Volcanology and Geothermal Research, v. 159, no. 4, p. 326-342, https://doi.org/10.1016/j.jvolgeores.2006.06.022.","productDescription":"17 p.","startPage":"326","endPage":"342","costCenters":[{"id":615,"text":"Volcano Hazards Program","active":true,"usgs":true}],"links":[{"id":242473,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":214723,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jvolgeores.2006.06.022"}],"volume":"159","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb320e4b08c986b325bc6","contributors":{"authors":[{"text":"Jolly, A.D.","contributorId":64274,"corporation":false,"usgs":true,"family":"Jolly","given":"A.D.","affiliations":[],"preferred":false,"id":434757,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Moran, S.C. 0000-0001-7308-9649","orcid":"https://orcid.org/0000-0001-7308-9649","contributorId":78896,"corporation":false,"usgs":true,"family":"Moran","given":"S.C.","affiliations":[],"preferred":false,"id":434758,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McNutt, S.R.","contributorId":26722,"corporation":false,"usgs":true,"family":"McNutt","given":"S.R.","email":"","affiliations":[],"preferred":false,"id":434756,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Stone, D.B.","contributorId":17266,"corporation":false,"usgs":true,"family":"Stone","given":"D.B.","email":"","affiliations":[],"preferred":false,"id":434755,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031184,"text":"70031184 - 2007 - Lithology-derived structure classification from the joint interpretation of magnetotelluric and seismic models","interactions":[],"lastModifiedDate":"2012-03-12T17:21:17","indexId":"70031184","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1803,"text":"Geophysical Journal International","active":true,"publicationSubtype":{"id":10}},"title":"Lithology-derived structure classification from the joint interpretation of magnetotelluric and seismic models","docAbstract":"Magnetotelluric and seismic methods provide complementary information about the resistivity and velocity structure of the subsurface on similar scales and resolutions. No global relation, however, exists between these parameters, and correlations are often valid for only a limited target area. Independently derived inverse models from these methods can be combined using a classification approach to map geologic structure. The method employed is based solely on the statistical correlation of physical properties in a joint parameter space and is independent of theoretical or empirical relations linking electrical and seismic parameters. Regions of high correlation (classes) between resistivity and velocity can in turn be mapped back and re-examined in depth section. The spatial distribution of these classes, and the boundaries between them, provide structural information not evident in the individual models. This method is applied to a 10 km long profile crossing the Dead Sea Transform in Jordan. Several prominent classes are identified with specific lithologies in accordance with local geology. An abrupt change in lithology across the fault, together with vertical uplift of the basement suggest the fault is sub-vertical within the upper crust. ?? 2007 The Authors Journal compilation ?? 2007 RAS.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geophysical Journal International","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1365-246X.2007.03440.x","issn":"0956540X","usgsCitation":"Bedrosian, P.A., Maercklin, N., Weckmann, U., Bartov, Y., Ryberg, T., and Ritter, O., 2007, Lithology-derived structure classification from the joint interpretation of magnetotelluric and seismic models: Geophysical Journal International, v. 170, no. 2, p. 737-748, https://doi.org/10.1111/j.1365-246X.2007.03440.x.","startPage":"737","endPage":"748","numberOfPages":"12","costCenters":[],"links":[{"id":487681,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1365-246x.2007.03440.x","text":"Publisher Index Page"},{"id":238819,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211519,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1365-246X.2007.03440.x"}],"volume":"170","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4892e4b0c8380cd67f65","contributors":{"authors":[{"text":"Bedrosian, P. A.","contributorId":100109,"corporation":false,"usgs":true,"family":"Bedrosian","given":"P.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":430412,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Maercklin, N.","contributorId":81302,"corporation":false,"usgs":true,"family":"Maercklin","given":"N.","email":"","affiliations":[],"preferred":false,"id":430410,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Weckmann, U.","contributorId":14186,"corporation":false,"usgs":true,"family":"Weckmann","given":"U.","email":"","affiliations":[],"preferred":false,"id":430407,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bartov, Y.","contributorId":65230,"corporation":false,"usgs":true,"family":"Bartov","given":"Y.","email":"","affiliations":[],"preferred":false,"id":430409,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ryberg, T.","contributorId":91643,"corporation":false,"usgs":true,"family":"Ryberg","given":"T.","email":"","affiliations":[],"preferred":false,"id":430411,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Ritter, O.","contributorId":33515,"corporation":false,"usgs":true,"family":"Ritter","given":"O.","email":"","affiliations":[],"preferred":false,"id":430408,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031185,"text":"70031185 - 2007 - Comparison of earthquake source spectra and attenuation in eastern North America and southeastern Australia","interactions":[],"lastModifiedDate":"2012-03-12T17:21:17","indexId":"70031185","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"title":"Comparison of earthquake source spectra and attenuation in eastern North America and southeastern Australia","docAbstract":"The paucity of ground-motion data in stable continental regions (SCRs) remains a key limitation when developing relations that seek to predict effects of strong ground shaking from large damaging earthquakes. It is desirable to combine data from more than one SCR to increase database size, but this raises questions as to whether the source and attenuation properties of the SCRs are equivalent. We compare recently compiled spectral-amplitude databases from small to moderate events (moment magnitudes, 2.0 ??? M ??? 5.0) in both southeastern Australia and eastern North America (ENA). Both are SCRs but are widely separated, spatially and in tectonic history. We statistically compare ground motions by plotting mean and standard deviations of spectral amplitudes for data grouped in magnitude and distance bins. These comparisons show that the source and attenuation properties of the two regions are very similar, in particular, at shorter hypocentral distances R (i.e., R < 70 km). At larger distances, regional attenuation differences are observed that may be attributed to differences in crustal structure. We conclude that it is valid to combine the Australian and ENA ground-motion datasets in the development of ground-motion prediction equations, with some limitations in frequency and distance ranges. These ground-motion relations may serve as generic functions for SCRs around the world.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bulletin of the Seismological Society of America","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1785/0120060206","issn":"00371106","usgsCitation":"Allen, T., and Atkinson, G.M., 2007, Comparison of earthquake source spectra and attenuation in eastern North America and southeastern Australia: Bulletin of the Seismological Society of America, v. 97, no. 4, p. 1350-1354, https://doi.org/10.1785/0120060206.","startPage":"1350","endPage":"1354","numberOfPages":"5","costCenters":[],"links":[{"id":211546,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1785/0120060206"},{"id":238848,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"97","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f85de4b0c8380cd4d05d","contributors":{"authors":[{"text":"Allen, T.I.","contributorId":6659,"corporation":false,"usgs":true,"family":"Allen","given":"T.I.","email":"","affiliations":[],"preferred":false,"id":430413,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Atkinson, G. M.","contributorId":69283,"corporation":false,"usgs":true,"family":"Atkinson","given":"G.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":430414,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031186,"text":"70031186 - 2007 - Mineralogic constraints on sulfur-rich soils from Pancam spectra at Gusev crater, Mars","interactions":[],"lastModifiedDate":"2012-03-12T17:21:17","indexId":"70031186","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":"Mineralogic constraints on sulfur-rich soils from Pancam spectra at Gusev crater, Mars","docAbstract":"The Mars Exploration Rover (MER) Spirit excavated sulfur-rich soils exhibiting high albedo and relatively white to yellow colors at three main locations on and south of Husband Hill in Gusev crater, Mars. The multispectral visible/near-infrared properties of these disturbed soils revealed by the Pancam stereo color camera vary appreciably over small spatial scales, but exhibit spectral features suggestive of ferric sulfates. Spectral mixture models constrain the mineralogy of these soils to include ferric sulfates in various states of hydration, such as ferricopiapite [Fe2/32+Fe43+ (SO4)6(OH)2??20(H2O)], hydronium jarosite [(H3O)Fe33+ (SO4)2(OH)6], fibroferrite [Fe3+(SO4)(OH)??5(H2O)], rhomboclase [HFe3+(SO4)2??4 (H2O)], and paracoquimbite [Fe23+ (SO4)3.9(H2O)]. Copyright 2007 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geophysical Research Letters","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2007GL029894","issn":"00948276","usgsCitation":"Johnson, J.R., Bell, J., Cloutis, E., Staid, M., Farrand, W.H., McCoy, T., Rice, M., Wang, A., and Yen, A., 2007, Mineralogic constraints on sulfur-rich soils from Pancam spectra at Gusev crater, Mars: Geophysical Research Letters, v. 34, no. 13, https://doi.org/10.1029/2007GL029894.","costCenters":[],"links":[{"id":477204,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2007gl029894","text":"Publisher Index Page"},{"id":211547,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2007GL029894"},{"id":238849,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"34","issue":"13","noUsgsAuthors":false,"publicationDate":"2007-07-06","publicationStatus":"PW","scienceBaseUri":"505a5a8ae4b0c8380cd6ef53","contributors":{"authors":[{"text":"Johnson, J. R.","contributorId":69278,"corporation":false,"usgs":true,"family":"Johnson","given":"J.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":430421,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bell, J.F.","contributorId":36663,"corporation":false,"usgs":true,"family":"Bell","given":"J.F.","affiliations":[],"preferred":false,"id":430416,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Cloutis, E.","contributorId":90184,"corporation":false,"usgs":true,"family":"Cloutis","given":"E.","email":"","affiliations":[],"preferred":false,"id":430423,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Staid, M.","contributorId":68561,"corporation":false,"usgs":true,"family":"Staid","given":"M.","email":"","affiliations":[],"preferred":false,"id":430420,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Farrand, W. H.","contributorId":64372,"corporation":false,"usgs":true,"family":"Farrand","given":"W.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":430419,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"McCoy, T.","contributorId":56776,"corporation":false,"usgs":true,"family":"McCoy","given":"T.","email":"","affiliations":[],"preferred":false,"id":430418,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Rice, M.","contributorId":32283,"corporation":false,"usgs":true,"family":"Rice","given":"M.","affiliations":[],"preferred":false,"id":430415,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Wang, A.","contributorId":46735,"corporation":false,"usgs":true,"family":"Wang","given":"A.","email":"","affiliations":[],"preferred":false,"id":430417,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Yen, A.","contributorId":76054,"corporation":false,"usgs":true,"family":"Yen","given":"A.","affiliations":[],"preferred":false,"id":430422,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}}
,{"id":70033408,"text":"70033408 - 2007 - Landscape correlates along mourning dove call-count routes in Mississippi","interactions":[],"lastModifiedDate":"2012-03-12T17:21:38","indexId":"70033408","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Landscape correlates along mourning dove call-count routes in Mississippi","docAbstract":"Mourning dove (Zenaida macroura) call-count surveys in Mississippi, USA, suggest declining populations. We used available mourning dove call-count data to evaluate long-term mourning dove habitat relationships. Dove routes were located in the Mississippi Alluvial Valley, Deep Loess Province, Mid Coastal Plain, and Hilly Coastal Plain physiographic provinces of Mississippi. We also included routes in the Blackbelt Prairie region of Mississippi and Alabama, USA. We characterized landscape structure and composition within 1.64-km buffers around 10 selected mourning dove call-count routes during 3 time periods. Habitat classes included agriculture, forest, urban, regeneration stands, wetland, and woodlot. We used Akaike's Information Criterion to select the best candidate model. We selected a model containing percent agriculture and edge density that contained approximately 40% of the total variability in the data set. Percent agriculture was positively correlated with relative dove abundance. Interestingly, we found a negative relationship between edge density and dove abundance. Researchers should conduct future research on dove nesting patterns in Mississippi and threshold levels of edge necessary to maximize dove density. During the last 20 years, Mississippi lost more than 800,000 ha of cropland while forest cover represented largely by pine (Pinus taeda) plantations increased by more than 364,000 ha. Our results suggest observed localized declines in mourning dove abundance in Mississippi may be related to the documented conversion of agricultural lands to pine plantations.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Wildlife Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2193/2004-267","issn":"00225","usgsCitation":"Elmore, R., Vilella, F., and Gerard, P., 2007, Landscape correlates along mourning dove call-count routes in Mississippi: Journal of Wildlife Management, v. 71, no. 2, p. 422-427, https://doi.org/10.2193/2004-267.","startPage":"422","endPage":"427","numberOfPages":"6","costCenters":[],"links":[{"id":213142,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2193/2004-267"},{"id":240737,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"71","issue":"2","noUsgsAuthors":false,"publicationDate":"2010-12-13","publicationStatus":"PW","scienceBaseUri":"505a4409e4b0c8380cd667d2","contributors":{"authors":[{"text":"Elmore, R.D.","contributorId":64450,"corporation":false,"usgs":true,"family":"Elmore","given":"R.D.","email":"","affiliations":[],"preferred":false,"id":440746,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Vilella, F. J.","contributorId":82025,"corporation":false,"usgs":false,"family":"Vilella","given":"F. J.","affiliations":[],"preferred":false,"id":440747,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gerard, P.D.","contributorId":16368,"corporation":false,"usgs":true,"family":"Gerard","given":"P.D.","email":"","affiliations":[],"preferred":false,"id":440745,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031188,"text":"70031188 - 2007 - Three-dimensional flow in the Florida platform: Theoretical analysis of Kohout convection at its type locality","interactions":[],"lastModifiedDate":"2018-10-17T08:25:36","indexId":"70031188","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Three-dimensional flow in the Florida platform: Theoretical analysis of Kohout convection at its type locality","docAbstract":"<p>Kohout convection is the name given to the circulation of saline groundwater deep within carbonate platforms, first proposed by F.A. Kohout in the 1960s for south Florida. It is now seen as an Mg pump for dolomitization by seawater. As proposed by Kohout, cold seawater is drawn into the Florida platform from the deep Straits of Florida as part of a geothermally driven circulation in which the seawater then rises in the interior of the platform to mix and exit with the discharging meteoric water of the Floridan aquifer system. Simulation of the asymmetrically emergent Florida platform with the new three-dimensional (3-D), finite-element groundwater flow and transport model SUTRA-MS, which couples salinity- and temperature-dependent density variations, allows analysis of how much of the cyclic flow is due to geothermal heating (free convection) as opposed to mixing with meteoric water discharging to the shoreline (forced convection). Simulation of the system with and without geothermal heating reveals that the inflow of seawater from the Straits of Florida would be similar without the heat flow, but the distribution would differ significantly. The addition of heat flow reduces the asymmetry of the circulation: it decreases seawater inflows on the Atlantic side by 8% and on the Guff of Mexico side by half. The study illustrates the complex interplay of freshwater-saltwater mixing, geothermal heat flow, and projected dolomitization in complicated 3-D settings with asymmetric boundary conditions and realistic horizontal and vertical variations in hydraulic properties.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1130/G23374A.1","issn":"00917613","usgsCitation":"Hughes, J., Vacher, H.L., and Sanford, W.E., 2007, Three-dimensional flow in the Florida platform: Theoretical analysis of Kohout convection at its type locality: Geology, v. 35, no. 7, p. 663-666, https://doi.org/10.1130/G23374A.1.","productDescription":"4 p.","startPage":"663","endPage":"666","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":238821,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211521,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1130/G23374A.1"}],"country":"United States","state":"Florida","volume":"35","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb327e4b08c986b325bf4","contributors":{"authors":[{"text":"Hughes, J.D.","contributorId":25539,"corporation":false,"usgs":true,"family":"Hughes","given":"J.D.","email":"","affiliations":[],"preferred":false,"id":430430,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Vacher, H. Leonard","contributorId":90529,"corporation":false,"usgs":false,"family":"Vacher","given":"H.","email":"","middleInitial":"Leonard","affiliations":[],"preferred":false,"id":430431,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Sanford, Ward E. 0000-0002-6624-0280 wsanford@usgs.gov","orcid":"https://orcid.org/0000-0002-6624-0280","contributorId":2268,"corporation":false,"usgs":true,"family":"Sanford","given":"Ward","email":"wsanford@usgs.gov","middleInitial":"E.","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true},{"id":37778,"text":"WMA - Integrated Modeling and Prediction Division","active":true,"usgs":true}],"preferred":true,"id":430432,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70033383,"text":"70033383 - 2007 - Abundance of diurnal raptors in relation to prairie dog colonies: Implications for bird-aircraft strike hazard","interactions":[],"lastModifiedDate":"2012-03-12T17:21:35","indexId":"70033383","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":"Abundance of diurnal raptors in relation to prairie dog colonies: Implications for bird-aircraft strike hazard","docAbstract":"Some diurnal raptors are frequently observed at prairie dog (Cynomys sp.) colonies. As a result, some military installations have conducted prairie dog control activities to reduce the bird-aircraft strike hazard (BASH) potential of low-flying aircraft. To evaluate the validity of this management strategy, we assessed raptor associations with prairie dog colonies at 2 short-grass prairie study areas: southern Lubbock County, Texas, USA, and Melrose Bombing and Gunnery Range in east-central New Mexico, USA. We quantified diurnal raptors (i.e., Falconiformes) at plots occupied (colony plots) and unoccupied (noncolony plots) by black-tailed prairie dogs (Cynomys ludovicianus) at both sites throughout 2002. We compared the number of individual birds of a given species at colony and noncolony plots within each study area by season. Ferruginous hawks (Buteo regalis) and northern harriers (Circus cyaneus) were more abundant at colony plots, whereas Swainson's hawks (B. swainsoni) and American kestrels (Falco sparverius) were more abundant at noncolony plots. Red-tailed hawk (B. jamaicensis) abundance did not differ between the 2 plot types. Our results suggest prairie dog control as a method of reducing BASH potential may be effective at some sites but may be ineffective or even increase the BASH potential at others. Thus, bird-avoidance models assessing the BASH potential should be conducted on a site-specific basis using information on relative and seasonal abundances of individual raptor species and the relative strike risks they pose to aircraft.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Wildlife Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2193/2006-373","issn":"00225","usgsCitation":"Merriman, J., Boal, C.W., Bashore, T., Zwank, P., and Wester, D., 2007, Abundance of diurnal raptors in relation to prairie dog colonies: Implications for bird-aircraft strike hazard: Journal of Wildlife Management, v. 71, no. 3, p. 811-815, https://doi.org/10.2193/2006-373.","startPage":"811","endPage":"815","numberOfPages":"5","costCenters":[],"links":[{"id":241174,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213542,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2193/2006-373"}],"volume":"71","issue":"3","noUsgsAuthors":false,"publicationDate":"2010-12-13","publicationStatus":"PW","scienceBaseUri":"5059e65ee4b0c8380cd47384","contributors":{"authors":[{"text":"Merriman, J.W.","contributorId":50697,"corporation":false,"usgs":true,"family":"Merriman","given":"J.W.","email":"","affiliations":[],"preferred":false,"id":440601,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Boal, C. W.","contributorId":102614,"corporation":false,"usgs":false,"family":"Boal","given":"C.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":440603,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bashore, T.L.","contributorId":72569,"corporation":false,"usgs":true,"family":"Bashore","given":"T.L.","email":"","affiliations":[],"preferred":false,"id":440602,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Zwank, P.J.","contributorId":8961,"corporation":false,"usgs":true,"family":"Zwank","given":"P.J.","affiliations":[],"preferred":false,"id":440599,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Wester, D.B.","contributorId":29649,"corporation":false,"usgs":true,"family":"Wester","given":"D.B.","email":"","affiliations":[],"preferred":false,"id":440600,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70033382,"text":"70033382 - 2007 - Multi-channel resistivity investigations of the freshwater-saltwater interface: A new tool to study an old problem","interactions":[],"lastModifiedDate":"2023-06-21T11:17:16.154089","indexId":"70033382","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Multi-channel resistivity investigations of the freshwater-saltwater interface: A new tool to study an old problem","docAbstract":"It has been well established that fresh or brackish groundwater can exist both near and far from shore in many coastal and marine environments. The often permeable nature of marine sediments and the underlying bedrock provides abundant pathways for submarine groundwater discharge. While submarine groundwater discharge as a coastal hydrogeological phenomenon has been widely recognized, only recent advances in both geochemical tracers and geophysical tools have enabled a realistic, systematic quantification of the scales and rates of this coastal groundwater discharge. Here we present multichannel electrical resistivity results using both a time series, stationary cable that has 56 electrodes spaced 2 m apart, as well as a 120 m streaming resistivity cable that has two current-producing electrodes and eight potential electrodes spaced 10 m apart. As the cable position remains fixed in stationary mode, we can examine in high resolution tidal forcing on the freshwater-saltwater interface. Using a boat to conduct streaming resistivity surveys, relatively large spatial transects can be rapidly (travel speed -2-3 knots) acquired in shallow (-1-20 m) waters. Sediment formation factors, used to convert resistivity values to salinity, were calculated from porewater and sediment samples collected during the installation of an offshore well in Tampa Bay, Florida, USA. Here we examine the seabed resistivity from sites within Tampa Bay using both stationary and streaming configurations and discuss their overall effectiveness as a new tool to examine the dynamic nature of the freshwater-saltwater interface.","conferenceTitle":"International Symposium: A New Focus on Groundwater - Seawater Interactions - 24th General Assembly of the In","conferenceDate":"July 2-13, 2007","conferenceLocation":"Perugia","language":"English","publisher":"IAHS-AISH","issn":"01447","isbn":"9781901502046","usgsCitation":"Swarzenski, P., Kruse, S., Reich, C., and Swarzenski, W., 2007, Multi-channel resistivity investigations of the freshwater-saltwater interface: A new tool to study an old problem, International Symposium: A New Focus on Groundwater - Seawater Interactions - 24th General Assembly of the In, no. 312, Perugia, July 2-13, 2007, p. 100-106.","productDescription":"7 p.","startPage":"100","endPage":"106","numberOfPages":"7","costCenters":[],"links":[{"id":241173,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"312","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5f90e4b0c8380cd7101d","contributors":{"authors":[{"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":440595,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kruse, S.","contributorId":33103,"corporation":false,"usgs":true,"family":"Kruse","given":"S.","email":"","affiliations":[],"preferred":false,"id":440596,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Reich, C.","contributorId":41787,"corporation":false,"usgs":true,"family":"Reich","given":"C.","email":"","affiliations":[],"preferred":false,"id":440597,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Swarzenski, W.V.","contributorId":80243,"corporation":false,"usgs":true,"family":"Swarzenski","given":"W.V.","email":"","affiliations":[],"preferred":false,"id":440598,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70033247,"text":"70033247 - 2007 - Avifaunal responses to fire in southwestern montane forests along a burn severity gradient","interactions":[],"lastModifiedDate":"2012-03-12T17:21:38","indexId":"70033247","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":"Avifaunal responses to fire in southwestern montane forests along a burn severity gradient","docAbstract":"The effects of burn severity on avian communities are poorly understood, yet this information is crucial to fire management programs. To quantify avian response patterns along a burn severity gradient, we sampled 49 random plots (2001-2002) at the 17 351-ha Cerro Grande Fire (2000) in New Mexico, USA. Additionally, pre-fire avian surveys (1986-1988, 1990) created a unique opportunity to quantify avifaunal changes in 13 pre-fire transects (resampled in 2002) and to compare two designs for analyzing the effects of unplanned disturbances: after-only analysis and before-after comparisons. Distance analysis was used to calculate densities. We analyzed after-only densities for 21 species using gradient analysis, which detected a broad range of responses to increasing burn severity: (I) large significant declines, (II) weak, but significant declines, (III) no significant density changes, (IV) peak densities in low- or moderate-severity patches, (V) weak, but significant increases, and (VI) large significant increases. Overall, 71% of the species included in the after-only gradient analysis exhibited either positive or neutral density responses to fire effects across all or portions of the severity gradient (responses III-VI). We used pre/post pairs analysis to quantify density changes for 15 species using before-after comparisons; spatiotemporal variation in densities was large and confounded fire effects for most species. Only four species demonstrated significant effects of burn severity, and their densities were all higher in burned compared to unburned forests. Pre- and post-fire community similarity was high except in high-severity areas. Species richness was similar pre- and post-fire across all burn severities. Thus, ecosystem restoration programs based on the assumption that recent severe fires in Southwestern ponderosa pine forests have overriding negative ecological effects are not supported by our study of post-fire avian communities. This study illustrates the importance of quantifying burn severity and controlling confounding sources of spatiotemporal variation in studies of fire effects. After-only gradient analysis can be an efficient tool for quantifying fire effects. This analysis can also augment historical data sets that have small samples sizes coupled with high non-process variation, which limits the power of before-after comparisons. ?? 2007 by the Ecological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecological Applications","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1890/06-0253","issn":"10510761","usgsCitation":"Kotliar, N., Kennedy, P., and Ferree, K., 2007, Avifaunal responses to fire in southwestern montane forests along a burn severity gradient: Ecological Applications, v. 17, no. 2, p. 491-507, https://doi.org/10.1890/06-0253.","startPage":"491","endPage":"507","numberOfPages":"17","costCenters":[],"links":[{"id":213536,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1890/06-0253"},{"id":241166,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ef76e4b0c8380cd4a25f","contributors":{"authors":[{"text":"Kotliar, N.B.","contributorId":7649,"corporation":false,"usgs":true,"family":"Kotliar","given":"N.B.","email":"","affiliations":[],"preferred":false,"id":440002,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kennedy, P.L.","contributorId":78680,"corporation":false,"usgs":true,"family":"Kennedy","given":"P.L.","email":"","affiliations":[],"preferred":false,"id":440004,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ferree, K.","contributorId":54529,"corporation":false,"usgs":true,"family":"Ferree","given":"K.","email":"","affiliations":[],"preferred":false,"id":440003,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030813,"text":"70030813 - 2007 - Forecasting probabilistic seismic shaking for greater Tokyo from 400 years of intensity observations","interactions":[],"lastModifiedDate":"2012-03-12T17:21:03","indexId":"70030813","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1436,"text":"Earthquake Spectra","active":true,"publicationSubtype":{"id":10}},"title":"Forecasting probabilistic seismic shaking for greater Tokyo from 400 years of intensity observations","docAbstract":"The long recorded history of earthquakes in Japan affords an opportunity to forecast seismic shaking exclusively from past shaking. We calculate the time-averaged (Poisson) probability of severe shaking by using more than 10,000 intensity observations recorded since AD 1600 in a 350 km-wide box centered on Tokyo. Unlike other hazard-assessment methods, source and site effects are included without modeling, and we do not need to know the size or location of any earthquake nor the location and slip rate of any fault. The two key assumptions are that the slope of the observed frequency-intensity relation at every site is the same, and that the 400-year record is long enough to encompass the full range of seismic behavior. Tests we conduct here suggest that both assumptions are sound. The resulting 30-year probability of IJMA ??? 6 shaking (??? PGA ??? 0.4 g or MMI ??? IX) is 30%-40% in Tokyo, Kawasaki, and Yokohama, and 10% 15% in Chiba and Tsukuba. This result means that there is a 30% chance that 4 million people will be subjected to IJMA ??? 6 shaking during an average 30-year period. We also produce exceedance maps of PGA for building-code regulations, and calculate short-term hazard associated with a hypothetical catastrophe bond. Our results resemble an independent assessment developed from conventional seismic hazard analysis for greater Tokyo. ?? 2007, Earthquake Engineering Research Institute.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Earthquake Spectra","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1193/1.2753504","issn":"87552930","usgsCitation":"Bozkurt, S., Stein, R., and Toda, S., 2007, Forecasting probabilistic seismic shaking for greater Tokyo from 400 years of intensity observations: Earthquake Spectra, v. 23, no. 3, p. 525-546, https://doi.org/10.1193/1.2753504.","startPage":"525","endPage":"546","numberOfPages":"22","costCenters":[],"links":[{"id":211609,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1193/1.2753504"},{"id":238926,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-08-01","publicationStatus":"PW","scienceBaseUri":"505a1318e4b0c8380cd54507","contributors":{"authors":[{"text":"Bozkurt, S.B.","contributorId":14188,"corporation":false,"usgs":true,"family":"Bozkurt","given":"S.B.","email":"","affiliations":[],"preferred":false,"id":428796,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stein, R.S.","contributorId":8875,"corporation":false,"usgs":true,"family":"Stein","given":"R.S.","email":"","affiliations":[],"preferred":false,"id":428795,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Toda, S.","contributorId":102228,"corporation":false,"usgs":true,"family":"Toda","given":"S.","email":"","affiliations":[],"preferred":false,"id":428797,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70033210,"text":"70033210 - 2007 - Short-term disruption of a leafy spurge (Euphorbia esula) biocontrol program following herbicide application","interactions":[],"lastModifiedDate":"2018-01-02T12:31:48","indexId":"70033210","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1016,"text":"Biological Control","active":true,"publicationSubtype":{"id":10}},"title":"Short-term disruption of a leafy spurge (Euphorbia esula) biocontrol program following herbicide application","docAbstract":"Integrated pest management (IPM) for invasive plant species is being advocated by researchers and implemented by land managers, but few studies have evaluated the success of IPM programs in natural areas. We assessed the relative effects of components of an IPM program for leafy spurge (Euphorbia esula), an invasive plant, at Theodore Roosevelt National Park, North Dakota. Effects of herbicides on leafy spurge abundance and on dynamics of flea beetles (Aphthona spp.) used to control leafy spurge were evaluated over three field seasons following herbicide application. We monitored leafy spurge-infested plots with established flea beetle populations that had received picloram plus 2,4-D in September 1997 or 1998, imazapic in September 1998, versus those with no chemical treatment. Mature stem counts did not differ significantly between treated and untreated plots in 2001, suggesting that leafy spurge stands had recovered from herbicide treatment. Flea beetles were less abundant on plots with a history of herbicide treatment. Structural equation models indicated that in 2000 negative correlations between relative abundances of the two flea beetle species were greater on plots that had received herbicide treatments than on those that had not, but by 2001 no differences were apparent between treated and untreated plots. These results suggest that the most effective component of IPM for leafy spurge at this site is biological control. All herbicide effects we observed were short-lived, but the increased negative correlation between flea beetle relative abundances during 2000 implies that herbicide application may have temporarily disrupted an effective biological control program at this site. ?? 2006 Elsevier Inc. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Biological Control","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.biocontrol.2006.08.017","issn":"10499644","usgsCitation":"Larson, D., Grace, J., Rabie, P., and Andersen, P., 2007, Short-term disruption of a leafy spurge (Euphorbia esula) biocontrol program following herbicide application: Biological Control, v. 40, no. 1, p. 1-8, https://doi.org/10.1016/j.biocontrol.2006.08.017.","productDescription":"8 p.","startPage":"1","endPage":"8","costCenters":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":241127,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213498,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.biocontrol.2006.08.017"}],"volume":"40","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8eb6e4b08c986b318aca","contributors":{"authors":[{"text":"Larson, D.L. 0000-0001-5202-0634","orcid":"https://orcid.org/0000-0001-5202-0634","contributorId":69501,"corporation":false,"usgs":true,"family":"Larson","given":"D.L.","affiliations":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"preferred":false,"id":439847,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Grace, J.B. 0000-0001-6374-4726","orcid":"https://orcid.org/0000-0001-6374-4726","contributorId":38938,"corporation":false,"usgs":true,"family":"Grace","given":"J.B.","affiliations":[],"preferred":false,"id":439845,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rabie, P.A.","contributorId":65674,"corporation":false,"usgs":true,"family":"Rabie","given":"P.A.","affiliations":[],"preferred":false,"id":439846,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Andersen, P.","contributorId":84568,"corporation":false,"usgs":true,"family":"Andersen","given":"P.","email":"","affiliations":[],"preferred":false,"id":439848,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031196,"text":"70031196 - 2007 - Effects of anthropogenic developments on common Raven nesting biology in the west Mojave Desert","interactions":[],"lastModifiedDate":"2023-07-26T11:48:12.549559","indexId":"70031196","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":"Effects of anthropogenic developments on common Raven nesting biology in the west Mojave Desert","docAbstract":"<p>Subsidized predators may affect prey abundance, distribution, and demography. Common Ravens (Corvus corax) are anthropogenically subsidized throughout their range and, in the Mojave Desert, have increased in number dramatically over the last 3-4 decades. Human-provided food resources are thought to be important drivers of raven population growth, but human developments add other features as well, such as nesting platforms. From 1996 to 2000, we examined the nesting ecology of ravens in the Mojave Desert, relative to anthropogenic development. Ravens nested disproportionately near point sources of food and water subsidies (such as towns, landfills, and ponds) but not near roads (sources of road-killed carrion), even though both sources of subsidy enhanced fledging success. Initiation of breeding activity was more likely when a nest from the previous year was present at the start of a breeding season but was not affected by access to food. The relative effect of environmental modifications on fledging success varied from year to year, but the effect of access to humanprovided resources was comparatively consistent, suggesting that humans provide consistently high-quality breeding habitat for ravens. Anthropogenic land cover types in the desert are expected to promote raven population growth and to allow ravens to occupy parts of the desert that otherwise would not support them. Predatory impacts of ravens in the Mojave Desert can therefore be considered indirect effects of anthropogenic development.</p>","language":"English","publisher":"Ecological Society of America","doi":"10.1890/06-1114.1","issn":"10510761","usgsCitation":"Kristan, W., and Boarman, W., 2007, Effects of anthropogenic developments on common Raven nesting biology in the west Mojave Desert: Ecological Applications, v. 17, no. 6, p. 1703-1713, https://doi.org/10.1890/06-1114.1.","productDescription":"11 p.","startPage":"1703","endPage":"1713","numberOfPages":"11","costCenters":[],"links":[{"id":238883,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Mojave Desert","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -116.71818395045116,\n              36.09370934263055\n            ],\n            [\n              -116.71818395045116,\n              33.8807150099009\n            ],\n            [\n              -114.17044893828503,\n              33.8807150099009\n            ],\n            [\n              -114.17044893828503,\n              36.09370934263055\n            ],\n            [\n              -116.71818395045116,\n              36.09370934263055\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"17","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a068de4b0c8380cd512da","contributors":{"authors":[{"text":"Kristan, W. B. III","contributorId":106444,"corporation":false,"usgs":true,"family":"Kristan","given":"W. B.","suffix":"III","affiliations":[],"preferred":false,"id":430472,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Boarman, W.I.","contributorId":73523,"corporation":false,"usgs":true,"family":"Boarman","given":"W.I.","email":"","affiliations":[],"preferred":false,"id":430471,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70030354,"text":"70030354 - 2007 - Red-shouldered hawk occupancy surveys in central Minnesota, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:03","indexId":"70030354","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":"Red-shouldered hawk occupancy surveys in central Minnesota, USA","docAbstract":"Forest-dwelling raptors are often difficult to detect because many species occur at low density or are secretive. Broadcasting conspecific vocalizations can increase the probability of detecting forest-dwelling raptors and has been shown to be an effective method for locating raptors and assessing their relative abundance. Recent advances in statistical techniques based on presence-absence data use probabilistic arguments to derive probability of detection when it is <1 and to provide a model and likelihood-based method for estimating proportion of sites occupied. We used these maximum-likelihood models with data from red-shouldered hawk (Buteo lineatus) call-broadcast surveys conducted in central Minnesota, USA, in 1994-1995 and 2004-2005. Our objectives were to obtain estimates of occupancy and detection probability 1) over multiple sampling seasons (yr), 2) incorporating within-season time-specific detection probabilities, 3) with call type and breeding stage included as covariates in models of probability of detection, and 4) with different sampling strategies. We visited individual survey locations 2-9 times per year, and estimates of both probability of detection (range = 0.28-0.54) and site occupancy (range = 0.81-0.97) varied among years. Detection probability was affected by inclusion of a within-season time-specific covariate, call type, and breeding stage. In 2004 and 2005 we used survey results to assess the effect that number of sample locations, double sampling, and discontinued sampling had on parameter estimates. We found that estimates of probability of detection and proportion of sites occupied were similar across different sampling strategies, and we suggest ways to reduce sampling effort in a monitoring program.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Wildlife Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2193/2006-013","issn":"00225","usgsCitation":"Henneman, C., McLeod, M., and Andersen, D., 2007, Red-shouldered hawk occupancy surveys in central Minnesota, USA: Journal of Wildlife Management, v. 71, no. 2, p. 526-533, https://doi.org/10.2193/2006-013.","startPage":"526","endPage":"533","numberOfPages":"8","costCenters":[],"links":[{"id":211950,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2193/2006-013"},{"id":239338,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"71","issue":"2","noUsgsAuthors":false,"publicationDate":"2010-12-13","publicationStatus":"PW","scienceBaseUri":"50e4a3a0e4b0e8fec6cdb8de","contributors":{"authors":[{"text":"Henneman, C.","contributorId":64879,"corporation":false,"usgs":true,"family":"Henneman","given":"C.","affiliations":[],"preferred":false,"id":426816,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McLeod, M.A.","contributorId":66437,"corporation":false,"usgs":true,"family":"McLeod","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":426817,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Andersen, D. E.","contributorId":27816,"corporation":false,"usgs":true,"family":"Andersen","given":"D. E.","affiliations":[],"preferred":false,"id":426815,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70033190,"text":"70033190 - 2007 - A comparison of four geophysical methods for determining the shear wave velocity of soils","interactions":[],"lastModifiedDate":"2012-03-12T17:21:35","indexId":"70033190","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1574,"text":"Environmental & Engineering Geoscience","printIssn":"1078-7275","active":true,"publicationSubtype":{"id":10}},"title":"A comparison of four geophysical methods for determining the shear wave velocity of soils","docAbstract":"The Missouri Department of Transportation (MoDOT) routinely acquires seismic cone penetrometer (SCPT) shear wave velocity control as part of the routine investigation of soils within the Mississippi Embayment. In an effort to ensure their geotechnical investigations are as effective and efficient as possible, the SCPT tool and several available alternatives (crosshole [CH]; multichannel analysis of surface waves [MASW]; and refraction microtremor [ReMi]) were evaluated and compared on the basis of field data acquired at two test sites in southeast Missouri. These four methods were ranked in terms of accuracy, functionality, cost, other considerations, and overall utility. It is concluded that MASW data are generally more reliable than SCPT data, comparable to quality ReMi data, and only slightly less accurate than CH data. However, the other advantages of MASW generally make it a superior choice over the CH, SCPT, and ReMi methods for general soil classification purposes to depths of 30 m. MASW data are less expensive than CH data and SCPT data and can normally be acquired in areas inaccessible to drill and SCPT rigs. In contrast to the MASW tool, quality ReMi data can be acquired only in areas where there are interpretable levels of \"passive\" acoustic energy and only when the geophone array is aligned with the source(s) of such energy.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental and Engineering Geoscience","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2113/gseegeosci.13.1.11","issn":"10787275","usgsCitation":"Anderson, N., Thitimakorn, T., Ismail, A., and Hoffman, D., 2007, A comparison of four geophysical methods for determining the shear wave velocity of soils: Environmental & Engineering Geoscience, v. 13, no. 1, p. 11-23, https://doi.org/10.2113/gseegeosci.13.1.11.","startPage":"11","endPage":"23","numberOfPages":"13","costCenters":[],"links":[{"id":477191,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.514.9875","text":"External Repository"},{"id":240788,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213186,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/gseegeosci.13.1.11"}],"volume":"13","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e35ae4b0c8380cd45fbb","contributors":{"authors":[{"text":"Anderson, N.","contributorId":54403,"corporation":false,"usgs":true,"family":"Anderson","given":"N.","email":"","affiliations":[],"preferred":false,"id":439757,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Thitimakorn, T.","contributorId":75770,"corporation":false,"usgs":true,"family":"Thitimakorn","given":"T.","email":"","affiliations":[],"preferred":false,"id":439760,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ismail, A.","contributorId":60920,"corporation":false,"usgs":true,"family":"Ismail","given":"A.","email":"","affiliations":[],"preferred":false,"id":439758,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hoffman, D.","contributorId":72895,"corporation":false,"usgs":true,"family":"Hoffman","given":"D.","affiliations":[],"preferred":false,"id":439759,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70033185,"text":"70033185 - 2007 - Management of fluid mud in estuaries, bays, and lakes. II: Measurement, modeling, and management","interactions":[],"lastModifiedDate":"2018-06-01T13:49:54","indexId":"70033185","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2338,"text":"Journal of Hydraulic Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Management of fluid mud in estuaries, bays, and lakes. II: Measurement, modeling, and management","docAbstract":"<div class=\"NLM_sec NLM_sec_level_1 hlFld-Abstract\"><p>Techniques for measurement, modeling, and management of fluid mud are available, but research is needed to improve them. Fluid mud can be difficult to detect, measure, or sample, which has led to new instruments and new ways of using existing instruments. Multifrequency acoustic fathometers sense neither density nor viscosity and are, therefore, unreliable in measuring fluid mud. Nuclear density probes, towed sleds, seismic, and drop probes equipped with density meters offer the potential for accurate measurements. Numerical modeling of fluid mud requires solving governing equations for flow velocity, density, pressure, salinity, water surface, plus sediment submodels. A number of such models exist in one-, two-, and three-dimensional form, but they rely on empirical relationships that require substantial site-specific validation to observations. Management of fluid mud techniques can be classified as those that accomplish: Source control, formation control, and removal. Nautical depth, a fourth category, defines the channel bottom as a specific fluid mud density or alternative parameter as safe for navigation. Source control includes watershed management measures to keep fine sediment out of waterways and in-water measures such as structures and traps. Formation control methods include streamlined channels and structures plus other measures to reduce flocculation and structures that train currents. Removal methods include the traditional dredging and transport of dredged material plus agitation that contributes to formation control and/or nautical depth. Conditioning of fluid mud by dredging and aerating offers the possibility of improved navigability. Two examples—the Atchafalaya Bar Channel and Savannah Harbor—illustrate the use of measurements and management of fluid mud.</p></div>","language":"English","publisher":"ASCE","doi":"10.1061/(ASCE)0733-9429(2007)133:1(23)","issn":"07339429","usgsCitation":"McAnally, W., Teeter, A., Schoellhamer, D., Friedrichs, C., Hamilton, D., Hayter, E., Shrestha, P., Rodriguez, H., Sheremet, A., and Kirby, R., 2007, Management of fluid mud in estuaries, bays, and lakes. II: Measurement, modeling, and management: Journal of Hydraulic Engineering, v. 133, no. 1, p. 23-38, https://doi.org/10.1061/(ASCE)0733-9429(2007)133:1(23).","productDescription":"16 p.","startPage":"23","endPage":"38","costCenters":[],"links":[{"id":240721,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213128,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1061/(ASCE)0733-9429(2007)133:1(23)"}],"volume":"133","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4c6fe4b0c8380cd69c6c","contributors":{"authors":[{"text":"McAnally, W.H.","contributorId":47168,"corporation":false,"usgs":true,"family":"McAnally","given":"W.H.","email":"","affiliations":[],"preferred":false,"id":439734,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Teeter, A.","contributorId":46770,"corporation":false,"usgs":true,"family":"Teeter","given":"A.","email":"","affiliations":[],"preferred":false,"id":439733,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Schoellhamer, David H. 0000-0001-9488-7340 dschoell@usgs.gov","orcid":"https://orcid.org/0000-0001-9488-7340","contributorId":631,"corporation":false,"usgs":true,"family":"Schoellhamer","given":"David H.","email":"dschoell@usgs.gov","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":true,"id":439739,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Friedrichs, C.","contributorId":28361,"corporation":false,"usgs":true,"family":"Friedrichs","given":"C.","email":"","affiliations":[],"preferred":false,"id":439732,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hamilton, D.","contributorId":54316,"corporation":false,"usgs":true,"family":"Hamilton","given":"D.","affiliations":[],"preferred":false,"id":439735,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Hayter, E.","contributorId":56858,"corporation":false,"usgs":true,"family":"Hayter","given":"E.","affiliations":[],"preferred":false,"id":439736,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Shrestha, P.","contributorId":59635,"corporation":false,"usgs":true,"family":"Shrestha","given":"P.","email":"","affiliations":[],"preferred":false,"id":439737,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Rodriguez, H.","contributorId":27267,"corporation":false,"usgs":true,"family":"Rodriguez","given":"H.","email":"","affiliations":[],"preferred":false,"id":439731,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Sheremet, A.","contributorId":79306,"corporation":false,"usgs":true,"family":"Sheremet","given":"A.","email":"","affiliations":[],"preferred":false,"id":439738,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Kirby, R.","contributorId":11833,"corporation":false,"usgs":true,"family":"Kirby","given":"R.","email":"","affiliations":[],"preferred":false,"id":439730,"contributorType":{"id":1,"text":"Authors"},"rank":10}]}}
,{"id":70033183,"text":"70033183 - 2007 - Multiobjective analysis of a public wellfield using artificial neural networks","interactions":[],"lastModifiedDate":"2012-03-12T17:21:23","indexId":"70033183","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":"Multiobjective analysis of a public wellfield using artificial neural networks","docAbstract":"As competition for increasingly scarce ground water resources grows, many decision makers may come to rely upon rigorous multiobjective techniques to help identify appropriate and defensible policies, particularly when disparate stakeholder groups are involved. In this study, decision analysis was conducted on a public water supply wellfield to balance water supply needs with well vulnerability to contamination from a nearby ground water contaminant plume. With few alternative water sources, decision makers must balance the conflicting objectives of maximizing water supply volume from noncontaminated wells while minimizing their vulnerability to contamination from the plume. Artificial neural networks (ANNs) were developed with simulation data from a numerical ground water flow model developed for the study area. The ANN-derived state transition equations were embedded into a multiobjective optimization model, from which the Pareto frontier or trade-off curve between water supply and wellfield vulnerability was identified. Relative preference values and power factors were assigned to the three stakeholders, namely the company whose waste contaminated the aquifer, the community supplied by the wells, and the water utility company that owns and operates the wells. A compromise pumping policy that effectively balances the two conflicting objectives in accordance with the preferences of the three stakeholder groups was then identified using various distance-based methods. ?? 2006 National Ground Water Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1745-6584.2006.00248.x","issn":"0017467X","usgsCitation":"Coppola, E., Szidarovszky, F., Davis, D., Spayd, S., Poulton, M., and Roman, E., 2007, Multiobjective analysis of a public wellfield using artificial neural networks: Ground Water, v. 45, no. 1, p. 53-61, https://doi.org/10.1111/j.1745-6584.2006.00248.x.","startPage":"53","endPage":"61","numberOfPages":"9","costCenters":[],"links":[{"id":213591,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6584.2006.00248.x"},{"id":241229,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"45","issue":"1","noUsgsAuthors":false,"publicationDate":"2006-07-28","publicationStatus":"PW","scienceBaseUri":"505a6034e4b0c8380cd71379","contributors":{"authors":[{"text":"Coppola, E.A. Jr.","contributorId":51992,"corporation":false,"usgs":true,"family":"Coppola","given":"E.A.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":439723,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Szidarovszky, F.","contributorId":30457,"corporation":false,"usgs":true,"family":"Szidarovszky","given":"F.","email":"","affiliations":[],"preferred":false,"id":439721,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Davis, D.","contributorId":85747,"corporation":false,"usgs":true,"family":"Davis","given":"D.","affiliations":[],"preferred":false,"id":439726,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Spayd, S.","contributorId":77747,"corporation":false,"usgs":true,"family":"Spayd","given":"S.","email":"","affiliations":[],"preferred":false,"id":439725,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Poulton, M.M.","contributorId":42436,"corporation":false,"usgs":true,"family":"Poulton","given":"M.M.","email":"","affiliations":[],"preferred":false,"id":439722,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Roman, E.","contributorId":59250,"corporation":false,"usgs":true,"family":"Roman","given":"E.","email":"","affiliations":[],"preferred":false,"id":439724,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
]}