1. To elucidate factors contributing to dissolved oxygen (DO) depletion in the Stockton Deep Water Ship Channel in the lower San Joaquin River, spatial and temporal changes in algae and nutrient concentrations were investigated in relation to flow regime under the semiarid climate conditions. 2. Chlorophyll-a (chl-a) concentration and loads indicated that most algal biomass was generated by in-stream growth in the main stem of the river. The addition of algae from tributaries and drains was small (c.15% of total chl-a load), even though high concentrations of chl-a were measured in some source waters. 3. Nitrate and soluble-reactive phosphorus (SRP) were available in excess as a nutrient source for algae. Although nitrate and SRP from upstream tributaries contributed (16.9% of total nitrate load and 10.8% of total SRP load), nutrients derived from agriculture and other sources in the middle and lower river reaches were mostly responsible (20.2% for nitrate and 48.0% for SRP) for maintaining high nitrate and SRP concentrations in the main stem. 4. A reduction in nutrient discharge would attenuate the algal blooms that accelerate DO depletion in the Stockton Deep Water Ship Channel. The N : P ratio, in the main stem suggests that SRP reduction would be a more viable option for algae reduction than nitrogen reduction. 5. Very high algal growth rates in the main stem suggest that reducing the algal seed source in upstream areas would also be an effective strategy.
","largerWorkTitle":"Freshwater Biology","language":"English","publisher":"Wiley","doi":"10.1111/j.1365-2427.2007.01849.x","issn":"00465070","usgsCitation":"Ohte, N., Dahlgren, R., Silva, S.R., Kendall, C., Kratzer, C.R., and Doctor, D.H., 2007, Sources and transport of algae and nutrients in a Californian river in a semi-arid climate: Freshwater Biology, v. 52, no. 12, p. 2476-2493, https://doi.org/10.1111/j.1365-2427.2007.01849.x.","productDescription":"18 p.","startPage":"2476","endPage":"2493","numberOfPages":"18","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":212169,"rank":2,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1365-2427.2007.01849.x"},{"id":239616,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"San Joaquin River","volume":"52","issue":"12","noUsgsAuthors":false,"publicationDate":"2007-08-08","publicationStatus":"PW","scienceBaseUri":"505b935fe4b08c986b31a470","contributors":{"authors":[{"text":"Ohte, Nobuhito","contributorId":73363,"corporation":false,"usgs":false,"family":"Ohte","given":"Nobuhito","email":"","affiliations":[],"preferred":false,"id":431063,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dahlgren, Randy A.","contributorId":48630,"corporation":false,"usgs":true,"family":"Dahlgren","given":"Randy A.","affiliations":[],"preferred":false,"id":431066,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Silva, Steven R. srsilva@usgs.gov","contributorId":3162,"corporation":false,"usgs":true,"family":"Silva","given":"Steven","email":"srsilva@usgs.gov","middleInitial":"R.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":431065,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kendall, Carol 0000-0002-0247-3405 ckendall@usgs.gov","orcid":"https://orcid.org/0000-0002-0247-3405","contributorId":1462,"corporation":false,"usgs":true,"family":"Kendall","given":"Carol","email":"ckendall@usgs.gov","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":431067,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Kratzer, Charles R.","contributorId":30619,"corporation":false,"usgs":true,"family":"Kratzer","given":"Charles","email":"","middleInitial":"R.","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":431064,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Doctor, Daniel H. 0000-0002-8338-9722 dhdoctor@usgs.gov","orcid":"https://orcid.org/0000-0002-8338-9722","contributorId":2037,"corporation":false,"usgs":true,"family":"Doctor","given":"Daniel","email":"dhdoctor@usgs.gov","middleInitial":"H.","affiliations":[{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true},{"id":243,"text":"Eastern Geology and Paleoclimate Science Center","active":true,"usgs":true}],"preferred":true,"id":431068,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70031326,"text":"70031326 - 2007 - Faunal re-evaluation of Mid-Pliocene conditions in the western equatorial Pacific","interactions":[],"lastModifiedDate":"2013-02-27T15:25:54","indexId":"70031326","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2735,"text":"Micropaleontology","active":true,"publicationSubtype":{"id":10}},"title":"Faunal re-evaluation of Mid-Pliocene conditions in the western equatorial Pacific","docAbstract":"Mid-Pliocene low-latitude Pacific faunal (planktic foraminifer) sea surface temperature (SST) estimates are normally based upon the Modern Analog Technique (MAT). In the Eastern equatorial Pacific (EEP), where upwelling of cool water predominates, MAT can be used to discern both cooling and warming in Neogene records. SST today is ???30??C in the western equatorial Pacific (WEP) warm pool, the upper limit of the modern calibration data, and past warming above that level is difficult to assess using faunal methods. Mid-Pliocene fossil samples from the WEP have been analyzed using several variations of MAT with different outcomes and associated levels of confidence. While SST above ???30??C in the WEP during the mid-Pliocene cannot be ruled out due to the limitations of the method, temperatures this warm seem unlikely. In addition to the mid-Pliocene, planktic foraminifer assemblages from the coretop, last glacial maximum, last interglacial and the penultimate glacial (Marine Isotope Stage 6) show striking similarity to each other which suggests little to no change in the region between times of global climate extremes. There is generally good agreement between the Mg/Ca paleothermometer and MAT derived faunal SST estimates. Both suggest stability of the WEP warm pool.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Micropaleontology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"GeoScienceWorld","doi":"10.2113/gsmicropal.53.6.447","issn":"00262803","usgsCitation":"Dowsett, H., 2007, Faunal re-evaluation of Mid-Pliocene conditions in the western equatorial Pacific: Micropaleontology, v. 53, no. 6, p. 447-456, https://doi.org/10.2113/gsmicropal.53.6.447.","startPage":"447","endPage":"456","numberOfPages":"10","costCenters":[],"links":[{"id":239615,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":268484,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/gsmicropal.53.6.447"}],"volume":"53","issue":"6","noUsgsAuthors":false,"publicationDate":"2009-08-10","publicationStatus":"PW","scienceBaseUri":"505a0f2ce4b0c8380cd537e1","contributors":{"authors":[{"text":"Dowsett, H.","contributorId":44303,"corporation":false,"usgs":true,"family":"Dowsett","given":"H.","email":"","affiliations":[],"preferred":false,"id":431062,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70031322,"text":"70031322 - 2007 - Highstand fans in the California borderland: The overlooked deep-water depositional systems","interactions":[],"lastModifiedDate":"2023-07-26T12:01:19.203508","indexId":"70031322","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":"Highstand fans in the California borderland: The overlooked deep-water depositional systems","docAbstract":"Contrary to widely used sequence-stratigraphic models, lowstand fans are only part of the turbidite depositional record; our analysis reveals that a comparable volume of coarse-grained sediment has been deposited in California borderland deep-water basins regardless of sea level. Sedimentation rates and periods of active sediment transport have been determined for deep-water canyon-channel systems contributing to the southeastern Gulf of Santa Catalina and San Diego Trough since 40 ka using an extensive grid of high-resolution and deep-penetration seismic-reflection data. A regional seismic-reflection horizon (40 ka) has been correlated across the study area using radiocarbon age dates from the Mohole borehole and U.S. Geological Survey piston cores. This study focused on the submarine fans fed by the Oceanside, Carlsbad, and La Jolla Canyons, all of which head within the length of the Ocean-side littoral cell. The Oceanside Canyon–channel system was active from 45 to 13 ka, and the Carlsbad system was active from 50 (or earlier) to 10 ka. The La Jolla system was active over two periods, from 50 (or earlier) to 40 ka, and from 13 ka to the present. One or more of these canyon-channel systems have been active regardless of sea level. During sea-level fluctuation, shelf width between the canyon head and the littoral zone is the primary control on canyon-channel system activity. Highstand fan deposition occurs when a majority of the sediment within the Oceanside littoral cell is intercepted by one of the canyon heads, currently La Jolla Canyon. Since 40 ka, the sedimentation rate on the La Jolla highstand fan has been >2 times the combined rates on the Oceanside and Carlsbad lowstand fans.
Spillage and improper disposal of saline produced water from oil wells has caused environmental damage at thousands of sites in the United States. In order to improve understanding of the fate and transport of contaminants at these sites, the U.S. Geological Survey carried out multidisciplinary investigations at two oil production sites near Skiatook Lake, Oklahoma. As a part of this effort, the hydrology and subsurface transport of brine at OSPER site “A”, a tank battery and pit complex that was abandoned in 1973, was investigated. Based on data from 41 new boreholes that were cored and completed with monitoring wells, a large (∼200 m × 200 m × 20 m) plume of saline ground water was mapped. The main dissolved species are Na and Cl, with TDS in the plume ranging as high as 30,000 mg/L. Analysis of the high barometric efficiency of the wells indicated a confined aquifer response. Well-slug tests indicated the hydraulic conductivity is low (0.3–7.0 cm/day). Simplified flow and transport modeling supports the following conceptual model: (1) prior to the produced water releases, recharge was generally low (∼1 cm/a); (2) in ∼60 a of oil production enough saline produced water in pits leaked into the subsurface to create the plume; (3) following abandonment of the site in 1973 and filling of Skiatook Reservoir in the mid-1980s, recharge and lateral flow of water through the plume returned to low values; (4) as a result, spreading of the brine plume caused by mixing with fresh ground water recharge, as well as natural attenuation, are very slow.
Integrated, GIS-based, wetland predictive models were constructed to assist in predicting the responses of wetland plant communities to proposed new water-level regulation plans for Lake Ontario. The modeling exercise consisted of four major components: 1) building individual site wetland geometric models; 2) constructing generalized wetland geometric models representing specific types of wetlands (rectangle model for drowned river mouth wetlands, half ring model for open embayment wetlands, half ellipse model for protected embayment wetlands, and ellipse model for barrier beach wetlands); 3) assigning wetland plant profiles to the generalized wetland geometric models that identify associations between past flooding / dewatering events and the regulated water-level changes of a proposed water-level-regulation plan; and 4) predicting relevant proportions of wetland plant communities and the time durations during which they would be affected under proposed regulation plans. Based on this conceptual foundation, the predictive models were constructed using bathymetric and topographic wetland models and technical procedures operating on the platform of ArcGIS. An example of the model processes and outputs for the drowned river mouth wetland model using a test regulation plan illustrates the four components and, when compared against other test regulation plans, provided results that met ecological expectations. The model results were also compared to independent data collected by photointerpretation. Although data collections were not directly comparable, the predicted extent of meadow marsh in years in which photographs were taken was significantly correlated with extent of mapped meadow marsh in all but barrier beach wetlands. The predictive model for wetland plant communities provided valuable input into International Joint Commission deliberations on new regulation plans and was also incorporated into faunal predictive models used for that purpose.
","language":"English","publisher":"International Association for Great Lakes Research","doi":"10.3394/0380-1330(2007)33[751:PWPCRT]2.0.CO;2","issn":"03801330","usgsCitation":"Wilcox, D., and Xie, Y., 2007, Predicting wetland plant community responses to proposed water-level-regulation plans for Lake Ontario: GIS-based modeling: Journal of Great Lakes Research, v. 33, no. 4, p. 751-773, https://doi.org/10.3394/0380-1330(2007)33[751:PWPCRT]2.0.CO;2.","productDescription":"23 p.","startPage":"751","endPage":"773","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":477141,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://hdl.handle.net/20.500.12648/2290","text":"External Repository"},{"id":239951,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212461,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3394/0380-1330(2007)33[751:PWPCRT]2.0.CO;2"}],"volume":"33","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a81e1e4b0c8380cd7b7a3","contributors":{"authors":[{"text":"Wilcox, D.A.","contributorId":55382,"corporation":false,"usgs":true,"family":"Wilcox","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":430995,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Xie, Y.","contributorId":107917,"corporation":false,"usgs":true,"family":"Xie","given":"Y.","email":"","affiliations":[],"preferred":false,"id":430996,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031310,"text":"70031310 - 2007 - Cloud water in windward and leeward mountain forests: The stable isotope signature of orographic cloud water","interactions":[],"lastModifiedDate":"2018-04-03T17:17:35","indexId":"70031310","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Cloud water in windward and leeward mountain forests: The stable isotope signature of orographic cloud water","docAbstract":"Cloud water can be a significant hydrologic input to mountain forests. Because it is a precipitation source that is vulnerable to climate change, it is important to quantify amounts of cloud water input at watershed and regional scales. During this study, cloud water and rain samples were collected monthly for 2 years at sites on windward and leeward East Maui. The difference in isotopic composition between volume‐weighted average cloud water and rain samples was 1.4‰ δ18O and 12‰ δ2H for the windward site and 2.8‰ δ18O and 25‰ δ2H for the leeward site, with the cloud water samples enriched in 18O and 2H relative to the rain samples. A summary of previous literature shows that fog and/or cloud water is enriched in 18O and 2H compared to rain at many locations around the world; this study documents cloud water and rain isotopic composition resulting from weather patterns common to montane environments in the trade wind latitudes. An end‐member isotopic composition for cloud water was identified for each site and was used in an isotopic mixing model to estimate the proportion of precipitation input from orographic clouds. Orographic cloud water input was 37% of the total precipitation at the windward site and 46% at the leeward site. This represents an estimate of water input to the forest that could be altered by changes in cloud base altitude resulting from global climate change or deforestation.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2007WR006011","usgsCitation":"Scholl, M.A., Giambelluca, T., Gingerich, S.B., Nullet, M., and Loope, L., 2007, Cloud water in windward and leeward mountain forests: The stable isotope signature of orographic cloud water: Water Resources Research, v. 43, no. 12, Article W12411; 13 p., https://doi.org/10.1029/2007WR006011.","productDescription":"Article W12411; 13 p.","costCenters":[],"links":[{"id":477236,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2007wr006011","text":"Publisher Index Page"},{"id":239918,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"43","issue":"12","noUsgsAuthors":false,"publicationDate":"2007-12-20","publicationStatus":"PW","scienceBaseUri":"5059f676e4b0c8380cd4c79a","contributors":{"authors":[{"text":"Scholl, M. A.","contributorId":86365,"corporation":false,"usgs":true,"family":"Scholl","given":"M.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":430993,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Giambelluca, T. W.","contributorId":90115,"corporation":false,"usgs":false,"family":"Giambelluca","given":"T. W.","affiliations":[],"preferred":false,"id":430994,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gingerich, S. B.","contributorId":83958,"corporation":false,"usgs":true,"family":"Gingerich","given":"S.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":430992,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nullet, M.A.","contributorId":72596,"corporation":false,"usgs":true,"family":"Nullet","given":"M.A.","affiliations":[],"preferred":false,"id":430991,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Loope, L.L.","contributorId":43126,"corporation":false,"usgs":true,"family":"Loope","given":"L.L.","email":"","affiliations":[],"preferred":false,"id":430990,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70034629,"text":"70034629 - 2007 - Evaluating the accotink creek restoration project for improving water quality, in-stream habitat, and bank stability","interactions":[],"lastModifiedDate":"2012-03-12T17:21:41","indexId":"70034629","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Evaluating the accotink creek restoration project for improving water quality, in-stream habitat, and bank stability","docAbstract":"Increased urbanization results in a larger percentage of connected impervious areas and can contribute large quantities of stormwater runoff and significant quantities of debris and pollutants (e.g., litter, oils, microorganisms, sediments, nutrients, organic matter, and heavy metals) to receiving waters. To improve water quality in urban and suburban areas, watershed managers often incorporate best management practices (BMPs) to reduce the quantity of runoff as well as to minimize pollutants and other stressors contained in stormwater runoff. It is well known that land-use practices directly impact urban streams. Stream flows in urbanized watersheds increase in magnitude as a function of impervious area and can result in degradation of the natural stream channel morphology affecting the physical, chemical, and biological integrity of the stream. Stream bank erosion, which also increases with increased stream flows, can lead to bank instability, property loss, infrastructure damage, and increased sediment loading to the stream. Increased sediment loads may lead to water quality degradation downstream and have negative impacts on fish, benthic invertebrates, and other aquatic life. Accotink Creek is in the greater Chesapeake Bay and Potomac watersheds, which have strict sediment criteria. The USEPA (United States Environmental Protection Agency) and USGS (United States Geological Survey) are investigating the effectiveness of stream restoration techniques as a BMP to decrease sediment load and improve bank stability, biological integrity, and in-stream water quality in an impaired urban watershed in Fairfax, Virginia. This multi-year project continuously monitors turbidity, specific conductance, pH, and water temperature, as well as biological and chemical water quality parameters. In addition, physical parameters (e.g., pebble counts, longitudinal and cross sectional stream surveys) were measured to assess geomorphic changes associated with the restoration. Data from the pre-construction and initial post-construction phases are presented in this report. ?? 2007 ASCE.","largerWorkTitle":"Examining the Confluence of Environmental and Water Concerns - Proceedings of the World Environmental and Water Resources Congress 2006","conferenceTitle":"World Environmental and Water Resources Congress 2006: Examining the Confluence of Environmental and Water Concerns","conferenceDate":"21 May 2006 through 25 May 2006","conferenceLocation":"Omaha, NE","language":"English","doi":"10.1061/40856(200)402","isbn":"0784408564; 9780784408568","usgsCitation":"Struck, S., Selvakumar, A., Hyer, K., and O’Connor, T., 2007, Evaluating the accotink creek restoration project for improving water quality, in-stream habitat, and bank stability, in Examining the Confluence of Environmental and Water Concerns - Proceedings of the World Environmental and Water Resources Congress 2006, Omaha, NE, 21 May 2006 through 25 May 2006, https://doi.org/10.1061/40856(200)402.","costCenters":[],"links":[{"id":215659,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1061/40856(200)402"},{"id":243478,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationDate":"2012-04-26","publicationStatus":"PW","scienceBaseUri":"505a0bf6e4b0c8380cd5297d","contributors":{"authors":[{"text":"Struck, S.D.","contributorId":71786,"corporation":false,"usgs":true,"family":"Struck","given":"S.D.","email":"","affiliations":[],"preferred":false,"id":446758,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Selvakumar, A.","contributorId":84999,"corporation":false,"usgs":true,"family":"Selvakumar","given":"A.","email":"","affiliations":[],"preferred":false,"id":446759,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hyer, K.","contributorId":71023,"corporation":false,"usgs":true,"family":"Hyer","given":"K.","affiliations":[],"preferred":false,"id":446757,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"O’Connor, T.","contributorId":10630,"corporation":false,"usgs":true,"family":"O’Connor","given":"T.","email":"","affiliations":[],"preferred":false,"id":446756,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70031296,"text":"70031296 - 2007 - Chemistry of water collected from an unventilated drift, Yucca Mountain, Nevada","interactions":[],"lastModifiedDate":"2012-03-12T17:21:15","indexId":"70031296","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Chemistry of water collected from an unventilated drift, Yucca Mountain, Nevada","docAbstract":"Water samples (referred to as puddle water samples) were collected from the surfaces of a conveyor belt and plastic sheeting in the unventilated portion of the Enhanced Characterization of the Repository Block (ECRB) Cross Drift in 2003 and 2005 at Yucca Mountain, Nevada. The chemistry of these puddle water samples is very different than that of pore water samples from borehole cores in the same region of the Cross Drift or than seepage water samples collected from the Exploratory Studies Facility tunnel in 2005. The origin of the puddle water is condensation on surfaces of introduced materials and its chemistry is dominated by components of the introduced materials. Large CO2 concentrations may be indicative of localized chemical conditions induced by biologic activity. ?? 2007 Materials Research Society.","largerWorkTitle":"Materials Research Society Symposium Proceedings","conferenceTitle":"2006 MRS Fall Meeting","conferenceDate":"27 November 2006 through 1 December 2006","conferenceLocation":"Boston, MA","language":"English","issn":"02729172","isbn":"9781558999428","usgsCitation":"Marshall, B., Oliver, T., and Peterman, Z.E., 2007, Chemistry of water collected from an unventilated drift, Yucca Mountain, Nevada, in Materials Research Society Symposium Proceedings, v. 985, Boston, MA, 27 November 2006 through 1 December 2006, p. 511-518.","startPage":"511","endPage":"518","numberOfPages":"8","costCenters":[],"links":[{"id":239717,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"985","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f5afe4b0c8380cd4c374","contributors":{"authors":[{"text":"Marshall, B.D.","contributorId":19581,"corporation":false,"usgs":true,"family":"Marshall","given":"B.D.","email":"","affiliations":[],"preferred":false,"id":430934,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Oliver, T.A.","contributorId":95500,"corporation":false,"usgs":true,"family":"Oliver","given":"T.A.","email":"","affiliations":[],"preferred":false,"id":430936,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Peterman, Z. E.","contributorId":63781,"corporation":false,"usgs":true,"family":"Peterman","given":"Z.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":430935,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70031285,"text":"70031285 - 2007 - Stable isotope data from deep-water antipatharians: 400-Year records from the southeastern coast of the United States of America","interactions":[],"lastModifiedDate":"2015-12-10T11:50:25","indexId":"70031285","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1106,"text":"Bulletin of Marine Science","active":true,"publicationSubtype":{"id":10}},"title":"Stable isotope data from deep-water antipatharians: 400-Year records from the southeastern coast of the United States of America","docAbstract":"In this study, time-series stable isotope results (δ13C and δ15N) from three deep-water Leiopathes glaberrima(Esper, 1788) specimens Collected off the southeastern Coast of the United States of America and one specimen from the Gulf of Mexico are presented. The specimens were Collected live in 2004 and are estimated to be 200–500 yrs old based on 210Pb measurements and band Counts. The δ13C and δ15N long-term trends are reproducible within and among specimens from a similar location, suggesting a common environmental influence. Three western Atlantic specimens have average δ13C values of −15.7‰, −16.3‰, and −16.1‰, with the most depleted values from the oldest specimen. The oldest specimen records an enrichment in 13C of 0.5‰ corresponding to the Little Ice Age. All three specimens show a depletion of 13C over the past 150 yrs Corresponding to the δ13C Suess Effect. The fourth specimen from the Gulf of Mexico has an average δ13C value of −16.4‰ and shows no trend in13C value with time. All four specimens Contain an enrichment in 15N over the most recent 75 yrs, with the largest enrichment (3‰) in the Gulf of Mexico specimen. This enrichment is likely a result of increased terrestrial effluent (sewage and manure) reaching the offshore specimens.
","language":"English","publisher":"University of Miami - Rosenstiel School of Marine and Atmospheric Science","issn":"00074977","usgsCitation":"Williams, B., Risk, M.J., Ross, S.W., and Sulak, K., 2007, Stable isotope data from deep-water antipatharians: 400-Year records from the southeastern coast of the United States of America: Bulletin of Marine Science, v. 81, no. 3, p. 437-447.","productDescription":"11 p.","startPage":"437","endPage":"447","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":240125,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":312109,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://www.ingentaconnect.com/content/umrsmas/bullmar/2007/00000081/00000003/art00011"}],"volume":"81","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9674e4b08c986b31b4fa","contributors":{"authors":[{"text":"Williams, B.","contributorId":80786,"corporation":false,"usgs":true,"family":"Williams","given":"B.","affiliations":[],"preferred":false,"id":430896,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Risk, Michael J.","contributorId":9841,"corporation":false,"usgs":true,"family":"Risk","given":"Michael","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":430893,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ross, Steve W.","contributorId":72543,"corporation":false,"usgs":false,"family":"Ross","given":"Steve","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":430894,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Sulak, K. J. 0000-0002-4795-9310","orcid":"https://orcid.org/0000-0002-4795-9310","contributorId":76690,"corporation":false,"usgs":true,"family":"Sulak","given":"K. J.","affiliations":[],"preferred":false,"id":430895,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70031282,"text":"70031282 - 2007 - Supplemental water releases for fisheries restoration in a Brazilian floodplain River: A conceptual model","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70031282","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3301,"text":"River Research and Applications","active":true,"publicationSubtype":{"id":10}},"title":"Supplemental water releases for fisheries restoration in a Brazilian floodplain River: A conceptual model","docAbstract":"Highly productive floodplain rivers in Brazil and elsewhere provide livelihood and recreational fishing for millions of people around the world, but damming and controlled water discharge are a threat to these valuable ecosystems. Supplemental water releases (SWRs) at a dam are increasingly used for restoring fisheries productivity in many floodplain rivers. We proposed a conceptual model for a hypothetical water release to enhance fisheries using Tre??s Marias Reservoir (TMR) on the Sa??o Francisco River (SFR), Brazil. The information needed by the model follows: (i) Biologically, what is the best release date? (ii) How much water will be released? (iii) What is the pattern of impoundment and how much impounded water will be released? (iv) What is the lost revenue to the power plant associated with SWR? (v) What is the relationship between river discharge and the area of floodplain that is flooded? (vi) What is the relationship between SWR and fisheries value? Ichthyoplankton studies in the SFR showed a clear positive relationship between fish density and water level (WL). While the relationship between WL and floodplain area flooded and recruitment is not known, we concluded the best date for release is when there is a natural flood, which naturally triggers fish spawning and the SWR will add to the natural flood and cover a greater floodplain area. The released volume will range from 0.302km3 to 2.192 km3, depending on SWR duration. In most years from 1976 to 2003, TMR impounded enough water for SWR only in the second half of the fish-spawning season (January-March). Lost revenue at TMR depended on release volume and ranged from US$ 0.493 million to US$ 3.452 million for the actual power rate. However, SWR could increase commercial fisheries income an estimated US$ 4.468 million. We forecast that SWR can bring fisheries benefits that surpass the lost revenue.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"River Research and Applications","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/rra.1018","issn":"15351459","usgsCitation":"Godinho, A.L., Kynard, B., and Martinez, C., 2007, Supplemental water releases for fisheries restoration in a Brazilian floodplain River: A conceptual model: River Research and Applications, v. 23, no. 9, p. 947-962, https://doi.org/10.1002/rra.1018.","startPage":"947","endPage":"962","numberOfPages":"16","costCenters":[],"links":[{"id":212556,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/rra.1018"},{"id":240057,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"9","noUsgsAuthors":false,"publicationDate":"2007-07-12","publicationStatus":"PW","scienceBaseUri":"505b9f6fe4b08c986b31e598","contributors":{"authors":[{"text":"Godinho, Alexandre L.","contributorId":75324,"corporation":false,"usgs":true,"family":"Godinho","given":"Alexandre","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":430884,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kynard, B.","contributorId":51232,"corporation":false,"usgs":true,"family":"Kynard","given":"B.","email":"","affiliations":[],"preferred":false,"id":430883,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Martinez, C.B.","contributorId":28433,"corporation":false,"usgs":true,"family":"Martinez","given":"C.B.","email":"","affiliations":[],"preferred":false,"id":430882,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70031278,"text":"70031278 - 2007 - Forest legacies, climate change, altered disturbance regimes, invasive species and water","interactions":[],"lastModifiedDate":"2016-08-25T10:39:28","indexId":"70031278","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3666,"text":"Unasylva","printIssn":"0041-6436","active":true,"publicationSubtype":{"id":10}},"title":"Forest legacies, climate change, altered disturbance regimes, invasive species and water","docAbstract":"The factors that must be considered in seeking to predict changes in water availability has been examined. These factors are the following: forest legacies including logging, mining, agriculture, grazing, elimination of large carnivores, human-caused wildfire, and pollution; climate change and stream flow; altered disturbances such as frequency intensity and pattern of wildfires and insect outbreaks as well as flood control; lastly, invasive species like forest pests and pathogens. An integrated approach quantifying the current and past condition trends can be combined with spatial and temporal modeling to develop future change in forest structures and water supply. The key is a combination of geographic information system technologies with climate and land use scenarios, while preventing and minimizing the effects of harmful invasive species.
","language":"English","issn":"00416436","usgsCitation":"Stohlgren, T., Jarnevich, C., and Kumar, S., 2007, Forest legacies, climate change, altered disturbance regimes, invasive species and water: Unasylva, v. 58, no. 229, p. 44-49.","productDescription":"6 p.","startPage":"44","endPage":"49","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":240017,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"58","issue":"229","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1334e4b0c8380cd5456b","contributors":{"authors":[{"text":"Stohlgren, T.","contributorId":40766,"corporation":false,"usgs":true,"family":"Stohlgren","given":"T.","affiliations":[],"preferred":false,"id":430867,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jarnevich, C.","contributorId":68099,"corporation":false,"usgs":true,"family":"Jarnevich","given":"C.","affiliations":[],"preferred":false,"id":430868,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kumar, S.","contributorId":89843,"corporation":false,"usgs":true,"family":"Kumar","given":"S.","affiliations":[],"preferred":false,"id":430869,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70031277,"text":"70031277 - 2007 - Dissolved organic carbon in Alaskan boreal forest: Sources, chemical characteristics, and biodegradability","interactions":[],"lastModifiedDate":"2018-10-17T09:45:54","indexId":"70031277","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1478,"text":"Ecosystems","active":true,"publicationSubtype":{"id":10}},"title":"Dissolved organic carbon in Alaskan boreal forest: Sources, chemical characteristics, and biodegradability","docAbstract":"The fate of terrestrially-derived dissolved organic carbon (DOC) is important to carbon (C) cycling in both terrestrial and aquatic environments, and recent evidence suggests that climate warming is influencing DOC dynamics in northern ecosystems. To understand what determines the fate of terrestrial DOC, it is essential to quantify the chemical nature and potential biodegradability of this DOC. We examined DOC chemical characteristics and biodegradability collected from soil pore waters and dominant vegetation species in four boreal black spruce forest sites in Alaska spanning a range of hydrologic regimes and permafrost extents (Well Drained, Moderately Well Drained, Poorly Drained, and Thermokarst Wetlands). DOC chemistry was characterized using fractionation, UV-Vis absorbance, and fluorescence measurements. Potential biodegradability was assessed by incubating the samples and measuring CO2 production over 1 month. Soil pore water DOC from all sites was dominated by hydrophobic acids and was highly aromatic, whereas the chemical composition of vegetation leachate DOC varied significantly with species. There was no seasonal variability in soil pore water DOC chemical characteristics or biodegradability; however, DOC collected from the Poorly Drained site was significantly less biodegradable than DOC from the other three sites (6% loss vs. 13-15% loss). The biodegradability of vegetation-derived DOC ranged from 10 to 90% loss, and was strongly correlated with hydrophilic DOC content. Vegetation such as Sphagnum moss and feathermosses yielded DOC that was quickly metabolized and respired. In contrast, the DOC leached from vegetation such as black spruce was moderately recalcitrant. Changes in DOC chemical characteristics that occurred during microbial metabolism of DOC were quantified using fractionation and fluorescence. The chemical characteristics and biodegradability of DOC in soil pore waters were most similar to the moderately recalcitrant vegetation leachates, and to the microbially altered DOC from all vegetation leachates.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecosystems","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Springer","doi":"10.1007/s10021-007-9101-4","issn":"14329840","usgsCitation":"Wickland, K.P., Neff, J.C., and Aiken, G.R., 2007, Dissolved organic carbon in Alaskan boreal forest: Sources, chemical characteristics, and biodegradability: Ecosystems, v. 10, no. 8, p. 1323-1340, https://doi.org/10.1007/s10021-007-9101-4.","productDescription":"18 p.","startPage":"1323","endPage":"1340","numberOfPages":"18","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":239983,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212492,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10021-007-9101-4"}],"country":"United States","state":"Alaska","volume":"10","issue":"8","noUsgsAuthors":false,"publicationDate":"2007-11-13","publicationStatus":"PW","scienceBaseUri":"505a0239e4b0c8380cd4ff5b","contributors":{"authors":[{"text":"Wickland, Kimberly P. 0000-0002-6400-0590 kpwick@usgs.gov","orcid":"https://orcid.org/0000-0002-6400-0590","contributorId":1835,"corporation":false,"usgs":true,"family":"Wickland","given":"Kimberly","email":"kpwick@usgs.gov","middleInitial":"P.","affiliations":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":36183,"text":"Hydro-Ecological Interactions Branch","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":430864,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Neff, Jason C.","contributorId":34813,"corporation":false,"usgs":true,"family":"Neff","given":"Jason","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":430866,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Aiken, George R. 0000-0001-8454-0984 graiken@usgs.gov","orcid":"https://orcid.org/0000-0001-8454-0984","contributorId":1322,"corporation":false,"usgs":true,"family":"Aiken","given":"George","email":"graiken@usgs.gov","middleInitial":"R.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true}],"preferred":true,"id":430865,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70031276,"text":"70031276 - 2007 - Scale-dependent habitat selection of nesting Great Egrets and Snowy Egrets","interactions":[],"lastModifiedDate":"2012-03-12T17:21:12","indexId":"70031276","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3731,"text":"Waterbirds","onlineIssn":"19385390","printIssn":"15244695","active":true,"publicationSubtype":{"id":10}},"title":"Scale-dependent habitat selection of nesting Great Egrets and Snowy Egrets","docAbstract":"Foraging habitat selection of nesting Great Egrets (Ardea alba) and Snowy Egrets (Egretta thula) was investigated within an estuary with extensive impounded salt marsh habitat. Using a geographic information system, available habitat was partitioned into concentric bands at five, ten, and 15 km radius from nesting colonies to assess the relative effects of habitat composition and distance on habitat selection. Snowy Egrets were more likely than Great Egrets to depart colonies and travel to foraging sites in groups, but both species usually arrived at sites that were occupied by other wading birds. Mean flight distances were 6.2 km (SE = 0.4, N = 28, range 1.8-10.7 km) for Great Egrets and 4.7 km (SE = 0.48, N = 31, range 0.7-12.5 km) for Snowy Egrets. At the broadest spatial scale both species used impounded (mostly salt marsh) and estuarine edge habitat more than expected based on availability while avoiding unimpounded (mostly fresh water wetland) habitat. At more local scales habitat use matched availability. Interpretation of habitat preference differed with the types of habitat that were included and the maximum distance that habitat was considered available. These results illustrate that caution is needed when interpreting the results of habitat preference studies when individuals are constrained in their choice of habitats, such as for central place foragers.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Waterbirds","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1675/1524-4695(2007)030[0384:SHSONG]2.0.CO;2","issn":"15244695","usgsCitation":"Stolen, E.D., Collazo, J., and Percival, H., 2007, Scale-dependent habitat selection of nesting Great Egrets and Snowy Egrets: Waterbirds, v. 30, no. 3, p. 384-393, https://doi.org/10.1675/1524-4695(2007)030[0384:SHSONG]2.0.CO;2.","startPage":"384","endPage":"393","numberOfPages":"10","costCenters":[],"links":[{"id":239982,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212491,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1675/1524-4695(2007)030[0384:SHSONG]2.0.CO;2"}],"volume":"30","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b870ee4b08c986b3162a1","contributors":{"authors":[{"text":"Stolen, Eric D.","contributorId":28432,"corporation":false,"usgs":true,"family":"Stolen","given":"Eric","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":430861,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Collazo, J.A.","contributorId":35039,"corporation":false,"usgs":true,"family":"Collazo","given":"J.A.","affiliations":[],"preferred":false,"id":430863,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Percival, H.F.","contributorId":31716,"corporation":false,"usgs":true,"family":"Percival","given":"H.F.","email":"","affiliations":[],"preferred":false,"id":430862,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70031274,"text":"70031274 - 2007 - Modeling dune response using measured and equilibrium bathymetric profiles","interactions":[],"lastModifiedDate":"2014-08-22T15:00:16","indexId":"70031274","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Modeling dune response using measured and equilibrium bathymetric profiles","docAbstract":"Coastal engineers typically use numerical models such as SBEACH to predict coastal change due to extreme storms. SBEACH model inputs include pre-storm profiles, wave heights and periods, and water levels. This study focuses on the sensitivity of SBEACH to the details of pre-storm bathymetry. The SBEACH model is tested with two initial conditions for bathymetry, including (1) measured bathymetry from lidar, and (2) calculated equilibrium profiles. Results show that longshore variability in the predicted erosion signal is greater over measured bathymetric profiles, due to longshore variations in initial surf zone bathymetry. Additionally, patterns in predicted erosion can be partially explained by the configuration of the inner surf zone from the shoreline to the trough, with surf zone slope accounting for 67% of the variability in predicted erosion volumes.
","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes","conferenceLocation":"New Orleans, LA","language":"English","publisher":"American Society of Civil Engineers","doi":"10.1061/40926(239)69","isbn":"0784409269; 9780784409268","usgsCitation":"Fauver, L.A., Thompson, D.M., and Sallenger, A., 2007, Modeling dune response using measured and equilibrium bathymetric profiles, in Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes, New Orleans, LA, p. 897-910, https://doi.org/10.1061/40926(239)69.","productDescription":"14 p.","startPage":"897","endPage":"910","numberOfPages":"14","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":212459,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1061/40926(239)69"},{"id":239949,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationDate":"2012-04-26","publicationStatus":"PW","scienceBaseUri":"505a5bf2e4b0c8380cd6f909","contributors":{"authors":[{"text":"Fauver, Laura A.","contributorId":105384,"corporation":false,"usgs":true,"family":"Fauver","given":"Laura","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":430857,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Thompson, David M. 0000-0002-7103-5740 dthompson@usgs.gov","orcid":"https://orcid.org/0000-0002-7103-5740","contributorId":3502,"corporation":false,"usgs":true,"family":"Thompson","given":"David","email":"dthompson@usgs.gov","middleInitial":"M.","affiliations":[{"id":574,"text":"St. Petersburg Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":430855,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Sallenger, Asbury H. Jr.","contributorId":27458,"corporation":false,"usgs":true,"family":"Sallenger","given":"Asbury H.","suffix":"Jr.","affiliations":[],"preferred":false,"id":430856,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70031272,"text":"70031272 - 2007 - Forest dynamics in Oregon landscapes: Evaluation and application of an individual-based model","interactions":[],"lastModifiedDate":"2012-03-12T17:21:13","indexId":"70031272","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":"Forest dynamics in Oregon landscapes: Evaluation and application of an individual-based model","docAbstract":"The FORCLIM model of forest dynamics was tested against field survey data for its ability to simulate basal area and composition of old forests across broad climatic gradients in western Oregon, USA. The model was also tested for its ability to capture successional trends in ecoregions of the west Cascade Range. It was then applied to simulate present and future (1990-2050) forest landscape dynamics of a watershed in the west Cascades. Various regimes of climate change and harvesting in the watershed were considered in the landscape application. The model was able to capture much of the variation in forest basal area and composition in western Oregon even though temperature and precipitation were the only inputs that were varied among simulated sites. The measured decline in total basal area from tall coastal forests eastward to interior steppe was matched by simulations. Changes in simulated forest dominants also approximated those in the actual data. Simulated abundances of a few minor species did not match actual abundances, however. Subsequent projections of climate change and harvest effects in a west Cascades landscape indicated no change in forest dominance as of 2050. Yet, climate-driven shifts in the distributions of some species were projected. The simulation of both stand-replacing and partial-stand disturbances across western Oregon improved agreement between simulated and actual data. Simulations with fire as an agent of partial disturbance suggested that frequent fires of low severity can alter forest composition and structure as much or more than severe fires at historic frequencies. ?? 2007 by the Ecological Society of America.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ecological Applications","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1890/06-1838.1","issn":"10510761","usgsCitation":"Busing, R.T., Solomon, A., McKane, R., and Burdick, C., 2007, Forest dynamics in Oregon landscapes: Evaluation and application of an individual-based model: Ecological Applications, v. 17, no. 7, p. 1967-1981, https://doi.org/10.1890/06-1838.1.","startPage":"1967","endPage":"1981","numberOfPages":"15","costCenters":[],"links":[{"id":212428,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1890/06-1838.1"},{"id":239916,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1331e4b0c8380cd5455b","contributors":{"authors":[{"text":"Busing, R. T.","contributorId":72162,"corporation":false,"usgs":true,"family":"Busing","given":"R.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":430845,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Solomon, A.M.","contributorId":71721,"corporation":false,"usgs":true,"family":"Solomon","given":"A.M.","email":"","affiliations":[],"preferred":false,"id":430844,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McKane, R.B.","contributorId":88558,"corporation":false,"usgs":true,"family":"McKane","given":"R.B.","email":"","affiliations":[],"preferred":false,"id":430846,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Burdick, C.A.","contributorId":51984,"corporation":false,"usgs":true,"family":"Burdick","given":"C.A.","email":"","affiliations":[],"preferred":false,"id":430843,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70031264,"text":"70031264 - 2007 - Near-infrared spectral mapping of Titan's mountains and channels","interactions":[],"lastModifiedDate":"2018-12-07T15:25:15","indexId":"70031264","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2317,"text":"Journal of Geophysical Research E: Planets","active":true,"publicationSubtype":{"id":10}},"title":"Near-infrared spectral mapping of Titan's mountains and channels","docAbstract":"We investigate the spectral reflectance properties of channels and mountain ranges on Titan using data from Cassini's Visual and Infrared Mapping Spectrometer (VIMS) obtained during the T9 encounter (26 December 2005). We identify the location of channels and mountains using synthetic aperture radar maps obtained from Cassini's RADAR instrument during the T13 (30 April 2006) flyby. Channels are evident even in VIMS imaging with spatial resolution coarser than the channel size. The channels share spectral characteristics with Titan's dark blue terrain (e.g., the Huygens landing site) that is consistent with an enhancement in water ice content relative to the rest of Titan. We use this fact to measure widths of ???1 km for the largest channels. Comparison of the data sets shows that in our study area within the equatorial bright spectral unit east of Xanadu, mountains are darker and bluer than surrounding smooth terrain. These results are consistent with the equatorial bright terrain possessing a veneer of material that is thinner in the regions where there are mountains and streambeds that have likely undergone more recent and extensive erosion. We suggest a model for the geographic relationship of the dark blue, dark brown, and equatorial bright spectral units based on our findings.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research E: Planets","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"American Geophysical Union","publisherLocation":"Washington, D.C.","doi":"10.1029/2007JE002932","issn":"01480227","usgsCitation":"Barnes, J.W., Radebaugh, J., Brown, R.H., Wall, S., Soderblom, L.A., Lunine, J.I., Burr, D.M., Sotin, C., Le Mouelic, S., Rodriguez, S., Buratti, B.J., Clark, R.N., Baines, K.H., Jaumann, R., Nicholson, P.D., Kirk, R.L., Lopes, R., Lorenz, R.D., Mitchell, K., and Wood, C.A., 2007, Near-infrared spectral mapping of Titan's mountains and channels: Journal of Geophysical Research E: Planets, v. 112, no. E11, 13 p., https://doi.org/10.1029/2007JE002932.","productDescription":"13 p.","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":477229,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://u-paris.hal.science/hal-03657632","text":"External Repository"},{"id":239811,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212340,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2007JE002932"}],"otherGeospatial":"Titan","volume":"112","issue":"E11","noUsgsAuthors":false,"publicationDate":"2007-11-20","publicationStatus":"PW","scienceBaseUri":"505a63fde4b0c8380cd727e8","contributors":{"authors":[{"text":"Barnes, Jason 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age and depth distributions in the northwest Atlantic for the last 225,000 years","interactions":[],"lastModifiedDate":"2023-07-14T11:09:29.905124","indexId":"70031255","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1106,"text":"Bulletin of Marine Science","active":true,"publicationSubtype":{"id":10}},"title":"Deep-sea scleractinian coral age and depth distributions in the northwest Atlantic for the last 225,000 years","docAbstract":"Deep-sea corals have grown for over 200,000 yrs on the New England Seamounts in the northwest Atlantic, and this paper describes their distribution both with respect to depth and time. Many thousands of fossil scleractinian corals were collected on a series of cruises from 2003-2005; by contrast, live ones were scarce. On these seamounts, the depth distribution of fossil Desmophyllum dianthus (Esper, 1794) is markedly different to that of the colonial scleractinian corals, extending 750 m deeper in the water column to a distinct cut-off at 2500 m. This cut-off is likely to be controlled by the maximum depth of a notch-shaped feature in the seamount morphology. The ages of D. dianthus corals as determined by U-series measurements range from modern to older than 200,000 yrs. The age distribution is not constant over time, and most corals have ages from the last glacial period. Within the glacial period, increases in coral population density at Muir and Manning Seamounts coincided with times at which large-scale ocean circulation changes have been documented in the deep North Atlantic. Ocean circulation changes have an effect on coral distributions, but the cause of the link is not known. ?? 2007 Rosenstiel School of Marine and Atmospheric Science of the University of Miami.","language":"English","publisher":"University of Miami","issn":"00074977","usgsCitation":"Robinson, L., Adkins, J., Scheirer, D., Fernandez, D.P., Gagnon, A., and Waller, R., 2007, Deep-sea scleractinian coral age and depth distributions in the northwest Atlantic for the last 225,000 years: Bulletin of Marine Science, v. 81, no. 3, p. 371-391.","productDescription":"21 p.","startPage":"371","endPage":"391","numberOfPages":"21","costCenters":[],"links":[{"id":238622,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":418932,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://www.ingentaconnect.com/content/umrsmas/bullmar/2007/00000081/00000003/art00007"}],"volume":"81","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fe2fe4b0c8380cd4eb9c","contributors":{"authors":[{"text":"Robinson, L.F.","contributorId":75256,"corporation":false,"usgs":true,"family":"Robinson","given":"L.F.","email":"","affiliations":[],"preferred":false,"id":430754,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Adkins, J.F.","contributorId":90857,"corporation":false,"usgs":true,"family":"Adkins","given":"J.F.","email":"","affiliations":[],"preferred":false,"id":430755,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Scheirer, D.S.","contributorId":49165,"corporation":false,"usgs":true,"family":"Scheirer","given":"D.S.","email":"","affiliations":[],"preferred":false,"id":430752,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Fernandez, D. P.","contributorId":45108,"corporation":false,"usgs":false,"family":"Fernandez","given":"D.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":430751,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Gagnon, A.","contributorId":15004,"corporation":false,"usgs":true,"family":"Gagnon","given":"A.","email":"","affiliations":[],"preferred":false,"id":430750,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Waller, R.G.","contributorId":70591,"corporation":false,"usgs":true,"family":"Waller","given":"R.G.","email":"","affiliations":[],"preferred":false,"id":430753,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70031254,"text":"70031254 - 2007 - Selection of spawning sites by coho salmon in a northern California stream","interactions":[],"lastModifiedDate":"2012-03-12T17:21:19","indexId":"70031254","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2886,"text":"North American Journal of Fisheries Management","active":true,"publicationSubtype":{"id":10}},"title":"Selection of spawning sites by coho salmon in a northern California stream","docAbstract":"We assessed the relative importance of various factors contributing to spawning site use by a population of threatened coho salmon Oncorhynchus kisutch in Freshwater Creek, California, and created a predictive model of spawning habitat selection based on logistic regression analysis. We excluded sampling sites that previous studies had established as unsuitable on the basis of depth and substrate criteria and asked why fish chose particular locations and not others in seemingly suitable habitat. We evaluated surface water velocity, depth, substrate size composition, gravel inflow rates, vertical hydraulic gradient, geomorphic channel units, hyporheic water physicochemistry, cover, and proximity to other redds not in sampling sites during the 2004-2005 spawning season. In univariate comparisons with unused sites, coho salmon selected sites with a smaller median particle diameter, a larger percentage of gravel-pebble substrate, and higher gravel inflow rates. Based on multivariate logistic regression, the probability of a site's being used for spawning was best modeled as a positive function of the gravel-pebble fraction of the substrate, location at a pool or run tail, and the presence of existing redds in close proximity to the site. This model explained 38% of the variation in the data and was a better predictor of spawning habitat use than a more traditional model based on depth, velocity, and substrate. Our results highlight the potential importance of social behavior in contributing to habitat selection by spawning salmonids. ?? Copyright by the American Fisheries Society 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"North American Journal of Fisheries Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1577/M06-054.1","issn":"02755947","usgsCitation":"Mull, K., and Wilzbach, M., 2007, Selection of spawning sites by coho salmon in a northern California stream: North American Journal of Fisheries Management, v. 27, no. 4, p. 1343-1354, https://doi.org/10.1577/M06-054.1.","startPage":"1343","endPage":"1354","numberOfPages":"12","costCenters":[],"links":[{"id":238621,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211346,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/M06-054.1"}],"volume":"27","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-11-01","publicationStatus":"PW","scienceBaseUri":"505b8cd4e4b08c986b31815f","contributors":{"authors":[{"text":"Mull, K.E.","contributorId":68104,"corporation":false,"usgs":true,"family":"Mull","given":"K.E.","email":"","affiliations":[],"preferred":false,"id":430749,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wilzbach, M.A.","contributorId":48505,"corporation":false,"usgs":true,"family":"Wilzbach","given":"M.A.","affiliations":[],"preferred":false,"id":430748,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031253,"text":"70031253 - 2007 - Input, flux, and persistence of six select pesticides in San Francisco Bay","interactions":[],"lastModifiedDate":"2018-10-17T09:43:05","indexId":"70031253","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2040,"text":"International Journal of Environmental Analytical Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"Input, flux, and persistence of six select pesticides in San Francisco Bay","docAbstract":"Temporal patterns of pesticide inputs to San Francisco Bay were identified and correlated with timing of application and transport mechanism. Fluxes were calculated from measured concentrations and estimated flow. Persistence of the pesticides under typical riverine or estuarine conditions were estimated from laboratory experiments. Simazine was detected most frequently and had the highest flux into the Bay, which could be explained by its continuous use and long half-life. In comparison, diazinon was detected at lower concentrations and had a lower flux which corresponded to its lower use and shorter half-life. The order-of-magnitude lower fluxes of carbofuran and methidathion corresponded to their lower use and expected hydrolysis. Molinate was detected at the highest concentration but its flux was lower than expected, considering its very high use and persistence in the laboratory experiments. Additional loss of molinate is likely to occur from volatilization and photodegradation on the rice fields. Although thiobencarb had the second highest use, it had the lowest flux of the six pesticides, which can be attributed to its loss via hydrolysis, photodegradation, volatilization, and sorption to sediments. Fluxes into San Francisco Bay were equal to or greater than those reported for other estuaries, except for the Gulf of Mexico.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"International Journal of Environmental Analytical Chemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1080/03067310701619014","issn":"03067319","usgsCitation":"Kuivila, K., and Jennings, B., 2007, Input, flux, and persistence of six select pesticides in San Francisco Bay: International Journal of Environmental Analytical Chemistry, v. 87, no. 13-14, p. 897-911, https://doi.org/10.1080/03067310701619014.","productDescription":"15 p.","startPage":"897","endPage":"911","numberOfPages":"15","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":238620,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211345,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1080/03067310701619014"}],"country":"United States","state":"California","city":"San Francisco","otherGeospatial":"San Francisco Bay","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -122.64862060546875,\n 37.391981943533544\n ],\n [\n -121.74362182617188,\n 37.391981943533544\n ],\n [\n -121.74362182617188,\n 38.238180119798635\n ],\n [\n -122.64862060546875,\n 38.238180119798635\n ],\n [\n -122.64862060546875,\n 37.391981943533544\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"87","issue":"13-14","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3c10e4b0c8380cd62a40","contributors":{"authors":[{"text":"Kuivila, Kathryn 0000-0001-7940-489X kkuivila@usgs.gov","orcid":"https://orcid.org/0000-0001-7940-489X","contributorId":190790,"corporation":false,"usgs":true,"family":"Kuivila","given":"Kathryn","email":"kkuivila@usgs.gov","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":518,"text":"Oregon Water Science Center","active":true,"usgs":true}],"preferred":true,"id":430746,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jennings, B.E.","contributorId":44050,"corporation":false,"usgs":true,"family":"Jennings","given":"B.E.","email":"","affiliations":[],"preferred":false,"id":430747,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70031250,"text":"70031250 - 2007 - River plume patterns and dynamics within the Southern California Bight","interactions":[],"lastModifiedDate":"2023-07-14T10:57:18.022387","indexId":"70031250","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1333,"text":"Continental Shelf Research","active":true,"publicationSubtype":{"id":10}},"title":"River plume patterns and dynamics within the Southern California Bight","docAbstract":"Stormwater river plumes are important vectors of marine contaminants and pathogens in the Southern California Bight. Here we report the results of a multi-institution investigation of the river plumes across eight major river systems of southern California. We use in situ water samples from multi-day cruises in combination with MODIS satellite remote sensing, buoy meteorological observations, drifters, and HF radar current measurements to evaluate the dispersal patterns and dynamics of the freshwater plumes. River discharge was exceptionally episodic, and the majority of storm discharge occurred in a few hours. The combined plume observing techniques revealed that plumes commonly detach from the coast and turn to the left, which is the opposite direction of Coriolis influence. Although initial offshore velocity of the buoyant plumes was ∼50 cm/s and was influenced by river discharge inertia (i.e., the direct momentum of the river flux) and buoyancy, subsequent advection of the plumes was largely observed in an alongshore direction and dominated by local winds. Due to the multiple day upwelling wind conditions that commonly follow discharge events, plumes were observed to flow from their respective river mouths to down-coast waters at rates of 20–40 km/d. Lastly, we note that suspended-sediment concentration and beam-attenuation were poorly correlated with plume salinity across and within the sampled plumes (mean r2=0.12 and 0.25, respectively), while colored dissolved organic matter (CDOM) fluorescence was well correlated (mean r2=0.56), suggesting that CDOM may serve as a good tracer of the discharged freshwater in subsequent remote sensing and monitoring efforts of plumes.","language":"English","publisher":"Elsevier","doi":"10.1016/j.csr.2007.06.015","issn":"02784343","usgsCitation":"Warrick, J., DiGiacomo, P., Weisberg, S., Nezlin, N., Mengel, M., Jones, B., Ohlmann, J., Washburn, L., Terrill, E., and Farnsworth, K., 2007, River plume patterns and dynamics within the Southern California Bight: Continental Shelf Research, v. 27, no. 19, p. 2427-2448, https://doi.org/10.1016/j.csr.2007.06.015.","productDescription":"22 p.","startPage":"2427","endPage":"2448","numberOfPages":"22","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":238687,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","volume":"27","issue":"19","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aadb5e4b0c8380cd86f63","contributors":{"authors":[{"text":"Warrick, J.A.","contributorId":53503,"corporation":false,"usgs":true,"family":"Warrick","given":"J.A.","affiliations":[],"preferred":false,"id":430729,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"DiGiacomo, P.M.","contributorId":39501,"corporation":false,"usgs":true,"family":"DiGiacomo","given":"P.M.","affiliations":[],"preferred":false,"id":430727,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Weisberg, S.B.","contributorId":75755,"corporation":false,"usgs":true,"family":"Weisberg","given":"S.B.","email":"","affiliations":[],"preferred":false,"id":430730,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nezlin, N.P.","contributorId":77644,"corporation":false,"usgs":true,"family":"Nezlin","given":"N.P.","affiliations":[],"preferred":false,"id":430731,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Mengel, M.","contributorId":30581,"corporation":false,"usgs":true,"family":"Mengel","given":"M.","email":"","affiliations":[],"preferred":false,"id":430724,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Jones, B.H.","contributorId":96810,"corporation":false,"usgs":true,"family":"Jones","given":"B.H.","email":"","affiliations":[],"preferred":false,"id":430732,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Ohlmann, J.C.","contributorId":33524,"corporation":false,"usgs":true,"family":"Ohlmann","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":430725,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Washburn, L.","contributorId":99747,"corporation":false,"usgs":true,"family":"Washburn","given":"L.","email":"","affiliations":[],"preferred":false,"id":430733,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Terrill, E.J.","contributorId":49593,"corporation":false,"usgs":true,"family":"Terrill","given":"E.J.","affiliations":[],"preferred":false,"id":430728,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Farnsworth, K.L.","contributorId":36746,"corporation":false,"usgs":true,"family":"Farnsworth","given":"K.L.","email":"","affiliations":[],"preferred":false,"id":430726,"contributorType":{"id":1,"text":"Authors"},"rank":10}]}} ,{"id":70031249,"text":"70031249 - 2007 - An analysis of urban development and its environmental impact on the Tampa Bay watershed","interactions":[],"lastModifiedDate":"2017-04-12T15:59:17","indexId":"70031249","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2258,"text":"Journal of Environmental Management","active":true,"publicationSubtype":{"id":10}},"title":"An analysis of urban development and its environmental impact on the Tampa Bay watershed","docAbstract":"Urbanization has transformed natural landscapes into anthropogenic impervious surfaces. Urban land use has become a major driving force for land cover and land use change in the Tampa Bay watershed of west-central Florida. This study investigates urban land use change and its impact on the watershed. The spatial and temporal changes, as well as the development density of urban land use are determined by analyzing the impervious surface distribution using Landsat satellite imagery. Population distribution and density are extracted from the 2000 census data. Non-point source pollution parameters used for measuring water quality are analyzed for the sub-drainage basins of Hillsborough County. The relationships between 2002 urban land use, population distribution and their environmental influences are explored using regression analysis against various non-point source pollutant loadings in these sub-drainage basins. The results suggest that strong associations existed between most pollutant loadings and the extent of impervious surface within each sub-drainage basin in 2002. Population density also exhibits apparent correlations with loading rates of several pollutants. Spatial variations of selected non-point source pollutant loadings are also assessed.
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