The aquatic turtle assemblage inhabiting a highly altered landscape in southeast Missouri
Brad M. Glorioso, Allison J. Vaughn, J. Hardin Waddle
2010, Journal of Fish and Wildlife Management (1) 161-168
Turtles are linked to energetic food webs as both consumers of plants and animals and prey for many species. Turtle biomass in freshwater systems can be an order of magnitude greater than that of endotherms. Therefore, declines in freshwater turtle populations can change energy transfer in freshwater systems. Here we...
Volcano monitoring using GPS: Developing data analysis strategies based on the June 2007 Kīlauea Volcano intrusion and eruption
Kristine M. Larson, Michael Poland, Asta Miklius
2010, Journal of Geophysical Research B: Solid Earth (115) B07406
The global positioning system (GPS) is one of the most common techniques, and the current state of the art, used to monitor volcano deformation. In addition to slow (several centimeters per year) displacement rates, GPS can be used to study eruptions and intrusions that result in much larger (tens of...
Ground surface deformation patterns, magma supply, and magma storage at Okmok volcano, Alaska, from InSAR analysis: 2. Coeruptive deflation, July-August 2008
Zhong Lu, Daniel Dzurisin
2010, Journal of Geophysical Research B: Solid Earth (115)
A hydrovolcanic eruption near Cone D on the floor of Okmok caldera, Alaska, began on 12 July 2008 and continued until late August 2008. The eruption was preceded by inflation of a magma reservoir located beneath the center of the caldera and ∼3 km below sea level (bsl), which began...
Field evaluation of a two-dimensinal hydrodynamic model near boulders for habitat calculation
Terry Waddle
2010, River Research and Applications (26) 730-741
Two-dimensional hydrodynamic models are now widely used in aquatic habitat studies. To test the sensitivity of calculated habitat outcomes to limitations of such a model and of typical field data, bathymetry, depth and velocity data were collected for three discharges in the vicinity of two large boulders in the South...
Analysis of nonvolcanic tremor on the San Andreas Fault near Parkfield, CA using U.S. Geological Survey Parkfield Seismic Array
Jon B. Fletcher, Lawrence M. Baker
2010, Journal of Geophysical Research B: Solid Earth (115)
Reports by Nadeau and Dolenc (2005) that tremor had been detected near Cholame Valley spawned an effort to use UPSAR (U. S. Geological Survey Parkfield Seismic Array) to study characteristics of tremor. UPSAR was modified to record three channels of velocity at 40–50 sps continuously in January 2005 and ran...
Anisotropy, repeating earthquakes, and seismicity associated with the 2008 eruption of Okmok Volcano, Alaska
Jessica H. Johnson, Stephanie Prejean, Martha K. Savage, John Townend
2010, Journal of Geophysical Research (115)
We use shear wave splitting (SWS) analysis and double-difference relocation to examine temporal variations in seismic properties prior to and accompanying magmatic activity associated with the 2008 eruption of Okmok volcano, Alaska. Using bispectrum cross-correlation, a multiplet of 25 earthquakes is identified spanning five years leading up to the eruption,...
Decline of shortjaw cisco in Lake Superior: the role of overfishing and risk of extinction
Charles R. Bronte, Michael H. Hoff, Owen T. Gorman, Wayne E. Thogmartin, Philip J. Schneeberger, Thomas N. Todd
2010, Transactions of the American Fisheries Society (139) 735-748
Recent reviews have further documented the decline of the shortjaw cisco Coregonus zenithicus in Lake Superior. This fish was the most abundant deepwater cisco species in Lake Superior in the early 1920s but presently makes up less than 1% of all deepwater ciscoes (i.e., including shortjaw cisco, bloater C. hoyi,...
Time-averaged paleomagnetic field at the equator: Complete data and results from the Galapagos Islands, Ecuador
Sherman Gromme, Edward A. Mankinen, Michel Prevot
2010, Geochemistry, Geophysics, Geosystems (11)
We present here the complete paleomagnetic laboratory results from a collection of approximately 1500 oriented cores from all 16 of the Galapagos Islands, Ecuador, collected by Allan Cox in 1964–1965 but nearly all previously unpublished. The islands are located in the eastern Pacific Ocean within 1.4° of latitude from the...
Vegetation monitoring for Guatemala: a comparison between simulated VIIRS and MODIS satellite data
Vijendra K. Boken, Gregory L. Easson, James Rowland
2010, Geocarto International (25) 617-627
The advanced very high resolution radiometer (AVHRR) and moderate resolution imaging spectroradiometer (MODIS) data are being widely used for vegetation monitoring across the globe. However, sensors will discontinue collecting these data in the near future. National Aeronautics and Space Administration is planning to launch a new sensor, visible infrared imaging...
Coherence of Mach fronts during heterogeneous supershear earthquake rupture propagation: Simulations and comparison with observations
A. Bizzarri, Eric M. Dunham, P. Spudich
2010, Journal of Geophysical Research B: Solid Earth (115) B08301
We study how heterogeneous rupture propagation affects the coherence of shear and Rayleigh Mach wavefronts radiated by supershear earthquakes. We address this question using numerical simulations of ruptures on a planar, vertical strike-slip fault embedded in a three-dimensional, homogeneous, linear elastic half-space. Ruptures propagate spontaneously in accordance with a linear...
The bioeconomic impact of different management regulations on the Chesapeake Bay blue crab fishery
David B. Bunnell, Douglas W. Lipton, Thomas J. Miller
2010, North American Journal of Fisheries Management (30) 1505-1521
The harvest of blue crabs Callinectes sapidus in Chesapeake Bay declined 46% between 1993 and 2001 and remained low through 2008. Because the total market value of this fishery has declined by an average of US $ 3.3 million per year since 1993, the commercial fishery has been challenged to...
The North American upper mantle: Density, composition, and evolution
Walter D. Mooney, Mikhail K. Kaban
2010, Journal of Geophysical Research B: Solid Earth (115)
The upper mantle of North America has been well studied using various seismic methods. Here we investigate the density structure of the North American (NA) upper mantle based on the integrative use of the gravity field and seismic data. The basis of our study is the removal of the gravitational...
Comparison of sap flux, moisture flux tower and MODIS enhanced vegetation index methods for estimating riparian evapotranspiration
Pamela L. Nagler, Edward P. Glenn, Kiyomi Morino
Christopher M.U Neale, Michael H. Cosh, editor(s)
2010, Conference Paper, Remote sensing and hydrology
Riparian evapotranspiration (ET) was measured on a salt cedar (Tamarix spp.) dominated river terrace on the Lower Colorado River from 2007 to 2009 using tissue-heat-balance sap flux sensors at six sites representing very dense, medium dense, and sparse stands of plants. Salt cedar ET varied markedly across sites, and sap...
The 2003-2008 summary of the North American Breeding Bird Survey
David J. Ziolkowski Jr., Keith L. Pardieck, John R. Sauer
2010, Bird Populations (10) 90-109
Data from the North American Breeding Bird Survey were used to estimate continental and regional changes in bird populations for the 6-yr period 2003-2008 and the 2-yr period 2007-2008. These short-term changes were placed in the context of population trends estimated over the 1966-2008 interval. Across the entire survey area,...
A role for analytical chemistry in advancing our understanding of the occurrence, fate, and effects of Corexit Oil Dispersants
Ben Place, Brian Anderson, Abdou Mekebri, Edward T. Furlong, James L. Gray, Ron Tjeerdema, Jennifer Field
2010, Environmental Science & Technology (44) 6016-6018
On April 24, 2010, the sinking of the Deepwater Horizon oil rig resulted in the release of oil into the Gulf of Mexico. As of July 19, 2010, the federal government's Deepwater Horizon Incident Joint Information Center estimates the cumulative range of oil released is 3,067,000 to 5,258,000 barrels, with...
Spatially explicit inference for open populations: Estimating demographic parameters from camera-trap studies
Beth Gardner, Juan Reppucci, Mauro Lucherini, J. Andrew Royle
2010, Ecology (91) 3376-3383
We develop a hierarchical capture–recapture model for demographically open populations when auxiliary spatial information about location of capture is obtained. Such spatial capture–recapture data arise from studies based on camera trapping, DNA sampling, and other situations in which a spatial array of devices records encounters of unique individuals. We integrate...
Mineral Commodity Summaries 2010
Water Resources Division, U.S. Geological Survey
2010, Mineral Commodity Summaries 2010
Each chapter of the 2010 edition of the U.S. Geological Survey (USGS) Mineral Commodity Summaries (MCS) includes information on events, trends, and issues for each mineral commodity as well as discussions and tabular presentations on domestic industry structure, Government programs, tariffs, 5-year salient statistics, and world production and resources. The...
Scale-dependent associations of Band-tailed Pigeon counts at mineral sites
Cory T. Overton, Michael L. Casazza, Peter S. Coates
2010, Northwestern Naturalist (91) 299-308
The abundance of Band-tailed Pigeons (Patagioenas fasciata monilis) has declined substantially from historic numbers along the Pacific Coast. Identification of patterns and causative factors of this decline are hampered because habitat use data are limited, and temporal and spatial variability patterns associated with population indices are not known. Furthermore, counts...
Geomorphology and depositional subenvironments of Gulf Islands National Seashore, Perdido Key and Santa Rosa Island, Florida
Robert A. Morton, Marilyn C. Montgomery
2010, Open-File Report 2010-1330
The U.S. Geological Survey (USGS) is studying coastal hazards and coastal change to improve our understanding of coastal ecosystems and to develop better capabilities of predicting future coastal change. One approach to understanding the dynamics of coastal systems is to monitor changes in barrier-island subenvironments through time. This involves examining...
Analysis and simulation of water-level, specific conductance, and total phosphorus dynamics of the Loxahatchee National Wildlife Refuge, Florida, 1995-2006
Paul Conrads, Edwin A. Roehl Jr.
2010, Scientific Investigations Report 2010-5244
The Arthur R. Marshall Loxahatchee Wildlife Refuge (Refuge) was established in 1951 through a license agreement between the South Florida Water Management District and the U.S. Fish and Wildlife Service (USFWS) as part of the Migratory Bird Conservation Act. Under the license agreement, the State of Florida owns the land...
Groundwater conditions and studies in the Brunswick–Glynn County area, Georgia, 2008
Gregory S. Cherry, Michael F. Peck, Jaime A. Painter, Welby L. Stayton
2010, Open-File Report 2009-1275
The Upper Floridan aquifer is contaminated with saltwater in a 2-square-mile area of downtown Brunswick, Georgia. This contamination has limited development of the groundwater supply in the Glynn County area. Hydrologic, geologic, and water-quality data are needed to effectively manage water resources. Since 1959, the U.S. Geological Survey has conducted...
Occurrence and distribution of organic chemicals and nutrients and comparison of water-quality data from public drinking-water supplies in the Columbia aquifer in Delaware, 2000-08
Betzaida Reyes
2010, Scientific Investigations Report 2010-5206
The U.S. Geological Survey, in cooperation with the Delaware Department of Natural Resources and Environmental Control and the Delaware Geological Survey, conducted a groundwater-quality investigation to (a) describe the occurrence and distribution of selected contaminants, and (b) document any changes in groundwater quality in the Columbia aquifer public water-supply wells...
Contamination movement around a permeable reactive barrier at Solid Waste Management Unit 12, Naval Weapons Station Charleston, North Charleston, South Carolina, 2009
Don A. Vroblesky, Matthew D. Petkewich, Kevin J. Conlon
2010, Scientific Investigations Report 2010-5086
The U.S. Geological Survey and the Naval Facilities Engineering Command Southeast investigated natural and engineered remediation of chlorinated volatile organic compound groundwater contamination at Solid Waste Management Unit 12 at the Naval Weapons Station Charleston, North Charleston, South Carolina, beginning in 2000. In early 2004, groundwater contaminants began moving around...
Aquatic assessment of the Ely Copper Mine Superfund site, Vershire, Vermont
Robert R. Seal II, Richard G. Kiah, Nadine M. Piatak, John M. Besser, James F. Coles, Jane M. Hammarstrom, Denise M. Argue, Denise M. Levitan, Jeffrey R. Deacon, Christopher G. Ingersoll
2010, Scientific Investigations Report 2010-5084
The Ely Mine, which operated from 1821 to 1905, and its area of downstream impact constitute the Ely Copper Mine Superfund site. The site was placed on the National Priorities List in 2001. The mine comprises underground workings, foundations from historical structures, several waste-rock piles, roast beds associated with the...
Surface-water quality-assurance plan for the USGS Georgia Water Science Center, 2010
Anthony J. Gotvald
2010, Open-File Report 2010-1263
The U.S. Geological Survey requires that each Water Science Center prepare a surface-water quality-assurance plan to describe policies and procedures that ensure high quality surface-water data collection, processing, analysis, computer storage, and publication. The Georgia Water Science Center's standards, policies, and procedures for activities related to the collection, processing, analysis,...
