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Page 2604, results 65076 - 65100

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Not all publications have extents, not all extents are completely accurate
A direct immunoassay for detecting diatoms in groundwater as an indicator of the direct influence of surface water
C. E. Walker, R. M. Schrock, T. J. Reilly, A. L. Baehr
2005, Journal of Applied Phycology (17) 81-90
Groundwater under the direct influence of surface water (GWUDISW) is of concern in communities where growing public demand on groundwater resources has resulted in increased withdrawals and hydraulic stress near surface water bodies. Under these conditions, contaminants such as methyl-tert butyl ether (MTBE) and biological materials have been detected in...
Biogeochemical controls on diel cycling of stable isotopes of dissolved 02 and dissolved inorganic carbon in the Big Hole River, Montana
Stephen R. Parker, Simon R. Poulson, Chris Gammons, Michael D. DeGrandpre
2005, Environmental Science & Technology (39) 7134-7140
Rivers with high biological productivity typically show substantial increases in pH and dissolved oxygen (DO) concentration during the day and decreases at night, in response to changes in the relative rates of aquatic photosynthesis and respiration. These changes, coupled with temperature variations, may impart diel (24-h) fluctuations in the concentration...
Estimation of inorganic species aquatic toxicity
James P. Hickey
Gary K. Ostrander, editor(s)
2005, Book chapter, Techniques in aquatic toxicology
The acute aquatic toxicities (narcoses) for a range of organism types may be estimated with LSER for a large number of inorganic and organometal species, many with an accuracy at or within an order of magnitude. Optimum estimations make use of a bioavailable metal fraction and a more accurate...
Protecting visitor health in beach waters of Lake Michigan: problems and opportunities
Meredith B. Nevers, Richard L. Whitman
T. Edsall, M. Munawar, editor(s)
2005, Book chapter, State of Lake Michigan: Ecology, Health, and Management
In this paper, we will review past research on Escherichia coli (E. Coli) and its relationship to recreational waters. Further, we will discuss current monitoring research and future prospects for improving monitoring efficiency to protect the health of beachgoers....
Role for Fe(III) minerals in nitrate-dependent microbial U(IV) oxidation
John M. Senko, Yasser Mohamed, Thomas A. Dewers, Lee R. Krumholz
2005, Environmental Science & Technology (39) 2529-2536
Microbiological reduction of soluble U(VI) to insoluble U(IV) is a means of preventing the migration of that element in groundwater, but the presence of nitrate in U(IV)-containing sediments leads to U(IV) oxidation and remobilizaton. Nitrite or iron(III) oxyhydroxides may oxidize U(IV) under nitrate-reducing conditions, and we determined the rate and...
Geochemical controls on microbial nitrate-dependent U(IV) oxidation
John M. Senko, Joseph M. Suflita, Lee R. Krumholz
2005, Geomicrobiology Journal (22) 371-378
After reductive immobilization of uranium, the element may be oxidized and remobilized in the presence of nitrate by the activity of dissimilatory nitrate-reducing bacteria. We examined controls on microbially mediated nitrate-dependent U(IV) oxidation in landfill leachate-impacted subsurface sediments. Nitrate-dependent U(IV)-oxidizing bacteria were at least two orders of magnitude less numerous...
Rocky Mountain Center for Conservation Genetics and Systematics
S.J. Oyler-McCance, T.W. Quinn
2005, Fact Sheet 2005-3138
The use of molecular genetic tools has become increasingly important in addressing conservation issues pertaining to plants and animals. Genetic information can be used to augment studies of population dynamics and population viability, investigate systematic, refine taxonomic definitions, investigate population structure and gene flow, and document genetic diversity in a...
Managing vegetation in surface-flow wastewater-treatment wetlands for optimal treatment performance
J.S. Thullen, J.J. Sartoris, S. M. Nelson
2005, Ecological Engineering (25) 583-593
Constructed wetlands that mimic natural marshes have been used as low-cost alternatives to conventional secondary or tertiary wastewater treatment in the U.S. for at least 30 years. However, the general level of understanding of internal treatment processes and their relation to vegetation and habitat quality has not grown in proportion...
Anesthesia and blood sampling of wild big brown bats (Eptesicus fuscus) with an assessment of impacts on survival
J. Wimsatt, T. J. O'Shea, L.E. Ellison, R.D. Pearce, V.R. Price
2005, Journal of Wildlife Diseases (41) 87-95
We anesthetized and blood sampled wild big brown bats (Eptesicus fuscus) in Fort Collins, Colorado (USA) in 2001 and 2002 and assessed effects on survival. Inhalant anesthesia was delivered into a specially designed restraint and inhalation capsule that minimized handling and bite exposures. Bats were immobilized an average of 9.1±5.1...
Evaluation of models and data for assessing whooping crane habitat in the central Platte River, Nebraska
Adrian H. Farmer, Brian S. Cade, James W. Terrell, Jim H. Henriksen, Jeffery T. Runge
2005, Scientific Investigations Report 2005-5123
The primary objectives of this evaluation were to improve the performance of the Whooping Crane Habitat Suitability model (C4R) used by the U.S. Fish and Wildlife Service (Service) for defining the relationship between river discharge and habitat availability, and to assist the Service in implementing improved model(s) with existing hydraulic...
Attitudinal survey component of the study Quantity, quality, and support for research in the U.S. Fish and Wildlife Service: An organizational assessment: Report of methods and frequencies
Jennifer R. Neilson, Berton Lee Lamb, Earlene M. Swann, Joan Ratz, Phadrea D. Ponds, Joyce Liverca
2005, Open-File Report 2005-1449
The U.S. Fish and Wildlife Service (FWS) is responsible for managing the Nation’s fish and wildlife resources so that these trust resources are preserved for the present and future use and enjoyment of the citizens of the United States. The FWS achieves this mission by managing many programs. These include...
Cottonwood in the Missouri Breaks National Monument
Gregor T. Auble, Michael L. Scott, Joseph Frazier, Chad Krause, Michael F. Merigliano
2005, Fact Sheet 2005-3132
Concerns about cottonwood along the Wild and Scenic reach of the upper Missouri River include declining forests of sparse old trees with little recruitment of new individuals, impacts of cattle crazing and recreational use, and effects of flow alterations from operation of upstream dams and changes in tributary inflows....
Public acceptance of management actions and judgments of responsibility for the wolves of the southern Greater Yellowstone Area: Report to Grand Teton National Park
Jonathan G. Taylor, S. Shea Johnson, Lori B. Shelby
2005, Open-File Report 2005-1408
Introduction Wolves of Grand Teton National Park and the Greater Yellowstone Area Gray wolves (Canis lupus) appeared in Grand Teton National Park (GRTE) in October of 1998, two years after being reintroduced to Yellowstone National Park (YNP). Since that time, five packs have been within the GRTE borders - Gros...