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Year Published: 2008

Rivers and streams: Ecosystem dynamics and integrating paradigms

Full understanding of running waters requires an ecosystem perspective, which encompasses the physical and chemical setting in interaction with dependent biological communities. Several conceptual models or paradigms of river and stream ecosystems that capture critical components of lotic ecosystems have been developed, including the ‘river...

Cummins, K.W.; Wilzbach, M.A.

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Year Published: 2008

The desperate dozen: Fishes on the brink

IT IS NO SECRET THAT OUR NATIVE AQUATIC ANIMALS ARE IN DECLINE. There are currently 582 species of animals on the Federal list of endangered and threatened species, 268 of these (46%) are found in freshwater habitats. Of the amazing assemblage of 675 fishes found in southeastern waters, more than a quarter are considered imperiled. While all of...

Welsh, Stuart A.

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Year Published: 2007

Evaluating robustness in rank-based risk assessments of freshwater ecosystems

Conservation planning aims to protect biodiversity by sustainng the natural physical, chemical, and biological processes within representative ecosystems. Often data to measure these components are inadequate or unavailable. The impact of human activities on ecosystem processes complicates integrity assessments and might alter ecosystem...

Mattson, K.M.; Angermeier, Paul

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Year Published: 2007

Assessing the concentration, speciation, and toxicity of dissolved metals during mixing of acid-mine drainage and ambient river water downstream of the Elizabeth Copper Mine, Vermont, USA

The authors determine the composition of a river that is impacted by acid-mine drainage, evaluate dominant physical and geochemical processes controlling the composition, and assess dissolved metal speciation and toxicity using a combination of laboratory, field and modeling studies. Values of pH increase from 3.3 to 7.6 and the sum of dissolved...

Balistrieri, Laurie S.; Seal, R.R.; Piatak, N.M.; Paul, B.

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Year Published: 2006

Ecosystem element cycling

El-Shaarawi, Abdel H.; Piegorsch, Walter W.; McGuire, A. David
Ecosystem element cycling; 2006; Book chapter; Book; Encyclopedia of Environmetrics; McGuire, A. David

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Year Published: 2006

Correlated growth and survival of juvenile spectacled eiders: Evidence of habitat limitation?

We studied the growth and survival of Spectacled Eider (Somateria fischeri) ducklings to 30 days of age along the lower Kashunuk River on the Yukon-Kuskokwim Delta from 1995 to 2000. We replicated this study at a second site, Kigigak Island, in 1999 and 2000. Age-adjusted estimates of duckling mass and survival at 30 days posthatching were highly...

Flint, Paul L.; Morse, Julie A.; Grand, James B.; Moran, Christine L.
Correlated growth and survival of juvenile spectacled eiders: Evidence of habitat limitation?; 2006; Article; Journal; Condor; Flint, P. L.; Morse, J. A.; Grand, J. B.; Moran, C. L.

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Year Published: 2006

Modeling spatial and temporal variations in temperature and salinity during stratification and overturn in Dexter Pit Lake, Tuscarora, Nevada, USA

This paper examines the seasonal cycling of temperature and salinity in Dexter pit lake in arid northern Nevada, and describes an approach for modeling the physical processes that operate in such systems. The pit lake contains about 596,200 m3 of dilute, near neutral (pHs 6.7–9) water. Profiles of temperature, conductivity, and selected...

Balistrieri, Laurie S.; Tempel, R.N.; Stillings, L.L.; Shevenell, L.A.

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Year Published: 2005

p,p'-DDE depresses the immune competence of chinook salmon (Oncorhynchus tshawytscha) leukocytes

p,p′-DDE, the main metabolite of DDT, is still detected in aquatic environments throughout the world. Here, the effects and mechanisms by which p,p′-DDE exposure might affect the immune system of chinook salmon (Oncorhynchus tshawytscha) was studied. Isolated salmon splenic and pronephric leukocytes were incubated with different...

Misumi, Ichiro; Vella, Anthony T.; Leong, Jo-Ann C.; Nakanishi, Teruyuki; Schreck, Carl B.

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Year Published: 2004

An annotated bibliography of selected guides for stream habitat improvement in the Pacific Northwest

This annotated bibliography is a response to widespread interest in stream habitat improvement in the Pacific Northwest by land managers, governmental and nongovernmental organizations, and the lay public. Several guides to stream habitat improvement have been written in the past, but may not be easily accessible to people from diverse backgrounds...

Keim, R.F.; Price, A.B.; Hardin, T. S.; Skaugset, Arne E.; Bateman, D.S.; Gresswell, R.E.; Tesch, S. D.

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Year Published: 2003

Comparing visual prey detection among species of piscivorous salmonids: effects of light and low turbidities

Differences in reaction distance to prey fish by piscivorous salmonids can alter predator–prey interactions under different visual conditions. We compared reaction distances of three piscivorous salmonids commonly found in western lakes: cutthroat trout, Oncorhynchus clarki utah, rainbow trout, O. mykiss, and the nonnative lake char, Salvelinus...

Mazur, Michael M.; Beauchamp, David A.
Comparing visual prey detection among species of piscivorous salmonids: effects of light and low turbidities; 2003; Article; Journal; Environmental Biology of Fishes; Mazur, Michael M.; Beauchamp, David A.

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Year Published: 2002

Does food availability affect energy expenditure rates of nesting seabirds? A supplemental-feeding experiment with Black-Legged Kittiwakes (Rissa tridactyla)

We used a supplemental-feeding experiment, the doubly labeled water technique, and a model-selection approach based upon the Akaike Information Criterion to examine effects of food availability on energy expenditure rates of Black-legged Kittiwakes (Rissa tridactyla) raising young. Energy expenditure rates of supplementally fed females (n = 14)...

Jodice, Patrick G.R.; Roby, Daniel D.; Hatch, Scott A.; Gill, Verena A.; Lanctot, Richard B.; Visser, G. Henk

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Year Published: 2002

Feeding habits of the endangered Ozark big-eared bat (Corynorhinus townsendii ingens) relative to prey abundance

Feeding habits of the endangered Ozark big-cared bat (Corynorhinus townsendii ingens) in eastern Oklahoma, USA, were studied from July 1987 through July 1988. Diets were determined from microscopic analysis of fecal pellets and compared with arthropods collected in Malaise traps. Although lepidopterans comprised only 21.5% of the available prey,...

Leslie,, David M.; Clark, B.S.
Feeding habits of the endangered Ozark big-eared bat (Corynorhinus townsendii ingens) relative to prey abundance; 2002; Article; Journal; Acta Chiropterologica; Leslie, David, M. , D. M.; Clark, B. S.