Publications
Filter Total Items: 2088
Factors influencing the distribution and abundance of diaptomid copepods in high elevation lakes in the Pacific Northwest, USA Factors influencing the distribution and abundance of diaptomid copepods in high elevation lakes in the Pacific Northwest, USA
We investigated the impact of abiotic factors and trout density on distribution and abundance of diaptomid copepods in high-elevation lakes in North Cascades National Park Service Complex (NOCA), Washington, USA. The most common large diaptomid, D. kenai (mean length = 1.88 mm), was able to persist over a wide range of abiotic factors, but the small herbivorous diaptomid, D. tyrrelli...
Authors
W.J. Liss, Gary L. Larson, E. Deimling, L. Ganio, Robert L. Hoffman, G.A. Lomnicky
Mitigation of habitat "take" and the core area concept Mitigation of habitat "take" and the core area concept
No abstract available.
Authors
J. Buchanan, R.J. Fredrickson, D.E. Seaman
Winter range expansion by the northern Yellowstone elk herd Winter range expansion by the northern Yellowstone elk herd
Your next big-game bag may be a record breaker -- so check it against the 21 weight charts given by these expert technicians.
Authors
Thomas O. Lemke, J.A. Mack
Organochlorine pesticides, PCBs, and mercury in hawk, falcon, eagle, and owl eggs from the Lipetsk, Voronezh, Novgorod and Saratov regions, Russia, 1992-1993 Organochlorine pesticides, PCBs, and mercury in hawk, falcon, eagle, and owl eggs from the Lipetsk, Voronezh, Novgorod and Saratov regions, Russia, 1992-1993
Fifty-two eggs (one per nest) of 12 species of raptors were collected in 1992-93 for contaminant analysis in three southern European locations in Russia. One Peregrine Falcon (Falco peregrinus) egg was also collected farther northwest in the Novgorod region. A high DDE concentration (27.3 ppm, wet weight [w/w]) in the Peregrine Falcon egg raised concern for the species in European Russia...
Authors
Charles J. Henny, S.A. Ganusevich, F.P. Ward, T.R. Schwartz, A.L. Mischenko, V.N. Moseikin, V.S. Sarychev
Spatial patterns of tropospheric ozone in the Mount Rainier region of the Cascade Mountains, USA Spatial patterns of tropospheric ozone in the Mount Rainier region of the Cascade Mountains, USA
Few data exist on tropospheric ozone concentrations in rural and wildland areas of western Washington, U.S.A. We measured tropospheric ozone in Mount Rainier National Park and the Puget Sound region of Washington using electronic analyzers and passive samplers during the summers of 1994 and 1995. Electronic analyzers recorded hourly ozone concentrations from five locations between...
Authors
S. Brace, D. L. Peterson
Avian movements and wetland connectivity in landscape conservation Avian movements and wetland connectivity in landscape conservation
The current conservation crisis calls for research and management to be carried out on a long-term, multi-species basis at large spatial scales. Unfortunately, scientists, managers, and agencies often are stymied in their effort to conduct these large-scale studies because of a lack of appropriate technology, methodology, and funding. This issue is of particular concern in wetland...
Authors
Susan M. Haig, D.W. Mehlman, L.W. Oring
Postfledging nest dependence period for bald eagles in Florida Postfledging nest dependence period for bald eagles in Florida
We studied the postfledging dependency period in bald eagles (Haliaeetus leucocephalus), a little studied but important period in the life cycle of avian species. Bald eagles in Florida had a postfledging dependency period of 4-11 weeks (15-22 weeks old). The length of the dependency period did not vary by year of study, sex, number of fledgings, timing of fledging, or hatch order (P > 0...
Authors
Petra B. Wood, Michael W. Collopy, Carolyn M. Sekerak
Relationships among environmental variables and distribution of tree species at high elevation in the Olympic Mountains Relationships among environmental variables and distribution of tree species at high elevation in the Olympic Mountains
Relationships among environmental variables and occurrence of tree species were investigated at Hurricane Ridge in Olympic National Park, Washington, USA. A transect consisting of three plots was established down one north-and one south-facing slope in stands representing the typical elevational sequence of tree species. Tree species included subalpine fir (Abies lasiocarpa), Douglas-fir
Authors
Andrea Woodward
Routes and travel rates of migrating Peregrine Falcons Falco peregrinus and Swainson's Hawks Buteo swainsoni in the Western Hemisphere Routes and travel rates of migrating Peregrine Falcons Falco peregrinus and Swainson's Hawks Buteo swainsoni in the Western Hemisphere
We describe and compare the migration routes, length of migration, and duration of migration of Peregrine Falcons Falco peregrinus tundrius and Swainson's Hawks Buteo swainsoni in the Western Hemisphere. We radio tracked migrants using the Argos satellite system. Our initial samples were 34 Swainson's Hawks from representative areas of their breeding range, and 61 Peregrine Falcons...
Authors
Mark R. Fuller, William S. Seegar, Linda S. Schueck
Blood changes in mallards exposed to white phosphorus Blood changes in mallards exposed to white phosphorus
White phosphorus (P4) has been extensively used by the military for various purposes, including marking artillery impacts and as an obscurant. Target practice in an Alaskan tidal marsh during the last 4 decades has deposited large amounts of P4 particles in sediments and water, which have resulted in die-offs of several waterfowl species. Because the toxicity of P4 in birds has not been...
Authors
Donald W. Sparling, S. Vann, Robert A. Grove
Assessment of air quality and air pollutant impacts in national parks of the Rocky Mountains and northern Great Plains Assessment of air quality and air pollutant impacts in national parks of the Rocky Mountains and northern Great Plains
No abstract available.
Authors
David L. Peterson, T.J. Sullivan, J.M. Eilers, S. Brace, D. Horner