Publications
Filter Total Items: 1994
Tundra swan habitat preferences during migration in North Dakota
I studied tundra swan (Cygnus columbianus columbianus) habitat preference in North Dakota during autumn migration, 1988-89. Many thousand tundra swans stop in the Prairie Pothole region during autumn migration, but swan resource use has not been quantified. I examined habitat preference in relation to an index of sago pondweed (Potamogeton pectinatus) presence, extent of open water, and wetland si
Authors
Susan L. Earnst
Holocene paleoecology of an estuary on Santa Rosa Island, California
The middle to late Holocene history and early Anglo-European settlement impacts on Santa Rosa Island, California, were studied through the analysis of sediments in a small estuarine marsh. A 5.4-m-long sediment core produced a stratigraphic and pollen record spanning the last 5200 yr. Three major zones are distinguishable in the core. The lowermost zone (5200 to 3250 yr B.P.) represents a time of
Authors
K.L. Cole, Gaisheng Liu
Integrating limnological characteristics of high mountain lakes into the landscape of a natural area
A general conceptual watershed-lake model of the complex interactions among climatic conditions, watershed location and characteristics, lake morphology, and fish predation was used to evaluate limnological characteristics of high mountain lakes. Our main hypothesis was that decreasing elevation in mountainous terrain corresponds to an increase in diversity of watershed size and lake area, depth,
Authors
Gary L. Larson, A. Wones, C. D. McIntire, B. Samora
Vertical distribution of a deep-water moss and associated epiphytes in Crater Lake, Oregon
A one-person submersible was used to examine the vertical distribution of the deep-water moss
Drepanocladus aduncus (Hedw.) Warnst in Crater Lake (Oregon). Living specimens were found
attached to sediment and rocks at depths between 25 m and 140 m. Dense beds of the moss
were observed at depths between 30 m and 80 m, a region that corresponded roughly to the
zone of maximum primary production
Authors
C. D. McIntire, H.K. Phinney, Gary L. Larson, M. W. Buktenica
Identification of kin structure among Guam rail founders: a comparison of pedigrees and DNA profiles
Kin structure among founders can have a significant effect on subsequent population structure. Here we use the correlation between DNA profile similarity and relatedness calculated from pedigrees to test hypotheses regarding kin structure among founders to the captive Guam rail (Rallus owstoni) population. Five different pedigrees were generated under the following hypotheses: (i) founders are unr
Authors
Susan M. Haig, J.D. Ballou, N.J. Casna
Study documents mountain goat impacts at Olympic National Park
No abstract available.
Authors
Edward G. Schreiner, Andrea Woodward
Life-history organization of Yellowstone cutthroat trout (Oncorhynchus clarki bouvieri) in Yellowstone Lake
Life-history organization of the cutthroat trout (Oncorhynchus clarki) may be viewed at various levels, including species, subspecies, metapopulation, population, or individual. Each level varies in spatial scale and temporal persistence, and components at each level continually change with changes in environment. Cutthroat trout are widely distributed throughout the western United States, occurri
Authors
Robert E. Gresswell, W.J. Liss, Gary L. Larson
Biology of North American tortoises
Chelonians have fascinated people for centuries and have been the object of biological studies for nearly as long. Perhaps the long life span and harmless demeanor of most species contribute to their wide appeal. they also represent a link to the distant past because their characteristic shell separated this line of ectotherms from all other reptiles and all other animals in the age of dinosaurs (
Monitoring data supports hunting closure
No abstract available.
Authors
Russell Galipeau, K.J. Jenkins, B. Route
Accumulation and effects of lead and cadmium on wood ducks near a mining and smelting complex in Idaho
A study of wood ducks (Aix sponsa) was conducted along the Coeur d'Alene River system in northern Idaho in 1986 and 1987. Most of this area has been subjected to severe contamination from lead and other metals from mining and smelting since the 1880s. In 1986, a preliminary study of wood duck nesting was conducted in the contaminated area; incubating hens captured in nest boxes were bled and weigh
Authors
Lawrence J. Blus, Charles J. Henny, David J. Hoffman, Robert A. Grove
Seasonal use of conservation reserve program lands by white-tailed deer in east-central South Dakota
The Conservation Reserve Program (CRP_, a provision of the 1985 Food Security Act, subsidizes landowners to take highly erodible lands out of cultivation and seed them to perennial cover for 10years. In eastern South Dakota, 0.5 million ha were enrolled in the CRP from 1985 to 1990 (Agric. Stabilization and Conserv. Serv., Brookings, S.D., unpubl. Data), which represents the largest change in cons
Authors
Jeffrey H. Gould, Kurt J. Jenkins
Roosevelt elk selection of temperate rain forest seral stages in western Washington
We studied habitat selection by Roosevelt elk (Cervus elaphus roosevelti) in a temperate rain forest in the lower Queets River Valley of the western Olympic Peninsula, Washington from June 1986-July 1987. Elk annual home ranges included predominantly unlogged forests protected within Olympic National Park and logged, regenerating forests adjacent to the park. Radio-collared elk selected valley flo
Authors
Greg L. Schroer, Kurt J. Jenkins, Bruce B. Moorhead