Publications
Filter Total Items: 1994
A model for nematode locomotion in soil
Locomotion of nematodes in soil is important for both practical and theoretical reasons. We constructed a model for rate of locomotion. The first model component is a simple simulation of nematode movement among finite cells by both random and directed behaviours. Optimisation procedures were used to fit the simulation output to data from published experiments on movement along columns of soil or
Authors
H. William Hunt, Diana H. Wall, Nicole DeCrappeo, John S. Brenner
A targeted mist-net capture technique for the willow flycatcher
No abstract available.
Authors
Mark K. Sogge, J.C. Owen, Eben H. Paxton, S.M. Langridge
Aeolian dust in Colorado Plateau soils: Nutrient inputs and recent change in source
Aeolian dust (windblown silt and clay) is an important component in arid-land ecosystems because it may contribute to soil formation and furnish essential nutrients. Few geologic surfaces, however, have been characterized with respect to dust-accumulation history and resultant nutrient enrichment. We have developed a combination of methods to identify the presence of aeolian dust in arid regions a
Authors
Richard L. Reynolds, Jayne Belnap, Paul Lamothe, Fred Luiszer
Myrmecophagy by Yellowstone grizzly bears
I used data collected during a study of radio-marked grizzly bears (Ursus arctos horribilis) in the Yellowstone region from 1977 to 1992 to investigate myrmecophagy by this population. Although generally not an important source of energy for the bears (averaging <5% of fecal volume at peak consumption), ants may have been an important source of protein during midsummer and were heavily consumed du
Authors
David J. Mattson
Effects of selenium, mercury, and boron on waterbird egg hatchability at Stillwater, Malheur, Seedskadee, Ouray, and Benton Lake National Wildlife Refuges and surrounding vicinities
No abstract available.
Authors
C. J. Henny, R. A. Grove, V.R. Bentley
Geologic studies in Alaska by the U.S. Geological Survey, 1998
The 14 papers that follows continue the series of U.S. Geological Survey (USGS) reports on investigations in the geologic sciences in Alaska. The series presents new and sometimes preliminary findings that are of interest to earth scientists in academia, government, and industry; to land and resource managers; and to the general public. Reports presented in Geologic Studies in Alaska cover a broad
Geologic studies in Alaska by the U.S. Geological Survey, 1997
The eight papers that follow continue the series of U.S. Geological Survey (USGS) reports on investigations in the geologic sciences in Alaska. The series presents new and sometimes preliminary findings that are of interest to earth scientists in academia, government, and industry; to land and resource managers; and to the general public. Reports presented in Geologic Studies in Alaska cover a bro
Amphibians of Olympic National Park
Amphibians evolved from fishes about 360 million years ago and were the first vertebrates adapted to life on land. The word amphibian means "double life." It refers to the life history of many amphibians, which spend part of their life in water and part on land. There are three major groups of amphibians: salamanders, frogs, and toads, and caecilians. Salamanders, frogs, and toads can be found in
Authors
Assessing southern flying squirrel, Glaucomys volans, habitat selection with kernel home range estimation and GIS
No abstract available.
Authors
James F. Taulman, D.E. Seaman
Carbon distribution in subalpine forests and meadows of the Olympic Mountains, Washington
stimates of C storage in mountainous regions are rare. Forest–meadow ecotones in subalpine ecosystems, which contain a mosaic of forests and meadows, may be particularly sensitive to future changes in climate and are therefore important to include in estimates of terrestrial C storage. In this study, we quantified soil C and ecosystem C pools in subalpine forest and meadow soils of the northeaster
Authors
S.J. Prichard, D. L. Peterson, R.D. Hammer
Seasonal variation in concentrations of fiber, crude protein, and phenolic compounds in leaves of red alder (Alnus rubra): Nutritional implications for cervids
We sought to determine whether changes in chemical composition could be a factor in increased utilization of red alder (Alnus rubra) by the two cervids, the Columbian black-tailed deer (Odocoileus hemionus columbianus) and Roosevelt elk (Cervus elaphus roosevelti), during the fall in parts of the Douglas fir region of the Pacific Northwest. We found that concentrations and astringency of phenolic
Authors
M. P. Gonzalez-Hernandez, Edward E. Starkey, J. Karchesy