Publications
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Contaminants in eggs of colonial waterbirds and hepatic cytochrome P450 enzyme levels in pipped tern embryos, Washington State Contaminants in eggs of colonial waterbirds and hepatic cytochrome P450 enzyme levels in pipped tern embryos, Washington State
Eggs of Forster's terns (Sterna forsteri) collected in 1991 from nesting colonies on Crescent Island (Columbia River) and the Potholes Reservoir in south central Washington generally contained low residues of organochlorine pesticides and metabolites, 2,3,7,8-tetrachlorodibenzo-p-dioxin, 2,3,7,8-tetrachlorodibenzofuran, and polychlorinated biphenyls (PCBs). Hepatic cytochrome P450 enzyme...
Authors
L. J. Blus, M. J. Melancon, D. J. Hoffman, Charles J. Henny
Effects of pesticides on Canada Geese Effects of pesticides on Canada Geese
This paper summarizes published and unpublished sources relating to exposure of Canada geese (Branta canadensis) to pesticides, emphasizing documented episodes of poisoning by organochlorine (OC), organophosphorus (OP), and carbamate compounds. Canada geese accumulate the lipid-soluble OC compounds, although they have a lower potential for biomagnification of these pesticides than...
Authors
L. J. Blus
Variability in seed dormancy of three Pacific Northwestern grasses Variability in seed dormancy of three Pacific Northwestern grasses
No abstract available.
Authors
Melinda M. Trask, David A. Pyke
Large-scale fire disturbance: From concepts to models Large-scale fire disturbance: From concepts to models
No abstract available.
Authors
D. L. Peterson
Forest floor bryophytes of Pseudotsuga menziesii-Tsuga heterophylla stand in Oregon: Influences of substrate and overstory Forest floor bryophytes of Pseudotsuga menziesii-Tsuga heterophylla stand in Oregon: Influences of substrate and overstory
Species richness and abundance of bryophytes inhabiting forest floor substrates were assessed at two sites in western Oregon. Bryophyte diversity, abundance, and community composition were compared between sites, and between young forest stands (~55 yrs) and old-growth stands (400 + yrs) within each site. Relationships of stand structural features to diversity and community composition...
Authors
T. Rambo, Patricia S. Muir
Winter foraging ecology of bald eagles on a regulated river in southwest Idaho Winter foraging ecology of bald eagles on a regulated river in southwest Idaho
We studied Bald Eagle foraging ecology on the South Fork Boise River,Idaho, during the winters of 1990-92. We compared habitat variables at 29 foraging sites, 94 perch sites, and 131 random sites.Habitat variables included river habitat (pool, riffle, run), distance to the nearest change in river habitat, distance to nearest available perch, number and species of surrounding perches, and...
Authors
Gregory S. Kaltenecker, Karen Steenhof, Marc J. Bechard, James C. Munger
Short-term influence of tank tracks on vegetation and microphytic crusts in shrubsteppe habitat Short-term influence of tank tracks on vegetation and microphytic crusts in shrubsteppe habitat
Nutt.) habitat within the Idaho Army National Guard Orchard Training Area in southwestern Idaho. The purpose of this study was to determine the short-term (1–2 years) influence of tank tracks on vegetation and microphytic crusts in shrubsteppe habitat. The two types of tank tracks studied were divots (area where one track has been stopped or slowed to make a sharp turn) and straight-line...
Authors
Stephen E. Watts
Demographic and growth responses of a guerrilla and a phalanx perennial grass in competitive mixtures Demographic and growth responses of a guerrilla and a phalanx perennial grass in competitive mixtures
The advantages of guerrilla and phalanx growth for the guerrilla Elymus lanceolatus ssp. lanceolatus and phalanx E. l. ssp. wawawaiensis were evaluated over 2 years in two taxon mixtures with a range of densities of each subspecies and under two levels of watering. Ramet numbers and biomass of the guerrilla subspecies were higher than those of the phalanx grass in the first year but in...
Authors
L. David Humphrey, David A. Pyke
Limitations to mapping habitat use areas in changing landscapes using the Mahalanobis distance statistic Limitations to mapping habitat use areas in changing landscapes using the Mahalanobis distance statistic
We tested the potential of a GIS mapping technique, using a resource selection model developed for black-tailed jackrabbits (Lepus californicus) and based on the Mahalanobis distance statistic, to track changes in shrubsteppe habitats in southwestern Idaho. If successful, the technique could be used to predict animal use areas, or those undergoing change, in different regions from the...
Authors
Steven T. Knick, J.T. Rotenberry
Spatial distribution of breeding passerine bird habitats in a shrubsteppe region of southwestern Idaho Spatial distribution of breeding passerine bird habitats in a shrubsteppe region of southwestern Idaho
A paper describing the similarities and differences between trichomoniasis and pox infection. The need for laboratory diagnosis to differentiate between them is indicated.
Authors
Steven T. Knick, J.T. Rotenberry
Age determination in turtles: Evidence of annual deposition of scute rings Age determination in turtles: Evidence of annual deposition of scute rings
No abstract available.
Authors
David J. Germano, R. Bruce Bury
A comparison of small-mammal communities in a desert riparian floodplain A comparison of small-mammal communities in a desert riparian floodplain
We compared small-mammal communities between inactive floodplain and actively flooded terraces of riparian habitat in the Verde Valley of central Arizona. We used species diversity, abundance, weight of adult males, number of juveniles, number of reproductively active individuals, longevity, residency status, and patterns of microhabitat use to compare the two communities. Although...
Authors
Laura E. Ellison, Charles van Riper