Publications
Filter Total Items: 2000
Multiscale habitat associations of the sage sparrow: Implications for conservation biology
No abstract available.
Authors
J.T. Rotenberry, Steven T. Knick
DDE, PCBs, cadmium, lead, and mercury concentrations in rhinoceros auklets from Washington
In July 1981, 5 adult rhinoceros auklets (Cerorhinca monocerata) were captured on the ground near nesting areas on each of Protection and Destruction Islands, Washington. The birds were euthanized, and their livers and kidneys removed and analyzed. Levels (I?g / g wet weight) of DDE (0.11 to 0.95), polychlorinated biphenyls (no residue detected [ND] to 1.1), mercury (0.60 to 1.8), and lead (ND to
Authors
L. J. Blus, R. E. Fitzner, L.L. Leschner, U.W. Wilson
Creating raptor benefits from powerline problems
Powerlines benefit raptors by providing enhanced nesting and roosting sites. However, they
also can kill raptors by electrocution and raptors can interfere with power transmission. The electrocution problem has been reduced by correcting existing lethal lines and implementing electrocution safe designs for new lines. Remedial actions include pole modifications, perch management and insulation of
Authors
Michael N. Kochert, R.R. Olendorff
Effects of military training activities on shrub-steppe raptors in southwestern Idaho, USA
), northern harriers (Circus cyaneus), burrowing owls (Athene cunicularia), and short-eared owls (Asio flammeus) inside and outside a military training site in the Snake River Birds of Prey National Conservation Area, southwestern Idaho. The Orchard Training Area is used primarily for armored vehicle training and artillery firing by the Idaho Army National Guard. Relative abundance of nesting pair
Authors
Robert N. Lehman, Karen Steenhof, Michael N. Kochert, L.B. Carpenter
Water-use patterns of woody species in pineland and hammock communities of South Florida
Rockland pine forests of south Florida dominated by Pinus elliottii var. densa characteristically have poor soil development in relation to neighboring hardwood hammocks. This has led to the hypothesis that Everglades hammock trees are more reliant on soil moisture derived from local precipitation whereas pineland plants must depend more on groundwater linked to broader regional hydrologic pattern
Authors
Sharon M. Ewe, Leonel S. Sternberg, David E. Busch
Long-term prairie falcon population changes in relation to prey abundance, weather, land uses, and habitat conditions
We studied a nesting population of Prairie Falcons (Falco mexicanus) in the Snake River Birds of Prey National Conservation Area (NCA) from 1974-1997 to identify factors that influence abundance and reproduction. Our sampling period included two major droughts and associated crashes in Townsend's ground squirrel (Spermophilus townsendii) populations. The number of Prairie Falcon pairs found on lon
Authors
Karen Steenhof, Michael N. Kochert, L.B. Carpenter, Robert N. Lehman
Reproductive characteristics of migratory golden eagles in Denali National Park, Alaska
We describe reproductive characteristics of Golden Eagles (Aquila chrysaetos) breeding in Denali National Park, Alaska during an entire snowshoe hare (Lepus americanus) cycle, 1988-1997. Data on nesting eagles were collected at 58 to 72 nesting areas annually using two aerial surveys. Surveys were conducted during the incubation period to determine occupancy and nesting activities and late in the
Authors
Carol L. McIntyre, Layne G. Adams
Response of high-elevation forests in the Olympic Mountains to climatic change
The gap model ZELIG was used to examine the effects of increased temperature (2°C) and altered precipitation on high-elevation ecosystems of the Olympic Mountains, Washington, U.S.A. Changes in tree species distribution and abundance, as well as stand biomass, were examined on north and south aspects in the dry northeast (NE) and wet southwest (SW) regions of the Olympics for (i) warmer, (ii) warm
Authors
A.N. Zolbrod, D. L. Peterson
Discovery of Cnemidophorus neomexicanus in Arizona
The parthenogenetic whiptail lizard Cnemidophorus neomexicanus is known primarily from the vicinity of the Rio Grande Valley from Espanola, Rio Arriba Co., New Mexico south to near Candelaria, Presidio Co., Texas, and extending westward in southwestern New Mexico to west of Lordsburg, Hidalgo Co. (Fig. 1; Axtell 1966; Cole et al. 1988; Cordes et al. 1989; Degenhardt et al. 1996; Pough 1961; Wright
Authors
Trevor Persons, John W. Wright
A historical perspective and critique of the declining amphibian crisis
Losses of amphibian species and populations are of global concern (Blaustein and Wake 1990, Wyman 1990, Wake 1991, Vial and Saylor 1993, Blaustein 1994) and have been the focus of an increasing number of studies. Still, neither all regions nor all species have declines (Dodd 1997; Green 197; Corn, in press). There also is wide variation in abundance of many species over different years (Pechmann e
Authors
R. Bruce Bury
Defining landscapes suitable for restoration of grizzly bears Ursus arctos in Idaho
Informed management of large carnivores depends on the timely and useful presentation of relevant information. We describe an approach to evaluating carnivore habitat that uses pre-existing qualitative and quantitative information on humans and carnivores to generate coarse-scale maps of habitat suitability, habitat productivity, potential reserves, and areas of potential conflict. We use informat
Authors
Troy Merrill, D.J. Mattson, R. G. Wright, Howard B. Quigley