Publications
Filter Total Items: 2085
Interaction between introduced trout and larval salamanders (Ambystoma macrodactylum) in high-elevation lakes Interaction between introduced trout and larval salamanders (Ambystoma macrodactylum) in high-elevation lakes
The larval stage of the long-toed salamander (Ambystoma macrodactylum) is the top vertebrate predator in high-elevation fishless lakes in the North Cascades National Park Service Complex, Washington (U.S.A.). Although most of these high-elevation lakes were naturally fishless, trout have been stocked in many of them. We sought to determine the effects of physicochemical factors and...
Authors
T. Tyler, W.J. Liss, L. Ganio, Gary L. Larson, Robert L. Hoffman, E. Deimling, G.A. Lomnicky
Choosing indicators of natural resource condition: A case study in Arches National Park, Utah, USA Choosing indicators of natural resource condition: A case study in Arches National Park, Utah, USA
Heavy visitor use in many areas of the world have necessitated development of ways to assess visitation impacts. Arches National Park recently completed a Visitor Experience and Resource Protection (VERP) plan. Integral to this plan was developing a method to identify biological indicators that would both measure visitor impacts and response to management actions. The process used in...
Authors
J. Belnap
Variability of Secchi disk readings in an exceptionally clear and deep caldera lake Variability of Secchi disk readings in an exceptionally clear and deep caldera lake
SUMMARY: The Peromyscus leucopus on a 17-acre study area were live-trapped, marked, and released over a seven-day period. On the three following nights intensive snap-trapping was done on the central acre of the study plot. The animals caught by snap traps in the central acre represented the population of the central acre and several surrounding acres. By the currently accepted methods...
Authors
Gary L. Larson, M.W. Buktenica
Status of the white-faced ibis: Breeding colony dynamics of the Great Basin population, 1985-1997 Status of the white-faced ibis: Breeding colony dynamics of the Great Basin population, 1985-1997
The status of the White-faced Ibis (Plegadis chihi) in the Great Basin is of concern because of its small population size and the limited and dynamic nature of its breeding habitat. We analyzed existing annual survey data for the White-faced Ibis breeding in the Great Basin and surrounding area for 1985-1997. Methods varied among colonies and included flight-line counts and fixed-wing...
Authors
Susan L. Earnst, L. Neel, G.L. Ivey, T. Zimmerman
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
Photosynthesis of the cyanobacterial soil-crust lichen Collema tenax from arid lands in southern Utah, USA: Role of water content on light and temperature responses of CO2 exchange Photosynthesis of the cyanobacterial soil-crust lichen Collema tenax from arid lands in southern Utah, USA: Role of water content on light and temperature responses of CO2 exchange
1. The gelatinous cyanobacterial Collema tenax is a dominant lichen of biotic soil crusts in the western United States. In laboratory experiments, we studied CO2 exchange of this species as dependent on water content (WC), light and temperature. Results are compared with performance of green-algal lichens of the same site investigated earlier. 2. As compared with published data...
Authors
Otto L. Lange, Jayne Belnap, H. Reichenberger
Declining ring-necked pheasants in the Klamath Basin, California: I. Insecticide exposure Declining ring-necked pheasants in the Klamath Basin, California: I. Insecticide exposure
A study of organophosphorus (OP) insecticide exposure was conducted on a declining population of ring-necked pheasants (Phasianus colchicus) associated with agricultural lands at Tule Lake National Wildlife Refuge (TLNWR) during the summers of 1990–92. Findings at TLNWR were compared with a nearby pheasant population at Lower Klamath National Wildlife Refuge (LKNWR) not subjected to...
Authors
Robert A. Grove, D. R. Buhler, Charles J. Henny, A. D. Drew
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
Book Review: Preserving nature in the national parks - A history Book Review: Preserving nature in the national parks - A history
No abstract available.
Authors
D. L. Peterson
Review of 'The golden eagle' by Jeff Watson Review of 'The golden eagle' by Jeff Watson
No abstract available.
Authors
Michael W. Collopy
Review of 'The golden eagle' by Jeff Watson Review of 'The golden eagle' by Jeff Watson
No abstract available.
Authors
Karen Steenhof
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