Publications
Below is a list of WERC's peer-reviewed publications. If you are searching for a specific publication and cannot find it in this list, please contact werc_web@usgs.gov
Filter Total Items: 3724
Waterfowl migration on Klamath Basin National Wildlife Refuges 1953-2001 Waterfowl migration on Klamath Basin National Wildlife Refuges 1953-2001
The Klamath Basin National Wildlife Refuge (NWR) complex, located in northeastern California and southern Oregon, is situated on a major Pacific Flyway migration corridor connecting waterfowl breeding grounds in the north with major wintering grounds in California and Mexico. The complex comprises five waterfowl refuges including Lower Klamath NWR, Tule Lake NWR, Upper Klamath NWR...
Authors
David S. Gilmer, Julie L. Yee, David M. Mauser, James M. Hainline
The role of fire, rodents and ants in changing plant communities in the Mojave Desert The role of fire, rodents and ants in changing plant communities in the Mojave Desert
No abstract available at this time
Authors
T. C. Esque
Bald Eagles consume Emperor Geese during late-winter in the Aleutian Archipelago Bald Eagles consume Emperor Geese during late-winter in the Aleutian Archipelago
Emperor Geese (Chen canagica) are a species of concern because their population has declined rapidly since the mid-1960s and continues to remain below management objectives (Petersen et al. 1994). Emperor Geese are restricted primarily to Alaska and exhibit an east-west migration pattern, whereby most birds begin breeding on the Yukon-Kuskokwim Delta by mid-May, stage on the Alaska...
Authors
Mark A. Ricca, Robert G. Anthony, Jeffrey C. Williams
Using radiotelemetry to monitor cardiac response of free-living tule greater white-fronted geese (Anser albifrons elgasi) to human disturbance Using radiotelemetry to monitor cardiac response of free-living tule greater white-fronted geese (Anser albifrons elgasi) to human disturbance
We monitored the heart rates of free-living Tule Greater White-fronted Geese (Anser albifrons elgasi) during human disturbances on their wintering range in the Sacramento Valley of California during 1997. We used implanted radio transmitters to record the heart rates of geese as an observer experimentally approached them at a constant walking speed. On average, geese flushed when...
Authors
Joshua T. Ackerman, John Y. Takekawa, K.L. Kruse, D.L. Orthmeyer, J.L. Yee, Craig R. Ely, David H. Ward, Karen S. Bollinger, Daniel M. Mulcahy
Fire regimes and vegetation responses in two Mediterranean-climate regions Fire regimes and vegetation responses in two Mediterranean-climate regions
Brain cholinesterase activities were determined in birds from forests sprayed with Dylox2 at 1.13 kg/hectare (1 lb/acre ? active ingredient [a.i.]) or Sevin-4-oil2 at 1.13 kg/hectare (1 lb/acre ? a.i.) for up to 5 days postspray. Of ten bird species evaluated from the Dylox spray area, four species represented by six individuals had values which were depressed more than 2 standard...
Authors
Gloria Montenegro, Rosanna Ginocchio, Alejandro Segura, Jon E. Keeley, Miguel Gomez
Sunrise nest attendance and aggression by least Bell's vireos fail to deter cowbird parasitism Sunrise nest attendance and aggression by least Bell's vireos fail to deter cowbird parasitism
We video-recorded three, natural, brood-parasitism events by Brown-headed Cowbirds (Molothrus ater) at nests of Least Bell's Vireos (Vireo bellii pusillus). All instances occurred near dawn, during both egg-laying and incubation stages of the nesting cycle. In each case, an adult vireo was on the nest when the female cowbird arrived. Both members of each parasitized pair vigorously...
Authors
Bryan L. Sharp, Barbara E. Kus
Distribution and abundance of the southwestern willow flycatcher at selected southern California sites in 2001. Prepared for the California Department of Fish and Game, Wildlife Management Division, Sacramento, California Distribution and abundance of the southwestern willow flycatcher at selected southern California sites in 2001. Prepared for the California Department of Fish and Game, Wildlife Management Division, Sacramento, California
No abstract available at this time
Authors
J. Rourke, B. Kus, M. Whitfield
Effects of natural forest fragmentation on a Hawaiian spider community Effects of natural forest fragmentation on a Hawaiian spider community
The kipuka system, a network of forest fragments surrounded by lava flows on the island of Hawaii, offers an opportunity to study the natural, long-term fragmentation of a native ecosystem. We examined the impacts of habitat edges upon the community structure of nocturnally active native spiders, primarily in the genus Tetragnatha. We measured plant and spider species distributions...
Authors
Amy G. Vandergast, Rosemary G. Gillespie
Bat inventory of the Descanso district of the Cleveland National Forest, San Diego County, California Bat inventory of the Descanso district of the Cleveland National Forest, San Diego County, California
No abstract available at this time
Authors
D.C. Stokes, Robert N. Fisher
Spatial and Temporal Patterns of Off-highway Vehicle Use at the Dove Springs OHV Open Area, California. Report prepared for the Bureau of Land Management, California State Office, Sacramento, California Spatial and Temporal Patterns of Off-highway Vehicle Use at the Dove Springs OHV Open Area, California. Report prepared for the Bureau of Land Management, California State Office, Sacramento, California
No abstract available at this time
Authors
J.R. Matchett, L. Gass, M.L. Brooks, A.M. Mathie, R.D. Vitales, M.W. Campagna, D. M. Miller, J.F. Weigand
Fire as an ecological process Fire as an ecological process
This chapter investigates fire as a dynamic ecosystem process by first investigating fire in the context of general ecological theory, then discussing the concept of fire regimes, and finally by developing and applying a new framework for classifying fire regimes that better allows for the understanding of the patterns of fire as processes within ecosystems. Moreover, the chapter covers...
Authors
N. G. Sugihara, J. W. van Wagtendonk, J. Fites-Kaufman
La prevention des risques et la lutte contre les incendies dans un paysage fortement marque par la presence humaine: les incendies de chaparral californien La prevention des risques et la lutte contre les incendies dans un paysage fortement marque par la presence humaine: les incendies de chaparral californien
No abstract available at this time
Authors
Jon E. Keeley, C. J. Fotheringham