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: 3618
Pesticides and amphibian population declines in California, USA
Several species of anuran amphibians have undergone drastic population declines in the western United States over the last 10 to 15 years. In California, the most severe declines are in the Sierra Mountains east of the Central Valley and downwind of the intensely agricultural San Joaquin Valley. In contrast, coastal and more northern populations across from the less agrarian Sacramento Valley ar
Authors
Donald W. Sparling, Gary M. Fellers, Laura L. McConnell
Population regulation of the purple sea urchin, Strongylocentritus purpuratus, at the California Channel Islands
No abstract available at this time
Authors
K. D. Lafferty, D. Kushner
Macrofauna communities of exposed sandy beaches on the Southern California mainland and Channel Islands
No abstract available at this time
Authors
J.E. Dugan, D.M. Hubbard, D.L. Martin, J.M. Engle, D.M. Richards, G.E. Davis, K. D. Lafferty, R.F. Ambrose
Floristic surveys of Saguaro National Park Protected Natural Areas
No abstract available at this time
Authors
W. L. Halvorson, B.S. Gebow
Prescribed fire as the minimum tool for wilderness forest and fire regime restoration: a case study from the Sierra Nevada, California
No abstract available at this time
Authors
M. Keifer, N.L. Stephenson, J. Manley
Documenting trans-Himalayan migration through satellite telemetry: A report on capture, deployment, and tracking of bar-headed goose (Anser indicus)
Animal movement and migration studies have made significant progress with the use of telemetry. Conventional radio telemetry has been used in numerous studies in different regions. However, the use of this technology is restricted to species with limited range of movement. Applying this tool for long distance migrants is usually unsatisfactory. Other challenges such as hilly terrain or dense veget
Authors
Sàlim Javed, John Y. Takekawa, David C. Douglas, Asad R. Rahmani, Binod C. Choudhury, Steven L. Landfried, Shruti Sharma
Pepperweed: a growing threat to western wildlife habitat
Counts on photographs and visual estimates of the numbers of territorial gulls are usually reliable indicators of the number of gull nests, but single visual estimates are not adequate to measure the number of nests in individual colonies. To properly interpret gull counts requires that several islands with known numbers of nests be photographed to establish the ratio of gulls to nests applicable
Authors
D.S. Gilmer
Non-native grasses and fires create double jeopardy
No abstract available at this time
Authors
T. Esque, C. Schwalbe
Scientific meeting raises awareness of amphibian decline in Asia
Blood samples from 433 Peregrine Falcons (Falco peregrinus) during fall and spring migrations, 1976-80, indicated that most of their pesticide burden, primarily DDE, was accumulated on wintering grounds in Latin America. DDE in spring migrants returning from Latin America for the first time declined significantly from 1979 to 1980. Only about 10% of breeding-age females contained organochlorine re
Authors
Vance Vredenburg, Yuezhao Wang, Gary M. Fellers
Cryptic genetic variation and paraphyly in ravens
Widespread species that are morphologically uniform may be likely to harbour cryptic genetic variation. Common ravens (Corvus corax) have an extensive range covering nearly the entire Northern Hemisphere, but show little discrete phenotypic variation. We obtained tissue samples from throughout much of this range and collected mitochondrial sequence and nuclear microsatellite data. Our study reveal
Authors
K.E. Omland, C.L. Tarr, W.I. Boarman, J.M. Marzluff, R.C. Fleischer
Fire and exotic grasses changing Mojave's face
No abstract available at this time
Authors
M.L. Brooks, T. C. Esque
Book review: A natural history of the Sonoran Desert
Review info: A Natural History of the Sonoran Desert. Edited by S. J. Phillips and P. W. Comus. 2000. Arizona-Sonora Desert Museum Press, Tucson AZ, and University of California Press, Berkeley CA. 628 pp. Cloth ISBN 0-520-22029-3 Paper ISBN 0-520-21980-5.
Authors
Matthew L. Brooks