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: 3776
Canvasback ducks Canvasback ducks
Canvasbacks (Aythya valisineria) are unique to North America and are one of our most widely recognized waterfowl species. Unlike other ducks that nest and feed in uplands, diving ducks such as canvasbacks are totally dependent on aquatic habitats throughout their life cycle. Canvasbacks nest in prairie, parkland, subarctic, and Great Basin wetlands; stage during spring and fall on...
Authors
William L. Hohman, G.Michael Haramis, Dennis G. Jorde, Carl E. Korschgen, John Y. Takekawa
Disappearance of the Tarahumara frog Disappearance of the Tarahumara frog
In the spring of 1983 the last known Tarahumara frog in the United States was found dead. Overall, the species seems to be doing well in Mexico, although the decline of more northern populations are of concern. The Tarahumara frog (Rana tarahumarae) inhabits seasonal and permanent bedrock and bouldery streams in the foothills and main mountain mass of the Sierra Madre Occidental of...
Authors
S.F. Hale, C.R. Schwalbe, J.L. Jarchow, C. May, C.H. Lowe, T.B. Johnson
Modeling the dynamics of marine species: the importance of incorporating larval dispersal Modeling the dynamics of marine species: the importance of incorporating larval dispersal
No abstract available at this time
Authors
S.D. Gaines, K. D. Lafferty
Breeding seabirds in California, Oregon and Washington Breeding seabirds in California, Oregon and Washington
More than two million seabirds of 29 species nest along the west coasts of California, Oregon, and Washington, including three species listed on the federal list of threatened and endangered species: the brown pelican (Pelecanus occidentalis), least tern (Sterna antillarum), and marbled murrelet (Brachyramphus marmoratus). The size and diversity of the breeding seabird community in this...
Authors
Harry R. Carter, David S. Gilmer, Jean E. Takekawa, Roy W. Lowe, Ulrich W. Wilson
Agricultural drainwater effects on wildlife in central California Agricultural drainwater effects on wildlife in central California
In California's San Joaquin Valley and in numerous other agricultural areas in the western U.S., irrigation wastewater may accumulate in confined shallow aquifers, eventually rising to levels that adversely affect crops. To sustain long-term agricultural productivity in these regions, systems for the drainage and disposal of this subsurface wastewater must be installed.1,2 the drained...
Authors
Harry M. Ohlendorf, Roger L. Hothem
Analysis of larval trematode communities Analysis of larval trematode communities
We can compare natural communities with null models of communities to indicate how they differ from random assemblages of species (i.e., how much structure is present). However, because null models draw on observed values of species' prevalences, whatever structure already exists in natural communities affects the composition of a null model and weakens its comparative power. To address...
Authors
Kevin D. Lafferty, D. T. Sammond, A. M. Kuris
Long-term dynamics of giant sequoia populations: implications for managing a pioneer species Long-term dynamics of giant sequoia populations: implications for managing a pioneer species
No abstract available at this time
Authors
N.L. Stephenson
Decline of Frog Species in the Yosemite Section of the Sierra Nevada Decline of Frog Species in the Yosemite Section of the Sierra Nevada
No abstract available at this time
Authors
Charles A. Drost, Gary M. Fellers
Restoration of lesser snow geese to East Asia: a North Pacific Rim conservation project Restoration of lesser snow geese to East Asia: a North Pacific Rim conservation project
No abstract available.
Authors
John Y. Takekawa, D. L. Orthmeyer, Masayuki Kurechi, Yutaka Sabano, E. Syroechkovsky, K.E. Litvin, Vasily V. Baranyuk, A.V. Andreev
Species diversity, selectivity, and habitat associations of small mammals from coastal California Species diversity, selectivity, and habitat associations of small mammals from coastal California
Species diversity and habitat associations were documented for small mammals along 16 transects in a semiarid part of coastal California. Peromyscus were the most abundant, comprising 45.3% of all captures, followed by Dipodomys (21.2%), Neotoma (15.1%), and Perognathus (15.0%). Five additional genera made up the remaining captures (3.4%). Peromyscus truei and Perognathus californicus...
Authors
Gary M. Fellers
Potential impacts of the Black Canyon Bridge on bighorn sheep: A reevaluation using a GIS habitat evaluation model Potential impacts of the Black Canyon Bridge on bighorn sheep: A reevaluation using a GIS habitat evaluation model
No abstract available at this time
Authors
D.W. Ebert, C. L. Douglas
Trends in reptiles populations on the Nevada Test Site Trends in reptiles populations on the Nevada Test Site
No abstract available at this time
Authors
P.A. Medica, M.B. Saethre, R.B. Hunter, J. D. Drummond