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: 3791
The northern pintail in North America: status and conservation needs of a struggling population The northern pintail in North America: status and conservation needs of a struggling population
The number of northern pintails (Anas acuta) in North America continues to be low despite sub- stantially improved wetland habitat conditions as recorded by the May Breeding Population and Habitat Survey (May Survey, United States Fish and Wildlife Service [USFWS] 1998; Figure 1). In 1993-97, following extended drought during the 1980s and early 1990s, favorable precipitation pat- terns...
Authors
Michael R. Miller, David C. Duncan
Effect of high aluminum consumption on mechanics and composition of furculae of free-ranging coots Effect of high aluminum consumption on mechanics and composition of furculae of free-ranging coots
High levels of ingested Al can affect mechanical properties of bones. Because of the spring action of the furcula during the wingbeat, small changes in the mechanical properties of this bone may have measurable impacts on long-distance flight. We examined the furculae and ingesta of free-ranging American coots (Fulica americana) in San Francisco Bay (California, USA), where they consume...
Authors
C. A. Hui, O. Ellers
Summertime transport of current-use pesticides from California's Central Valley to the Sierra Nevada Mountain Range, USA Summertime transport of current-use pesticides from California's Central Valley to the Sierra Nevada Mountain Range, USA
No abstract available.
Authors
James S. LeNoir, L.L. McConnell, G. M. Fellers, T.M. Cahill, J.N. Seiber
Reply to Garshelis and Johnson Reply to Garshelis and Johnson
No abstract available.
Authors
J. A. Estes
Temporal and spatial variability in thalweg profiles of a gravel-bed river Temporal and spatial variability in thalweg profiles of a gravel-bed river
This study used successive longitudinal thalweg profiles in gravel-bed rivers to monitor changes in bed topography following floods and associated large sediment inputs. Variations in channel bed elevations, distributions of residual water depths, percentage of channel length occupied by riffles, and a spatial autocorrelation coefficient (Moran's I) were used to quantify changes in...
Authors
Mary Ann Madej
Studies of reproductive output of the desert tortoise at Joshua Tree National Park, the Mojave National Preserve, and comparative sites Studies of reproductive output of the desert tortoise at Joshua Tree National Park, the Mojave National Preserve, and comparative sites
The stability of any population is a function of how many young are produced and how many survive to reproduce. Populations with low reproductive output and high mortality will decline until such time as deaths and births are at least balanced. Monitoring populations of sensitive species is particularly important to ensure that conditions do not favor decline or extinction. Turtles...
Authors
J.E. Lovich, P. Medica, H. Avery, K. Meyer, G. Bowser, A. Brown
Population energetics of northern pintails in the Sacramento Valley, California Population energetics of northern pintails in the Sacramento Valley, California
No abstract available.
Authors
M. R. Miller, W.E. Newton
Reference conditions for giant sequoia forest restoration: structure, process, and precision Reference conditions for giant sequoia forest restoration: structure, process, and precision
National Park Service policy directs that more natural conditions be restored to giant sequoia groves, which have been altered by a century of fire exclusion. Efforts to find a reasonable and practical definition of “natural” have helped drive scientists and land managers to use past grove conditions as reference conditions for restoration. Extensive research aimed at determining...
Authors
Nathan L. Stephenson
Mast flowering and semelparity in bamboos: The bamboo fire cycle hypothesis Mast flowering and semelparity in bamboos: The bamboo fire cycle hypothesis
No abstract available.
Authors
Jon E. Keeley, William J. Bond
Immaturity risk in a fire-dependent pine Immaturity risk in a fire-dependent pine
No abstract available.
Authors
Jon E. Keeley, Gidi Ne’eman, C. J. Fotheringham
Comparison of post-fire seedling establishment between scrub communities in Mediterranean and non-Mediterranean climate ecosystems Comparison of post-fire seedling establishment between scrub communities in Mediterranean and non-Mediterranean climate ecosystems
1 Both fire regimes and the conditions under which fires occur vary widely. Abiotic conditions (such as climate) in combination with fire season, frequency and intensity could influence vegetation responses to fire. A variety of adaptations facilitate post-fire recruitment in mediterranean climate ecosystems, but responses of other communities are less well known. We evaluated the...
Authors
M.E. Carrington, Jon E. Keeley