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: 3617
Effects of avian cholera on survival of Lesser Snow geese Anser caerulescens: An experimental approach
Avian cholera, caused by the bacterium Pasteurella multocida, is one of the most important diseases affecting waterfowl in North America but little is known about the epizootiology of this disease or its impacts on annual survival rates. We ringed Lesser Snow Geese Anser caerulescens nesting at Wrangel Island, Russia and Banks Island, Canada with metal rings and individually coded plastic neck-col
Authors
Michael D. Samuel, John Y. Takekawa, Vasily V. Baranyuk, Dennis L. Orthmeyer
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, including tort
Authors
J.E. Lovich, P. Medica, H. Avery, K. Meyer, G. Bowser, A. Brown
The diving physiology of bottlenose dolphins (Tursiops truncatus). III. Thermoregulation at depth
During diving, marine mammals initiate a series of cardiovascular changes that include bradycardia and decreased peripheral circulation. Because heat transfer from thermal windows located in peripheral sites of these mammals depends on blood flow, such adjustments may limit their thermoregulatory capabilities during submergence. Here, we demonstrate how the thermoregulatory responses of bottlenose
Authors
T. M. Williams, D. Noren, P. Berry, J. A. Estes, C. Allison, J. Kirtland
Thamnophis elegans vagrans (wandering garter snake). Diet
No abstract available.
Authors
C.W. Painter, N. J. Scott, M.J. Altenbach
Population energetics of northern pintails in the Sacramento Valley, California
No abstract available.
Authors
M. R. Miller, W.E. Newton
Photosynthetic pathway diversity in a seasonal pool community
1. Photosynthetic pathway diversity was evaluated for the dominant species in a seasonally aquatic community in the south-western USA using 14C pulse-chase techniques.2. Under submerged conditions, only about half of the species were clearly C3, three of the 15 dominants were CAM, one species was C4 and three were potentially assimilating carbon with both C3 and C4 fixation.3. During the brief ter
Authors
Jon E. Keeley
Role of charred wood, heat-shock and light in germination of postfire phrygana species from the eastern Mediterranean Basin
Seeds of 22 species collected from recently burned phrygana were tested for their response to fire-type cues of charred wood and heat-shock. All Cistus species were stimulated by brief heat-shock, as shown in previous studies; however, none responded to charred wood. Only one of the 22 species was stimulated by charred wood, and only in dark-inhibited seeds, and this response did not occur in the
Authors
Jon E. Keeley, Melanie Babr-Keeley
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 reference conditi
Authors
Nathan L. Stephenson
Mast flowering and semelparity in bamboos: The bamboo fire cycle hypothesis
No abstract available.
Authors
Jon E. Keeley, William J. Bond
Habitat invasibility and dominance by alien annual plants in the western Mojave Desert
No abstract available.
Authors
M.L. Brooks
Immaturity risk in a fire-dependent pine
No abstract available.
Authors
J. E. Keeley, Gidi Ne'eman, C. J. Fotheringham