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: 3743
Role of charred wood, heat-shock and light in germination of postfire phrygana species from the eastern Mediterranean Basin 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...
Authors
Jon E. Keeley, Melanie Babr-Keeley
Association of seasonal reproductive patterns with changing food availability in an equatorial carnivore, the spotted hyaena (Crocuta crocuta) Association of seasonal reproductive patterns with changing food availability in an equatorial carnivore, the spotted hyaena (Crocuta crocuta)
Reproductive seasonalitywas examined inan equatorial populationof free-living spotted hyaenas (Crocuta crocuta) inKenya. The study population was observed continuously for 10 years, duringwhich time the dates of all births, conceptions, weanings,andcubdeathswererecorded.Local preyabundancewasestimatedtwoto four timespermonth, andrainfallwas recordeddailythroughout thestudyperiod
Authors
K.E. Holekamp, M. Szykman, E. E. Boydston, L. Smale
Connectivity: Maintaining flows in fragmented landscapes Connectivity: Maintaining flows in fragmented landscapes
No abstract available.
Authors
A. Dobson, K. Ralls, M. Foster, M. E. Soule, D. Simberloff, D. Doak, J. A. Estes, L. S. Mills, D. Mattson, R. Dirzo, H. Arita, S. Ryan, E. A. Norse, R. F. Noss, D. Johns
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
Second year of surveying for fishes on the Santa Margarita River, San Diego and Riverside counties, California: September-December, 1998 Second year of surveying for fishes on the Santa Margarita River, San Diego and Riverside counties, California: September-December, 1998
No abstract available at this time
Authors
Robert N. Fisher, C. C. Swift
Bullfrogs-dinner guests we're sorry we invited. Arizona-Sonora Desert Museum, Tucson Bullfrogs-dinner guests we're sorry we invited. Arizona-Sonora Desert Museum, Tucson
No abstract available at this time
Authors
C. Schwalbe, P. Rosen
Photosynthetic pathway diversity in a seasonal pool community 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...
Authors
Jon E. Keeley
Alien annual grasses and fire in the Mojave Desert Alien annual grasses and fire in the Mojave Desert
No abstract available.
Authors
M.L. Brooks
Reexamining fire suppression impacts on brushland fire regimes Reexamining fire suppression impacts on brushland fire regimes
California shrubland wildfires are increasingly destructive, and it is widely held that the problem has been intensified by fire suppression, leading to larger, more intense wildfires. However, analysis of the California Statewide Fire History Database shows that, since 1910, fire frequency and area burned have not declined, and fire size has not increased. Fire rotation intervals have...
Authors
Jon E. Keeley, C. J. Fotheringham, Marco Morais
Extirpation and recolonization in a metapopulation of an endangered fish, the tidewater goby Extirpation and recolonization in a metapopulation of an endangered fish, the tidewater goby
The tidewater goby ( Eucyclogobius newberryi ), an endangered species in the United States, occurs in a series of isolated coastal wetlands in California. Using historical presence-absence data and our own surveys, we estimated annual rates of extirpation and recolonization for several populations of the goby in southern California. As predicted, large wetlands had lower rates of...
Authors
K. D. Lafferty, C. C. Swift, R.F. Ambrose