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
Clinical disease and laboratory abnormalities in free-ranging desert tortoises in California (1990-1995) Clinical disease and laboratory abnormalities in free-ranging desert tortoises in California (1990-1995)
Desert tortoise (Gopherus agassizii) populations have experienced precipitous declines resulting from the cumulative impact of habitat loss and human and disease-related mortality. Diagnosis of disease in live, free-ranging tortoises is facilitated by evaluation of clinical signs and laboratory test results but may be complicated by seasonal and environmental effects. The goals of this...
Authors
Mary M. Christopher, Kristin H. Berry, Brian T. Henen, Kenneth A. Nagy
Fire and grazing impacts on plant diversity and invasives in the southern Sierra Nevada Fire and grazing impacts on plant diversity and invasives in the southern Sierra Nevada
No abstract available.
Authors
Jon E. Keeley, D. Lubin, C. J. Fotheringham
Tracking spring migration of northern pintails with satellite telemetry Tracking spring migration of northern pintails with satellite telemetry
No abstract available at this time
Authors
M. R. Miller, John Y. Takekawa, D.L. Orthmeyer, J. P. Fleskes, Michael L. Casazza, M.W. Perry
A Technique for Locating and Recovering Radiotransmitters at Close Range A Technique for Locating and Recovering Radiotransmitters at Close Range
No abstract available.
Authors
Gary M. Fellers, Patrick Kleeman
Habitat characteristics associated with abundance of band-tailed pigeons and use of mineral sites in the Pacific Northwest Habitat characteristics associated with abundance of band-tailed pigeons and use of mineral sites in the Pacific Northwest
No abstract available at this time
Authors
C.T. Overton
Fire and exotics in the Mojave Desert: An irreversible change? A state-transition model for blackbrush (Coleogyne ramosissima) habitat Fire and exotics in the Mojave Desert: An irreversible change? A state-transition model for blackbrush (Coleogyne ramosissima) habitat
No abstract available at this time
Authors
D.F. Haines, T. C. Esque, L.A. DeFalco, S.J. Scoles, M.L. Brooks, R. H. Webb
Fire and grazing impacts on plant diversity and alien plant invasions in the southern Sierra Nevada Fire and grazing impacts on plant diversity and alien plant invasions in the southern Sierra Nevada
Patterns of native and alien plant diversity in response to disturbance were examined along an elevational gradient in blue oak savanna, chaparral, and coniferous forests. Total species richness, alien species richness, and alien cover declined with elevation, at scales from 1 to 1000 m2. We found no support for the hypothesis that community diversity inhibits alien invasion. At the 1-m2...
Authors
Jon E. Keeley, Daniel Lubin, C. J. Fotheringham
Plant community patterns in unburned and burned blackbrush (Coleogyne ramosissima) shrublands in the Mojave Desert Plant community patterns in unburned and burned blackbrush (Coleogyne ramosissima) shrublands in the Mojave Desert
The blackbrush vegetation type is dominated by Coleogyne ramossisima, which is thought to preclude the coexistence of many other plant species. Fire can remove blackbrush cover and possibly increase plant species richness and evenness. Fire also may increase the frequency and cover of alien annual grasses, thereby intensifying landscape flammability. We tested these predictions in...
Authors
Matthew L. Brooks, John R. Matchett
The use of multi-temporal Landsat Normalized Difference Vegetation Index (NDVI) data for mapping fuels in Yosemite National Park, USA The use of multi-temporal Landsat Normalized Difference Vegetation Index (NDVI) data for mapping fuels in Yosemite National Park, USA
The objective of this study was to test the applicability of using Normalized Difference Vegetation Index (NDVI) values derived from a temporal sequence of six Landsat Thematic Mapper (TM) scenes to map fuel models for Yosemite National Park, USA. An unsupervised classification algorithm was used to define 30 unique spectral-temporal classes of NDVI values. A combination of graphical...
Authors
Jan W. Van Wagtendonk, Ralph R. Root
Individual variation in space use by female spotted hyenas Individual variation in space use by female spotted hyenas
Large carnivores range more widely than many other terrestrial mammals, and this behavior tends to bring them into frequent conflict with humans. Within any carnivore population, individual variation in patterns of space use should be expected to make some animals more vulnerable than others to risks of mortality from humans and other sources. In this study, our goal was to document...
Authors
Erin E. Boydston, Karen M. Kapheim, Micaela Szykman, Kay E. Holekamp