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: 3618
Forest turnover rates follow global and regional patterns of productivity
Using a global database, we found that forest turnover rates (the average of tree mortality and recruitment rates) parallel broad-scale patterns of net primary productivity. First, forest turnover was higher in tropical than in temperate forests. Second, as recently demonstrated by others, Amazonian forest turnover was higher on fertile than infertile soils. Third, within temperate latitudes, turn
Authors
Nathan L. Stephenson, Phillip J. van Mantgem
Trematodes associated with mangrove habitat in Puerto Rican salt marshes
Batillaria minima is a common snail in the coastal estuaries of Puerto Rico. This snail is host to a variety of trematodes, the most common being Cercaria caribbea XXXI, a microphallid species that uses crabs as second intermediate hosts. The prevalence of infection was higher (7.1%) near mangroves than on mudflats away from mangroves (1.4%). Similarly, there was a significant positive association
Authors
Kevin D. Lafferty, R. F. Hechinger, J. Lorda, L. Soler
Trematodes in snails near raccoon latrines suggest a final host role for this mammal in California Salt Marshes
Of the 18 trematode species that use the horn snail, Cerithidea californica, as a first intermediate host, 6 have the potential to use raccoons as a final host. The presence of raccoon latrines in Carpinteria Salt Marsh, California, allowed us to investigate associations between raccoons and trematodes in snails. Two trematode species, Probolocoryphe uca and Stictodora hancocki, occurred at higher
Authors
K. D. Lafferty, E. J. Dunham
Pintail distribution and selection of marsh types at Mendota Wildlife Area during fall and winter
No abstract available.
Authors
J. P. Fleskes, D.S. Gilmer, R. L. Jarvis
Clemmys marmorata (Pacific Pond Turtle) diet
No abstract available.
Authors
M.R. Jennings, R. L. Hothem
Bufo boreas halophilus (California toad) and Rana catesbeiana (bullfrog)-amplexus
No abstract available.
Authors
M.R. Jennings, J.J. Crayon, R. L. Hothem
Change in area of winter-flooded and dry rice in the northern Central Valley of California determined by satellite imagery
No abstract available.
Authors
J. P. Fleskes, W.M. Perry, K.L. Petrik, R. Spell, F. Reid
Parasitism, productivity, and population growth: response of Least Bell's Vireos (Vireo bellii pusillus) and Southwestern Willow Flycatchers (Empidonax traillii extimus) to cowbird (Molothrus spp.) control
Cowbird (Molothrus spp.) control is a major focus of recovery-oriented management of two endangered riparian bird species,the Least Bell's Vireo (Vireo bellii pusillus) and Southwestern Willow Flycatcher (Empidonax traillii extimus). During the past 20 years, annual trapping of cowbirds at Least Bell's Vireo and Southwestern Willow Flycatcher breeding sites has eliminated or reduced parasitism in
Authors
Barbara E. Kus, Mary J. Whitfield
Factors affecting plant diversity during postfire recovery and succession of mediterranean-climate shrublands in California, USA
Plant community diversity, measured as species richness, is typically highest in the early post-fire years in California shrublands. However, this generalization is overly simplistic and the present study demonstrates that diversity is determined by a complex of temporal and spatial effects. Ninety sites distributed across southern California were studied for 5 years after a series of fires. Chara
Authors
Jon E. Keeley, C. J. Fotheringham, Melanie Baer-Keeley
Fire history of the San Francisco East Bay region and implications for landscape patterns
The San Francisco East Bay landscape is a rich mosaic of grasslands, shrublands and woodlands that is experiencing losses of grassland due to colonization by shrubs and succession towards woodland associations. The instability of these grasslands is apparently due to their disturbance-dependent nature coupled with 20th century changes in fire and grazing activity. This study uses fire history reco
Authors
Jon E. Keeley
Alien plant dynamics following fire in Mediterranean-climate California shrublands
Over 75 species of alien plants were recorded during the first five years after fire in southern California shrublands, most of which were European annuals. Both cover and richness of aliens varied between years and plant association. Alien cover was lowest in the first postfire year in all plant associations and remained low during succession in chaparral but increased in sage scrub. Alien cover
Authors
J. E. Keeley, M. Baer-Keeley, C. J. Fotheringham
Host specificity of Sacculina carcini, a potential biological control agent of the introduced European green crab Carcinus maenas in California
The European green crab, Carcinus maenas, is an introduced marine predator established on the west coast of North America. We conducted laboratory experiments on the host specificity of a natural enemy of the green crab, the parasitic barnacle Sacculina carcini, to provide information on the safety of its use as a possible biological control agent. Four species of non-target, native California cra
Authors
Jeffrey H. R. Goddard, Mark E. Torchin, Armand M. Kuris, Kevin D. Lafferty