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: 3724
Seed predation by yucca moths on semelparous, iteroparous and vegetatively reproducing subspecies of Yucca whipplei (Agavaceae) Seed predation by yucca moths on semelparous, iteroparous and vegetatively reproducing subspecies of Yucca whipplei (Agavaceae)
Yucca whipplei subspecies are distinguished by differences in reproduction: spp. whipplei and ssp. parishii are semelparous, flowering once and dying; ssp. caespitosa is iteroparous, producing multiple rosettes which may flower in different years; ssp. percursa has clonal reproduction from rhizomes, and ssp. intermedia is intermediate to the latter two. Seed loss due to the symbiotic...
Authors
Jon E. Keeley, Sterling C. Keeley, D. A. Ikeda
Carbon, oxygen and hydrogen isotope abundances inStylites reflect its unique physiology Carbon, oxygen and hydrogen isotope abundances inStylites reflect its unique physiology
Natural abundances of oxygen-18, carbon-14, carbon-13 and deuterium were measured inStylites andicola, a terrestrial vascular plant lacking stomates, and two terrestrial plant species having stomates that grew nearby. No substantial differences in oxygen-18 and carbon-13 abundances were observed among the three species. The deuterium concentration inStylites was much higher than in the...
Authors
Leonel d.S.L Sternberg, Michael J. DeNiro, D. McJunkin, R. Berger, Jon E. Keeley
Temporal and spatial distribution of manatees in Kings Bay, Crystal River, Florida Temporal and spatial distribution of manatees in Kings Bay, Crystal River, Florida
No abstract available.
Authors
Howard I. Kochman, Galen B. Rathbun, James A. Powell
Stomatal mechanism as the basis of evolution of crassulacean acid metabolism Stomatal mechanism as the basis of evolution of crassulacean acid metabolism
No abstract available.
Authors
Jon E. Keeley, C.B. Osmond, J.A. Raven
Genetics, minimum population size and the island reserve Genetics, minimum population size and the island reserve
No abstract available at this time
Authors
C. Schonewald-Cox
Climate, snow accumulation, and melt in Sequoia National Park, California. Final contract report to the Sequoia Natural History Association Climate, snow accumulation, and melt in Sequoia National Park, California. Final contract report to the Sequoia Natural History Association
No abstract available at this time
Authors
N.L. Stephenson
The spotted turtles of Cedar Bog: a population in decline The spotted turtles of Cedar Bog: a population in decline
No abstract available at this time
Authors
J.E. Lovich
Aspects of flocking and predator avoidance in wintering shorebirds Aspects of flocking and predator avoidance in wintering shorebirds
No abstract available at this time
Authors
B.E. Kus
The manatee in Haiti The manatee in Haiti
The future looks bleak for the manatee population in the waters around Haiti. Results of a survey conducted by the US Fish and Wildlife Service suggest that numbers have declined drastically over the last 50 years. The best hope for the few remaining is that the hunting expertise will vanish with the older generation.
Authors
G. B. Rathbun, C.A. Woods, J. A. Ottenwalder
Pre-1900 overharvest of California red-legged frogs (Rana aurora draytonii), the inducement for bullfrog (Rana catesbeiana) introduction Pre-1900 overharvest of California red-legged frogs (Rana aurora draytonii), the inducement for bullfrog (Rana catesbeiana) introduction
No abstract available.
Authors
M.R. Jennings, M.P. Hayes
Pup production, abundance, and breeding distribution of northern elephant seals, Winter 1981 Pup production, abundance, and breeding distribution of northern elephant seals, Winter 1981
No abstract available.
Authors
James L. Bodkin, Ronald J. Jameson, Glenn R. VanBlaricom