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Full-Text Articles in Ecology and Evolutionary Biology
Life-History Evolution In Guppies. Vii. The Comparative Ecology Of High- And Low-Predation Environments, David Reznick, Mark J. Butler Iv, Helen Rodd
Life-History Evolution In Guppies. Vii. The Comparative Ecology Of High- And Low-Predation Environments, David Reznick, Mark J. Butler Iv, Helen Rodd
Biological Sciences Faculty Publications
Prior research has demonstrated a strong association between the species of predators that co-occur with guppies and the evolution of guppy life histories. The evolution of these differences in life histories has been attributed to the higher mortality rates experienced by guppies in high-predation environments. Here, we evaluate whether there might be indirect effects of predation on the evolution of life-history patterns and whether there are environmental differences that are correlated with predation. To do so, we quantified features of the physical and chemical environment and the population biology of guppies from seven high-and low-predation localities. We found that high-predation …
Twenty-Five Years Of Population Fluctuations Of Microtus Ochrogaster And M-Pennsylvanicus In Three Habitats In East-Central Illinois, Lowell L. Getz, Joyce E. Hofmann, Betty Mcguire, Thomas W. Dolan Iii
Twenty-Five Years Of Population Fluctuations Of Microtus Ochrogaster And M-Pennsylvanicus In Three Habitats In East-Central Illinois, Lowell L. Getz, Joyce E. Hofmann, Betty Mcguire, Thomas W. Dolan Iii
Biological Sciences Faculty Publications
Populations of 2 species of arvicoline rodents, the prairie vole (Microtus ochrogaster) and meadow vole (M. pennsylvanicus), were monitored monthly in alfalfa, bluegrass, and tallgrass prairie habitats in east-central Illinois from 1972 through 1997. Alfalfa provides very highquality preferred food and poor vegetative cover for both vole species, whereas bluegrass provides intermediate food and vegetative cover. Preferred food resources were very low, especially for M. ochrogaster, and vegetative cover was very dense in tallgrass prairie. Maximum and mean population densities of M. ochrogaster were highest in alfalfa, intermediate in bluegrass, and lowest in tallgrass prairie. …