Frog real estate: more than location.A study of Andean frogs has raised tough questions about strategies for coping with The Coping With series of books is a series of books aimed at 11-16 year olds, written by Peter Corey and published by Scholastic Hippo. The first book, Coping with Parents, was released in 1989, and the series continued until the last book, Coping with Cash fragmented habitats. Peter B. Pearman of Evergreen State College in Olympia, Wash., points out that species often dwindle dwin·dle v. dwin·dled, dwin·dling, dwin·dles v.intr. To become gradually less until little remains. v.tr. To cause to dwindle. See Synonyms at decrease. when a habitat is chopped into small, separated patches. Bears and certain woodland birds shrink in number. Frogs suffer, too. Pearman and David Marsh of the University of California, Davis The University of California, Davis, commonly known as UC Davis, is one of the ten campuses of the University of California, and was established as the University Farm in 1905. warn that proposed fixes for tattered habitats may help one species but not another. They report their findings in the December 1997 Conservation Biology. Marsh studied two species of Eleutherodactylus frogs in snippets of forest in Ecuador. He also checked frogs in an intact, 500-acre forest. "We were looking for Looking for In the context of general equities, this describing a buy interest in which a dealer is asked to offer stock, often involving a capital commitment. Antithesis of in touch with. sledgehammer See Opteron. effects, and we seem to have found them," says Pearman. The numbers of one species seemed to be affected primarily by shrinking fragment size, whereas those of the other responded more to distance between fragments. Pearman warns that protecting corridors of forest that connect fragments, often proposed as a remedy for butchered habitat, would not help the first species, but might benefit the second. In contrast, expanding the boundaries of fragments would help the first frog but not the second. Population biologist Karen R. Lips of St. Lawrence University St. Lawrence University is a private, four-year liberal arts college located in the village of Canton in Saint Lawrence County, New York. Founded in 1856, it is the oldest coeducational university in the state of New York. in Canton, N.Y., predicts that such analysis "is going to be really important for park design or selecting land for preserves." However, she adds, "It makes our job much more difficult." |
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