Printer Friendly

Frog real estate: more than location.

A study of Andean frogs has raised tough questions about strategies for coping with fragmented habitats.

Peter B. Pearman of Evergreen State College in Olympia, Wash., points out that species often dwindle 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 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 sledgehammer 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 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."
COPYRIGHT 1998 Science Service, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 1998, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

Article Details
Printer friendly Cite/link Email Feedback
Title Annotation:research on how fragmented habitats affect Andean frogs
Author:Milius, Susan
Publication:Science News
Article Type:Brief Article
Date:Jan 3, 1998
Words:234
Previous Article:Frogs that talk through their ears.
Next Article:Mammograms get boost for women over 40.
Topics:


Related Articles
Pharming frogs.
Ozone alert; frogs, plankton and people show effects of ozone depletion.
Colossal study shows amphibian woes.
Frogs are Leapin' Back. (Stateline).
Rainforest frogs: vanishing act? Frog populations around the world are dying off mysteriously. Can scientists save them--before it's too late?...
A study of the frog lung fluke Haematoloechus (trematoda: haematoloechidae) collected from areas of Kentucky and Indiana.
Hawaii's hated frogs: tiny invaders raise a big ruckus.
Lost but found.
Frogs in peril, bug zapper mayhem, and the artificial reef debate.
Jumping frogs: hopping into oblivion?

Terms of use | Privacy policy | Copyright © 2019 Farlex, Inc. | Feedback | For webmasters