(US)
Descripción:
xviii, 507 pages.42 chapters in six sections: Lanscape Patterns and Biogeography; Species Status; Regional and State Status; Diseases and Toxins; Conservation; and Monitoring and Applications. In 1990 an international group of biologists, meeting to discuss rumors of declines in the number of amphibians, discovered that amphibian disappearances once thought to be a local problem were not—the problem was global. And, even more disturbing, amphibians were disappearing not just from areas settled by humans but from regions of the world once believed to be pristine. Under the mantle of the Declining Amphibian Populations Task Force, this timely book addresses three fundamental questions for the midwestern United States: are amphibians declining; if so, why; and, if so, what can be done to halt these losses? In the Midwest—defined here as Missouri, Iowa, Illinois, Indiana, Ohio, Minnesota, Wisconsin, and Michigan—there can be no doubt that the number of salamanders and frogs has declined with… Leer más