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Amphibian DeclinesThe Conservation Status of United States Species$
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Michael Lannoo

Print publication date: 2005

Print ISBN-13: 9780520235922

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520235922.001.0001

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Biology of Amphibian Declines

Biology of Amphibian Declines

(p.28) Seven Biology of Amphibian Declines
Amphibian Declines

David M. Green

University of California Press

This chapter argues that the environmental stressors acting upon populations, especially those stressors of anthropogenic origin, can be better divided into the following three evils: habitat destruction, habitat fragmentation, and habitat degradation. Different species, with differing susceptibilities to extinction, should react to these environmental stressors in various ways depending upon their ecological differences, especially in demographic characteristics and population structures. Amphibians exhibit a variety of natural history and life history strategies, and this concept must apply as much to them as to the organisms upon which it was based. A classic problem in animal demographics and population biology is how populations of small animals (rodents, particularly lemmings, in the classic case) fluctuate in size. To understand amphibian population declines, this chapter examines amphibian persistence, extinction, and population increase. It then places these in the context of habitat destruction, habitat fragmentation, and habitat degradation.

Keywords:   amphibians, population declines, extinction, habitat destruction, habitat fragmentation, habitat degradation, population increase, population biology, environmental stressors

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