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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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PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2022. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 30 June 2022

Ultraviolet Radiation

Ultraviolet Radiation

(p.87) Fourteen Ultraviolet Radiation
Amphibian Declines

Andrew R. Blaustein

Lisa K. Belden

University of California Press

Global climate changes, including changes in atmospheric conditions, may be contributing to amphibian population declines. Studies of amphibians and ultraviolet radiation have concentrated on ultraviolet B (UV-B), the portion of the spectrum of most biological concern at the earth's surface. Higher wavelengths are less efficiently absorbed by critical biomolecules; lower wavelengths are absorbed by stratospheric ozone. UV-B radiation is known to induce the formation of photoproducts that can cause cell death or genetic mutations. Seasonal increases in UV-B irradiance linked to stratospheric ozone depletion are well documented at the poles, and there is evidence that UV-B radiation has increased in temperate latitudes. Laboratory studies show detrimental effects of UV-B radiation on amphibian growth, development, and behavior. Field studies demonstrate that ambient UV-B radiation adversely affects the developing embryos of some, but not all, species. Moreover, some recent studies have shown that ambient UV-B radiation may cause malformities. This chapter summarizes the methods, evidence, and implications of the effects of UV-B radiation on amphibians based on the results of field experiments.

Keywords:   ultraviolet radiation, amphibians, population declines, UV-B radiation, field experiments, climate changes, photoproducts, growth, malformities, development

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