Ecology .... over 150 million years ago, "By 1994 a probable cause had been ascertained as a result of a series of experiments conducted in Oregon. UV-B, exposure to which .... (1598 6 )
The Decline of the Amphibians .... populations of R. cascadae have suffered an 80% decline in Oregon and have .... Ultraviolet radiation in the 290 to 320 nanometer band (UV-B) can greatly affect .... (2277 9 )
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