| Abstract: | Field exposures of Bufo boreas embryos to fractions of ambient UV-B radiation at two sites in Rocky Mountain National Park, Colorado, USA, were conducted to evaluate UV-B as a possible cause of recent severe declines of this species. There were no differences in hatching success of B. boreas embryos exposed to 0-100% of ambient UV-B radiation at either study site, results that are different from those of recent studies in Oregon that found increased mortality of B. boreas embryos exposed to ambient UV-B. The reasons for these differing results are not apparent, and several possible explanations exist, including differences in experimental design, presence or absence of a pathogenic fungus, and geographic genetic variation. Bufo boreas embryos were probably not receiving higher doses of UV-B radiation during the experiments in Oregon compared to the experiments in this study. Results of this study do not support UV-B radiation alone as the cause of the decline of B. boreas during the past 20 yr in the southern Rocky Mountains, but UV-B cannot be dismissed because of the contradictory results from other studies. |
| Genre: | Article |
| ProdID: | 70020739 |
| Citation Author: | Corn, P. S. |
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| Citation End Page: | 26 |
| Citation Issue: | 1 |
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| Citation Language: | English |
| Citation Larger Work Title: | Ecological Applications |
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| Citation Number Of Pages: | 9 |
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| Citation Search Results Text: | Effects of ultraviolet radiation on boreal toads in Colorado; 1998; Article; Journal; Ecological Applications; Corn, P. S. |
| Citation Start Page: | 18 |
| Citation Volume: | 8 |
| Citation Year: | 1998 |
| Type: | citation/reference |
| Text: | Effects of ultraviolet radiation on boreal toads in Colorado; 1998; Article; Journal; Ecological Applications; Corn, P. S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 1998 00:00 -0600 |
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