Kiesecker J M, Blaustein A R
Department of Zoology, Oregon State University, Corvallis 97331-2914, USA.
Proc Natl Acad Sci U S A. 1995 Nov 21;92(24):11049-52. doi: 10.1073/pnas.92.24.11049.
Previous research has shown that amphibians have differential sensitivity to ultraviolet-B (UV-B) radiation. In some species, ambient levels of UV-B radiation cause embryonic mortality in nature. The detrimental effects of UV-B alone or with other agents may ultimately affect amphibians at the population level. Here, we experimentally demonstrate a synergistic effect between UV-B radiation and a pathogenic fungus in the field that increases the mortality of amphibian embryos compared with either factor alone. Studies investigating single factors for causes of amphibian egg mortality or population declines may not reveal the complex factors involved in declines.
先前的研究表明，两栖动物对紫外线B（UV-B）辐射具有不同的敏感性。在一些物种中，环境中的UV-B辐射水平会导致自然界中的胚胎死亡。单独的UV-B或与其他因素共同作用产生的有害影响最终可能会在种群水平上影响两栖动物。在此，我们通过实验证明了在野外UV-B辐射与一种致病真菌之间存在协同效应，与单独的任何一个因素相比，这种协同效应会增加两栖动物胚胎的死亡率。研究两栖动物卵死亡或种群数量下降原因的单一因素的研究可能无法揭示导致种群数量下降的复杂因素。
