气候变化领域集成服务门户(CCPortal): Water clarity; maternal behavior; and physiology combine to eliminate UV radiation risk to amphibians in a montane landscape

CCPortal

DOI	10.1073/pnas.0912970107
	Water clarity; maternal behavior; and physiology combine to eliminate UV radiation risk to amphibians in a montane landscape
	Palen W.J.; Schindler D.E.
发表日期	2010
ISSN	0027-8424
起始页码	9701
结束页码	9706
卷号	107 期号:21
英文摘要	Increasing UV-B radiation (UV-B; 290-320 nm) due to stratospheric ozone depletion has been a leading explanation for the decline in amphibians for nearly 2 decades. Yet, the likelihood that UV-B can influence amphibians at the large spatial scales relevant to population declines has not yet been evaluated. A key limitation has been in relating results from individual sites to the effect of UV-B for populations distributed across heterogeneous landscapes. We measured critical embryonic exposures to UV-B for two species of montane amphibians with contrasting physiological sensitivities, long-toed salamander (Ambystoma macrodactylum) and Cascades frog (Rana cascadae), at field sites spanning a gradient of UV-B attenuation in water.We then used these experimental results to estimate the proportion of embryos exposed to harmful UV-B across a large number of breeding sites. By combining surveys of the incubation timing, incident UV-B, optical transparency of water, and oviposition depth and light exposure ofembryos at each site,wepresent a comprehensive assessment of the risk posed by UV-B for montane amphibians of the Pacific Northwest. We found that only 1.1% of A. macrodactylum and no R. cascadae embryos across a landscape of breeding sites are exposed to UV-B exceeding lethal levels. These results emphasize that accurately estimating the risk posed by environmental stressors requires placing experimental results in a broader ecological context that accounts for the heterogeneity experienced by populations distributed across natural landscapes.
英文关键词	Amphibian declines; Dissolved organic matter; Oviposition behavior; Risk analysis; Ultraviolet radiation
语种	英语
scopus关键词	Ambystoma; Amphibia; animal experiment; article; breeding; ecotoxicology; egg laying; embryo; environmental exposure; environmental stress; frog; landscape; light exposure; maternal behavior; nonhuman; physiological process; priority journal; radiation exposure; radiation hazard; risk assessment; salamander; species; ultraviolet B radiation; water quality; Altitude; Ambystoma; Animals; Maternal Behavior; Ranidae; Risk Factors; Ultraviolet Rays; Water; Ambystoma macrodactylum; Amphibia; Rana cascadae
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159153
作者单位	Palen, W.J., Earth to Ocean Research Group, Department of Biological Sciences, Simon Fraser University, Burnaby, BC V5A 1S6, Canada; Schindler, D.E., School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA 98195-5020, United States
推荐引用方式 GB/T 7714	Palen W.J.,Schindler D.E.. Water clarity; maternal behavior; and physiology combine to eliminate UV radiation risk to amphibians in a montane landscape[J],2010,107(21).
APA	Palen W.J.,&Schindler D.E..(2010).Water clarity; maternal behavior; and physiology combine to eliminate UV radiation risk to amphibians in a montane landscape.Proceedings of the National Academy of Sciences of the United States of America,107(21).
MLA	Palen W.J.,et al."Water clarity; maternal behavior; and physiology combine to eliminate UV radiation risk to amphibians in a montane landscape".Proceedings of the National Academy of Sciences of the United States of America 107.21(2010).