作者
Peter C Trenham, H Bradley Shaffer
发表日期
2005/8
期刊
Ecological Applications
卷号
15
期号
4
页码范围
1158-1168
出版商
Ecological Society of America
简介
To predict the effects of habitat alteration on population size and viability, data describing the landscape‐scale distribution of individuals are needed. Many amphibians breed in wetland habitats and spend the vast majority of their lives in nearby upland habitats. However, for most species, the spatial distribution of individuals in upland habitats is poorly understood. To estimate the upland distribution of subadult and adult California tiger salamanders (Ambystoma californiense), we used a novel trapping approach that allowed us to model the spatial variation in capture rates in the landscape surrounding an isolated breeding pond. As expected, we found that captures of adults declined with distance from the breeding pond. However, captures of subadults increased steadily from 10 to 400 m from the breeding site, but there were no captures at 800 m. A negative exponential function fit to the adult capture data …
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