Temporal genetic and demographic monitoring of pond-breeding amphibians in three contrasting population systems

摘要: Quantifying the relationship between demographic patterns and genetic diversity are important in predicting temporal population changes. To make predictions there must be an understanding of census size, effective number breeders (Nb) size (Ne). We evaluate variation three populations Ambystoma salamanders, compare estimates Nb Ne. sampled two wetlands, RB GB for A. opacum talpoideum at RB, over a 20-year period. colonized wetland 1980 has steadily expanded as declined towards local extinction; remained relatively large stable this same time Genetic 10 microsatellites each frame, did not reflect changes size. also trends, were lower than Nb. methods determining Ne gave similar to methods. Our findings indicate that sample sizes markers typically used studies do provide enough precision monitor amphibians, which likely violate many assumptions estimation models. These should considered when using conservation management assessments amphibian populations.