The document summarizes a study examining the relative importance of demographic versus genetic factors in local population extinctions of the pool frog (Rana lessonae) in Sweden. The study used survey and genetic data from 60 pool frog populations over multiple years, analyzing the effects of environmental variables, population size, immigration, and genetic viability on extinction risk. The results suggest that environmental factors like alkalinity, rather than isolation and inbreeding, best explain population extinctions. Conservation efforts should focus on habitat connectivity to support immigration between populations and reduce extinction risk.
1. Extinction and isolation gradients in metapopulations: the case of the pool frog ( Rana lessonae) - Per Sjögren 1991 Chris Asquith
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5. Pool frogs ( Pelophylax lessonae ) All reptile and amphibian species are protected by the Swedish Environmental Protection Agency. It is illegal to kill, injure, collect, or move any of these animals.
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