Genetic Consequences of Fire to Natural Populations

Abstract

Fire plays an important role in many ecosystems worldwide. The implications of fire on population and community dynamics in natural ecosystems have been studied extensively. Nevertheless, the impact of fire on genetic diversity, a crucial component of biodiversity, remains largely under-investigated. We summarize the theoretical expectations on how ecological effects of fire can be translated into genetic impact in natural populations. We formulate predictions on the effect of fire on genetic variance between and within populations, on the change in allelic frequencies and on the spatial genetic structure within populations. We review the empirical evidence for the effect of fire on genetic characteristics of natural populations. Thus far, research on the genetic consequences of fire has been limited to plant populations with a few exceptions of reptile populations. Because the genetic impact of fire is diverse and complex, consideration of simultaneous ecological effects of fire, controlled analyses of p...