Landscape genetics of a recent population extirpation in a burnet moth species

摘要: The intensification of agricultural land use over wide parts Europe has led to the decline semi-natural habitats, such as extensively used meadows, with those that remain often being small and isolated. These rapid changes in during recent decades have strongly affected populations inhabiting these ecosystems. Increasing habitat deterioration declining permeability surrounding landscape matrix disrupt gene flow within metapopulations. burnet moth species Zygaena loti suffered from fragmentation, reflected by its abundance. We studied population genetic structure found a high level diversity some analysed, while others display low lack heterozygosity. was formerly highly abundant meadows along skirts forests. However, is currently restricted isolated remnants, which divergence among (F ST: 0.136). Species distribution modelling well spatial examination panmictic clusters study area support scattered for this species. suggest still represent former interconnected populations, numbers alleles, F IS values, heterozygosity negative effects reduced interconnectivity. A continuous exchange individuals necessary maintain variability. Based on results, we draw general conclusion more common taxa originally large networks suffer stronger sudden fragmentation than specialised lower persisted patches long periods time.