Hybridisation and climate change: brown argus butterflies in Britain (Polyommatus subgenus Aricia)

摘要: Distribution changes brought about by climate change are likely to alter levels of hybridisation between related taxa, and may threaten some species. 2. Nuclear (Tpi) mitochondrial (cytB) DNA sequence data give evidence for introgression two Polyommatus (subgenus Aricia) butterfly species in a 150-200 km wide overlap zone northern England North Wales. A history is evident from the mixture genotypes present within this region: populations contain southern-origin (Polyommatus agestis )m tDNA northern-origin artaxerxes) Tpi alleles, many mixtures alleles. 3. The timing original unknown, but could be immediately post-glacial or much more recent origin. 4. Both now beginning shift northwards, associated with climatic warming. 5. It thus expected that anthropogenic will unleash new spate hybridisation, potentially threatening long-term survival Britain.