Current Biology - Demographic history and genomic consequences of 10,000 generations of isolation in a wild mammal
In a new study in Current Biology, Xuejing Wang, Stephan Peischl and Gerald Heckel show that common voles (Microtus arvalis) on the Orkney archipelago have remained completely isolated for more than 5000 years. Orkney voles lost most genetic diversity and harbor high levels of putatively strongly deleterious mutations, yet results of computer simulations and the large current population sizes suggest rather mild effects on their fitness. While isolation leads to genetic deterioration, populations may still escape extinction and persist for very long periods of time.