population expansion

Lanfear R, Kokko H & Eyre-walker A 2014 Population size and the rate of evolution. TREE 29:33-41.

• the neutral substitution rate is not equal to the mutation rate in situations where there are overlapping generations and fluctuating population size
• it seems likely that the reported effect is in fact due to changes in the mutation rate induced by changes in the generation time when populations expand or contract