stochastic community dynamics

Gandon S 2002 Local adaptation and the geometry of host–parasite coevolution. Ecol Lett 5:246-256.

• genetic drift may decouple the dynamics of the different populations and counteract the effect of migration
• genetic drift is classically viewed as a factor decreasing the level of local adaptation (Lande 1976)
• in the present coevolutionary model, genetic drift can be a necessary condition for local adaptation because it maintains spatial variations among populations