Minimum viable metapopulation size.

摘要: We define the minimum viable metapopulation (MVM) size as number of interacting local populations necessary for long-term persistence a in balance between extinctions and recolonizations. The amount suitable habitat (MASH) is defined density (or number) patches persistence. Levins's model suggests that MASH can be estimated by fraction empty network which occurs at stochastic steady state. discuss three reasons why this rule thumb likely to give an underestimate, possibly severe MASH: rescue effect, colonization-extinction stochasticity, nonequilibrium (transient) dynamics. assumption metapopulations occur state, common many models, may frequently violated because high rate loss fragmentation landscapes. Scores rare en...