From populations to communities - Dispersal, patches and metapopulation dynamics
3 important questions on From populations to communities - Dispersal, patches and metapopulation dynamics
When does dispersal play an important role?
When populations are fragmented and patchy.
When may populations be small?
Populations may be small if:
- Its habitable sites are small or short-lived or if there are only a few.
- The dispersal distance between habitable sites is great relative to the dispersibility of the species, such that the habitable sites that go extinct are unlikely to be recolonized.
When can a metapopulation persist?
A metapopulation can persist, stably, as a result of the balance between extinctions and recolonizations, even though none of the local subpopulations is stable in its own right.
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