BIOL 313 Lecture Notes - Lecture 15: Metapopulation, Natural Disaster
10 Feb 2018
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Document Summary
Suitable habitat is in discrete patches that are occupied by breeding populations. Even the largest patch has a risk of extinction. Habitat patches are not too isolated to prevent recolonization. Previously, we assumed that populations were closed. Now, we start to look at meta-populations and the connections between local subpopulations. Movements (dispersal) from one population to another become important. Now we can consider two different spatial scales. The fundamental idea of metapopulation persistence is a dynamic balance between the extinction of local populations and recolonizaiton of empty habitat. Colonization is the movement (dispersal) of individuals from occupied sites to unoccupied sites to form a new local population (of the same species) P is the fraction of patches occupied in a metapopulation (ranges from 0-1) P = fraction of occupied patches (ranges from 0-1) C = proportion of sites successfully colonized over time. E = proportion of sites that go extinct over time.
