11/2/2011 1 Metapopulation Concept Subpopulations of a species connected by dispersal events which facilitate persistence of at risk subpopulations over time either through: recolonization (turnover) rescue Based on two primary ecological/conservation principles/ generalizations: Extinction rates decline with increasing population size. Immigration and recolonization rates decline with increasing isolation Metapopulation Models Each population has a projection matrix Individuals move between populations (dispersal – researcher sets rate based on literature or other knowledge) Matrices can be correlated, degree of correlation related to what metapopulation structure is being considered11/2/2011 2 Metapopulation Models (Stith et al 1996) (Stith et al 1996) Different areas across the range of a single species may exhibit various metapopulation
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