ENVB 305 Lecture Notes - Lecture 8: Metapopulation, Propagule
28 Aug 2016
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Document Summary
Metapopulations are populations of populations that considers i and e. The matrix is made up of the area between habitat patches. Probability of persistence: pn = (1 pe)n. Persistence and extinction can happen on local or regional levels df/dt = i-e. General metapopulation model: df/dt = pi(1-f) - pe*f. Equilibrium for f: df/dt = 0 = pi/(pi+pe) pi = i * f pi = (i * f)(1-f) - pe*f. Island-mainland model- mainland is a source of immigrants to islands. Propagule rain- continuous source of migrants can colonize an empty site. Rescue effect- the reduction of probability of extinction when more populations are present in a metapopulation to save other populations. Source-sink dynamics- some populations will be sources of individuals (emigration), while others will be sinks of individuals (immigration)
