REM 311 Chapter Notes - Chapter 6: Switch, Seed Dispersal, Metapopulation
17 Apr 2018
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Chapter 6: metapopulations and spatial structure (part 2) Spatial arrangement of patches: determines dispersal rates & similarity of environmental conditions in patches, habitat quality varies, habitat boundary varies. 6. 2. 2 spatial correlation of environmental variation spatial correlation: similarity of environmental fluctuations in different parts of the population: synchrony of these fluctuations i. e. rainy seasons around the same time, magnitude doesn"t matter. 2 populations with no spatial correlation (independent environment) has low chance of. Both populations going extinct: environmental fluctuation causing the extinction of 1 population doesn"t affect the other. 2 populations with spatial correlation has equal chance of both going extinct: if 1 population goes extinct from an environmental fluctuation, so will the other. Correlation of environment depends on the distance: geographically close populations will have similar environmental patterns, function of distance among habitat patches is modeled in metapopulations. Dispersal among local populations can successfully recolonize other patches at extinction (lowering extinction risks)
