Linking extinction to connectivity and habitat destruction in metapopulation models

Article Abstract:

A single-species metapopulation model introduced in 1969 has been a highly effective tool in demonstrating that increasing migration rates increases the chance of metapopulation persistence. The model is shown to demonstrate that extinction rates in an area may be increased in relation to an increase in movements among the areas where crop pests are found. A broader range of possible behavior may be predicted by enabling connectivity to migration and local extinction rates.

Research, Biological control, Agricultural ecology, Agricultural pests

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Allee effects in metapopulation dynamics

Article Abstract:

The Levins model of metapopulation dynamics was modified to account for Allee effects that may induce a decrease in per capita metapopulation growth rate below the allowable level of patch occupancy. The Allee-like extinction threshold level may thwart an increase in the metapopulation even with abundant habitat and positive projected growth rate. It may also lead to extinction of metapopulation due to unforeseen circumstances, such as disease epidemic or fire.

Models, Analysis, Habitat (Ecology), Habitats, Extinction (Biology), Population biology

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