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Population dynamics and genetic variation: consequences for the survival of butterflies in a fragmented landscape

Population dynamics and genetic variation: consequences for the survival of butterflies in a fragmented landscape

Future of butterflies in Europe: strategies for survival: 192-203

The genetic consequences of isolation of butterfly populations are examined. Emphasis is placed on the loss of the different forms of genetic variation in small populations due to genetic drift. It is concluded that genetic impoverishment is unlikely to be a principal factor influencing the persistence of most populations of a few hundred individuals even if intermittent short bottlenecks occur. Most extinction events are primarily due to ecological or environmental pressures.

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