Gonzalez A, Lawton JH, Gilbert FS, Blackburn TM, Evans-Freke I
A. Gonzalez, J. H. Lawton, T. M. Blackburn, National Environment Research Council Centre for Population Biology, Silwood Park, Ascot, Berkshire, SL5 7PY, UK. F. S. Gilbert and I. Evans-Freke, School of Biological Sciences, University Park, Nottingh.
Science. 1998 Sep 25;281(5385):2045-7. doi: 10.1126/science.281.5385.2045.
The experimental fragmentation of landscapes of a natural ecosystem resulted in declines in the abundance and distribution of most species in the multispecies animal community inhabiting the landscapes and the extinction of many species. These declines caused the deterioration of the positive interspecific relation between local population abundance and distributional extent in this community. However, when patches were connected by habitat corridors, an immigration "rescue effect" arrested declines in both abundance and distribution and maintained the observed positive relation between them. These results demonstrate the importance of metapopulation dynamics and landscape connectivity for the persistence of populations in fragmented landscapes.
对自然生态系统景观进行实验性分割，导致栖息于这些景观中的多物种动物群落中大多数物种的丰度和分布下降，许多物种灭绝。这些下降导致该群落中当地种群丰度与分布范围之间的种间正相关关系恶化。然而，当斑块通过栖息地走廊相连时，一种迁入“救援效应”阻止了丰度和分布的下降，并维持了二者之间观察到的正相关关系。这些结果证明了集合种群动态和景观连通性对于破碎景观中种群持久性的重要性。
