Metapopulation dynamics, abundance, and distribution in a microecosystem
Metapopulation dynamics, abundance, and distribution in a microecosystem
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DOI：
10.1126/science.281.5385.2045
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发表时间：
1998-09-25
期刊：
影响因子：
56.9
通讯作者：
Evans-Freke, I
中科院分区：
文献类型：
--
作者：
Gonzalez, A;Lawton, JH;Evans-Freke, I
自然生态系统景观的实验性破碎化导致栖息在景观中的多物种动物群落中大多数物种的丰富度和分布减少，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程度之间的正向种间关系恶化。然而，当斑块被栖息地走廊连接起来时，移民的“救援效应”阻止了物种数量和分布的下降，并保持了观察到的它们之间的正相关关系。这些结果表明，集合种群动态和景观连通性对于破碎化景观中种群的持续存在具有重要意义。
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.