TURNOVER RATES IN INSULAR BIOGEOGRAPHY - EFFECT OF IMMIGRATION ON EXTINCTION
TURNOVER RATES IN INSULAR BIOGEOGRAPHY - EFFECT OF IMMIGRATION ON EXTINCTION
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DOI：
10.2307/1935620
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发表时间：
1977-01-01
期刊：
影响因子：
4.8
通讯作者：
KODRICBROWN, A
中科院分区：
文献类型：
--
作者：
BROWN, JH;KODRICBROWN, A
同种外来移民在种群数量和基因方面的贡献往往会降低岛屿种群的灭绝率。麦克阿瑟 - 威尔逊岛屿生物地理学模型经过修正后考虑到了这种移民对灭绝的影响，这被称为救援效应。这个新模型预测，当移民率相对于灭绝率较高时，周转率与岛屿和物种迁入源之间的距离直接相关。一项关于节肢动物在孤立植物间分布的实地研究支持了该模型。
Demographic and genetic contributions from conspecific immigrants tend to reduce extinction rates of insular populations. The MacArthur-Wilson model of island biogeography is modified to provide for this effect of immigration on extinction, which is called the rescue effect. This new model predicts that when immigration rates are high relative to extinction rates, turnover rate is directly related to the distance between an island and the source of colonizing species. A field study of the distribution of arthropods among isolated plants supports the model.