CORRELATED ENVIRONMENTS AND THE PERSISTENCE OF METAPOPULATIONS
CORRELATED ENVIRONMENTS AND THE PERSISTENCE OF METAPOPULATIONS
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DOI：
10.2307/3565613
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发表时间：
1989-11-01
期刊：
影响因子：
3.4
通讯作者：
QUINN, JF
中科院分区：
文献类型：
--
作者：
HARRISON, S;QUINN, JF
许多物种分布成“元种群”，由许多短暂的本地种群组成，分布在部分孤立的栖息地斑块中。元种群模型通常忽略了组成种群的环境条件之间的相关性。使用计算机模拟，研究了灭绝概率中环境相关性对有限元种群持续时间的影响。当亚种群灭绝概率的均值和方差都很高（如0.25）时，种群间的时间环境相关性可以大大缩短亚种群灭绝的平均时间，特别是对于大型亚种群。然而，当灭绝率和/或其方差为低至中等值时，即使种群间灭绝概率完全相关，也可能导致相对较小的全球持续时间减少。
Many species are distributed into "metapopulations", consisting of many ephemeral local populations in partially isolated patches of habitat. Metapopulation models have generally ignored correlation among environmental conditions in constituent populations. The effects of environmental correlation in the probability of extinction on the persistence times of finite metapopulations are examined, using a computer simulation. When the means and variances of the subpopulation extinction probabilities are both high (e.g. 0.25), temporal environmental correlation among populations may greatly reduce the average time to metapopulation extinction, especially for large metapopulations. However, when the extinction rate and/or its variance take on low to moderate values, even complete correlation in probabilities of extinction among populations may lead to relatively little diminution in global persistence time.