Extinction dynamics and the regional persistence of a tree frog metapopulation
Extinction dynamics and the regional persistence of a tree frog metapopulation
复制标题
DOI：
10.1098/rspb.2000.1143
复制
发表时间：
2000-07-07
影响因子：
4.7
通讯作者：
Edenhamn, P
中科院分区：
文献类型：
--
作者：
Carlson, A;Edenhamn, P
集合种群的概念承认地方性隔离是斑块分布种群动态的自然组成部分。然而，如果不平衡，或如果有一个高度的空间同步性的本地同步性，这构成了威胁，并将减少集合种群的持续时间。在这里，我们表明，在一个集合种群网络的378池塘斑块所使用的树蛙（Hyla arborea），即使灭绝是频繁的（平均灭绝概率p（c）= 0.24），他们不构成威胁的集合种群，因为他们是平衡的灭绝（P-c = 0.33）。在任何一年里，都有一种模式，即大种群趋于持续，而小种群则灭绝。与那些持续存在的种群相比，属于灭绝种群的个体总数很小（< 5%）。空间自相关分析表明，没有集群的地方防御。研究的树蛙集合种群由一组较大的，持久的人口与小的人口特征的高营业额动态混合。
The concept of a metapopulation acknowledges local extinctions as a natural part of the dynamics of a patchily distributed population. However, if extinctions are not balanced by recolonizations or if there is a high degree of spatial synchrony of local extinctions, this poses a threat to and will reduce the metapopulation persistence time. Here we show that, in a metapopulation network of 378 pond patches used by the tree frog (Hyla arborea), even though extinctions are frequent (mean extinction probability p(c) = 0.24) they pose no threat to the metapopulation as they are balanced by recolonizations (P-c = 0.33). In any one year there was a pattern of large populations tending to persist while small populations became extinct. The total number of individuals belonging to populations that went extinct was small (< 5%) compared with those populations that persisted. A spatial autocorrelation analysis indicated no clustering of local extinctions. The tree frog metapopulation studied consisted of a set of larger, persistent populations mixed with smaller populations characterized by high turnover dynamics.