Metapopulation persistence in dynamic landscapes: the role of dispersal distance
Metapopulation persistence in dynamic landscapes: the role of dispersal distance
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DOI：
10.1034/j.1600-0706.2002.980208.x
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发表时间：
2002-08-01
期刊：
影响因子：
3.4
通讯作者：
Eber, S
中科院分区：
文献类型：
--
作者：
Johst, K;Brandl, R;Eber, S
与短暂栖息地相关的物种需要有效的扩散策略，以确保其区域生存。使用一个空间上明确的集合种群模型，我们研究了作为当地人口和景观动态（包括栖息地斑块破坏和随后的再生）的函数的集合种群的持久性的扩散范围的影响。我们的研究结果表明，扩散范围的影响取决于当地人口和斑块的增长。这是由于扩散和斑块和种群的动态之间的相互作用，通过潜在的扩散器的数量。在一般情况下，长距离扩散有一个积极的影响，在动态景观的持久性相比，短距离扩散。长距离扩散增加了斑块之间的耦合数量，从而增加了再生斑块的殖民化。然而，远距离扩散失去了长期持久性的优势时，潜在的扩散者的数量是低的，由于小的人口增长率和/或小补丁的增长率。其优势也消失了复杂的当地人口动态和景观与丛生斑块分布。
Species associated with transient habitats need efficient dispersal strategies to ensure their regional survival. Using a spatially explicit metapopulation model, we studied the effect of the dispersal range on the persistence of a metapopulation as a function of the local population and landscape dynamics (including habitat patch destruction and subsequent regeneration). Our results show that the impact of the dispersal range depends on both the local population and patch growth. This is due to interactions between dispersal and the dynamics of patches and populations via the number of potential dispersers. In general, long-range dispersal had a positive effect on persistence in a dynamic landscape compared to short-range dispersal. Long-range dispersal increases the number of couplings between the patches and thus the colonisation of regenerated patches. However, long-range dispersal lost its advantage for long-term persistence when the number of potential dispersers was low due to small population growth rates and/or small patch growth rates. Its advantage also disappeared with complex local population dynamics and in a landscape with clumped patch distribution.