Kin Competition as a Major Driving Force for Invasions
Kin Competition as a Major Driving Force for Invasions
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DOI：
10.1086/670008
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发表时间：
2013-05-01
影响因子：
2.9
通讯作者：
Hovestadt, Thomas
中科院分区：
文献类型：
--
作者：
Kubisch, Alexander;Fronhofer, Emanuel A.;Hovestadt, Thomas
目前的理论解释说，随着扩散程度的增加，加速入侵是由“空间选择”造成的。在这里，我们认为另一种选择力量，即由于随后的创始人效应而导致的高度关联性的强大亲缘竞争，至少对入侵期间的扩散进化具有类似的重要性。我们用空间结构的种群入侵空白空间的基于个体的模拟来检验这一假设。为了量化KIN竞争对扩散进化的相对贡献，我们对比了两种情景，一种包括KIN效应，另一种不影响空间选择。我们发现，KIN竞争是入侵前沿扩散进化的主要决定因素，特别是在有利于明显的KIN结构的环境条件下(即，小斑块、低环境随机性和高斑块隔离度)。我们论证了近亲竞争的重要性，从而证明了入侵过程中生物对扩散进化的影响。
Current theory explains accelerating invasions with increased levels of dispersal as being caused by "spatial selection." Here we argue that another selective force, strong kin competition resulting from high relatedness due to subsequent founder effects at the expanding margin, is of at least comparable importance for dispersal evolution during invasions. We test this hypothesis with individual-based simulations of a spatially structured population invading empty space. To quantify the relative contribution of kin competition to dispersal evolution, we contrast two scenarios, one including kin effects and one excluding them without influencing spatial selection. We find that kin competition is a major determinant for dispersal evolution at invasion fronts, especially under environmental conditions that favor a pronounced kin structure (i.e., small patches, low environmental stochasticity, and high patch isolation). We demonstrate the importance of kin competition and thus biotic influences on dispersal evolution during invasions.