Pollination Fluctuations Drive Evolutionary Syndromes Linking Dispersal and Mating System
Pollination Fluctuations Drive Evolutionary Syndromes Linking Dispersal and Mating System
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DOI：
10.1086/599303
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发表时间：
2009-07-01
影响因子：
2.9
通讯作者：
Massol, Francois
中科院分区：
文献类型：
--
作者：
Cheptou, Pierre-Olivier;Massol, Francois
在进化生态学中，特别是在植物中，长期以来一直存在着将扩散速度和交配系统联系起来的综合征。一些语言模型假设，自交的能力可能与高度扩散有关，因为完全异交的物种在分散到一个空的目的地时不能繁殖。然而，经验观察未能支持一个明确的趋势，已有报道称高定殖力与高异交有关。在这里，我们建立了一个通用的集合种群模型，当局部花粉限制随时间随机变化时，种子传播和自花授粉的联合进化。在这些假设下，我们研究了扩散系统和交配系统是如何通过选择相互影响的。我们预测存在两个一致的性状综合征：分散的异交者和不分散的(部分)自体。这些理论预期与经典观点相矛盾，并为一个老问题提供了新的线索，使我们能够重新解释经验数据。最后，根据种子传播机制与育种系统关联的经验数据，对我们的预测进行了讨论。
The existence of a syndrome linking dispersal rate and mating system has long been debated in evolutionary ecology, especially in plants. Some verbal models hypothesize that the ability to self-fertilize may be associated with high dispersal, since completely outcrossing species cannot reproduce when they disperse to an empty destination site. However, empirical observations fail to support a clear trend, and an association of high colonizing ability with high outcrossing has been reported. Here we develop a general metapopulation model for the joint evolution of seed dispersal and self-fertilization when local pollen limitation varies stochastically over time. Under these assumptions, we study how dispersal and mating system influence each other through selection. We predict the existence of two consistent syndromes of traits: dispersing outcrossers and nondispersing (partial) selfers. These theoretical expectations contradict the classical view and shed new light on an old problem, allowing us to reinterpret empirical data. Finally, our predictions are discussed in light of empirical data concerning the association of seed dispersal mechanism and breeding system.