Evolution of body condition-dependent dispersal in metapopulations
Evolution of body condition-dependent dispersal in metapopulations
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DOI：
10.1111/j.1420-9101.2009.01737.x
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发表时间：
2009-06-01
影响因子：
2.1
通讯作者：
de la Pena, E.
中科院分区：
文献类型：
--
作者：
Bonte, D.;de la Pena, E.
身体条件依赖的散布策略在自然界中是常见的。虽然很明显，环境的限制可能会导致身体状况和扩散之间的正相关关系，但目前尚不清楚是否积极的身体条件扩散策略可能演变为集合种群的策略。我们已经开发了一个基于个人的模拟模型，以探讨如何身体条件扩散反应规范演变的集合种群的特点是不同程度的环境随机性和扩散死亡率。在该模型中，身体状况与繁殖力有关，并由幼年发育期间的环境条件（成年扩散）或母亲经历的环境条件（纳塔尔扩散）决定。进化稳定的反应规范强烈地依赖于集合种群条件：积极的身体条件的扩散依赖性发展在集合种群条件下，低水平的扩散死亡率和高水平的环境随机性。负的身体条件依赖的扩散进化在集合种群高扩散死亡率和低环境随机性。后一种策略是负责较高的扩散率亲属竞争时，传播的决定是基于身体状况达到成年生活阶段。因此，积极和消极的身体条件依赖的扩散策略的演变可能在集合种群，并取决于当时的环境条件。
Body condition-dependent dispersal strategies are common in nature. Although it is obvious that environmental constraints may induce a positive relationship between body condition and dispersal, it is not clear whether positive body conditional dispersal strategies may evolve as a strategy in metapopulations. We have developed an individual-based simulation model to investigate how body condition-dispersal reaction norms evolve in metapopulations that are characterized by different levels of environmental stochasticity and dispersal mortality. In the model, body condition is related to fecundity and determined either by environmental conditions during juvenile development (adult dispersal) or by those experienced by the mother (natal dispersal). Evolutionarily stable reaction norms strongly depend on metapopulation conditions: positive body condition dependency of dispersal evolved in metapopulation conditions with low levels of dispersal mortality and high levels of environmental stochasticity. Negative body condition-dependent dispersal evolved in metapopulations with high dispersal mortality and low environmental stochasticity. The latter strategy is responsible for higher dispersal rates under kin competition when dispersal decisions are based on body condition reached at the adult life stage. The evolution of both positive and negative body condition-dependent dispersal strategies is consequently likely in metapopulations and depends on the prevalent environmental conditions.