Evolution of cooperative cross-feeding could be less challenging than originally thought.
Evolution of cooperative cross-feeding could be less challenging than originally thought.
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DOI：
10.1371/journal.pone.0014121
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发表时间：
2010-11-29
期刊：
影响因子：
3.7
通讯作者：
Gudelj I
中科院分区：
文献类型：
--
作者：
Estrela S;Gudelj I
互不相关的物种交换营养物质的交叉喂养行为是微生物相互作用的共同特征，可被视为互惠利他主义或互惠合作的一种形式。以往的理论工作表明，合作交叉喂养在性质上的演变可能比其他类型的合作更具挑战性。在这里，我们重新评估了以前用来研究交叉喂养持久性的数学模型，并得出结论，在比以前观察到的更大的参数范围内，维持交叉喂养相互作用是有利的。引人注目的是，我们还发现，大量的交叉喂养者并不一定容易因最初少量的骗子而灭绝，这些骗子获得了交叉喂养的好处，但在这种合作互动中并没有回报。这可以解释在自然种群中观察到的广泛的合作交叉喂养。
The act of cross-feeding whereby unrelated species exchange nutrients is a common feature of microbial interactions and could be considered a form of reciprocal altruism or reciprocal cooperation. Past theoretical work suggests that the evolution of cooperative cross-feeding in nature may be more challenging than for other types of cooperation. Here we re-evaluate a mathematical model used previously to study persistence of cross-feeding and conclude that the maintenance of cross-feeding interactions could be favoured for a larger parameter ranges than formerly observed. Strikingly, we also find that large populations of cross-feeders are not necessarily vulnerable to extinction from an initially small number of cheats who receive the benefit of cross-feeding but do not reciprocate in this cooperative interaction. This could explain the widespread cooperative cross-feeding observed in natural populations.