Evolutionary disarmament in interspecific competition
Evolutionary disarmament in interspecific competition
复制标题
种间竞争中的进化裁军
DOI：
10.1098/rspb.2001.1842
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
S. Geritz
中科院分区：
文献类型：
--
作者：
É. Kisdi;S. Geritz
竞争的不对称性，即比竞争者拥有更大的身体或更强的武器的优势，在种内竞争中推动了壮观的进化军备竞赛。类似的不对称性在种间竞争中也有很好的记录，但它们很少导致夸张的特征。在这里，我们表明，两个物种具有显着不同的大小可能会经历平行的共同进化，在相同的生态条件下，一个单一的物种会表现出进化军备竞赛的规模较小。我们表明，裁军发生在一个生态明确的单一共享资源的竞争模型的参数范围广泛，裁军也发生在一个简单的Lotka-Volterra竞争模型。这两个模型的一个关键属性是进化动力学和人口密度之间的相互作用。该机制不依赖于模型的非常具体的特征。因此，渐进裁军可能很普遍，并可能有助于解释为何没有种间军备竞赛。
Competitive asymmetry, which is the advantage of having a larger body or stronger weaponry than a contestant, drives spectacular evolutionary arms races in intraspecific competition. Similar asymmetries are well documented in interspecific competition, yet they seldom lead to exaggerated traits. Here we demonstrate that two species with substantially different size may undergo parallel coevolution towards a smaller size under the same ecological conditions where a single species would exhibit an evolutionary arms race. We show that disarmament occurs for a wide range of parameters in an ecologically explicit model of competition for a single shared resource; disarmament also occurs in a simple Lotka–Volterra competition model. A key property of both models is the interplay between evolutionary dynamics and population density. The mechanism does not rely on very specific features of the model. Thus, evolutionary disarmament may be widespread and may help to explain the lack of interspecific arms races.