微生物协同进化简单模型中互惠共生的普遍性
Prevalence of mutualism in a simple model of microbial co-evolution
摘要：
生态相互作用之间的进化转变是众所周知的，虽然他们的详细动态仍然缺乏大多数人口模型。适应性动力学已被用来说明人口模型的参数可能会通过演变，但在生态制度。在这里，我们使用自适应动力学结合广义逻辑模型的种群动力学表明，生态相互作用的过渡可能会出现进化的结果。为此，我们引入了一个两个微生物玩具模型，其中人口参数是由簿记的资源采取（和排泄到）的环境，以及从其他物种的副产品。尽管简单，这个模型展示了各种潜在的生态转变，其中一些类似于自然界中发现的。总的来说，该模型显示出互利共生的明显趋势。
英文摘要：
Evolutionary transitions among ecological interactions are widely known, although their detailed dynamics remain absent for most population models. Adaptive dynamics has been used to illustrate how the parameters of population models might shift through evolution, but within an ecological regime. Here we use adaptive dynamics combined with a generalised logistic model of population dynamics to show that transitions of ecological interactions might appear as a consequence of evolution. To this purpose we introduce a two-microbial toy model in which population parameters are determined by a bookkeeping of resources taken from (and excreted to) the environment, as well as from the byproducts of the other species. Despite its simplicity, this model exhibits all kinds of potential ecological transitions, some of which resemble those found in nature. Overall, the model shows a clear trend toward the emergence of mutualism.
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