对抗性协同进化中的防御复杂性
Defensive complexity in antagonistic coevolution
摘要：
赢得共同进化斗争的一个策略是快速进化。大多数关于宿主-病原体共同进化的文献都集中在这一现象上，并寻找共同进化军备竞赛的证据。另一种在文献中较少考虑的替代策略是阻止对手的快速进化变化。为了研究如何做到这一点，我们构建了一个进化游戏之间的控制器，必须处理信息，和对手，可以篡改这个信息处理。在这个游戏中，一个物种可以通过以一种对手难以操纵的方式处理信息来挫败对手。我们发现，结构的信息处理系统诱导的适应度景观上的对手人口的演变，并需要复杂的处理逻辑，使景观崎岖。利用丰富的文献关于崎岖的景观的进化速度，我们展示了一个物种如何可以减缓对手人口的适应性进化。我们认为，这种类型的防御复杂的脊椎动物适应性免疫系统的一部分，可能是病原体和它们的脊椎动物宿主之间的共同进化动力学的一个重要因素。
英文摘要：
One strategy for winning a coevolutionary struggle is to evolve rapidly. Most of the literature on host-pathogen coevolution focuses on this phenomenon, and looks for consequent evidence of coevolutionary arms races. An alternative strategy, less often considered in the literature, is to deter rapid evolutionary change by the opponent. To study how this can be done, we construct an evolutionary game between a controller that must process information, and an adversary that can tamper with this information processing. In this game, a species can foil its antagonist by processing information in a way that is hard for the antagonist to manipulate. We show that the structure of the information processing system induces a fitness landscape on which the adversary population evolves, and that complex processing logic is required to make that landscape rugged. Drawing on the rich literature concerning rates of evolution on rugged landscapes, we show how a species can slow adaptive evolution in the adversary population. We suggest that this type of defensive complexity on the part of the vertebrate adaptive immune system may be an important element of coevolutionary dynamics between pathogens and their vertebrate hosts.
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