Evolution of cumulative culture for niche construction
Evolution of cumulative culture for niche construction
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DOI：
10.1016/j.jtbi.2019.04.013
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发表时间：
2019-07-07
影响因子：
2
通讯作者：
Ohtsuki, Hisashi
中科院分区：
文献类型：
--
作者：
Kobayashi, Yutaka;Wakano, Joe Yuichiro;Ohtsuki, Hisashi
本文描述了在空间细分的种群中学习和生态位构建共同进化的数学模型，其中文化用于实践生态位构建，并且可以通过几代人积累的微小改进而进化。个体根据遗传决定的策略，将其一生分配给社会学习、个体学习、生态位建设以改善环境和资源开发。协调最优策略（COS）是指使种群均衡繁殖力最大化的分配策略，与自然选择倾向的收敛稳定策略（CSS）相对。对COS和CSS进行了解析推导和比较。结果是，尽管在文化和环境质量方面，高粘性人群的CSS水平可能很高，但它们通常比COS低得多。本文认为，CSS和COS之间的差异源于模型固有的生产者-洗涤者结构。瞬态动力学分析表明，在参数值突然变化后，文化水平和环境质量可能会暂时急剧上升，但由于时间分配策略对新的文化和环境背景的遗传适应，它们最终会下降到较低的值。讨论了研究结果对人类进化的影响。(C) 2019 Elsevier Ltd.版权所有。
A mathematical model of the joint evolution of learning and niche construction in a spatially subdivided population is described, in which culture is used to practice niche construction and can evolve by accumulating small improvements over generations. Individuals allocate their lifetimes to social learning, individual learning, niche construction to improve the environment, and exploitation of resources according to their genetically determined strategies. The coordinated optimal strategy (COS) is defined as the allocation strategy which maximizes the equilibrium fecundity of the population, as opposed to the convergence stable strategy (CSS), which is the strategy favored by natural selection. Both the COS and CSS are analytically derived and compared. It turns out that, although the levels of the CSS in terms of culture and the environmental quality can be high in a highly viscous population, they are in general much lower than those of the COS. It is argued that the discrepancy between the CSS and COS stems from the producer-scrounger structure inherent in the model. Analysis of transient dynamics reveals that the level of culture and the environmental quality may temporarily undergo drastic increases after sudden changes in parameter values, although they eventually drop down to low values due to the genetic adaptation of the time allocation strategy to the new cultural and environmental backgrounds. Implications of the results for human evolution are discussed. (C) 2019 Elsevier Ltd. All rights reserved.