Cultural evolution facilitates behavioural adaptation in many species. The pace of cultural evolution can be accelerated by population turnover where newcomers (immigrants or juvenile recruits) introduce adaptive cultural traits into their new group. However, where newcomers are naïve to the challenges of their new group, population turnover could potentially slow the rate of cultural evolution. Here, we model cultural evolution with population turnover and show that even if turnover results in the replacement of experienced individuals with naïve ones, turnover can still accelerate cultural evolution if (a) the rate of social learning is more than twice as fast as the turnover rate and (b) newcomers are more likely to learn socially than behaviourally conservative existing group members. Although population turnover is a relatively simple factor, it is common to all animal societies and variation in the turnover rate may potentially play an important role in explaining variation in the occurrence and rates of adaptive cultural evolution across species.

中文翻译：

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人口流动、行为保守主义和文化进化速度

文化进化促进了许多物种的行为适应。文化进化的步伐可以通过人口流动来加速，其中新来者（移民或青少年新兵）将适应性文化特征引入他们的新群体。然而，如果新来者对新群体的挑战天真无知，人口流动可能会减缓文化进化的速度。在这里，我们用人口更替来模拟文化进化，并表明，即使更替导致有经验的人被幼稚的人取代，如果（a）社会学习的速度是更替率的两倍以上，更替仍然可以加速文化进化(b) 新成员比行为保守的现有群体成员更有可能进行社交学习。尽管种群更替是一个相对简单的因素，但它对所有动物社会来说都是常见的，并且更替率的变化可能在解释跨物种适应性文化进化的发生和速率的变化方面发挥重要作用。