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Random walks in the history of life

机译:在生活史上随意漫步

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摘要

The simplest null hypothesis for evolutionary time series is that the observed data follow a random walk. We examined whether aspects of Sepkoski's compilation of marine generic diversity depart from a random walk by using statistical tests from econometrics. Throughout most of the Phanerozoic, the random-walk null hypothesis is not rejected for marine diversity, accumulated origination or accumulated extinction, suggesting that either these variables were correlated with environmental variables that follow a random walk or so many mechanisms were affecting these variables, in different ways, that the resultant trends appear random. The only deviation from this pattern involves rejection of the null hypothesis for roughly the last 75 million years for the diversity and accumulated origination time series.
机译:进化时间序列最简单的零假设是观察到的数据遵循随机游动。我们使用计量经济学的统计检验,检验了塞普科斯基海洋海洋生物多样性汇编的各个方面是否偏离了随机游走。在整个古生代中,随机游走原假设不因海洋多样性,累积的起源或累积的灭绝而被拒绝,这表明这些变量与随机游走后的环境变量相关,或者有许多机制影响这些变量。不同的方式,结果趋势出现随机。唯一偏离这种模式的是,在多样性和累积的始发时间序列的大约7千5百万年中,拒绝了原假设。

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