Is horizontal transmission really a problem for phylogenetic comparative methods? A simulation study using continuous cultural traits
Is horizontal transmission really a problem for phylogenetic comparative methods? A simulation study using continuous cultural traits
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DOI：
10.1098/rstb.2010.0014
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发表时间：
2010-12-12
影响因子：
6.3
通讯作者：
Mace, Ruth
中科院分区：
文献类型：
--
作者：
Currie, Thomas E.;Greenhill, Simon J.;Mace, Ruth
系统发育比较方法(PCM)为检验关于文化进化的假说提供了一个潜在的强大工具包。在这里，我们建立在以前的模拟工作的基础上，评估文化之间的水平传播对系统发生和非系统发生方法做出关于性状进化的推断的能力的影响。我们发现，性状的水平传递方式对这两种方法都有重要的影响。在性状分别水平传递的情况下，即使在水平传递的最高水平上，当性状进化不相关时，PCM也能准确地报告。相比之下，线性回归分析往往错误地得出性状相关的结论。在模拟的性状进化不相关，而性状作为一对水平传递的情况下，两种方法都推断出正相关程度随着水平传递的增加而增加。在模拟性状进化相关的情况下，单独水平传递率的增加导致两种方法的推断相关性水平降低，但成对水平传递率的增加不会。此外，PCM还能够对性状的祖先状态做出准确的推断。这些结果表明，在一定条件下，相变调制对水平传输的影响具有较强的稳健性。我们讨论了未来工作可以研究文化特征水平传播的模式和节奏的方法。
Phylogenetic comparative methods (PCMs) provide a potentially powerful toolkit for testing hypotheses about cultural evolution. Here, we build on previous simulation work to assess the effect horizontal transmission between cultures has on the ability of both phylogenetic and non-phylogenetic methods to make inferences about trait evolution. We found that the mode of horizontal transmission of traits has important consequences for both methods. Where traits were horizontally transmitted separately, PCMs accurately reported when trait evolution was not correlated even at the highest levels of horizontal transmission. By contrast, linear regression analyses often incorrectly concluded that traits were correlated. Where simulated trait evolution was not correlated and traits were horizontally transmitted as a pair, both methods inferred increased levels of positive correlation with increasing horizontal transmission. Where simulated trait evolution was correlated, increasing rates of separate horizontal transmission led to decreasing levels of inferred correlation for both methods, but increasing rates of paired horizontal transmission did not. Furthermore, the PCM was also able to make accurate inferences about the ancestral state of traits. These results suggest that under certain conditions, PCMs can be robust to the effects of horizontal transmission. We discuss ways that future work can investigate the mode and tempo of horizontal transmission of cultural traits.