Truth or Consequences: Effects of Phylogenetic Accuracy on Two Comparative Methods
Truth or Consequences: Effects of Phylogenetic Accuracy on Two Comparative Methods
复制标题
真相还是后果：系统发育准确性对两种比较方法的影响
DOI：
10.1006/jtbi.1994.1071
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发表时间：
1994
影响因子：
2
通讯作者：
H. Luh
中科院分区：
文献类型：
--
作者：
A. Purvis;J. L. Gittleman;H. Luh
物种不能被视为独立的分析点，这一观点彻底改变了比较生物学。生物学家现在面临着在几种新的程序中选择，以消除系统发育的非独立性。本文比较了两种截然不同的新方法，一种是独立对比法，另一种是基于系统发育自相关的方法。我们讨论了当系统发育的拓扑结构和分支长度完全已知时的性能问题，以及这两种方法如何应对不完全解决的树和不正确的分支长度信息-这是比较生物学家常见的情况。仿真表明，当分支长度已知时，无论拓扑结构是否完全已知，独立对比都是有效的。系统发育自相关的I型错误率更高，特别是当拓扑结构只是非常不完全地了解时。不正确的分支长度对独立对比的影响比系统发育自相关性更不利。我们讨论了结果如何反映两种方法的不同假设，并强调了评估真实数据与用于分析它们的方法的内部假设的匹配程度的重要性。
Abstract The insight that species cannot be treated as independent points for analysis has revolutionized comparative biology. Biologists now face choices among several new procedures for removing phylogenetic non-independence from their data. This paper compares two very different new methods, one an independent contrasts approach, the other based on phylogenetic autocorrelation. We discuss issues of performance when the topology and branch lengths of the phylogeny are known in full, and how the two approaches stand up to incompletely resolved trees and incorrect branch length information—common situations for comparative biologists. Simulations show independent contrasts to be valid when branch lengths are known, whether or not the topology is known fully. Type I error rates are higher for phylogenetic autocorrelation, especially when the topology is known only very incompletely. Incorrect branch lengths affect independent contrasts more adversely than phylogenetic autocorrelation. We discuss how the results reflect the different assumptions of the two methods, and stress the importance of assessing how well real data fit the internal assumptions of methods used to analyse them.