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PubMed · 11430645

Quantifying passive and driven large-scale evolutionary trends.

S C Wang
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Abstract

I introduce a new statistical method, analysis of skewness, for quantifying large-scale evolutionary trends as a combination of both passive and driven trends. My approach is based on the skewness of subclades within a parent clade. I partition the total skewness of the parent clade into three components: (1) skewness between subclades; (2) skewness within subclades; and (3) skewness due to changes in variance among subclades. The third component corresponds to a new type of passive trend, in which overall skewness of a parent clade is due to greater variability in subclades to the right of the mean. Using this partitioning, I decompose an observed trend into two components: a driven portion and a passive portion. thus quantifying the effect of small-scale dynamics on large-scale behavior of clades. Applications are given to Miocene-Pliocene rodent size and Ordovician brachiopod muscle geometry.

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AnimalsBiological EvolutionBiometryInvertebratesModels, BiologicalMolarMusclesPhylogenyRodentiaSelection, GeneticJournal Article

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BibTeXRIS

S C Wang. 2001. Quantifying passive and driven large-scale evolutionary trends.. https://doi.org/10.1554/0014-3820(2001)055%5B0849%3Aqpadls%5D2.0.co%3B2

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