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. 2015 Jan 6;18(2):153–163. doi: 10.1111/ele.12395

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© 2015 The Authors. Ecology Letters published by John Wiley & Sons Ltd and CNRS.

This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Type-1 error rates under the random-draw null model for different metrics (symbols). Type-1 error depends on (a) the % of species locally present, (b) trait conservatism (BR = Brownian Random, BC = Brownian Conserved) and dimensionality (c) rates of community turnover (shown as rate of local extinction relative to speciation), (d) the % of species in the local community that have been sampled and (e) the % of the species pool included in the phylogenetic tree. Plots (a, c, d, e) show results under a BR model of trait evolution for 4 trait dimensions. See Methods for details of metrics and Table S2 for parameter values used in simulations. Dashed black line and grey box shows acceptable Type 1 error rates (i.e. < 5%).