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. 2019 Jan 25;14(1):e0210101. doi: 10.1371/journal.pone.0210101

Fig 1. The distribution of phenotypes simulated according to the Brownian motion model of evolution (“Brown”).

Fig 1

This same Brownian motion phenotypic vector is transformed by applying to it a trend for increasing phenotypic evolutionary rate towards the present (“Trend”) or increasing its phenotypic mean towards the present (“Drift”).