Fig. 2 | Heredity

Fig. 2

From: Habitat preference differentiates the Holocene range dynamics but not barrier effects on two sympatric, congeneric trees (Tristaniopsis, Myrtaceae)

Fig. 2

A model of environmental niche occupancy (grey gradient) and availability across the distribution of a Tristaniopsis collina, and b T. laurina. The axes define environmental space in the model, according to the first two principal components that describe variance across twenty-three bioclimatic and seven geomorphological predictor variables. The solid line indicates 100% of available environments and the dashed line shows the 50% most frequent available environments. The environmental niches of the two species differ according to tests of niche equivalency (P = 0.020) and niche similarity (P = 0.099). Tristaniopsis laurina shows greater niche breadth but a smaller core density of occurrences

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