Fig. 5From: Frequent but asymmetric niche shifts in Bulbophyllum orchids support environmental and climatic instability in Madagascar over Quaternary time scalesTransition probabilities between niche states (A, B, C). The size of the arrows is proportional to the pairwise transition rates (q AB, q BA, q AC, q CA, q CB, q BC) estimated by BayesTraits, whereas the dashed lines indicate transition rates not significantly different from zero (see Table 2)Back to article page