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Fig. 2 | BMC Evolutionary Biology

Fig. 2

From: Ecological opportunity may facilitate diversification in Palearctic freshwater organisms: a case study on hydrobiid gastropods

Fig. 2

Relationship between elevation and speciation rates in the genera Corrosella and Pseudamnicola. A joint QuaSSE modeling of elevational evolution along the phylogeny and its influence on speciation revealed a decreasing speciation rate in Pseudamnicola with increasing elevation. We calculated the 95% highest posterior density (dashed lines) of speciation rates by Bayesian inference. Vertical ticks on the x-axis indicate elevation of extant species. Note that for model assumptions of normality, we took the square root of elevation. The back-transformation caused the non-linear impression of the plot

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