Fig. 5: Predicted distribution probability in logistic values is shown for each 30 arc‐sec pixel based on the ecological niche model for D. bifida.

a at present (0 kya), b at the Holocene Climatic Optimum (6 kya, CCSM4.0), at the last glacial maximum (LGM 21 kya; c CCSM4.0 and d MIROC3.2). Logistic values over a threshold of maximum sensitivity plus specificity are represented using heat colours. The distribution records of D. bifida at present are superimposed as grey points in the LGM maps. Palaeo-rivers during the LGM are illustrated by pale-blue lines.