Fig. 4

Pearson correlation coefficients (color scale) between the grain size, biological, and morphodynamic variables of the dunes. d50: Median grain size. TR: Taxonomic richness, N: Abundance, H’: Shannon index, J’: Pielou’s evenness index. c: Migration rate, λ: spacing between dunes, H: dune height, S: dune surface area, Ls: Stoss side length, Ll: Lee side length, and Qbm: mass bedload transport.