Fig. 2A–DFrom: Epibiota communities of the introduced and indigenous macroalgal relatives Sargassum muticum and Halidrys siliquosa in Limfjorden (Denmark) nMDS plots of dimension 3 versus dimension 2 for all samples collected, and monthly averages for each algal species. A, B square root-transformed data (stress=0.20). C, D presence/absence-transformed data (stress=0.19). S S. muticum, H H. siliquosa Back to article page