Figure 2.

Scores derived from a PCoA applied to the environmental data (A) and the correlation coefficients between the variables and these scores (B). Scores derived from a PCoA applied to the whole biological data (C), passively dispersing species with aquatic adults, PaAq (D), passively dispersing species with terrestrial adults, PaTe (E), and actively dispersing species with terrestrial adults, AcTe (F). I = Iijoki basin, K = Koutajoki basin, T = Tenojoki basin. Environmental variables are referred to using abbreviations of three to four-first letters of the respective variable (conductivity, deciduous tree, macrophytes, shading, velocity, sand, pebble, cobble, boulder), SW = stream width, MD = mean depth.