Diversity indices (taxon richness, Shannon index, Simpson index and Eveness index) and abundance of all diatom taxa combined and within each guild (high-growth, low-growth, motile, small-sized and large-sized) across the 30 study sites in the River Dalälven catchment.

Means ± standard error (SE) are shown. The abundance of all taxa combined is ∼400 since approximately 400 individuals were identified in each sample (see methods, diatom sampling). Thus, the abundances within guilds are relative abundances (of the total number of identified individuals∼400).