Fig. 4: Metabolic rates of freshwater benthic bacterial communities across 31 carbon sources under ambient (A; green bars), elevated nutrients (N; yellow bars), elevated salinity (S; blue bars) and combined elevated salinity and elevated nutrients (SN; purple bars) treatments, 1, 7 and 30 days after tiles with established microbial communities were deployed in the treated ponds (data are means ± SE, n = 4).

A Maximum slope of OD590 values across all carbon sources; B mean slope of OD590 values across all carbon sources. Letters indicate significant pairwise comparisons (alpha = 0.05) within Day groups.