Figure 2. Sediment TO¹³C distribution in control + food (CF), bioturbator (BT), bio-irrigator (BI) and physical mixing (PM) treatments.

Profiles differed significantly and significant results of pairwise tests of TR within TRxD are indicated by the colour of the bars (cf. Figure 1). Significantly lowest values are marked with “*”. Compare with the original addition of ±400 mg algal ¹³C to the surface of the microcosms at the start of the experiment. Error bars indicate SE.