Stable carbon isotope analysis of the incorporation of 13C-labeled bicarbonate by the epibiotic microbial community on S. crosnieri setae.

*δ13C values were measured in triplicate and were expressed as the mean ± SD.**The 13C enrichment E (%) was calculated using the following equation: E = (Fsample/Fcontrol − 1) ×100 (%). Fsample and Fcontrol represent the isotopic abundance of 13C atoms of the epibionts before and after 13C labeling [F = (13C/12C)/(1+13C/12C)].