Compilation of the carbon (a), nitrogen (b), and sulfur (c) isotopic compositions analyzed in this study.

<p>In (a) and (b), yellow, orange, blue, and green shadows represent the expected ranges of the isotopic compositions of thiotroph-CBB, thiotroph-rTCA, methanotroph in CH Sites, photosynthetic organic matter (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0199000#pone.0199000.t003" target="_blank">Table 3</a>). The ranges of methanotroph in CO Sites are not shown. In (c), green shadow represents the expected ranges of the δ³⁴S values of photosynthetic organic matter and methanotroph (δ³⁴S_sulfate) and yellow shadows with red and blue lines, respectively, represent the δ³⁴S values of thiotrophs (δ³⁴S_sulfide) in CO and CH Sites.