Compound-specific isotopic fractionation patterns suggest different carbon metabolisms among Chloroflexus-like bacteria in hot-spring microbial mats |
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Authors: | van der Meer Marcel T J Schouten Stefan Sinninghe Damsté Jaap S de Leeuw Jan W Ward David M |
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Institution: | Department of Marine Biogeochemistry and Toxicology, Royal Netherlands Institute for Sea Research, 1790 AB Den Burg, Texel, The Netherlands. mmeer@nioz.nl |
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Abstract: | Stable carbon isotope fractionations between dissolved inorganic carbon and lipid biomarkers suggest photoautotrophy by Chloroflexus-like organisms in sulfidic and nonsulfidic Yellowstone hot springs. Where co-occurring, cyanobacteria appear to cross-feed Chloroflexus-like organisms supporting photoheterotrophy as well, although the relatively small 13C fractionation associated with cyanobacterial sugar biosynthesis may sometimes obscure this process. |
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