Compound-specific isotopic fractionation patterns suggest different carbon metabolisms among Chloroflexus-like bacteria in hot-spring microbial mats.
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.
van der Meer
Marcel T J
MT
Department of Marine Biogeochemistry and Toxicology, Royal Netherlands Institute for Sea Research, 1790 AB Den Burg, Texel, The Netherlands. mmeer@nioz.nl
Schouten
Stefan
S
Sinninghe Damsté
Jaap S
JS
de Leeuw
Jan W
JW
Ward
David M
DM
D018533:Biomass; D002244:Carbon / Q000378:metabolism*; D002245:Carbon Dioxide / Q000378:metabolism; D002247:Carbon Isotopes / Q000378:metabolism*; D041861:Chloroflexus / Q000254:growth & development / Q000378:metabolism*; D002849:Chromatography, Gas; D003470:Culture Media; D000458:Cyanobacteria / Q000254:growth & development / Q000378:metabolism; D005618:Fresh Water / Q000382:microbiology*; D008401:Gas Chromatography-Mass Spectrometry; D006358:Hot Temperature; D050356:Lipid Metabolism; D009005:Monosaccharides / Q000378:metabolism
D002247:Carbon Isotopes; D003470:Culture Media; D009005:Monosaccharides; D002245:Carbon Dioxide; D002244:Carbon