FN Archimer Export Format
PT J
TI Modes of carbon fixation in an arsenic and CO2-rich shallow hydrothermal ecosystem
BT 
AF CALLAC, Nolwenn
   POSTH, Nicole R.
   RATTRAY, Jayne E.
   YAMOAH, Kweku K. Y.
   WIECH, Alan
   IVARSSON, Magnus
   HEMMINGSSON, Christoffer
   KILIAS, Stephanos P.
   ARGYRAKI, Ariadne
   BROMAN, Curt
   SKOGBY, Henrik
   SMITTENBERG, Rienk H.
   FRU, Ernest Chi
AS 1:1;2:2,7;3:1;4:1;5:1;6:3;7:1;8:4;9:4;10:1;11:5;12:1;13:1,6;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;
C1 Stockholm University, Department of Geological Sciences and Bolin Centre for Climate Research, SE-106 91, Stockholm, Sweden
   Nordcee, Department of Biology-University of Southern Denmark Campusvej 55, 5230, Odense M, Denmark
   Department of Palaeobiology and Nordic Center for Earth Evolution, Swedish Museum of Natural History, Stockholm, Sweden
   Department of Geology and Geoenvironment, Section of Economic Geology and Geochemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Zographou, 157 84, Athens, Greece
   Department of Geosciences, Swedish Museum of Natural History, Stockholm, Sweden
   School of Earth and Ocean Sciences, Cardiff University, Park Place, Cardiff, CF10 3AT, United Kingdom
   Department of Geosciences and Natural Resource Management – IGN University of Copenhagen, Øster Voldgade, 10 1350, København K, Denmark
C2 UNIV STOCKHOLM, SWEDEN
   UNIV SOUTHERN DENMARK, DENMARK
   MNH SWEDEN, SWEDEN
   UNIV ATHENS, GREECE
   MNH SWEDEN, SWEDEN
   UNIV CARDIFF, UK
   UNIV COPENHAGEN, DENMARK
IN DOAJ
IF 4.122
TC 8
UR https://archimer.ifremer.fr/doc/00860/97163/106025.pdf
   https://archimer.ifremer.fr/doc/00860/97163/106026.pdf
LA English
DT Article
AB The seafloor sediments of Spathi Bay, Milos Island, Greece, are part of the largest arsenic-CO2-rich shallow submarine hydrothermal ecosystem on Earth. Here, white and brown deposits cap chemically distinct sediments with varying hydrothermal influence. All sediments contain abundant genes for autotrophic carbon fixation used in the Calvin-Benson-Bassham (CBB) and reverse tricaboxylic acid (rTCA) cycles. Both forms of RuBisCO, together with ATP citrate lyase genes in the rTCA cycle, increase with distance from the active hydrothermal centres and decrease with sediment depth. Clustering of RuBisCO Form II with a highly prevalent Zetaproteobacteria 16S rRNA gene density infers that ironoxidizing bacteria contribute significantly to the sediment CBB cycle gene content. Three clusters form from different microbial guilds, each one encompassing one gene involved in CO2 fixation, aside from sulfate reduction. Our study suggests that the microbially mediated CBB cycle drives carbon fixation in the Spathi Bay sediments that are characterized by diffuse hydrothermal activity, high CO2, As emissions and chemically reduced fluids. This study highlights the breadth of conditions influencing the biogeochemistry in shallow CO2-rich hydrothermal systems and the importance of coupling highly specific process indicators to elucidate the complexity of carbon cycling in these ecosystems. 
PY 2017
PD OCT
SO Scientific Reports
SN 2045-2322
PU Nature Publishing Group
VL 7
UT 000414231800005
DI 10.1038/s41598-017-13910-2
ID 97163
ER

EF