FN Archimer Export Format
PT J
TI Arsenic and high affinity phosphate uptake gene distribution in shallow submarine hydrothermal sediments
BT 
AF FRU, Ernest Chi
   CALLAC, Nolwenn
   POSTH, Nicole R.
   ARGYRAKI, Ariadne
   LING, Yu-Chen
   IVARSSON, Magnus
   BROMAN, Curt
   KILIAS, Stephanos P.
AS 1:1,2;2:1;3:3,4;4:5;5:2;6:6;7:1;8:5;
FF 1:;2:;3:;4:;5:;6:;7:;8:;
C1 Department of Geological Sciences and Bolin Center for Climate Research, Stockholm University, 106 91, Stockholm, Sweden
   College of Physical Sciences and Engineering, School of Earth and Ocean Sciences, Geobiology Center, Cardiff University, Park Place, Cardiff, Wales, CF10 3AT, UK
   Department of Biology, Nordic Center for Earth Evolution (NordCEE), Campusvej 55, 5230, Odense M, Denmark
   Department of Geosciences & Natural Resource Management, Geology Section, University of Copenhagen, Øster Voldgade 10, 1350, Copenhagen K, Denmark
   Department of Geology and Geoenvironment, National and Kapodistrian University of Athens, Panepistimiopolis Zographou, 157 84, Athens, Greece
   Department of Biology, University of Southern Denmark, Campusvej 55, 5230, Odense M, Denmark
C2 UNIV STOCKHOLM, SWEDEN
   UNIV CARDIFF, UK
   NORDCEE, DENMARK
   UNIV COPENHAGEN, DENMARK
   UNIV ATHENS, GREECE
   UNIV SOUTHERN DENMARK, DENMARK
IF 3.406
TC 10
UR https://archimer.ifremer.fr/doc/00860/97164/106018.pdf
   https://archimer.ifremer.fr/doc/00860/97164/106019.docx
LA English
DT Article
DE ;Arsenic biogeochemistry;Arsenic speciation;Phosphate biogeochemistry;Hydrothermal activity
AB The toxicity of arsenic (As) towards life on Earth is apparent in the dense distribution of genes associated with As detoxification across the tree of life. The ability to defend against As is particularly vital for survival in As-rich shallow submarine hydrothermal ecosystems along the Hellenic Volcanic Arc (HVA), where life is exposed to hydrothermal fluids containing up to 3000 times more As than present in seawater. We propose that the removal of dissolved As and phosphorus (P) by sulfide and Fe(III)(oxyhydr)oxide minerals during sediment-seawater interaction, produces nutrient-deficient porewaters containing<2.0ppb P. The porewater arsenite-As(III) to arsenate-As(V) ratios, combined with sulfide concentration in the sediment and/or porewater, suggest a hydrothermally-induced seafloor redox gradient. This gradient overlaps with changing high affinity phosphate uptake gene abundance. High affinity phosphate uptake and As cycling genes are depleted in the sulfide-rich settings, relative to the more oxidizing habitats where mainly Fe(III)(oxyhydr)oxides are precipitated. In addition, a habitat-wide low As-respiring and As-oxidizing gene content relative to As resistance gene richness, suggests that As detoxification is prioritized over metabolic As cycling in the sediments. Collectively, the data point to redox control on Fe and S mineralization as a decisive factor in the regulation of high affinity phosphate uptake and As cycling gene content in shallow submarine hydrothermal ecosystems along the HVA. 
PY 2018
PD OCT
SO Biogeochemistry
SN 0168-2563
PU Springer
VL 141
IS 1
UT 000447723800003
BP 41
EP 62
DI 10.1007/s10533-018-0500-8
ID 97164
ER

EF