FN Archimer Export Format
PT J
TI Microbial utilization of rare earth elements at cold seeps related to aerobic methane oxidation
BT 
AF Bayon, Germain
   Lemaitre, Nolwenn
   Barrat, Jean-Alix
   Wang, Xudong
   Feng, Dong
   Duperron, Sebastien
AS 1:1;2:2;3:3;4:1,4;5:4;6:5,6;
FF 1:PDG-REM-GM-LGS;2:;3:;4:;5:;6:;
C1 IFREMER, Marine Geosciences Unit, 29280 Plouzané, France
   Institute of Geochemistry and Petrology, Department of Earth Sciences, ETH Zurich, CH-8092 Zurich, Switzerland
   Laboratoire Géosciences Océan, Université de Bretagne Occidentale et Institut Universitaire Européen de la Mer, 29280 Plouzané, France
   Shanghai Engineering Research Center of Hadal Science and Technology, College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China
   Muséum national d'Histoire naturelle–UMR7245 (MNHN CNRS) Mécanismes de Communication et Adaptation des Micro-organismes (MCAM), 75005 Paris, France
   Institut Universitaire de France, Paris, France
C2 IFREMER, FRANCE
   ETH ZURICH, SWITZERLAND
   UBO, FRANCE
   UNIV SHANGHAI OCEAN, CHINA
   MNHN, FRANCE
   INST UNIV FRANCE, FRANCE
SI BREST
SE PDG-REM-GM-LGS
UM LGO
IN WOS Ifremer UPR
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
IF 4.015
TC 19
UR https://archimer.ifremer.fr/doc/00643/75496/76352.pdf
   https://archimer.ifremer.fr/doc/00643/75496/76353.xlsx
LA English
DT Article
CR WACS
BO Pourquoi pas ?
DE ;Tubeworms;Siboglinidae;Lanthanide-dependent bacteria;Metalloenzymes;Methylotrophy;Regab;Authigenic carbonates;Archaean
AB A major breakthrough in the field of rare earth element (REE) geochemistry has been the recent discovery of their utility to microbial life, as essential metalloenzymes catalyzing the oxidation of methanol to formaldehyde. Lanthanide-dependent bacteria are thought to be ubiquitous in marine and terrestrial environments, but direct field evidence of preferential microbial utilization of REE in natural systems is still lacking. In this study, we report on the REE and trace element composition of the tube of a siboglinid worm collected at a methane seep in the Gulf of Guinea; a tube-dwelling annelid that thrives in deep-sea chemosynthetic ecosystems. High-resolution trace element profiles along the chitin tube indicate marked enrichments of lanthanum (La) and cerium (Ce) in its oxic part, resulting in REE distribution patterns that depart significantly from the ambient seawater signature. Combined with various geochemical and microbiological evidence, this observation provides direct support for an active consumption of light-REE at cold seeps, associated with the aerobic microbial oxidation of methane. To further evaluate this hypothesis, we also re-examine the available set of REE data for modern seep carbonates worldwide. While most carbonate concretions at cold seeps generally display REE distribution patterns very similar to those for reduced pore waters in marine sediments, we find that seafloor carbonate pavements composed of aragonite commonly exhibit pronounced light-REE enrichments, as inferred from high shale-normalized La/Gd ratio (>~0.8), interpreted here as possibly reflecting the signature of lanthanide-dependent methanotrophic activity. This finding opens new perspectives for revisiting REE systematics in ancient seep carbonates and other microbialites throughout the Earth's history. In particular, the geochemical imprint of aerobic methane oxidation could be possibly traced using REE in Archaean stromatolites and other archives of Precambrian seawater chemistry, potentially providing new insights into the oxygenation of early Earth's oceans and associated microbiogeochemical processes. 
PY 2020
PD NOV
SO Chemical Geology
SN 0009-2541
PU Elsevier BV
VL 555
UT 000580660000009
DI 10.1016/j.chemgeo.2020.119832
ID 75496
ER

EF