FN Archimer Export Format PT J TI Lanthanum anomalies as fingerprints of methanotrophy BT AF Wang, X. Barrat, Jean-Alix Bayon, Germain Chauvaud, Laurent Feng, D. AS 1:1,4;2:2,3;3:4;4:3;5:1; FF 1:;2:;3:PDG-REM-GM-LGS;4:;5:; C1 Shanghai Engineering Research Center of Hadal Science and Technology, College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China Université de Bretagne Occidentale, Brest, CNRS, UMR 6538 (Laboratoire Géosciences Océan), Institut Universitaire Européen de la Mer (IUEM), Place Nicolas Copernic, 29280 Plouzané, France Université de Bretagne Occidentale, Brest, CNRS, UMR 6539 (Laboratoire des Sciences de l’Environnement Marin), LIA BeBEST, Institut Universitaire Européen de la Mer (IUEM), Place Nicolas Copernic, 29280 Plouzané, France IFREMER, Marine Geosciences Unit, F-29280 Plouzané, France C2 UNIV OCEAN CHINA, CHINA UBO, FRANCE UBO, FRANCE IFREMER, FRANCE SI BREST SE PDG-REM-GM-LGS UM LEMAR LGO IN WOS Ifremer UPR WOS Cotutelle UMR DOAJ copubli-france copubli-univ-france copubli-int-hors-europe copubli-sud IF 4.032 TC 22 UR https://archimer.ifremer.fr/doc/00643/75532/76427.pdf https://archimer.ifremer.fr/doc/00643/75532/76428.pdf LA English DT Article AB Methane is an important greenhouse gas whose emissions into the oceans and atmosphere are regulated by relatively unconstrained anaerobic and aerobic microbial processes. The aerobic pathway for methane oxidation is thought to be largely dependent upon the use of rare earth elements (REE), but to date the effects of this process on their abundances in bacteria or in organisms living in symbiosis with methanotrophs remain to be evaluated. Here we show that deep sea chemosynthetic mussels prospering at methane seeps display distinctive lanthanum enrichments linked to the enzymatic activities of their symbionts. These results demonstrate that methanotrophy is able to fractionate efficiently REE distributions in organisms and possibly in the environment. Lanthanum anomalies recorded in ancient sediments are potential chemical fossils that could be used in the geological record for tracking early evidence of microbial life. PY 2020 PD JUN SO Geochemical Perspectives Letters SN 2410-339X PU European Association of Geochemistry VL 14 UT 000553103100001 BP 26 EP 30 DI 10.7185/geochemlet.2019 ID 75532 ER EF