FN Archimer Export Format PT J TI Export of deep-sea hydrothermal particles, indigenous thermophilic microorganisms and larvae to the surrounding Ocean BT AF LESONGEUR, Francoise BRIAND, Patrick GODFROY, Anne CRASSOUS, Philippe BYRNE, Nathalie KHRIPOUNOFF, Alexis AS 1:1,2,3;2:4;3:1,2,3;4:4;5:2,3;6:4; FF 1:PDG-REM-EEP-LMEE;2:PDG-REM-EEP-LEP;3:PDG-REM-EEP-LMEE;4:PDG-REM-EEP-LEP;5:;6:PDG-REM-EEP-LEP; C1 IFREMER, Ctr Brest, REM EEP, Lab Microbiol Environm Extremes,UMR6197, F-29280 Plouzane, France. CNRS, LM2E, UMR6197, F-29280 Plouzane, France. Univ Bretagne Occidentale, LM2E, UMR6197, Plouzane, France. IFREMER, Ctr Brest, REM EEP, Lab Environm Profond, F-29280 Plouzane, France. C2 IFREMER, FRANCE CNRS, FRANCE UBO, FRANCE IFREMER, FRANCE SI BREST SE PDG-REM-EEP-LMEE PDG-REM-EEP-LEP PDG-DOP-DCB-EEP-LMEE IN WOS Ifremer jusqu'en 2018 copubli-france copubli-univ-france IF 0.797 TC 1 TU Centre national de la recherche scientifique Institut français de recherche pour l'exploitation de la mer Université de Bretagne Occidentale UR https://archimer.ifremer.fr/doc/00230/34111/33046.pdf LA English DT Article CR EXOMAR BO Unknown DE ;Deep-sea hydrothermal vents;Particle flux;Hydrothermal microorganisms;Larvae;Regional index: North Atlantic;Mid-Atlantic Ridge;Azores Triple Junction AB To assess the production and the export of particulate and biological material in deep-sea hydrothermal vents, four moorings with sediment traps and current meters were deployed for 24 days in the Azores Triple Junction (ATJ) region. They were deployed along an axis starting at the base of a hydrothermal vent chimney and ending 1000 m away. The particles sampled at the base of the chimney were characterized by high concentrations in total sulfur (16%) and iron (4%). The particle composition changed drastically with distance from the vent: the sulfur concentration decreased with an increase in clay components. Thermophilic microorganisms were successfully enriched from all the particle samples. Cultured strains were closely related to hydrothermal species, suggesting that viable hydrothermal vent microorganisms can be exported easily from one hydrothermal field to the open ocean. Fauna collected in the trap at the base of the chimney also included the hydrothermal mytilid species Bathymodiolus azoricus (prejuvenile prodissoconch late stage), larval or juvenile polychaetes and two vent gastropod species (Shinkailepas sp. and Phymorhynchus sp.). These organisms were not sampled by the others sediment traps. The most common taxa found in the traps off the vent were polychaetes, euphausiaceans and copepods (harpacticoids, nauplii and calanoids). PY 2014 SO Cahiers De Biologie Marine SN 0007-9723 PU Editions de la station biologique de Roscoff VL 55 IS 4 UT 000343638100004 BP 409 EP 420 ID 34111 ER EF