FN Archimer Export Format PT J TI Polar lipid fatty acids as indicators of trophic associations in a deep-sea vent system community BT AF COLACO, Ana DESBRUYERES, Daniel GUEZENNEC, Jean AS 1:1;2:2;3:3; FF 1:;2:PDG-DOP-DCB-EEP;3:PDG-DOP-DCB-BM-BMM; C1 Univ Azores, Dept Oceanog & Fisheries, IMAR, P-9901862 Horta, Azores, Portugal. IFREMER, Ctr Brest, DEEP Lab Environm Profond, F-29263 Plouzane, France. IFREMER, Ctr Brest, Dept Biotechnol Marines, F-29263 Plouzane, France. C2 UNIV AZORES, PORTUGAL IFREMER, FRANCE IFREMER, FRANCE SI BREST SE PDG-DOP-DCB-EEP PDG-DOP-DCB-BM-BMM IN WOS Ifremer jusqu'en 2018 copubli-europe IF 0.97 TC 38 UR https://archimer.ifremer.fr/doc/2007/publication-2538.pdf LA English DT Article DE ;Mid Atlantic Ridge;biomarkers;hydrothermal vents;fatty acids AB The polar lipid fatty acid (PLFA) profiles of invertebrates living in chemosynthetic communities can indicate the degree to which these animals depend on specific types of bacteria. To identify the nutritional sources of various species from deep-sea hydrothermal vents of the Mid-Atlantic Ridge, a Principal Component Analysis was performed using individual PLFA profiles as descriptors. Two associations representing different feeding groups were identified: (i) mussels, commensal polychaetes and gastropods, (ii) shrimps and crabs. The first association relies more on sulphide-oxidizing bacteria, while the second one has more anaerobic sulphate-reducing bacteria biomarkers. Other small invertebrates reveal different diets. The polychaete Amathys lutzi shows the most diversified bacterial diet, with fatty acid biomarkers from both S-oxidizing and S-reducing bacteria. PY 2007 PD MAR SO Marine Ecology SN 0173-9565 PU Blackwell science VL 28 IS 1 UT 000245546200003 BP 15 EP 24 DI 10.1111/j.1439-0485.2006.00123.x ID 2538 ER EF