Polar lipid fatty acids as indicators of trophic associations in a deep-sea vent system community

Type Article
Date 2007-03
Language English
Author(s) Colaco Ana1, Desbruyeres Daniel2, Guezennec Jean3
Affiliation(s) 1 : Univ Azores, Dept Oceanog & Fisheries, IMAR, P-9901862 Horta, Azores, Portugal.
2 : IFREMER, Ctr Brest, DEEP Lab Environm Profond, F-29263 Plouzane, France.
3 : IFREMER, Ctr Brest, Dept Biotechnol Marines, F-29263 Plouzane, France.
Source Marine Ecology (0173-9565) (Blackwell science), 2007-03 , Vol. 28 , N. 1 , P. 15-24
DOI 10.1111/j.1439-0485.2006.00123.x
WOS© Times Cited 37
Keyword(s) Mid Atlantic Ridge, biomarkers, hydrothermal vents, fatty acids
Abstract 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.
Full Text
File Pages Size Access
publication-2538.pdf 25 105 KB Open access
Top of the page