Polar lipid fatty acids as indicators of trophic associations in a deep-sea vent system community
Polar lipid fatty acids as indicators of trophic associations in a deep-sea vent system community
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DOI：
10.1111/j.1439-0485.2006.00123.x
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发表时间：
2007-03-01
影响因子：
1.1
通讯作者：
Guezennec, Jean
中科院分区：
文献类型：
--
作者：
Colaco, Ana;Desbruyeres, Daniel;Guezennec, Jean
生活在化学合成群落中的无脊椎动物的极性脂质脂肪酸（PLFA）谱可以指示这些动物对特定类型细菌的依赖程度。为了确定大西洋中脊深海热液喷口各种物种的营养来源，使用单个PLFA剖面作为描述符进行了主成分分析。确定了代表不同摄食群体的两个协会：（i）贻贝、淡水多毛类和腹足类，（ii）虾和蟹。第一种关联更多地依赖于硫化物氧化细菌，而第二种关联具有更多的厌氧硫酸盐还原细菌生物标志物。其他小型无脊椎动物则有不同的饮食。多毛类Amathys lutzi显示最多样化的细菌饮食，具有来自S-氧化和S-还原细菌的脂肪酸生物标志物。
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.