A stable isotope approach to the eastern Weddell Sea trophic web: focus on benthic amphipods
A stable isotope approach to the eastern Weddell Sea trophic web: focus on benthic amphipods
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DOI：
10.1007/s00300-001-0340-0
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发表时间：
2002-04-01
期刊：
影响因子：
1.7
通讯作者：
Dauby, P
中科院分区：
文献类型：
--
作者：
Nyssen, F;Brey, T;Dauby, P
同位素（C-13/C-12和N-15/N-14）分析属于不同的底栖生物群落在威德尔海东部采样的90种。这项研究的重点是8个片足类物种的同位素组成进行了比较，他们以前描述的各自的肠道内容物。端足类的稳定同位素比值相当准确地对应的营养分类的基础上，肠道内容物和证明其广泛的喂养类型。由于同位素和肠道内容物方法之间的根本区别是饮食研究的时间尺度，每种方法解决。这一巧合表明，随着时间的推移，喂养策略不会发生重大变化。三个层次的食物网所涵盖的八个物种，而不是严格属于一个营养类别，片足类动物显示连续的值从悬浮饲料清道夫。
isotope (C-13/C-12 and N-15/N-14) analyses were performed on 90 species belonging to different benthic communities sampled in the eastern Weddell Sea. The study focused on eight amphipod species whose isotopic composition was compared to their previously described respective gut contents. Amphipod stable isotope ratios correspond fairly accurately to the trophic classification based on gut contents and attest to their wide spectrum of feeding types. Since the fundamental difference between the isotope and the gut content approaches to diet studies is the time scale each method addresses. this coincidence indicates that there would be no significant changes in feeding strategies over time. Three levels of the food web are covered by the eight species and, instead of belonging strictly to one trophic category, amphipods display a continuum of values from the suspension-feeder to scavengers.