13C label identifies eelgrass (Zostera marina) Carbon in an Alaskan estuarine food web
13C label identifies eelgrass (Zostera marina) Carbon in an Alaskan estuarine food web
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13C 标签标识阿拉斯加河口食物网中的鳗草（Zostera marina）碳
DOI：
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发表时间：
1979
期刊：
影响因子：
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通讯作者：
C. Mcroy
中科院分区：
文献类型：
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作者：
T. McConnaughey;C. Mcroy
阿拉斯加Izembek泻湖的食物网从鳗草（Zostera marina）和浮游植物中吸收大部分碳。这些初级生产者的13 C：12 C比率差异很大，因此可以根据消费者的13 C：12 C比率来估计它们对消费者的贡献。虽然该技术在概念上很简单，但来自其他来源的碳输入和食物网中发生的同位素分馏限制了其精度。然而，同位素数据有助于建立通过社区的主要碳通量和评估的重要性，鳗鱼草碳个别动物。在处理碎屑食物链时特别有用，因为很难直接观察动物的摄食习惯。Izembek社区从鳗草中吸收了大量的碳。碎屑食物链提供了主要的途径，由社区的鳗草碳同化，但食草动物也很重要。鳗草碳对底栖动物的重要性大于对主要依赖浮游植物碳的鳗草表层生物群和鱼类的重要性。
The food web of Izembek Lagoon, Alaska draws most of its carbon from eelgrass (Zostera marina) and phytoplankton. The13C:12C ratios of these primary producers are sufficiently different to enable their contributions to consumers to be estimated from consumer13C:12C ratios. Although the technique is conceptually simple, carbon inputs from other sources and isotope fractionations occurring in the food web limit its precision. Isotopic data nevertheless helps to establish the major carbon fluxes through the community and to assess the importance of eelgrass carbon to individual animals. It is particularly useful when dealing with detritus food chains, where direct observations of animal feeding habits are difficult to make. The Izembek community draws much of its carbon from eelgrass. Detritus food chains provide the major pathway for assimilation of eelgrass carbon by the community, but grazers are also important. Eelgrass carbon is more important to benthic animals than to the eelgrass epibiota and the fishes, which depend mainly on phytoplankton carbon.