Stable isotopes in aquatic food web of an artificial lagoon in the Hangzhou Bay, China

文献类型： 外文期刊

第一作者： Quan Weimin

作者： Quan Weimin;Shi Liyan;Chen Yaqu

作者机构：

关键词： isotope;(13)C;(15)N;IsoSource model;trophic level;food web

期刊名称：CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY （ 影响因子：1.068； 五年影响因子：0.983 ）

ISSN： 0254-4059

年卷期： 2010 年 28 卷 3 期

页码：

收录情况： SCI

摘要： Stable isotope values, delta(13)C and delta(15)N, were determined for four primary producers and 19 dominant consumers in a small artificial lagoon located in Hangzhou Bay. Based on these results the major pathways for energy flow and trophic structure of the artificial lagoon ecosystem were characterized. The mean delta(13)C values for the 19 consumers ranged from -22.99% to -14.24%. Apart from so-iny mullet Liza haematocheila, the other 18 consumers had intermediate delta(13)C values between those of epibenthic microalgae and particulate organic matter (POM). The results of a multiple source linear mixing model (IsoSource model) indicated that 50% or more of the organic carbon in the tissues of most consumers was derived from epibenthic microalgae. This indicated that these primary producers were the main food source fueling the lagoon food web. The mean delta(15)N values for the 19 consumers varied between 4.93% and 12.97% and indicated four trophic levels in the lagoon. Four macroinvertebrates and zooplankton represented the primary consumers, whilst the other 14 consumers occupied the secondary and tertiary consumer levels. The 19 consumers were divided into three trophic guilds (detritivores/suspension feeders, omnivores and carnivores).

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