Using a food-web model to assess the trophic structure and energy flows in Daya Bay, China

文献类型： 外文期刊

第一作者： Chen, Zuozhi

作者： Chen, Zuozhi;Xu, Shannan;Qiu, Yongsong;Chen, Zuozhi;Xu, Shannan;Qiu, Yongsong

作者机构：

关键词： Ecopath modeling;Ecosystem structure;Trophic network analysis;Human impacts;Daya Bay

期刊名称：CONTINENTAL SHELF RESEARCH （ 影响因子：2.391； 五年影响因子：2.879 ）

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收录情况： SCI

摘要： Daya Bay, is one of the largest and most important semi-closed bays along the southern coast of China. Due to the favorable geomorphological and climatic conditions, this bay has become an important conservation zone of aquatic germplasm resources in South China Sea. To characterize the trophic structure, ecosystem properties and keystone species, a food-web model for Daya Bay has been developed by the means of a mass-balance approach using the Ecopath with Ecosim software. The mean trophic transfer efficiency for the entire ecosystem as a whole is 10.9% while the trophic level His 5.1%. The primary- and secondary-producers, including phytoplankton, zooplankton and micro-zoobenthos demonstrated the important overall impacts on the rest of the groups based on mixed trophic impact (MIT) analysis and are classified as the keystone groups. The analysis of ecosystem attributes indicated that ecosystem of Daya Bay can be categorized as an immature one and/or is in the degraded stage. A comparison of this model with other coastal ecosystems, including Kuosheng Bay, Tongoy Bay, Beibu Gulf and Cadiz Gulf, underpinned that the ecosystem of Daye Bay is an obviously stressed system and is more vulnerable to the external disturbance. In general, our study indicates that a holistic approach is needed to minimize the impacts of anthropogenic activities to ensure the sustainability of the ecosystem in the future. (C) 2015 Elsevier Ltd. All rights reserved.

分类号： P7

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