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Trophic interactions, ecosystem structure and function in the southern Yellow Sea

文献类型： 外文期刊

作者： Lin Qun 1 ; Jin Xianshi 2 ; Zhang Bo 2 ;

作者机构： 1.Ocean Univ China, Fishery Coll, Qingdao 266003, Peoples R China

2.Chinese Acad Fishery Sci, Key Lab Sustainable Dev Marine Fisheries, Shandong Prov Key Lab Fishery Resources & Ecoenvi, Minist Agr,Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China

关键词： Ecopath;trophic interactions;ecosystem structure;fisheries;the southern Yellow Sea

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： 2013 年 31 卷 1 期

页码：

收录情况： SCI

摘要： The southern Yellow Sea is an important fishing ground, providing abundant fishery resources. However, overfishing and climate change have caused a decline in the resource and damaged the ecosystem. We developed an ecosystem model to analyze the trophic interactions and ecosystem structure and function to guide sustainable development of the ecosystem. A trophic mass-balance model of the southern Yellow Sea during 2000-2001 was constructed using Ecopath with Ecosim software. We defined 22 important functional groups and studied their diet composition. The trophic levels of fish, shrimp, crabs, and cephalopods were between 2.78 and 4.39, and the mean trophic level of the fisheries was 3.24. The trophic flows within the food web occurred primarily in the lower trophic levels. The mean trophic transfer efficiency was 8.1%, of which 7.1% was from primary producers and 9.3% was from detritus within the ecosystem. The transfer efficiency between trophic levels II to III to IV to V to > V was 5.0%, 5.7%, 18.5%, and 19.7%-20.4%, respectively. Of the total flow, phytoplankton contributed 61% and detritus contributed 39%. Fishing is defined as a top predator within the ecosystem, and has a negative impact on most commercial species. Moreover, the ecosystem had a high gross efficiency of the fishery and a high value of primary production required to sustain the fishery. Together, our data suggest there is high fishing pressure in the southern Yellow Sea. Based on analysis of Odum's ecological parameters, this ecosystem was at an immature stage. Our results provide some insights into the structure and development of this ecosystem.

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