Trophic structure and energy fluxes in a grass carp (Ctenopharyngodon idellus) cultured pond ecosystem
文献类型： 外文期刊
作者： Zhou, Bo 2 ; Dong, Shuanglin 1 ; Wang, Fang 1 ;
作者机构： 1.Ocean Univ China, Coll Fisheries, Key Lab Mariculture, Minist Educ, Qingdao 266003, Peoples R China
2.Sichuan Acad Agr Sci, Fishery Inst, Yibin 644003, Peoples R China
关键词： Ecopath with Ecosim (EwE);Ecotrophic efficiency;Grass carp (Ctenopharyngodon idellus);Mass-balanced model;Trophic structure;Pond ecosystem
期刊名称：AQUACULTURE INTERNATIONAL （ 影响因子：2.235； 五年影响因子：2.616 ）
ISSN：
年卷期：
页码：
收录情况： SCI
摘要： A grass carp (Ctenopharyngodon idellus) cultured pond in east China was described using an Ecopath with Ecosim (EwE) model, aimed at characterizing trophic structure, the interactions among ecological groups and assessing the efficiency of the pond ecosystem. Fifteen functional groups were incorporated into the model (including artificial feed). Values for production, consumption and respiration were compared with the total system throughput. The results indicated that both primary and secondary productivity were not well utilized in the pond ecosystem, resulting in an accumulation of detritus. The maximum trophic level of any functional group in the model was only 3.14. This indicates a short food chain, typical of simple or immature food webs in terms of structure and dynamics. The different size fractions of phytoplankton made different contributions to the system, and larger-sized phytoplankton were easier to eat by organisms at higher trophic levels. The study indicated that introducing a polyculture system would increase the efficiency and outputs from the pond ecosystem.
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