嵊泗人工鱼礁海区生态系统能量流动模型初探

主要根据从2005年1月开始投放人工鱼礁至11月在嵊泗人工鱼礁海区进行的环境、资源和生态调查资料,应用Ecopath withEcosim(EwE)软件,构建嵊泗人工鱼礁海区生态系统初步能量流动模型。模型由13个功能组构成,每一组都代表在生态系统中具有相似地位的有机体,基本覆盖了嵊泗人工鱼礁海区生态系统能量流动的主要过程。模型分析表明,嵊泗人工鱼礁海区生态系统的能量流动主要以捕食食物链途径为主,各功能组的营养级范围为1.00~4.18。生态网络分析表明,系统的能量流动主要有6级,来自初级生产者的能流效率为13.8%,来自碎屑的转换效率为13.4%,平均能量转换效率为13.6%。

A preliminary approach on the ecosystem model of the artificial reef in Shengsi

Based on the investigation of fishery resources and eco-environment in the artificial reef in Shengsi from January to November 2005,and by using Ecopath with Ecosim(EwE) software,a mass-balance ecopath model of the ecosystem which consists of 13 functional groups(boxes) in the artificial reef was constructed in Shengsi.Each group represents the organisms with similar roles in the food web,and covers the main trophic flow in the ecosystem of the artificial reef in Shengsi.The food web in the ecosystem of the artificial reef in Shengsi was dominated by detrital path.Phytoplankton was the primary producer,and the functional trophic levels ranged from 1.00 to 4.18,with top pelagic feeders occupying the highest trophic level.By using network analysis,the system network was mapped into a linear food chain,and six discrete trophic levels were found,with a mean transfer efficiency of 13.8% from primary producer,and 13.4% from detritus within the ecosystem.