[目的]为促进棋盘山水库生态系统健康稳定提供参考依据.[方法]基于2021 年棋盘山水库生态环境和渔业资源的调查数据,采用Ecopath with Ecosim软件构建了棋盘山水库生态系统的物质平衡Ecopath 模型,对生态系统的食物网结构、传递效率、营养交互关系和系统总体特征等进行分析.[结果]棋盘山水库食物网中22个功能组的有效营养级数值为1.000～3.419,营养级较高的功能组为肉食性鱼类.能量流动主要有5级,其中来自初级生产者的平均传递效率为3.13%,来自碎屑的平均传递效率为3.39%.系统总生产量为36 268.078 t/(km2·a),总流量为86 057.620 t/(km2·a),联结指数和系统杂食系数分别为0.205、0.142;总初级生产量/总呼吸量、总生物量/总周转量分别为2.106和0.003.[结论]该研究解析了该水库营养结构和系统发育状况,可为棋盘山水库生态环境的可持续利用和科学管理提供理论依据.
The Ecosystem Structure and Functioning of Mount Qipan Reservoir Based on Ecopath Model
[Objective]To provide reference for promoting the health and stability of Mount Qipan Reservoir ecosystem.[Method]Based on the survey data of the ecological environment and fishery resources of Mount Qipan Reservoir in 2021,a material balance Ecopath model of Mount Qipan Reservoir ecological system was constructed by Ecopath with Ecosim software.The food web structure,transfer efficiency,nutrient interaction relationship and overall system characteristics of the ecosystem were analyzed.[Result]The results showed that the effective nutrient levels of 22 functional groups in the food web of Chipanshan Reservoir ranged from 1.000 to 3.419,and the functional group with higher nutri-tional level is carnivorous fish.There are mainly 5 levels of energy flow,in which the average transfer efficiency from primary producers is 3.13%and the average transfer efficiency from debris is 3.39%.The total production of the system is 36 268.078 t/(km2·a),and the total flow is 86 057.620 t/(km2·a),the connection index and systematic omnivorous coefficient are 0.205 and 0.142,respectively.Total primary produc-tion/total respiration and total biomass/total turnover are 2.106 and 0.003,respectively.[Conclusion]The nutritional structure and system de-velopment of the reservoir are analyzed in this paper,it will provide theoretical basis for the sustainable utilization and scientific management of the ecological environment of the reservoir.
国家科技期刊平台
NSTL
万方数据
维普
