大莲湖生态系统Ecopath模型构建及特征分析  

Construction of Ecopath Model and Characteristics Analysis of the Ecosystem of Dalian Lake

作　　者：林鹏 Lin Peng(Shanghai Investigation,Design&Research Institute Co.,Ltd,Shanghai 200126,China)

机构地区：[1]上海勘测设计研究院有限公司,上海200126

出　　处：《绿色科技》2023年第2期40-46,共7页Journal of Green Science and Technology

摘　　要：以大莲湖生态系统为研究对象,将生物分为翘嘴红鲌、红鳍鲌、鲫等25个功能组,运用Ecopath with Ecosim(EWE)软件,构建了大莲湖生态系统的Ecopath模型。研究结果表明:大莲湖生态系统种营养级最高的生物为翘嘴红鲌、蒙古红鲌,有效营养级3.36。系统的总能量转换效率为8.74%,能流主要在营养级Ⅰ到Ⅳ之间流动,转化效率最高发生在第Ⅳ和第Ⅴ营养级之间(15.0%)。生态系统总体特征参数连接指数(CI)和系统杂食性指数(SOI)分别为0.33和0.13,Finn's循环指数(FCI)和Finn's循环平均能流路径长度(FCL)14.17%和3.18%。总体来看,大莲湖生态系统受渔业养殖影响,生态系统较脆弱,为此,提出了建议:适当控制养殖强度,以维护大莲湖湖泊生态系统稳定。Taking the ecosystem in Dalianhu Lake as the research object,the organisms were divided into 25 functional groups,including Erythroculter ilishaeformis,Culter erythropterus and Carassius auratus.The Ecopath with Ecosim(EWE)software was used to build the Ecopath model of the ecosystem of Dalianhu Lake.The research shows that the highest trophic level organisms in the Dalian Lake ecosystem is Erythroculter ilishaeformis,with an effective trophic level of 3.36.The total energy Transfer efficiencies is 8.74%.The energy flow mainly flows between trophic levels I and IV,and the highest conversion efficiency occurs between trophic levels IV and V(15.0%).The Connectance Index(CI)and the System Omnivory Index(SOI)were 0.33 and 0.13,and the Finn's cycle index(FCI)and Finn's mean path length(FCL)were 14.17%and 3.18.In general,the ecosystem of the Dalianhu Lake is vulnerable due to the impact of aquaculture.It is suggested to properly control the aquaculture intensity to maintain the stability of the ecosystem in Dalianhu Lake.

关 键 词：大莲湖 Ecopath模型能量流动 营养结构 

分 类 号：Q958[生物学—动物学]