2023年1月JournalofGreenScienceandTechnology第25卷第2期收稿日期:2022-12-01作者简介:林鹏(1996-),男,助理工程师,研究方向为生态学模型。大莲湖生态系统Ecopath模型构建及特征分析林鹏(上海勘测设计研究院有限公司,上海200126)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EcopathwithEcosim(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。关键词:大莲湖;Ecopath模型能量流动;营养结构中图分类号:Q958文献标识码:A文章编号:1674-9944(2023)02-0040-07ConstructionofEcopathModelandCharacteristicsAnalysisoftheEcosystemofDalianLakeLinPeng(ShanghaiInvestigation,Design&ResearchInstituteCo.,Ltd,Shanghai200126,China)Abstract:TakingtheecosysteminDalianhuLakeastheresearchobject,theorganismsweredividedinto25functionalgroups,includingErythroculterilishaeformis,CultererythropterusandCarassiusauratus.TheEcopathwithEcosim(EWE)softwarewasusedtobuildtheEcopathmodeloftheecosystemofDalianhuLake.TheresearchshowsthatthehighesttrophiclevelorganismsintheDalianLakeecosystemisErythroc-ulterilishaeformis,withaneffectivetrophiclevelof3.36.ThetotalenergyTransferefficienciesis8.74%.TheenergyflowmainlyflowsbetweentrophiclevelsIandIV,andthehighestconversionefficiencyoccursbetweentrophiclevelsIVandV(15.0%).TheConnectanceIndex(CI)andtheSystemOmnivoryIndex(SOI)were0.33and0.13,andtheFinn'scycleindex(FCI)andFinn'smeanpathlength(FCL)were14.17%and3.18.Ingeneral,theecosystemoftheDalianhuLakeisvulnerableduetotheimpactofaquaculture.ItissuggestedtoproperlycontroltheaquacultureintensitytomaintainthestabilityoftheecosysteminDalianhuLake.Keywords:DalianhuLake;Ecopathmodel;en...
