基于遥感生态指数的弋阳县生态安全格局构建及优化  

Construction and optimization of the ecological security pattern in Yiyang County based on the remote sensing ecological index

作　　者：吕大伟 蔡海生 张学玲[1,3] 罗海玲[1] 曾珩 张婷[1] LüDa-wei;CAI Hai-sheng;ZHANG Xue-ling;LUO Hai-ling;ZENG Heng;ZHANG Ting(Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province,Jiangxi Agricultural University,Nanchang,Jiangxi 330045,China;Jiangxi Tourism and Commerce Vocational College,Nanchang,Jiangxi 330100,China;Development Research Center of Selenium-rich Agricultural Industry,Jiangxi Agricultural University,Nanchang,Jiangxi 330045,China;Jiangxi Land Consolidation and Rehabilitation Center,Nanchang,Jiangxi 330002,China)

机构地区：[1]江西农业大学江西省鄱阳湖流域农业资源与生态重点实验室,江西南昌330045 [2]江西旅游商贸职业学院,江西南昌330100 [3]江西农业大学富硒农业产业发展研究中心,江西南昌330045 [4]江西省土地开发整理中心,江西南昌330002

出　　处：《农业现代化研究》2021年第3期545-556,共12页Research of Agricultural Modernization

基　　金：国家自然科学基金项目(31660140);江西省十三五社科规划项目(17YJ11);江西省土地开发整理中心项目(9131207800)。

摘　　要：遥感技术以其能够实现大尺度的快速、实时监测优势,被广泛地应用于生态环境领域,成为评价区域生态安全格局的有效手段。为探究研究区生态安全格局现状及其存在的问题,提出更完善的优化设计方案,本文以弋阳县为研究对象,运用遥感生态指数(RSEI)开展生态环境质量评价,并基于多期数据判断生态质量稳定性,选取生态源地;运用最小累积阻力模型和重力模型构成“点-线-面”要素的生态安全格局。研究结果表明:弋阳县2010、2015和2019年RSEI均值分别为0.8203、0.8466和0.7349,呈先上升后下降的变化规律,生态质量处于良好稳定状态。识别出17个生态源地、35条一般廊道、13条关键廊道和46个生态节点,共同构成弋阳县生态安全格局。优化后的生态安全格局新增3个生态源地,总面积为21.40 km^(2);新增10条生态廊道,总长度为137.48 km;新增24个踏脚石斑块以及10处生态节点;依托生态源地、生态廊道等核心要素,形成“一带两区多轴”生态安全战略布局框架。研究结果可为生态功能区的划定、完善提供科学支撑,为构建生态安全格局过程中生态源地的识别方法提供一定的参考价值。With the advantages of large-scale rapid real-time monitoring,the remote sensing technology is widely used in the field of the ecological environment and has become an effective method of evaluating regional ecological security.To explore the current situation and the existing problems of regional ecological security and to provide a more comprehensive optimum design,this paper applies the remote sensing ecological index(RSEI)to evaluate the ecological environment quality and to examine the stability of ecological quality based on a multi-period data of Yiyang Countyand select the ecological source region.In addition,this study also seeks to construct a“point-line-plane”ecological security pattern by the minimum cumulative resistance model(MCR)and the gravity model.Results show that the average RSEI values of Yiyang County in 2010,2015,and 2019 were 0.8203,0.8466,and 0.7349 respectively.The rising and falling pattern shows that the ecological quality was in a good and stable state.This research identified 17ecological source regions,35 general corridors,13 key corridors and 46 ecological nodes,which constitute the ecologicalsecurity pattern of Yiyang County.Three ecological sources were added after the optimization,with a total area of 21.40 km^(2).In addition,10 new ecological corridors were added,with a total length of 137.48 km and 24 stepping-stone patches and 10 ecological nodes were also increased.A strategic layout framework of ecological security for“one belt,two areas and multiple axes”has been formed,based on the core elements like ecological sources,ecological corridors.Results from this research provide some scientific evidences for delineating and improving the ecological function zones and some references for identifying the ecological source regions in the construction of the ecological security pattern.

关 键 词：遥感生态指数 最小累积阻力模型 重力模型 生态安全格局 弋阳县 

分 类 号：X171.4[环境科学与工程—环境科学]