摘要
生态型市域是随着我国生态文明建设不断深入而产生的一批以生态输出为己任,支撑区域乃至全国生态安全的重要生态型区域,该类区域景观生态安全格局的构建是协调域内社会经济与生态环境保护的基础。选取典型生态型市域张家口市,基于"源-汇"理论构建景观生态安全格局,划定不同保护重点的五大生态功能区,识别重点生态保护区、重点生态修复区和廊道系统,以此作为保障城市生态安全的基础,逐步形成"点-线-面"三位一体的立体保护体系,同时提出了生态安全格局构建的优先次序,为张家口市生态安全格局分步骤建设提供依据。研究结果表明,张家口市景观生态安全格局重点保护区缺失严重,缺失区域总面积达1555.77 km^2,占生态保护核心区面积的75.60%,重点生态修复区域比例较大,占全区面积的24.27%,生态廊道存在3个主要缺失区域,针对张家口市生态安全格局建设任务艰巨的现状,提出了分步骤建设的构建思路,即优先进行重点生态修复、重点生态保护缺失区域和生态廊道缺失区域建设,针对重点生态修复区域面积比例较大提出了分步修复的优先次序,即水域修复区>林草水修复区>林草修复区>林水修复区>水草修复区>林地修复区>草地修复区,并提出了优先建设冬奥会场及沿途生态廊道的思路,此外,为实现张家口区域生态系统的支撑作用,需在完成重点区域建设的基础上不断扩大生态保护范围。研究为欠发达生态型市域景观生态安全格局构建及生态环境保护体系建设提供了范例。
With the growth of ecological civilization in China,a city in an ecozone takes the ecological protection as the main responsibility and affords the ecological security of the region and even the whole country.The landscape ecological security pattern of this kind of region is the basis for the protection of the social economy and the ecological environment in a coordination domain.This study selected Zhangjiakou,which is a typical ecozone city,as the research area.Based on source-sink theory,five major ecological functional areas with different protection key points were identified to construct the landscape ecological security pattern,while the key ecological protection areas,ecological restoration areas,and corridor system were located,which are the basis for ensuring urban ecological security.With these areas,the three-dimensional protection system,with a'point-line-polygon',were constructed.Additionally,the priority on the structure of ecological security pattern was put forward,which provides the basis for the construction of the ecological security pattern for Zhangjiakou.The results showed that the key protection areas for the landscape ecological security pattern of Zhangjiakou were missing,and the total area of the missing area was 1555.77 km^2,which accounted for 75.60%of the area of the ecological protection core.The proportion of the key ecological restoration area was larger,accounting for 24.27%of the whole area,and there were three main missing areas in the ecological corridor.In addition,to realize the supporting role of the regional ecology of Zhangjiakou,the ecological protection scope should be continuously expanded until the completion of the construction of the key area.This study provides an example of the construction of an ecological security pattern for an underdeveloped eco-city and the construction of an ecological environment protection system.
作者
田雅楠
张梦晗
许荡飞
张圣微
TIAN Yanan;ZHANG Menghan;XU Dangfei;ZHANG Shengwei(College of Water Conservancy and Civil Engineering,Inner Mongolia Agricultural University,Huhhot 010018,China;Key Laboratory of Water Resource Protection and Utilization in Inner Mongolia,Huhhot 010018,China;Forestry work station of Zhangjiakou,Zhangjiakou 075000,China)
出处
《生态学报》
CAS
CSCD
北大核心
2019年第7期2311-2321,共11页
Acta Ecologica Sinica
基金
国家自然科学基金项目(41561044
51779116)
关键词
源-汇景观
生态型市域
生态安全
最小阻力模型
张家口
source-sink landscape
ecological city
ecological security
the minimum cumulative resistance model
Zhangjiakou City
