摘要
定量分析重要生态空间建立前后的生态保护成效,对于保障国家生态安全具有重要意义。本文以生态用地为切入点,从时间和空间双重角度,评估了中国重要生态空间构建的生态保护效果,以期能为国土空间分类分区管控提供科学依据。结果表明:①2018年重要生态空间以生态用地为主导,具有良好的生态本底,体现了重要生态空间的发展定位和重要地位;②1980—2018年,重要生态空间内生态用地呈收缩趋势,但面积减少率低于全国平均水平,定量反映了重要生态空间的构建对生态的积极保护成效,总体来说生态用地变化基本处于稳定状态,扩大区域主要分布在退耕还林还草生态保护工程实施区,缩小区域集中在东北平原的粮食主产区和新疆绿洲农业地区,今后要重点加强管控;③3类重要生态空间内部生态保护成效有差异,国家级自然保护区生态用地面积比例最高,生态用地面积减少率最小、减少趋势最不明显、变化最为稳定,生态保护效果最好;④重要生态空间内生态用地面积比例高于周边外部区域,面积减少率低于外部区域,内、外保护成效具有明显梯度差异,说明重要生态空间的构建对生态保护的意义重大。
It is important to quantitatively analyze the effects of protecting important ecological spaces in China to ensure national ecological security.By considering changes in the ecological land,this study examines the effects of protecting three types of important natural ecological spaces in China.The results show that:(1)In 2018,the ratio of ecological land to important natural ecological spaces accounted for 92.64%.This land had a good ecological background that reflects the developmental orientation of important ecological spaces.(2)From 1980 to 2018,the area of ecological land in important ecological spaces shrank but the rate of reduction was lower than the national average,which shows the positive effect of regulating construction in natural ecological spaces.The restorative effects of ecological projects to convert farmland into forests and grasslands have been prominent.The expanded ecological land is mainly distributed in areas where such projects have been implemented,and the reduced area is concentrated in grain-producing regions of the Northeast China Plain and agricultural oases of Xinjiang.In the future,the government should focus on strengthening the management and control of these areas.(3)The area ratio of ecological land was the highest in national nature reserves.The rate of reduction in its area was the lowest and the trend of reduction was the smallest in national nature reserves,which reflects differences in the status of ecological protection among different spaces.(4)The ratio of ecological land to important ecological spaces was higher than that in the surrounding external space,and the rate of reduction in it was lower.Thus,the effects of internal and external protection had clear differences in terms of gradient.
作者
高吉喜
刘晓曼
王超
王勇
付卓
侯鹏
吕娜
GAO Jixi;LIU Xiaoman;WANG Chao;WANG Yong;FU Zhuo;HOU Peng;LYU Na(Ministry of Ecology and Environment Center for Satellite Application on Ecology and Environment,Beijing 100094,China;State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China)
出处
《地理学报》
EI
CSSCI
CSCD
北大核心
2021年第7期1708-1721,共14页
Acta Geographica Sinica
基金
国家重点研发计划(2017YFC0506606,2017YFC0506506,2016YFC0500206)。
关键词
生态空间
生态用地
时空变化
保护成效
分类分区管控
ecological spaces
ecological land
spatial and temporal changes
protection effect
categorized and zoned governance
