摘要
生态系统人类扰动强度是表征人类对地表生态环境影响和作用程度的综合指标,是生态格局风险、环境治理评价等的关键性和基础性内容。基于建设用地面积占总面积百分比构建的指标,定量描述1995年、2015年长江上游的生态系统人类扰动强度整体分布特性及区域差异特征。1995年和2015年人口分布呈现东多西少的特征,人口分布热点集中在区域东部的川渝城市群。将两个时期进行对比,人口数量整体上明显增加,分布更加均衡。人类扰动强度整体上变大了,分布变得更均衡。人口与人类扰动强度的相关性在加大。根据县级单元的人类扰动强度指标及速度指标将长江上游区域分为四个类型:强人类扰动快速型、弱人类扰动快速型、弱人类扰动缓慢型、强人类扰动稳定型,类型划分与地区经济发展特征和地形地貌等密切相关。
The intensity of human disturbance in ecosystem is a comprehensive index representing the impact degree of human on the surface ecological environment,and is the key and basic content in the evaluation of ecological pattern risk and environment governance,and in the red line demarcation of ecological protection.According to the indicators based on the percentage of construction land area in the total area,the overall distribution characteristics and regional differences of human disturbance intensity of the ecosystem in the upper reaches of the Yangtze River in 1995 and 2015 were quantitatively described.The population density was high in the east and low in the west in 1995 and 2015.The hot spots of population distribution were concentrated in the Sichuan-Chongqing city group in the east of the region.The comparision between the two periods show that the overall population had increased significantly and the distribution was more balanced.Similarly the intensity of human activities had increased and the distribution has become more balanced.The correlation between population and human activity intensity was increasing.According to the human activity intensity index and speed index of each county-level unit,the area in the upper reaches of the Yangtze River was divided into four types:strong human activity and fast development type,weak human activity and fast development type,strong human activity and slow development type,and weak human activity and slow development type.Type classification was closely related to the characteristics of regional economic development and natural environment such as topography and geomorphology.
作者
吴凯
顾晋饴
童坤
李凌琪
白乐
WU Kai;GU Jinyi;TONG Kun;LI Lingqi;BAI Le(Yellow River Institute of Hydraulic Research,Yellow River Conservancy Commission,Zhengzhou 450003,China;College of Envi-ronment,Hohai University,Nanjing 210098,China;Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,China)
出处
《三峡生态环境监测》
2020年第4期29-38,共10页
Ecology and Environmental Monitoring of Three Gorges
基金
国家重点研发计划项目(2017YFC0403604,2017YFC0403600,2016YFC0401005,2017YFC0403505)
国家自然科学基金(51479222,51109138)。
关键词
长江上游
生态系统
人类活动
空间分布
建设用地
人口
县域
upper reaches of Yangtze River
ecosystem
human activity
space distribution
construction land
population
county region
