三峡库区生态系统服务功能重要性评价及其空间分布研究

以长江上游重点生态脆弱区三峡库区(重庆段)为研究区,结合RS和GIS软件,选取生物多样性维护功能、水源涵养功能和水土保持功能为评价指标,采用植被净初级生产力(vegetation net primary productivity,NPP)定量指标评估法,综合分析研究区2020年生态系统服务功能的重要性程度以及空间分异特...

Evaluation and Spatial Distribution of Ecosystem Services in the Three Gorges Reservoir Area

The key ecologically fragile areas of the Yangtze River upstream(Chongqing section)in the Three Gorges Reservoir re⁃gion was taken as the research area,the service functions of biodiversity maintenance,water conservation,and soil and water reten⁃tion were studied based on RS and GIS techniques.And with the NPP quantitative index evaluation method,the importance of eco⁃system services in the study area and their spatial differentiation characteristics was analyzed comprehensively.The results showed that:(1)The importance of biodiversity maintenance function is mainly in the status of general significance,accounting for 43.16%and mainly distributed in the west flat region of the study area;(2)the importance of water conservation function is predominant in the status of significance,accounting for 52.76%,mainly distributed in the parallel range-valley anticline agroforestry zone;(3)the importance of soil and water conservation function is mainly in the status of significance,accounting for 48.65%,and concentrated in the horizontal range-valley zone and the banks of major rivers;(4)the importance of ecosystem services function accounts for 52.43%in the significant status,which is distributed in the transition zone from hills to mountains and the“four mountains”region in the central urban area.