基于VSD的近20 a来浑善达克沙地生态脆弱性变化研究  

Spatio-temporal patterns variation of ecological vulnerability in Otindag Sandy Land based on a vulnerability scoping diagram

作　　者：陈臻琦 张靖 张贻龙[1] 刘睿 CHEN Zhenqi;ZHANG Jing;ZHANG Yilong;LIU Rui(College of Environment and Resources,Dalian Minzu University,Dalian 116600,Liaoning,China;School of Geography,Liaoning Normal University,Dalian 116029,Liaoning,China)

机构地区：[1]大连民族大学环境与资源学院,辽宁大连116600 [2]辽宁师范大学地理科学学院,辽宁大连116029

出　　处：《干旱区研究》2021年第5期1464-1473,共10页Arid Zone Research

基　　金：国家自然科学基金青年科学基金项目(31500384);大连民族大学2020年大学生创新创业训练计划项目(202012026181);中央高校基本科研业务费专项资金生态学科团队资助项目。

摘　　要：如何协调区域社会经济和人口、资源环境发展,已成为生态环境建设面临的紧迫任务,识别特定地区的脆弱性则是实现有效生态系统管理的前提。以京津风沙源——浑善达克沙地为研究区,采用“暴露-敏感-适应”(VSD)模型建立评价指标体系,结合Moran’s I指数与主成分分析,对2000—2019年该沙地生态脆弱性进行评价和驱动机制分析。结果表明:浑善达克沙地生态脆弱性20 a间呈现增加的趋势;其生态脆弱性空间上呈集聚现象,表现为西部高-高聚集、东部低-低聚集的分布格局,且具有明显的空间相关性;生态脆弱性的时空分布的异质性是由不同程度的人类活动与气候因素的叠加效应造成的。该研究为浑善达克沙地的生态建设和生态恢复提供理论依据,并提出因地制宜的治理建议和措施。The question of how to coordinate social and economic development,population growth,resource consumption,and environmental protection has become an urgent topic for regional sustainability development.Identifying the ecological vulnerability(EV)of specific areas is the precondition to achieving effective ecosystem management for sustainability.However,the driving forces of EV,including climate change,environmental protection policies,and land use,may change over a long period of time,affecting the spatio-temporal patterns of EV.Taking Otindag Sandy Land as the research area,we used the“Vulnerability Scoping Diagram”framework to establish the evaluation index system.Using Moran’s I index and principal component analysis(PCA),we evaluated the spatio-temporal distribution patterns of EV of this sandy land,and we also analyzed its driving mechanism from 2000 to 2019.The findings revealed that:(1)the EV of Otindag Sandy Land has exhibited an increasing trend over the past two decades;(2)the EV of this area presents an agglomeration distribution pattern with obvious spatial auto-correlation on spatial extent,in which the high-high cluster of EV is distributed in the western region,and the low-low cluster of EV is located in the eastern region;(3)the heterogeneity of the temporal and spatial distribution of EV is due to the synergistic effect of human activities and climate factors at different levels.According to the factor loadings matrix of PCA,after 2010 or 2015,the influence of indicators such as the population density,the number of livestock,and the per capita grassland area on the EV of this region has either weakened or been restrained by the implementation of ecological restoration projects and ecological policies.Meanwhile climate factors have gradually highlighted the leading role in driving EV in this region.This study provides a theoretical basis for the ecological construction and ecological restoration of Otindag Sandy Land,and puts forward some suggestions and measures for ecosystem management.At t

关 键 词：生态脆弱性 时空格局 驱动机制 浑善达克沙地 

分 类 号：X171.4[环境科学与工程—环境科学]