摘要
以万州区为例,以2009,2013,2016年土地利用数据为基础,以ArcGIS和Fragstats为软件支撑,综合运用生态风险指数、生态风险动态变化空间分析模型以及地理探测器等多种研究方法,研究了万州区景观结构变化状况、区域生态风险的时空变化状况及其在不同地形下的分布变化状况,为万州区生态环境的改善提出相应的管控措施.结果表明:①2009-2016年万州区潜在风险区面积小幅增加后大面积向低风险区转化,成为转出面积最高的风险区;重风险区则持续转化为中风险区,使得重风险区和中风险区分别成为主要转出和主要转入风险类型,其转出、转入率分别为:0.95%,2.11%,此外,重风险区也是空间变化最为活跃的风险类型;②平原为重风险的主要集聚地带,丘陵以低风险区为主,而山地则是潜在风险区的主要分布带;各个地形下的生态风险指数值从大到小依次为:平原、丘陵、山地.
The change in landscape structure will affect the ecosystem to some extent,andin Wanzhou District,which is a population resettlement region of theThree Gorges,the construction land and traffic land have increased dramatically,which has hada certain effect on the ecological environment of the region.At the same time,due to the complicated geological structure,abundant precipitation,a well-developed river system and poor ecological environment stability,the changes of landscape pattern havehad a profound impact on the ecological environment of the Three Gorges reservoir area.Therefore,in order to discuss the impact of landscape structure changes on eco-systems,Wanzhou District was taken as the research object in this study.By analyzing the spatial and temporal changes of landscape structure and regional ecological risk in Wanzhou District,an array of ecological risk control measures were put forward to improve the ecological environment of Wanzhou District.Based on theland use data for 2009,2013 and 2016 of Wanzhou and supported byArcGIS and Fragstats,the changes in the landscape structure,the temporal and spatial dynamics of ecological risks and the changes in their distribution in different topographies were analyzed withecological risk index,spatial analysis model for dynamics of ecological risks and geographical detectors,and some management measures for improving the ecological environment of the district were proposed.The resultswere as follows.During the study period,the ecological risk pattern of Wanzhou District was basically stable,but the spatial difference was obvious.In general,taking the Yangtze River as the boundary,the distribution of ecological risks was characterized byhigher values in the west and lower values in the east.From 2009 to 2016,the area of risk-free zone transferred to low-risk zone sharply after amoderate growth;and the serious-risk zone transferred to moderate-risk zonecontinuously,while it made serious-and moderate-risk zone become main turning out zone or the main turning in zone,
作者
卿巧玲
黄云
裴婵
QING Qiao-ling;HUANG Yun;PEI Chan(School of Resources and Environment,Southwest University,Chongqing 400715,China)
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2021年第1期174-184,共11页
Journal of Southwest University(Natural Science Edition)
基金
国家自然科学基金重点项目(41530855).
关键词
景观结构
生态风险
地理探测器
地形
万州区
landscape pattern
ecological risk
geographical detectors
terrain
Wanzhou district
