摘要
生态风险评价是山水林田湖草沙生命共同体安全研究的基础。当前不合理的资源开发和低效土地利用导致植被退化、生态系统服务功能弱化、区域生态风险加剧,生命共同体保护和建设面临新挑战。以吕梁山2000年、2010年和2018年3期土地利用动态监测数据为数据源,在ArcGIS、Fragstats及R的支持下构建自然-经济-景观多源评价体系,基于5 km×5 km格网核算19年以来区域植被退化趋势、生态系统服务价值、生态风险指数的时空分异特征及相关性,评价全域生态风险并提出保护建议。结果表明,吕梁山植被覆盖整体增加,植被变化具有显著性,显著区面积占比达84.94%。2000—2010年生态系统服务价值从507.803×10^(8)元增至507.874×10^(8)元,增幅较小,2010—2018年降至499.761×10^(8)元,共减少1.597%,林地、草地、耕地为主要贡献类型。景观生态风险整体呈上升趋势。风险指数与生态系统服务价值成负相关,聚集趋势有所增强。研究旨在为吕梁山更好发挥生态屏障作用,提高该地区风险预警和管控能力提供参考。
Ecological risk assessment is the basis of the study on the life security of mountain,water,forest,field,lake,grass and sand community.At present,unreasonable resource development and inefficient land use lead to vegetation degradation,weakening ecosystem service function and aggravating regional ecological risk.The protection and construction of life community are facing new challenges.Taking the land use dynamic monitoring data of Lyuliang Mountain in 2000,2010 and 2018 as the data source,a multisource evaluation system of nature-economy-landscape was constructed with the support of ArcGIS,Fragstats and R,based on 5 km×5 km grid calculated the temporal and spatial differentiation and correlation of regional vegetation degradation trend,ecosystem service value and ecological risk index since 19 years,evaluated the regional ecological risk and put forward protection suggestions.The results showed that the vegetation cover of Lyuliang Mountain increased as a whole,and the vegetation change was significant.The area of significant area accounted for 84.94%.From 2000 to 2010,the value of ecosystem services increased from 507.803×10^(8) yuan to 507.874×10^(8) yuan,with a small increase,down to 499.761×10^(8) yuan from 2010 to 2018,a total decrease of 1.597%.Forest land,grassland and cultivated land were the main contribution types.The overall landscape ecological risk showed an upward trend.The risk index had a negative correlation with the value of ecosystem services,and the aggregation trend had increased.The purpose of the study is to provide reference for Lyuliang Mountain to better play the role of ecological barrier and improve the ability of risk early warning and management and control in the region.
作者
宋晓静
周淑琴
王勇
荆耀栋
刘立文
王贝贝
SONG Xiao-jing;ZHOU Shu-qin;WANG Yong;JING Yao-dong;LIU Li-wen;WANG Bei-bei(College of Resources and Environment,Shanxi Agricultural University,Taigu 030801,Shanxi,China)
出处
《湖北农业科学》
2022年第5期111-119,共9页
Hubei Agricultural Sciences
基金
山西省软科学研究计划项目(2018041004-1)
山西农业大学科技创新基金项目(2018YJ23)。
关键词
植被退化
生态系统服务价值
生态风险
吕梁山
vegetation degradation
ecosystem service value
ecological risk
Lyuliang Mountain
