基于景观格局的生态风险时空变化规律——以林甸县为例  

Spatio-temporal dynamics of ecological risk based on landscape pattern——A case study of Lindian County

作　　者：王婷婷[1] 李继红[1] WANG Tingting;LI Jihong(College of Forestry,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学林学院,黑龙江哈尔滨150040

出　　处：《辽宁林业科技》2024年第2期19-24,共6页Liaoning Forestry Science and Technology

摘　　要：为探究大庆市林甸县的景观格局演变对景观生态风险的影响,该文以5期(2000年、2010年、2015年、2018年和2020年)遥感影像为数据基础,综合分析2000-2020年林甸县的生态风险等级分布。结果表明:耕地和草地为林甸县主要的景观类型,与其他景观类型转入、转出频繁,呈聚集性分布。研究区以低风险及较低风险区域为主,较高风险及高风险区主要集中在西部的沼泽地、盐碱地和东部的草地。各时期景观生态风险Moran's I指数大于0,反映出研究区景观生态风险值的空间分布呈正向相关关系。The impact of landscape pattern evolution on landscape ecological risk in Lindian County,Daqing City was investigated by comprehensively analyzing the distribution of ecological risk classes from 2000 to 2020 using five periods of remote sensing images(2000,2010,2015,2018 and 2020)as the database.The results show that:cropland and grassland constituted the primary landscape types in Lindian County,experiencing frequent transitions with other landscape types and exhibiting a clustered distribution pattern.The study area is dominated by low-risk and lower-risk areas,while higher-risk and high-risk areas are mainly concentrated in marshlands and saline-alkali soils in the west,as well as grasslands in the east.The Moran's I index of the landscape ecological risk in each period exceeded 0,indicat‐ing a positive correlation in the spatial distribution of landscape ecological risk values within the study area.

关 键 词：生态风险 景观异质性 林甸县 景观格局指数 

分 类 号：S718.557[农业科学—林学]