沿海资源富集区景观格局脆弱度的时空演变特征分析  

Spatial-temporal Evolution of Landscape Pattern Vulnerability in Coastal Resource-enriched Area

作　　者：李辉辉 杨永崇[1] 杜嵩 杨梅焕[1] 陈宝强 LI Huihui;YANG Yongchong;DU Song;YANG Meihuan;CHEN Baoqiang(School of Surveying and Mapping Science and Technology,Xi'an University of Science and Technology,Xi'an 710054,Chin)

机构地区：[1]西安科技大学测绘科学与技术学院,陕西西安710054

出　　处：《安全与环境工程》2022年第2期221-229,247,共10页Safety and Environmental Engineering

基　　金：国家自然科学基金项目(41501571)。

摘　　要：探究最佳尺度下景观格局脆弱度的时空演变特征,有助于生态环境保护和功能优化。选择沿海资源富集区招远市为研究区,以2008年、2013年、2018年三期土地利用数据为基础,借助信息损失评价模型和半变异函数确定最佳空间粒度和幅度,构建了研究区景观格局脆弱度评价模型;运用普通克里金插值方法,得到研究区景观格局脆弱度分布图;利用空间自相关分析理论,对区域景观格局脆弱度的时空变化特征及空间关联格局进行分析。结果表明:①研究区景观格局指数具有明显的尺度效应,90 m栅格大小和2 km方形网格为研究区景观格局脆弱度最佳分析尺度;②2008—2018年研究区整体景观格局脆弱度有所上升,表现为低脆弱度区面积占比不断下降,高脆弱度区面积不断扩张,景观格局脆弱程度不断加剧;③研究区景观格局脆弱度在空间上呈显著正相关,空间聚集效应明显,高—高值聚集区主要发生在西北区域,并有继续向北蔓延的趋势,低—低值聚集区未发生较大变化。该研究结果可为类似城市合理开发和规划提供支持和服务。It is conducive to ecological environmental protection and functional optimization to explore the spatial-temporal evolution characteristics of landscape pattern vulnerability at the optimal scale.Taking Zhaoyuan City which is a coastal resource-enriched area as the study area,based on the land use data in 2008,2013 and 2018,with the help of the information loss evaluation model and semi-variogram to determine the optimal granularity and amplitude,this paper constructs landscape pattern vulnerability index,obtains the distribution map of landscape pattern vulnerability through ordinary Kriging interpolation,and analyzes the temporal and spatial characteristics of the vulnerability of regional landscape pattern and spatial correlation patterns based on the spatial autocorrelation analysis theory.The results are as follows:①The landscape pattern index has obvious scale effect,and 90 m grid size and 2 km square grid are the best analysis scale for the study area;②The overall landscape pattern vulnerability of the region has increased from 2008 to 2018,which shows that the proportion of low vulnerable area is decreasing,the area of high vulnerable area is expanding,and the vulnerability degree is increasing;③The landscape pattern vulnerability of the study area shows a significant positive correlation in space,the spatial aggregation effect is obvious,and the high-high aggregation area mainly occurs in the northwest region,and continues to spread northward,while the low-low type of agglomeration area does not change much.The research results can provide support and services for rational urban development and planning of similar cities.

关 键 词：景观格局 脆弱度 尺度效应 半变异函数 空间自相关 沿海资源富集区 

分 类 号：X171.1[环境科学与工程—环境科学]