多尺度景观多样性分析及阈值探讨  

Multi-scale Landscape Diversity Analysis and Threshold Discussion

作　　者：马彪 毛子玄 李权玺 罗莉 刘学录[1] Ma Biao;Mao Zixuan;Li Quanxi;Luo Li;Liu Xuelu(College of Resources and Environmental Sciences,Gansu Agricultural University,Lanzhou Gansu 730070,China)

机构地区：[1]甘肃农业大学资源与环境学院,甘肃兰州730070

出　　处：《国土与自然资源研究》2025年第3期63-69,共7页Territory & Natural Resources Study

基　　金：甘肃省教育厅创新创业教育教学改革研究项目(CXCYJG2022002);甘肃省教育科学“十三五”规划2020年度一般课题项目(GS[2020]GHB4640);甘肃省自然资源规划科研项目(GAU-XZ-20160812)资助。

摘　　要：本文从县域、乡镇垂直等级尺度上探讨了6个研究区不同组分分类下LDI变化特征及其粒度响应,结果表明,(1)甘谷县、武山县、宕昌县景观格局分析的第一、二粒度分别为160 m、1 280 m,综合尺度考虑LDI阈值分别为0.302 7≤LDI≤2.094 7、0.462 7≤LDI≤1.911 9、0.259 0≤LDI≤2.122 2。(2)金山镇、城关镇、新寨乡景观格局分析的第一、二粒度分别为640 m、1 280m,综合尺度考虑LDI阈值分别为0.284 6≤LDI≤1.385 8、0.324 3≤LDI≤2.258 2、0.392 7≤LDI≤1.680 9。(3)不同研究区的LDI相差较小,同一研究区不同景观组分分类下的LDI差异明显。对不同的景观选择合适景观组分分类有利于区域景观规划和生物多样性保护措施的施行。This paper explores the characteristics of LDI changes and its grain size response under different component classifications in six study areas at the vertical hierarchical scales of counties and townships.The results show that,(1)the first and second scale grain size thresholds for landscape pattern analysis in Gangu,Wushan,and Tanchang counties are 160 m and 1280 m,respectively,and the LDI thresholds for comprehensive scale considerations are 0.3027≤LDI≤2.0947,0.4627≤LDI≤1.9119,and 0.2590≤LDI≤2.1222,respectively.(2)The first and second scale grain size thresholds for the landscape pattern analysis of Jinshan Township,Chengguan Township,and Xinzhai Township are 640 m and 1280 m,respectively,and the LDI thresholds for comprehensive scale considerations are 0.2846≤LDI≤1.3858,0.3243≤LDI≤2.2582,and 0.3927≤LDI≤1.6809,respectively.(3)The differences in LDI between different study areas are small,and the differences in LDI between different landscape categories in the same study area are obvious.The selection of the appropriate classification of landscape components for different landscapes is particularly important for regional landscape planning and the implementation of biodiversity conservation measures.

关 键 词：景观多样性 景观组分 空间尺度 阈值 

分 类 号：X87[环境科学与工程—环境工程]