Landscape fragmentation associated with the Qingzang Highway and its influencing factors-A comparison study on road sections and buffers  

作　　者：Yi Miao Teqi Dai Xingdou Yang Jinping Song 

机构地区：[1]Faculty of Geographical Science,Beijing Normal University,19th Xinjiekouwai Street,Haidian District,Beijing 100875,China

出　　处：《Geography and Sustainability》2021年第1期59-67,共9页地理学与可持续性（英文）

基　　金：supported by The Second Tibetan Plateau Scientific Expedition and Research Program"Regional functional types and regionalization of ecological security"(Grant No.2019QZKK0406).

摘　　要：Many studies have examined the effect of roads on landscape fragmentation.Yet they rarely considered local characteristics of the road and road buffer widths.Therefore,this study that took place in the Qingzang Highway(QH)examined the variations in road buffers and road sections of landscape fragmentation.The QH was divided into 32 sections with 23 buffer areas.Based on the indicators of landscape fragmentation from 1980 to 2018,we found significant spatial heterogeneity between sections and buffers.Generally,landscape fragmentation de-creased with increasing buffer distance to the QH.For different sections,the coefficients of variation between buffers were rather high and significantly different.Therefore,fixed-width buffers may overestimate or underes-timate the spatial scope and influence intensity of a road.The impacts of road sections around provincial capitals,prefecture-level cities and main counties on landscape fragmentation were relatively extensive and formed clus-ters of highly fragmented areas.Geodetector results indicated that natural and anthropogenic factors,such as altitude,climate,distance to major settlements and socioeconomic conditions,could well explain the spatiotem-poral characteristics of landscape fragmentation.Altitude,precipitation and the distance to major settlements had higher explanatory power for landscape fragmentation in permafrost regions,whereas slope and socioeconomic condition had higher explanatory power for non-permafrost regions in Xizang Autonomous Region.

关 键 词：Qingzang Highway Landscape fragmentation Road section BUFFER Geodetector 

分 类 号：TU98[建筑科学—城市规划与设计]