理解青藏高原三江源地区放牧压力的空间异质性  

Understanding the spatial heterogeneity of grazing pressure in the Three-River-Source Region on the Tibetan Plateau

作　　者：谷昌军 刘林山 张镱锂 魏博 崔伯豪 宫殿清 GU Changjun;LIU Linshan;ZHANG Yili;WEI Bo;CUI Bohao;GONG Dianqing(Key Laboratory of Land Surface Pattern and Simulation,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China;College of Resources and Environment,University of Chinese Academy of Sciences,Beijing 100049,China;National Disaster Reduction Center of China,Ministry of Emergency Management,Beijing 100124,China)

机构地区：[1]Key Laboratory of Land Surface Pattern and Simulation,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China [2]College of Resources and Environment,University of Chinese Academy of Sciences,Beijing 100049,China [3]National Disaster Reduction Center of China,Ministry of Emergency Management,Beijing 100124,China

出　　处：《Journal of Geographical Sciences》2023年第8期1660-1680,共21页地理学报（英文版）

基　　金：The Second Tibetan Plateau Scientific Expedition and Research,No.2019QZKK0603;Strategic Priority Research Program of the Chinese Academy of Sciences,No.XDA20040201;National Natural Science Foundation of China,No.41671104。

摘　　要：Elucidating the distribution of the grazing pressure requires an understanding of the grazing activities.In this study,we analyzed the grazing behavior of yaks in Three-RiverSource Region(TRSR)and identified the main factors influencing the distribution of grazing intensity(GI)using trajectory data and remote sensing datasets.Our results revealed that a semi-resident transhumance strategy is employed in this region.The average grazing time(GT)of four GPS collars over the year was 11.84 h/day(N6),11.01 h/day(N11),9.25 h/day(N18),and 11.61 h/day(N24).GT was generally higher in warm seasons(summer and autumn)than in cold seasons(spring and winter).The average daily moving speed was found to be closely related to the pasture size of different herders and the seasons.Geodetector analysis identified the distance to camp(DOC)as the most important single factor influencing the distribution of GI,explaining up to 52% of the GI variations.However,relying solely on this factor may not accurately depict the actual GI distribution.When pairwise factors interacted,the explanatory power of the model increased,ranging from 34.55% to 63.26%.Our study highlights the importance of considering multiple factors when predicting grazing intensity,as grazing activities tend to cluster near settlements,but other factors may also be influential.

关 键 词：grazing intensity GPS-tracking spatial heterogeneity YAK Tibetan Plateau 

分 类 号：S812[农业科学—草业科学]