Disentangling the influencing factors of spatiotemporal evolution of sloping farmland in the Yangtze River Economic Belt, China  

作　　者：LIANG Jiale XIA Nan CHEN Wanxu LI Manchun 

机构地区：[1]Jiangsu Provincial Key Laboratory of Geographic Information Technology,School of Geography and Ocean Science,Nanjing University,Nanjing 210023,China [2]Department of Geographic Information Science,Nanjing University,Nanjing 210023,China [3]Collaborative Innovation Center for the South Sea Studies,Nanjing University,Nanjing 210093,China [4]School of Geography and Information Engineering,China University of Geosciences,Wuhan 430074,China [5]Yunnan Key Laboratory of Plateau Geographic Processes and Environmental Changes,Faculty of Geography,Yunnan Normal University,Kunming 650500,China [6]Key Laboratory of Natural Resources Monitoring and Supervision in Southern Hilly Region,Ministry of Natural Resources,Changsha 410118,China

出　　处：《Journal of Mountain Science》2024年第11期3702-3719,共18页山地科学学报（英文）

基　　金：funded by the grants from the National Natural Science Foundation of China(42230113,42101415);Ministry of Education of Humanities and Social Science Project(21YJCZH181);supported by the Key Laboratory of Natural Resources Monitoring and Supervision in Southern Hilly Region,Ministry of Natural Resources(NRMSSHR2023Y02).

摘　　要：Sloping farmland(SpF)is not only an important space for food production and supply in China’s hilly areas,but also a major source of soil erosion.Thus,it is important to achieve a healthy balance between regional food security and environmental protection.Yangtze River Economic Belt(YREB),an important grain production base where SpF concentrated in China,is also faced with serious soil erosion.However,research at the macro scale on the spatiotemporal change of SpF and its driving forces in YREB is still lacking.To bridge the gap,we first analyzed the long-term evolution characteristics of SpF in 1069 counties in the YREB and then explored the driving mechanism of SpF changes during 1980-2020.Results showed that the SpF in the YREB continuously decreased during the study period,with a total area decreasing by 26,300 km2.SpF was primarily concentrated in the upper reaches of the YREB while SpF use dynamic degree varied significantly with the most active change in the lower reaches,reaching to a maximum of 0.324%.The spatial gravity of SpF distribution relocated 20.15 km towards the southwest.As for the driving factors,the socioeconomic factors contributed greater to SpF changes in the whole YREB and its subregions.The intensity of human activities is the most crucial,with factor contribution rate constantly above 0.76.The interactive detection revealed that the prevailing interaction format was primarily bi-enhanced,supplemented with nonlinear-enhanced,which amplified the role of different factors after interacting with them.The pair-wise interaction involving socioeconomic factors had a more potential effect on SpF changes compared to those between physical geography and locational factors.The influence of the intensity of human activities on SpF changes is greatly enhanced after interacting with any factor.It dominated SpF changes in the YREB and its interaction with GDP played an important role at all times.These findings can enlighten differential management strategies of SpF use and ecological conservation i

关 键 词：Sloping farmland driving factors standard deviation ellipse Geographic detector Yangtze River Economic Belt 

分 类 号：F323.211[经济管理—产业经济] P208[天文地球—地图制图学与地理信息工程]