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[1]Xu Jinlong,Lu Xinhai,Huang Tianneng,et al.Temporal and Spatial Evolution of Ecosystem Carbon Storage and Its Driving Factors in the Yunnan-Guizhou-Guangxi Rocky Desertification Area[J].Research of Soil and Water Conservation,2023,30(06):406-414.[doi:10.13869/j.cnki.rswc.2023.06.049]

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Temporal and Spatial Evolution of Ecosystem Carbon Storage and Its Driving Factors in the Yunnan-Guizhou-Guangxi Rocky Desertification Area

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 06 Page number: 406-414 Column: Public date: 2023-10-10

Title:: Temporal and Spatial Evolution of Ecosystem Carbon Storage and Its Driving Factors in the Yunnan-Guizhou-Guangxi Rocky Desertification Area

Author(s):: Xu Jinlong^1,2, Lu Xinhai¹, Huang Tianneng³, Wen Xue³, Tan Yun¹; (1.School of Public Administration, Central China Normal University, Wuhan 430071, China; 2.Institute for Maritime Silk Road and Guangxi Regional Development, Guangxi University of Finance and Economics, Nanning 530004, China; 3.Economic and Trade College, Guangxi University of Finance and Economics, Nanning530004, China)

Keywords:: Yunnan-Guizhou-Guangxi Rocky Desertification Area; ecosystem carbon storage; temporal and spatial evolution; driving factors

CLC:: F301.2

DOI:: 10.13869/j.cnki.rswc.2023.06.049

Abstract:: [Objective] The aim of this study is to explore the temporal and spatial evolution of ecosystem carbon storage and its driving factors in rocky desertification area of Yunnan, Guangxi and Guizhou, which is a special ecologically fragile area, so as to provide theoretical reference for scientifically evaluating the ecological management effect, optimizing land use pattern, improving ecosystem carbon storage and enhancing ecosystem carbon sink capacity.[Methods] Land use transfer matrix, InVEST model and geographical detector were used to analyze the characteristics of land use change, the temporal and spatial evolution of ecosystem carbon storage and the driving factors of spatial differentiation in rocky desertification areas of Yunnan, Guangxi and Guizhou from 1990 to 2018. [Results] Yunnan-Guizhou-Guangxi Rocky Desertification Area was booming with urban construction and effective rocky desertification control. Land area for construction and water area increased by 116.38% and 76.40%, respectively during the study period, while the unused land, mainly rocky bare rocky land, decreased by 47.45% and was primarily converted into grassland and woodland. A fluctuating decreasing trend of carbon storage in the ecosystem of Yunnan-Guizhou-Guangxi Rocky Desertification Area was observed, which decreased to 3.061 billion tons in 2018, decreased by 0.52% compared with that in 1990. The encroachment of arable land and forest land by the expansion of construction land was the chief reason for the decrease of carbon stock. The spatial distribution of carbon stocks in the Yunnan-Guizhou-Guangxi Rocky Desertification Area ecosystem varied significantly, maintained the spatial differentiation characteristics of being higher level in the southwest, followed by the south and lower level in the north, corresponding to the Yunnan Area, Guangxi Area and Guizhou Area in overall order. Differences in the spatial distribution of carbon stocks in ecosystems in the Yunnan-Guizhou-Guangxi Rocky Desertification Area were influenced by both physical and socio-economic factors, but human activities contributed most significantly. Distance to county centerwas always the single factor with the greatest influence, and all interactive factors with significant influence included distance to county center. [Conclusion] The carbon storage in the rocky desertification area of Yunnan, Guangxi and Guizhou was fluctuating and decreasing, and it was affected by multiple factors of physical geography and social economy, its spatial distribution was characterized as higher level in the southwest, followed by the south, and lower level in the north.

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Last Update: 2023-10-10