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]
滇桂黔石漠化片区生态系统碳储量时空演变及其驱动因子
- Title:
- Temporal and Spatial Evolution of Ecosystem Carbon Storage and Its Driving Factors in the Yunnan-Guizhou-Guangxi Rocky Desertification Area
- 文章编号:
- 1005-3409(2023)06-0406-09
- Keywords:
- Yunnan-Guizhou-Guangxi Rocky Desertification Area; ecosystem carbon storage; temporal and spatial evolution; driving factors
- 分类号:
- F301.2
- 文献标志码:
- A
- 摘要:
- [目的]探究特殊生态脆弱区——滇桂黔石漠化片区的生态系统碳储量时空演变规律及其驱动因子,为科学评估其生态治理效果、优化土地利用格局、提高生态系统碳储量、提升生态系统碳汇能力等提供理论参考。[方法]综合运用土地利用转移矩阵、InVEST模型和地理探测器等方法,分析滇桂黔石漠化片区1990—2018年土地利用变化特征、生态系统碳储量时空演变规律及空间分异驱动因子。[结果]滇桂黔石漠化片区城市建设蓬勃发展,石漠化治理效果良好。研究期内,建设用地和水域面积分别增加116.38%和76.40%,以石漠化裸岩石质地为主的未利用地则减少47.45%并主要转化为草地和林地; 滇桂黔石漠化片区生态系统碳储量呈波动下降趋势,2018年降至30.61亿t,较1990年减少了0.52%。建设用地扩张对耕地和林地的侵占是碳储量减少的主要原因; 滇桂黔石漠化片区生态系统碳储量空间分布差异明显,始终维持西南较高、南部次之、北部较低的空间分异特征,整体依次对应云南片区、广西片区以及贵州片区; 滇桂黔石漠化片区生态系统碳储量空间分布差异受自然地理要素和社会经济要素共同作用,但人类活动影响最为显著。“距离县中心”始终是影响力最强的单因子,且所有具备较强影响力的交互因子均包含“距离县中心”因子。[结论]滇桂黔石漠化片区的生态系统碳储量呈波动下降趋势,受自然地理、社会经济多重因素影响,其空间分布呈西南较高、南部次之、北部较低的特征。
- 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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备注/Memo
收稿日期:2022-09-18 修回日期:2022-10-26
资助项目:国家自然科学基金项目“滇桂黔石漠化片区脱贫农户返贫抑制与可持续生计研究”(72004037); 国家自然科学基金项目“国家安全视角下我国中越边境土地利用系统安全预警及优化配置研究”(42161046); 广西自然科学资助项目“广西边境土地利用与管控对国家安全的影响评价及优化调控”(2021JJB150070)
第一作者:许进龙(1991—),男,广西百色人,博士研究生,助理研究员,主要从事土地资源管理与区域发展研究。E-mail:943448263@qq.com
通信作者:黄天能(1986—),男,广西百色人,博士,副教授,主要从事土地经济与管理。E-mail:505362152@qq.com