南京林业大学学报(自然科学版) ›› 2023, Vol. 47 ›› Issue (2): 115-122.doi: 10.12302/j.issn.1000-2006.202105030

• 研究论文 • 上一篇    下一篇

海南岛中部山区土地利用变化对碳储量时空分异的影响

张育诚1,2(), 韩念龙1,3,*(), 胡珂1, 于淼1, 黎兴强1   

  1. 1.海南大学公共管理学院,海南 海口 570228
    2.广州大学地理科学与遥感学院,广东 广州 510006
    3.惠州学院地理与旅游学院 广东 惠州 516007
  • 收稿日期:2021-05-19 修回日期:2021-10-13 出版日期:2023-03-30 发布日期:2023-03-28
  • 通讯作者: * 韩念龙(nlhan@hainanu.edu.cn),高级工程师。
  • 基金资助:
    海南省自然科学基金项目(421RC1034)

The impact of land-use changes on the spatio-temporal variation of carbon storage in the central mountainous area of Hainan Island

ZHANG Yucheng1,2(), HAN Nianlong1,3,*(), HU Ke1, YU Miao1, LI Xingqiang1   

  1. 1. School of Public Administration, Hainan University, Haikou 570228, China
    2. College of Geography Science and Remote Sensing, Guangzhou University, Guangzhou 510006,China
    3. School of Geography and Tourism, Huizhou University, Huizhou 516007, China
  • Received:2021-05-19 Revised:2021-10-13 Online:2023-03-30 Published:2023-03-28

摘要:

【目的】研究海南岛中部山区土地利用变化与生态系统碳储量之间的时空变化规律,为区域可持续发展及国土空间规划决策提供依据。【方法】采用InVEST 模型估算2000—2018年海南岛中部山区碳储量及其时空分异,结合PLUS模型模拟2050年中部山区土地利用及碳储量变化。【结果】2000、2010和2018年海南岛中部山区的碳储量分别为 80.44×106、79.96×106和79.82×106 t,呈逐年减少趋势,累计减少620 406.31 t。各时期碳储量降低的原因不同:2000—2010年草地的转出是中部山区碳储量减少的主要因素;2010—2018年碳储量减少的原因在于城镇化扩张侵占林地及耕地。林地作为主要地类,贡献大部分的碳储量,是中部山区碳汇的主要来源;同时,草地碳密度远高于其他地类,区域碳储量对其变化较为敏感。基于自然发展状态下的模拟发现,2050年海南岛中部山区的碳储量显著下降,原因在于建设用地和水域面积增加及林地、草地和耕地面积减少。【结论】在城镇化扩张的背景下,生态系统碳储量存在不断下降的风险。未来国土空间规划应采取必要的生态保护措施加强应对,以保障中部山区生态系统碳存储功能稳定及区域的可持续发展。

关键词: 碳储量, 海南岛中部山区, 土地利用变化, InVEST模型, PLUS模型

Abstract:

【Objective】 Understanding the spatio-temporal variation of land use change and ecosystem carbon storage in the central mountainous area of Hainan Island, China can provide a basis for a regional sustainable development and territorial spatial planning.【Method】 The InVEST model was used to estimate the variation of the carbon storage capacity (from 2000 to 2018) of a mountainous region in Hainan Island. These estimations were then used as an input in the PLUS model to simulate the impact of land use changes on the carbon storage of the region in 2050. 【Result】 The carbon storage of the central mountainous area in 2000, 2010 and 2018 was 80.44×106, 79.96×106 and 79.82×106 t, respectively. Throughout this time, the storage decreased, culminating in a cumulative decrease of 620 406.31 t. The reasons for the decrease were: from 2000 to 2010, the shrinking of the grassland biome in the region was the main contributing factor; from 2010 to 2018, the encroachment of urbanization on forest and cultivated land was the main driver of the decrease. As the major biome in the region, forest contributed most of the carbon storage. Grassland was much higher than other land types in terms of carbon storage density, and the regional carbon storage was sensitive to changes in its structure. Under the natural development scenario, the result of simulation indicated that the carbon storage in the study area would drop significantly in 2050, owing to the area increase in construction land and waters and the area decrease in forest land, grassland, and cultivated land. 【Conclusion】 There is a risk of declining carbon storage in ecosystems as urbanization increasing. Therefore, to ensure the stability of ecosystem functions and sustainable development, it is necessary to apply protective measures to the habitats of the study area.

Key words: carbon storage, central mountainous area of Hainan Island, land use change, InVEST model, PLUS model

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