生态环境学报 ›› 2023, Vol. 32 ›› Issue (2): 215-225.DOI: 10.16258/j.cnki.1674-5906.2023.02.001

• 研究论文 •    下一篇

基于InVEST模型的太行山沿线地区生态系统碳储量时空分异驱动力分析

王成武1(), 罗俊杰1,*(), 唐鸿湖2   

  1. 1.西南石油大学地球科学与技术学院,四川 成都 610500
    2.四川天奥空天信息技术有限公司,四川 成都 610500
  • 收稿日期:2022-09-06 出版日期:2023-02-18 发布日期:2023-05-11
  • 通讯作者: *罗俊杰(1999年生),男,硕士研究生。E-mail: luo_junjie001@163.com
    *罗俊杰(1999年生),男,硕士研究生。E-mail: luo_junjie001@163.com
  • 作者简介:王成武(1973年生),男,副教授,硕士,主要研究方向为生态环境承载力。E-mail: 314415194@qq.com
  • 基金资助:
    国家重点研发计划项目(2020YFF0414359);四川省科技计划项目(2023YFS0406)

Analysis on the Driving Force of Spatial and Temporal Differentiation of Carbon Storage in the Taihang Mountains Based on InVEST Model

WANG Chengwu1(), LUO Junjie1,*(), TANG Honghu2   

  1. 1. College of Earth Science and technology, Southwest Petroleum University, Chengdu 610500, P. R. China
    2. Sichuan Tianao Aerospace Information Technology Co., Ltd, Chengdu 610500, P. R. China
  • Received:2022-09-06 Online:2023-02-18 Published:2023-05-11

摘要:

提升区域的碳汇能力是中国生态文明建设的重点战略方向,是促进经济社会发展绿色转型的重要举措。太行山区是中国华北地区重要的生态屏障,其生态系统拥有良好的碳汇能力。研究太行山区生态系统碳储量时空分异特征及其影响驱动机制,对华北地区落实国家“双碳”工程建设,提升区域释氧固碳能力,乃至全面提升区域生态环境质量具有重要的意义。以太行山区为例,基于2005、2010、2015、2020年太行山区四期土地覆盖及碳密度数据,使用InVEST模型估算研究区碳储量,使用地理探测器探索驱动碳储量空间分异的主要因子,分析驱动机制。研究结果表明,(1)在2005-2020年期间,太行山区的土地利用类型发生明显变化。林地、建设用地土地利用面积增加,耕地、草地土地利用面积减少。耕地和草地主要转化为建设用地,同时也有一部分耕地转化为林地。(2)太行山区碳储总量在1.48×109-1.50×109 t之间,整体逐渐增加。从土地类型来看,碳储量占比由大到小依次为:林地、耕地、草地、建设用地、水域、未利用地。林地增加是太行山区碳储量增加的主要原因;(3)太行山区碳储量空间分异主要受地形、环境和土壤因素的影响。根据地理探测器分析,NDVI(0.214-0.280)和土壤类型(0.151-0.160)的解释力明显大于其他因素,是驱动太行山区碳储量空间分异的主导因子。各驱动因子间的交互作用强度均强于单一因子,其中协同作用最强的是DEM与NDVI协同影响类型(0.368-0.406),这说明在“双碳”建设时需要综合考虑驱动因子对生态系统碳储量空间分异的作用。该研究使用了地理探测器方法来探索生态系统碳储量空间分异驱动因子的作用机制,为生态系统碳汇领域的研究提供了一种新的思路。

关键词: 碳储量, 驱动因子, InVEST模型, 地理探测器, 随机森林, 太行山区

Abstract:

Improving regional carbon sink capacity is a key strategic initiative for China's ecological civilization construction, which is an important measure to promote the green transformation of economic and social development. The Taihang Mountains are the significant ecological barrier in North China, and their ecosystems have efficient carbon sink capacity. It is of great significance to study the spatiotemporal differentiation characteristics of carbon storage in the ecosystem of the Taihang Mountains and the driving mechanism of influencing factors to implement the national “dual carbon” project construction in North China, strengthen the regional oxygen release and carbon sequestration capacity, and even comprehensively improve the quality of the regional ecological environment. In this study, based on the land cover and carbon intensity data of the Taihang Mountains in 2005, 2010, 2015 and 2020, the spatial distribution of carbon storage area was estimated with the InVEST model. On this basis, the main driving factors affecting its spatial differentiation were explored by using geographic detectors, and this paper analyzed its driving mechanism. The results showed that: (1) from 2005 to 2020, the land use types in the Taihang Mountains had been changed significantly. The land use area of forest and construction land increased, and the land use area of farmland and grassland decreased. Farmland and grassland were mainly converted to construction land, while some were converted to forests. (2) The total carbon storage in the Taihang Mountains ranged from 1.48×109-1.50×109 t, with an overall gradual increase. From the perspective of land type, the descending order of the proportion of carbon storage showed that forest>farmland>grassland>construction land>water>unused land. The increases of forest and construction land were the main reasons for the increase in carbon storage. (3) The spatial differentiation of carbon storage in the Taihang Mountains was affected by topographic, environmental and soil factors. Based on Geodetector, the influences of NDVI (0.214-0.280) and soil type (0.151-0.160) on the spatial differentiation of carbon storage were significantly greater than those of other factors. The interaction between the driving factors was stronger than that of a single factor, and the strongest synergistic effect was the DEM synergistic NDVI type (0.368-0.406), which indicated that the role of drivers on the spatial variation of ecosystem carbon stocks needs to be considered in the construction of “double carbon”. This study used Geodetector approach to explore the mechanisms of the driving factors of spatial differentiation in ecosystem carbon storage, and provides a new way for research in the field of ecosystem carbon storage.

Key words: carbon storage, driving factor, InVEST model, Geodetector, random forest, Taihang Mountains

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