三农、土地与生态

长株潭绿心地区碳汇用地时空演变研究

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  • 湖南省第二测绘院,中国湖南 长沙 410000
王本礼(1969—),男,高级工程师,研究方向为基础测绘、国土空间规划。E-mail:402473755@qq.com

收稿日期: 2023-01-02

  修回日期: 2023-05-23

  网络出版日期: 2023-11-03

基金资助

湖南省自然资源领域推进碳达峰碳中和重大技术研究[(2022)5号]

Spatiotemporal Evolution of Carbon Sink Land in Changsha-Zhuzhou-Xiangtan Greenheart Area

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  • The Second Surveying and Mapping Institute of Hunan Province,Changsha 410000,Hunan,China

Received date: 2023-01-02

  Revised date: 2023-05-23

  Online published: 2023-11-03

摘要

长株潭绿心地区作为长株潭城市群绿色空间结构中的重要组成部分,承担着提供城市公共生态服务的功能,具有大规模、高碳汇、生态系统敏感的特点。文章以长株潭绿心地区作为研究区域,在巩固提升碳汇能力的背景下,结合过往研究,将用地类型划分为碳汇用地与非碳汇用地,分析其2015、2020年碳汇用地及碳汇能力的时空演变特征。研究发现:①长株潭绿心地区碳汇用地面积总体呈缩减态势,其总量的减少主要体现在农用地的缩减;非碳汇用地中建设用地增速低但增量高,其他农用地增长显著。②碳汇用地内部转化的方向为碳汇能力提升的用地结构;碳汇用地向非碳汇用地的转化顺差较大,而非碳汇用地向碳汇用地的转移主要流向林地。③长株潭绿心地区用地总体景观格局多样性和丰富度提升显著,景观破碎化程度加剧,人类活动对景观格局有一定的消极干扰,且难以控制景观破碎化程度的加剧。④碳汇能力的空间分布呈“东强西弱”的格局,2015—2020年总体碳汇能力总体提升显著。⑤湘江沿岸的碳汇用地转换为建设用地的风险极高;中部山地区破碎化的农村建设用地将会对碳汇用地的连通性产生影响,从而导致碳汇能力的降低。文章为绿心地区碳汇用地格局优化提供科学依据。

本文引用格式

王本礼, 王也, 曾超群 . 长株潭绿心地区碳汇用地时空演变研究[J]. 经济地理, 2023 , 43(6) : 176 -182 . DOI: 10.15957/j.cnki.jjdl.2023.06.018

Abstract

Changsha-Zhuzhou-Xiangtan greenheart area,as a critical part of the green space structure of the Changsha-Zhuzhou-Xiangtan urban agglomeration,performs the function of providing ecological services to the urban public and has the characteristics of large scale,high carbon sink and sensitive ecosystem. In the context of consolidating and enhancing the capacity of carbon sinks,and in conjunction with previous studies, this article classifies land types as carbon sink land and non-carbon sink land,and analyzes the spatiotemporal evolution of carbon sink land and carbon sink capacity in 2015 and 2020. The results show that: 1) The area of carbon sink land in the greenheart area show a decreasing trend,and its total decrease is mainly reflected in the reduction of agricultural land. In non-carbon sink land,the growth rate of construction land is low,but the increment rate is elevated, and the growth rate of other agricultural land is significant. 2) The direction of internal conversion of carbon sink land is the land structure with enhanced carbon sink capacity. There is a large surplus in the conversion of carbon sink land to non-carbon sink land,and the transfer of non-carbon sink land to carbon sink land is mainly to forest land. 3) The diversity and richness of the overall landscape pattern in the greenheart area increase significantly,the degree of landscape fragmentation intensifies. Human activities has negative impacts on landscape patterns. 4) The overall carbon sink capacity increased significantly from 2015 to 2020. The spatial distribution of carbon sink capacity showed a pattern of "strong in the east,weak in the west". 5) The risk for the carbon sink land along the Xiangjiang River converting into construction land is extremely steep. The fragmentation of rural built-up land in the central mountains has a positive effect on carbon sink land,resulting in a reduction in carbon sink capacity. The results provide a scientific basis for the optimization of carbon sink land patterns in the greenheart area.

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