摘要
随着经济发展与城市化进程加快,人类活动对生态环境的扰动越来越强烈,导致生态环境问题日益明显,社会对生态环境安全更加关注。本研究选取桂林市2010年、2015年、2020年共三期土地利用数据,利用ArcGIS分析其土地利用变化情况,并通过InVEST模型计算出2010—2020年桂林市生态系统碳储量,结合土地利用转移变化,分析土地利用变化对碳储量变化的影响。结果表明:(1)桂林市土地利用类型以林地为主,2010—2020年林地面积持续占桂林市土地面积的60%以上,2010-2020年桂林市土地利用变化主要表现为建设用地的快速扩张;(2)2010、2015、2020年桂林市总碳储量分别为2503.45×10^(6)t、2493.36×10^(6)t、2490.56×10^(6)t,呈现逐年减少的趋势,桂林市的固碳能力有所降低;(3)土地利用布局在极大程度上影响了碳储空间分布,桂林市碳储量存在显著的空间变异格局,西北及东部地区碳储量总体较高;(4)不同土地利用类型具有不同的固碳能力,林地、草地、耕地、建设用地、未利用地和水域对研究区的碳储贡献依次降低。本研究通过对桂林生态系统碳储量时空演化分析,以及土地利用变化对生态系统碳储量的影响进行探究,对桂林市国土空间规划、土地利用调整提供科学依据。
With the economic growth and the acceleration of urbanization,the disturbance of human activities to the ecological environment become more intense,resulting in increasingly obvious ecological environmental problems,and society has paid more attention to ecological environmental security.This study selected three periods of land use data from Guilin in 2010,2015 and 2020,analyzed the situation of land use change by ArcGIS,calculated the ecosystem carbon storage of Guilin from 2010 to 2020 through InVEST model,and analyzed the impact of land use change on carbon storage change combined with land use transfer and change.The results showed that:(1)Forestland was the main type of land use in Guilin,whose area continued to account for more than 60%of the land area in Guilin from 2010 to 2020,and the land use change in Guilin from 2010 to 2020 was mainly manifested by the rapid expansion of construction land;(2)The total carbon storage of Guilin in 2010,2015 and 2020 were 2503.45×10^(6)t,2493.36×10^(6)t and 2490.56×10^(6)t respectively,showing a decreasing trend year by year,and the carbon sequestration capacity of Guilin was reduced;(3)Land use layout greatly affected the spatial distribution of carbon storage.There was a significant spatial variation pattern of carbon storage in Guilin,and the northwest and eastern regions had higher carbon storage overall;(4)Different land use types had different carbon sequestration capacities.The carbon storage contribution of forestland,grassland,cultivated land,construction land,unused land and water area to the study area decreased successively.By analyzing the temporal and spatial evolution of ecosystem carbon storage in Guilin and the impact of land use change on ecosystem carbon storage,this paper provides scientific basis for Guilin's territorial spatial planning and land use adjustment.
作者
韦振锋
李集香
黄群英
WEI Zhenfeng;LI Jixiang;HUANG Qunying(Guangxi University of Finance and Economics,Nanning,Guangxi 530007,China)
出处
《农业研究与应用》
2024年第1期39-50,共12页
Agricultural Research and Application
基金
国家自然基金(72364001)
广西财经学院经济与贸易学院(2023XKA18)。
作者简介
第一作者:韦振锋(1983-),男,博士研究生,副教授,主要研究方向为国土空间与生态安全,E-mail:weizhenfeng112@163.com;通信作者:黄群英(1983-),女,研究生,助教,主要从事环境评价研究,E-mail:0314300133@163.com。
