摘要
选择典型生态脆弱区黔中典型喀斯特地区—普定县为研究对象,采用土地利用动态度和土地利用转移分析方法,应用InVEST模型测算2003-2020年的陆地生态系统碳储量及其空间分布格局,探讨建设用地扩张对碳储量变化的影响。结果表明:(1)2003-2020年建设用地面积一直保持增加趋势,扩张速率表现为减缓态势,空间变化在中南部区域最为显著,主要侵占旱地、水田和灌木林地。(2)普定县碳储量整体呈上升趋势,累计增加15.07×10^(5)t,主要因碳密度较高的灌木林地大幅挤占旱地。(3)建设用地变化致使碳储量损失了22.37×10^(4)t,以中南部中心城区碳储量下降最为明显。因此,建议研究区在城市扩张过程中优先考虑碳密度较低的未利用地,同时限制建设用地对旱地、水田以及灌木林地的占用,以减少建设用地扩张对区域碳储存能力的影响。
To elucidate the effect of construction land expansion on carbon storage capacity of terrestrial ecosystem in typical ecologically vulnerable areas in China,Puding County,a typical Karst area in central Guizhou,was selected as the research object.The dynamic attitude index and land use transfer analysis methods were used to estimate and analyze the carbon storage and its spatial distribution pattern of different land types in the county from 2003 to 2020,combined with the carbon model InVEST,and the influence of construction land expansion on the change of carbon storage was discussed.The results showed that(1)from 2003 to 2020,the construction land maintained an expansion trend,and the expansion rate showed a slowing trend.Spatial variation was concentrated in the central and southern regions and encroachment mainly occurred on dry land,paddy land,and shrubland.(2)The ecosystem carbon storage in Puding County showed an overall upward trend from 2003 to 2020,with a cumulative increase of 15.07×10^(5)t.The increase in shrubland was the main reason for the increase in carbon storage.(3)The change of construction land resulted in a loss of 22.37×10^(4)t of carbon storage,which was mainly reflected in the significant decrease of carbon storage in the central urban area and the southern region,which was due to the conversion of shrub land and paddy land to construction land.Therefore,it is suggested that unused land should be given priority in the process of urban expansion in the study area,and the occupation of construction land to dry land,paddy field and shrub land should be limited to reduce the impact of construction land expansion on regional carbon storage capacity.
作者
李月
罗红芬
LI Yue;LUO Hong-fen(School of Public Administration,Guizhou University of Finance and Economics,Guiyang 550025,Guizhou,China)
出处
《西北林学院学报》
CSCD
北大核心
2024年第1期185-192,199,共9页
Journal of Northwest Forestry University
基金
贵州省教育厅青年科技人才成长项目(黔教合KY字〔2022〕202号)
贵州财经大学在校学生科学研究项目(2022ZXSY110)。
