摘要
基于阿尔泰山额尔齐斯河流域2000—2020年土地利用数据,运用InVEST模型,模拟并分析了不同时期该流域碳储量空间分布,并探讨了人类活动对碳储量空间分布的影响。研究表明:(1)流域内土地利用类型以草地和未利用地为主,2000—2020年土地利用格局发生明显改变,耕地和城乡、工矿、居民用地分别增加2619.35 km^(2)和186.68 km^(2);草地和水域分别增加4725.13 km^(2)和33.47 km^(2);林地和未利用地分别减少2328.88 km^(2)和5237.76 km^(2)。(2)研究期间,流域内碳储量空间分布格局较为相似且呈现带状分布,高值区分布在高海拔地区,低值区分布在低海拔地区,2000年、2005年、2010年、2015年和2020年流域内碳储量总量分别为641.60 Tg、645.78 Tg、646.83 Tg、650.28 Tg和665.91 Tg,其年增长率为0.95%,呈现上升趋势。(3)流域内碳储量减少或增加的区域呈现点状分布,2000—2020年碳储量的增加量大于减少量,因此,额尔齐斯河流域的固碳能力呈上升趋势。
Carbon sequestration is among the main functions of terrestrial ecosystem services,and the carbon sequestration capacity of terrestrial ecosystems directly affects global carbon emissions and climate change processes.Human activities directly influence land use and cover change,consequently affecting the carbon sequestration function of ecosystems.The terrestrial ecosystem services in dry and cold regions are more vulnerable and significantly impacted by human activities.Therefore,utilizing land use data from the Irtysh River Basin in the Altai Mountains from 2000 to 2020,the InVEST model was used to estimate and analyze the spatial distribution of carbon stocks in the basin during different periods.Subsequently,the influence of human activities on the spatial distribution of carbon stocks was discussed.The results show the following:(1)The main land use types in the basin are woodland,grassland,and unused land,and the land use pattern changed significantly from 2000 to 2020.Cultivated land,urban and rural land,industrial and mining land,and residential land expanded continuously,increasing by 2619.35 km^(2)and 186.68 km^(2),respectively.Grassland and water areas initially decreased and then expanded,increasing by 4725.13 km^(2)and 33.47 km^(2),respectively.Meanwhile,forest land and unused land decreased continuously by 2328.88 km^(2)and 5237.76 km^(2),respectively.(2)During this period,the spatial distribution pattern of carbon stocks in the basin was similar and showed a zonal distribution.High-value areas were distributed in high-altitude regions where grassland and woodland were clustered,while low-value areas were distributed in low-altitude regions where unused land was clustered.In 2000,2005,2010,2015,2020 the total carbon storage in the basin was 641.60 Tg,645.78 Tg,646.83 Tg,650.28 Tg,and 665.91 Tg,respectively,with an annual growth rate of 0.95%,showing an upward trend.(3)The areas in the basin where carbon storage decreased or increased showed a spot-like distribution.Furthermore,carbon storage reducti
作者
张晓敏
张东梅
张伟
ZHANG Xiaomin;ZHANG Dongmei;ZHANG Wei(State Key Laboratory of Cryospheric Science,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,Gansu,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《干旱区研究》
CSCD
北大核心
2023年第8期1333-1345,共13页
Arid Zone Research
基金
中国科学院A类战略性先导科技专项(XDA20100305)
国家自然科学基金面上项目(41971083)。
