摘要
以松嫩沙地为研究区,基于1990年、2000年、2010年、2020年4期Landsat 系列数据,以当量因子法为基础,分析松嫩沙地土地利用变化,探究松嫩沙地近年来生态系统服务价值时空变化特征。结果表明:松嫩沙地土地利用类型变化明显,耕地、其他未利用土地、城乡工矿居民用地面积总体呈上升趋势,水域、沙地、林地、草地面积总体呈下降趋势;生态系统服务价值总体呈现上升趋势,其中,食物生产、水资源供给、土壤保持、生物多样性呈现上升趋势,原料生产、气候调节、维持养分循环、净化环境、美学景观、气体调节、水文调节呈现下降趋势。基于上述结果,认为在城市建设中,应加大对沙地、草地、林地、水域的保护,优化土地利用结构,提升区域生态系统服务功能。
Taking Songnen sandy land as the research area,this paper has analyzed the land use change of Songnen sandy land and explored the temporal and spatial change characteristics of ecosystem service value in Songnen sandy land in recent years based on the Landsat series data of four periods(1990,2000,2010 and 2020)via the equivalent factor method.The results showed that the land use types of Songnen sandy land changed obviously,the area of cultivated land,other unused land,urban and rural industrial and mining land and residential land showed an upward trend,while the area of waters,sandy land,forest land and grassland showed a downward trend.The overall value of ecosystem services showed an upward trend,including food production,water supply,soil conservation and biodiversity.But raw material production,climate regulation,nutrient cycling maintenance,environmental purification,aesthetic landscape,gas regulation and hydrological regulation showed a downward trend.Based on the above results,it is considered that in urban construction,we should increase the protection of sandy land,grassland,forest land and waters,optimize the land use structure and improve the service function of regional ecosystem.
作者
巴之丹
BA Zhi-dan(School of Tourism and Geographical Sciences,Jilin Normal University,Siping 136000,PRC)
出处
《湖南农业科学》
2021年第6期98-101,117,共5页
Hunan Agricultural Sciences
基金
吉林省科技发展计划项目(20160520077JH)。
