为探讨重庆市渝北区古树的种类组成、个体数量、来源、年龄结构、分布等特征,以及土地利用类型变化对古树的影响,彰显古树传承历史文化、改善城市环境、保护区域生物多样性等价值,在已有的古树资料的基础上,于2021年3—6月对渝北区内分布的古树进行野外调查,并对部分数据进行了补充完善。利用Excel、ArcGIS、Spss Statistics 25等软件,对渝北区古树的等级、科属种组成、生长状况进行分析,总结其空间分布特征,并对渝北区土地利用类型进行划分,研究土地利用类型的变迁,揭示了土地利用类型变化对古树的影响。结果表明,快速的城市化使得古树面临着生境恶化、生长发育空间缩小等问题,高度城市化区域保留下的古树大多是具有较强适应性的树种。在此基础上,提出了针对性的古树保护对策。

The purpose of this study was to explore the species composition,individual number,source,age structure and distribution of ancient trees in Yubei District of Chongqing,and the impact of land use type change on ancient trees,so as to highlight the value of ancient trees in inheriting history and culture,improve urban environment and protect regional biodiversity. Based on the existing data of ancient trees,this study conducted a field survey of ancient trees in Yubei District from March to June in 2021,and supplemented some data. Excel,ArcGIS,Spss Statistics 25 and other software were used to analyze the grade,family,species composition and growth of ancient trees in Yubei District. The spatial distribution characteristics were summarized,and the land use types were divided in Yubei District. The change of land use types was studied,and the influence of land use type change on ancient trees was revealed. The results showed that the rapid urbanization made the ancient trees face the problems of habitat deterioration and narrow growth and development space,and most of the preserved ancient trees in the highly urbanized area were the trees with strong adaptability. On this basis,the targeted conservation strategies of ancient trees were put forward.