摘要
为了明确海南省一级古树(树龄≥300 a)资源特征及空间分布格局。采用文献搜集和野外调查相结合的方法,对全省古树资源现状进行了系统调查,并分析植物组成与区系类型、结构特征、分布格局及探讨了主要的影响因子。结果表明:海南省共有一级古树1075株,隶属33科55属74种,其数量多且种类丰富;以桑科、无患子科、壳斗科为优势科,以高山榕、四角蒲桃、杏叶柯、荔枝等为代表的热带地区乡土树种为主;一级古树地理区系具有较强热带性质成分。一级古树的树高和胸径呈正态分布,其中树高主要集中在15~25 m,平均树高20.41 m;胸径主要在90~150 cm之间,平均胸径130.01 cm。相关性分析结果显示,海南省一级古树的树高与胸径呈显著正相关(P<0.05)。海南省一级古树分布广泛,但不同区域古树的株数和种数差异较明显,以中部和西部区域为主。DCA分析结果表明,海南省一级古树个体数呈集群分布,大部分一级古树分布在乐东黎族自治县、昌江黎族自治县、琼中黎族苗族自治县、儋州市等西部、中部市县。从生长状况来看,海南省一级古树总体生长状况较好,高达85.02%个体处于健康状态。本研究结果可为森林城市建设和城市森林生态系统构建提供科学参考。
In order to clarify the characteristics and spatial distribution pattern of primary ancient tree resources in Hainan Province.The present situation of ancient tree resources in the whole province was systematically investigated by means of literature collection and field survey,the plant composition,flora type,structural characteristics and distribution pattern were analyzed,and the main influencing factors were discussed.The results show that:There are 1075 old trees belonging to 74 species in 55 genera of 33 families in Hainan Province,and these old trees are abundant in quantity and species.In which,the dominant families including Moraceae,Sapindaceae and Fagaceae,and mainly native tree species including Ficus altissima,Syzygium tetragonum,Lithocarpus amygdalifolius and Litchi chinensis.The distribution characteristics of the old tree resources possess the strong tropical attributes.From structure of old tree resources,height is concentrated on 15~25 m with average height of 20.41 m,diameter at breast height(DBH)is concentrated on 90~150 cm with average DBH of 130.01cm.The correlation results showed that the tree height and breast diameter of the first-class ancient tree in Hainan Province were significantly positively correlated(P<0.05).The first-class old trees in Hainan Province are widely distributed,but there are significant differences in numbers of species and individuals among different distribution regions and they are mainly distributed in the central and western regions of Hainan Province.The results of DCA analysis showed that the number of first-class ancient trees in Hainan Province was clustered,and most of old trees were distributed in Ledong Li Autonomous County,Changjiang Li Autonomous County,Qiongzhong Li and Miao Autonomous County,Danzhou City and other western and central cities and counties.From growth status,the overall growth condition of the first-class old trees were good,and 85.02%of the individuals were in a healthy state,respectively.The study would provide science-based references for the construction of forest city and the establishment of urban forest ecosystem.
作者
林玲
黄川腾
陈飞飞
张孟文
董晓娜
陈琳
Lin Ling;Huang Chuanteng;Chen Feifei;Zhang Mengwen;Dong Xiaona;Chen Lin(Hainan Academy of Forestry(Hainan Academy of Mangrove),Haikou,571100)
出处
《分子植物育种》
CAS
北大核心
2024年第19期6514-6522,共9页
Molecular Plant Breeding
基金
海南省创新能力建设计划项目(KYYS-2021-04)资助。
关键词
一级古树
结构特征
分布格局
First-class old trees
Structure characteristics
Distribution pattern
