福建汀江源自然保护区种子植物区系研究

Research on seed plant flora of Tingjiangyuan nature reserve in Fujian province

【目的】为该保护区生物多样性及闽西常绿阔叶林的保护提供科学依据。【方法】在实地调查和文献资料查阅的基础上,利用区系地理学原理,统计分析汀江源自然保护区种子植物区系组成和分布区类型,比较其与周边相邻3个自然保护区的种子植物区系的相似性。【结果】1)汀江源自然保护区共有野生种子植物147科599属1 237种,珍稀濒危和特有物种有63种。2)种子植物区系表征科是壳斗科、冬青科、紫金牛科、五加科、樟科和山茶科。3)种子植物区系属数的R/T值1.45,高于武夷山的R/T值(1.10),而低于梁野山的R/T值(1.66)和虎伯寮的R/T值(2.68)。4)与梁野山、武夷山、虎伯寮3个自然保护区相似性比较,在科级水平上相似性极高,均大于90%;在属级和种级水平上,与梁野山的相似性系数最高,分别是76.76%和61.86%。【结论】汀江源自然保护区植物种类丰富,珍稀濒危和特有物种较多;大科、大属优势现象明显,少种科、少种属数量占优势,区系分化较大,体现科属水平的多样性;区系地理成分复杂,联系广泛,起源古老,热带性质明显;在地理亲缘关系上该保护区种子植物区系与梁野山的联系最为密切,与虎伯寮的和武夷山的联系较为疏远,与其地处武夷山脉南段延伸支脉区域的地理位置相符合,具有从南亚热带向中亚热带过渡的明显特点。

【Objective】To provide scientific basis for the protection of biodiversity and evergreen broad-leaved forest in western Fujian.【Method】On the basis of field investigation and literature review,the floristic composition and distribution types of seed plants in Tingjiangyuan nature reserve were analyzed by using floristic geography principle,and the similarities between the flora of seed plants in Tingjiangyuan nature reserve and its adjacent three nature reserves were compared.【Result】1)There are 1237 species of wild seed plants belonging to 599 genera and 147 families in Tingjiangyuan Nature Reserve,and 63 species are rare,endangered and endemic.2)The floristic characterization families of seed plants are Fagaceae,Ilex,Purple Taurus,Acanthopanaceae,Lauraceae and Camelliaceae.3)The R/T value of genera of seed plant flora is 1.45,which is higher than that of original Wuyi mountain(1.10),but lower than that of Liangye Mountain(1.66)and Huboliao(2.68).4)Compared with Liangye mountain,former Wuyi mountain and Huboliao nature reserve,the similarity is very high at the level of family level,which is more than 90%.At the level of genera and species,the similarity coefficient with Liangye mountain is the highest,which is 76.76%and 61.86%respectively.【Conclusion】Tingjiangyuan nature reserve is rich in plant species,rare and endangered species and endemic species;the dominant phenomena of large families and genera are obvious,the number of few families and genera is dominant,the floristic differentiation is large,reflecting the diversity of families and genera;the floristic geographical composition is complex,widely related,the origin is ancient,and the tropical nature is obvious;Geographically,the seed plant flora of the reserve is most closely related to Liangye Mountain,and relatively distant from Huboliao and the former Wuyi Mountain.It corresponds to the geographical location of the extended branch area in the southern part of the Wuyi Mountains,and has the obvious characteristics of the transition from south subtropical to middle subtropical.