摘要
在对缙云山自然保护区蕨类植物进行详细调查和文献资料查阅的基础上,对其区系特征、与邻近保护区区系相似性、属种系数等进行了统计分析与比较.研究结果如下:(1)保护区共有蕨类植物38科74属153种;属种系数大,生境条件一致性高,区系丰富度小.(2)区系特征呈现出明显的热带性质;热带分布科19个,占总科数的50%,热带分布属43属,占总属数的58.11%;优势科、属不明显,单种科、单种属及古老孑遗植物数量多,说明区系特征及地质年代起源古老.(3)该保护区与贵州赤水自然保护区和重庆金佛山自然保护区蕨类植物组成及区系特征最为接近,关系最为密切,而与四川九寨沟和海子山自然保护区差异较大,关系疏远.这可能与保护区所处的地理位置、海拔和气候密切相关.
Based on a detailed survey of the Pteridophyta plants in Jinyun Mountain Natural Reserve of Chongqing and investigation of the related reference materials, their flora similarity, flora similarity with the Pteridophyta plants in the neighboring nature reserves and species coefficient were analyzed statistically. A total of 153 species, belonging to 38 families, 74 genera, were recorded in this natural reserve. The Pteridophyta plants were found to have a great species coefficient, high habitat coherence and small flora richness. Tropically-distributed families （19） accounted for 50% of the total and tropically-distributed genera （43） accounted for 58.11% of the total. No distinctly dominant families or genera were noticed and a great number of single-species families and genera were observed, indicating their ancient geological origin, which is characterized by ancient relict plants. Because of the differentiation of altitude, location and climate conditions, the composition and flora characteristics of Pteridophyta in Jinyun Mountain Natural Reserve were similar to those of Chishui Nature Reserve in Guizhou and JinFo Mountain Nature Reserve in Chongqing, but quite different from those of Jiuzhaigou and Haizi Mountain Nature Reserve in Sichuan.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第8期103-108,共6页
Journal of Southwest University(Natural Science Edition)
基金
重庆市自然科学基金计划资助项目(CSTC
2008BB5256)
国家自然科技资源平台资助项目(2005DKA21403)
关键词
缙云山自然保护区
蕨类植物
区系特征
Jinyun Mountain Nature Reserve
Pteridophyta
flora characteristics
