福建裸子植物区系研究

通过野外考察、查阅文献资料和应用植物区系分析方法对福建裸子植物进行研究，得出以下结论：(1)东南沿海的地理位置、显著的季风气候和占总面积50％以上的中山带山地使福建成为中国裸子植物重要的繁衍和保存地之一。(2)福建现代裸子植物有9科、24属、44种(其中含特有科1个为银杏科，特有属有水松、白豆杉、金钱松、杉木、银杏、台湾杉属等6属，拥有四川苏铁、银杏、油杉、华东黄杉、长苞铁杉、金钱松、黄山松、台湾杉、柳杉、水松、柏木、刺柏、三尖杉、粗榧、宽叶粗榧、白豆杉、穗花杉、榧树、罗浮买麻藤等26个特有种)，分别占中国同类的90．0％、70．59％和19．13％，是中国裸子植物区系的重要组成部分。(3)古植物学资料和现存的古老、孑遗和特有成分说明福建裸子植物区系起源古老；福建裸子植物的属级分布区类型中泛热带成分占25．0％，亚热带至温带成分占75．0％(其中亚热带分布占41．67％)；种的分布亚型中，亚热带分布的占67．10％；均表明福建裸子植物区系具有较为显著的亚热带山地性质。(4)长苞铁杉、杉木、柳杉、福建柏、黄山松、马尾松、油杉、江南油杉、红豆杉、南方红豆杉、粗榧、穗花杉、高山柏等树种分布于海拔800m以上的亚热带中山带。(5)种的分布亚型中，有35种分布在南岭，进一步证明南岭既为西南核心区的亚热带成分向华中、华东迁移提供通道，又为热带亚洲(中南半岛、云贵高原南部)成分向福建、浙江与台湾分布提供了途径。(6)福建裸子植物武夷山脉、闽台陆桥或东山陆桥与周边地区彼此密切交流，相似性系数分析也表明，福建裸子植物区系与华南、西南、华东、华中、台湾等区域联系广泛、关系密切。

A Floristic Analysis on the Gymnosperms of Fujian Province

In this paper, fieldworking,literature and data consulting,floristic analysis method have been taken through the research of the gymnosperms of Fujian Province. Those conclusions may be drawn as follow: (1) Being located in the south-eastern part of China along the coast,belonging to typical monsoon climates and above 50% mountainous landforms made Fujian suitable for living and breeding of plants.(2) The gymnospermous flora of Fujian Province consists of 9 families, 24 genera and 44 species(including one endemic family,six endemic genera and 26 (ende-)(mic) spcies), accounting 90.0%,70.59% and 19.13% for corresponding taxa of China, being an important part of the gymnospermous flora of China, too.(3) The data of palaeobotany and age-old,relict,endemic compositions illustrates that the origin of gymnospermous flora of Fujian is age-old; Through geologic distribution analysis of genera types and species subtypes, there are a few the genera tropical composition (only 25.0%), and abundant of the subtropical to temperate ones(up to 75.0%,41.67% in which are subtropical compositions); there are 67.10% subtypes of subtropical species, the results show that gymnospermous flora of Fujian has notable subtropical mountainous character and may be from the subtropical mountains of China.(4) About 30% species such as Tsuga. longibracteata,Fukienia hodginsii,Pinus taiwanensis,Cryptomeria fortunei,Cunninghamia lanceolata et al, are distributed in the mountainous landforms. (5) Among species areal-types, there are 35 species distributed in Nanling Mountains, Nanling mountains not only provides migration passageway for the subtropical compositions of southwest core region, supplies path for tropical compositions of Trop. Asia also; (6) The gymnosperms of Fujian Province is interacting with areas being connected with Fujian Province through Wuyi Mountains and Fujian-Taiwan land bridge, The outcome of coefficient of similarity analysis also indicates that there is closely relationship between gymnospermous flora of Fujian and those of S China, SW China, E China, C China, Taiwan of China.