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大巴山自然保护区蕨类植物的区系分析
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摘要:
在野外调查并查阅相关资料的基础上,对大巴山国家级自然保护区蕨类植物资源进行了初步研究.结果表明:(1)大巴山自然保护区分布有蕨类植物共38科,包括92属339种(含变种和变型).(2)该保护区中的蕨类植物的优势科、优势属均表现明显,优势科为水龙骨科、蹄盖蕨科、鳞毛蕨科和金星蕨科;优势属为瓦韦属、铁角蕨属、鳞毛蕨属和假瘤蕨属.(3)科的分布区类型有8个,以泛热带分布和北温带分布为主,它们分别占本区总科数的53.84%和19.23%.(4)属的地理成分组成复杂,具有13个分布区类型,其中热带成分占总属数的62.49%,且以泛热带分布和热带亚洲分布型属为主;温带成分占总属数的32.96%,且以北温带分布和东亚分布为主.在中国植物区系的分区上属泛北植物区,中国-日本森林植被亚区,处于华中植物区和华南植物区的过渡区域.(5)通过与我国8个山地蕨类植物区系的比较,该区与湖北神龙架、四川卧龙、湖南云山和贵州梵净山的区系成分较为相近,可划为同一自然区,而与陕西秦岭、广西十万大山、云南西双版纳和广东车八岭的区系关系则较为疏远.
关键词:  蕨类植物  区系成分  分布区类型  大巴山自然保护区
DOI:
投稿时间:2006-09-24
基金项目:国家自然科学基金
Analysis of pteridophyte flora of Dabashan Nature Reserve
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Abstract:
The flora of pteridophyte in Dabashan Nature Reserve was investigated and analyzed.The results are as follows:(1)The pteridophytes species is rich in this Nature Reserve,with 339 species of pteridophytes of 92 genera in 38 families.(2)Results of statitstic analysis reveal that,in this flora,the dominant families consist of Polypodiaceae,Athyriaceae,Dryopteridaceae and Thelypteridaceae;the dominant genera consist of Lepisorus,Asplenium,Dryopteris and Phymatopsis.(3) The areal-types of family are 8,in which,the pantropical ones and North temperate ones are the main ones,and each of them occupy 53.84% and 19.23%,respectively.(4)There are 13 areal-types of genera with compound floristic elements,among them,the pantropic and tropical-Asia ones which belong to the tropical type are the main ones,occupy 62.49% of the total,the temperate ones whose key elements are the North temperate and Eastern-Asia ones occupy 32.96%.In terms of the floristic zone,the fiora in Dabashan Natrue Reserve is a transitional type between the Middle-China and South-China areas.(5)The flora shows a close relation with those of Shenlongjia,Wolong,Yunshan and Fanjingshan and farther relation with those of Qinling,Shiwandashan,Xishuangbanna and Chebaling.
Key words:  pteridophytes  flora elements  distribution-type  Dabashan Nature Reserve

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