江西云居山自然保护区蕨类植物区系

Fern flora of yunjushan nature reserve in jiangxi province

2012年对江西省云居山自然保护区蕨类植物资源进行调查,总共记录该地区蕨类植物29科54属102种。结果表明:(1)该区蕨类植物中优势科、属十分明显,其中优势科包括:鳞毛蕨科(15种,14.71%)、水龙骨科(14种,13.73%)、金星蕨科(13种,12.75%)和蹄盖蕨科(13种,12.75%);(2)从蕨类植物地理成分分析可见,属的热带成分多于温带成分,具有一定的热带亲缘,世界广布属为16个;但蕨类植物种的区系成分温带性明显高于热带性,且以东亚分布为主,热带成份中以泛热带成份为主,热带亚洲成份次之;(3)中国特有属缺乏,但中国特有种丰富;(4)云居山蕨类植物区系起源古老,是江西蕨类植物多样性的重要分化和保存中心之一。

A series of extensive field investigations were carried out in Yunj ushan Nature Reserve,Jingxi Province in 2012.102 species were recorded totally,which belonged to 54 genera and 29 families.A detailed floristic analysis showed as followed：（1 ）In this flora,the dominant families consisted of Dryopteridaceae （15 species,14.71%）,Polypodiaceae（14 species,13.73%）,Thelypteridaceae（13 species,12.75%）,and Athyriaceae（13 species,12.75%）.（2）The amounts of the tropic,cosmopolitan and temperate genera in the flora of Yunjushan Nature Reserve were 30,16 and 8,respectively.There was no genera endemic to China. （3）The percentages of the temperate,tropic,endemic to China and cosmopolitan elements were 67.65% , 28.43%,16.17% and 3.92%,respectively in the flora of Yunjushan Nature Reserve.（4）Yunjushan Na-ture Reserve should be an important diversity and conservation center of Jiangxi fern.