摘要
通过多次野外调查及资料整理,对诸广山地区石松类和蕨类植物的资源组成、地理成分、生态环境等方面进行了分析研究。结果显示:(1)诸广山地区共有石松类和蕨类植物37科、87属、249种,优势科为鳞毛蕨科、水龙骨科、金星蕨科、蹄盖蕨科、凤尾蕨科,优势属为鳞毛蕨属、凤尾蕨属、复叶耳蕨属、卷柏属,单种科有12个,单种属有39个,这些丰富度高的蕨类中既有古老孑遗种又有新生代年轻种,反映了该区蕨类植物的古老性与延续性。(2)从分布区类型来看,该区石松类和蕨类植物区系中以热带性质的科和属占绝对优势,分别占除世界分布类型外总科、属数的89. 3%和77. 6%,以泛热带分布类型为主。但种的地理成分复杂,温带成分略显优势,占50. 6%,以东亚分布类型为主,中国特有分布种占23. 3%;热带成分的种占26. 1%,以热带亚洲分布类型为主。表明该蕨类植物区系具有热带亲缘性,是明显的热带向温带过渡地段。(3)该区以土生蕨类群落类型为主,树生蕨类与石生蕨类随海拔升高而增多,物种丰富度在800-1 500 m处最高。
Based on the field investigations and data references,the resource composition,floristic phytogeography and eco-environment of pteridophytes in Mt.Zhuguangshan were analyzed in this paper.The main results were as follows:(1)there were 249 species of 87genera belonged to 37 families in the area,and 12 families and 39 genera contained single species.The dominant families were Dryopteridaceae,Polypodiaceae,Thelypteridaceae,Athyriaceae and Pteridaceae,and the dominant genera were Dryopteris,Pteris,Arachniodes and Selaginella.Both ancient and new generation species were involved,reflected the antiquity and continuity of pteridophytes in the area.(2)It showed that the family and genus had stronger tropical nature in the lycophytes and ferns flora,accounted for 89.3%of the total family and 77.6%of the total genus(no including cosmopolitan),respectively,and pantropic type was the main element.However,the flora of species with compound floristic elements has obvious temperate component,accounted for 50.6%and mainly distributed in East Asia.Moreover,the endemic to China species was abundant and accounted for 23.3%.Conversely,the tropical Asia element was dominant in tropical elements and account for 26.1%.This indicated that the pteridophyte flora had a tropical affinity and was a transition from tropical to temperate.(3)The ecotype of terrestrial pteridophytes was dominant in this area,and the number of epiphytic and lithophytic pteridophytes increased with raised altitude.In addition,the species richness was highest between 800-1 500 m in this area.
作者
姬红利
詹选怀
彭焱松
桂忠明
张丽
Ji Hongli;Zhan Xuanhuai;Peng Yansong;Gui Zhongming;Zhang Li(The Key Laboratory of Plant Ex-situ Conservation and Utilization of Jiangxi Province/Lushan Botanical Garden,Jiangxi Province and Chinese Academy of Sciences,Jiujiang 332900,China)
出处
《中国野生植物资源》
2018年第5期49-55,共7页
Chinese Wild Plant Resources
基金
中国科学院重点部署项目(KFJ-3W-No1-143)
江西省自然科学基金项目(2008GZN0052)资助
关键词
蕨类植物
区系地理
生态环境
诸广山
Pteridophytes
floristic phytogeography
eco-environment
Mt.Zhuguangshan
