北京东灵山苔藓植物区系研究

Research on the bryoflora of Dongling Mountain,Beijing,China

在野外调查和采集标本的基础上,对北京东灵山苔藓植物区系成分及特点进行研究。结果显示,该地区共有苔藓植物27科64属150种(含2变种),其中32种为北京苔藓植物新记录。优势科为青藓科(Brachytheciaceae)、丛藓科(Pottiaceae)、灰藓科(Hypnaceae)、真藓科(Bryaceae)和绢藓科(Entodontaceae)5科;优势属为青藓属(Brachythecium)、绢藓属(Entodon)、紫萼藓属(Grimmia)、真藓属(Bryum)、金灰藓属(Pylaisia)、凤尾藓属(Fissidens)、美喙藓属(Eurhynchium)和毛口藓属(Trichostomum)8属。区系分析表明,东灵山苔藓植物区系地理成分以北温带成分为主(占36.7%)、东亚成分次之(占18.0%)。通过与我国15个地区苔藓植物区系谱主成分分析发现,东灵山苔藓植物区系成分与雾灵山、小五台山与贺兰山相近,与云蒙山最为接近。

The comp osition and characteristics of the b ryoflora of Dong ling Mountain in Beijing were stud ied b ased on field surveys and sp ecimen collection. Results showed that150 sp ecies of b ryop hytes（includ ing two varieties） b elong ing to 64 g enera and 27 families were record ed from Dong ling Mountain,of which 32 sp ecies were newly record ed for Beijing. Brachytheciaceae,Pottiaceae,Hypnaceae,Bryaceae,and Entodontaceae were the dominant families. Brachythecium, Entodon, Grimmia, Bryum, Pylaisia, Fissidens,Eurhynchium,and Trichostomum were the dominant genera. Analysis of the geographical elements of the bryophytes showed that the North Temperate element was dominant（36. 7%）,followed by the East Asia element（18. 0%）. Based on the principal component analysis（PCA） of the main components of bryophytes in 15 regions of China,we found that the bryophytes of Dongling Mountain were most similar to those of Wuling Mountain,XiaowutaiMountain and Helan Mountain,and closest to those of Yunmeng Mountain.