陕西天华山自然保护区苔藓植物区系研究

根据调查和参考有关文献，对陕西天华山自然保护区苔藓植物区系进行了初步分析，结果表明：种类丰富，本区共有苔藓植物46科95属180种（包括种下类群）。其中苔类植物14科18属37种。藓类植物32科77属143种；优势科为青藓科、提灯藓科、丛藓科、羽藓科、真藓科、绢藓科和灰藓科，优势属为提灯藓属、真藓属、青藓属、光萼苔属、绢藓属、灰藓属、凤尾藓属、丛本藓属、缩叶藓属、羽藓属和仙鹤藓属；地理成分复杂、多样。区系联系广泛；种的地理成分统计分析表明。温带成分占绝对优势。热带成分也占有一定比例，反映了本区苔藓植物区系的热带亲缘性；东亚成分也占有重要地位，有42种，其中中国-日本分布有15种；中国特有种有16种，中国特有分布中以西南区系成分为主。本区苔藓植物区系隶属于华中地区，但兼有多种成分。体现本区苔藓植物区系的南北过渡特征。

Bryoflora in Tianhuashan Mountain Nature Reserve of Shaanxi

The bryoflora in Tianhuashan Mountain Nature Reserve of Shaanxi were preliminarily studied through field investigations and literature references,and this shows that the reserve has abundant and diverse bryoflora,which number 180 species,95 genera and 46 families (including infraspecific taxa),of which,the liverworts total 37 species,18 genera and 14 families,and the true mosses total 143 species,77 genera and 32 families;its dominant families are Brachytheciaceae,Mniaceae,Pottiaceae,Thuidiaceae,Bryaceae,Entodontaceae and Hypnaceae,and its dominant genera are Mnium,Bryum,Brachythecium,Porella,Entodon,Hypnum,Fissidens,Anoectangium,Thuidium and Atrichum.Its geographical elements are intricate,diverse and widely related;the statistical analysis of the geographical elements of its species reveals that it has an absolutely dominant majority of temperate elements and a proportion of tropical elements,which reflects that the bryoflora of the reserve have tropical bloods;its east Asian elements also take an important position,numbering 42 species of which 15 species belong to Sino-Japan areal,16 species are endemic ones in china,which are mainly composed of the flora of southeast China areal.The bryoflora of the reserve belong to Central China but include many elements of other areas,and this shows the transitional characteristics of the bryoflora of the reserve from south to north.