四川西部地区苔藓植物区系研究

Research on the Bryoflora in the West of Sichuan Province,China

通过对四川西部甘孜、凉山地区(川西地区)苔藓植物的调查和已有研究资料的整理,经统计分析,结果表明:(1)川西地区有苔藓植物57科、150属和302种(含种以下等级、不含栽培种);(2)川西地区苔藓植物科、属、种组成丰富;(3)川西地区苔藓植物地理成分复杂,联系广泛、分布交错,其中以北温带成分为主,占总种数的34.75%,东亚成分次之,占24.47%;(4)川西地区苔藓植物区系中各类温带性质的区系成分共计184种,占总种数的65.25%,表明该植物区系具有明显的温带性质;(5)东亚成分中,中国-喜马拉雅与中国-日本两个变型成分的总和为63种(91.30%),远远超过了典型的东亚成分6种(8.70%),表明该区东亚成分具有明显的过渡性。

The bryoflora in Ganzi and Liangshan areas of Western Sichuan were through preliminarily studied field investigations and literature references. The results have shown that： （ 1 ） There are 302 species （ including infraspecific taxa, but excluding the cutivar） , which belong to 57 families and 150 genera ; （2） These areas are rich in species , genera and families; （ 3 ） The geographical elements of bryoflora in the west of Sichuan are greatly intricate, staggered and widely related. The ones existing in the north temperate elements make up the majority, about 34.75%. The next is the East Asian elements, accounting for 24. 47% ; （4） All temperate elements, without including 53 endemic species to China and 20cosmopolitans, add up to 184 species, which take 65.25% of all the bryoflora in the west of Siehuan, exhibiting the mossflora of Western Sichuanhas an obviously temperate character; （5）In East Asian elements, two regions （ Sino-Himalaya area and Sino-Japan area） account for the most, about 91.30%, ceeding greatly exceeding the representative regions ,which are only about 8.70%. It is proved that the East Asian dements in these areas have the transitional characteristics from Sino-Japan region to Sino-Himalaya region.