科尔沁沙地松树山地区苔藓植物物种多样性与分布特征分析

通过标本采集和群落调查,探明科尔沁沙地松树山地区有苔藓植物76种(包括变种和亚种),可归为苔类(9种)和藓类(67种)两个大的类群,隶属于21科、41属;可划分为7种区系地理成分,以北温带成分、世界广布种和东亚成分为主要区系成分, 分别有48种、12种和8种。石缝土层、岩面、树干小生境苔藓植物群落丰富,少数物种局限分布在一种小生境中,多数物种同时分布在两种以上小生境中。维管植物群落共有地面生苔藓植物39种,优势种有双色真藓(Bryum dichotomum)、土生对齿藓(Didymodon vinealis)、小疣冠苔(Mannia triandra)、西伯利亚疣冠苔(Mannia sibirica)、褶叶青藓(Brachythecium salebrosum)。随着水分条件改善,地面苔藓植物群落优势种构成发生有规律地变化,顶蒴藓类→顶蒴藓类+叶状体苔类→叶状体苔类+顶蒴藓类→侧蒴藓类+叶状体苔类+顶蒴藓类。认识群落随水分条件变化的特征对从更大尺度上认识苔藓植物结皮层形成和维持有重要参考价值。

Species Diversity and Distribution of Bryophytes in Songshushan Region of Horqin Sandy Land

Based on quadrat and community investigation in 2006 and 2008,76 species(including subspecies and varieties) of bryophytes were discovered in Songshushan region in Horqin Sandy Land,which can be classified into 2 taxonomical groups,namely liverwort(9 species) and mosses(67 species).These species are attached to 21 families and 41 genera,and can be categorized into 7 flora types,the majority of which are attached to North Temperate flora(48 species),Cosmopolitan flora(12 species),and East Asia flora(8 specie...