通过对秦岭南坡佛坪国家自然保护区地面生苔藓植物的调查，采用相似性系数、重要值、多样性指数对其进行物种多样性的研究。结果表明：29个样地内地面生苔藓植物共33科69属189种，包括苔类植物7科8属15种和藓类植物26科61属174种，其中青藓科是最优势的科。落叶阔叶栎(Quercus)林下地面生苔藓植物的物种多样性最高，其次是落叶阔叶桦(Betula)林带、竹林、针叶林和沟谷岩石，杜鹃(Rhododendron)灌丛带的最低。落叶阔叶栎林带和落叶阔叶桦林带的种相似性最高，杜鹃灌丛与其它植被带的种相似性都很低。研究表明秦岭南坡的佛坪国家自然保护区内，低山地区的落叶阔叶栎林带是该地区苔藓植物多样性的分布中心，是物种多样性保护的关键地带; 亚高山地区杜鹃灌丛带的苔藓植物物种多样性虽然不高，但种类明显不同于别的地带，所以也应是苔藓植物多样性保护值得注意的地带。
Background and Aims The species diversity of bryophytes in Qinling was rarely studied, especially at different vegetation types. The bryophytes on floor were investigation in Foping Nature Reserve which lies in at the south slope of Qinling. Answers to the following questions were sought. a) What is the composition of bryophytes on floor in Foping Nature Reserve? b) What were the dominant families of bryophytes at there? c) How is the species diversity of bryophytes in Foping Nature Reserve?
Methods A investigation of bryophytes on floor were done in Foping Nature Reserve. The 29 sites were chosen in representative place, and the plots were setted with systematic sampling. The species similarity coefficient, important value and species diversity indexes were examined at different vegetation types.
Key results A total of 189 floor species belonging to 69 genera of 33 families were founded. Among these species, there are 15 hepatics belonging to 8 genera of 7 families and 174 mosses belonging to 61 genera of 26 families, and Brachyth eciaceae is the most dominant family. The species diversity of floor bryophytes is the highest one in deciduous oak forest zone, and it reduced in deciduous birch forest zone, bamboo forest, coniferous forest, rocks in valley, and it is the lowest in Rhododendron shrubs. The similarities between deciduous oak forest zone and deciduous birch forest zone are highest, and the similarities between Rhododendron shrubs and other vegetation types are lowest.
Conclusions It is shown that deciduous oak forest zone is the center of bryophyte diversity and the key area for bryophyte diversity conservation. Rhododendron shrubs have different species from other areas, so it should be paid attention in Foping Nature Reserve at the southern Qinling Mountain.