中文摘要：

苔藓是森林的重要组分,是森林保护区的重要保护对象,在物种资源和生态系统功能维护中有重要作用。该研究以浙江西天目山国家自然保护区内7种主要森林类型（落叶矮林、落叶阔叶林、常绿-落叶阔叶混交林、常绿阔叶林、针阔混交林、针叶林和竹林）内的苔藓植物为对象,调查了32个10m×10m的样地,记录地面生苔藓植物盖度和树附生苔藓植物多度,采用重要值、相似性系数、多样性指数分析了森林类型间的苔藓植物多样性差异。共采集969份标本,隶属41科84属142种,其中苔类植物13科18属33种,藓类植物28科66属109种,优势科为灰藓科、青藓科和羽藓科。2种混交林（常绿-落叶阔叶混交林和针阔混交林）的物种丰富度和多样性指数均高于其余5种森林,其中物种丰富度以针阔混交林最高,苔藓植物多样性则以常绿-落叶阔叶混交林最高,竹林两者均为最低。海拔等环境因子较为接近的植被类型的苔藓植物多样性相似性较高,常绿阔叶林与针叶林相似性最高,而落叶矮林和竹林相似性最小。

英文摘要：

Aims Bryophytes are an important component of forest vegetation. Their species diversity is vital to protecting plant resources and ecosystem diversity. Our objective was to explore the diversity and distribution of bryophytes and the relationship between bryophyte diversity and environment factors in seven dominant forest vegetation types （deciduous broad-leaved shrubs, DBS; deciduous broad-leaved forest, DBF; evergreen and deciduous broad-leaved mixed forest, EDF; evergreen broad-leaved forest, EBF; coniferous broad-leaved mixed forest, CBF; coniferous forest, CF; bamboo forest, BF） of West Tianmu Mountain, Zhejiang Province, China. Methods Thirty-two sites （10 m × 10 m） were established in the seven forest vegetation types. Sixteen plots were selected by systematic sampling in each sampling site. Coverage of floor bryophytes and abundance of epiphytic bryophytes of each site were recorded. Species richness, importance value, diversity index and S rensen’s similarity index were examined at the different vegetation types. Important findings Based on collection and identification of a total of 969 specimens, we recorded 142 bryophytes belonging to 82 genera and 41 families, among which were 33 liverworts belonging to 18 genera of 33 families and 109 mosses belonging to 66 genera of 28 families. Hypanceae, Brachytheciaceae and Thuidiaceae were three dominant families. The species richness and diversity of bryophytes in two kinds of mixed forest types （EDF and CBF） were higher than the five pure forest types （DBS, DBF, EBF, CF and BF）. EDF had the highest species diversity and CBF had the highest species richness. BF was lowest in both diversity and richness. There was high similarity between environment factors such as neighboring altitudinal forest types, with the highest value between EBF and CF, and the lowest value between DBS and BF. The number of microhabitats showed significant positive correlation with floor bryophyte diversity.