宜州会仙山景区苔藓植物的主要类群及其区系分布特征

The Main Groups of Bryophytes and Their Floristic Distribution Characteristics in Huixian Mountain Scenic Area of Yizhou

摘要: 为了探究宜州会仙山景区苔藓植物的主要类群及其区系分布特征，以便为当地苔藓植物多样性研究及资源开发利用提供基础数据，本研究采用样线调查法，先后在不同季节对宜州会仙山景区的苔藓植物进行实地调研，共采集了实物标本300多份。通过形态结构观察，共鉴定出苔藓植物19科26属44种，其中优势科是丛藓科和绢藓科，优势属是凤尾藓属、小石藓属和绢藓属，优势种是薄壁卷柏藓、卷叶湿地藓和黄色真藓，它们共同构成了会仙山景区苔藓植物的主要类群。该调查区域苔藓植物的区系分布可划分为7个类型，即世界分布、泛热带分布、热带亚洲分布、北温带分布、东亚与北美洲间断分布、东亚分布、中国特有分布，其中东亚分布与北温带分布的占比最大。由此可见，宜州会仙山景区苔藓植物的区系成分比较简单，具有从热带向温带过渡的特点。

Abstract: To investigate the main groups of bryophytes and their floristic distribution characteristics in Huixian Mountain Scenic Area of Yizhou, and provide basic data for the study of local bryophyte diversity and resource development and utilization, this study adopted the line transect method to conduct field surveys on bryophytes in Huixian Mountain Scenic Area of Yizhou in different seasons. A total of over 300 physical specimens were collected. Through morphological identification methods, a total of 44 species of bryophytes belonging to 26 genera in 19 families were identified. The dominant families were Pottiaceae and Entodontaceae, the dominant genera were Fissidens, Weissia, and Entodon, and the dominant species were Racomitrium tenerum, Hyophila involuta, and Bryum flavum, which together constituted the main groups of bryophytes in Huixian Mountain Scenic Area. The floristic distribution of bryophytes in this survey area can be divided into 7 types, namely cosmopolitan distribution, pantropical distribution, tropical Asian distribution, North temperate distribution, East Asia-North America disjunct distribution, East Asian distribution, and Chinese endemic distribution. Among them, East Asian distribution and North temperate distribution accounted for the largest proportion. It can be seen that the floristic composition of bryophytes in Huixian Mountain Scenic Area of Yizhou is relatively simple, with the characteristics of transition from tropical to temperate zones.