广西中越边境喀斯特地区叶附生苔类植物物种多样性研究

Study on Species Diversity of Epiphyllous Liverworts in Karst Region of Guangxi-Vietnam Border

摘要:

为了解日益恶化的喀斯特环境下叶附生苔类植物的分布状况，对广西中越边境喀斯特地区叶附生苔类植物多样性展开调查。结果表明，广西中越边境喀斯特地区有叶附生苔类植物5科15属43种，其中，九洲疣鳞苔（Cololejeunea yakusimensis）、巴氏薄鳞苔（Leptolejeunea balansae）、斯氏唇鳞苔（Cheilolejeunea streimannii）、麦氏细鳞苔（Lejeunea micholitzii）、巨齿细鳞苔（L.kodamae）和纤细细鳞苔（L.exilis）为广西苔藓植物新记录。该地区叶附生苔类植物区系具有热带性质和东亚分布特点。与邻近地区比较，该地区叶附生苔类植物与贵州茂兰的亲缘关系和区系关系最紧密。该地区叶附生苔类植物分布随海拔增加呈增加趋势。那坡老虎跳保护区、龙州和宁明弄岗保护区以及靖西龙邦镇风水林是叶附生苔类植物分布最丰富的地区，因此，建议应对这些地区的叶附生苔类植物进行优先保护。

Abstract:

In order to reveal the distribution of epiphyllous liverworts in the fragile karst environment, the diversity of epiphyllous liverworts were investigated in karst region of Guangxi-Vietnam Border. The results showed that there were forty-three species of epiphyllous liverworts, belonging to 15 genera and 5 families in the karst region. Among them, six species, such as Cololejeunea yakusimensis, Leptolejeunea balansae, Cheilolejeunea streimannii, Lejeunea micholitzii, L. kodamae and L. exilis, are newly recorded from Guangxi. The epiphyllous liverworts flora of the karst region showed strong tropical and East Asian distribution character. There were the highest similarity between the karst region and Maolan Nature Reserve in species diversity and floristic relationship among seven neighbor areas. The distribution of epiphyllous liverworts in the karst region increased along the altitude. The species diversity of epiphyllous liverworts was rich in Laohutiao Nature Reserve, Nonggang Nature Reserve, and the Fengshui forests in Longbang Town, Jingxi County. Therefore, it was suggested that these areas would be priority protected for epiphyllous liverworts diversity in the future.