云南罗平多依河景区苔藓植物区系研究

Bryoflora of Duoyihe Scenic Spot in Luoping County, Yunnan Province

摘要:

为了解云南罗平多依河景区的苔藓植物多样性和区系特征,对该区苔藓植物进行了调查,并对其区系地理成分进行了统计分析。结果表明,该区有苔藓植物34 科59 属116 种(含变种和亚种),其优势科、属均反映了该苔藓区系以温带成分为主,并有部分热带亚热带成分。苔藓区系的地理成分复杂,以北温带分布型(27.03%)、热带亚洲分布型(25.23%)、东亚分布型(19.82%)和中国特有分布型(10.81%)占优势;以热带成分、北方温带成分和东亚成分为主导,分别占34.23%、35.14% 和30.63%;反映了该苔藓植物区系温热并存且具有较高特有性的特征。与邻近13 个地区的苔藓区系进行对比分析,多依河苔藓植物区系的物种丰富度较高(排第8 位),与贵阳香纸沟的亲缘关系最近,这与两地相近的地理位置、海拔高度,以及相同的喀斯特河谷环境是分不开的。

Abstract:

In order to discuss the bryodiversity and bryoflora of Duoyihe Scenic Spot in Luoping County, Yunnan Province, the taxa and phytogeographical elements of the bryophyte were investigated and analyzed. The results showed that there were 116 species (including subspecies and varieties), belonging to 59 genera and 34 families in Duoyihe Scenic Spot. Both the dominant families and genera indicated that the bryoflora was mostly temperate elements with some subtropic and tropic elements. The areal-types were dominated by North Temperate (27.03%), Tropical Asia (25.23%), East Asia (19.82%), and endemic to China (10.81%); the dominant floristic elements are tropical elements (34.23%), northern temperate elements (35.14%) and eastern Asia elements (30.63%). Therefore, the characteristics of the bryoflora were that temperate and tropical elements coexist with high endemism. Compared with bryoflora in neighbouring 13 regions, the species abundance of Duoyihe was relatively high (ranked the eighth) and its bryoflora is the closest to Xiangzhigou karst areas in Yunnan-Guizhou Bryological Region due to the close geographic locations, the similar elevations and the same karst-river-valley environment in the two areas.