印江洋溪自然保护区苔藓植物区系研究

Study on the Bryoflora of Yangxi Nature Reserve at Yinjiang

通过野外调查与采集,采得苔藓植物标本1000余份。经室内鉴定,印江洋溪自然保护区苔藓植物共计58科130属323种(含亚种、变种),优势科、属均反映了该区系由温带向热带过渡的性质。区系成分分析表明:该区东亚成分为主,占总种数的37.73%,具温带性质的成分占总种数的25.64%,具热带性质的成分占总种数的23.81%,反映了印江洋溪自然保护区苔藓植物区系成分具有东亚色彩浓厚、温热并重的特征。通过对印江洋溪自然保护区与其他8个地区的苔藓植物区系比较发现,印江苔藓植物区系丰富度排列第七,Si=-0.3393。聚类分析结果表明,印江洋溪与云贵区的鸡足山、麻阳河和华东区的阳际峰苔藓植物区系关系最为密切,与岭南区的尖峰岭苔藓植物区系关系最为疏远。

Bryophytes in Yangxi nature reserve at Yinjiang was investigated by field study and collection.About 1000 specimens of bryophytes were collected.323 species belonging to 130 genera and 58 families were identified.The dominant families and genera showed that the bryophytes of Yinjiang were transited from temperate to tropic.The phytogeographical element analysis showed that this area was dominated by East Asia element,which accounted for 37.73％,followed by Temperate element （25.64％） and Tropical element （23.81％）.The result suggested that Yinjiang nature reserve possessed with strong eastern Asia characteristics,and had equal temperate and tropical elements.The species abundance ranked seventh when compared with other eight zones.Hierarchical cluster analysis of the nine zones showed that the bryophytes of Yangxi were well connected with Jizu Mountain,Mayang River in Yungui Region and Yangji Peak in Huadong Region,while that with Jianfengling in Lingnan Region was the most estraged.