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Analysis of the Plant Community Diversity in the Periglacial Landforms in Wutai Mountain,Shanxi Province

Wutai Mountain is locates in the northeastern part of Shanxi province.Its highest peak,3 061 m a.s.l.,is also the highest peak in north of China and,therefore,nicknamed "the roof of northern China".Based on the Two-Way Indicators Species Analysis,the seven periglacial landform plant communities in the Wutai Mountain can be divided into thirteen group clumps.The different periglacial landform plant community types' composition multiplicity has obvious difference.According to the distribution of different periglacial landform,the thirteen group clumps can be sub-divided into the common group clumps and the exclusive group clumps.In addition,richness indexes,species diversity indexes and evenness indexes are used to analyze the seven periglacial landform plant community comprehensive diversity index in the Wutai Mountain.The results show that species diversity indexes of the seven periglacial landform plant communities in the Wutai Mountain can be ranked as turf≥blockfieldstone circlecryoplanationstone streamtorsolifluction lobe.The main factors,which control the periglacial landform community species diversity index in the Wutai Mountain,are altitude,thickness of soil layer,water and heat.Comparing with those communities in the same latitude' mountains in China,one can see that the Wutai Mountain's subalpine meadow and periglacial landform vegetation are most abundant.Moreover,the species composition of vegetation in the mountain has a certain particularity.The in-depth study of the relationship between the regional vegetation distribution and periglacial landform environment not only contributes to reasonable protection and development of Wutai Mountain's periglacial landform plant resources,but also has practical significance in eco-tourism.