Plant Community Patterns and Driving Factors in High-altitude Cold Environments in the Shuanghu Area of Northern Xizang
This study investigated plant community composition,distribution patterns and their driving factors,and stability of plant communities in the Shuanghu area of the Qiangtang Plateau,northern Xizang.Beta-flexible clustering,detrend correspondence analysis(DCA),canonical correspondence analysis(CCA),and generalized linear regression analyses of species richness and environmental factors were employed on 45 sampling points.Additionally,the stability and growing trend of plant communities was assessed based on niche characteristics,relative resource occupancy,and ecological response rate of domi-nant species.The results showed that:(1)A total of 153 plant species were documented,belonging to 92 genera and 34 families.Asteraceae,Cyperaceae,and Brassicaceae were the dominant family,while Carex,Saussurea,and Oxytropis were the dominant genera.(2)Beta-flexible clustering identified five dis-tinct communities:Stipa purpurea community,Sibbaldianthe bifurca community,Leontopodium pusillum community,Dasiphora dryadanthoides community,Carex alatauensis community.(3)DCA,CCA,and generalized linear regression analyses revealed that hydrothermal conditions were the primary divers of com-munity structure,distribution patterns,and species richness.(4)The Stipa purpurea and Dasiphora dry-adanthoides communities exhibited signs of instability,with dominant species potentially outcompeting dominants in other communities.Conversely,Sibbaldianthe bifurca,Leontopodium pusillum,and Carex alatauensis associations displayed greater stability,with minimal shifts in dominant species composition.
Community structureSpecies richnessNicheShuanghu areaEcological response
万方数据
维普
