Characteristics of Plant Diversity in Chuona River Reserve,Daxing'anling Mountains
Exploring the coupling relationship among stand structure,site conditions,protection intensity,and plant diversity is helpful to improve the effect of plant diversity protection in protected areas.Based on this,the forest community of the Chuona River National Nature Reserve in Daxing'anling Mts was selected as the research object,the plant diversity and stand structure characteristics of the arbor,shrub,and herb layers were investigated,and the soil samples were collected and the soil physicochemical properties were determined.The frequency distribution,redundancy ranking and variance analysis were used to reveal the characteristics of plant diversity and its coupling relationship with influencing factors.The results showed that:(1)Larix gmelinii was the dominant tree species in the tree layer of Chuona River Reserve,with a relative abundance of 64.35%,followed by Betula platyphylla.The proportion of lingonberry(Vaccinium vitis-idaea)in shrubs was the highest,reaching 72.70%.A total of 77 herbs were recorded,of which Carex callitrichos accounted for the largest proportion(23.72%).(2)The order of richness index and diversity index was herb layer>arbor layer>shrub layer,and the shrub layer had the highest evenness index.(3)Redundancy analysis and variance decomposition analysis showed that the independent effects of stand structure explained the most changes in plant diversity.Herbaceous coverage,shrub density,tree height and soil bulk density were most closely related to plant diversity changes.Adjusting stand structure would be a simple and reliable way to improve plant diversity,and the above results provided data support for stand management in Daxing'anling Mts.
species diversitystand structuresite conditionsredundancy analysis
万方数据
维普
