不同海拔梯度对小嵩草植物群落的影响

海拔梯度被认为是物种多样性分布格局的决定因素之一。不同海拔梯度群落间的相异性反映群落间环境的异质性,进而影响着植物群落的分布与物种多样性。该研究采用样线法对不同海拔小嵩草群落的数量特征、生物多样性等进行了研究,结果表明物种的生物量、物种数及多样性指数均随海拔的升高先增大后减小,在中海拔梯度处达到最大值,生态优势度却随海拔的升高而增大,呈线性变化。

Effect of Different Altitudes on Kobresia pygmaea Community

The altitude gradient is considered one of the determining factors of species diversity distribution pattern.Different altitudes communities diversity not only reflects the community environmental heterogeneity,and affects the distribution of plant community and species diversity.The quantitative characteristics and biodiversity of the community was researched by line method for different elevations in Kobresia pygmaea community.The results showed that biomass,species,species richness and diversity index increased,and then decreased with increasing in elevation gradient,reaches its maximum value in middle altitude,ecological dominance but increase with rising of elevation and linear changing.