【摘要】 在分析不同海拔珍稀濒危植物长苞铁杉林群落结构及物种重要值特征的基础上,应用物种多样性的丰富度指数、多样性指数、均匀度等指标测定珍稀濒危植物长苞铁杉群落不同海拔梯度物种多样性,分析长苞铁杉林物种多样性梯度变化效应。结果表明,长苞铁杉群落物种多样性梯度变化规律明显;尤其长苞铁杉物种受梯度效应影响显著,高海拔重要值明显高于中、低海拔;总体上物种多样性高,种类组成复杂,群落乔木层、灌木层、草本层和层间植物层次明显。更多还原

【Abstract】 The species diversity effect of Tsuga longibracteata community in different altitude gradients were measured by means of species evenness,species diversity index and species richness index,based on the analysis on the community structure and other important values.It was indicated that the species diversity in Tsuga longibracteata community is high in total;that being affected by the change law of gradient,the important values of Tsuga longibracteata in the high altitude is obviously higher than in the middle and low altitudes;that the species structure is complicated.The communities have four layers——tree stratum,shrub layer,lianas and herb layer.更多还原