基于功能群性状的伊犁河谷那拉提山地草甸群落组合定量分析

Quantative Analysis of Nalati Sub-Alpine Meadow Community Compositions in Yili Valley on Basis of Functional Traits

选择伊犁河谷新源县那拉提山地草甸群落割草地实验区进行调查采样,基于草地群落物种多样性组合将其划分为禾草类、豆科类和杂草类,将功能群性状划分为多度、高度、盖度和生物量,研究结果概括如下:群落尺度功能群多样性Shannon-Wiener指数年际变化显著(P<0.05)。禾草类的多度、高度、盖度和生物量年际变化不显著(P>0.05);杂草类的多度和高度年际变化显著(P<0.05),盖度和生物量年际变化不显著(P>0.05);豆科类的多度年际变化显著(P<0.05),高度、盖度、生物量年际变化不显著(P>0.05)。禾草类的相对高度、相对盖度、相对生物量分别显著(P<0.01)大于杂草类和豆科类的相应值,杂草类的相对多度显著(P<0.01)大于禾草类和豆科类的相对多度。禾草类SDR显著度显著(P<0.01)大于杂草类SDR和豆科类SDR;杂草类SDR显著(P<0.01)大于豆科类SDR。

The research selected the Nalati alpine meadow community in Xinyuan County of Yili valley as experimental site, classified community diversity compositions as herb ,forb and legume on the basis of the functional groups and grouped functional traits as abundance, height, cover and biomass, the research results showed as following.The community scale Shannon-Wiener indices of the functional groups varied significantly （P〈0.05） interannually. The abundances, heights, covers and biomass of the herb varied insignificantly （P〉0.05）interannually; the abundances and heights of the forbs varied significantly （P〈0.05）interannually ,the covers and biomass of the forbs varied insignificantly （P〉0.05）interannually ;the abundances of the legumes varied significantly （P〈0.05）interannually, heights, covers and biomass of the legumes varied insignificantly （P〉0.05）interannually. The relative heights,relative covers and relative biomass of the herbs were significantly （P〈0.01）higher than those of the herbs and legumes respectively, the relative abundances of the forbs were significantly （P〈0.01）higher than those of the herbs and legumes. The SDR of the herbs were significantly （P〈0.01） higher than those of the forbs and legumes ;the SDR of the forbs were significantly （P〈0.01）higher than those of the legumes.