摘要
用比较样地法调查了乌拉盖草原9个不同群落类型的α多样性特征。结果表明:(1)物种数随取样面积增加呈对数增加,且与对数模型S=alnA+b能够很好拟合(R2≥0.9715)。(2)不同群落类型的α多样性测度值(丰富度指数、多样性指数、均匀度指数),都表现出山地草甸类"羊草+线叶菊+杂类草"类型、温性草甸草原类"羊草+杂类草"类型、山地草甸类"羊草+杂类草"类型具有较高的多样性指数,而低地草甸类"羊草群落"类型拥有较低多样性指数。(3)群落的多样性更多的受均匀度指数的影响。
The traits of α diversity of nine different plant communities in WuLaGai using comparable plot methods. The results showed that: (1) The number of species increase with the sampling area increases logarith- mically, and with the logarithmic model S =alnA + b can be a good fit (R2≥0. 9715). (2) The α diversity index values of different community types(richness index, diversity index, evenness index), showed that mountain steppe" Leymus chinensis( Trin. ) Tzvel. ) + Fili folium sibiricum (L. ) Kitam. + forbs" type, Warm steppe " Leymus chinensis(Trin. ) Tzvel. ) - forbs" type. mountain steppe " Leymus chinensis (Trin.) Tzvel. ) +forbs" type, low plains steppe " Leymus chinensis (Trin.) Tzvel. ) + forbs" type has a high diversity index, low plains steppe" Leymus chinensis (Trin.) Tzvel. ) "community types has lower diversity index. (3) community diversity influence more by evenness index.
出处
《草原与草业》
2015年第4期16-24,共9页
Grassland and Prataculture
基金
内蒙古和信园蒙草抗旱股份有限公司草原生态恢复项目
关键词
群落类型
种一面积关系
Α多样性
community type
species -- area relationships
α diversity