西藏高寒草原群落植物根系属性在降水梯度下的变异格局

周玮,李洪波,曾辉

Variations of root traits in three Xizang grassland communities along a precipitation gradient

ZHOU Wei,LI Hong-Bo,ZENG Hui

表3 西藏高寒草原22种植物去除种系发生信号(右上)与未去除种系发生信号(左下)时3个根属性间的Pearson相关性

Table 3 Pearson correlations with (top right) and without (bottom left) phylogenetically independent contrasts for root traits across 22 species in Xizang alpine grassland

根属性 Root trait	一级根直径 1st-order root diameter	分支强度 Root branching intensity	一级根长度 1st-order root length
一级根直径 1st-order root diameter		-0.008^ns	0.672^**
根系分支强度 Root branching intensity	-0.432^*		-0.139^ns
一级根长度 1st-order root length	0.728^**	-0.573^**