Fig. 3From: High nutrient uptake efficiency and high water use efficiency facilitate the spread of Stellera chamaejasme L. in degraded grasslandsComparison of stoichiometric characteristics of leaves (Mean ± SE) between S. chamaejasme and three coexisting species (L. chinensis, S. krylovii and A. eriopoda). Values designated by different lowercase letters were significantly different among four species. Different capital letters indicate a significant difference among the four degrees of degradation, respectively (P < 0.05)Back to article page