Figure 4. Warming effects on (A) Simpson evenness index and (B)
species dominance. Asterisks indicate significant differences atP < 0.05 (*), P < 0.01 (**) andP < 0.001 (***). Values are mean ± standard errors. Sk:Stipa krylovii . Pc: Poa crymophila . Kc: Koeleria
cristata . Mr: Medicago ruthenica . Kh: Kobresia humilis .
As: Artemisia scoparia . Ha: Heteropappus altaicus . Gs:Gentiana squarrosa .