Fig. 2From: Responses of soil microbial communities to freeze–thaw cycles in a Chinese temperate forestAlpha diversity indexes (richness and Shannon) of soil (a, c) bacterial and (b, d) fungal community at different freeze–thaw stages. The effects of freeze–thaw treatment (FT), soil horizon (H), and their interaction (FT × H) are shown in the figure. Lowercase letters indicate significant differences among different stages in each soil horizon (P < 0.05). Box indicates mean ± standard error (n = 3)Back to article page