The correlation heat map of aboveground and belowground diversity in Tetraena mongolica community. Different colors represent different positive and negative correlations and the magnitude of correlations. The specific values of correlations are shown in the lower part of the figure. “*” means significant difference, that is, p < 0.05; “**” means the difference is very significant, that is, p < 0.01; “***” means the difference is extremely significant, that is, p < 0.001. In the figure, the suffix “_T” represents the plant as a whole, the suffix “_B” represents the bush, the suffix “_G” represents the herb, the suffix “_Fun” represents the fungus, the suffix “_Bac” represents the bacterium, and the suffix “_Arc” represents the archaea.