Fig. 3: Environmental context-dependent responses of tree biomass C accumulation to functional diversity (FDis). | Nature Communications

Fig. 3: Environmental context-dependent responses of tree biomass C accumulation to functional diversity (FDis).

From: Resource availability enhances positive tree functional diversity effects on carbon and nitrogen accrual in natural forests

Fig. 3

a, b Solar-dependent responses for residual tree biomass C accumulation (as indicated by the Δ symbol) after removing MAT effect; c, d organic horizon soil C/N-dependent responses; e, f soil pH-dependent responses. The black line and grey shaded areas in panels a, c, and e represent the fitted regression and its bootstrapped 95% confidence intervals. Colored lines in panels b, d, and f represent the Solar-, soil C/N-, and pH-specific responses, with their bootstrapped 95% confidence intervals shaded in the corresponding color. Solar, soil C/N, and soil pH were analyzed as continuous variables but illustrated here based on the meaningful three levels of breakpoints (mean, mean plus, and minus standard deviation (SD)). The significance (P) is reported for each term tested, with P values calculated using a one-sided F test. Solar: decadal average of annual solar radiation (for each plot), df: degrees of freedom.

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