Fig. 3: The relationship between species diversity, ratio of BGB:AGB, and EOS using Northern China’s grasslands data and global gridded data. | Communications Earth & Environment

Fig. 3: The relationship between species diversity, ratio of BGB:AGB, and EOS using Northern China’s grasslands data and global gridded data.

From: Species diversity advances autumn senescence via enhanced belowground carbon allocation in semi-arid grasslands

Fig. 3

Partial relationships derived from multiple linear mixed-effects models, with ratio of BGB:AGB as the dependent variable and species diversity as the independent variable (a), and EOS as the dependent variable and ratio of BGB:AGB as the independent variable (c), accounting for the random effects of grassland type. The blue lines depict the predicted mean values from the models, while the surrounding shaded areas represent the 95% confidence intervals (CI). The hexagonal bins display the distribution of observed data points, adjusted for other covariates, with the color intensity indicating the density of data points. Global analysis of the relationship between ratio of BGB:AGB and species diversity (b), and EOS and ratio of BGB:AGB (d) using gridded data, with local regression coefficients indicated by the color of the points. The inset bar charts summarize the proportion of local regression coefficients that were positive or negative. The EOS represents the end of the growing season, BGB represents belowground biomass, and AGB represents aboveground biomass.

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