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Ecological Processes
Fig. 2 | Ecological Processes

Fig. 2

From: Warming and altered precipitation rarely alter N addition effects on soil greenhouse gas fluxes: a meta-analysis

Fig. 2

Effects of N addition (N), warming (W), increased precipitation (IP), and decreased precipitation (DP) alone or N addition combined with warming (W + N), increased precipitation (IP + N), and decreased precipitation (DP + N), on soil CO2 emissions (a), CH4 uptake (b), and N2O emissions (c). Data are means with 95% confidence intervals (\(\mathrm{CI}\)). The number of observations is shown along the right axis. Blue, orange, and gray solid dots indicate significantly positive, significantly negative, and non-significant effects, respectively. The vertical dashed lines are zero lines

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