Figure 2

The relationships between annual anomalies of carbon flux anomalies from from the mean of all sites for each ecosystem type in Australia. (a) The correlation between gross primary production (GPP) and ecosystem respiration (Re). (b) The correlation between net ecosystem production (NEP) and GPP. (c) The correlation between NEP and Re. Anomalies were calculated as the annual fluxes minus the mean value of annual fluxes at all sites for each ecosystem type. Red and green solid circles denoted the flux anomalies for non-forest and forest ecosystems, respectively. The solid lines (red for non-forest and green for forest) are the best-fitted linear regression equations with the shaded area for 95% confidence intervals.