Fig. 6
Diurnal variations of hourly mean a soil temperature; b volumetric soil water content and rainfall and soil-air CO2 concentration at the c Q. variabilis and d P. densiflora sites (27–29 September 2011). CQ (control Q. variabilis plot), WQ (warmed Q. variabilis plot), CP (control P. densiflora plot), WP (warmed P. densiflora plot). The closed and open circles indicate the control and warmed plots, respectively. Each value is the hourly mean ± 1 SE (n = 4). The insets in c and d present the y-axis on a finer scale before rainfall and the asterisks denote significant differences in SCO2 between the control and warmed plots (P < 0.05)