Table 1.

Mean diurnal net photosynthetic rate (A; μmol m⁻² s⁻¹), stomatal conductance to H₂O (g_sw; mol m⁻² s⁻¹), and vapour pressure deficit (VPD; kPa), each reported with 1 SE, and number of observations each day

	A	SE	gsw	SE	VPD	SE	Observations
1 June	4.34 a,b	0.15	0.06 a	0.002	2.86 a	0.04	182
20 June	3.97 a	0.09	0.07 b	0.001	2.17 b	0.04	138
19 July	4.07 a,b	0.13	0.06 a	0.002	2.31 b	0.06	134
23 August	4.54 b	0.12	0.11 c	0.003	1.22 c	0.03	98

Different letters denote significant differences between dates (P ≤0.05; Tukey's honestly significant differences test).