Table 1.

Thermal performance curve (TPC) parameters at constant and two variable temperature treatments (±2 and ±4°C), all at two P concentrations (10 and 0.2 μmol/L).

Phosphate status	TPC type	T-max	T-min	T-opt	T-width	μmax	R2
P-replete	Constant temp	35.9	16.3	27.7	19.6	0.32	0.97
	Variable ±2°C	35.6	16.3	27.5	19.3	0.30	0.93
	Variable ±4°C	34.5	16.6	26.8	17.9	0.26	N.A.
P-limited	Constant temp	36.6	18.2	26.3	18.4	0.12	0.75
	Variable ±2°C	36.5	18.5	26.5	18	0.12	0.70
	Variable ±4°C	36	19.6	27.0	16.4	0.10	N.A.

Values in the table were calculated by incorporating the measured growth rates at constant temperatures (16–36°C) and variable temperature treatments (22 ± 2°C, 22 ± 4°C, 30 ± 2°C) into the thermal response model of Norberg (2004) and Thomas et al. (2012). T-max, upper temperature limit; T-min, lower temperature limit; T-opt, optimal temperature; T-width, temperature range; μ_max, maximal growth rate; R², the correlation factor, in the range of 0∼1. The closer R² is to 1, the better the model-predicted growth rates match the actual measured ones. Since only one ±4°C temperature treatment was conducted, the R² for it is not available (N.A.).