Table 1.

Effect of temperature (simple and quadratic effect of temperature, ‘T’ and ‘T²’, respectively) on nectar and flower traits in the climate chamber. ‘I’ represents model intercept, ‘R²m’ and ‘R²c’ denote marginal and conditional coefficients of determination, indicating the variation explained by fixed factors (R²m) and the whole model (R²c; Barton 2015). Statistically significant (P < 0.05) results are presented in bold.

Species	Modelled trait		Estimate	SE	t	P	R2m	R2c
B. acetabulosa	Nectar volume per flower	I	−0.748	0.162	−4.614	<0.001	0.31	0.47
		T	0.079	0.012	6.441	<0.001
		T2	−0.002	0.0002	−6.942	<0.001
	Sugar concentration per flower	I	0.945	0.608	1.554	0.124	0.03	0.53
		T	−0.118	0.046	−2.586	0.011
		T2	0.002	0.001	2.656	0.009
	Sugar content per flower	I	−2.578	0.624	−4.134	<0.001	0.37	0.50
		T	0.320	0.047	6.863	<0.001
		T2	−0.006	0.001	−7.477	<0.001
	Sugar content per plant	I	−6.153	1.181	−5.208	<0.001	0.51	0.58
		T	0.740	0.088	8.389	<0.001
		T2	−0.015	0.002	−9.239	<0.001
	Number of flowers per plant	I	−1.436	0.321	−7.598	<0.001	0.82	0.84
		T	0.346	0.024	14.500	<0.001
		T2	−0.007	0.0004	−16.561	<0.001
	Biomass per flower	I	−1.815	0.046	−39.637	<0.001	0.75	0.92
		T	0.005	0.003	1.622	0.108
		T2	−0.0003	0.0001	−5.194	<0.001
T. divaricatum	Nectar volume per flower	I	−0.074	0.053	−1.383	0.170	0.08	0.41
		T	0.011	0.004	2.748	0.007
		T2	−0.0002	0.0001	−2.428	0.017
	Sugar concentration per flower	I	0.676	0.104	6.510	<0.001	0.02	0.53
		T	−0.005	0.004	−1.392	0.167
	Sugar content per flower	I	0.088	0.257	0.341	0.734	0.08	0.60
		T	0.085	0.020	4.313	<0.001
		T2	−0.002	0.0004	−4.055	<0.001
	Sugar content per plant	I	−0.217	0.678	−0.320	0.749	0.42	0.82
		T	0.327	0.052	6.317	<0.001
		T2	−0.007	0.001	−7.524	<0.001
	Number of flowers per plant	I	−0.202	0.611	−0.330	0.742	0.54	0.87
		T	0.254	0.045	5.680	<0.001
		T2	−0.006	0.001	−7.851	<0.001
	Biomass per flower	I	−1.965	0.060	−32.871	<0.001	0.45	0.93
		T	0.004	0.005	0.934	0.353
		T2	−0.0003	0.0001	−3.447	<0.001