Table 2.

Difference in the effect of time (simple and quadratic effect, “time” and “time²”) on nectar traits and the number of flowers between the experimental and control groups (“group”) in the four species for with reliable control data.

Trait	Interaction terms of the models	Asphodelus ramosus		Echium plantagineum		Ballota acetabulosa		Teucrium divaricatum		Species combined
		t	p	t	p	t	p	t	p	t	p
Nectar volume per flower	Time × group	3.119	**	−4.900	***	−0.757		0.481		−0.362
	Time2 × group	0.968		4.881	***	3.543	***	−2.540	*	3.715	***
Sugar concentration per flower	Time × group	−1.667		1.611		0.310		−0.606		2.334	*
	Time2 × group	−0.501		−0.458		−1.841		1.868
Sugar content per flower	Time × group	3.529	**	−4.988	***	0.554		1.058		2.012	*
	Time2 × group	1.417		5.786	***	3.880	**	−0.997		4.225	***
Sugar content per plant	Time × group	2.376	*	−4.030	***	−1.209		−1.041		0.349
	Time2 × group	1.008		4.695	***	3.007	**	−0.066		2.644	**
Number of flowers per plant	Time × group	0.368		−2.075	*	−3.824	***	−0.418		−0.059
	Time2 × group	−0.823		2.182	*	1.027		2.679	**	1.312

Only interaction terms are presented here from the model full results and only for the best models (with or without the quadratic effect), according to model AIC values. The analysis with the four species combined is given at the right column in bold.

^*0.05–0.01,

^**0.01–0.001,

^***<0.001.