Table 2. Effects of temperature, growth rate and strain identity on the elemental composition of six Prochlorococcus strains.

		QP		QN		QC		C/N		C/P		N/P
Linear model		Estimate	p-value	Estimate	p-value	Estimate	p-value	Estimate	p-value	Estimate	p-value	Estimate	p-value
	Intercept	1.2	4.9x10-3	2.2	0.08	7.8	0.27	5.8	7.6x10-17	53	0.6	14	0.3
	Temperature	0.0	1.0	0.2	2.9x10-4	1.2	2.3x10-4	0.01	0.6	6.8	0.1	0.9	0.1
	Growth rate	-2.0	1.2x10-2	-1.6	0.6	-3.3	0.8	0.3	0.8	-65	0.7	-14	0.6
ANOVA		SS	p-value	SS	p-value	SS	p-value	SS	p-value	SS	p-value	SS	p-value
	Strain	1.1	0.1	22	1x10-4	1x103	6x10-6	4.3	7x10-3	2x105	2x10-5	4x103	1x10-4
	Temperature1	1.4	2.3x10-2	41	5x10-7	1x103	8x10-7	0.3	0.6	3x104	2.5x10-2	6.2x102	4.8x10-2
	Growth rate	0.6	3.0x10-2	6.5	1x10-3	2.8x102	3x10-4	0.8	5.3x10-2	67	0.9	10	0.7
	Strain:T	0.8	0.5	22	1x10-3	5.7x102	3x10-3	1.8	0.4	6x104	2.6x10-2	1x103	3.9x10-2
	Strain:Gr	0.1	0.9	0.9	0.8	28	0.8	0.3	0.9	3x103	0.9	1.x102	0.9
	T:Gr	0.6	0.2	0.8	0.6	6.5	0.9	0.7	0.3	2x104	0.13	5.8x102	5.7x10-2
	Strain:T:Gr	0.2	0.9	8.6	7.2x10-2	2.4x102	9.6x10-2	0.8	0.9	5x103	0.9	89	0.9
Phylogeny corr.		R	p-value	R	p-value	R	p-value	R	p-value	R	p-value	R	p-value
	Mantel test	0	0.48	0.19	0.23	0.19	0.23	0.06	0.24	-0.07	0.60	0.02	0.45

¹ Temperature was treated as factor in ANOVA