Table 1.

Multivariate analysis of variance (MANOVA) table displaying p‐values and F‐values for all measured responses (linear extension, wet weight relative growth rate, net photosynthesis, chlorophyll a content, phycobiliprotein content, change in δ¹³C, change in C:N ratio, change in carbon tissue content, change in nitrogen tissue content, total lipid content, total fatty acid content, change in [H⁺], change in [HCO₃ ⁻], change in [CO₂], change in [CO₃ ²⁻], and change in total DIC)

Response	Interaction		Factor
			Species		CO2 treatment
	F‐value	p‐value	F‐value	p‐value	F‐value	p‐value
Linear extension	6.474	0.021	–	–	–	–
Wet weight RGR	3.125	0.095	15.743	0.001	2.133	0.162
Chlorophyll a content (mg per g wet weight)	0.509	0.485	20.563	<0.001	0.169	0.686
Phycobiliprotein content (mg per g wet weight)	1.375	0.257	4.271	0.054	0.020	0.889
Net photosynthesis (µmol O2 hr− 1 g− 1)	1.813	0.196	1.385	0.256	0.075	0.788
Change in δ13C	1.229	0.283	8.528	0.010	7.975	0.012
Change in C:N ratio	0.274	0.608	1.350	0.261	0.083	0.777
Change in carbon tissue content	0.012	0.914	1.051	0.320	0.110	0.744
Change in nitrogen tissue content	0.031	0.861	5.813	0.028	0.140	0.713
Total lipid content	0.134	0.719	2.458	0.135	0.121	0.733
Total fatty acid content	0.220	0.645	35.466	<0.001	3.363	0.084
Change in [H+]	0.659	0.427	0.549	0.468	133.993	<0.001
Change in [HCO3 −] (µmol/kg)	0.418	0.526	0.580	0.456	0.013	0.910
Change in [CO2] (µmol/kg)	0.501	0.488	0.395	0.537	134.789	<0.001
Change in [CO3] (µmol/kg)	0.025	0.877	1.671	0.212	0.171	0.684
Change in total DIC (µmol/kg)	0.754	0.396	0.119	0.734	2.572	0.125

p‐values and F‐values of separate factors are not shown when the interaction between factors is significant (α = 0.05).

p‐values in bold have a significance of p < 0.05.