The short-term effects of elevated CO2 and ammonium concentrations on physiological responses in Gracilariopsis lemaneiformis (Rhodophyta)

Table 1 Parameters of seawater carbonate system under tested pH conditions

Culture conditions	TA	pCO₂	CO₂	CO₃ ²⁻	HCO₃ ⁻	DIC
L_pHL_A	2012.75 ± 1.77	1420.09 ± 1.27	46.11 ± 0.04	52.60 ± 0.05	1878.61 ± 1.67	1977.32 ± 1.76
L_pHM_A	2017.33 ± 1.87	1423.37 ± 1.34	46.22 ± 0.04	52.72 ± 0.05	1882.94 ± 1.77	1981.88 ± 1.87
L_pHH_A	2015.42 ± 6.29	1405.93 ± 3.86	45.60 ± 0.13	53.76 ± 0.13	1879.16 ± 5.03	1978.52 ± 5.29
H_pHL_A	2022.16 ± 2.60	394.69 ± 0.53	12.82 ± 0.02	146.20 ± 0.20	1651.11 ± 2.21	1810.13 ± 2.42
H_pHM_A	2021.86 ± 2.40	394.63 ± 0.49	12.81 ± 0.02	146.18 ± 0.18	1650.86 ± 2.04	1809.85 ± 2.23
H_pHH_A	2019.51 ± 5.00	389.79 ± 1.35	12.69 ± 0.04	148.36 ± 0.28	1645.46 ± 4.43	1806.51 ± 4.76

Values are means ± SD. Both pH and TA (μmol kg⁻¹) were measured directly for each scenario, whereas pCO₂ (μatm), CO₂ (μmol kg⁻¹), CO₃ ²⁻ (μmol kg⁻¹), HCO₃ ⁻ (μmol kg⁻¹), and DIC (μmol kg⁻¹) were calculated according to the CO2SYS program of Lewis and Wallace (1998)

ISSN: 2234-1757