TABLE 3.

Parameter of respective PE-curves (Figures 1A–H) of eight diatom cultures (n = 3) kept at 20°C in a f/2 Baltic Sea water medium, 15S_A.

Isolates	NPPmax (μmol O2 mg–1 Chl a h–1)	Respiration (μmol O2 mg–1 Chl a h–1)	α (μmol O2 mg–1 Chl a h–1) (μmol photons m–2 s–1)–1	β (μmol O2 mg–1 Chl a h–1) (μmol photons m–2 s–1)–1	Ik (μmol photons m–2 s–1)	Ic (μmol photons m–2 s–1)	NPPmax: Respiration
Actinocyclus octonarius	$144.07\pm 19.47\mathrm{a}$	$-29.21\pm 1.30$	1.15±0.14	$-0.03\pm 0.01$	151.34±9.51	28.5±2.20	4.93±0.54
Melosira moniliformis	$23.12\pm 1.62\mathrm{b}$	$-26.96\pm 3.55$	1.26±0.18	$-0.01\pm 0.00$	39.78±2.31	30.57±3.12	0.86±0.08
Halamphora sp. 1	$29.31\pm 2.68\mathrm{bcd}$	$-19.01\pm 2.59$	1.01±0.24	$-0.01\pm 0.00$	48.05±5.52	24±2.29	1.54±0.07
Halamphora sp. 2	$55.46\pm 10.62\mathrm{cde}$	$-6.07\pm 6.18$	0.88±0.15	$-0.01\pm 0.01$	69.75±7.96	7.32±3.35	9.14±0.22
Navicula perminuta	$38.73\pm 2.86\mathrm{bcd}$	$-20.84\pm 4.81$	1.88±0.58	0.01±0.01	31.61±2.22	13.49±1.26	1.86±0.08
Navicula phyllepta	$70.81\pm 7.89\mathrm{e}$	$-22.15\pm 14.67$	1.64±0.76	0.01±0.00	56.66±12.62	15.36±3.61	3.20±0.56
Nitzschia dubiiformis	$38.60\pm 12.08\mathrm{b}$	$-50.18\pm 3.33$	1.6±0.63	0.01±0.01	55.55±12.76	45.50±6.24	0.77±0.19
Nitzschia pusilla	$60.12\pm 12.03\mathrm{d}$	$-17.11\pm 2.85$	1.84±0.15	$-0.02\pm 0.00$	41.93±9.32	10.50±0.45	3.51±0.19

NPP_max represents the maximal oxygen production rate, alpha the initial slope of production in the light limited range, beta the terminal slope of production in extensive light range (photoinhibition), I_k the light saturation point, I_c the light compensation point. Data represent a mean value ± SD (n = 3). Different lowercase letters represent significance levels among all means as calculated by a one-way ANOVA (Tukey’s test, p < 0.05). NPP_max: F = 29.576, df = 4, p < 0.001.