TABLE 2.

¹³C and ¹⁵N assimilation rates in Cyanothece during N₂ and NO₃ growth.

	Morning	Afternoon	Night		Night + day
	(07:30–09:30)	(14:45–17:15)	(early 21:45–00:45)	(late: 02:00–07:00)	(21:45–17:15)
kC (d–1)
N2 culture	1.70 ± 0.35	0.39 ± 0.08	0.022 ± 0.006	0.007 ± 0.005	0.090 ± 0.015
NO3 culture	0.84 ± 0.15	0.42 ± 0.07	0.0045 ± 0.0019		–
SC-N2 culture	0.74 ± 0.63	0.14 ± 0.03	0.0012 ± 0.0008		–
kN (d–1)
N2 culture	0.016 ± 0.164	0.0024 ± 0.0032	1.34 ± 0.79	0.012 ± 0.047	0.078 ± 0.044
NO3 culture	3.19 ± 0.91	1.31 ± 0.18	0.32 ± 0.18		–
SC-N2 culture	0.24 ± 0.28	0.0005 ± 0.0034	0.077 ± 0.063		–

Shown are mean ± SD values of k_C and k_N for cells measured by nanoSIMS. Values for individual cells are shown in Figure 2.