. 2015 Aug 11;10(2):450–459. doi: 10.1038/ismej.2015.126

Table 2. C-specific C-fixation rate with respect to ¹³C-labeled bicarbonate uptake and N-specific NH₄ ⁺-growth rate and N-doubling time of N-biomass calculated from the isotope ratios in the various cell types (Figure 4).

Cell type	C-specific C-growth rate (h⁻¹)	N-specific NH₄⁺-growth rate (h⁻¹)	N-doubling time (days)
Aphanizomenon sp. (n=39)	0.025±0.008	0.0011±0.0008	38
Heterotrophic bacteria attached to Aphan (n=110)	0.009±0.011	0.025±0.012	1.7
Free-living heterotrophic bacteria (n=264)	0.003±0.007	0.026±0.016	1.6
Autotrophic bacteria attached to Aphan (n=68)	0.024±0.007	0.028±0.009	1.2
Free-living autotrophic bacteria (n=84)	0.022±0.009	0.035±0.012	1.2
Eukaryotes (n=6)	0.041±0.025	0.032±0.011	1.3

Autotrophic bacteria were identified by autofluorescence.

Table 2. C-specific C-fixation rate with respect to 13C-labeled bicarbonate uptake and N-specific NH4 +-growth rate and N-doubling time of N-biomass calculated from the isotope ratios in the various cell types (Figure 4).