TABLE 3.

Contributions to leucine assimilation (20 nM addition) by cyanobacteria and other microbial groupsa

GroupLeucine assimilation, pmol liter−1 h−1 (SE)% by groupc (SE)No. of samples
LightDarkLight − darkb (SE)
Total community25.92 (3.67)22.50 (3.76)3.42 (0.85)100 (25)7
Prochlorococcus4.63 (1.11)1.88 (0.27)2.75 (1.08)80 (30)4
Synechococcus1.46 (0.96)1.05 (0.52)0.41 (0.62)12 (7)7
Otherd21.82 (0.89)20.52 (0.48)1.30 (0.75)38 (8)7
  • a Values are averages for all stations.

  • b Difference in leucine incorporation between light and dark incubations.

  • c Percentage of the difference between light and dark incubations accounted for by the indicated group.

  • d Difference between total community and cyanobacteria (Prochlorococcus and Synechococcus). Values were calculated per sample, and then percentages were averaged for all stations.