TABLE 2.

Leucine assimilation per cell and per biovolume for picoplankton groups in surface waters from Fort Pierce, FL, to the Azores islands

GroupLeu assimilation per cell, 10−17 mol cell−1 h−1 (SE)Biovolume (μm−3)aLeu assimilation per biovolume, 10−17 mol μm−3 h−1 (SE)No. of samples
Other prokaryotesb2.65 (0.54)0.03771.73 (14.5)7
Prochlorococcus7.06 (3.83)0.13153.93 (29.3)4
Synechococcus2.50 (0.72)0.4495.57 (1.6)5
Picoeukaryotes6.92 (1.08)2.0003.46 (0.5)2
  • a Cell size for prokaryotes other than cyanobacteria was estimated by epifluorescence microscopy. Sizes for Prochlorococcus, Synechococcus and picoeukaryotes were taken from the work of Zubkov et al. (36).

  • b Prokaryotes other than Prochlorococcus and Synechococcus.