Significance of algal excretory products for growth of epilimnetic bacteria.
Light-stimulated uptake of CO(2) and differential filtration through Nucleopore filters were used to estimate the significance of phytoplankton excretion as a source of bacterial carbon in water samples collected at different seasons of the year in Lake Mendota, Wis. On an annual basis, about 14% of the estimated bacterial production was accounted for by algal excretion, although at certain times of year the fraction of bacterial carbon derived from algal excretion was considerably higher. About 20% of the annual primary production was estimated to pass through the bacterial component.
Brock
T D
TD
Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin 53706.
Clyne
J
J