Measurement of planktonic bacterial production in an oligotrophic lake1

Abstract

Planktonic heterotrophic bacterial production in Mirror 1,ake (New IIampshirc) was cstimated by several different methods. Production ranged between 3 and 8 g C * m 2* yr-' based on organic C fluxes and the sum of bacterial losses. The close agreement with the estimate of 6.5 * 1.8 (X ? SE) obtained by the ssSOa method (in which bacterial S uptake was multiplied by a C:S ratio of 50) supports the validity of using this method in aerobic freshwaters.

Sestonic bacteria as a food source for filtering invertebrates in two southeastern blackwater rivers1

“…Values in Black Creek were 15.6-525.3 mg C m-2 with a mean of 143.0. The differences in areal biomass between the two rivers were caused by differences in volumetric concentrations rather than differences in depth, which varied from < 1 to 3 m. In comparison, the mean annual standing stock of bacteria in Mirror Lake, New Hampshire, was 80 mg C mm2 (Jordan and Likens 1980: water depth 5.7 m). Bacterial biomass ranged annually from 50 to 400 mg C m-2 in Lake Mendota (Pedros-Alib and Brock 1982: water depth 24 m).…”

“…Reported cell volumes for rivers range from 0.03 to 0.28 pm3 (Geesey et al 1978;Geesey and Costerton 1979;Bell et al 1983). Jordan and Likens (1980) calculated a mean volume of bacteria in Mirror Lake of 0.088 bm3. Volumes in Lake Mendota, Wisconsin, averaged 0.1 G pm3 (PedrosAlio and Brock 1982).…”

Dynamics of a Phaeocystis-dominated spring bloom in Belgian coastal waters. II. Bacterioplankton dynamics

“…A conversion factor of 1.2 X 10-7 pg C pm-3 was used for calculating biomass from biovolume. This value is the median of those cited in the literature which vary in the range 0.87 to 1.65 X 10-7 (Ferguson & Rublee 1976, Williams & Carlucci 1976, Watson et al 1977, Hagstrom et al 1979, Jordan & Likens 1980, Pedros-Alio & Brock 1982.…”

Cycling of organic carbon in the photic zone of a eutrophic lake with special reference to the heterotrophic bacteria

“…13acterial production estimated for various aquatic systems has been in the range of 18-44% of phytoplankton primary production on an annual basis (Jordan and Likens 1980;Larsson and Hagstrom 1982;Peldros-Aho and Brock 1982;Riemann 1983;Love11 and Konopka 1985), and the review by Cole et al ( 1988) suggests an average of 30%. The fate of this production is poorly understood, but several workers have suggested that grazing by protozoans may be important (e.g.…”