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Particle size, water-stable aggregates, and bacterial populations in lake sediments
Tsernoglou, D.; Anthony, E.H. (1971). Particle size, water-stable aggregates, and bacterial populations in lake sediments. Can. J. Microbiol. 17(2): 217-227
In: Canadian Journal of Microbiology = Journal Canadien de Microbiologie. National Research Council: Ottawa. ISSN 0008-4166, more
Peer reviewed article  

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Keyword
    Fresh water

Authors  Top 
  • Tsernoglou, D.
  • Anthony, E.H.

Abstract
    Sediments from 10 lakes for which bacterial counts were available were submitted to particle size analysis (Coulter Counter), both before and after removal of organic material. While these sediments were not so highly aggregated at soils, they contained waterstable aggregates and differed from one another in this characteristic. The counter failed to detect some apparently unstable aggregations visible in the sediment of one lake. The median sizes of the untreated sediment were observed to be inversely proportional to the median sizes of the sediment from which the organic component had been removed. There was good correlation between logarithms of the heterotrophic bacterial population (culture counts) and the median sizes of the particles in untreated samples of the sediment. Estimations of bacterial density assuming a specific gravity of 1.6 for these sediments indicated that, for the 4 lakes for which direct counts of bacteria were available, there were from 3000-15000 bacteria/mm2 of sediment particle surface, or approximately 1 bacterium for every 70 to 300 mu2.

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