title: [Factors causing short-term periodic changes in the numbers of bacteria in the superficial layer of sludge and in the water near the bottom].
abstract: Rhythmical temporal changes in the number of bacterial populations inhabiting the surface ooze layer and the water layer above it have been found to depend on two processes: (1) the ability of bacteria for periodic intensive growth followed by death of the cells and (2) the participation of zooplankton in consuming the bacterial cells for nourishment. The total bacterial number in samples depends on which of the two processes prevails.
mesh_terms: D001419:Bacteria / Q000254:growth & development / Q000302:isolation & purification*; D004463:Ecology; D010507:Periodicity; D014586:USSR; D014871:Water Microbiology; D015048:Zooplankton / Q000502:physiology
vernacular_title: O prichinakh, opredeliaiushchikh kratkovremennye periodicheskie izmeneniia chislennosti bakteriĭ v poverkhnostnom sloe ila i v pridonnoĭ vode.