Record Display for the EPA National Library Catalog


Main Title Explanation for the Decline of Bacteria Introduced into Lake Water.
Author Gurijala, K. R. ; Alexander, M. ;
CORP Author Cornell Univ., Ithaca, NY. Lab. of Soil Microbiology.;Environmental Research Lab., Gulf Breeze, FL.
Publisher c1990
Year Published 1990
Report Number EPA/600/J-90/517;
Stock Number PB91-206896
Additional Subjects Aquatic bacteria ; Aquatic biology ; Lakes ; Biological stress ; Environmental effects ; Water pollution effects ; Bioindicators ; Temperature dependence ; Population growth ; Protozoa ; Microorganisms ; Aquatic ecosystems ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB91-206896 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 16p
The sizes of the populations of individual bacterial species diminished following their addition to water from lakes with different trophic levels at temperatures of 5, 10, 15, and 30 C. Some species persisted after their initial reduction in cell numbers, but others were undetectable after 3 to 15 days. The decline of these introduced bacteria was not a result of their inoculation at higher densities than are found in nature. Protozoan predation was a significant factor in the fall in bacterial populations sizes because protozoa increased in numbers as the bacterial density fell, the suppression of protozoa led to the elimination or delay of the decline of the bacteria, and the addition of protozoa to lake water in which indigenous protozoa were suppressed produced the same pattern of bacterial elimination as in untreated lake water. (Copyright (c) Springer-Verlag New York Inc. 1990.)