Record Display for the EPA National Library Catalog

RECORD NUMBER: 29 OF 62

OLS Field Name OLS Field Data
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 ;
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB91-206896 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 11/26/1991
Collation 16p
Abstract
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.)