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THE EFFECTS OF SELECTED HERBICIDES ON BACTERIAL POPULATIONS IN AN AQUATIC ENVIRONMENT 1
Author(s) -
Ferebee R. N.,
Guthrie R. K.
Publication year - 1973
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1973.tb05851.x
Subject(s) - paraquat , bacteria , environmental chemistry , biology , aquatic environment , mesophile , heterotroph , aquatic ecosystem , ecology , botany , chemistry , biochemistry , genetics
Heterotrophic, mesophilic bacteria derived from, and maintained in, a freshwater environment were subjected to three classes of herbicides. Diuron, 2,4,5‐Trichlorophenoxyacetic acid, and paraquat, used as water soluble solutions, were added (0.7 and 1.4 mgA) to a laboratory culture of bacteria. Total numbers of the bacteria, representing several genera, were monitored for alteration of numbers and types. Temperature, pH, and dissolved oxygen were monitored and the culture medium was tested for residual herbicide. Alterations observed in populations were considered to result from herbicide additions. Each herbicide tested was found to affect bacterial populations differently. Reasons for observed differences are discussed. In this aquatic environment the herbicides remained qualitatively measurable for periods up to three weeks.