Protozoan Response to the Addition of Bacterial Predators and Other Bacterial to Soil.

摘要

Representatives of several categories of bacteria were added to soil to determine which of them might elicit responses from the soil protozoa. The various categories were nonobligate bacterial predators of bacteria, prey bacteria for these predators, indigenous bacteria that are normally present in high numbers in soil, and non-native bacteria that often find their way in large numbers into soil. The soil was incubated and the responses of the indigenous protozoa were determined by most-probable-number estimations of total numbers of protozoa. Although each soil was incubated with only one species of added bacteria, the protozoan response for the soil was evaluated by using most-probable-number estimations of several species of bacteria. Keywords: Predatory bacteria. Cupiavidus, Necator, Micrococcus luteus, Arthrobacter, Globiformis, Bacillus, Thruingiensis, Bacillus, Mycoides, Escherichia, Coli, Reprints. (kt)