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Appl Environ Microbiol. 1970 January; 19(1): 100-102
Copyright © 1970 American Society for Microbiology. All Rights Reserved.

Growth Rate of Sphaerotilus in a Thermally Polluted Environment

Department of Microbiology, Indiana University, Bloomington, Indiana 47401

ABSTRACT

In situ growth of Sphaerotilus on microscope slides immersed in a thermally polluted stream was studied. Ultraviolet radiation was used to differentiate between passive attachment of organisms from the water and growth of the organisms on the slides. Colonization of the slides in this environment took place solely by means of swarmer cells. A generation time of 2.3 hr was obtained at a water temperature of 18-22 C.

¹ Present address: Stroud Water Research Laboratory, The Academy of Natural Sciences of Philadelphia, R.D. 1 Box 286, Avondale, Pa. 19311