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Effect of Cattle Feedlot Volatiles, Aliphatic Amines, on Chlorella ellipsoidea Growth¹

ABSTRACT

An appreciable portion of the tons of basic N-compounds, volatilized from cattle feedyards each year, are aliphatic amines. The effect of these nonammoniacal organic bases upon organisms in surface waters located near cattle feedlots is unknown. This study was designed to determine the effect of the aliphatic amines identified as feedlot volatiles, upon a common fresh water alga, Chlorella ellipsoidea, in laboratory pure culture studies. Individual aliphatic amines caused a 50% reduction in population growth of C. ellipsoidea at concentrations ranging from 1.2 to 143 ppm amine-N. Primary amines were more inhibitory than iso-, sec-, and dialkylamines. The algae did not utilize amine-N for growth with or withour an added N source.

Key Words: algae • toxicity • volatile • nitrogen

¹ Contribution of Agricultural Research Service, USDA, in cooperation with Colorado State Univ. Exp. Station, Ft. Collins. Scientific Journal Ser. No. 1826. This work was supported in part by the Environmental Protection Agency.

² Chemist, USDA, P. O. Box E, Ft. Collins, Colo. 80521.

Received for publication March 8, 1973.