Factors influencing hydrocarbon degradation in three freshwater lakes |
| |
Authors: | J J Cooney S A Silver E A Beck |
| |
Institution: | (1) Present address: Environmental Science Program, University of Massachusetts-Boston, 02125 Boston, Massachusetts, USA;(2) Department of Biology, University of Dayton, 45469 Dayton, Ohio, USA;(3) Present address: International Minerals and Chemical Corporation, 47808 Terre Haute, IN, USA |
| |
Abstract: | The mixed microbial flora of 3 lakes in Ohio with differing histories of hydrocarbon pollution was examined in relation to the ability to use hydrocarbons. Weathered kerosene was spiked with naphthalene, pristane, 1,13-tetradecadiene, andn-hexadecane and added to water-sediment mixtures from the 3 lakes, and utilization of the 4 marker hydrocarbons was measured. Each of the marker hydrocarbons was metabolized; naphthalene was the most readily used and pristane was the most resistant. Values for dissolved oxygen suggest that oxygen did not limit hydrocarbon degradation in the water column at any site examined. Nutrient addition studies indicated that nitrogen and phosphorus limited hydrocarbon degradation at all sites examined. Maximum numbers of heterotrophic bacteria were detected when the water temperature was 10°C or higher. The data indicate that temperature limits hydrocarbon degradation in the winter, except at a site which had been impacted by an oil spill and which received chronic inputs of hydrocarbons and nutrients. In samples from that site, all 4 marker hydrocarbons were degraded at 0°C. Results of temperature and nutrient-addition experiments suggest that different seasonal populations of hydrocarbon users are selected at that site, but not at other lake sites. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|