About this Environmental Science article
A Comparison of Microbial Community Characteristics Among Petroleum-contaminated and Uncontaminated Subsurface Soil Samples by S. C. Long; C. M. Aelion; D. C. Dobbins; F. K. Pfaender is a Environmental Science article available to read on EtoBox.
Measurements of microbial community size, including total cell counts and specific degrader enumerations, were conducted on subsurface soil samples from both petroleum-contaminated and pristine aquifers. Samples were collected from both uncontaminated and contaminated areas of the petroleumcontaminated sites. In pristine and uncontaminated samples, total cell counts (acridine orange direct counts) were related to depth. The deeper samples contained smaller total microbial populations. However, indices of microbial activity varied considerably from sample to sample and probably reflect soil and site heterogeneity. Exposure to petroleum contamination apparently altered the microbial community structure. In samples exposed to low levels of contaminants as vapors and/or dissolved phases (ppb concentrations), and not free product, the toluene-specific degrader populations were larger at greater depths, and the numbers of amino acid-specific degraders were highly correlated to the numbers of decane-specific degraders, indicating that petroleum-adapted microbial communities were present in the contaminated samples. In highly contaminated samples, total microbial population densities decre
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- Author
- S. C. Long; C. M. Aelion; D. C. Dobbins; F. K. Pfaender
- Publisher
- Springer; Springer-Verlag; Springer Verlag; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc.; Springer Nature (ISSN 0095-3628)
- Published
- 1995
- Language
- EN
- Field
- Environmental Science (Physical Sciences)