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Long SC, Aelion CM, Dobbins DC, et al. A comparison of microbial community characteristics among petroleum-contaminated and uncontaminated subsurface soil samples. Microb Ecol. 1995;30(3):297-307doi: 10.1007/BF00171936.
Long, S. C., Aelion, C. M., Dobbins, D. C., & Pfaender, F. K. (1995). A comparison of microbial community characteristics among petroleum-contaminated and uncontaminated subsurface soil samples. Microbial ecology, 30(3), 297-307. https://doi.org/10.1007/BF00171936
Long, S C, et al. "A comparison of microbial community characteristics among petroleum-contaminated and uncontaminated subsurface soil samples." Microbial ecology vol. 30,3 (1995): 297-307. doi: https://doi.org/10.1007/BF00171936
Long SC, Aelion CM, Dobbins DC, Pfaender FK. A comparison of microbial community characteristics among petroleum-contaminated and uncontaminated subsurface soil samples. Microb Ecol. 1995 Nov;30(3):297-307. doi: 10.1007/BF00171936. PMID: 24185566.
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Microb Ecol. 1995 Nov;30(3):297-307. doi: 10.1007/BF00171936.

A comparison of microbial community characteristics among petroleum-contaminated and uncontaminated subsurface soil samples.

Microbial ecology

S C Long, C M Aelion, D C Dobbins, F K Pfaender

Affiliations

  1. Department of Civil and Environmental Engineering, University of Massachusetts, 18 Marston Hall, Box 35025, 01003, Amherst, Massachusetts, USA.

PMID: 24185566 DOI: 10.1007/BF00171936

Abstract

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 petroleum-contaminated 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 decreased with increasing depth; however, microbial activity tended to increase with depth. These results indicate that petroleum contaminants exert toxic effects on the active microbial community at high exposures and enrich specific degraders at ppb levels of dissolved contaminants.

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