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Title: Microbial community composition and diversity in Caspian Sea sediments

Abstract

The Caspian Sea is heavily polluted due to industrial and agricultural effluents as well as extraction of oil and gas reserves. Microbial communities can influence the fate of contaminants and nutrients. However, insight into the microbial ecology of the Caspian Sea significantly lags behind other marine systems. Here we describe microbial biomass, diversity and composition in sediments collected from three sampling stations in the Caspian Sea. Illumina sequencing of 16S rRNA genes revealed the presence of a number of known bacterial and archaeal heterotrophs suggesting that organic carbon is a primary factor shaping microbial communities. Surface sediments collected from bottom waters with low oxygen levels were dominated by Gammaproteobacteria while surface sediments collected from bottom waters under hypoxic conditions were dominated by Deltaproteobacteria, specifically sulfate-reducing bacteria. Thaumarchaeota was dominant across all surface sediments indicating that nitrogen cycling in this system is strongly influenced by ammonia-oxidizing archaea. This study provides a baseline assessment that may serve as a point of reference as this system changes or as the efficacy of new remediation efforts are implemented.

Authors:
 [1];  [2];  [3];  [1];  [1];  [1];  [4];  [5];  [6]
  1. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Civil and Environmental Engineering; Univ. of Tennessee, Knoxville, TN (United States). Center for Environmental Biotechnology
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). BioSciences Division
  3. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Chemistry
  4. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Earth and Planetary Sciences
  5. Univ. of Tennessee, Knoxville, TN (United States). Center for Environmental Biotechnology
  6. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Civil and Environmental Engineering; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). BioSciences Division; Univ. of Tennessee, Knoxville, TN (United States). Center for Environmental Biotechnology; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Earth and Planetary Sciences; Univ. of Tennessee, Knoxville, TN (United States). Dept. of Microbiology
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC); University of Tennessee; BP America
OSTI Identifier:
1625318
Grant/Contract Number:  
AC05-00OR22725; A13-0119-001]
Resource Type:
Accepted Manuscript
Journal Name:
FEMS Microbiology Ecology (Online)
Additional Journal Information:
Journal Name: FEMS Microbiology Ecology (Online); Journal Volume: 91; Journal Issue: 1; Journal ID: ISSN 1574-6941
Publisher:
Federation of European Microbiological Societies
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; 54 ENVIRONMENTAL SCIENCES; Microbiology; Caspian Sea; marine sediments; bacteria; archaea; Illumina; PLFA

Citation Formats

Mahmoudi, Nagissa, Robeson, Michael S., Castro, Hector F., Fortney, Julian L., Techtmann, Stephen M., Joyner, Dominique C., Paradis, Charles J., Pfiffner, Susan M., and Hazen, Terry C. Microbial community composition and diversity in Caspian Sea sediments. United States: N. p., 2014. Web. doi:10.1093/femsec/fiu013.
Mahmoudi, Nagissa, Robeson, Michael S., Castro, Hector F., Fortney, Julian L., Techtmann, Stephen M., Joyner, Dominique C., Paradis, Charles J., Pfiffner, Susan M., & Hazen, Terry C. Microbial community composition and diversity in Caspian Sea sediments. United States. https://doi.org/10.1093/femsec/fiu013
Mahmoudi, Nagissa, Robeson, Michael S., Castro, Hector F., Fortney, Julian L., Techtmann, Stephen M., Joyner, Dominique C., Paradis, Charles J., Pfiffner, Susan M., and Hazen, Terry C. Fri . "Microbial community composition and diversity in Caspian Sea sediments". United States. https://doi.org/10.1093/femsec/fiu013. https://www.osti.gov/servlets/purl/1625318.
@article{osti_1625318,
title = {Microbial community composition and diversity in Caspian Sea sediments},
author = {Mahmoudi, Nagissa and Robeson, Michael S. and Castro, Hector F. and Fortney, Julian L. and Techtmann, Stephen M. and Joyner, Dominique C. and Paradis, Charles J. and Pfiffner, Susan M. and Hazen, Terry C.},
abstractNote = {The Caspian Sea is heavily polluted due to industrial and agricultural effluents as well as extraction of oil and gas reserves. Microbial communities can influence the fate of contaminants and nutrients. However, insight into the microbial ecology of the Caspian Sea significantly lags behind other marine systems. Here we describe microbial biomass, diversity and composition in sediments collected from three sampling stations in the Caspian Sea. Illumina sequencing of 16S rRNA genes revealed the presence of a number of known bacterial and archaeal heterotrophs suggesting that organic carbon is a primary factor shaping microbial communities. Surface sediments collected from bottom waters with low oxygen levels were dominated by Gammaproteobacteria while surface sediments collected from bottom waters under hypoxic conditions were dominated by Deltaproteobacteria, specifically sulfate-reducing bacteria. Thaumarchaeota was dominant across all surface sediments indicating that nitrogen cycling in this system is strongly influenced by ammonia-oxidizing archaea. This study provides a baseline assessment that may serve as a point of reference as this system changes or as the efficacy of new remediation efforts are implemented.},
doi = {10.1093/femsec/fiu013},
journal = {FEMS Microbiology Ecology (Online)},
number = 1,
volume = 91,
place = {United States},
year = {Fri Dec 05 00:00:00 EST 2014},
month = {Fri Dec 05 00:00:00 EST 2014}
}

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Cited by: 55 works
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  • Paruch, Lisa; Paruch, Adam M.; Eiken, Hans Geir
  • Microbial Biotechnology, Vol. 12, Issue 6
  • DOI: 10.1111/1751-7915.13461

Dynamics of Sulfate-Reducing Bacteria Community Structure in Surface Sediment of a Seasonally Hypoxic Enclosed Bay
journal, January 2018

  • Mori, Fumiaki; Umezawa, Yu; Kondo, Ryuji
  • Microbes and Environments, Vol. 33, Issue 4
  • DOI: 10.1264/jsme2.me18092

Sulfur-Oxidizing Bacteria Mediate Microbial Community Succession and Element Cycling in Launched Marine Sediment
journal, February 2017


Temperature Driven Changes in Benthic Bacterial Diversity Influences Biogeochemical Cycling in Coastal Sediments
journal, August 2018