Microbial Organic Matter Degradation Potential in Baltic Sea Sediments Is Influenced by Depositional Conditions and In Situ Geochemistry

• Laura A. Zinke ^[3] ; Clemens Glombitza ^[1] ; Jordan T. Bird ^[4] ; Hans Røy ^[1] ; Bo Barker Jørgensen ^[1] ; Karen G. Lloyd ^[4] ; Jan P. Amend ^[5] ; Brandi Kiel Reese ^[2]
  1. [1] Aarhus University

     Aarhus University

     Dinamarca

     
  2. [2] Texas A&M University

     Texas A&M University

     Estados Unidos

     
  3. [3] a Department of Life Sciences, Texas A&M University Corpus Christi, Corpus Christi, Texas, USA; b Department of Biological Sciences, University of Southern California, Los Angeles, California, USA
  4. [4] d Department of Microbiology, University of Tennessee Knoxville, Knoxville, Tennessee, USA
  5. [5] b Department of Biological Sciences, University of Southern California, Los Angeles, California, USA; e Department of Earth Sciences, University of Southern California, Los Angeles, California, USA

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• Localización: Applied and Environmental Microbiology, ISSN 0099-2240, Vol. 85, Nº 4, 2019
• Idioma: inglés
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• Resumen

  • Sediments sequester organic matter over geologic time scales and impact global climate regulation. Microbial communities in marine sediments drive organic matter degradation, but the factors controlling their assemblages and activities, which in turn impact their role in organic matter degradation, are not well understood. Hence, determining the role of microbial communities in carbon cycling in various sediment types is necessary for predicting future sediment carbon cycling. We examined microbial communities in Baltic Sea sediments, which were deposited across various climatic and geographical regimes to determine the relationship between microbial potential for breakdown of organic matter and abiotic factors, including geochemistry and sediment lithology. The findings from this study will contribute to our understanding of carbon cycling in the deep biosphere and how microbial communities live in deeply buried environments.