Microbiology Experts

Karen Lloyd

Assistant Professor
Department of Microbiology
Tennessee State University
United States of America


Dr.Karen Lloyd has completed her PhD in 2009 from University of North Carolina, Chapel Hill and presently working as Assistant Professor at  University of Tennessee.  

Research Interest

Our research integrates geomicrobiology, molecular biology, and geochemistry to determine how microorganisms influence marine geochemical cycles. The goal is to link uncultivated microorganisms to their geochemical functions and explore how these communities react to changing environmental conditions.   


  • Dhillon A, Lever M, Lloyd KG, Albert DB, Sogin ML, Teske A. Methanogen diversity evidenced by molecular characterization of methyl coenzyme M reductase A (mcrA) genes in hydrothermal sediments of the Guaymas Basin. Applied and Environmental Microbiology. 2005 Aug 1;71(8):4592-601.

  • Lloyd KG, Lapham L, Teske A. An anaerobic methane-oxidizing community of ANME-1b archaea in hypersaline Gulf of Mexico sediments. Applied and Environmental Microbiology. 2006 Nov 1;72(11):7218-30.

  • Lloyd KG, Schreiber L, Petersen DG, Kjeldsen KU, Lever MA, Steen AD, Stepanauskas R, Richter M, Kleindienst S, Lenk S, Schramm A. Predominant archaea in marine sediments degrade detrital proteins. Nature. 2013 Apr 11;496(7444):215.

  • Biddle JF, Lipp JS, Lever MA, Lloyd KG, Sørensen KB, Anderson R, Fredricks HF, Elvert M, Kelly TJ, Schrag DP, Sogin ML. Heterotrophic Archaea dominate sedimentary subsurface ecosystems off Peru. Proceedings of the National Academy of Sciences of the United States of America. 2006 Mar 7;103(10):3846-51.

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