Andrew D. Steen bio photo

Andrew D. Steen

I'm interested in carbon, microorganisms, and aquatic ecosystems.

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Lab Members and Alumni

Current Lab Members

  • Drew Steen: Lab PI. email: asteen1@utk.edu
  • Abby Barrett: Master’s student. Controls on extracellular enzymes in freshwater systems.
  • Lauren Mullen: Lab Manager. Has worked on peptidase activities in East Tennessee waters and methods development for hydroxyl radical quantitation in sediment porewater.

Lab Alumni

  • Jenna Schmidt: Master’s student, graduated 2016. Activities of extracellular enzymes in deep sediments of the Baltic Sea Basin.
    • Master’s thesis: link. Paper in prep.
  • Austen Webber: Lab manager 2014-2015; dissolved organic matter production by virus-infected bacteria (in prep) and , now Ph.D. student in the Thrash Lab at LSU.
    • Characterization of a novel peptidase from an uncultured Archaeon: paper
    • DOM production by virus-infected bacteria (in prep)
  • Drew Mather: Effect of extracellular enzymes on marine sediment, now in the Peace Corps.
  • Katherine Mulligan: Substrate specificties of extracellular enzymes (paper); activities of extracellular enzymes in sediments of the White Oak River estuary, NC (manuscript in prep). Now at East Carolina University School of Medicine.
  • Shane Hagen: Substrate specificties of extracellular enzymes (paper); activities of extracellular enzymes in sediments of the White Oak River estuary, NC (manuscript in prep), activities of extracellular enzymes in ultra-oligotrophic sediments of the Eastern Mediterranean (manuscript in prep).
  • Jasmine Vazin: Substrate specificity of extracellular enzymes (paper). Now regulatory affairs manager at Green Source Organics.