Lloyd Lab

Department of Microbiology, University of Tennessee, M409 Walters Life Sciences, Knoxville, TN 37996, klloyd@utk.edu

       We work on determining the carbon and energy sources for the vast uncharacterized majority of marine microorganisms in hydrothermal vents, cold methane seeps, deep oceanic sediments, coastal estuaries and bays, and subduction zones.

       By coupling phylogenetic and functional information from RNA, DNA, and metabolites in whole marine sediments, single microbial cells, and laboratory mesocosms to geochemical parameters, we can link uncharacterized groups of organisms to their environmental functions.  We are particularly focused on transformations of organic matter and C1 compounds in the deep marine subsurface.

       Our field work is in Costa Rica, the  Baltic Sea, North Carolina, Svalbard, Siberia, and Mariana Trench Seamounts.

Karen Lloyd with PhD student, Kate Fullerton doing field work in Costa Rica. We study how microbes from hot springs across Costa Rica are connected to their deep subsurface source fluids.


Joides Resolution deep ocean drill ship from the IODP. We use samples from this ship to explore the deep oceanic subsurface biosphere.


Iceberg with veins of sediments in Kongsfjorden, Ny Alesund, Svalbard, 79°N. We study what happens to the sediments after they melt out and fall to the seafloor.


© Karen Lloyd 2018