Research Interests
I have a variety of research interests primarily dealing with the interactions of microbes with the Earth system. Eventually I hope to fill this page with descriptions of my various research interests. For now, the following must suffice:
Methane Cycle
Anaerobic methane oxidation (in all environments).
Aerobic methane oxidation in marine waters.
Methanogenesis in marine sediments.
Atmospheric flux from geological sources.
Hydrogen Cycle
Hydrogen cycling in anoxic environments.
Hydrogen consumption in oxic soils.
Hydrogen production during nitrogen fixation.
Microbial Physiology
Bioenergetics of syntrophy.
Isotope fractionation (C and H) in microbes.
Halotolerance in anaerobes.
Growth of microbes under high gas pressure.
Lipid distributions in nature.
Hydrocarbon Biogeochemistry
Microbial oxidation of ethane, propane and butane.
Chemical and biological weathering of petroleum.
Other
Geomicrobiology of Mission Tunnel.
Carbon remineralization in anoxic sediments.
Phage communities in anoxic environments.