HR: 1340h
AN: OS43A-0536    [Abstracts]
TI: Paleoclimate feeback involving co-oxidation of alpha-pinene by methane oxidizers
AU: * de Angelis, M A
EM: mad1@humboldt.edu
AF: Humboldt State University, Department of Oceanography, Arcata, CA 95521 United States
AB: The methane mononxygenase (MMO) enzyme of methane oxidizing bacteria is relatively non-specific and is capable of co-oxidizing a variety of methylated compounds including alpha-pinene produced by conifers. Laboratory and field experiments indicate that aquatic and soil methane oxidation is inhibited by the presence of alpha-pinene as the MMO preferentially oxidizes pinene over methane. Since methane is a potent greenhouse gas, this suggests possible climatic controls between atmospheric methane levels and coverage of coniferous pine forests which may be reflected in stable isotope records.
DE: 1050 Marine geochemistry (4835, 4850)
DE: 1615 Biogeochemical processes (4805)
DE: 0315 Biosphere/atmosphere interactions
SC: Ocean Sciences [OS]
MN: 2004 AGU Fall Meeting