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Master Project: Cycling of methane in the Mackenzie delta lakes
The behavior of Arctic lakes, especially those of the Mackenzie River delta, as sources and sinks of greenhouse gases remain largely unknown. ...
The behavior of Arctic lakes, especially those of the Mackenzie River delta, as sources and sinks of greenhouse gases remain largely unknown. Most of the lakes of the Mackenzie delta are affected by permafrost thawing which add carbon to the system and might lead to high concentrations of methane (CH4) during winter and enhanced increases in CH4 emissions from the lakes in summer. Recent studies have shown that methane-oxidizing bacteria may be widely important in the Mackenzie delta food webs, indicated by the relative depletion in δ13C of microzooplankton relatively to heterotrophic bacteria.
The behavior of Arctic lakes, especially those of the Mackenzie River delta, as sources and sinks of greenhouse gases remain largely unknown. Most of the lakes of the Mackenzie delta are affected by permafrost thawing which add carbon to the system and might lead to high concentrations of methane (CH4) during winter and enhanced increases in CH4 emissions from the lakes in summer. Recent studies have shown that methane-oxidizing bacteria may be widely important in the Mackenzie delta food webs, indicated by the relative depletion in δ13C of microzooplankton relatively to heterotrophic bacteria.
By investigating the stable carbon isotopic signature of methanogen and methanotroph biomarkers (e.g. archaeol, GDGT, BHP, FA) in sediment cores, we could acquire information on the microbial ecosystem dynamic of CH4 production and utilization.
By investigating the stable carbon isotopic signature of methanogen and methanotroph biomarkers (e.g. archaeol, GDGT, BHP, FA) in sediment cores, we could acquire information on the microbial ecosystem dynamic of CH4 production and utilization.
Dr. Julie Lattaud, julie.lattaud@erdw.ethz.ch
julielattaud.mystrikingly.com
Dr. Julie Lattaud, julie.lattaud@erdw.ethz.ch julielattaud.mystrikingly.com