This study evaluates rates and pathways of methane (CH ) oxidation and uptake using C-based tracer experiments throughout the oxic and anoxic waters of ferruginous Lake Matano. Methane oxidation rates in Lake Matano are moderate (0.36 nmol L day to 117 μmol L day ) compared to other lakes, but are sufficiently high to preclude strong CH fluxes to the atmosphere.
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