Aerobic methane synthesis and dynamics in a river water environment
نویسندگان
چکیده
Reports of aerobic biogenic methane (CH4) have generated new views about CH4 sources in nature. We examine this phenomenon the free-flowing Yellowstone river wherein concentrations were tracked as a function environmental conditions, phototrophic microorganisms (using chlorophyll a, Chl proxy), well targeted methylated amines known to be associated with process. was positively correlated temperature and although diurnal measurements showed greatest during night lowest maximal solar irradiation. efflux from surface greater quiescent edge waters (71–94 μmol m−2 d) than open flowing current (~ 57 d). Attempts increase flux by disturbing benthic environment water directly below 1.0 m deep) or at varying distances (0–5 m) upstream chamber failed flux. Glycine betaine (GB), dimethylamine methylamine (MMA) observed throughout summer-long study, increasing period coinciding marked decline suggesting lytic event led their release; however, did not correspond increased concentrations. Spiking GB MMA yielded significantly nonspiked controls, illustrating metabolic potential microbiome. In summary, study provides evidence that: (1) are involved synthesis environment; (2) microbiome possesses convert CH4; (3) dynamic diurnally summer active months.
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ژورنال
عنوان ژورنال: Limnology and Oceanography
سال: 2023
ISSN: ['1939-5590', '0024-3590', '1939-5604']
DOI: https://doi.org/10.1002/lno.12383