Aerobic and Anaerobic Oxidation of Methane in Sediments of Lake Constance
نویسندگان
چکیده
13 Introduction 13 Materials and Methods 15 Results 19 Discussion 23 Acknowledgements 29 Chapter 3 Activity and Diversity of Methanotrophic Bacteria at Methane Seeps in Eastern Lake Constance Sediments 30 Abstract 30 Introduction 30 Materials and methods 31 Results 35 Discussion 42 Acknowledgements 4530 Introduction 30 Materials and methods 31 Results 35 Discussion 42 Acknowledgements 45
منابع مشابه
Anaerobic oxidation of methane in sediments of Lake Constance, an oligotrophic freshwater lake.
Anaerobic oxidation of methane (AOM) with sulfate as terminal electron acceptor has been reported for various environments, including freshwater habitats, and also, nitrate and nitrite were recently shown to act as electron acceptors for methane oxidation in eutrophic freshwater habitats. Radiotracer experiments with sediment material of Lake Constance, an oligotrophic freshwater lake, were per...
متن کاملActivity and diversity of methanotrophic bacteria at methane seeps in eastern Lake Constance sediments.
The activity and community structure of aerobic methanotrophic communities were investigated at methane seeps (pockmarks) in the littoral and profundal zones of an oligotrophic freshwater lake (Lake Constance, Germany). Measurements of potential methane oxidation rates showed that sediments inside littoral pockmarks are hot spots of methane oxidation. Potential methane oxidation rates at littor...
متن کاملAbundance and activity of methanotrophic bacteria in littoral and profundal sediments of lake constance (Germany).
The abundances and activities of aerobic methane-oxidizing bacteria (MOB) were compared in depth profiles of littoral and profundal sediments of Lake Constance, Germany. Abundances were determined by quantitative PCR (qPCR) targeting the pmoA gene and by fluorescence in situ hybridization (FISH), and data were compared to methane oxidation rates calculated from high-resolution concentration pro...
متن کاملMethanotrophy under Versatile Conditions in the Water Column of the Ferruginous Meromictic Lake La Cruz (Spain)
Lakes represent a considerable natural source of methane to the atmosphere compared to their small global surface area. Methanotrophs in sediments and in the water column largely control methane fluxes from these systems, yet the diversity, electron accepting capacity, and nutrient requirements of these microorganisms have only been partially identified. Here, we investigated the role of electr...
متن کاملMethane release from sediment seeps to the atmosphere is counteracted by highly active Methylococcaceae in the water column of deep oligotrophic Lake Constance.
Methane emissions from freshwater environments contribute substantially to global warming but are under strong control of aerobic methane-oxidizing bacteria. Recently discovered methane seeps (pockmarks) in freshwater lake sediments have the potential to bypass this control by their strong outgassing activity. Whether this is counteracted by pelagic methanotrophs is not well understood yet. We ...
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