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| Titel |
Activity of methane oxidizing bacteria along the River Elbe downstream to its estuary |
| VerfasserIn |
A. Matoušů, K. Šimek, I. Bussmann |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250062572
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| Zusammenfassung |
| Contribution of rivers and estuarine systems to the global methane (CH4) budget is still not
clear yet and for improving the estimations on the CH4 emission it is essential to cover the
whole natural system in large-scale studies. In this context we quantified the activity of
methane oxidizing bacteria (as a microbial “biofilter”) over almost two seasons along a large
European river system, the river Elbe, from its source in the Czech Republic towards to its
estuary in the North Sea. Determination of methane oxidation rate was measured using a
tritiated CH4 radiotracer technique. Methane concentrations in the water column were
analyzed by the headspace method.
The range of CH4concentrations and related microbial oxidation activities displayed a
strong increase from the upper river parts, which includes mainly natural river, to the polluted
downstream canalized parts of the river with high CH4concentrations and microbial activities,
where anaerobic sediments occur. In the water column of the estuarine zone a sharp decrease
of the CH4 concentration- and CH4 oxidation rates is mainly influenced by the increasing
salinity.
Additional parameters (temperature, dissolved oxygen, amount of suspended particular
matter and nutrient content) are possible factors influencing the methanotrophic activity.
Further investigations will compare the population structure of MOB at the different sites
along the whole transect. |
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