During this PhD. thesis, the importance of methane-oxidizing bacteria (methanotrophs) and their ecological demands were studied on the longitudinal transect along an important European river - the River Elbe. However, it was necessary to adjust methodologies for precise measurements of methane oxidation in such a variable aquatic environment. Based on laboratory experiments and field measurements, several key methodological recommendations for future planning of methane oxidation rate estimations in an unknown environment have been identified or specified. In line with the variability of the river habitats, considerable heterogeneity was also found in the obtained data on methane concentration and methanotrophical activity. Probably, some of the most important information gathered during many field sampling campaigns is that sites with the highest methane concentration usually showed a very low activity of methanotrophic bacteria (resulting in higher methane emissions). These sites are predominantly human modified sections of the river, such as locks, weirs, harbors and canals. On the contrary, the free-flowing parts of the river, modified only by groynes, showed low level of methane concentration. And so groynes could represent a more effective solution and "natural-close" habitats of navigability of rivers.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:354707 |
| Date | January 2017 |
| Creators | MATOUŠŮ, Anna |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/doctoralThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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