Beurteilende*r| Name: | Univ.Prof. Dr. Thomas Hein |
| Herkunftsbetrieb: | |
| 1.Mitwirkender |
| Name: | Ass.Prof. Priv.-Doz. Mag. Dr. Gabriele Weigelhofer |
| Herkunftsbetrieb: | |
| Arbeit |
| Typ der Arbeit: | Masterarbeit |
| Sprache der Arbeit: | Englisch |
| Titel der Arbeit in Originalsprache: | Impact of Land use on water quality, sediment composition and functional response of microbial communities in three streams of Nzoia catchment |
| Titel der Arbeit in deutsch: | Impact of land use on water quality, sediment composition and functional response of microbial communities in three streams of Nzoia catchment. |
| Titel der Arbeit in englisch: | Impact of Land use on water quality, sediment composition and functional response of microbial communities in three streams of Nzoia catchment |
| Publikationsmonat: | 04.2020 |
| Seitenanzahl: | 74 |
| Volltext |
| Volltext der Arbeit: | Volltext der Arbeit im PDF-Format laden |
| Online-Katalog der Universitätsbibliothek Bodenkultur |
| AC-Nummer: | AC15692744 |
| Abstract |
| Abstract in Deutsch: | ABSTRACT.
Land use change from forests to crop land has changed catchments. The deforestation in the recent years is to acquire land for production. Yet these changes have impacts on aquatic ecosystems. The study in three tributaries in Mt Elgon Kenya, aimed at investigating the influence of the shift from forested to agricultural land use on stream functioning in relation to water quality, bacterial abundances, functional group diversity and their responses to stress from the changed land use. Physico parameters where measured insitu, water samples were collected for analysis of nutrient properties. Sediment samples were collected for analysis of sediment grain size, microbial oxygen consumption rate, system productivity, bacterial abundances and functional group diversity. Sediment grain size distribution in streams was classified. Microbial oxygen consumption rate, primary production was measured as a change in oxygen concentration in incubated chambers subjected to dark and light conditions at room temperature. Bacterial abundances were investigated using the fluorescent staining method and functional group diversity was assessed using carbon substrate utilization. The limnological parameters were significantly different between stream sections. Higher nutrient concentrations and fine sediment accumulation, high oxygen consumption rates and system primary productivity were noted in agricultural sections and high bacterial abundances.
|
| Abstract in Englisch: | ABSTRACT.
Land use change from forests to crop land has changed catchments. The deforestation in the recent years is to acquire land for production. Yet these changes have impacts on aquatic ecosystems. The study in three tributaries in Mt Elgon Kenya, aimed at investigating the influence of the shift from forested to agricultural land use on stream functioning in relation to water quality, bacterial abundances, functional group diversity and their responses to stress from the changed land use. Physico parameters where measured insitu, water samples were collected for analysis of nutrient properties. Sediment samples were collected for analysis of sediment grain size, microbial oxygen consumption rate, system productivity, bacterial abundances and functional group diversity. Sediment grain size distribution in streams was classified. Microbial oxygen consumption rate, primary production was measured as a change in oxygen concentration in incubated chambers subjected to dark and light conditions at room temperature. Bacterial abundances were investigated using the fluorescent staining method and functional group diversity was assessed using carbon substrate utilization. The limnological parameters were significantly different between stream sections. Higher nutrient concentrations and fine sediment accumulation, high oxygen consumption rates and system primary productivity were noted in agricultural sections and high bacterial abundances.
|
| Schlagworte |
| Schlagwörter Deutsch: | land use , oxygen consumption, primary production, microbial communities, nutrients |
| Schlagwörter Englisch: | land use , oxygen consumption, primary production, microbial communities, nutrients |
| Sonstiges |
| Signatur: | D-12630 |
| Organisationseinheit, auf der die Arbeit eingereicht wird: | H81200 Institut für Hydrobiologie und Gewässermanagement (IHG) |
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