Search for dissertations about: "limnologi"

Showing result 16 - 20 of 100 swedish dissertations containing the word limnologi.

  1. 16. Lake Dissolved Organic Matter Quantity and Quality Variability across Temporal and Spatial Scales

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Roger André Müller; Uppsala universitet.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; dissolved organic matter; organic carbon; CDOM; lakes; Biology with specialization in Limnology; Biologi med inriktning mot limnologi;

    Abstract : Surface waters receive large amounts of dissolved organic matter (DOM) via runoff from land. The DOM is rich in organic carbon that serves as an energy source for the aquatic biota. During uptake of this energy, aquatic organisms mineralize organic carbon. READ MORE

  2. 17. Diversity and Ecosystem Functioning Redundancy and Resilience in Freshwater Bacterial Communities

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Hannes Peter; Uppsala universitet.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; biodiversity; ecosystem functioning; bacteria; fresh water; biofilms; multifunctionality; ecological networks; perturbation; fragility; Biology with specialization in Limnology; Biologi med inriktning mot limnologi;

    Abstract : Bacteria are immensely diverse and hold key-positions in essentially all biogeochemical cycles. In freshwater ecosystems, bacteria degrade and mineralize organic compounds, linking the pool of dissolved organic matter to higher trophic levels. READ MORE

  3. 18. Assembly of Gut Microbial Communities in Freshwater Fish and Their Roles in Fish Condition

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Yinghua Zha; Uppsala universitet.; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; freshwater fish; gut microbial communities; predation stress; diet; fish condition; bacterial colonization; metacommunity theory; dispersal; Biology with specialization in Limnology; Biologi med inriktning mot limnologi;

    Abstract : Animal hosts provide associated microorganisms with suitable ecological niches in their intestines. Microbes help their hosts to digest food, protect against pathogens, and influence the host’s metabolisms. Compositional variation of gut microbial communities is common among hosts, and may affect the health status of hosts. READ MORE

  4. 19. Extent and limitations of functional redundancy among bacterial communities towards dissolved organic matter

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Martin Andersson; Uppsala universitet.; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Dissolved organic matter; BCC; biodiversity; functional redundancy; Mikrobiologi; Microbiology;

    Abstract : One of the key processes in the carbon cycle on our planet is the degradation of dissolved organic matter (DOM) in aquatic environments. The use of organic matter by bacteria links energy from DOM to higher trophic levels of the ecosystem when bacteria are consumed by other organisms. This is referred to as the microbial loop. READ MORE

  5. 20. Bacterial Degradation and Use of Chitin in Aquatic Habitats

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Sara Beier; Uppsala universitet.; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Chitin; organic matter degradation; microbial ecology; functional guild; NATURAL SCIENCES Biology; NATURVETENSKAP Biologi;

    Abstract : Chitin belongs to the most abundant biopolymers on earth where it has an important role as a structural element in crustaceans, insects, fungi and some phytoplankton. Missing evidence for long-term accumulation of chitin in nature implies fast turnover and as chitin is composed of aminosugar subunits it holds central roles in both carbon and nitrogen cycles. READ MORE