Search for dissertations about: "limnologi"

Showing result 26 - 30 of 115 swedish dissertations containing the word limnologi.

  2. 26. Bound to the past: Historical contingency in aquatic microbial metacommunities

    Author : Máté Vass; Silke Langenheder; Steven Declerck; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; metacommunity; historical processes; priority effects; community assembly.; Biology with specialization in Limnology; Biologi med inriktning mot limnologi;

    Abstract : The composition of ecological communities differs due to a combination of different processes, which includes selection by local environmental conditions, dispersal from the regional species pool and random events. Additionally, historical processes such as past dispersal events may leave their imprint on communities as well, resulting in historically contingent communities. READ MORE

  4. 27. Assembly of Gut Microbial Communities in Freshwater Fish and Their Roles in Fish Condition

    Author : Yinghua Zha; Richard Svanbäck; Eva Lindström; Peter Eklöv; Brendan Bohannan; Uppsala universitet; []
    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

  5. 28. Extent and limitations of functional redundancy among bacterial communities towards dissolved organic matter

    Author : Martin Andersson; Eva Lindström; Stuart Jones; Uppsala universitet; []
    Keywords : 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

  6. 29. Fish population responses to climate change : Causes and consequences

    Author : Matilda L. Andersson; Peter Eklöv; Brian Hayden; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; browning; climate change; DOC; intraspecific variation; metabolism; resource use; warming;

    Abstract : Lake environments are heterogeneous, and animals show a variety of adaptations to deal with this heterogeneity. Fish often show intraspecific variation in diet, metabolism, and behavior, corresponding to their habitat use. READ MORE

  7. 30. Modelling impact climate-related change on the thermal responses of lakes

    Author : Ana I. Ayala; Donald C. Pierson; Stéphane Goyette; Andreas Lorke; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Modelling; climate change; lakes; thermal structure; surface heat fluxes; extreme events;

    Abstract : In response to climate-related changes, lakes worldwide have experienced warmer surface water temperatures, shorter ice cover periods and changes in lake stratification. As these aspects of lake dynamics exert substantial control over nutrient availability, oxygenation and biogeochemical cycling, predicting changes in lake water temperature and stratification dynamics can improve our understanding of the consequences of warming on lake ecosystems. READ MORE