Sökning: "Biology with specialization in Limnology"

Visar resultat 11 - 15 av 22 avhandlingar innehållade orden Biology with specialization in Limnology.

  1. 11. Diversity and Ecosystem Functioning : Redundancy and Resilience in Freshwater Bacterial Communities

    Författare :Hannes Peter; Lars J. Tranvik; Eva S. Lindström; Silke Langenheder; Nelson G. Hairston; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; biodiversity; ecosystem functioning; bacteria; fresh water; biofilms; multifunctionality; ecological networks; perturbation; fragility; Biologi med inriktning mot limnologi; Biology with specialization in Limnology;

    Sammanfattning : 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. LÄS MER

  3. 12. It's complicated: : The role of timing in microbial community coalescence

    Författare :Theresa Lumpi; Eva S. Lindström; Clara Ruiz-González; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; community coalescence; arrival timing; dispersal timing; microbial communities; community composition; lake bacteria; Biology with specialization in Limnology; Biologi med inriktning mot limnologi;

    Sammanfattning : In recent years, the importance of historical contingency has been increasingly recognized in microbial communities. During community coalescence, immigration history, and dispersal history can become decisive for the developing community. LÄS MER

  4. 13. Molecular-level dissolved organic matter dynamics in lakes : Constraints on reactivity and persistence

    Författare :Anne Marie Kellerman; Lars J. Tranvik; Dolly N. Kothawala; Thorsten Dittmar; Robert G. M. Spencer; Uppsala universitet; []
    Nyckelord :dissolved organic matter; DOM; dissolved organic carbon; organic matter characterization; fluorescence; PARAFAC; molecular weight; mass spectrometry; FT-ICR-MS; boreal lakes; Biology with specialization in Limnology; Biologi med inriktning mot limnologi;

    Sammanfattning : Dissolved organic matter (DOM) is a central component of the global carbon cycle. Thus, small changes to the amount of DOM imported, processed and produced within lakes can have a large effect on regional carbon budgets. In addition to being a vital energy source at the base of the aquatic food web, DOM is physico-chemically reactive. LÄS MER

  5. 14. Bottom-up and top-down regulation of heterogeneous lake food webs

    Författare :Fernando Chaguaceda; Peter Eklöv; Kristin Scharnweber; Lars Tranvik; Blake Matthews; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; food webs; resource coupling; ontogenetic diet shifts; resource specialization; bottom-up; top-down; browning; eutrophication; lake; mesocosms; fatty acids; apparent competition; Biology with specialization in Limnology; Biologi med inriktning mot limnologi;

    Sammanfattning : Food webs are networks of organisms linked by trophic interactions that regulate the responses of ecosystems to environmental change. Such regulation is a result of the effects of resources on the abundance of their consumers (i.e. bottom-up effects) and/or the influence of consumers on the abundance of their resources (i. LÄS MER

  7. 15. Bound to the past: Historical contingency in aquatic microbial metacommunities

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

    Sammanfattning : 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. LÄS MER