Search for dissertations about: "biotic interactions"

Showing result 1 - 5 of 53 swedish dissertations containing the words biotic interactions.

  1. 1. Phenolics, Nitrogen, and Biotic Interactions A Study of Phenylpropanoid Metabolites and Gene Expression in the Leaves of Populus tremula

    University dissertation from Umeå : Umeå University

    Author : Vicki Huizu Decker; Umeå universitet.; Umeå universitet.; [2016]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Populus tremula; condensed tannins; salicinoids; phenolics; genetic variation; soil nitrogen fertilization; herbivory; biology; biologi;

    Abstract : European aspen (Populus tremula) is a fast growing tree species, rich in phenolic compounds. Defense theories suggest that soil nitrogen greatly influence plant allocation togrowth and defense; however, the allocation priorities are not well understood. READ MORE

  2. 2. Spatial heterogeneity and biotic interactions scaling from experiments to natural systems

    University dissertation from Umeå : Umeå University

    Author : Ulf Bergström; Umeå universitet.; [2004]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecology; Ekologi; NATURAL SCIENCES Biology Terrestrial; freshwater and marine ecology; NATURVETENSKAP Biologi Terrestisk; limnisk och marin ekologi; zooekologi; Animal Ecology;

    Abstract : Much of current ecological theory stems from experimental studies. These studies have often been conducted in closed systems, at spatial scales that are much smaller than the systems of interest. READ MORE

  3. 3. Indirect biotic interactions in the rhizosphere

    University dissertation from Lund University (Media-Tryck)

    Author : Natalia Ladygina; Lunds universitet.; Lund University.; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : The rhizosphere (the soil environment around plant roots) is characterized by complex direct and indirect interactions among its organisms. Studies of interactions among organisms in the rhizosphere are difficult to carry out due to a high diversity of inconspicuous organisms on a micro scale and the highly heterogeneous nature of the soil environment. READ MORE

  4. 4. Biotic interactions in fish and mysid communities : studies in two Baltic coastal areas

    University dissertation from Stockholm : Dept. of Zoology [Zoologiska institutionen], Univ

    Author : Sture Hansson; Stockholms universitet.; [1989]
    Keywords : ;

    Abstract : .... READ MORE

  5. 5. Biotic resistance in freshwater fish communities

    University dissertation from Umeå : Umeå universitet

    Author : Anna Henriksson; Umeå universitet.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; biotic resistance; freshwater fish; introductions; invasions; invasion success; invasibility; invasiveness; species richness; saturation; species identity; weighted species richness;

    Abstract : Invasions of non-native species cause problems in ecosystems worldwide, and despite the extensive effort that has been put into research about invasions, we still lack a good understanding for why some, but not other, communities resist these invasions. In this doctoral thesis I test hypotheses on biotic resistance using a large dataset of more than 1000 both failed and successful introductions of freshwater fish into Swedish lakes. READ MORE