Search for dissertations about: "species richness"

Showing result 1 - 5 of 137 swedish dissertations containing the words species richness.

  1. 1. Investigations of species richness effects on ecosystem functioning using stream-living macroinvertebrates as model organisms

    Author : Micael Jonsson; Umeå universitet.; [2003]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecology; Species richness; species loss; process rates; ecosystem function; streams; macroinvertebrates; Ekologi; NATURAL SCIENCES Biology Terrestrial; freshwater and marine ecology; NATURVETENSKAP Biologi Terrestisk; limnisk och marin ekologi;

    Abstract : The work in this thesis deals with effects of changed species richness on process rates among stream-living macroinvertebrates. Global biodiversity is decreasing rapidly and it is poorly known what the consequences of this loss may be for ecosystems and the services they provide. READ MORE

  2. 2. 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

  3. 3. Plant species richness and community assembly in Swedish semi-natural grasslands

    University dissertation from Stockholm : Stockholm University

    Author : Daniel Franzén; Stockholms universitet.; [2002]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; biodiversity; grasslands; species; plant ecology; botany; Sweden; Växtsamhällen; betesmarker; Biologisk mångfald; botanik;

    Abstract : .... READ MORE

  4. 4. Effects of climate change on boreal wetland and riparian vegetation

    University dissertation from Institutionen för ekologi, miljö och geovetenskap, Department of Ecology and Environmental Sciences

    Author : Lotta Ström; Umeå universitet.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; biomass; flooding; hydrologic niche; invasibility; riparian zone; riparian plant species; river margin; climate scenario; seed sowing experiment; species composition; species richness; transplant experiment; NATURAL SCIENCES Biology Terrestrial; freshwater and marine ecology Terrestrial ecology; NATURVETENSKAP Biologi Terrestrisk; limnisk och marin ekologi Terrestrisk ekologi;

    Abstract : Models of climate change predict that temperature will increase during the 21th century and the largest warming will take place at high northern latitudes. In addition to warming, predictions for northern Europe include increased annual precipitation and a higher proportion of the precipitation during winter falling as rain instead of snow. READ MORE

  5. 5. Soil phosphorus – a multidimensional resource that plays an important role for grassland plant species richness

    University dissertation from Institutionen för ekologi, miljö och geovetenskap, Department of Ecology and Environmental Sciences

    Author : Jakob Sandberg; Lunds universitet.; Lund University.; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; niche dimension; nutrient limitation; niche differentiation; competition; soil nitrogen; soil phosphorus; plant diversity; species richness; Grassland; land use; landscape scale;

    Abstract : Popular Abstract in Swedish Markfosfor och mångfald av växter i svenska gräsmarker – en populärvetenskaplig sammanfattning Olika typer av gräsmarkshabitat innehåller en stor och viktig del av mångfalden av växtarter i Skandinavien och i norra Europa. En stor del av arterna är knutna till kulturlandskapet och des's äldre hävdformer. READ MORE