Search for dissertations about: "ecological continuity"

Showing result 1 - 5 of 9 swedish dissertations containing the words ecological continuity.

  2. 1. Description of spatial and temporal distributions of epiphytic lichens

    Author : Håkan Lättman; Per Milberg; Bengt Gunnar Jonsson; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; centroid; continuity; lichen; movement; range shift; direction; dispersal; ecological continuity; establishment; global change; global warming; habitat availability; håkan lättman; Biology; Biologi;

    Abstract : Lichens are, in most cases, sensitive to anthropogenic factors such as air pollution, global warming, forestry and fragmentation. Two studies are included in this thesis. The first is an evaluation of the importance of old oak for the rare epiphytic lichen Cliostomum corrugatum (Ach.) Fr. READ MORE

  4. 2. Diversified agroecosystems for biodiversity and ecosystem services : Ecological intensification of faba bean cropping under land use and climate change

    Author : Chloë Raderschall; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Loss of natural habitats and lack of continuous floral resources in intensive agricultural landscapes limit the population growth of ecosystem service providers, such as pollinators. Weakened ecosystem service delivery and climate change stressors contribute to crop yield instability. READ MORE

  5. 3. Hyperspectral and multispectral remote sensing for mapping grassland vegetation

    Author : Thomas Möckel; Institutionen för naturgeografi och ekosystemvetenskap; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Plant diversity Partial least squares Ellenberg indicators Vegetation index Heterogeneity;

    Abstract : As a consequence of agricultural intensification, large areas of species-rich grasslands have been lost and farmland biodiversity has declined. Previous studies have shown that the continuity of grazing management can have a significant influence on the environmental conditions and the levels of plant species diversity in grassland habitats. READ MORE

  6. 4. Living on Another Shore : Early Scandinavian Settlement on the North-Western Estonian Coast

    Author : Felicia Markus; Anders Kaliff; Göran Hoppe; Kerstin Cassel; Uppsala universitet; []
    Keywords : HUMANIORA; HUMANITIES; Archaeology; Estonia; Estonian Swedes; Scandinavian settlement; Iron Age; early Medieval Period; colonisation; ethnic identity; migration; Baltic Sea; contacts; Christianisation; Arkeologi; Archaeology subjects; Arkeologiämnen; arkeologi; Archaeology;

    Abstract : Prior to the Second World War, there was a Swedish-speaking population settled on the north-western Estonian coasts. The early history of this group is largely unknown. No colonisation is mentioned in the written sources. The earliest such sources that mention Swedes originate in the late thirteenth century. READ MORE

  7. 5. Establishment, Growth and Population Dynamics in two Mosses of Old-growth Forests

    Author : Karin Wiklund; Håkan Rydin; Staffan Karlsson; Lloyd Stark; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biology; Buxbaumia viridis; Neckera pennata; bryophyte; pH; phosphorus; water potential; precipitation; metapopulation; environmental stochasticity; ecology; plant; Biologi; Biology; Biologi;

    Abstract : Biodiversity in forests depends on long canopy continuity and existence of different elements which function as substrates for varying organisms. Bryophytes often occupy specific substrates with a patchy distribution. READ MORE