Sökning: "ecological continuity"
Visar resultat 1 - 5 av 9 avhandlingar innehållade orden ecological continuity.
1. Description of spatial and temporal distributions of epiphytic lichens
Sammanfattning : 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. LÄS MER
2. Diversified agroecosystems for biodiversity and ecosystem services : Ecological intensification of faba bean cropping under land use and climate change
Sammanfattning : 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. LÄS MER
3. Hyperspectral and multispectral remote sensing for mapping grassland vegetation
Sammanfattning : 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. LÄS MER
4. Living on Another Shore : Early Scandinavian Settlement on the North-Western Estonian Coast
Sammanfattning : 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. LÄS MER
5. Establishment, Growth and Population Dynamics in two Mosses of Old-growth Forests
Sammanfattning : 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. LÄS MER