Search for dissertations about: "shade tree species"

Showing result 1 - 5 of 11 swedish dissertations containing the words shade tree species.

  1. 1. The relationship between climate, disease and coffee yield: optimizing management for smallholder farmers

    Author : Biruk Ayalew Nurihun; Ayco J. M. Tack; Kristoffer Hylander; Ivette Perfecto; Stockholms universitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Agroforestry; Arabica coffee; climate change; fungal disease; host-hyperparasite interaction; insect pest; minimum temperature and maximum temperature; shade cover; shade tree species; smallholder farmers; yield; Ecology and Evolution; ekologi och evolution;

    Abstract : Climate change and diseases are threatening global crop production. Agroforestry systems, which are characterized by complex multispecies interactions, are considered to provide nature-based solutions for climate change mitigation and pest and disease regulation. READ MORE

  2. 2. The impact of forest on pest damage, pollinators and pollination services in an Ethiopian agricultural landscape

    Author : Ulrika Samnegård; Kristoffer Hylander; Peter Hambäck; Sileshi Nemomissa; Jaboury Ghazoul; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; agroforestry; Apoidea; Coffea arabica; crop pests; Ethiopia; forest cover; landscape ecology; moist afromontane forests; pollination; species composition; tropical agriculture; Plant Ecology; växtekologi;

    Abstract : The distribution of wild biodiversity in agroecosystems affect crop performance and yield in various ways. In this thesis I have studied the impact of wild biodiversity, in terms of trees and forest structures, on crop pests, pollinators and the pollination services provided in a heterogeneous landscape in southwestern Ethiopia. READ MORE

  3. 3. Climate regulation provided by urban greening - examples from a high latitude city

    Author : Janina Konarska; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Gothenburg; Sweden; high latitude city; urban greenery; urban trees; leaf area index; tree transpiration; sky view factor; mean radiant temperature; hemispherical photography; climate-sensitive planning;

    Abstract : Cities exert a strong influence on urban climate, and consequently on human health and wellbeing. This increases the importance of considering climate issues in urban planning, particularly in the context of global climate change. One of the key adaptation strategies in climate-sensitive planning is urban greenery. READ MORE

  4. 4. Woody or treeless pastures? Effects of EU tree density limitations on biodiversity in woody pastures

    Author : Simon Jakobsson; Regina Lindborg; Tomas Pärt; Stockholms universitet; []

    Abstract : The high biological and cultural values of traditionally managed rural landscapes are threatened by habitat change and degradation due to homogenisation through modern agricultural practices and abandonment. Woody pastures are important for many different taxa, and hence crucial for biodiversity conservation in these agricultural landscapes. READ MORE

  5. 5. Plant Population Dynamics of Dodonaea angustifolia and Olea europaea ssp. cuspidata in Dry Afromontane Forests of Ethiopia

    Author : Tesfaye Bekele; Ingvar Backéus; Karin Bengtsson; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Demography; Dodonaea angustifolia; Elasticity; Establishment; Germination; Natural regeneration; Olea europaea ssp. cuspidata; Population structure; Recruitment; Seed bank; Survival; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; Ecological Botany; Ekologisk botanik;

    Abstract : Human disturbance has led to excessive deforestation and to a very limited forest cover in the Afromontane zone of Ethiopia, which forms a large part of the country. Thus urgent conservation measures are required to ameliorate the situation. READ MORE