Essays about: "insect populations"
Showing result 1 - 5 of 24 essays containing the words insect populations.
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1. Quantity and quality of oaks (Quercus) as suitable habitats for the longhorn beetle species Plagionotus detritus : An inventory study in Stockholm and Uppsala County, Sweden
University essay from Uppsala universitet/Institutionen för biologisk grundutbildningAbstract : The longhorn beetle Plagionotus detritus is associated with newly dead oak wood and is declining throughout its distribution range. In Sweden, P.detritus has displayed one of the most dramatic reductions in distribution recorded for insect species and is near regional extinction. READ MORE
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2. Stödgrödors betydelse för pollinatörer : en litteraturstudie om möjligheter och utmaningar vid nyttjandet av understödjande grödor i agroekosystem
University essay from SLU/Dept. of EcologyAbstract : Pollinatörer utför en viktig ekosystemtjänst då de bidrar till att säkerställa skörden av flertalet livsmedelsgrödor. Andelen pollinerande insekter i jordbruket har dock minskat till följd av ett flertal störningsfaktorer och brist på blomresurser. READ MORE
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3. The effects of a land reform program on smallholder farmers’ livelihoods and availability of edible insects for food and nutrition security : the case of the Zvimba and Mhondoro districts of Zimbabwe
University essay from SLU/Dept. of Urban and Rural DevelopmentAbstract : Edible insects are an important source of nutrition for rural populations in many parts of the world, including Zimbabwe. This research examines the contribution of edible insects to the livelihoods, food and nutrition security, and the strategies and mechanisms that can be implemented to ensure the preservation and better management of the environment and edible insects in Zvimba and Mhondoro districts. READ MORE
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4. Direct and indirect effects of roe deer (Capreolus capreolus) herbivory on an island population of Chequered blue butterfly (Scolitantides orion).
University essay from Uppsala universitet/Institutionen för biologisk grundutbildningAbstract : Herbivory by ungulates is a known agent of disturbance in many ecological systems around the globe. At high abundances and through a selective foraging behaviour herbivory may inflict significant direct and indirect effects on local plant and animal communities. READ MORE
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5. The effect of restoration of semi-natural grassland on arthropod populations
University essay from Linköpings universitet/Institutionen för fysik, kemi och biologiAbstract : Semi-natural grasslands are valuable ecosystems that have a high biodiversity. Unfortunately, a lot of this biodiversity is being lost as semi-natural grasslands are declining in both size and number. Restoration to reestablish semi-natural grasslands is often done by removing shrubs and trees and planting seeds. READ MORE