Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"semi-natural habitat"”.
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Landscape composition and configuration affect nest founding but not success of bumble bee colonies in agroecosystems in the Lower Mainland of British Columbia, Canada.
… is likely to affect pollinator demography. Using naturally colonized nest boxes placed at 27 sites in the Lower Mainland of British Columbia, I assessed demographic responses of bumble bees to the availability of resources as inferred from landscape structure (i.e., landscape composition and …
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Efficacy of Nest Boxes for Wild Bumblebees as a Supplemental Pollination Strategy in Highbush Blueberry
… occupation in 2022 and 18% occupation in 2023. Semi-natural habitat had a contrasting effect on both box occupation and in-field observations. Occupied boxes had a positive effect on bumblebee observations in 2023 when there were fewer bees present overall, pointing to potential for mitigating …
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Diversity and Abundance of Bees in Canadian Prairie Agroecosystems: Understanding the Role of Remnant and Restored Habitat in Supporting Native Bee Populations
Habitat loss due to agricultural intensification has negative implications for native bee communities throughout Western Canada. Wetland remnants are a common feature within the Prairie Pothole Region of Saskatchewan and are threatened due to continued conversion to agricultural land. Approximately …
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Organisation, landowner and farmer management in the conservation of blanket mires
Despite being Britain's most extensive semi-natural habitat, less research has been carried out on blanket mires than on many other habitats. This is possibly a result of their relative inaccessibility, since they are mainly confined to upland areas in England and Wales and remoter parts of …
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Post-management vegetation change in upland heather moorland, with particular reference to the nutrient status of soils : Lake Vyrnwy Estate, Powys, Mid Wales
… of heather moorland. This provides an essential habitat for diverse populations of ground-nesting moorland birds. Common heather - Calluna vulgaris (L) Hull - is typically the dominant species of this semi-natural habitat, providing both nutrition and cover for these bird …
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Landscape-scale mechanisms of biological pest control in a South Korean agricultural landscape
… control is a major ecosystem service provided by natural enemies to world crops. However, current understanding of how to manage this service in real-world landscapes is limited by our lack of knowledge of the factors determining landscape-scale pest control, enemy diversity and the relationship …
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A comparison of the costs of delivering conservation through land sharing and land sparing
… to be spared elsewhere in the landscape as (semi-)natural habitat. Following Brexit, the UK has the opportunity to rethink this approach; but until now policy decisions have had to be made without estimates of the relative taxpayer costs of using sharing and sparing to deliver target …
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Assessing adaptive winter behaviors of beneficial arthropods, with a focus on the long-distance migratory ecology of Nearctic hover flies (Diptera: Syrphidae)
… the effects of field borders on arthropod natural enemy communities. Syrphid hover flies of the subfamily Syrphinae are an important group of arthropods. Adults are pollinators for a variety of crop and non-crop plant species, while larvae act as biological control agents for major crop …