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 16 of 16 for “"Bee communities"”.
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The Importance Of Surface Mining As A Landscape Variable In Shaping Wild Bee Communities In Central Appalachian Forests
… led to widespread losses in biodiversity. Native bees (Hymenoptera, Apoidea) provide essential pollination services and have been declining in abundance dramatically in recent years. One potential cause of these declines is anthropogenic disturbance. Eleven sites were established in Southeastern …
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Bees, Bombs, and Burns: Disturbance and the Native Bee Communities of Military and Other Public Lands in Virginia
… successional habitats, which can support diverse communities of native plants and animals. These lands may serve as refugia, protecting rare, threatened, and endangered species that may have disappeared from surrounding areas, particularly those that need disturbance to survive on the landscape. …
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The effects of wildflower plots and diverse landscapes on ecosystem services, bee communities, and on-farm tick abundance
… applications of cost-sharing programs have not been evaluated in the United States on pollination services and biological control. Furthermore, these tactics may inadvertently perform ecosystem disservices, like increasing crop pests or creating habitat for disease vectors. In this study, we …
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Wild bees in temperate deciduous forests: how does management affect bee communities, and can we use active remote sensing data to model bee biodiversity?
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-12-01
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Floral abundance and soil characteristics affect wild bee community structures and nesting dynamics in tallgrass prairies
Tallgrass prairies have been reduced to less than 5% of their former range, yet provide essential habitats for many native plants and animals such as pollinators. Land managers work to preserve the biodiversity within these tallgrass prairies by implementing management techniques such as burning, …
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Annual Variation in Bee Community Structure in the Context of Disturbance (Niagara Region, South-Western Ontario)
… in phenology, abundance and diversity of a bee community during 2003, 2004, 2006, and 2008 in recovered landscapes at the southern end of St. Catharines, Ontario, Canada. Overall, 8139 individuals were collected from 26 genera and sub-genera and at least 57 species. These individuals …
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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
… 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 sixty-one million acres of land are …
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The Effects of Wildfire Burn Severity on Bee and Wasp Communities Two Decades Post-Fire
… seasonality. Disturbances like wildfire affect bee and wasp communities, but recent meta-analyses are conflicted about whether fire harms or benefits insect pollinators. We investigated the lasting effects of wildfire burn severity on wild bee communities and floral resource availability across …
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Effects of burn season on bee and floral community in tallgrass prairies, and the use of museum collections data
… (growing season). Prairies are rich in diverse bee taxa, including many solitary and social species. It is unknown if dormant season or growing season burns differentially affects the following year’s bee community and their resources. Chapter 1 addresses the question of how fires affect bees in …
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Death by a thousand cuts: the role of pesticides, predators, and habitat patch characteristics on wild bee and insect communities
… and economically important taxa such as bees. This dissertation aims to address how habitat degradation in the form of pesticide pollution and altered trophic interactions impact bee biology and how patch physical characteristics affect the persistence and movement of beetles (Order: …
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BEES IN THE WOODS: SPRING ORCHARD POLLINATORS USE FOREST CANOPY POLLEN
There are over 4,000 wild bee species native to the United states, and over 420 in New York State; many are in decline due to combined pressures of habitat loss, pesticides, and pathogens. Despite many habitat restoration efforts focused on meadows and wildflower strips, the Northeastern United …
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An Assessment of Non-Apis Bees as Fruit and Vegetable Crop Pollinators in Southwest Virginia
… around the globe, notably the loss of honey bees (Apis mellifera L.) to Colony Collapse Disorder, coupled with a dearth of quantitative data on non-Apis bee pollinators, led to this dissertation research, which documents the role of non-Apis bees in crop pollination in southwest Virginia. …
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Bee diversity in Angola and community change along an altitudinal gradient at Serra da Chela (Bruco)
Insects, including wild bees (Hymenoptera: Anthophila) are exceptional model organisms to assess the effect of climate variation on species richness along altitudinal gradients. Climate variables and weather conditions are of extreme importance for insects particularly since their capacity of body …
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Wild bee responses to land use change: investigating the role of bee body size
… to sustain species and populations. Wild bees (Hymenoptera: Apoidea) are essential pollinators for many wild and cultivated flowering plants, and exhibit marked differences in life history traits. The consequences of land use change may therefore affect wild bees differently, but this …
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BEES AND WASPS IN A CHANGING ENVIRONMENT: MULTIPLE RESPONSES TO ANTHROPISED LANDSCAPES
Bees and predatory wasps provide highly relevant ecosystem services, the former being the main pollinator group and the latter regulating arthropod populations. Anthropisation, the way in which human activities shape natural ecosystems, threatens these insects from the community to the individual …
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BEES, HONEY AND TERRITORY: A COMPLEX NETWORK OF INTERACTIONS BETWEEN LANDSCAPE, BEEKEEPING AND HONEY QUALITY
… ecological, economic and cultural perspectives, bees are among the most important groups of insects. This is due to their central role in pollination pro-cesses and the production of numerous hive products. The genus Apis and the tribe Meliponini, which includes stingless bees, are fundamental …