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 20 of 31 for “"Pollination Services"”.
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Bee Abundance Along a Tropical Montane Elevational Gradient and Implications for Crop Pollination Services
<p>Tropical forests are among the biologically richest ecosystems on Earth, but how most organisms in these forests will respond to a warming climate remains uncertain. Insects are expected to be highly responsive to climate change due to their short life cycles that are strongly influenced by …
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Responses of Arthropods to Fire and How Pollinators and Pollination Services Are Affected by Fire Severity
… communities which provide essential ecosystem services. Focusing on arthropods, fire can influence this ubiquitous animal group in various way. We performed a comprehensive meta-analysis evaluating how fires impact differing arthropod functional groups. We found that overall, fire negatively …
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Pollination in a changing world: function and resilience
… these same ecosystem functions. Animal-mediated pollination is critical for the functioning of natural and production systems, but is strongly affected by agriculture, largely due to impacts on wild pollinators that require natural habitat. However, although more biodiverse communities often …
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The effects of wildflower plots and diverse landscapes on ecosystem services, bee communities, and on-farm tick abundance
… are two commonly promoted tactics to enhance pollination services and biological control of crop pests, which are ecosystem services that can improve agricultural outputs. There are several programs at various levels of government in the United States that landowners can use to defray the …
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Social and ecological dimensions of supporting wild pollinators in tropical smallholder farms
… of the tropics. In these landscapes, ecosystem services provided by wild insects, such as pollination services, play an important role in sustaining food security and biodiversity conservation. However, much of the research on pollination services to date has been developed in simplified, …
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Apple orchards feed and contaminate bees during, but even more so after bloom
… Linn., provide vital economic and ecological services via pollination while concurrently facing multiple interconnected stressors impacting their health. Many crops like apples, peaches, and cherries that add diversity and nutrition to our diet are wholly or partially dependent upon the …
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The effects of urbanization on disease prevalence in managed honey bee hives in Hamilton County, TN
… As both urbanization and the demand for pollination services increase, it is vital to understand how honey bees will adapt to changing environments and pressures.
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The Importance Of Surface Mining As A Landscape Variable In Shaping Wild Bee Communities In Central Appalachian Forests
… 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 Kentucky, U.S.A. where surface mining for coal …
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Native Bees and Pollen Collection: How Flexible Are They?
… bee (Apis mellifera) are declining, threatening pollination services and thus the reproduction of crops and wild plants. Native bees may be a free source of pollination services and act as ‘insurance’ against potential honey bee losses in Australia. This study aims is to determine whether native …
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Native Bees and Pollen Collection: How Flexible Are They?
… bee (Apis mellifera) are declining, threatening pollination services and thus the reproduction of crops and wild plants. Native bees may be a free source of pollination services and act as ‘insurance’ against potential honey bee losses in Australia. This study aims is to determine whether native …
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Consequences of plant population size for pollinator visitation and plant reproductive success
… to set seeds can be reduced due to limited pollination services, since individuals in small populations can receive less quantity or quality of visits. In this study, I investigated the effect of population size on plant reproductive success and insect visitation in 8 populations of two …
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Sublethal Effects of Pesticides on Visually-Guided Bee Behaviours
… navigation, with significant implications for pollination services and pesticide risk assessments.
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The Effects of Pesticide Exposures on the Nutritional and Immune Health of the Honey Bee, Apis mellifera L.
… of managed bee colonies available for crop pollination services. Here, I report the effects of pesticide exposures on the nutritional and immune health of the honey bee. Total protein concentration was significantly reduced in the coumaphos- and chlorothalonil-treated individuals compared to …
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Naturally occurring resistance to Varroa destructor in the Western honey bee (Apis mellifera)
… can be regarded as a keystone organism. The pollination services bees provide are invaluable not only in terms of human health and food security, with an estimated worth of €153 billion to food production (Gallai et al., 2009), but also for the health of whole ecosystems (Hung et al., 2018). …
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Three essays on the idiosyncrasies of a perennial crop : the case of the US almond market
… short-run and -0.681 in the long run. Ecosystem Services (ESS) play a key role in providing necessary natural resource inputs into almond production in California. When ESS are threatened, it affects producer investment decisions and the longer-run supply responses of perennial crop producers. In …
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Plant virus detection and diversity in a mixed tree fruit orchard determined through metagenomic-based analysis of honeybee (Apis mellifera) collected samples
… these impacts through management practices. Pollination is an essential aspect of fruit production, and pollen can also be a major transmission route for plant viruses. Honeybees (Apis mellifera) collect pollen and nectar from multiple plant individuals, and commercial honeybee pollination …
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Essays on the economics of bee-friendly beef
… wild plants and agricultural crops rely on bee pollination services. Addressing this issue requires coordinated efforts from producers, retailers, and consumers to restore pollinator habitats. This study explores two key aspects of promoting bee-friendly beef as a potential solution to support …
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Israeli acute paralysis virus (IAPV) and deformed wing virus (DWV) infection progression in honey bees
… of colony failures, threatening the supply of pollination services in agriculture. However, understanding and modeling infection and transmission dynamics is hampered by gaps in knowledge about the timeline of virus infection, specifically how virus titers change post-exposure. Moreover, while …
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Amelioration of acute and chronic toxicity of imidacloprid by dietary phytochemicals in honey bees (apis mellifera)
Honey bees (Apis mellifera) provide important pollination services to the U.S. agricultural enterprise, valued at more than $15 billion per year. However, colonies have been declining due to multiple stressors, including parasites, pests, diseases, pesticides, nutrition, and modern beekeeping …
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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
… Bees nesting in these areas may in turn provide pollination to agricultural crops through a “spill-over” effect. This project has improved our understanding of native bee communities and the value of management practices that promote sustainable agricultural production through pollination …
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