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 197 for “"Pollinator"”.
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Petals, pigments and pollinator preferences
… not always possible), large-scale increase of pollinator numbers (possible but involving significant input or change over large areas), or the production of new cultivars which are more attractive to insects and which provide them with more or better nectar and pollen rewards for visiting (the …
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Neglected pollinator syndromes in seasonally inundated Renosterveld
… Darling in the Western Cape, to determine their pollinator syndromes, and to evaluate the relative importance of monkey beetles (Scarabaeidae: Rutelinae: Hopliini) and relatively short-tongued horseflies (Tabanidae) in their pollination. Detailed observations showed that all the plants …
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Pollinator Abundance at Solar Farms in Alberta, Canada
… landscape could function as sources of essential pollinator habitat to support pollinator abundance. Some solar farms opt for a vegetated substrate beneath solar panels and target mowing to beneath panels. Edges of solar sites experience less frequent vegetation control which could create an edge …
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Biotic and Abiotic Drivers of Plant-Pollinator Interaction Rewiring
… this dissertation, I examine variation in plant-pollinator interaction patterns. I present two observational studies exploring drivers of interaction variation, followed by an experiment in which I demonstrate the effect of changing plant-pollinator interactions. First, I use a structural …
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The influence of linear landscape features on pollinator behaviour
… both natural and artificial linear features on pollinator behaviour at medium and landscape scales. Observations along 30m transects, perpendicular to eight different hedgerows revealed that non-foraging pollinators were far more likely to exhibit linear flight next to the hedgerow than they …
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Pollinator Movement and Pollen Transfer in Hybrid Seed Canola
… (‘female’) plants, facilitated by managed pollinators (honey and leafcutter bees) and wild pollinators. I assessed pollinators in fields of hybrid seed canola located in Southern Alberta to determine what behaviours and conditions could enhance pollen transfer between male and female …
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Effects of Cucumber Mosaic Virus on Plant-Pollinator Relationships
… terrestris). Bumblebees are important tomato pollinators but do not transmit CMV. For wild plants under natural conditions, helping host reproduction by encouraging bee visitation, pollination and increased host reproduction might represent a payback by the virus to susceptible hosts. …
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Petal cell shape and flower-pollinator interaction in Nicotiana
… epidermal cells may increase grip for insect pollinators and enhance flower colouration compared to non-conical cells. Nicotiana (Solanaceae) presents a diverse range of petal cell shapes. Interestingly, sister species in at least two phylogenetically distinct clades of the genus have …
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Effects of plant viral pathogens on plant-pollinator relationships
… host plants that render them more attractive to pollinators. This builds on previous work, which showed that in tomato Cucumber mosaic virus (CMV) infection enhanced emission of volatile organic compounds (VOCs) that attracted bumblebees and enhanced pollination of infected plants. To test if …
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Ornamental Plants Impact Insect Pollinator Abundance and Diversity in Gardens
As pollinator populations decline globally, public interest in creating pollinator gardens to help sustain bee abundance and diversity is rising, and there are many lists of recommended pollinator plantings and suggestions for bee-friendly flowers. However, these suggestions often lack grounding in …
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Multiple dimensions of floral rewards drive pollinator behavior and pollen movement
… little is known about how this variation impacts pollinator behavior and plant fitness. Additionally, plants that rely on bees for pollination face a challenge: attracting pollinators while minimizing pollen consumption. Bees provision larvae with pollen, and pollen consumption can reduce male …
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Pollinator conservation and access to pollinators on an urban-rural gradient
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-15 without embargo terms
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Factors Associated with Pollinator Foraging and Floral Morphology of Lawn Weeds
The decline in pollinator populations poses a significant challenge to global food security, necessitating best management practices that minimize pollinator exposure to harmful pesticides. Many common weeds in managed turfgrass systems attract honey bees (Apis mellifera L.) and other pollinators, …
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Consequences of plant population size for pollinator visitation and plant reproductive success
… size of plant populations, and can affect plant-pollinator interactions. It is hypothesized that in small plant populations the ability 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 …
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Developing remote sensing approaches for integrated pest and pollinator management in turfgrass
… is an integral part of an integrated pest and pollinator management (IPPM) plan. Virginia golf courses are currently using remote sensing and light reflectance to detect non-insect pests in turfgrass. This thesis aims to develop remote sensing and light reflectance methods to aid in a turfgrass …
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Pollinator behaviour and the evolutionary genetics of petal surface texture in the Solanaceae
… trait across the angiosperms, and influence pollinator behaviour and pollination success. This work explores two key aspects of conical cell evolution: firstly, why conical cells are so prevalent across many diverse species, and secondly, why some species have lost conical petal cells. Using …
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Pollinator-syndrome driven changes in the mating systems of two Cape legume species
… mating systems to accommodate their respective pollinators lies in finding a pair of closely related species differing only in pollination syndromes. Furthermore, it has been hypothesized that Non-Flying Mammal Pollination (NFMP) arises from a bird pollinated ancestor as a result of their …
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Factors influencing populations of the fig pollinator (Liporrhopalum tentacularis) and its parasitoid (Sycoscapter sp.)
… of the dioecious fig Ficus montana, its pollinator Liporrhopalum tentacularis and the non-pollinating fig wasp Sycoscapter sp. E montana grows naturally in soils of varying nutrient quality. Under experimental conditions, with enhanced soil nutrition, both female and male plants responded …
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