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 249 for “"Herbivory"”.
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Effects of Herbivory on Plant and Insect Growth
… explain reductions in photosynthesis that follow herbivory. Finally, the carbohydrate content of high starch foliage was similar to that of elevated CO2 foliage and appears to stimulate compensatory feeding. Plant responses to herbivory are complex and spatially distinct. The relationship between …
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Studies of herbivory and vegetation change in Karoo shrublands
… and introduced herbivores and the effects of herbivory, competition and rainfall on plant reproduction and recruitment. The results of these investigations are presented as 14 papers. The first three papers interpret plant morphology and biogeography to provide information on past spatial and …
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The effects of herbivory, competition, and disturbance on island meadows
… predators and landscape change and I asked how herbivory and invasion might interact to cause declines of native species. In Garry oak meadows, Canada’s most endangered ecosystem, native forbs have declined relative to non-native grasses and I tested the facilitatory role of herbivory in that …
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The adaptive potential of plant endopolyploidy in response to herbivory
… (flower, fruit, and/or seed yield) following herbivory. Studies by Paige and Whitham (1987) showed that when ungulate herbivores removed 95% or more of the above-ground biomass of the monocarpic biennial scarlet gilia, Ipomopsis aggregata, the product of lifetime seed production, seed …
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Linking plant traits and herbivory in grassland biodiversity-ecosystem functioning research
… high niche overlap, regardless of intensity of herbivory by grasshoppers or sheep. This result indicates that environmental filtering structures these communities more than limiting similarity. Extending the use of traits beyond the study system in Inner Mongolia, I test the how both functional …
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Impact of elevated carbon dioxide and increased temperature on Japanese beetle herbivory
… how the major elements of global change affect herbivory in agroecosystems, a multi-factorial experiment was conducted in which soybeans were grown at two levels of carbon dioxide and temperature, including those predicted for 2050, under otherwise normal field conditions. Japanese beetles …
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The importance of being connected : induced resistance to herbivory in Trifolium repens networks
Contains fulltext : 72483.pdf (Publisher’s version ) (Open Access)
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Effects of Local Plant Neighborhood on Plant Herbivory in Perennial Polyculture Cropping Systems
… of development as a perennial grain crop. Insect herbivory was examined in the context of prairies. Local neighborhood grass cover strongly influenced insect herbivore foliar feeding; greater grass cover within the plant neighborhood resulted in lesser foliar herbivory. Our results suggest that …
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The Evolutionary Ecology of Arabidopsis Thaliana: Genotypic Diversity, Herbivory, and Elevated Carbon Dioxide
… evaluated the impact of elevated CO2 and insect herbivory on the genotypic response of Arabidopsis thaliana . I performed greenhouse and field experiments to examine plant ecological traits related to life history, fitness, and resistance and their variation under different abiotic and biotic …
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Overcompensation of Ipomopsis aggregata following ungulate herbivory: getting to the root of it
… demonstrating enhanced fitness following herbivory, i.e., plants overcompensate. The mechanistic underpinnings of overcompensation, however, are unclear. For example, it has been assumed that plants growing in high resource conditions are best able to compensate for herbivory. However, …
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Interactions between habitat and ungulate herbivory limit the spread of Ipomopsis aggregata (polemoniaceae)
… effects of habitat quality and ungulate herbivory on the fitness of a monocarpic wildflower, scarlet gilia (Ipomopsis aggregata) to further elucidate reasons for its absence in nutrient rich montane meadows in Flagstaff, AZ. Scarlet gilia is commonly found on slopes with disturbed and …
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Wild teosinte and cultivated maize show differential tolerance to flooding and herbivory stress
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-05-01
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Unravelling multidimensions of the flora of Kenya floristics, herbivory defences, and phylogenetic diversity
The wealth of plants in the vegetation of Kenya, owing to the country's wide range of climatic and ecological regions, can be complex and hence defies easy definition. This thesis, consisting of a literature review, four data chapters and a synthesis, addresses multiple aspects of that vegetation, …
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An investigation into the rapidly induced chemical responses of Myrica gale to insect herbivory
The effect of natural herbivory on the secondary metabolism of Myrica gale was investigated. In a field experiment herbivory was found to elicit changes in both the leaf phenolics and the density of volatile oil glands. Lygocoris spinolai, a capsid bug, accounted for most of the observed herbivory. …
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Foliar Herbivory on Understory Oaks as a Function of Forest Type and Prescribed Burning
Loss of oak seedling and sapling leaf area to insect herbivores has not been well characterized in Ozark forests, but may be a critical variable affecting current and future forest health. This study quantified loss of oak seedling and sapling leaf area to insect herbivores in recently burned or …
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The interactive effects of fire and herbivory on understorey vegetation and its dependent fauna
… and small vertebrates. I found that fire and herbivory interacted strongly to affect vegetation, with herbivory limiting the recovery of vegetation from fire. In contrast to the vegetation response, small vertebrates responded to the individual, but not interactive effects of disturbance. I …
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The interactive effects of fire and herbivory on understorey vegetation and its dependent fauna
… and small vertebrates. I found that fire and herbivory interacted strongly to affect vegetation, with herbivory limiting the recovery of vegetation from fire. In contrast to the vegetation response, small vertebrates responded to the individual, but not interactive effects of disturbance. I …
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A Community's Natural Resistance to Invasion by Cheatgrass and the Effects of Associational Herbivory
… of invasion biology with that of associational herbivory, I found that (1) cheatgrass was a highly utilized food source for generalist grasshoppers, (2) among native plant species, the amount of herbivory corresponded with their total percent nitrogen and other plant traits, and (3) a native …
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