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 62 for “"Plant interactions"”.
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Modeling Inter-plant Interactions
The purpose of this paper is to examine the interactions between two plant species endemic to Florida and develop a model for the growth of one of the plant species. An equation for the growth of Hypericum cumulicola is developed through analyzing how the distance to and the height of the nearest …
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Swan-plant interactions in a chalk river catchment.
Plants are of fundamental importance to the structure, functioning and service provision of many ecosystems. However, herbivores can have negative ecological and socioeconomic effects on plant communities through consumption, trampling and alteration of nutrient cycles. In this thesis I address a …
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The effect of aphids in parasitoid-caterpillar-plant interactions
… considered only within the context of pairwise interactions even though a species' distribution and abundance may be determined by interactions with many species within and between trophic levels. Multiple herbivores often share the same host and may interact indirectly by altering the …
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Pyrolysis Processing and Feedstock Impact on Biochar Soil-Plant Interactions
… frigid Typic Eutrudepts), 2. germination of four plant species (corn, soybean (Glycine max), alfalfa (Medicago sativa), wild sunflower (Helianthus annuus)), and 3. phenotypic characteristics of inoculated (Rhizobium) and non-incoculated Medicago truncatula (barrel clover) genotypes “wild” and …
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The dynamics of molecular components that regulate aphid-plant interactions
… losses of crop yield, through draining plant resources and vectoring over 275 plant viruses. In plant-pathogen interactions, basal plant defense involving pathogen associated molecular pattern (PAMP) triggered immunity (PTI) and effector triggered immunity (ETI) effectively fends off the …
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Understanding How Whole Genome Duplication in Plants Impacts Herbivore-plant Interactions
… force in many communities. Although herbivore-plant interactions have been a focus of interest for decades, we are still exploring how large-scale genetic changes in the host plant alters their interactions with insect herbivores. One such prevalent change in plants is whole-genome duplication …
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Exploring host-parasitic plant interactions by examining mechanisms of resistance and susceptibility
Parasitic plants extract water and nutrients from host plants by using specialized structures called haustoria. These interactions can cause 100% crop losses, yet growers lack control options that are effective and affordable. Host crops with resistance to parasitism would be an ideal solution to …
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Geochemical Investigations of Mineral Weathering: Quantifying Weathering Intensity, Silicate versus Carbonate Contributions, and Soil-Plant Interactions
… to its dissolution and eventual uptake into plants or precipitation as carbonate minerals. The three papers examine the rate and character of carbonate and silicate mineral weathering over a wide range of climatic and tectonic regimes, time periods, and lithologies, and focus on very …
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Positive and negative dynamics of plant-plant interactions along environmental gradients: Effects at individual and community level
Ergebnisse großer Grünland-Biodiversitätsexperimente legen einen positiven Zusammenhang zwischen Artenvielfalt und Ökosystemfunktionen (z.B. Produktivität, Ressourcennutzung, Stabilität der Gemeinschaften) nahe. Der durch Klima- und Landnutzungswandel andauernde Artenverlust bedroht die …
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Primate-Plant Interactions in the Tropical Dry Forests of Northwestern Madagascar: Seed Dispersal and Sensory Ecology of Eulemur fulvus.
Fruiting plants and frugivores are involved in a complex set of interactions. Frugivores rely on fruiting plants as critical food resources, while fruiting plants rely on frugivores for seed dispersal services. Here, I measure the interrelatedness of brown lemurs (Eulemur fulvus) and the endemic …
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Human-Plant Interactions in Semi-Arid Regions: An Archaeobotanical Study of the Iron Age Site of Mtanye, Southwestern Zimbabwe
Humans have always interacted with plants for thousands of years ago. The origin of plant domestication is a clear example of human-plant mutualism. This mutual relationship has gradually developed into a co-entangled relationship where both symbionts benefit each other in an environment. The …
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Resource dynamics and positive and negative interactions between plants in arid systems / Jane Prider.
Proposes that the overall outcome of plant interactions along a temporal gradient of resource availability changes from positive during interpulses to negative during pulses. Examines negative interactions between 4 co-dominant chenopod scrubs in arid Acacia papyrocarpa woodlands. Negative …
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AY-‐WB phytoplasma manipulations of host and non-‐host leafhopper interactions
Hempitera. In plant hosts, phytoplasmas induce physiological changes and in both hosts modulate plant-‐insect interactions. Previously, interactions have been examined with both hosts infected with phytoplasmas. Thus, it is unclear which organism the effect stems from or how phytoplasmas …
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Ethnobotany of Namaqualand : the Richtersveld
… to provide a biobehavioural focus for indigenous plant use in the semi-arid areas of one of the six so-called Coloured Rural Reserves (Komaggas, Concordia, Richtersveld, Steinkopf, Leliefontein and Pella) in the north-western Cape (Namaqualand). Although much of the indigenous plant lore has been …
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Niche construction and plant-use in the Mesolithic
In Britain and north-west Europe, the human-plant interactions of Mesolithic hunter-gatherers have been the focus of debate and study for nearly 60 years. The archaeobotanical and pollen records from these regions suggest that Mesolithic people actively constructed their own niches through the use …
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Patterns of arthropod distribution and determinants of arthropod assemblage composition in a natural West African savannah
… communities, on the level of multiple-species interactions, and on the level of individual insect species. Community samples were obtained by applying (i) canopy fogging for mature individuals of three tree species (Anogeissus leiocarpa, Burkea africana, Crossopteryx febrifuga) and (ii) a …
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Factors Influencing Sugar Feeding in Invasive Mosquitoes
Phytophagy (i.e., feeding on plant-derived materials) is an essential component of mosquito biology. Yet, it has been historically neglected as most research effort has been concentrated on host-seeking behavior and pathogen transmission. As mosquitoes are the deadliest animals on earth and because …
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