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 11 of 11 for “"Tritrophic"”.
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Genetic Analysis of Tritrophic Interactions between Entompathogenic Nematodes, Symbiotic Bacteria and Blood – Sucking Flies.
Mosquitoes are responsible for millions of deaths a year through the viruses and parasites they vector. Many of these vector species have successfully expanded their range into temperate climates due to a combination of climate change and the easy movement of goods and people around the world. The …
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The application of novel mass spectrometric techniques for the analysis of volatile organic compounds in different environments
… and locate their prey. This process is termed tritrophic signalling. Ozone will readily react with any bVOCs containing an alkene functional group, and as many alkenes (primarily monoterpenes and sesquiterpenes) have been shown to play a significant role in tritrophic signalling it was …
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Interaction of tomato plants infected by the nematode Meloidogyne javanica on aboveground herbivore Tetranychus urticae and on behaviour of its predator Phytoseiulus macropilis
Tritrophic interactions play an important role in the dynamics of arthropods with their hosts. By inducing defenses, plants respond to herbivore attacks, may affect your development. The general objective of this research was to investigate the effect of the nematode Meloidogyne javanica on the …
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Interactions between nematodes, potato and soil-borne micro-organisms and their effect on the management of potato cyst nematodes
… were set up to further elucidate the complex tritrophic PCNpotato-soil bacteria relationship. Bacterial strains isolated from the sugar beet rhizosphere were shown to be hatch active towards Globodera pallida and to be capable of successfully colonising the sugar beet rhizosphere when applied …
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Host-Parasitoid Interactions of Two Invasive Drosophilids in Virginia Fruit Crops
… management option. Olfactometry results indicate tritrophic selectivity by Drosophila parasitoids, suggesting multiple parasitoids could be required for effective biological control.
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Effects of Plant Damage, Herbivore-Associated Cues, and Learning on Foraging Behavior of a Parasitoid Wasp
… (Lepidoptera: Noctuidae) as a tritrophic model. Twenty-five cotton plants were arranged in a 5 m x 5 m array, five of which served as treatments that contained different combinations of wasp foraging cues (plant damage, host frass, and host larvae). These manipulated plants are …
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Ecological consequences of genetic variation in foraging behaviors of a predatory mite
… strategies in the evolution of prey-finding in a tritrophic system. High consumption, high conversion efficiency and high dispersal response phenotypes interacted differently with prey in a spatially complex landscape. All foraging traits were comparable in terms of predator-prey densities and …
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The red imported fire ant, Solenopsis invicta, in early-successional coastal plain forests: tests of distribution and interaction strength
… species in early-successional forest gaps. In a tritrophic system, I tested whether the top-down effect of insect herbivore consumption by fire ants was strong enough to cascade through two trophic levels and improve plant growth and fitness. I compared this potential effect to that of other …
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Insects in mountainous landscapes: Implications of landscape context and climate change
… more ecologically meaningful insights into tritrophic systems than testing individual hypotheses separately. Although both herbivores will find suitable habitats at their current upper range limit, T. obscura will likely lose some habitat patches at lower sites following suppression of V. …
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Effekte einer reduzierten Dosis von Pflanzenschutzmitteln auf tritrophische Systeme im Ackerbau
Chemische Pflanzenschutzmittel (PSM) bekämpfen nicht nur Schadorganismen, sondern haben aufgrund ihrer hohen Toxizität auch negative Auswirkungen auf Nicht-Ziel-Organismen. Die Fragestellung der Arbeit war es, ob mit reduzierten Anwendungen von PSM ihr Gefährdungspotenzial für Prädatoren von …