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 18 of 18 for “"arthropod community"”.
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Ground-Dwelling Arthropod Community Structure of Saskatchewan's Agroecosystems and Seeded Grasslands
Ground-dwelling arthropods hold a critical role in maintaining the health and function of agroecosystems in the Canadian prairie landscape. However, the distribution of many groups is often limited to non-crop habitats, such as roadside ditches or distantly spaced grassland refuges. The high …
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Tree functional diversity affects litter decomposition and arthropod community composition in a tropical forest
… functional diversity of litter species and arthropod communities on litter decomposition and soil carbon dynamics in a semi-deciduous lowland tropical forest in Panama. I used size-based arthropod exclusions and different litter mixtures in experimental mesocosms in a 60-year-old secondary …
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The Cattle Dung Arthropod Community in Eastern South Dakota: Their Colonization, Impact on Degradation, and Response to Rangeland Management
… have ecological consequences, primarily to the arthropod community that inhabits cattle dung pats. This diverse community works together to recycle dung pats and make the nutrients in dung accessible to the surrounding plant community, an essential role in the functionality of rangelands. The …
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Arthropod assemblages on longleaf pines: a possible link between the red-cockaded woodpecker and groundcover vegetation
Little is known about arthropod communities inhabiting longleaf pines in the southeastern United States. This information is of particular importance because arthropods serve as the food base for the federally endangered red-cockaded woodpecker (RCW). In a recent study, this arthropod community has …
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The influence of native plants on arthropod population dynamics: can native plants enhance conservation biological control
… population and attract and sustain a diverse community of natural enemies relative to landscapes composed of alien plants. Native and alien landscapes were created to test this prediction. I compared the colonizing arthropod communities, herbivore survival and the aesthetic injury of trees and …
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The red imported fire ant, Solenopsis invicta, in early-successional coastal plain forests: tests of distribution and interaction strength
… and predatory effects on the existing arthropod community. In upland coastal plain pine forests at the Savannah River Site in South Carolina, I conducted two studies of fire ant ecology. In my first study (chapter 1), I investigated the way in which fire ants colonize early-successional …
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ΜΕΛΕΤΗ ΤΗΣ ΣΤΡΩΜΝΗΣ, ΤΗΣ ΑΠΟΣΥΝΘΕΣΗΣ ΚΑΙ ΤΗΣ ΚΟΙΝΟΤΗΤΑΣ ΤΩΝ ΑΡΘΡΟΠΟΔΩΝ ΣΕ ΟΙΚΟΣΥΣΤΗΜΑΤΑ ΧΑΛΕΠΕΙΟΥ ΠΕΥΚΗΣ ΤΗΣ ΝΗΣΙΩΤΙΚΗΣ ΕΛΛΑΔΑΣ
… CHARACTERISTICS: 1. THE STRUCTURE OF PLANT COMMUNITY 2. THE PHENOLOGY AND THE QUANTITY OF LITTER FALL 3. THE RATE OF DECOMPOSITION OF ORGANIC MATTER IN THE FOREST FLOOR AND4. THE TEMPORAL AND SPATIAL STRUCTURE OF THE ARTHROPOD COMMUNITY. THIS TYPE OFAPPROACH IS REALIZED FOR THE FIRST TIME IN …
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Drivers of plant and arthropod diversity and community structure in a grassland ecosystem
… are known to influence species coexistence and community organization, although the relative importance of these forces is debated. While niche-based models emphasize the effect of local processes on community structure, regional species pools and dispersal abilities of organisms are also …
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Competition and Community Interactions of Two Generalist Herbivores
… and ecosystem engineering effects at the community level. I studied competition and community interactions of two temporally-separated species of herbivorous insects, western tent caterpillars (<em>Malacosoma californicum</em>) and fall webworms (<em>Hyphantria cunea</em>) on their shared …
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Urbanization affects environmental conditions for developing songbirds
… I investigated how urbanization changes the arthropod community, how that in turn affects nestling diet, and ultimately if there were any differences in nestling amino acid profiles or body condition between habitat types. Prior work found that urban habitats also have far higher rates of …
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The biological control of the red clover casebearer in New Zealand : A thesis submitted in partial fulfilment of the requirements for the Degree of Doctor of Philosophy at Lincoln University
… to yield reductions. This thesis explores the arthropod community of red clover seed crops under a main theme of ‘the biocontrol of the red clover casebearer’. The experiments employed are varied, although typically with a major aim being exploring the function of species within the red clover …
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Patterns of arthropod distribution and determinants of arthropod assemblage composition in a natural West African savannah
This study investigated patterns of arthropod community organisation and the processes structuring these communities on a range of different tree species in a natural West African savannah (Comoé National Park, Côte d'Ivoire). It described and analysed patterns of arthropod distribution on the …
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Effects of Plant Invasions on Birds Breeding In Desert Grasslands
… richness, density, habitat selection, and arthropod prey of breeding birds between 2013 and 2015. Encroachment by woody plants influenced breeding birds strongly, with distributions and densities of most grassland obligates decreasing sharply as woody cover increased. As encroachment by …
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Ecological Perspectives on Cannabis sativa Phytochemistry: Biotic Interactions and Abiotic Stress in Managed and Natural Systems
… about how variation in phytochemistry influences arthropod interactions, or how these interactions differ across environmental conditions and cultivation systems. This dissertation takes an ecological lens to Cannabis phytochemistry, combining observational surveys, comparative analyses, and field …
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Flame and fodder: how fire and grazing shape arthropod communities in the Okavango Delta
… of these services underpinned by invertebrates, arthropods in particular. Although the aquatic invertebrates are relatively well-studied, the terrestrial arthropods have received less attention, while undoubtedly also providing critical regulatory services on the islands within the Delta, and …
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Belowground impacts of regenerative agriculture in a South African seed production system
… rotation. To determine the changes in soil fauna community assemblages and species richness, two components of the belowground fauna were investigated. Firstly, arthropod diversity indices were compared between conventional agriculture and regenerative agriculture management strategies (Chapter …
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How vertebrate communities affect quality and yield of macadamia farms in Levubu, South Africa
… as ecosystem service providers as well as the arthropod community, which can provide both services (pollination, biocontrol) as well as disservices (crop damage). The macadamia industry is highly profitable and plantings are expanding worldwide. South Africa is currently the largest macadamia …