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.
Results
Showing 1 to 15 of 15 for “"Species dynamics"”.
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Lineage-level within-species dynamics in the human facial skin microbiome
Multiple lineages of a bacterial species can coexist in a community. These extremely closely-related clades originate from the recent immigration of individual cells, whose evolution over short timescales (years) results in minute genomic diversity (101 SNPs/genome). Each has distinct origins, and …
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Blood host preferences and competitive inter-species dynamics within an African malaria vector species complex inferred from signs of animal activity around aquatic larval habitats distributed across a gradient of fully domesticated to fully pristine ecosystems in southern Tanzania
… available, it is the predominant member sibling species of the Anopheles gambiae complex. However, little is known about its population dynamics or blood utilization behaviours in pristine natural ecosystems, where these known preferred hosts are scarce or completely absent. This study …
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INTERANNUAL VARIABILITY IN MORPHOMETRIC CONDITION OF LARVAL FISH AS A FUNCTION OF ENVIRONMENTAL VARIABLES IN BEAUFORT, NC
… abundance and recruitment for many fisheries species. By studying how environmental factors affect larval fish condition, we may be able to better anticipate when a high or low recruitment year occurs since condition affects larval fish growth and survival. This project aims to expand our …
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Using time-resolved nuclear diagnostics to probe kinetic/multi-ion physics and shock dynamics on OMEGA and the NIF
… PXTD, time-resolved observations of fuel-ion species dynamics in ICF implosions have been made using multiple nuclear reaction histories. These time-resolved measurements have also been extended to infer ion and electron temperature histories in ICF implosions. On the National Ignition …
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Akrotiri Aetokremnos and the Cypriot Pygmy Hippopotamus: An Interdisciplinary Look at a Late Pleistocene Large Mammal Extinction
… extinction event. The last appearance of this species is at the archaeological site Akrotiri Aetokremnos (~12,000 cal. B.P.), the oldest well-dated site on Cyprus. This dissertation represents interdisciplinary analyses surrounding the faunal remains of the Cypriot pygmy hippopotamus at this …
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Ecology of the infauna of Spurn Bight mudflats : an area proposed for reclamation
… followed by a year long intensive study of the dynamics of the major species.Two-way cluster analysis of species and sample stations revealed three subcommunities within a, 'classic' boreal shallow mud 'Macoma' community distributed in relation mainly to sediment type and position on the shore. …
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The Role of Intraspecific Variation, Species Interactions, and Eco-evolutionary Feedbacks in Population Persistence
… on similar timescales with each influencing the dynamics of one another through eco-evolutionary feedbacks. Eco-evolutionary feedbacks have been investigated with respect to population and species persistence, especially in small populations. However, the role of some evolutionary processes, such …
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Impacts of oak-focused silvicultural treatments on the regeneration layer nine years post-treatment in the southern Appalachian Mountains of North Carolina
… of fire and subsequent canopy closure, mesic species have proliferated, frequently forming a dense understory, inhibiting oak regeneration success. This study was developed to determine species dynamics between oak and oak competitors in response to silvicultural treatments in the southern …
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Vegetation ecology of springs: ecological, spatial and temporal patterns
… precondition for the identification of indicator species. The complexity of ecosystems and ecological processes hampers this quest oftentimes. Springs provide a natural setting that minimises such constraints. Compared to other habitat types, external factors are less relevant, which makes it …
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Demographic processes determining the range dynamics of plant species, and their consequences for biodiversity maintenance in the face of environmental change
… thesis aims to introduce process-based model for species range dynamics that can be fitted to abundance data. For this purpose, the well-studied Proteaceae species of the South African Cape Floristic Region (CFR) offer a great data set to fit process-based models. These species are subject to …
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Molecular docking and geographical information systems as tools to assess the potential impact of veterinary medicines on non-target organisms and the environment
… predict the chronic impact of VMs on different species of aquatic organisms were also investigated. The Scottish Environmental Protection Agency (SEPA) provided information on the use of five sea lice treatments from 2008-2011 on Scottish salmon farms. This information was combined with the …
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Reconstructing Past Population Dynamics and Movements from Genomic and Environmental Data
… methods to reconstruct the past of different species with various data availability, and to answer the ecological questions behind those. Ancient genomics has been a powerhouse for human history studies, but the expanding size and complexity of datasets have become major challenges for …
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Wachstumsraten, Wachstumsmuster und Wachstumsstörungen tropischer Bäume: Analyse von Langzeiteffekten und kurzfristigen Störungen mit Hilfe von Jahrringstudien
… on understanding some aspects of tropical forest dynamics and ecology. In species that produce annual tree rings, tree-ring analysis allows the most precise estimate of these two parameters. The present study assessed the age and radial growth rate of three Hymenaea species inhabiting four of the …
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Rate-induced tipping in a moving habitat
… extinction? This thesis addresses the problem of species adapting to shifting habitats, using the framework of ``critical transitions'' or ``tipping points''. Specifically, it explores the persistence of a single species in a fast-moving habitat, and how the nature of its population growth affects …