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 131 for “"species interactions"”.
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Impact of Light Pollution on Species Interactions
… on the impact of light pollution on individual species. Therefore, I investigated the impact of light pollution on species interactions. I determined whether light pollution is a mechanism of community change, evaluated whether there were changes in species interactions between predators and …
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Biotic and abiotic mechanisms shaping multi-species interactions
Interactions are important drivers of selection and community structure, which makes the study of multi-species interactions critical for understanding the ecology and evolution of organisms. This dissertation includes four data chapters that examine the biotic and abiotic mechanisms that shape …
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Tipping points, regime shifts and species interactions within shallow marine ecosystems
… long-term pressures, such as addition of grazing species, may be important in shifting intertidal communities from early successional states to more complex, and potentially more resilient, systems.
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Hydrogel confinement systems for evaluating dynamic intra-and inter- species interactions
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-05-01
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The Role of Intraspecific Variation, Species Interactions, and Eco-evolutionary Feedbacks in Population Persistence
… been investigated with respect to population and species persistence, especially in small populations. However, the role of some evolutionary processes, such as balancing selection mechanisms, in the persistence of small populations remains unclear. Furthermore, recent studies have shown that …
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Productivity, Carbon Sequestration, Nutrient Accumulation, And Species Interactions In Perennial Biomass Alley Cropping Systems
… However, little is known about appropriate species combinations and production potential for biomass crops in agroforestry systems. Our objectives were to evaluate the potential for biomass feedstock production, nutrient uptake and accumulation, and carbon sequestration in alley cropping …
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The Social Cognition of Domestic Dogs (Canis familiaris) During Cross-Species Interactions with Humans
… an impressive cognitive skillset within the species; however, little research is conducted in naturalistic settings. Thus, much of what is currently known about dog cognition comes from laboratory trials. This thesis explores the dog cognitive skillset, investigating their social cognition …
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Characterizing the Role of the Type VI Secretion System in Interbacterial Species Interactions and Pathogenesis
… incomplete understanding of how T6SS expressing species can co-exist and the implications of antagonistic responses in shaping polymicrobial communities. Further, these species are often subject to a changing environment and yet, the role of environmental signals and their influence on …
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Loss of LasR function reshapes inter-species interactions in a polymicrobial cystic fibrosis airway model
… polymicrobial infections. We now know that the interactions between co-habiting Gram-negative, Gram-positive, and fungal species can significantly impact the outcomes of these airway infections. Factors like intra-species genetic variation and (potentially existential) environmental challenges …
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Host-Parasite Interactions Within Food Webs
… known to extend beyond the host to affect other species interactions. I used a series of approaches to gain a more integral understanding of host-parasite interactions by studying (1) the effects of parasites on biotic interactions that hosts engage in, (2) how biotic interactions such as …
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Ocean Acidification and Seasonal Temperatures Counter Positive Novel Species Interaction and Warming Effects on Tropicalising Temperate Fish Communities
… warming has facilitated the redistribution of species globally. Many tropical species have shifted their ranges poleward either to escape thermally unsuitable conditions or to invade previously inaccessible temperate environments. Climate-driven species redistributions have facilitated …
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Bat Habitat Ecology Using Remote Acoustical Detectors at the Army National Guard Maneuver Training Center - Fort Pickett, Blackstone, Virginia
… and population-level data, and understanding species interactions is especially important in changing landscapes and for species whose populations levels are threatened by outside factors of anthropomorphic disturbance from hibernacular visitation to energy production and fungal pathogens. For …
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Development of an experimental model to investigate the community dynamics of selected saprotrophic wood decomposer fungi from the frigate unicorn
… the community dynamics of two- and three-fungal species interactions is described. The microcosm consists of tessellated nutrient agar tiles allowing the varied prescription of: (1) the number of interacting fungal species; (2) the spatial organisation (patchiness) of the distribution of …
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An ecological study of the breeding birds of grassland habitats within Illinois
… the influence of area, vegetation structure, species interactions, and habitat management on community structure. Fragment size was found to strongly influence breeding bird species richness within grasslands. Non-prairie bird species dominated small grasslands whereas prairie bird species …
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A quantitative model of density-dependent habitat selection: integrating isodar and isoleg theories
… selection, but few models address multiple species interactions and even fewer simulate these phenomena. Moreover, the development of quantitative models that incorporate multiple species interactions is in its infancy with existing models being mostly conceptual and limited in application. …
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The competitive dynamics of two Protea shrubs growing in a mixed fynbos stand
Patterns of segregation among Protea species were investigated. Interspecific competition was studied as a cause of these patterns. Two different methods were used for measuring competition in a mixed stand of P. lepidocarpodendron and P. corona/a growing on the Cape Peninsula. These were the …
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Distances Between Species in Food Webs: Evaluating Alternative Metrics' Predictive Power
… systems makes it difficult to predict how one species will react to the disturbance of another. Complex systems of species’ interactions can be described as ecological networks. One way in which ecological networks can give information concerning one species’ response to the perturbation of …
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Consequences of interaction between the native ant community and an invasive plant (Euphorbia esula)
Mutualisms, or mutually beneficial species interactions (+/+), play a key role in ecological community functioning, influencing community stability and biological diversity. Despite their importance in ecological processes, the study of mutualism has limitations. First, seemingly positive …
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Network generation and analysis for the investigation of host-pathogen interactions in tuberculosis Holifidy Arisoa Rapanoel.
This project aims to predict protein interactions between human and Mtb. The interologs method based on experimentally verified intra-species and inter-species interactions was used to predict human-Mtb protein interactions. They were further filtered using known host-pathogen interactions and …
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Climate change impacts on macro and micro scale interactions between a tropical herbivore and temperate kelp forests
… stressors not only directly affect individual species but also indirectly impact ecosystem structure and function by altering species interactions. Changes to species interactions are partly driven by shifts in species distributions. For example, warming and strengthened currents are …
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