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 102 for “"mutualism"”.
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On the ecological transitions between parasitism and mutualism
… the same pair of interacting species, lying on a mutualism-parasitism continuum. Identifying the underlying mechanisms and context dependency of such ecological dynamics is essential to understand the responses of interacting species to rapidly changing environments. In this thesis, I investigate …
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Architectural Mutualism: A Marriage of Old and New
The dialogue between old and new architecture is a conversation brought to the forefront of the conservationist movement and city planning efforts as cities expand to their physical limits and eco-friendly reuse options become mainstream. As designers try and achieve a mutual respect between …
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Ecological genomics of mutualism decline in nitrogen-fixing bacteria
Mutualisms, cooperative partnerships between species, are among the most prevalent and economically important biological interactions. The fitness benefits of mutualism are well-known to depend on the context in which the interaction occurs, and recent evidence supports the hypothesis that …
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Cooperation, ecology and behaviour in the honeyguide-human mutualism
… and ecological aspects of the human-honeyguide mutualism, a unique interspecies interaction in which greater honeyguides (Indicator indicator) cooperate with humans by guiding them to wild bees' nests. This mutualism enables each species to obtain a high-calorie, preferred food: wax for …
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Host use, mutualism and parasitism in the Lycaeides butterfly complex
Changes in host use in herbivorous insects can lead to diversification, speciation, and changes in other ecological interactions. In the first chapter, larval performance was investigated in three species of Lycaeides butterflies and placed into the context of other already studied ecological …
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The Visual Ecology of the Cleaner Shrimp-Client Fish Mutualism
… partners. For the cleaner shrimp-client fish mutualism, it has been suggested that these signals are visual, and function to identify cleaners as helpers, rather than food, and perhaps to identify clients as seeking cleaning rather than a meal. </p><p>The broad goal of this dissertation was to …
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Is the distribution of Liparia determined by disturbance or mutualism?
… of L. parva was determined not by its mutualism, but by rocks as a buffer against disturbance.
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Exploiters and exploited: antagonism, mutualism and mimicry in an ecological community
Interactions between species shape the natural world, and range along a continuum from mutualistic (benefitting all parties) to antagonistic (harming at least one party). Typically, interacting species are studied in a pairwise manner, and such studies have yielded a wealth of insights. However, …
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An Experimental Test of Controls on Resource Exchange in an Ectomycorrhizal Mutualism
Models of resource exchange mutualisms utilize economic principles to explain how the costs and benefits of these interactions vary with environmental context. All of these models use a ratio of resource exchange (e.g., nitrogen: carbon) as the central variable, and it is unclear whether such …
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The ecology, evolution and persistence of an obligate, one-on-one mutualism
… systems). Although obligate, one-on-one mutualisms may be common among intimate, endosymbiotic organisms, they are apparently uncommon between free-living or non-symbiotic organisms (Howe 1984). Many theories have been posulated to explain the rarity of obligate, one-on-one mutalisms but …
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Population oscillations, synchronization, and range expansion in a bacterial cross-protection mutualism
… coli strains can form a cross-protection mutualism, protecting each other in the presence of two antibiotics (ampicillin and chloramphenicol) so that the coculture can survive in antibiotic concentrations that inhibit growth of either strain alone. Moreover, we find that daily dilutions of …
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Facultative mutualism between the navel orangeworm Amyelois transitella (Lepidoptera: Pyralidae) and Aspergillus flavus
… that the interaction represents a facultative mutualism. These studies are here presented in three chapters. First, to determine whether associating with the fungus allows the navel orangeworm to utilize its hostplants more efficiently, I conducted a series of laboratory bioassays to test if …
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Mutualism between honeyguides, beekeepers and honey-hunters in the southern highlands of Tanzania
… bird species that engages in a remarkable mutualism with humans. Honeyguides use a specialised chattering call to guide honeyhunters to bees' nests, which honey-hunters harvest with the help of smoke and tools. Honey-hunters increase their harvesting yield by finding bees' nests with the …
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Aboveground effects of variation in the legume-rhizobium mutualism on insect herbivore Spodoptera exigua
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms
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Modeling Mutualism and Competition in Interactive Population Dynamics: How Ants and Aphids Affect Lycaenid Butterfly Ecology
… populations as well as understanding the role of mutualism in the context of quantitative and theoretical ecology.
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The influence of long-term nitrogen fertilization on symbiosis and metabolism in the legume-rhizobium mutualism
Understanding how mutualisms evolve in response to a changing environment will be critical for predicting the long-term impacts of global changes, such as increased nitrogen (N) deposition. Bacterial mutualists in particular might evolve quickly, thanks to short generation times and the potential …
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