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 “"priority effects"”.
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Historical contingency and priority effects impact the decomposition of dead microbial biomass
… of ecological communities. These so-called ‘priority effects’ can occur when the early arriving species modify their environment to make it more or less suitable for subsequent colonizers (i.e., niche modification) or when the early arriving species exhaust resources and thus limit subsequent …
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The role of priority effects in the assembly of the amphibian microbiome
… how stochasticity in dispersal that leads to priority affects can impact bacterial community assembly in amphibian embryos. In chapter 1, I experimentally show that priority effects resulting from stochastic dispersal can be observed in the microbiome of newly-hatched hourglass treefrog …
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Priority effects of overwintered Rana tadpoles on larval Southern toad (Bufo terrestris Bonnaterre)
… frog and Southern toad; and density-dependent effects. Leopard frog tadpoles had their primary adverse effect on Southern toads through processes occurring during the winter, prior to the arrival of Southern toads. The other mechanisms tested were not significant. The algal resource on which …
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Testing the potential of priority effects to sustainably increase community function in semi-natural grasslands
… interact at a certain location are called priority effects. The topic of this dissertation is the investigation of priority effects in plant communities, more detailed, the potential for priority effects to influence central European semi-natural grasslands in terms of functionality …
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The role of the Vibrio cholerae Type VI secretion system during kin cell interaction, biofilm formation and priority effects
… clear if there is a direct connection between priority effects and T6SS activity in kin cell interaction, and how this interaction shapes a bacterial niche. Therefore, to mimic the internal spatial restriction in a host we formed biofilms in-vitro, using A1552 kin <em>V. cholerae </em>cells, …
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Population structure of the cyanobacterium Microcystis mediated by history, grazing and interstrain interactions
… thesis that history (dispersal limitation and priority effects), grazing and interstrain interactions influence Microcystis population structure in a strongly strain-specific way depending on the functional traits of the strains, and that these factors also interact with each other. At global …
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On the ecology of Acer circinatum Pursh: a study of factors that affect the distribution of a small hardwood tree within oldgrowth forests in southwestern British Columbia, Canada
… microtopography and of vine maple persistence, priority effects and layering on the distribution pattern of vine maple within oldgrowth stands was investigated in this study. The distribution pattern was primarily influenced by surficial geology. High vine maple cover was significantly connected …
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The importance of density-dependent mechanisms in determining cohort survival in largemouth bass
… advantage in largemouth bass, the phenomenon, priority effects, has been observed in many other kinds of organisms. Unlike previous studies, I was able to document asymmetrical exploitative competition as the primary mechanism of survival. Because evolutionary processes favor early spawning and …
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Effects of diversity on community assembly dynamics in newly formed pond communities
… evolution of a focal population can enhance priority effects thereby decreasing invasibility of later arriving colonists (termed evolution-mediated priority effects). Nevertheless, empirical investigations of these diversity effects, at both the genetic and species level remain rare, …
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Integrating Above and Belowground Components of Biodiversity across Spatial Scales: The Role of Host Plants in the Distribution of Arbuscular Mycorrhizal Fungi
… phenotypic trade-offs between AM fungi, and of priority effects influencing diversity and unevenness. Difference between plant species in the heterogeneity of surrounding soil was dependent on spatial scale. The effect of decreased carbon allocation on AM fungal communities is greater in more …
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The population and community ecology of small freshwater ponds: Assigning process to pattern
… highlighted the importance of considering the effects of both historical (i.e., colonization history and priority effects) and contemporary processes (e.g., species sorting and interspecific interactions) when studying population and community dynamics. Multiple studies have documented that …