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 90 for “"community assembly"”.
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Bacterial Interspecies Interactions and Microbial Community Assembly
… yet the dominant processes shaping microbiota assembly remain unresolved. In this thesis, I leverage a bottom-up approach to experimentally build synthetic microbial communities and to test the prevalence of different ecological and evolutionary forces. High-throughput experiments in nanoliter …
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Fish Community Assembly in the Missouri River Basin
… of investigations intended to explain fish community structure and composition therein. I focused on relations between environmental characteristics and fish species because abiotic factors are considered most important for stream fish community dynamics, particularly within harsh streams, …
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Plant community assembly and biodiversity: a spatio-temporal perspective
… changes in the multiple facets of diversity, and assembly processes that drive these changes, were investigated along a more than 300 year long chronosequence representing an arable to semi-natural grassland succession. Both grassland plant species richness and functional trait diversity in …
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Intraspecific trait variation and community assembly in old-field grasslands
… approaches are increasingly used in plant community ecology, but previous research has largely ignored functional trait variation within species. Here I investigated the role of intraspecific trait variation in community assembly and responses to spatial and temporal environmental variation …
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Disentangling the influence of dispersal on community assembly and stability
With the introduction of metacommunity theory, the field of community ecology expanded its scope to include patterns and processes beyond the scale of local communities. Dispersal, or the movement of organisms between sites, can play an influential role in generating patterns of community assembly …
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Fish Community Assembly At Multiple Spatial Scales In East Texas Streams
… of environmental variables in the stream fish assembly process, and increases the ability to predict species distributional responses associated with environmental change.</p>
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Unraveling key drivers of microbial community assembly and impacts on microbial function
To view the abstract, please see the full text of the document.
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Effects of diversity on community assembly dynamics in newly formed pond communities
… diversity in a new habitat will influence community assembly dynamics. Previous studies have shown that species diverse communities can buffer against invasion by heterospecifics. In addition, the monopolization hypothesis predicts that a genetically diverse population will be more likely …
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Tree community assembly and biogeochemical processes along an elevational gradient in western Panama
… dynamics are critical to predicting their plant community response to global change. Elevational and environmental gradients are key elements in our understanding of the effect of climate, edaphic and biotic interactions in plant community assembly and biogeochemical processes. Changes in …
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Ecological legacies from grasslands to agroecosystems : microbial ecology, plant community assembly, and resource allocation
… and biological properties along with the plant community composition in response to land-use changes is poorly understood. These ecological variables are often compared to like compositions and ecological structures (i.e., agricultural soils to agricultural soils, forested soils to forested …
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The Effects of Geography, Environment and Phylogeny on Community Assembly and Gene Flow Dynamics
… to understand how space and environment affect community composition and patterns of gene flow in a unique system of Atlantic rainforest and restinga (sandy coastal plains) habitats in Southeastern Brazil.</p><p>In chapter one I investigate how space and environment affect the population genetic …
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Leaf Volatile Emissions Structure Tree Community Assembly and Mediate Climate Feedbacks in Tropical Forests
… that isoprene emission influences plant community assembly shifts across environmental gradients and through time in tropical forests. The capacity for a species to produce isoprene was associated with increased relative abundance at higher temperatures and following drought anomalies. A …
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Fish Community Assembly in the Forest River, North Dakota, and Resolution of Campostoma Species Presence
… provided the opportunity to investigate the fish community associated with the Red River basin of North Dakota. The first aspect I examined was the presence of the genus Campostoma. In this aspect, I investigated the Campostoma species that were present historically and documented the species that …
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MICROBIAL COMMUNITY ASSEMBLY AND DIVERSIFICATION OF THE GENUS CHLOROFLEXUS ALONG AN ALKALINE HOT SPRING GRADIENT
… scales, bacterial groups differ in their community assembly patterns. Specifically, phototrophic groups show the strongest evidence for non-random assembly, most likely due to competition for light. A major exception to this pattern is the genus Chloroflexus, a major member of these …
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MICROBIAL COMMUNITY ASSEMBLY AND DIVERSIFICATION OF THE GENUS CHLOROFLEXUS ALONG AN ALKALINE HOT SPRING GRADIENT
… scales, bacterial groups differ in their community assembly patterns. Specifically, phototrophic groups show the strongest evidence for non-random assembly, most likely due to competition for light. A major exception to this pattern is the genus Chloroflexus, a major member of these …
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Linking mechanism to pattern in community assembly: Ant-mediated seed dispersal in neotropical pioneer tree species
Dispersal is a fundamental process that affects all aspects of an organism’s biology including its distribution, genetic structure, demography, and reproduction. Ant-mediated seed dispersal has evolved multiple times in many biogeographical locations. Most research in this area has focused on …
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Microbial community assembly and hydrologic variability as controls on potential denitrification rates in restored freshwater wetlands
Made available in DSpace on 2018-09-27T16:30:16Z (GMT). No. of bitstreams: 3 COHEN-DISSERTATION-2018.pdf: 16901181 bytes, checksum: 054fea42926998dd176783c0ceada556 (MD5) LICENSE.txt: 4207 bytes, checksum: cf01f0a3e7002722d46489a4ebca992a (MD5) PROQUEST_LICENSE.txt: 4553 bytes, checksum: …
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A functional and trait-based approach in understanding ant community assembly in the Soutpansberg Mountains, South Africa
… diversity patterns and the mechanism underlying community assembly. However, functional and trait diversity can further explain the factors driving community assembly because they capture different aspects of species ecological roles such as habitat requirements and resource use. To investigate …
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When do propagules matter? The role of ecological filters and regeneration dynamics during community assembly in tallgrass prairie restorations
… composition and contribution of propagules for community regeneration in degraded environments. Three studies were conducted to elucidate the role of regeneration dynamics and dominant species on community assembly during tallgrass prairie restoration. In the first study, patterns in the …
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