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 22 for “"Holobiont"”.
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Long-term dynamics and theoretical considerations in coral holobiont adaptation
… this idea are the assumptions that coral-holobiont partnerships are flexible in response to the environment, and that their flexibility benefits the host. However, the contributions of host genetics, local environment, and time in structuring the holobiont have not been estimated in …
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Toward a Holobiont Urbanism : microbial sampling scalability through Apis mellifera
We are in constant symbiosis with the 100 trillion microbes in our gut and the complex system of bacteria around us in our environment. Within the field of metagenomics, it's clear that understanding the built environment is necessary in order to learn more about ourselves as participants in this …
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Examination of the nematostella vectensis holobiont by comparative bacterial genomics and metatranscriptomics
… to likely be non-clonal, with no evidence that holobiont-specific orthologous groups (i.e. gene orthologs found only in N. vectensis-associated bacterial genomes and absent in closely related genomes of the same genus/family) were shared across the populations examined. Further, no evidence of …
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Environmental and Biotic Drivers of Seaweed–Bacterial Interactions: Insights into the Seaweed Holobiont
… mediated relationships, operating as a unified holobiont - an integrated functional unit. Host fitness is reliant on this symbiosis, with interactions from epiphytic bacteria necessary for the correct physiological functioning, health, development, and resilience of the seaweed. As seaweeds …
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The effect of environmental factors on the dynamics of bacterial populations associated with coral colonies and the implications for holobiont health
The coral holobiont is comprised of a diverse community of microbial partners, including bacteria living within microhabitats, such as the coral tissue’s and surface mucus layer (SML). However, little is known about the interactions between the bacterial communities in the various compartments of …
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Effects of nitrogen-fixing symbiotic cyanobacteria on the microbial ecology of the coral, Montastraea cavernosa
… with the host compose what is termed the coral holobiont. Whether the cyanobacteria are mutualists, commensals, or parasites, and their effects on the coral holobiont, are unknown. The influence of the cyanobacteria on the microbial ecology of M. cavernosa and overall holobiont fitness were …
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Tropical stony corals host diverse microbial nitrogen dynamics
… viral associates collectively termed the coral holobiont. This holobiont maintains the nutrient balance of their symbiosis amid reefs' otherwise oligotrophic environment, including by cycling physiologically important nitrogen compounds. Nitrogen (N) fixation has been well quantified in corals …
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Coral skeleton density banding: biotic response to changes in sea surface temperature
… crystal precipitation mediated by the coral holobiont response to changes in sea surface temperature (SST). To test this hypothesis, data were collected from coral skeleton-tissue biopsies (2.5 cm in diameter) extracted from four species of Montastraea growing on the fringing reef tract of …
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Corals at the extreme: partitioning the response of coral holobionts to marginal habitats
… microbiota, and how these components of the holobiont interact to define the adaptive capacity of reef-building corals requires further exploration. In this thesis, the thermal tolerance limits of conspecific corals from a mangrove versus a reef habitat were tested in a 20-day heat-ramping …
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Tropical stony corals host diverse microbial nitrogen dynamics
… viral associates collectively termed the coral holobiont. This holobiont maintains the nutrient balance of their symbiosis amid reefs’ otherwise oligotrophic environment, including by cycling physiologically important nitrogen compounds. Nitrogen (N) fixation has been well quantified in corals …
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In Hot Water: Thermal Acclimation is Insufficient to Save Corals in the Anthropocene
… ecosystems collectively referred to as a holobiont. In recent decades, ocean warming has jeopardized the delicate balance of the very symbioses that have enabled coral survival. Thermal stress causes a reduction of algal symbionts, a phenomenon referred to as ‘coral bleaching’ that …
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Variations in marine microbiomes: from habitat to host
… macroorganisms) are increasingly viewed as “holobionts”, an assemblage of the host plus all its symbiotic microbes. This dissertation examines holobiont biology from the perspective of the microbial communities that live in and around marine hosts. Using both amplicon and metagenomic …
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Marine Microbial Communities in Health and Disease: an Exploration of Marine Bacterial Associations Across Space, Time, and Potential Roles Against Pathogens in the Context of the Current Global Climate Change Scenario
… compounds produced by the octocoral holobiont showed bioactivity against pathogens implicated in Stony Coral Tissue Loss Disease, highlighting the presence ofterpenoids in the most active fractions. Moreover, the exploration of the spatial and temporal stability of the bacterial …
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DISCLOSING THE ROLE OF ROOT EXUDATES IN MODULATING THE INTERACTION BETWEEN PLANT AND XENOBIOTIC DEGRADING BACTERIA
… fundamental to maintain the homeostasis of the holobiont, especially upon environmental stresses. This crosstalk is mediated by root exudates (REs), including plant secondary metabolites, that are released by the plant as a ‘cry-for-help’ to recruit beneficial bacteria. Plant-bacteria …
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Individual And Population Responses Of The Caribbean Sponge, Aplysina Cauliformis, To Natural And Anthropogenic Stressors
… symbiont abundance, while decreasing overall holobiont health. A further investigation of the sponge-algal interaction using stable isotopes of carbon and nitrogen shothat algal facilitation was likely due to nitrogen transfer from the sponge. In addition, these experiments shothat algal …
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Culture-independent analysis of the bacterial community shifts in a macroalgal disease
… the notion of an adaptive response by the algal holobiont. Altogether, this thesis contributes to our understanding of the role that bacteria play in marine diseases.
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The Gut Microbiome and its Relationship to Migratory Behaviour and Fate in Wild Fishes
… and demonstrates the value of incorporating a holobiont approach.
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Quantitative tracking of the cellular and skeletal response of the Caribbean coral Orbicella annularis to gradients in marine sewage pollution
… throughout the Caribbean Sea. The O. annularis holobiont (all interacting biotic and abiotic components making up the coral) is negatively impacted by increased exposure to anthropogenic pollution, which results in altering coral physiology and increasing the risk of disease infection. Changes …
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Investigating physiological collaborations between a lower termite and its symbionts
… RNAseq to capture a snapshot of the termite holobiont transcriptional response following pathogen challenge. This strategy served as a means of pinpointing critical taxa and physiological roles of microbes in this system by taking a global, metatranscriptomic approach. Differential expression …
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