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.
Results
Showing 1 to 9 of 9 for “"Marine microbiology"”.
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Insights into vitamin B12 production, acquisition, and use by marine microbes
The distribution and magnitude of marine primary production helps determine the ocean's role in global carbon cycling. Constraining factors that impact this productivity and elucidating selective pressures that drive the composition of marine microbial communities are thus essential aspects of …
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Molecular biogeochemistry of modern and ancient marine microbes
… This thesis addresses aspects of the role of marine microorganisms in driving this process. In the first section of the thesis, biomarkers (hydrocarbon molecular fossils) are used to investigate the early history of microbial diversity and biogeochemistry. Molecular fossils from the Transvaal …
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Ecology and population structure of Vibrionaceae in the coastal ocean
… wide range of environmental categories, such as marine invertebrates or particles in the water column. Additionally, it seeks to determine whether in situ population distributions directly result from a competitive advantage over other Vibrio populations. This was investigated by in vitro …
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Unraveling the Eco-Evolutionary Complexity of Uncultivated Bacteriophages in the Biosphere
… a variety of metagenomic datasets, namely from marine environments. Toward understanding the coexistence of jumbo phages among smaller phages, Chapter 1 provides a literature review on jumbo phage diversity, associated fitness tradeoffs of largeness, and predictions on which environments or …
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Investigating virus-host interactions in a changing Arctic Ocean
The Arctic Ocean (AO) is changing at an unprecedented rate, with sea ice loss, warming and freshening affecting microbial community dynamics, including primary productivity. In the Arctic, primary production is driven by eukaryotic phytoplankton and one picoeukaryote in particular, Micromonas …
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Assimilatory sulfur metabolism in marine microorganisms
… organic sulfur compounds was studied in aerobic marine bacteria, with emphasis on the relationship between sulfur metabolism and protein synthesis. The goal of the study was to develop and apply a method for the quantitative assay of total bacterial protein synthesis in aerobic ocean waters. The …
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Genomics approaches to exploit the biotechnological potential of marine sponge-derived Streptomyces spp. isolates
… diverse environmental niches, such as marine ecosystems, mangroves, and symbiotic communities of insects and sponges, resulting in the discovery of a variety of previously unidentified compounds of pharmacological interest; including those isolated from marine-derived Streptomyces …
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Marine bacteria as a source of polyester-degrading enzymes with biocatalytic potential
… few PET-hydrolyzing enzymes were reported from marine environments, an aspect which we hoped to expand upon. In chapter 2, activity screening and genome mining of marine bacterial isolates led to the identification of a polyesterase, BgP, from a deep-sea, marine sponge-derived Brachybacterium …