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 63 for “"protists"”.
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Recoding and reassignment in protists
… provide evidence of novel decoding mechanisms in protists, as identified through bioinformatics analysis. To begin with I analysed the genomes of two ciliate species, Euplotes crassus and E. focardii. In combination with the analysis of E. crassus transcriptome using ribosome profiling, I …
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Novel mitochondrial metabolism in excavate protists
… contains a massively diverse range of protists that inhabit a plethora of different trophic niches. Many excavates are free-living and little-studied, but there are also many examples of parasitism evolving multiple times within the group. Trypanosoma brucei is a euglenozoan parasite …
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Mechanisms of cell damage and recovery in cryopreserved freshwater protists
… preservation of presently freeze- recalcitrant protists. The benefits of using investigative rather than speculative approaches to develop cryoprotocols are discussed.
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Bacterial biodegradation of soluble crude oil hydrocarbons and the influence of protists in simulated arctic seawater and sea ice
… occur in Arctic marine waters. The influence of protists on bacterial biodegradation of water accommodated fractions (WAF) of petroleum hydrocarbons is unknown, yet important because it could enhance or hinder biodegradation.</p><p>The objectives of this research were to calculate biodegradation …
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Decoding divergence in marine protistan communities: from strain diversity to basin biogeography
Protists (microbial eukaryotes) in the global ocean are critical components of primary productivity and nutrient recycling. Protists are genetically diverse and have distinctive ecological niches based on genetically-driven differences in physiological fitness. A deeper understanding of which …
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Decoding divergence in marine protistan communities: from strain diversity to basin biogeography
Protists (microbial eukaryotes) in the global ocean are critical components of primary productivity and nutrient recycling. Protists are genetically diverse and have distinctive ecological niches based on genetically-driven differences in physiological fitness. A deeper understanding of which …
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Gut-associated microbial symbionts of the marsh fiddler crab, Uca pugnax
… tract. This is the first report of the eccrinid protists, Enteromyces callanassae and Enterobryus sp., inhabiting U. pugnax. The greatest abundances of both bacteria and protists were documented in the host stomach and hindgut. For these sections, we have described morphologies, measured …
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New insights on the ecology of free-living heterotrophic nanoflagellates based on the use of molecular biological approaches
Nanoplanktonic protists comprise a diverse assemblage of flagellate species responsible for various trophic processes in marine and freshwater ecosystems. Current methods for identifying small protists do not readily permit identification and enumeration of nanoplanktonic flagellates in cultures or …
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Trojan horses in the marine realm: characterizing protistan parasite ecology in coastal waters
Protists are taxonomically and metabolically diverse drivers of energy and nutrient flow in the marine environment, with recent research suggesting significant roles in global carbon cycling throughout the water column. Top-down controls on planktonic protists include grazing and parasitism, …
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Trojan Horses in the Marine Realm: Characterizing Protistan Parasite Ecology in Coastal Waters
Protists are taxonomically and metabolically diverse drivers of energy and nutrient flow in the marine environment, with recent research suggesting significant roles in global carbon cycling throughout the water column. Top-down controls on planktonic protists include grazing and parasitism, …
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Ciliate micrograzer dynamics of the New England Shelf
Protists play important roles in grazing and nutrient recycling, but quantifying these roles has been hindered by difficulties in collecting, culturing, and observing these often-delicate cells. During long-term deployments at theMartha’s Vineyard Coastal Observatory (MVCO) (Massachusetts, USA), …
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Ecological forces affecting microbial eukaryotes in the coastal ocean
Marine microbial eukaryotes (protists) play a central role in the global biogeochemical cycles. Protist communities comprise carbon-fixing eukaryotic phytoplankton, which comprise the base of the marine food web, heterotrophic protists, which are predators of other microbes, and mixotrophs, which …
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Ciliate micrograzer dynamics of the New England shelf
Protists play important roles in grazing and nutrient recycling, but quantifying these roles has been hindered by difficulties in collecting, culturing, and observing these often-delicate cells. During long-term deployments at the Martha's Vineyard Coastal Observatory (MVCO) (Massachusetts, USA), …
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Molecular systematics of Plasmodiophora brassicae
… have been classified in various ways as both protists and fungi. It is not known which, if any, of these classification schemes reflects the actual evolutionary relationships of this group.
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Eukaryotic Microbes in the Deep Sea: Abundance, Diversity, and the Effect of Pressure
… of pressure and temperature on physiology. Protists, functionally defined as the microbial portion of the domain Eukarya, are particularly neglected in studies of deep-sea microbiology. Here, I present three studies on microbial eukaryotes in the deep sea: first, a study of the abundance of …
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Mechanisms and ecological implications of resistance to predation by heterotrophic ciliates expressed by marine bacteria
… by bacterivorous bacteria and heterotrophic protists. The environmental persistence of marine bacteria can be attributed to multiple intra- and inter-specific strategies such as biofilm formation on biotic and abiotic surfaces, as well as interactions with other organisms, e.g. algae and …
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Eukaryotic Parasites of Toxic and Bloom-forming Diatoms: Molecular insights in their diversity and physiology
… truthful in the case of heterotrophic protists, more difficult to establish as clonal cultures in lab conditions than their phototroph counterpart. Only with the recent application of molecular ecology methods, we have started to gain deeper insights in the structure of complex …
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Bioluminescence in dinoflagellates – diversity, molecular phylogeny and field ecology
… are an ecologically important group of protists within the plankton, performing key process such as photosynthesis, heterotrophy and toxin production. Some dinoflagellates are also capable of producing bioluminescence and they are the most abundant protists that produce light in the …
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The Evaluation of the Endophytic Mycobiome of Magnolia grandiflora
… the plant’s microbiome and consists of bacteria, protists and fungi. Asymptomatic microbes occupying internal tissues of plants are called endophytes. Fungal endophytes are of major importance because they exist in the healthy tissues of all terrestrial plants and have in some cases been shown to …
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