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 74 for “"dinoflagellates"”.
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The ecology and feeding biology of thecate heterotrophic dinoflagellates
A group of thecate heterotrophic dinoflagellates (THDs), principally in the diverse and ubiquitous genus Protoperidinium, was investigated both from an ecological and an organismal perspective. When this study was initiated, nothing was known about their feeding mechanisms, rates or food …
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Bioluminescence in dinoflagellates – diversity, molecular phylogeny and field ecology
Marine dinoflagellates 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 …
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Dynamic systems analysis of fossil dinoflagellates from the Atlantic Coastal Plain, USA
Dynamic Systems modeling suggests that complex coastal dinoflagellate biosystems can be modeled using environmental parameters such as temperature, salinity, and bulk nutrient levels. The former Salisbury Embayment of northern Virginia and Maryland is modeled here, using STELLA I and FORTRAN models …
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Nucleosome-independent permanently condensed chromosome: investigation of novel nuclear organisation in the dinoflagellates
Dinoflagellates hold vast diversities and are major contributors to overall marine primary production. Close relatives to the apicomplexan parasites and ciliates, the dinoflagellates, however, have a shockingly different nuclear biology. The dinoflagellates have massively inflated genomes (2-245 …
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The ecology, life history, and phylogeny of the marine thecate heterotrophic dinoflagellates Protoperidinium and Diplopsalidaceae (Dinophyceae)
Marine thecate heterotrophic dinoflagellates likely play an important role in the consumption of primary productivity and in the trophic structure of the plankton, yet we know little about these species. This thesis expanded our understanding of the autecology and evolutionary history of the …
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The ecology, life history, and phylogeny of the marine thecate heterotrophic dinoflagellates Protoperidinium and Diplopsalidaceae (Dinophyceae)
Marine thecate heterotrophic dinoflagellates likely play an important role in the consumption of primary productivity and in the trophic structure of the plankton, yet we know little about these species. This thesis expanded our understanding of the autecology and evolutionary history of the …
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Assessing the photosynthetic impact of inorganic carbon in symbiotic dinoflagellates in culture and in coral host complexes
Increased atmospheric carbon dioxide concentrations are causing warming of the Earth's atmosphere and having significant effects on the chemistry of the oceans. Disruption to seawater biochemistry is causing associated pH change known as ocean acidification and increased concentrations of dissolved …
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Initial assessment of triplex PCR assay application for detection of toxic dinoflagellates, Alexandrium species (Dinophyceae), in environmental samples
The frequency and geographical range of hannful algal blooms (HABs) are believed to be on the increase, with adverse affects on marine and human health making the implementation of stringent controls governmg monitoring programmes commonplace. The South African monitoring programme was established …
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Palynostratigraphy of the Eocene Little River Section, Grays Harbor County, Washington
… Laevigatosporites type-2, trilete type-2 and D-6 dinoflagellates. Zone 2, of middle Eocene age, is recognized by the presence of Proteacidites Laevigatosporites type-2, tricolpate reticulate type-1,trilete type-2, and D-14 and D-15 dinoflagellates. Zone 3, of late Eocene age, is recognized by …
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THE ORIGIN OF THE DINOFLAGELLATE PLASTID
… selected expressed genes were sequenced from two dinoflagellates, <i>Lingulodinium polyedra</i> and <i>Amphidinium carterae</i>. From these genes, thirty typically plastid-encoded genes were found, including eight otherwise known only from plastid genomes. Based on poly-A tails, gene families, and …
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Comparative laboratory study of photoacclimation in selected dinoflagellate and diatom species of the Benguela ecosystem
… water column induced by turbulence whereas the dinoflagellates (migrators and layer-formers) tend to control their vertical positions. In these two groups of phytoplankton physiological acclimation to these fluctuations results in the variation of a number of measurable photosynthetic parameters …
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A turbulent diatom vs dinoflagellate phytoplankton biomass model
… explanation for the succession of diatoms to dinoflagellates is given by Margalef’s Mandala which attributes the successional change to the interaction between turbulence and available nutrient concentration. This study introduced a simple variable accounting for the effects of turbulence to a …
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Thermal responses of marine phytoplankton: Implications to their biogeography in the present and future oceans
… of growth and toxin production in marine dinoflagellates. In Chapter 6, I also conducted laboratory experiments to test the effect of increased temperature on growth and competition in marine phytoplankton using dinoflagellates as test organisms. The key results of this thesis are as …
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Dinoflagellate Cyst Biostratigraphy, Palynofacies and Paleoenvironmental Analysis of the Maastrichtian and Basal Danian, Brazon River, Texas
… Biostratigraphically important species of dinoflagellates divide the section into three intervals. Interval 1 occurs within the Neylandville Formation, and the presence of Alterbidinium acutulum, Xenascus ceratioides and Isabelidinium cooksoniae indicate that this interval is not younger …
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Campanian-Maestrichtian and Paleocene dinoflagellate and acritarch assemblages from the Maryland-Delaware Coastal Plain
… of ranges of eight species and one subspecies of dinoflagellates and one acritarch species, and by the first appearance of 13 species of dinoflagellates. An unconformity representing a time interval of unknown duration may separate Cretaceous and Tertiary strata in the study area in Maryland; …
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Simulation of high resolution winds over the southern Benguela upwelling system with potential application to harmful algal blooms
… which are attributed to dinoflagellate species. Dinoflagellates are favoured by stratified conditions. Consequently, temporal or spatial variations in ocean and atmospheric conditions that favour stratification will encourage HAB development. Temporally, prolonged relaxation of the dominant …
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Nano- e microfitoplâncton da Baía de Guanabara (RJ, Brasil) em condições tróficas distintas: aspectos estruturais e pré-funcionais
… were the best-represented species, followed by dinoflagellates. For the nanophytoplankton, it was identified just some groups (diatoms, dinoflagellates, cryptophytes and cyanobacteria) due to methodology of analysis (just epifluorescence). Median diversity of microphytoplankton was 2.43 …
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Dinoflagellate cysts of the Gymnodiniaceae, Peridiniaceae, and Gonyaulacaceae from the Upper Cretaceous Monmouth Group, Atlantic Highlands, New Jersey
… determined paleoecological data and that of the dinoflagellates allows for interpretation of dinoflagellate distribution relative to particular marine to brackish water paleoenvironments. Cordosphaeridium varians n. sp. and Exochosphaeridium bifidum (Clarke and Verdier) Clarke et al. 1968 are …
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Responses of Boom-Forming Phytoplankton Populations to Changes in Reservoir Chemistry and Physics
… how three bloom-forming phytoplankton taxa, the dinoflagellates Peridinium and Gymnodinium, and the cyanobacterium Planktothrix, respond to horizontal and vertical environmental gradients, respectively. First, I monitored recruitment, or the process of leaving the sediments and entering the …
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