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 122 for “"dinoflagellate"”.
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THE ORIGIN OF THE DINOFLAGELLATE PLASTID
The peridinin pigmented dinoflagellate chloroplasts are the result of a secondary endosymbiotic event between a photosynthetic eukaryote and a dinoflagellate. Dinoflagellate chloroplast and nuclear evolution were independent before this endosymbiotic event. To reconstruct the evolution of the …
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TURONIAN DINOFLAGELLATE CYST ASSEMBLAGES FROM SOUTHERN ENGLAND
… work has directly addressed the variation in dinoflagellate cyst assemblages and the resulting biostratigraphy from the Turonian of southern England. Sampling (every 1-2m) of the whole succession from three areas (Dover, Sussex and the Isle of Wight), together with sedimentological and …
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Phylogeny and biogeography of the toxic dinoflagellate Alexandrium
… range of PSP toxin-producing Alexandrium dinoflagellates explains the increase in PSP, but the reasons for changes in Alexandrium occurrence are unknown. This thesis explores the phylogeny, taxonomy, and biogeography of Alexandrium in light of this recent expansion. Alexandrium phylogeny …
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Palynological insights into the Mid Jurassic dinoflagellate radiation
Dinoflagellates are a diverse group of flagellated eukaryotes, the majority of which are marine plankton, and are one of the most important groups of primary producers in the world’s oceans. The dinoflagellate fossil record is based on their zygotic resting cysts; this record indicates that the …
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A turbulent diatom vs dinoflagellate phytoplankton biomass model
… dominated phytoplankton blooms followed by dinoflagellate blooms are common in the Southern Benguela, and are often associated with Harmful Algal Blooms. A well-known ecological explanation for the succession of diatoms to dinoflagellates is given by Margalef’s Mandala which attributes the …
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Dinoflagellate blooms and physical systems in the Gulf of Maine
Numerous studies have shown dinoflagellate blooms to be closely related to density discontinuities and fronts in the ocean. The spatial and temporal patterns of the dinoflagellate population depend on the predominant mode of physical forcing, and its scales of variability. The present study …
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Integrated Study Of Dinoflagellate Diversity In The Gulf of Naples
Dinoflagellates are a diverse lineage of protists known as an essential component of marine planktonic communities. To study their seasonal diversity at the LTER-MC station in the Gulf of Naples, I used high throughput sequencing (HTS) metabarcoding of the V4 region in the 18S rDNA. To …
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Dinoflagellate biostratigraphy of the Cretaceous-Tertiary boundary, Round Bay, Maryland
… Brightseat Formations contain a rich and diverse dinoflagellate assemblage. Thirty-five genera and sixty-six species, of which two genera and eight species are new, are described in this study. The stratigraphic distribution of the taxa is summarized in Figure 4. The content of the assemblage …
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Feeding, Dark Survival, and Foreign Organelle Retention in an Antarctic Dinoflagellate
… of novel permanent plastids. A gymnodinoid dinoflagellate isolated from the Ross Sea, Antarctica (RSD) retains plastids from its haptophyte prey Phaeocystis antarctica. It is a member of the Kareniaceae, a dinoflagellate family whose other members all contain permanent tertiary plastids of …
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Population ecology of the dinoflagellate species Lingulodinium Polyedrum in southern California
Marine dinoflagellates are an ecologically important phytoplanktonic group that accounts for two thirds of all known harmful algal bloom (HAB) species. This study explores the population ecology of Lingulodinium polyedrum (F. Stein) J.D. Dodge, a common bloom-forming dinoflagellate species in …
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Toxins and Toxicity from the Cosmopolitan, Bloom-Forming Dinoflagellate Karlodinium micrum
Karlodinium micrum (Leadbeater and Dodge) Taylor was first described in the United States during an investigation into the cause of repeated fish kills at an estuarine aquaculture facility located on a tributary of the Chesapeake Bay, MD, USA. As part of that investigation we described toxins in …
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Life cycle studies of the red tide dinoflagellate species complex Alexandrium tamarense
Blooms of toxic species within the algal dinoflagellate species complex Alexandrium tamarense may cause Paralytic Shellfish Poisoning, a significant and growing environmental threat worldwide. However, blooms of closely related nontoxic A. tamarense also occur, sometimes in close geographical …
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Mating interactions of the harmful dinoflagellate alexandrium tamarense from UK coastal waters
… economically and ecologically important marine dinoflagellates. The complex is comprised of three morphospecies A. tamarense, A. fundyense and A. catenella grouped according to ribosomal DNA or ‘ribotype’. There are five ribotype type groups (I-V) each consisting entirely of toxic or non-toxic …
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Optimisation of high value metabolite production from benthic marine dinoflagellate Prorocentrum lima.
… proposed. Contrary to common observations for dinoflagellate culture, P. lima CCAP 1136/11 was found to be able to withstand increased sparging within the culture system, resulting in concomitant increased of growth and production of OA, DTX1 and peridinin. Future works have been suggested to …
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Life cycle studies of the red tide dinoflagellate species complex Alexandrium tamarense
Blooms of toxic species within the algal dinoflagellate species complex Alexandrium tamarense may cause Paralytic Shellfish Poisoning, a significant and growing environmental threat worldwide. However, blooms of closely related nontoxic A. tamarense also occur, sometimes in close geographical …
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Physiological and behavioral diagnostics of nitrogen limitation for the toxic dinoflagellate Alexandrium fundyense
… algal bloom (RAB) species such as the toxic dinoflagellate Alexandrium fundyense which typically inhabit coastal regions where they are not usually dominant. Within the Gulf of Maine, environmental factors, specifically nitrogen, are likely to be a controlling factor for A. fundyense blooms. …
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Identifying and Characterizing Non-Coding RNAs in the Dinoflagellate <i>Karenia brevis</i>
… economic health. Karenia brevis, a mixotrophic dinoflagellate, forms HABs, and blooms caused by this organism have been known to remain several months after formation. For these reasons, research has been conducted to discover those factors that are responsible for the formation, maintenance and …
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Infections of the Norway lobster, Nephrops norvegicus (L.) by dinoflagellate and ciliate parasites
Parasitic dinoflagellates of the genus Hematodinium have been reported from a number of commercially important crustacean hosts, including the Norway lobster, Nephrops norvegicus, from the coastal waters of Scotland. Several methods for detection of the parasite have been developed but each has …
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Physiological and behavioral diagnostics of nitrogen limitation for the toxic dinoflagellate Alexandrium fundyense
Thesis (Ph. D.)--Joint Program in Biological Oceanography (Massachusetts Institute of Technology, Dept. of Ocean Engineering; and the Woods Hole Oceanographic Institution), February 2001.
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The physiology of dormancy and germination in cysts of the marine dinoflagellate Scrippsiella trochoidea
… non-motile resting cells produced by many dinoflagellates. Although the influence of cysts on the biology and ecology of dinoflagellates may be significant, little is known of the factors controlling cyst dormancy and germination, or of the metabolic foundations of these processes. This …
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