Dinoflagellate

About: Dinoflagellate is a research topic. Over the lifetime, 3072 publications have been published within this topic receiving 108793 citations. The topic is also known as: dinoflagelate & dinoflagellate.

Carbon to volume relationships for dinoflagellates, diatoms, and other protist plankton

Abstract: Cellular carbon and nitrogen content and cell volume of nutritionally and morphologically diverse dinoflagellate species were measured to determine carbon to volume (C : vol) and nitrogen to volume (N : vol) relationships. Cellular C and N content ranged from 48 to 3.0 3 10 4 pgC cell 21 21 5

Physiological ecology of harmful algal blooms

Abstract: Preface Taxonomic Notes Theme 1: Autecology. The Alexandrium Complex and Related Species - The Neurotoxigenic Dinoflagellate Genus Alexadrium Halim: General Introduction - Morphological, Genetic and Biogeographic Relationships of Toxic Dinoflagellates Alexandrium tamarense, A. catenella and A. fundyense - Physiology and Bloom Dynamics of Toxic Alexandrium Species, with Emphasis on Life Cycle Transitions - Genetic and Biochemical Approaches to PSP Toxin Production of Toxic Dinoflagellates - Bloom Dynamics of the Toxic Dinoflagellate Gymnodinium catenatum, with Emphasis on Tasmanian and Spanish Coastal Waters - Physiology and Bloom Dynamics of the Tropical Dinoflagellate Pyrodinium bahamense Fish-killing Species - Ecophysiology, Life Cycle, and Bloom Dynamics of Chattonella in the Seto Inland Sea, Japan - Ecophysiology and Bloom Dynamics of Heterosigma akashiwo (Raphidophyceae) - Bloom Dynamics and Physiology of Gymnodinium breve with Emphasis on the Gulf of Mexico - Bloom Dynamics and Ecophysiology of the Gymnodinium mikimotoi Species Complex - Physiological Ecology of Pfiesteria piscicida, with General Comments on "Ambush-Predator" Dinoflagellates - Bloom Dynamics and Physiology of Prymnesium and Chrysochromulina - Autecology of the Marine Haptophyte Phaeocystis sp. - Genetic Variation in Harmful Algal Bloom Species: An Evolutionary Ecology Approach Other HAB Species - Bloom Dynamics and Ecophysiology of Dinophysis spp. - Bloom Dynamics and Phyiology of Domoic-Acid-Producing Pseudo-nitzschia Species - Community Dynamics and Physiology of Epiphytic/Benthic Dinoflagellates Associated with Ciguatera - Aspects of Noctiluca (Dinophyceae) Population Dynamics - Development of Nucleic Acid Probe-Based Diagnostics for Identifying and Enumerating Harmful Algal Bloom Species - Parasites of Harmful Algae Autecology: Synthesis - Concluding Remarks on the Autecology of Harmful Algal Blooms Theme 2: Ecophysiolgical Processes and Mechanisms Ecophysiological Role of Toxin Production - Ecophysiology and Metabolism of Paralytic Shellfish Toxins in Marine Microalgae - Ecophysiology and Metabolism of ASP Toxin Production - Ecophysiology and Biosynthesis of Polyether Marine Biotoxins Zooplankton Grazing - Interactions Between Toxic Marine Phytoplankton and Metazoan and Protistan Grazers Eutrophication and Nutrient Supply - Species Composition of Harmful Algal Blooms in Relation to Macronutrient Dynamics - Trace Elements and Harmful Algal Blooms - Utilization of Dissolved Organic Matter (DOM) by Phytoplankton, Including Harmful Species - Phagotrophic Mechanisms and Prey Selection in Mixotrophic Phytoflagellates - The Ecological Significance of Phagotrophy in Photosynthetic Flagellates Swimming Behaviour Buoyancy and Small-Scale Physical Processes - Behaviour, Physiology and the Niche of Depth-Regulating Phytoplankton - A Comparison of How Different Orientation Behaviours Influence Dinoflagellate Trajectories and Photoresponses in Turbulent Water Columns - Effects of Turbulence on Phytoplankton Bacterial Interactions with Harmful Algal Bloom Species - Bacterial Interactions with Harmful Algal Bloom Species: Bloom Ecology, Toxigenesis, and Cytology - Ecophysiological Processes and Mechanisms: Towards Common Paradigms for Harmful Algal Blooms Microalgae ASI Participants List Index

Community Assembly in Marine Phytoplankton: Application of Recent Models to Harmful Dinoflagellate Blooms

Abstract: AMBLESIDE, CUMBRIA LA  LP, UK The habitat preferences of dinoflagellate bloom species along an onshore‐offshore, mixing-nutrient gradient, their associated life-form (morphotype) characteristics and adaptive strategies were evaluated from the perspective of Margalef ’s Mandala and Reynolds Intaglio. Nine different mixingnutrient habitats and associated dinoflagellate life-form types having distinctive morphotype features and habitat preferences are distinguishable. Reynolds Intaglio provided greater fidelity to actual in situ dinoflagellate community assembly than the Mandala. We suggest that the correlation between degree of mixing and nutrient levels presumed in the Mandala is not the essential interaction in the selection of life forms and their succession. A more significant aspect of the turbulence axis is the degree of vertical, micro-habitat structural differentiation that it permits. Three primary adaptive strategies consistent with C-S-R strategies recognized among freshwater phytoplankton species characterize the component dinoflagellate species: invasive, small- to intermediate-sized colonist species (C) which often predominate in chemically-disturbed water bodies; acquisitive, larger-celled, nutrient stresstolerant species (S); and disturbance-tolerant ruderal species (R) tolerant of shear/stress forces in physically-disturbed water masses (fronts, upwelling relaxations, current entrainment). It is suggested that harmful algal bloom community assembly and dynamics reflect two basic selection features— life-form and species-specific selection, that commonly held life-form properties override phylogenetic properties in bloom-species selection, and that the latter is often stochastic, rather than singular. The high degree of unpredictability of individual species blooms is consistent with stochastic selection, e.g. bloom species are often selected as a result of being in the right place at the right time at suitable inoculum levels. A focus on the life-form properties, habitat preference and stochastic selection of bloom species would appear to be more viable and realistic than current ecological investigative approaches.

Growth, feeding and ecological roles of the mixotrophic and heterotrophic dinoflagellates in marine planktonic food webs

Abstract: Planktonic mixotrophic and heterotrophic dinoflagellates are ubiquitous protists and often abundant in marine environments. Recently many phototrophic dinoflagellate species have been revealed to be mixotrophic organisms and also it is suggested that most dinoflagellates may be mixotrophic or heterotrophic protists. The mixotrophic and heterotrophic dinoflagellates are able to feed on diverse prey items including bacteria, picoeukaryotes, nanoflagellates, diatoms, other dinoflagellates, heterotrophic protists, and metazoans due to their diverse feeding mechanisms. In turn they are ingested by many kinds of predators. Thus, the roles of the dinoflagellates in marine planktonic food webs are very diverse. The present paper reviewed the kind of prey which mixotrophic and heterotrophic dinoflagellates are able to feed on, feeding mechanisms, growth and ingestion rates of dinoflagellates, grazing impact by dinoflagellate predators on natural prey populations, predators on dinoflagellates, and red tides dominated by dinoflagellates. Based on this information, we suggested a new marine planktonic food web focusing on mixotrophic and heterotrophic dinoflagellates and provided an insight on the roles of dinoflagellates in the food web.