scholarly journals Grazing in the heterotrophic dinoflagellate Oxyrrhis marina: size selectivity and preference for calcified Emiliania huxleyi cells

1996 ◽  
Vol 10 ◽  
pp. 307-313 ◽  
Author(s):  
FC Hansen ◽  
HJ Witte ◽  
J Passarge
Keyword(s):  
Emiliania Huxleyi ◽  
Size Selectivity ◽  
Heterotrophic Dinoflagellate ◽  
Oxyrrhis Marina

scholarly journals Taxonomy and Physiology of Oxyrrhis marina and Oxyrrhis maritima in Korean Waters

Water ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2057
Author(s):  
Min Kyoung Jung ◽  
Tae Yeon Yin ◽  
Seung Joo Moon ◽  
Jaeyeon Park ◽  
Eun Young Yoon
Keyword(s):  
Coastal Waters ◽  
Phylogenetic Trees ◽  
High Salinity ◽  
Ssu Rdna ◽  
Heterotrophic Dinoflagellate ◽  
Korean Waters ◽  
Oxyrrhis Marina ◽  
Lipid Contents ◽  
High Lipid ◽  
Characterization Studies

The genus Oxyrrhis is a heterotrophic dinoflagellate found in diverse marine environments. Oxyrrhis spp. have received attention owing to their ecological and industrial importance, high lipid contents, and docosahexaenoic acid formation. To the best of our knowledge, contrary to O. marina, ecophysiological characterization studies on O. maritima have not yet been reported. Therefore, we investigated the taxonomy and ecophysiology of four strains of O. marina from coastal waters and two strains of O. maritima from the littoral tidepool waters of Korea. Based on phylogenetic trees constructed using internal transcribed spacer ribosomal DNA (ITS rDNA) and SSU rDNA of dinoflagellates, the clade of all four O. marina strains was divergent from that of the two O. maritima strains. We measured the growth rates of both species at various water temperatures (10–36 °C), salinities (5–90), and light intensities (0–100 µE·m−2·s−1). The lowest (O. marina and O. maritima: 10 °C) and highest temperatures (O. marina: <35 °C, O. maritima: >35 °C) revealed that O. maritima has more tolerance to high salinity. This study provides a basis for understanding the ecophysiology of O. marina and O. maritima and their population dynamics in marine ecosystems.

Saprophytic and phagocytic isolates of the colourless heterotrophic dinoflagellate Gyrodinium lebouriae Herdman

1977 ◽  
Vol 57 (2) ◽  
pp. 303-315 ◽  
Author(s):  
Robert Edward Lee
Keyword(s):  
Electron Microscope ◽  
Structural Level ◽  
Heterotrophic Dinoflagellate ◽  
Free Living ◽  
Oxyrrhis Marina ◽  
The Third ◽  
Show Evidence ◽  
Noctiluca Miliaris ◽  
Short Time ◽  
Comprehensive Study

Nutritionally, there are three basic types of Dinophyceae: (1) free-living photosynthetic autotrophs; (2) parasitic heterotrophs living on or in other organanisms and (3) free-living phagocytic or chemosynthetic heterotrophs. Representatives of the first type, the free-living photosynthetic autotrophic species, have been extensively investigated at the fine-structural level (for a review see Dodge, 1971). There are fewer species of the second type, the parasitic Dinophyceae, but many of these have been investigated in the electron microscope (Cachon & Cachon, 1966, 1970, 1971a, b; Cachon et al. 1968; Soyer, 1969 c; Manier, Fize & Grizel, 1971; Siebert & West, 1974). The third type, the free-living heterotrophic Dinophyceae, probably comprises the greatest number of species in the class; as Kofoid & Swezy (1921) state ‘One cannot work with the marine unarmored Dinoflagellata for even a short time without being struck by the fact that the majority of the individuals observed show evidence of holozoic nutrition and that the number actually containing chromatophores is relatively small throughout the entire Dinoflagella’. While the free-living heterotrophic Dinophyceae comprise the largest proportion of the class they have been, by far, the most poorly studied at the fine structural level. Investigations on these organisms have been limited to a comprehensive study of Oxyrrhis marina (Dodge & Crawford, 1971a, b, 1974) plus studies on specific parts of Cryptothecodinium cohnii (Kubai & Ris, 1969; Pokorny & Gold, 1973) and Noctiluca miliaris (Afzelius, 1963; Soyer, 1968, 1969a, b; Zingmark, 1970).

Dynamic stoichiometric response to food quality fluctuations in the heterotrophic dinoflagellate Oxyrrhis marina

2012 ◽  
Vol 159 (10) ◽  
pp. 2241-2248 ◽  
Author(s):  
Cédric Léo Meunier ◽  
Julia Haafke ◽  
Bettina Oppermann ◽  
Maarten Boersma ◽  
Arne Michael Malzahn
Keyword(s):  
Food Quality ◽  
Heterotrophic Dinoflagellate ◽  
Oxyrrhis Marina
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