Eucampia zodiacus is a common marine centric diatom species. It is known to be cosmopolitan except in polar regions.[1] E. zodiacus is a harmful diatom that has become known as the predominant organisms causing the bleaching of aqua-cultured nori seaweed (Pyropia yezonesis).[2]
| Eucampia zodiacus | |
|---|---|
| |
| Eucampia zodiacus | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Clade: | Diaphoretickes |
| Clade: | SAR |
| Clade: | Stramenopiles |
| Phylum: | Gyrista |
| Subphylum: | Ochrophytina |
| Class: | Bacillariophyceae |
| Order: | Hemiaulales |
| Family: | Hemiaulaceae |
| Genus: | Eucampia |
| Species: | E. zodiacus
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| Binomial name | |
| Eucampia zodiacus Ehrenberg
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Description
editThe E. zodiacus cell has an average size between 10-61 μm along the apical axis.[3] The cell wall is silicified, as is characteristic of all diatoms. The thickness of this cell wall changes with season. Cells are flattened and interlock by two apical elevations (horns) to form long curved colony formations.[4] Consist of discoid plastids, bipolar frustules with elliptical valve face. Aperture shape is one of the identifying morphological features.[5]
Distribution
editEucampia zodiacus is very widely distributed in south temperate regions of warmer waters. It has been found to be abundant off southern California and common as far north as Alaska.[6] Since the mid 1990s E. zodiacus blooms have been frequently detected off the coast of Japan during winter months through early spring. This is a period of strong vertical mixing. Its blooms have caused the exhaustion of nutrients in the water column during the nori seaweed harvest season.[7]
References
edit- ^ Horner, Rita A. (2002). A taxonomic guide to some common marine phytoplankton (Repr. ed.). Bristol: Biopress. ISBN 0948737654.
- ^ Nishikawa, Tetsuya (2017). "Cell size reduction and restoration of the diatom Eucampia zodiacus in culture". Plankton & Benthos Research. 12 (2): 139–142. doi:10.3800/pbr.12.139.
- ^ Tomas, Carmelo R., ed. (1997). Identifying Marine Phytoplankton. Elsevier. doi:10.1016/b978-0-12-693018-4.x5000-9. ISBN 978-0-12-693018-4.
- ^ Lee, Jun Mo; Lee, Jin Hwan (2012). "Morphological study of the genus Ecumpia (Bacillariophyceae) in Korean coastal waters". Algae. 27 (4): 235–247. doi:10.4490/algae.2012.27.4.235.
- ^ Lee, Jun Mo; Lee, Jin Hwan (2012). "Morphological study of the genus Ecumpia (Bacillariophyceae) in Korean coastal waters". Algae. 27 (4): 235–247. doi:10.4490/algae.2012.27.4.235.
- ^ Cupp, Easter E. (1977). Marine plankton diatoms of the west coast of North America (Berkeley 1943. Repr. ed.). Koenigstein: Koeltz. ISBN 978-3874291255.
- ^ Nishikawa, Tetsuya (2017). "Cell size reduction and restoration of the diatom Eucampia zodiacus in culture". Plankton & Benthos Research. 12 (2): 139–142. doi:10.3800/pbr.12.139.
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