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Synonym(s)
(Guiry and Guiry 2012)
Classification
(Guiry and Guiry 2012)
Lifestyle
Description
Margin
The outline or border that defines the shape of an organism or cell.
margins and extending out roughly perpendicularly to the chain (Cupp 1943). These spines are often covered in detritus. Terminal spines are smooth and not covered in small spines (Hasle and Syvertsen 1997). CloseAperture
"In some diatoms, the space between the valves of adjacent cells in chains" (Horner 2002).
Apertures are roughly elliptical with a slight constriction in the middle. One chloroplast per cell (Cupp 1943). Cells are yellow-brown in colour.Measurements
Apical
(axis, spine) The region of the apex or point. Refers to the most anterior point or region of the cell (HPP 2003).
(apical axis): 6 - 25 μm(Hasle and Syvertsen 1997)
Similar species
Harmful effects
Habitat
Distribution
Cosmopolitan (Hasle and Syvertsen 1997).
Forms blooms in austral summer (November) and fall (April - May) around Antarctica (Perissinotto 1992).
One of the dominant species in the summer in Saanich Inlet (Sancetta and Calvert 1988). Most abundant in spring and late summer off California (Cupp 1943).
Growth conditions
Environmental Ranges
Temperature range (°C): -1.697 - 29.468
Nitrate (μmol L-1): 0.056 - 18.784
Salinity: 30.920 - 35.801
Oxygen (mL L-1): 4.500 - 9.192
Phosphate (μmol L-1): 0.062 - 1.722
Close
Silicic acid
A general term to describe chemical compounds containing silicon, oxygen and hydrogen with a general formula of [SiOx(OH)4-2x]n. Diatoms polymerize silicic acid into biogenic silica to form their frustules (Azam and Chisholm 1976).
Silicate (μmol L-1): 0.754 - 34.819(OBIS 2012, cited in EOL 2012)
Bloom characteristics
References
Cupp, E. E. 1943. Marine Plankton Diatoms of the West Coast of North America. University of California Press. Berkeley, California. 238.
Encyclopedia of Life (EOL). 2012. Chaetoceros radicans. http://eol.org/pages/912020/overview. Accessed 31 Mar 2012.
Guiry, M. D. 2012. Chaetoceros radicans Schütt, 1895. http://www.marinespecies.org/aphia.php?p=taxdetails&id=163112. Accessed 31 Mar 2012.
Guiry, M. D. and Guiry, G. M. 2012. Chaetoceros radicans F. Schütt. http://www.algaebase.org/search/species/detail/?species_id=37456. Accessed 31 Mar 2012.
Hasle, G. R. and Syvertsen, E. E. 1997. Marine diatoms. In: Tomas, C. R. (ed.) Identifying Marine Phytoplankton. Academic Press, Inc., San Diego. 5-385.
Kraberg, A., Baumann, M. and Durselen, C. D. 2010. Coastal Phytoplankton: Photo Guide for Northern European Seas. Verlag Dr. Friedrich Pfeil, Munchen, Germany. 204.
Ocean Biogeographic Information System (OBIS). 2012. Chaetoceros radicans. http://www.iobis.org/mapper/?taxon_id=419688. Accessed 31 Mar 2012.
Perissinotto, R. 1992. Mesozooplankton size-selectivity and grazing impact on the phytoplankton community of the Prince Archipelago (Southern Ocean). Marine Ecology Progress Series. 79: 243-258.
Sancetta, C. and Calvert, S. E. 1988. The annual cycle of sedimentation in Saanich inlet, British Columbia: implications for the interpretation of diatom fossil assemblages. Deep Sea Research Part A. Oceanographic Research Papers. 35(1): 71-90.
Yoshida, Y., Mishima, Y. and Sato, M. 1998. Relationships between the dominant phytoplankton and DIN:DIP ratios in the inner part of Tokyo Bay. Nippon Suisan Gakkaishi. 64(2): 259-263.