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Species resolution and global distribution of microreticulate dinoflagellate cysts


Bolch, CJS and Reynolds, MJ, Species resolution and global distribution of microreticulate dinoflagellate cysts, Journal of Plankton Research, 24, (6) pp. 565-578. ISSN 0142-7873 (2002) [Refereed Article]

DOI: doi:10.1093/plankt/24.6.565


The distribution, abundance and morphology of microreticulate dinoflagellate cysts were examined from samples collected from the coastal waters of Australia, the Baltic Sea, Italy, Hong Kong and Uruguay. On the basis of a combination of size range, variation in microreticulate pattern, and cyst wall colour, the three microreticulate species Gymnodinium catenatum (36-62 μm diameter), Gymnodinium nolleri (25-40 μm) and Gymnodinium microreticulatum (17-29 μm) could be distinguished. Only G. catenatum and G. microreticulatum were found at Australian sites. Gymnodinium microreticulatum was rare but widespread in sediments from Tasmania and temperate and tropical sites on mainland Australia, whereas G. catenatum was restricted to the eastern coast of Tasmania, southern Victoria, Port Lincoln [South Australia (SA)] and the Hawkesbury Estuary [New South Wales (NSW)]. Significant variation in G. catenatum mean cyst size was observed between sites, with mean diameters varying from 40.1 μm (Hawkesbury River, NSW) to 52.3 μm (Port Lincoln, SA). Laboratory experiments suggest that cyst size may be predominantly a genetically determined, population-specific character, rather than being influenced by environmental parameters. Using the species criteria refined from the dataset, existing reports of microreticulate cysts are re-examined, and the global distribution of microreticulate cyst species and the biogeography of the toxic dinoflagellate G. catenatum are re-evaluated.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Phycology (incl. marine grasses)
Objective Division:Environmental Management
Objective Group:Coastal and estuarine systems and management
Objective Field:Control of pests, diseases and exotic species in coastal and estuarine environments
UTAS Author:Bolch, CJS (Associate Professor Christopher Bolch)
UTAS Author:Reynolds, MJ (Mrs Marion Reynolds)
ID Code:24618
Year Published:2002
Web of Science® Times Cited:30
Deposited By:TAFI - Aquaculture
Deposited On:2002-08-01
Last Modified:2007-11-16

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