Occurrence and germination of dinoflagellate cysts in surface sediments from the Red Sea off the coasts of Saudi Arabia

The distribution and abundance of dinoflagellate cyst assemblages were investigated in surface sediments from south-western Red sea coasts of Saudi Arabia at six sites during March 2010. A total of 19 taxa of dinoflagellate cysts were identified from all sites. The sampling sites showed a similar cy...

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Published in:Oceanologia 2011-01, Vol.53 (1), p.121-136
Main Authors: Mohamed, Zakaria A., Al-Shehri, Abdulrahman M.
Format: Article
Language:English
Subjects:
Alexandrium catenella
Cochlodinium
Cyst
Dinoflagellates
Dinophysis acuminata
Marine
Polykrikos
Prorocentrum minimum
Red Sea
Saudi Arabia
Scrippsiella trochoidea
Toxic species
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Al-Shehri, Abdulrahman M.
description The distribution and abundance of dinoflagellate cyst assemblages were investigated in surface sediments from south-western Red sea coasts of Saudi Arabia at six sites during March 2010. A total of 19 taxa of dinoflagellate cysts were identified from all sites. The sampling sites showed a similar cyst assemblage, but they differed in total cyst abundance (3 to 4083 cysts g−1 dry weight). Cyst abundance was strongly correlated with sediment characteristics, the highest numbers being recorded in sediments with large contents of organic carbon, silt and clay. Cyst assemblages were dominated by cysts of potentially toxic species, including Cochlodinium polykrikos, Prorocentrum minimum, Dinophysis acuminata, Alexandrium catenella and Scrippsiella trochoidea. Most cysts germinated successfully at different rates at 15 and 25° C. This study suggests that surface sediments from all Saudi Red Sea coasts should be monitored for the presence of dinoflagellate cysts to give ample warning of the presence and abundance of toxic species in a given area.
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source IngentaConnect Journals
subjects Alexandrium catenella
Cochlodinium
Cyst
Dinoflagellates
Dinophysis acuminata
Marine
Polykrikos
Prorocentrum minimum
Red Sea
Saudi Arabia
Scrippsiella trochoidea
Toxic species
title Occurrence and germination of dinoflagellate cysts in surface sediments from the Red Sea off the coasts of Saudi Arabia
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