POPULATION DYNAMICS OF GREEN NOCTILUCA SCINTILLANS (DINOPHYCEAE) ASSOCIATED WITH THE MONSOON CYCLE IN THE UPPER GULF OF THAILAND(1)

© 2008 Phycological Society of America.

Bibliographische Detailangaben
Veröffentlicht in:Journal of phycology. - 1966. - 44(2008), 3 vom: 20. Juni, Seite 605-15
1. Verfasser: Sriwoon, Rujinard (VerfasserIn)
Weitere Verfasser: Pholpunthin, Pornsilp, Lirdwitayaprasit, Thaithaworn, Kishino, Motoaki, Furuya, Ken
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2008
Zugriff auf das übergeordnete Werk:Journal of phycology
Schlagworte:Journal Article Gulf of Thailand Noctiluca scintillans Pedinomonas noctilucae eutrophication green Noctiluca monsoon symbiosis
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520 |a Population dynamics of Noctiluca scintillans (Macartney) Kof. et Swezy containing the photosynthetic endosymbiont Pedinomonas noctilucae (Subrahman.) Sweeney was investigated in relation to environmental conditions in the upper Gulf of Thailand. A clear association was observed between the abundance of N. scintillans and the monsoon cycle, with its blooms occurring during the southwest (SW) monsoon from May to September, and low abundance during the northeast (NE) monsoon from November to February. Nutrient concentrations were higher during the SW monsoon than during the NE monsoon due to the combined effect of increased river discharge into the northern upper gulf and the transport of the riverine inputs by the prevailing clockwise circulation of the water. These nutrient conditions favored the growth of both phytoplankton and the endosymbiont. Correlation analysis revealed that the higher abundance of N. scintillans in the SW monsoon was manifested primarily by higher growth through both sexual and asexual reproduction supported by phagotrophy. However, the dependence of N. scintillans on the nutrient concentration was not significant, probably because the nutrient supply for the endosymbiont was sufficient due to intracellular accumulation of nutrients within the host cells. Sexual reproduction occurred only during the SW monsoon, and its potential importance in population growth was suggested. These findings showed the bottom-up control of the population dynamics of N. scintillans through growth of phytoplankton as prey. The seasonal shift in the circulation pattern associated with the monsoon cycle played a crucial role in blooming of N. scintillans by producing favorable food conditions 
650 4 |a Journal Article 
650 4 |a Gulf of Thailand 
650 4 |a Noctiluca scintillans 
650 4 |a Pedinomonas noctilucae 
650 4 |a eutrophication 
650 4 |a green Noctiluca 
650 4 |a monsoon 
650 4 |a symbiosis 
700 1 |a Pholpunthin, Pornsilp  |e verfasserin  |4 aut 
700 1 |a Lirdwitayaprasit, Thaithaworn  |e verfasserin  |4 aut 
700 1 |a Kishino, Motoaki  |e verfasserin  |4 aut 
700 1 |a Furuya, Ken  |e verfasserin  |4 aut 
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