Effects of meteorological conditions on the occurrence of cochlodinium polykrikoides and pyrodinium bahamense var. compressum in coastal waters of Kota Kinabalu, Sabah, Malaysia

Normawaty.S.M. Mohammad-Noor, and Encik Weliyadi Encik Anwar, and Aung Than Tin , and Aimimuliani Adam, and Dayang Siti Maryam Hanan, (2014) Effects of meteorological conditions on the occurrence of cochlodinium polykrikoides and pyrodinium bahamense var. compressum in coastal waters of Kota Kinabalu, Sabah, Malaysia. Sains Malaysiana, 43 (1). pp. 21-29. ISSN 1266039

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Abstract

In the Kota Kinabalu coastal area, the episodic occurrences of harmful algal bloom (HAB) species had been reported more than a decade ago. But, the time of the occurrence and factors contributing to the occurrence are still inadequately understood. To fill the gap, a study using 4 years field data from 2007 to 2010 was conducted. Cell densities of two HAB species, physicochemical parameters such as temperature, salinity, pH and dissolved oxygen together with rainfall data, wind data and general influence of ENSO episodes were taken into account to identify the most probable factors that trigger the occurrence of HAB species in the Kota Kinabalu coastal waters. From the analysis, C. polykrikoides blooms after 1 to 2 days of rain and significantly high nutrient concentrations were recorded during the blooms. Other physicochemical parameters were almost the same during the bloom and non-bloom events. Climate phenomena like ENSO (El Niño Southern Oscillation) affected the occurrence of P. bahamense var. compressum and C. polykrikoides. P. bahamense var. compressum occurred during El Niño due to high salinity and no blooms were recorded during La Niña. This indicates that unusual climate condition suppressed the bloom formation. The results gained from this study provide important information in managing HAB species particularly in the Kota Kinabalu coastal area. .

Item Type:Article
Uncontrolled Keywords:Algal blooms; El Niño phenomena; Meteorological data; Paralytic shellfish poisoning; Sabah
Subjects:T Technology > TD Environmental technology. Sanitary engineering
ID Code:9609
Deposited By:IR Admin
Deposited On:03 Mar 2015 14:31
Last Modified:03 Mar 2015 14:32

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