Seasonal variations of phytoplanktonic community structure and production in relation to environmental factors of the southwest coastal waters of Bangladesh

Shah, Md Mahfuzur Rahman and Hossain, Md. Yeamin and Begum, Momtaz and Ahmed, Zoarder Faruque and Ohtomi, Jun and Rahman, Mohammad Mustafizur and Alam, Md Jahangir and Islam, Md Amirul and Fulanda, Bernerd (2008) Seasonal variations of phytoplanktonic community structure and production in relation to environmental factors of the southwest coastal waters of Bangladesh. Journal of Fisheries and Aquatic Science, 3 (2). pp. 102-113. ISSN 1816-4927

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Abstract

The present study was carried out to monitor the plankton community structure and productivity, its diurnal and seasonal variations and the influence of physico-chemical factors in the Shibsha River of the southwest coast of Bangladesh from July 2004 to June 2005. A total of 31 phytoplankton species were identified; 17 belong to Bacillariophyceae, seven to Cyanophyceae, five to Chlorophyceae and two to Dinophyceae. Bacillariophyceae appeared to be the dominant group in terms of total species and cell numbers during the period studied. The over all phytoplankton production was significantly (p< 0.05) higher in June (175.8x103 cells L-1) and lower in September (12.0x103 cells L-1) attributed to low temperature. Phytoplankton diversity declined to the lowest level in winter and there was a positive correlation with water temperature. The number of phytoplankton species was high (26) in June and quite low (11) in December. Nutrient concentrations including nitrate and phosphate were significantly (p< 0.05) higher in summer, while lower values recorded in winter. The lowest and highest concentration of Nitrate-Nitrogen (NO3-N) and Phosphate-Phosphorus (PO4-P) were 0.7, 0.3, 1.9 and 0.9 mg-1, respectively.

Item Type:	Article (Journal)
Additional Information:	6647/3373
Uncontrolled Keywords:	phytoplankton, production, southwest coast, Shibsha River, Bangladesh
Subjects:	S Agriculture > SH Aquaculture. Fisheries. Angling
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science > Institute of Oceanography and Maritime Studies
Depositing User:	Dr. Mohammad Mustafizur Rahman
Date Deposited:	10 May 2012 13:46
Last Modified:	10 May 2012 13:46
URI:	http://irep.iium.edu.my/id/eprint/3373

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