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Title: Occurrence of phytoplankton bloom and its effect on coastal water quality
Authors: Satpathy, K K
Nair, K V K
Issue Date: Jun-1996
Publisher: NISCAIR-CSIR, India
Abstract: An intense bloom of phytoplankton dominated by Asterionella glacialis was observed during the second week of May 1993 in the coastal waters of Kalpakkam. During this period a marked reduction in dissolved oxygen (1.2 mg/l) in the surface water was noticed. A decrease in nitrate and silicate and increase in phosphate levels were also observed. Asterionella glacialis contributed 66% (5.45 x 10(10) cells/m(3)) of total diatoms. Chlorophyll-a value was as high as 22.7 mu g/l. Substantial decrease in total viable count (TVC) was observed (1000 cfu/ml) and this coincided with the Ic west DO value observed during the investigation. Suspended matter (SM) value during the bloom period was as high as 131.5 mg/l. Changes in physico-chemical characteristics of the coastal waters associated with the occurrence of bloom are discussed.
Page(s): 145-147
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.25(2) [June 1996]

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