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Title: Monitoring the Diatom bloom of Leptocylindrus danicus (Cleve 1889, Bacillariophyceae) in the coastal waters of South Andaman Island
Authors: Karthik, R
Padmavati, G.
Elangovan, S. Sai
Sachithanandam, V.
Keywords: Phytoplankton;Leptocylindrus danicus;Bloom;Nutrient;Eutrophication;South Andaman Island
Issue Date: May-2017
Publisher: NISCAIR-CSIR, India
Abstract: Hydrographical parameters were studied and nutrients such as nitrate, nitrite, phosphate and silicate were measured. Temperature ranged from (24.5-27ºC), Salinity ranged from (19-25 psu). Nutrients such as nitrite varied between 0.23-1.009 µmol. l-1, nitrate (0.63-4.71 µmol. l-1), phosphate (0.02-0.23 µmol. l-1) and silicate concentrations remained much higher and exhibited between the ranges of 4.07-10.37 µmol. l-1. Biomass expressed in terms of chlorophyll a was high, ranged from 0.09-0.267µg. l-1. It was found out that an increase in the nutrient content has initiated the bloom. In the present investigation, following species of phytoplankton were found to be common; diatoms such as Bacteriastrum sp., Cerataulina sp., Chaetoceros sp., Corthron sp., Coscinodiscus sp., Guinardia sp., Odontella sp.,dinoflagellatessuch as Ceratium sp., Gonyaulax sp., Gymnodinium sp., Prorocentrum sp and Protoperidinium sp. An increase in rain fall (904.0 mm) during September 2012 due to south west monsoon which was also found to be major factor that contributed to the bloom.
Page(s): 958-965
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.46(05) [May 2017]

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