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Intense blooms of <i>Trichodesmium erythraeum</i> (Cyanophyta) in the open waters along east coast of India

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Title Intense blooms of Trichodesmium erythraeum (Cyanophyta) in the open waters along east coast of India
 
Creator Jyothibabu, R.
Madhu, N. V.
Murukesh, Nuncio
Haridas, P. C.
Nair, K. K.C.
Venugopal, P.
 
Subject Bay of Bengal
bloom
nutrients
chlorophyll a
primary production
 
Description 165-167
Two blooms of Trichodesmium erythraeum were observed during April 2001, in the open waters of Bay of Bengal and this is the first report from this region. The locations of the bloom were off Karaikkal (10°58N, 81°50E) and off south of Calcutta (19° 44N, 89° 04), both along east coast of India. Nutrients (nitrate, phosphate, silicate) concentration in the upper 30 m of the water column showed very low values. High-integrated primary production (Bloom 1- 2160 mgC m-2 d-1, Bloom 2-1740 mgC m-2 d-1) was obtained in these regions, which indicated the enhancement of primary production in the earlier stages of the bloom. Very low NO3-N concentrations, brownish yellow bloom colour, undisturbed patches and high primary production strongly suggested that the blooms were in the growth phase. Low mesozooplankton biomass was found in both locations and was dominated by copepods followed by chaetognaths.
 
Date 2009-05-22T08:47:39Z
2009-05-22T08:47:39Z
2003-06
 
Type Article
 
Identifier 0379-5136
http://hdl.handle.net/123456789/4262
 
Language en_US
 
Publisher CSIR
 
Source IJMS Vol.32(2) [June 2003]