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

DRS at CSIR-National Institute of Oceanography

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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, N.
Haridas, P.
Nair, K.K.C.
Venugopal, P.
 
Subject algal bloom
Bay of Bengal
 
Description 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?58'N, 81?50'E) and off south of Calcutta (19? 44'N, 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 2006-09-20T11:17:17Z
2006-09-20T11:17:17Z
2003
 
Type Journal Article
 
Identifier Indian Journal of Marine Sciences, vol.32(2), 165-167p.
http://drs.nio.org/drs/handle/2264/412
 
Language en
 
Rights This digital version of the paper hosted with the permission from IJMS/NISCAIR.
http://www.niscair.res.in
 
Format 221001 bytes
application/pdf
 
Publisher NISCAIR, CSIR