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Fine-scale responses of phytoplankton to freshwater influx in a tropical monsoonal estuary following the onset of southwest monsoon

DRS at CSIR-National Institute of Oceanography

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Title Fine-scale responses of phytoplankton to freshwater influx in a tropical monsoonal estuary following the onset of southwest monsoon
 
Creator Pednekar, S.M.
Matondkar, S.G.P.
Gomes, H.R.
Goes, J.I.
Parab, S.G.
Kerkar, V.
 
Subject phytoplankton
neritic species
dinoflagellate
tidal activity
 
Description In May of 2007, a study was initiated by the National Institute of Oceanography (NIO), Goa, India, to investigate the influence of monsoonal rainfall on hydrographic conditions in the Mandovi River of India. The study was undertaken at a location approx. 2 km upstream of the mouth of this estuary. During the premonsoon (PreM) in May, when circulation in the estuary was dominated by tidal activity, phytoplankton communities in the high saline (35–37 psu) waters at the study site were largely made up of the coastal neritic species Fragilaria oceanica, Ditylum brightwellii and Trichodesmium erythraeum. During the later part of the intermonsoon (InterM) phase, an abrupt decline in salinity led to a surge in phytoplankton biomass (Chlorophyll a approx.14 mg m sup (-3)), of a population that was dominated by Thalassiosira eccentricus. As the southwest monsoon (SWM) progressed and the estuary freshened salinity and Chlorophyll a (Chl a) concentrations decreased during the MoN, Skeletonema costatum established itself as the dominant form. Despite the low biomass (Chl a
 
Date 2011-07-29T10:07:17Z
2011-07-29T10:07:17Z
2011
 
Type Journal Article
 
Identifier Journal of Earth System Science, vol.120(3); 2011; 545–556
http://drs.nio.org/drs/handle/2264/3893
 
Language en
 
Rights Copyright [2011] Indian Academy of Sciences. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher Indian Academy of Sciences