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Seasonal and diurnal variation of hydrobiological characters of coastal water of Chennai (Madras), Bay of Bengal

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Title Seasonal and diurnal variation of hydrobiological characters of coastal water of Chennai (Madras), Bay of Bengal
 
Creator Subramanian, B
Mahadevan, A
 
Description 429-433
Seasonal and
diurnal variations in the hydrobiological characters of coastal water of
southern Chennai, Bay of Bengal were studied.
Parameters such as current, pH, salinity, inorganic nutrients,
(NH4, NO2, NO3, PO4, SiO3-
SiO2) and heavy metals exhibited unimodal oscillation and
temperature, dissolved oxygen (DO), biological oxygen demand (BOD) and
suspended solids exhibited bimodal oscillation. Particulate organic carbon (POC)
was positively correlated with suspended solids. Chlorophyll-a (chl-a)
and phytoplankton density

showed two
maxima; one in summer and another in southwest monsoon season and minimum value
during the northeast monsoon. Productivity was low in northeast monsoon
compared with other seasons. Temperature, dissolved oxygen (DO), chlorophyll-a
(chl-a) and productivity increased in the day time and vice versa for
inorganic nutrients. Low tide brought more nutrients and less saline water from
the estuarine region; high tide brought more chl-a from the offshore
water. All the parameters were highly influenced by monsoonal rain,

littoral drift and land
drainage in a season but diurnal variation was due to the combination of more
than one factors.
 
Date 2014-01-15T10:05:06Z
2014-01-15T10:05:06Z
1999-12
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/25720
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.28(4) [December 1999]