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Distribution of phytoplankton along an environmental gradient off Kakinada, East Coast of India

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Title Distribution of phytoplankton along an environmental gradient off Kakinada, East Coast of India
 
Creator Ayajuddin, M.
Pandiyarajan, R. S.
Ansari, Z. A.
 
Subject Kakinada
Phytoplankton
Distribution
Environmental gradient
Surface and subsurface water
 
Description 357-364
In the present study phytoplankton distribution and species composition
was examined on a salinity gradient from
River (R), River Mouth (RM) and coastal water (RF) at surface and subsurface
layers along the coast off Kakinada, East Coast of India. Average numerical
abundance of phytoplankton at R, RM and RF are 336 nos.mL-1, 150
nos.mL-1 and
169 nos.mL-1 respectively. Percentage contribution of each group of phytoplankton was in the order: Pinnate
diatoms > Cyanophyceans > Centrales
> Prasinophyceans. However, total phytoplankton species at surface and subsurface water at
all the stations showed presence of 52 and 24 species respectively. At the
group level, cyanophyceans were significant at RF locations. Pennate diatoms
were more at the remaining locations. Species Oscillatoria limosa was found to be abundant at both the surface
and subsurface water with 340 filaments.ml-1 and 488 filaments.mL-1
recpectively. Thalassiothrix longissima
was found to be maximum at surface water but absent in subsurface water. Wide
variation in evenness values (0.16-0.910) suggests uneven distribution of
species along the environmental gradient.
 
Date 2014-03-06T07:23:01Z
2014-03-06T07:23:01Z
2014-03
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/27340
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.43(3) [March 2014]