COMPARATIVE STUDY ON DISTRIBUTION OF PHYTOPLANKTONACCORDING TO SEASONAL VARIATION AT THANNAMUNAI AREAAND KALLADI BRIDGE AREA OF BATTICALOA LAGOON

Abstract

Phytoplankton fluctuation analyzed at two sampling regions namely Kalladi Bridge area (A)
and Thannamunai area (B) according to seasonal variation in the year 2015. The main study
focused on season rather that physio-chemical analysis. Samples were collected in dry (June)
and rainy (November) seasons. The sampling region B is comparatively has low salinity due to
the construction of two bridges (Koddaimunai Bridge & New Bridge) because the water flow is
highly restricted. The sampling region A is brackish water. During study period sea water
mixing doesn’t take place in dry season. During dry season species diversity was high rather
than rainy season and during dry season high density of Diatoms were estimated at the
sampling region B and high density of Cyanobacteria were estimated at the sampling region A.
During rainy season high density of Cyanobacteria and Chlorophycean members were
estimated both in the sampling regions A and B.