A study on organic production of Koromjol, Passur River System of
the Sundarbans was conducted from September 2008 to May 2009. The present study
deals with organic production, phytoplankton abundance and nutrients of
Koromjol in our sampling station, Koromjol, the values of gross and net primary
production were ranged from 18 to 146 and 15 to 86 mgC/m
$^3$
/L
respectively where maximum were recorded during winter and minimum at rainy season.
Supporting biomass and phytoplankton abundance were also given highest values at winter
and lowest during rainy season which makes the seasonal variation very signifi
cant. Phytoplankton taxa belonging to some major classes, i.e. Cephaladonia
sp., Coscinodiscus sp., Oscillatoria sp. and Melosira sp. were identifi ed. The
ojectives of this study are to determine the organic production, phytoplankton
abundance and chlorophyll-a with the nutrients of the Passur river.
