Phytoplankton collection was carried out from
the Godavari river at Kopargaon for one year. Four
sampling sites were selected near the confluence of the
Godavari river and Gardi nallah. Two sites were located at
upstream of Gardi Nallah and two are downstream of
nallah. The monthly collection of phytoplankton from
selected sampling sites was carried out during the period
June 2017 to March 2018. Present studies revealed that a
total 38 species from 29 genera belonging to 4 class
namely as Chlorophyceae , Cyanophyceae,
Bacillariophyceae and Euglenophyceae were encountered
during the investigation period. Chlorophyceae was found
to be the dominant group. Many planktonic and epiphytic
algae were encountered during investigation period at four
sampling stations The commonly occurred genera were
Ankistrodesmus, Scenedesmus, Coelastrum ,Chlorella,
Tetrastrum, Crucigenia, Selanastrum. Bacillariophyceae
was second largest group encountered during study
period. This group comprised 16 species belonging to 10
genera. The commonly recorded genera of this class are
,Fragilara, Nitzschia, Navicula, Mastogloia and Synedra .
Cyanophyceae was represented by 4 genera and 4 species .
The recorded genera were Microcystis, Merismppedia
Oscillatoria and Chroococcus .Euglenophyceae was
represented by 2 genera i.e. Euglena and Phacus and 2
species. The downstream sampling stations shows
luxurious growth and population of phytoplankton as it
receives Sugarcane Factory effluents and domestic wastes
from that region .
Keywords : Phytoplankton, Confluence, Gardi Nallah, Godavar River, Kopargaon.