Abstract
The bio-ecological conditions of a perennial piece of water, called Nuggikari lake in Dharwar, Mysore State, were investigated for one year from the view-point of regional limnology of South India. The lake is filled with rain water during the south-west monsoon and a part of the north-east monsoon season from a lateritic catchment area containing cultivated land. The inter-relationship existing between the physico-chemical variables and the biological conditions are discussed. The water is turbid and reddish during June to November when the majority of the algal organisms found is Chlorophyceae with a dominance of Desmids. Later, the water becomes pale-green to dark-green when blue-green algae become abundant in summer. The figures for albuminoid nitrogen and oxygen are then highest.
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