Abstract
The present paper is an attempt to prepare a check list of the algal diversity of India. It is largely based on the information available from published literature. Five main groups of algae, viz., Diatoms, Myxophyceae, Isokontae, Heterokontae and Rhodophyceae, have been studied by Mr.Abdul Majeed, Dr. S.L.Ghose and M.S.Randhawa in Northern India. Diatoms are very abundant during the winter months from the middle of November to the end of February. Synedra, Navicula, Cyclotella,Cocconeis and Gomphonema are commonly found in large numbers in stagnant or slowly-flowing sheets of water, free-floating, or attached to the rotting branches of water plants. The landscape of South India is dotted with innumerable man-made lakes. They differ vastly in age, physiography, water flow characteristics, chemistry and trophic state, yet maintain a phytoplankton overwhelmingly dominated (43-93%) by blue green algae; the subdominants are diatoms or Chlorococcales and Euglenoids. The lakes of Southern India have been investigated by Zafar(1966), Seenayya & Zafar (1979), Cynthia(1980), Khannum(1980), Mohan(1980), Rao(1980), Selvam(1981) & P.Manikya Reddy(2013). In the chemically more oligotrophic lakes, the peaks are constituted by Raphidiopsis mediterranea Skuja, Navicula cryptocephala Kutz., Melosira granulata ( Ehr. ) Ralfs, and others and in hypereutrophic lake by Microcystis aeruginosa Kutz., Synechocystis aquatilis Sauv., Oscillatoria spp., Burkillia coronate West & West and Euglena acus Ehr.