Further, the Palmer’s (1969) index has no measure
for rating of the level of pollution in fresh waters
and a ranking technique is also essential to study
lake systems in order to compare them. It is also
necessary to understand whether the algae were
indigenous to the lakes or were brought into the
lake by human disturbances. The present work
discusses the possibility of using newer techniques
involving algae as indicators of organic pollution
based the Palmer’s (1969) index. The study
involves algae collected from 20 lakes of Mysore
district and its surroundings. (Fig.1) The collections
were made seasonally for a period of at least 10
years (2003 to 2013).