Environmental Biology Division, Department of PG studies and Research in Botany, Mahatma Gandhi College, Thiruvananthapuram-4 Phone: 9447558047
*E-mail: ajitanchal@gmail.com
Online published on 20 January, 2017.
The present study is to assess the distribution of phytoplankton and to determine the trophic state index of the reservoir using different algal indices. The study was conducted during March 2013 to February 2014. During this study a total of 25 algal genera belonging to class cyanophyceae, chlorophyceae and bacillariophyceae were recorded. The maximum genera were represented by bacillariophyceae followed by chlorophyceae and cyanophyceae. Different trophic indices like chlorophycean index, compound index and diatom index based on algal species were calculated. The algal indices state that most of the sites analysed were within the mesotrophic state and slightly eutrophic state. Hence it is time to take adequate measures to prevent the reservoir from eutrophication.
algal indices, eutrophication, reservoir, trophic state, water analysis
