Algal
diversity is the key parameter to determine the productivity nature of the pond.
The limnological survey and the algal diversities in the three Freshwater
pond Ecosystem in Thiruvannamalai Town, Thiruvannamalai. Tamilnadu has
undertaken during April 2000 to March2001.
Phytoplankton standing crop
formed two peaks in a year during June and December Lowest values were recorded
during rainy months due to rain water entry and unfavourable environmental
conditions prevailed in the period. The
division Cyanophyta registered maximum percent of species (43.90) and other
division followed by Chlorophyta (29.26), Bacillariophyta
(19.51) and Euglenophyta (7.31).
Phytoplankton diversity variation was regulated various physico-chemical
parameters and showed positive as well as negative correlations with themselves
and the phytoplankton diversity. Among
the environmental factors influencing the variation and abundance of
phytoplankton, water temperature plays a significant role in affecting the
growth of an organism. By multiple
correlation and regression analysis, it was found that 97.8% of the variations
in phytoplankton density was influenced by physico-chemical factors.
Address: Government Arts College,
Thiruvannamalai - 606 603, Tamil Nadu, India
E-mail: nrk57@rediffmail.com
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