Journal of Environmental Biology

Studies on phytoplankton characteristics in Ayyampattinam
coast, India

Author Details

C. Santhosh Kumar

Centre of Advanced Study in Marine Biology, Faculty of Marine Sciences, Annamalai University, Parangipettai - 608502, India.

P. Perumal

(Corresponding author)

Department of Biotechnology, Periyar University, Salem ? 636 011, India.

e-mail ID:? perumaldr@gmail.com

Publication Data

Paper received:

25? September 2010

Revised received:

09? June 2011

Re-revised received:

18? July 2011

Accepted:

21 September 2011

Abstract

Physico-chemical variables in the marine environment are subjected to wide spatio?temporal variations. The various physico-chemical parameters viz: temperature, salinity, pH, dissolved oxygen and nutrients of the environment are the factors which mainly influence the production and successful propagation of planktonic life in the coastal biotopes. The ranges of values of surface water temperature (0?C), salinity (?), pH and dissolved oxygen (ml l^-1) were: 25.5 - 33.4; 23 - 35; 7.8 - 8.2; 3.6 - 5.2, respectively. The values (?g l^-1) of nutrients were: nitrate 3.21 - 6.34, nitrite 0.74 - 0.896, phosphate 0.22 and 1.16, silicate 24.85 - 61.92 and ammonia 0.05 - 0.32. The recorded values of primary productivity (mgcm^-3hr^-1) ranged between 16 ? 116 and the chlorophyll ?a? varied from 3.74 ? 8.52. A total number of 51 species of phytoplankton representing different classes viz: Bacillariophyceae (40); Dinophyceae (8); Chlorophyceae (1) and Cyanophyceae (2) was recorded. Among the four classes, Bacillariophyceae appeared to be the dominant group in respect of total species and cell numbers. The population density of phytoplankton was high during summer season and quite low during monsoon season.? ???

Key words

Physical parameters, Inorganic nutrients, Phytoplankton, Species diversity?

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