Abstract
A limnological investigation was carried out in Tropical Community Wetland, Kanewal, Gujarat, India from June 2007 to May 2008. Water quality parameters like temperature, pH, dissolved oxygen, secchi depth, total solids and total dissolved and suspended solids, free carbon dioxide, phenolphthalein alkalinity, total alkalinity, carbonates, bicarbonates, total hardness, calcium and magnesium hardness, chloride, phosphate, sulphate and nitrate and phytoplankton composition were investigated during the study period. Correlation coefficients were calculated among the various physicochemical variables and phytoplankton groups. Sulphate and nitrate both showed a positive correlation with phosphate. However, dissolved oxygen showed a negative correlation with phosphate, sulphate and nitrate at both the sites. Pearson Product Analysis for phytoplankton at the two sites was performed and it showed a high significance of Bacillariophyceae members between both the sites than other two groups. A total of 45 species were identified belonging to Cyanophyceae, Chlorophyceae and Bacillariophyceae but members of Euglenophyceae were found to be absent indicating a lesser degree of organic pollution. Moreover, species of Bacillariophyceae were recorded to be the most occurred group compared to others throughout the study which shows relatively unpolluted nature of wetland.
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