Relationship of fouling diatom number and chlorophyll-a value from Zuari estuary, Goa (west coast of India)
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The diatom cell biomass is expressed in terms of diatom number and chlorophyll -a value on panel of glass slide. The Chlorophyll value in a water body is indicative of the productivity. The present study was conducted to find out the relationship of cell biomass of fouling diatoms and the chlorophyll -a value observed over a period of 4 days of immersion of glass slide panel in 1 m depth in the estuarine environment in Zuari estuary. Generally. diatom number showed increasing trend from 1st to 4th day. Diatom number showed low values during monsoon and high during pre and post-monsoon months, highest number being shown during post-monsoon. Chlorophyll -a value was low during monsoon and pre-monsoon. High values of chlorophyll -a were recorded, although the diatom number was low, which may be due to the heavy deposition of Chlorella on glass slide. No direct relationship could be established between diatom number and chlorophyll-a value.
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