Author(s): Debansu Sekhar Pramanik, Swati Sucharita Mohanty

Abstract: Seasonal variation of primary productivity (Gross Primary Productivity and Net Primary Productivity) was measured from January 2010 to December 2011, for a period of two years at five stations along Chandipur, Bay of Bengal, Odisha. Gross and Net primary production were least (GPP =153.48 and 147.25, NPP = 106.36 and 99.57 gCm^-2d^-1) during winter season in both the years. Average value of Gross primary production ranged between 171.25gCm^-2d^-1 and 181.39gCm^-2d^-1. Community respiration was found to be lesser from December to February where as higher values were observed during March to May in 2010 and 2011. Analysis of variance showed significant differences within seasons (F = 38.04, P ≤ 0.01) in 2010 and (F = 13.18, P ≤ 0.01) 2011. Correlation coefficient and probable errors for both the productivity with hydrological parameters was estimated temporally and spatially and the result indicated that temperature and transparency were major determinants controlling rate of primary production.

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