International Journal of Fauna and Biological Studies
2016, Vol. 3 Issue 4, Part A
Primary productivity assessment at Dharapur area near to the channel Khonajan of Deepar beel (wetland) with reference to physicochemical parameters
Rabi Rajbongshi, Latashri Dutta and Parag Deka
The variation of primary productivity in terms of NPP and GPP along with CRV of water was studied at Dharapur area of Deepar Beel near to Khonajan, the channel connecting the beel with the river Brahmaputra. The adjoining area of the beel at the experimental site and the channel were observed to fill with domestic households and sometimes dumping of garbage was also observed near the experimental site from where effluents were observed to be entered through surface runoff water during heavy rains thus creating imbalance in the chemistry of water which affect the primary productivity. The high rainfall observed in March following a dry season in winter has elevated total alkalinity to 124 mg.l-1
and total hardness to 215 mg.l-1
along with organic matter. The rainfall creates dilution of water thus decreasing the phytoplankton density. Moreover high rainfall initiates influx of effluents and organic matter that increase the turbidity of water resisting sunrays to penetrate into the water which is evident in the present study where the value of GPP and NPP are observed to decrease from February to March. However, in other months, the gross primary productivity (GPP) of the experimental site is found to be higher than those of other lentic waters in India.
Pages: 11-14 | 1214 Views 132 Downloads
Rabi Rajbongshi, Latashri Dutta and Parag Deka. Primary productivity assessment at Dharapur area near to the channel Khonajan of Deepar beel (wetland) with reference to physicochemical parameters. Int. J. Fauna Biol. Stud. 2016;3(4):11-14.