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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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        Abstract - Issue Jan 2014, 35 (1)                                                                                                             Back



nstantaneous and historical temperature effects on a-pinene

Impact of water quality on phytoplankton community and

biomass in Dhamara estuary east coast of India

 

Subrat Naik1, R.K. Mishra3*, Debasish Mahapatro2 and R.C. Panigrahy1

1Department of Marine Sciences, Berhampur University, Bhanjabihar-760 007, India

2Wetland Research and Training Center, Chilika Development Authority, Bhubaneswar-751 014, India?

3National Centre for Antarctic and Ocean Research, Headlanda Sada, Goa-403 804, India

*Corresponding Author E-mail: rajanimishra@yahoo.com

 

 

 

Publication Data

Paper received:

28 August 2012

 

Revised received:

18 January 2013

 

Accepted:

03 June 2013

 

 

Abstract

Distribution of phytoplankton, productivity and chlorophyll-a concentration in relation to physico-chemical parameters viz. water temperature, pH, total suspended solid, turbidity, dissolved oxygen, biochemical oxygen demand, salinity and nutrients (NO2-N, NO3-N, PO4-P and SiO4-Si) were studied for pre-monsoon, monsoon and post-monsoon during the year 2005. The major groups of phytoplankton species were diatoms followed by dinoflagellates and other algae. A total of 43 species of phytoplankton comprising 32 diatoms, 6 dinoflagellates and 5 other algae were recorded during the entire study period. The species Nitzschia, Chaetoceros and Coscinodiscus were identified as dominant diatoms group. Higher values of phytoplankton (28612 nos l-1) with high rate of photosynthesis were observed during post-monsoon season, which was responsible for increasing DO (8.72 mg l-1) and pH(8.24) of the water column. R-mode factor analysis revealed that there were two factors or PCs that explained 93.0%, 95.2% and 94.4% of the total variance for pre-monsoon, monsoon and post-monsoon respectively. Generally, the? trend distribution of phytoplankton closely followed the distribution of salinity, pH and DO of estuarine water.

 

 Key words

 

Chlorophyll-a, Dhamara estuary, Phytoplankton abundance, Water quality 

 

 

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