Summary of Abstract Submission

Abstract Submission No. IO50-03-0014PresentationPoster

ECOLOGY OF SOFT BOTTOM MEIOBENTHIC COMMUNITY FROM ESTUARINE HABITAT OF INDIAN SUNDARBANS: A CASE STUDY

Moumita Ghosh*1, Sumit Mandal1, Meenakshi Chatterjee2

1 Presidency University, Kolkata, India
2 Basanti Devi College, Kolkata, India

ABSTRACT :

Structural diversity of meiobenthos emphasizing on free-living marine nematodes were investigated from the Sundarbans Estuarine System (SES). Sediment and bottom water samples were collected from sub tidal region selecting fifteen stations (starting from Raidighi towards Bay of Bengal) across the salinity gradient in July, 2014. A total six meiobenthic taxa were identified and numerically dominated by free-living nematodes contributing 71% followed by harpacticoid copepod (25%). Meiobenthic density ranged between 64 2305 ind. 10 cm-2. Highest nematode communities were recorded at station 13 (1744 ind. 10 cm-2), corresponding to the silt fraction of sediment texture. Total 35 species of free-living nematodes were recognized. Pollution indicator nematode species Sabatieria spp., Daptonema sp. and Theristus sp. were the most abundant among all the stations. Shannon diversity index (H') ranged between 0.82 1.26 in meiobenthic communities. Bray- Curtis cluster analysis based on total fauna delineated two major groups and two separate stations. SIMPER analysis showed that free-living nematode community contributed 90% in meiobenthic cluster formation. Therefore, the present study suggests that biotic and abiotic environmental factors play a crucial role in structuring the benthic community.