Summary of Abstract Submission

Abstract Submission No. IO50-03-0025PresentationPoster

A COMPARATIVE APPROACH OF ASSESSING POLYCHAETE COMMUNITY STRUCTURE ALONG TWO OPPOSING COASTS OF GULF OF KACHCHH

Tejal Vilas Vijapure*1, Jyoti Tatoba Mulik1, Kalpna Chandel1, Soniya Sukumaran1

1 CSIR-National Institute of Oceanography, Regional Centre Mumbai., India

ABSTRACT :

Gulf of Kachchh (GoK) has developed into an industrial hub dominated by oil and gas production, refining and transportation facilities. Presence of MNPS (Marine National Park and Santuary) at its southern shoreline makes the region ecosensitive whereas the northern coast sustains large mangrove patches. Current study attempts to compare polychaete community structure and functional diversity coupled with hydro-sedimentological parameters at eleven stations each in two industrially active areas i.e Sikka and Kandla flanking south and north of GoK respectively. Overall, 27 polychaete families were recorded at Sikka dominated by Capitellidae whereas Kandla had 17 families with Nereidae as the abundant polychaete family. Cluster analyses demonstrated that the polychaete community structure of Sikka was distinctly different from that of Kandla. Observations on the trophic guilds indicated higher proportion of deposit feeders at Sikka (62.5%) and omnivores at Kandla (45.9%). Suspended solids in bottom water correlated negatively with all the univariate indices. Shannon diversity at Sikka [H(log2)=2.70.7] was significantly higher than that at Kandla [H(log2)=1.50.7] as indicated by ANOVA. Difference in substrata and profusion of suspended solids in the northern zone could be a main factor affecting polychaete community structure in the GoK.