Summary of Abstract Submission

Abstract Submission No. IO50-06-0010PresentationPoster

EFFECTS OF DEPOSITS DISTRIBUTION PATTERN ON SEDIMENT ORGANIC MATTER CHARACTERISTICS OF THE BAY OF BENGAL ALONG CHITTAGONG COAST, BANGLADESH

Avijit Talukder*1, Debbrota Mallick**2

1 Department of Marine Bioresources Science, FoF, CVASU, Bangladesh
2 Institute of Marine Sciences and Fisheries, CU, Bangladesh

ABSTRACT :

Sediment organic matter content, organic carbon and nutrients characteristics regulate the coastal biogeochemical cycle which have potential relevance with sediment particle size distribution. Present study reveals that distribution of deposits along the intertidal surface sediment act as a prominent factor on organic matter dissemination. Four sites allocated in freshwater zone whereas another four sites selected at seaside entitled as 15 No Ghat, Patenga, Khejurthali and Salimpur coast. Sediment samples were collected from two tide marks of each sites designated as highest high tide level (onshore) and lowest low tide level (offshore) of the intertidal zone during winter and monsoon of 2013 and 2014. Average organic matter content were found as 3.941.25%, 4.831.42% during monsoon in freshwater and marine sites correspondingly while in winter 2.441.23%, 5.062.38% observed in freshwater and marine sites in turn. Two way Anova, bivariate test and dendrogram denoted that organic matter and organic carbon have efficient relationship with weeny particles of sediment rather than coarse particles. Silt clay dominated coastal intertidal zones represent high organic matter content than sand dominated coast. Moreover, depositional pattern, sediment transport, erosion-accretion processes, tidal action, wave characteristics and seasonal inconstancy control the organic matter content in coastal belt. This research suggests the necessity of periodic observation to assess organic matter of deposits that control local geomorphology and biogeochemistry in Chittagong coast.