Influence the amount of total organic matter (TOM)and Grain sediment on dispersal of Macrobenthic community in Western Haffar river in khoramshahr.

Subject Areas : environmental management

Zeynab Gholami ¹ ( MSc in Environmental Pollution, Science and Research Campus, Islamic Azad University, Ahwaz, Iran )
Seyed Mohammad Bagher Nabavi ² ( Assistant Professor, Department of Environment, Marine science and Technology University, Khoramshahr, Iran. )

Received: 2010-02-07 Accepted : 2010-09-18 Published : 2015-09-23

Keywords: Haffar River, Macrobenthic, Total Organic Matter, Grain Sediment Analyze,

Abstract :

Introduction: khoramshahr is located 128 kilometers far from Ahwaz and in southwestern ofkhouzestan. Karoon River before reaching the Persian Gulf, in khoramshahr Divided in to twobranches Bahmanshyr and Hafar. In to the importance of Hafar River Hydrology situation that freshwater and salt water are important Macrobenthic it will.Method: In this study selected 10 stations within the study scope. Sampling Started on March 2008and ended on September of 2009. Samples by Van Vienn Grab sampler (0.025 m2) in both warm andcold season and once in each season was done. To the 3 samples from each station to identify benthicsediment and one sample for Grain sediment Analysis (GSA) and Total organic materials (Tom) wereharvested. Physicochemical parameters of the DO, salinity, PH and temperature were analyzed.Results: Macrobenthic between groups identified the most abundant Insect group and sex Nereis sp.Identified Macrobenthic groups consist of Polychaete 65.19%, Gastropoda 29.65%, Bivalvia 4.97%and Insecta 0.18% respectively. In stations that the amount of material dissolved was high,macrobenthics was significantly redused. In station 1(Soap factory) and residual tissues silt clay andsand was fine to their numbers. Most the benthic communities in the river downstream stations wereobserved in the amount of organic matter in sediments of these stations are less. In general, benthiccommunities were more in sandy sediment with low organic matter.

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