A Study on Community Structure and Abundance Macrobenthic of Khabr River (Kerman Province) in Different Seasons of a Year

Present study has been carried on Khabr river, Kerman province, during thirteen months , from February 2008 to February 2009. Eight stations were selected in 19 Kilometers distance of the river. Macro benthics were monthly collected at each station using a Surber with 1225 cm . Samples collected and fixed with formaldehyde 4%, in laboratory sorted and counted. Benthic data were summarized to some most popular Community Structure Metrics including TR(Total Richness), EPT index (total taxa belonging to three most intolerant insect orders Ephemeroptera, Plecoptera, Trichoptera), EPT/CHIR (ratio of EPT abundance to chironomidae .38 Genus of 27 family benthic Invertebrate were identified and were most aquatic insect larva. Overall average members had dominated order Ephemeroptera and Diptera in stations upper the river and Hirudinea in stations down the river . according to result community structure metrics macro benthics were maximum EPT in station 1(%91.32) and minimum EPT in station 7(%0.27) in winter .The results analysis of variance for benthic don’t show significant difference between stations (P≥0.05). The results showed that using macrobenthic community is economy and quick method for good assessment of pollution specifically have strictly in seasons polluted.