Diversity of Macrobenthic invertebrates at three stations from the middle part of Shatt Al-Arab River

The present study aimed at the community of macrobenthic invertebrates in three stations Shatt Al-Arab River, including Al-Muftia, Sendibad, and Al-Mohammadiat, samples were collected for a period six months, from July 2018 to December 2018, during which some environmental factors measured. invertebrate monthly replicates each station isolated identified, densities, relative abundance, ecological indices such as diversity, richness, evenness calculated. results showed that ranges measured water stations, general, follows: air temperature (26-39 ℃), (20-32 pH (7.1-8.1), electrical conductivity (5.1-10.7 mS/cm), dissolved oxygen (6.6-9.8 mg/L), calcium between (80.2-160.3 mg/L). During study, 12 species recorded, two belonged phylum Annelida, five Arthropods, Mollusca. highest density registered was recorded (944 ind/m2) Mohammadiat Melanoides tuberculata Mollusca, abundance groups Mollusca group amounted 95%.As diversity indices, value 1.42 September, richness 1.61 Sendibad November, 0.82 October.