The lecturer in the Department of Ecology at the College of Science, Dr. Makiya Muhalhal Khalaf, participated in the discussion of the doctoral thesis by the student Hossam Muhammad Ashour, entitled (The effect of organic pollution on the phenomenon of divergence in two types of invertebrates in the Shatt al-Arab), which was organized by the Department of Fish and Marine Resources at the College of Agriculture at the University of Basra.