دراسة آلية النمو الحركية للطحالب الملتصقه على مختلف المواد كوسط مساعد للنمو في نهر دجلة

Identified and studied the mechanism of growth kinetic for some types of algae stuck on different materials surfaces which sank in Tigris River as medium for growth such as awash surface for boats, aquatic plants, and clay . The results shown participation of the algae: Gyrosigma acumintum, Firgallares capucina var -valvaire, Diatoma elongatum and Oscillatoria sancta which were stuck on awash surfaces in the Tigris River. Results shown also the dominion of diatoms algae Bacillariophyce Class (Cymbella cistula, Diatoma elongatum, Firgallares capucina. var -valvaire, Melosira granulata. var.connective, and Nitzschia )which stuck on the awash surface of cane by 76.4% more than remnant of algae. The class of Cyanophycea (Oscillatoria sancta and Merismopedia glauca ) more dominion by 11.7% than remnant of algae. The class of Chlorophycea (Spirogyra borgeana) more dominion by 5.8% than remnant of algae. The characteristically of Penale's order algae dominion for growth by comparing with Centrals' order algae which consists of diatoms algae (Bacillariophyce class). The characteristic of cane more effect than clay and boats by adhesion of most algae on it during the period of growth on awash surfaces in Tigris River. The concentration value of ammonia and nitrate are 22.4 and 16.8 ppm respectively for test of the clay sample which assist for growth of algae such as Oscillatoria boryana and Oscillatoria sancta. The study identified 25 species for 18 genuses for different algae with dominion ability