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تقييم حالة النباتات المائية الغاطسة في بعض مناطق هور شرق الحمار وشط العرب جنوبي العراق باستخدام بعض دلائل التنوع الاحيائي == Assessment of the Status of Submerged Aquatic Plants in Some Areas of East Hammar Marsh and Shatt Al - Arab River Southern Iraq Using Some Biodiversity Indices

Author name: سما عباس عبد المجيد الزيدي
Supervisor name: دنيا علي حسين العباوي
General topic: Biology
Specific topic: Aquatic Environment
Degree: Master
University: University Of Basrah - College Of Education For Pure Sciences
Language: Arabic
University location: Basrah
First pages:
Abstract: This study was conducted to assess the state of submerged aquatic plants in some areas of East Hammar marsh and Shatt al - Arab River, as measured by some of the chemical and physical properties of water and sediment in six stations, three of which are located in East Hammar marsh (Nagara, Sallal and Almshab) and the other three are located in the Shatt al - Arab (the island Muhammadiyah, Salhiya and Mhella). Environmental surveys of submerged aquatic plants were done and registered their presence, their vegetation cover and biomass as well as the biodiversity indices (diversity and evenness, and dominance) for 12 months from October 2015 until September 2016.The air temperature in the East Hammar marsh ranged between 19 - 45.3 C, water temperature 14.3 - 32.4C , transparency between 20 - 100cm , Turbidity between 20.9 - 65.3 NTU, depth of 50 - 160 cm and dissolved oxygen between 5.4 - 6.9 mg / L, pH between 7.6 - 8.6 , electrical conductivity between 3.8 - 12.5 mS / cm, nitrates between102.23 - 549.64 μg/L, effective phosphorus between 4.15 - 9.6 μg/L . As for the Shatt al - Arab River values ranged : air temperature between 18 - 48 C , water temperature was between 14.2 - 32.3 , Transparency between 23 - 90 cm, turbidity between 12.8 - 68.3 NTU , depth of 60 - 200 cm , dissolved oxygen between 5.4 - 7.9 mg / L , pH between 7.5 - 8.51 , electrical conductivity between 2.8 - 12.4 mS / cm , nitrates between 106.17 - 569.42 μg/L, effective phosphorus between 4.93 - 9.13 μg /L .BpH and electrical conductivity values of the sediments in the Shatt al - Arab and East Hammar marsh were reached 7.7 - 8.3 and 1.08 - 2.91 mS / cm and 7.5 - 8.4 and 1.12 to 3.05 mS / cm respectively, effective phosphorus values in sediment ranged in sediment of East Hammar marsh between 5.69 - 42.51μg/L, While in Shatt al - Arab fluctuated between 5.12 - 40.3 μg/L, and the value of the organic matter in the Shatt al - Arab were 5.6 to 14.5%, while in the East Hammar marsh reached 7.4 - 15%. The sediments are similar texture in the Shatt al - Arab and East Hammar marsh (Silty clay).The presence of three species were recorded in the Shatt al - Arab River included Potamogeton crispus , Potamogeton pectinatus and Potamogeton perfoliatus, while five species in the East Hammar marsh Ceratophyllum demersum, Myriophyllun spicatum , Potamogeton crispus , Potamogeton pectinatus and Potamogeton perfoliatus.As calculated biodiversity evidence was that East Hammar marsh was more diverse than the Shatt al - Arab, while dominancy was clear in the Shatt al - Arab, compared with East Hammar marsh.This study showed that the sudden rise in salinity values as well as increased nutrients led to degradation of water quality, which was reflected on the presence and vegetation cover of submerged aquatic plants as well as biodiversity resulting from the presence of Tilapia and other fish that use submerged aquatic plants as food as well as the human factor.