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كفاءة نبات البردي Pers. Typha domingensis والطحالب الملتصقة به في تحسين نوعية المياه في الجزء الجنوبي الشرقي من هور الحمار == Efficiency of Typha domingensis Pers. and Epiphytic algae for improving the water quality in South east Al - Hammar marsh
Author name:
ازهار مكي نزال
Supervisor name:
ازهار علي عبد الله الصابونجي | جبار خطار عبد الحسن
General topic:
Agricultural sciences
Specific topic:
Zoology - Fish And Marine Wealth
Degree:
Master
University:
University Of Basrah - Faculty Of Agriculture - Department Of Fish And Marine Wealth
Language:
Arabic
University location:
Basrah
First pages:
31T1755 - p.pdf
Abstract:
This study was conducted to evaluate the efficiency of aquatic plant Typha domingensis pers. and epipytic algae in improving the quality of water in South east Al - Hammar marsh. Four Stations were Selected , the first two stations are (AL - Mndhuri and AL - Daoudi) due to their location near and lack of vegetation, while the third and fourth stations Al - Zerki and AL - Burgah were selected Depending on the presence of high density of aquatic plants which dominated by T. domingensis , These are Al - Zerki and AL - Burgah. Water, aquatic plant and sediments samples were collected monthly from the selected stations from December 2014 until November 2015. Physical, Chemical and biological variables were measured, Air temperature was between (12.5 - 46.7)C◦ in Dec. and Aug. respectively, water temperature ranged between (11.2 - 42. 4) C◦ in Dec. and Aug. respectively, Salinity concentration ranged between (2.57) ‰ in Feb. and(6.59) ‰ in Sep. , Transparency at ranged between (42) cm in Jun and(74)cm in Dec. , Current velocity ranged between (0.26) m/sce in Feb. and( 0.59) m/sce in Aug. , pH was range between (5.7) in Jul. to(8.4) in Nov. , Dissolved oxygen ranged between (5.64) mg/l in May and(10.72) mg/l in Dec. , while the Biological Oxygen Demand was ranged between (0.72) mg/l in Nov. and(3.71) mg/l in Aug. , nitrate ranged between (2.61) μg/l in Apr. and(12.81) μg/l in Aug. ,while the reactive phosphate ranged from (0.27) μg/l in Sep. and( 0.93) μg/l in Aug. ,Total phosphorus ranged between (0.76) μg atom P/l in Jun and Oct. and(1.68) μg atom P/l in Aug. ,Chlorophyll a in water was ranged value between (4.11) μg/l in Feb. and(19.6 ) μg/l in Sep. ,Coliform of the study area at the ranged between (129) cell/100 ml in Nov. and(1800) cell/100 ml in Aug..Percentage of total nitrogen and total phosphate were determined in T.domingenesis, which collected from Al - Zerki and Al - Burgah stations, results showed that the Total nitrogen content of the aquatic plant which ranged between (1.02)% in Feb. and (2.89 (% in Sep. ,While the content of the aquatic plant of total phosphorus was ranged between(0.2)% in Feb. and (0.83)% in Sep. .As well as determined the Lead and Cadmium elements , as a dissolved part in water and exchangeable part in the sediments, as well as content in T.domingenesis. The concentrations of lead as dissolved part in water rangedBbetween( ( 0.86 μg/l in Jul. and ( 3.1 ) μg/l in Apr. , and in the exchangeable part of the sediment between ( 0.78 ) μg/g in Aug. and ( 2.41 ) μg/g in Apr. , while the content in T. domingenesis ranged between ( 0.38 ) μg/g dry weight in Jan. and ( 0.71 ) μg/g dry weight in Aug. ,Whereas cadmium as dissolved part in water ranged between ( 1.0 ) μg/l in Nov. and ( 2.8 ) μg/l in Apr. ,while in the exchangeable part of the sediment ranged between (0.6) μg/g in Apr. and (2.0) μg/g in Mar. ,and ranged in the T. domingenesis between (0. 3) μg/g dry weight in Jan. and(0.6) μg/g dry weight in Aug. ,The value of organic carbon in sediments ranged between (0.162)% in Nov. and(0.458)% in Jul. .Carlson Trophic State (CTSI) Index were used, based on three variables, namely chlorophyll - a - , total phosphorus and transparency to assess the nutritional status according to the primary productivity, Al - Mndhuri and Al - Daoudi stations were evaluated to be mesotrophic category values ranged between (41.42 - 46.68) for Al - Mndhuri station and between (45.63 - 40.44) for Al - Daoudi station during the months of August and October respectively. while Al - Zerki station were ranged between (42.55) during August which classified as mesotrophic, and 38.69 in February which classified as oligotrophic, AL - Burgah station were evaluated as oligotrophic and values ranged from 39.45 during January and 25.6 during October. The rate of trophic state index were 43.14 , 42.68 , 40.24 and 32.24 for four stations, respectively. Study areas marsh were classified as mesotrophic (39.57).Organic pollution index were measured depending on three variables, namely nitrates, phosphorus and biological oxygen demand to determine the levels of organic pollution for study stations, and to assess the general level of the study area, The values ranged (43.91 - 82.68) at Al - Mndhuri station during the months of May and August, while ranged between (37.65 - 75.76) during the months of November and August for the Al Daoudi station, and values for Al - Zerki station were ranged between (27.88 - 52.51) during the months of October and August respectively, while at AL - Burgah station were (24.60 - 39.22) during September and February.Al - Mndhuri and Al - Daoudi stations were classified in general to be Deteriorated, While stations Al - Zerki and AL - Burgah were classified as Medium, with an annual rate (52.81, 50.29, 38.57, 32.17) for the four stations, respectively. The lower values at Al - Zerki and AL - Burgah stations wasCassociated with decline in values of different factor that used for measuring OPI due to the presence of aquatic plant with high density which acting as filters for water contributed to the improvement of the environmental situation of the study area.Two Laboratory experiments for Free surfaces system static and recycling was done, both of which had lasted for eleven days to compare the efficiency between Epiphytic algae, and T.domingenesis in removing nutrients, which included nitrates and phosphates as well as the reduction of biological oxygen demand. The percentages of removal were calculated for each two days, also the total percentages of removal were calculated at the end of the experiment.Results showed that Epiphytic algae have higher efficiency in removing of nitrates, phosphorus and in reduction biological oxygen demand. than T.domingenesis and at both systems static and recycling. The total percentages of removing nitrate , phosphate and reduction in biological oxygen demand by epiphytic algae were (60.0, 52.91,60.0)% respectively, at the static system, and (68.84, 57.61 , 68.91 )%, respectively, using recycling system, while the total percentages reduction using the aquatic plant for nitrate ,phosphate and biological - oxygen demand were (39.9, 21.42, 63.64)%, respectively, using static system, and ( 48.12, 31.42, 72.87)% respectively, using recycling system. The results showed that the reduction of nutrient by using recycling system is higher than a static system .
