دراسة ادلة التنوع الاحيائي لتقييم مجتمع العوالق الحيوانية في نهر الكوفة - العراق == A Study of Biodiversity Indices To Assessment The Zooplankton Community In The Kuffa River - Iraq
Author name:
حسين عليوي حسن الكرعاوي
Supervisor name:
مهند رمزي نشات
General topic:
Biology
Specific topic:
Zoology - Invertebrates
Degree:
Doctorate
University:
University of Al-Qadisiyah - Faculty Of Education - Department Of Biology
Language:
Arabic
University location:
Qadisiyah
First pages:
24T2972 - p.pdf
Abstract:
اجريت هذه الدراسة على نهر الكوفة في وسط العراق والتي هدفت الى التعرف على التنوع الاحيائي للعوالق الحيوانية من خلال قيم بعض ادلة التنوع الاحيائي وكذلك والتعرف على نوعية المياه من خلال قياس بعض الخصائص الفيزيائية والكيميائية لمياه النهر وكذلك من خلال قيم دل | The Present study was carried out on the AL - Kuffa River in the middle of Iraq to know biodiversity of zooplankton by through some of biodiversity indices values and to know water quality by through measurement some physical and chemical characteristics of water as well as by through the Canadian Water Quality Index (CCME WQI) values. The samples of the study have been collected monthly for water and zooplankton for the period from March 2012 till February 2013 at four selected stations in the river; the first is located in Al - Kufel city, the second in Al - Kuffa city, the third in Aboskeer city and the four after Al - Mushkab city. The study was achieved by measurement of some physical and chemical properties of water were analyzed based on the importance of these parameters the parameters studied included Air temperature, water temperature, pH, water current velocity, turbidity, total suspended solids, electrical conductivity, salinity, total dissolved solids, dissolved oxygen, percentage of saturation, biological oxygen demand, total alkalinity, total hardness, calcium, magnesium, chloride, sulphat, phosphate and nitrate. The study also included biological aspects using density, Rrelative abundance index (Ra), Constancy index (S), Species richness index (D), Shanon - Weiner index (H), Species uniformity index (E) and Jaccard presence - community were also employed to determine the values of species composition, density and zooplankton biodiversity in the study area. The results showed clear consensus from air temperature and water temperature in all study locations.Air and water temperature ranged from 6 to 41 ?C and 7 to 34?C respectively, the Water current velocity values were fluctuated according to the different water levels during the study period and ranged from 0.19 to 0.71 m/sec, while the (TSS) values were low and ranged from 3.54 to 52.05 mg/l, and turbidity 1.69 to 55.76 NTU, the pH values were neutral tend to light alkaline and ranged was ranged from 7.1 to 8.7, The electrical conductivity values varied from 810 to 1810 ?s/cm, according to the values of salinity 0.51 to 1.158 ‰ the water of the river was classified as Oligohaline, (TDS) showed medium values ranged from 440.4 to 977 mg/l. This study showed that river were well oxygenated the dissolved oxygen values ranged from 5.5to12.2mg/l and high percentage of saturation recorded from 72 to 148 %, The study recorded values to the BOD5 were ranged from 0.9 to 6.4 mg/l.The study showed that the water of the river was classified as slight alkaline and bicarbonate ions were dominant throughout the study period according to the values of total alkalinity from110 to 210 mg CaCo3/l, and the river water classified as very hard according to the total hardness values from 237.9 to 538.2 mg CaCo3 /l., While the concentrations of calcium and magnesium were from 73.19 to134.1 and from10.46 to 55.59 mgCaCO3/L respectively, The chlorid and sulfate values were from117.6 to 244.5 mg/l and136.9 to 528.14mg/l respectively, The nutrients showed clear fluctuation in their concentrations, nitrate values were varied from 3.55to36.43?g/l and phosphate values were from 0.15 to 2.89 ?g/L.. In the current study about 164 Taxonomic units of zooplankton were identified, the rotifer was dominate group including 92 taxa to rotifera, 35 taxa belonging to cladocera and 37 taxa to copepod. The Zooplankton showed high density in river 29470 ind /m3 during April 2012 while lower1100 ind/m3 in December 2012 also the rotifer recorder density from 425 to 17925 ind/m3, cladocera density from 25 to 4850 ind/m3 and copepod density from 300 to 15450 ind/m3 the high values were in spring and autumn while lowest values were recorded in summer and winter. The results of relative abundance index showed that the species rotifera : Keratella cochlearis, K.valga, Euchlanis delatata while the cladocera Alona rectangular, Bosmina longirostris, Chydorus sphaericus, Simocephalus vetulus and the copepods : nauplii were more abundant in the kuffa river. also the results of Constancy index showed fourteen taxa belonged to zooplankton which were considered "Constant" at stations However the other taxonomy units varied from "accessory" and "accidental" taxonomy units in study stations he Values of the index of Species richness of Rotifer varied from 3.42 to18.26 and Cladocera varied from 0.9 to8.13 and Copepod from1.46 to 6.13 with greatest values were recorded in April While lower values in September and June The highest percentage of similarity 70.58% for Zooplankton were reported from stations 3 and 4 in and lowest similarity reaching 50.30% from stations 2 and 3. the Shanon - Weiner index of total Zooplankton varied from 1.81 to 4.13 bit/ind while the Shanon index of Rotifer from 1.85 to 3.78 bit/Ind, Cladocera varied from 0.001 to 3.03 bit/Ind and Copeoda varied from 0.35 to 2.71 bit/Ind with greatest values were recorded in April 2012 and September 2012 While lower values in and June 2012 and January 2013, The uniformity index of Rotifer varied from 0.01 to 0.9, Cladocera from 0.01to 1 and Copeoda from 0.14 to 0.88 These high values indicate that there is no ecological stress on zooplankton in the study area. The results of the Canadian Water Quality Index (CCME WQI) for aquatic life showed that the water quality of River Kuffa in the study area obtained good to marginal level (90.93 - 62.76) the highest value was recorded at station 1 through April 2012 and lowest value was recorded at station 2 through July 2012
