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Seasonal Variation of Environmental Properties and Phytoplankton Community in Al- Hussainya River, Holly Karbala - Iraq

Journal: Mesopotamia Environmental Journal (Vol.1, No. 1)

Publication Date:

Authors : ;

Page : 59-91

Keywords : water quality; phytoplankton; hussainia river; karbala; Iraq;

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Abstract

A comprehensive ecological study was conducted on Al-hussainya river during the period from October , 2012 To Septemper 2013 . This study includes measuring some chemical and physical properties of water , in addition to the study of Phytoplankton community quantitatively and qualitatively .The values of the parameters ranged between 12.7 – 31.3 C°, 8.5 – 45C° for water and air temperature respectively , 7.5 – 9.4 for PH , 840 – 1416.67 μs/cm , 413.33 – 700 mg/l , 6.33 – 55.07 mg / l , 0.54‰ – 0.91 ‰ for each of electrical conductivity (EC ) , Total dissolved solids (TDS) , Total suspended solids (TSS) and salinity respectively , 11.68 – 37.77 cm / sec. , 33.67 – 148.67 cm for each of water current velocity and water penetration respectively , 4.97 – 12.63 mg/l , 0.4 – 4.84 mg/l for dissolved oxygen (DO) and BOD5 respectively. Nutrients such as silica , total nitrogen and total phosphorous showed variation during this study , their values ranged between 1.63 – 6.26 mg / l , 1.4 – 3.5 mg/l and 1.33 – 17.29 μg/l for each of them respectively . A total of 242 taxa of phytoplankton identified during this study belonged to six classes of algae dominated by Bacillariophyceae which constitute 62.81 % of the total number of the species followed by Chlorophyceae by 20.66 % and Cyanophyceae by 11.16 % respectively . Dinophyceae and Euglenophyceae constitute the 2.07 % , while the the Cryptophyceae constitute the lower percentage which amounted to 1.24 % of the total species , some genera like as Nitzschia , Navicula , Cymbella , fragilaria , Scenedesmus and Oscillatoria were dominated by their species numbers in the Phytoplankton community .The total numbers of Phytoplankton cells ranged between (446.8 - 9177) × 103 cell / l recorded for March and October respectively .

Last modified: 2015-04-26 16:23:30