IMPACT OF THARTHAR ARM WATER ON COMPOSITION AND DIVERSITY OF COPEPODA IN TIGRIS RIVER, NORTH OF BAGHDAD CITY, IRAQ

Bulletin of the Iraq Natural History Museum

Osama S. Majeed¹  Ahmed J. M. Al-Azaw²  Muhanned R. Nashaa³ 

[1] Directorate of Third Karkh, Ministry of Education, Baghdad, Iraq;department of Biology, College of Science, University of Baghdad, Baghdad, Iraq;ministry of Science and Technology, Baghdad, Iraq;

关键词: biodiversity;    copepoda;    river confluences;    tharthar arm;   

DOI  :  https://doi.org/10.26842/binhm.7.2021.16.4.0469

来源: DOAJ

【 摘 要 】

his study is considered to be the first on this sector of Tigris River after 2003, to evaluate the effect of Tharthar Arm on the composition and diversity of Copepoda in Tigris River. Six sampling sites were selected;two on the Tharthar Arm and four sites along the Tigris River, one before the confluence as a control site and the others downstream the confluence;thirty-five copepod taxa were recorded, 34 taxa in the Tigris River and 25 taxa in the Tharthar Arm.The highest density of Copepoda was 265584.2 Ind./m3 in the site 2 at Tharthar Arm lead to an increasing in Copepoda density in the Tigris River from 63878.2 Ind./m3 in site 1 before theconfluenceto127198.3 Ind./m3 insite4immediatelydownstreamtheconfluence.Also, themean values of richness index and diversity index increased from 1.71 and 0.98bit/Ind. in site1beforetheconfluenceto2.08and1.00bit/Ind.insite4belowtheconfluence, respectively.Moreover,thehighestsimilaritypercentagewasbetweensites3and4reached 87.83%while,thelowestpercentagewasbetweenthesites1and2recorded65.41%.For constancy index the highest value was 9 at the site 6 whereas the lowest value was 2 at site3.

【 授权许可】

Unknown