An Environmental Study to Compare Biodiversity and Distribution for Rotifera Community on Different Sites of the Janabi River's in the Wasit Province, Iraq

Abstract

The qualitative and quantitative composition of the rotifera community was studied for four seasons of 2023 at three sites.Forty-seven Rotifera taxonomic units were identified. The total density ranged from 12463.6 to 3764.3 Ind./m3, whereas S3 was recorded as the lowest number of species, and this site was considered an area for discharging sewage with river water. The relative abundance, Shannon-Wiener coefficient ranged from 2.92-1.78bit/Ind, Uniformity of species index ranged from 0.96-0.57, species richness ranged from 6.21-3.08, and Jaccard index of similarity studied ranged from 55.98% -52.58%. Site 3 recorded a clear decrease was observed of the environmental indicators due to the influence of sewage water. Thus, the results showed a clear negative impact on the diversity of the rotifera community.