Abstract

A two-year (July 2021 - June 2023) study was done the physico-chemical parameters and zooplankton diversity of the Dholi Dhaja Dam in Surendranagar, Gujarat, India. To assess waterbody efficiency, various parameters were monitored, including pH, solids (total dissolved, total, and suspended), and oxygen levels (dissolved and biological oxygen demand). Water samples were collected from specific points, 21 distinct zooplankton species belonging to five taxonomic groups: Protozoa, Rotifera, Copepoda, Cladocera, and Ostracoda were identified from the selected study site. Significant positive correlations were observed between zooplankton diversity and both pH (r = .710**, p < .01) and BOD (r = .598**, p < .01). This suggests that increased alkalinity and nutrient richness in the water promote greater zooplankton diversity. These findings contribute to our understanding of Dholi Dhaja Dam's ecological status and the relationship between zooplankton and physico-chemical parameters of this study site.

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