UTTAR PRADESH JOURNAL OF ZOOLOGY

The primary objective of this research was to inventory the aquatic macrophyte species and assess important water quality indicators, including pH, dissolved oxygen, and temperature, in order to generate baseline information on the ecological condition of the tank. A total of 54 macrophyte species belonging to 45 genera were recorded during the study period. The dominant families were Poaceae representing 10 species. This is followed by Polygonaceae and Asteraceae each family represented by 6 species. The findings reveal a diverse assemblage of macrophytes, with species such as Eclipta prostrata, Eichhornia crassipes, Kyllinga brevifolia and Colocasia esculenta being particularly prominent. Overall, the measured water quality parameters remained within stable ranges, suggesting a functioning aquatic ecosystem. The characteristics of tank hydrology is regulated by the physico- chemical properties of water. Results show that increasing temperature value and rain water is favorable for growth and development of macrophytes. Lower turbidity enhances light availability, improves photosynthesis and generally indicates better water quality which support the healthy growth and development of macrophytes. Hydrogen ion concentration of water is considered as one of the important factors regulating aquatic ecosystem. Nevertheless, the study also identifies emerging concerns, including eutrophication and persistent human-induced disturbances, which pose significant threats to the long-term sustainability of the tank. In Joysagar Tank, various anthropogenic activities—such as the disposal of solid waste and plastics, discharge of restaurant waste, and recreational boating—have contributed to the degradation of the tank’s ecosystem. Although Joysagar Tank supports rich biodiversity, it is increasingly facing environmental challenges due to human interference. Therefore, the implementation of effective pollution-control measures, along with enhanced public awareness and community participation, is essential for the conservation and sustainable management of the tank’s ecosystem.