Year: 2026 | Month: March | Volume 19 | Issue 1
Seasonal Variation in Zooplankton Population of Yamuna River at Delhi
Anand Kumar Dubey1* and I.R. Pathak2
DOI:10.30954/0974-1712.01.2026.5
Abstract:
Zooplanktons are microscopic free floating animals, play a vital role in aquatic ecosystem. Zooplanktons are highly sensitive to environmental variations, as a result change in abundance, species diversity or community composition can provide important indication of environmental health. Present investigation was conducted to study the relationship between seasonal variation and the diversity of zooplankton of river Yamuna in the stretch of Delhi. Zooplankton samples were collected for one year during Feb 2024 to Jan 2025 from three different Locations i,e. SW1-Near Wazirabad bridge (Upstream and entry point of Yamuna River in Delhi), SW2-Near ITO (Mid-stream and located in middle of stretch of Yamuna River in Delhi) and SW3-Near Okhla barrage From Kalindi kunj (Downstream and exit point of Yamuna River from Delhi). Zooplankton analysis was carried out during whole sampling period. Four groups of zooplanktons were reported i.e. Rotifers, Cladocera, Copepods and Ostracods. Among all the group of the zooplankton Rotifers were found to be most dominant at all location followed by Cladocera, Copepoda and Ostracoda. The overall population of zooplankton were recorded maximum during summer season followed by winter and lowest in the monsoon season.
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