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International Journal of Zoology and Applied Biosciences Research Article
Seasonal changes in zooplankton diversity and species richness in Kot dam of Jhunjhunu district, Rajasthan
Vipul Dev Beniwal, Rinku Kumari and Sushma Jain
Year : 2026 | Volume: 11 | Issue: 2 | Pages: 19-26
Received on: 29/12/2025
Revised on: 19/01/2026
Accepted on: 07/02/2026
Published on: 01/03/2026
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Vipul Dev Beniwal, Rinku Kumari and Sushma Jain ( 2026).
Seasonal changes in zooplankton diversity and species richness in Kot dam of Jhunjhunu district, Rajasthan
. International Journal of Zoology and Applied Biosciences, 11( 2), 19-26.
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Abstract
Study was conducted at three sampling sites of Kot Dam located in Jhunjhunu district, Shekhawati region of Rajasthan from April 2021 to March 2023 to assess seasonal variation in species richness and diversity of zooplankton. During study, 58 zooplankton species were observed at all three sampling stations in Kot Dam. Of the 58 zooplankton species, the maximum number of species belonged to the Cladocera (21 species) followed by rotifers (15 species), protozoans and copepods, with eight species each. Minimum number of species was observed in the ostracod group (six species). At sampling station I, highest number of species (58 species in each season) was observed in summer 2021, monsoon 2021 and winter 2021-22 followed by summer 2022 (57), winter 2022-23 (56) and lowest number of species was observed during the monsoon 2022 (49). At sampling station II, the highest number of species was observed in summer 2021 and winter 2022-23 (56 species in each season) followed by winter 2021-22 (55), summer 2022 (54), monsoon 2021 (51) and lowest number of species was observed in monsoon 2022 (49). At sampling station III, maximum number of species was observed in winter 2022-23 (57) followed by summer 2021, winter 2021-22, summer 2022 (56 species in each season). Simpson diversity index ranged between 0.9743 to 0.9795 for sampling station I, 0.9736 to 0.9784 for sampling station II, and 0.9749 to 0.9785 for sampling station III, respectively. Shannon diversity index ranged from 3.75 to 3.963 for sampling station I, 3.739 to 3.91 for sampling station II, and 3.791 to 3.917 for sampling station III. Zooplankton is crucial biotic organisms of aquatic ecosystems and is an important component of food chains and webs.
Keywords
Zooplankton, Kot Dam, Cladocera, Season, Diversity, Ecosystem, Food chain, Food web.
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© The Author(s) 2025. This article is published by International Journal of Zoology and Applied Biosciences under the terms of the Creative Commons Attribution 4.0 International License (creativecommons.org), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
