International Journal For Multidisciplinary Research

E-ISSN: 2582-2160   •   Impact Factor: 9.24

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Volume 8 Issue 4
July-August 2026

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Seasonal Dynamics of Zooplankton Species Richness in Barur Lake, Krishnagiri District, Tamil Nadu, India

Author(s) Dr. VEENA SS
Country India
Abstract Zooplankton communities are widely recognized as sensitive indicators of ecological conditions in freshwater environments and play a significant role in assessing aquatic biodiversity. Among the available biodiversity indices, Margalef's Species Richness Index (Dmg) provides an effective measure of species richness relative to the total number of individuals recorded. The present investigation examined the seasonal variation in zooplankton diversity in Barur Lake, located in Krishnagiri District, Tamil Nadu, India, over a one-year period from January to December 2024. Monthly observations documented forty-nine zooplankton species comprising 19 species of Rotifera, 11 Cladocera, 12 Copepoda, and 7 Ostracoda. Rotifers remained the dominant group throughout the study. Species richness reached its highest level during the summer season, whereas relatively lower richness was observed during the monsoon, likely because of increased water volume, dilution effects, and turbidity. Seasonal changes in Margalef's Species Richness Index effectively reflected variations in zooplankton diversity and indicated that Barur Lake supports a moderately stable freshwater ecosystem capable of sustaining diverse aquatic communities. Continuous biodiversity monitoring using species richness indices can provide valuable scientific information for the conservation and sustainable management of freshwater ecosystems.
Keywords Margalef's Species Richness Index, Zooplankton Diversity, Freshwater Ecosystem, Seasonal Variation, Barur Lake, Krishnagiri District.
Field Biology > Zoology
Published In Volume 8, Issue 4, July-August 2026
Published On 2026-07-28
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E-ISSN 2582-2160
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CrossRef DOI prefix of IJFMR is 10.36948/ijfmr

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