“A STUDY ON SEASONAL VARIATION AND SPECIES COMPOSITION OF PHYTOPLANKTON IN BANSAGAR DAM”
DOI:
https://doi.org/10.53555/jaz.v46i2.5258Keywords:
eutrophication, abundance, Water diversion, disrupted breeding cycleAbstract
Hydrological changes and riverine fauna serve as key indicators of river health.
In India, the natural flow of rivers has been heavily modified by dams and water
diversions to meet agricultural and power demands, often neglecting the fisheries
sector. These alterations have degraded aquatic ecosystems, disrupted breeding cycles
of important species especially large carps and severely affected the livelihoods of river-
dependent communities.
The present study was carried out in the Bansagar Dam, Shahdol district,
Madhya Pradesh, India for Seasonal Variation and Species Composition of
Phytoplankton, in which it can be concluded that The phytoplankton community of
Bansagar Dam comprised four major groups Chlorophyceae, Bacillariophyceae,
Cyanophyceae, and Euglenophyceae with over 25 recorded species. Chlorophyceae
was the most dominant and species-rich group, peaking in summer (542 org/l) due to
favorable temperature and light conditions. Bacillariophyceae showed moderate
abundance, indicating good water quality, while Cyanophyceae increased in nutrient-
rich summer conditions, suggesting eutrophication trends. Euglenophyceae were least
abundant, occurring mainly in slightly polluted waters. Overall, phytoplankton diversity
and abundance were highest in summer and lowest in winter, indicating a mesotrophic
to slightly eutrophic nature of the Bansagar Dam ecosystem.
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Copyright (c) 2025 Baghel Sakharam, Kushwaha Kumar Santosh, Alone Kumar Mahendra
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