Limnological Variability and Zooplankton Dynamics in High-Altitude Lakes of Tawang District of Arunachal Pradesh, India
DOI:
https://doi.org/10.55863/ijees.2026.0951Keywords:
Ecosystem, High-altitude lakes, Limnology, Seasonal variations, ZooplanktonAbstract
High-altitude lakes (HALs) represent unique ecosystems characterized by extreme climatic conditions, including low temperatures, high ultraviolet radiation, and oligotrophic waters. This study investigates limnological variability and zooplankton dynamics in five selected HALs in the Tawang district of Arunachal Pradesh over 2 years (December 2020 to December 2022). Seasonal samplings revealed substantial fluctuations in water quality parameters like pH, dissolved oxygen, conductivity, and temperature. A total of 20 zooplankton species, belonging to Rotifera, Cladocera, Copepoda, and Ostracoda, were documented, with Rotifera being the most dominant. Seasonal variations were evident, with monsoon supporting the highest zooplankton diversity and abundance, whereas winter conditions significantly reduced zooplankton populations. Canonical Correspondence Analysis (CCA) highlighted strong correlations between zooplankton distribution and environmental factors like dissolved oxygen, alkalinity, and temperature. These findings provide critical insights into the ecological status and seasonal dynamics of HALs, offering valuable information for their conservation and management amid increasing environmental and anthropogenic pressures.
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