https://doi.org/10.51514/JSTR.6.4.2024.1-6
Monojit Ray, Suraj SK, Harish Chandra Joshi, Harshvradhan Pant and
Sandeep Negi
ABSTRACT
The present study deals with algal diversity of Tehari lake in relation with some important physico-chemical parameters and some inorganic nutrient ions. India’s highest artificial lake is Tehri lake situated over the lake Bhagirathi. The Tehri dam with a height of 855ft has enormous importance with respect to flood control, hydropower generation, drinking water supply and also for economy of local fishermen. The study was done during October 2023. Algae are one of the most important phytoplanktons consumed by fishes, crabs, snails etc. Present study conclude the lake water is very less polluted and had suitable aquatic environment. It was also observed that the lake water is highly alkaline and most of the algae identified belongs in Bacillariophyceae. Dominant species identified are Navicula, Nitzschia, Cymbella, Coscinodiscus, Pinnularia, Fragilaria, Tabellaria etc, Others species also identified belongs to Cyanophyceae, Chlorophyceae having species of Anabaena, Nostoc, Lyngbia, Oedogonium, Chlorococcum, Chlorella, Volvox etc salinity, TDS, conductance, hardness, biologically significant ions etc. are very low within the lake water; The lake water is ideal for the growth of Diatoms. These algae and diatoms are consumed by different fishes present in the lake. The water quality is significantly different and unique with respect to the other lakes of India. The lake water is very soft, almost chloride free and contains significant quantity of important inorganic nutrient ions such as carbonate, bicarbonate, sodium and calcium ions. Almost 25 algae are found in the Tehri lake.
Keywords: Limnolgical, Algae, Physico-chemical, inorganic ions, Diatoms etc.