OCCURRENCE OF EUGLENOID RED BLOOM IN UTTANAHALLI LAKE WATER OF MYSORE, KARNATAKA STATE, INDIAB.N. NAGARATHNA AND S. LEELAVATHIAbstract Two years successive study (1998 - 2000) on Uttanahalli Lake, situated in Mysore, Karnataka State have been made. Occurrence of Euglenoid red bloom was noticed in Uttanahalli Lake, found in the margin of lake water during summer, March 2000. The bloom was confined to upper surface of the lake water. Physico-chemical characterstics of the lake water at the bloom site analysed. Physic() - chemical factors such as temperature, pH, dissolved oxygen, carbon dioxide, oxidisable organic matter: calcium, sodium, potassium, nitrates and phosphates showed maximum concentration at the bloom site. Apart from these factors high intervention of human activities in the particular month increasing the nutrients status of the lake was responsible for the formation of Euglenoid bloom. A total of 34 species of Euglenoids were recorded from the water body at the time of bloom.
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