Author(s): Pragya Mehta, Gajender Singh, Ravikant, Ambrish Singh, Mohammad Nadim Ansari, Sudha Shahi, Shri Ram Yadav and Siddharth Kumar Jatav

Abstract: The study was carried out in the Ottu reservoir in Sirsa city of Haryana, India. Evaluation and quantification of phytoplankton of the Ottu reservoir were monitored from March 2021 to June 2021. The evaluation of the phytoplanktonic population revealed that there 19 genera of phytoplankton belong to class Bacillariophyceae (3 genera), Cyanophyceae (3 genera), Chlorophyceae (11 genera), Euglenophyceae (2 genera) In various months maximum, 123 species of phytoplankton were observed in site two and site 4, and Chlorophyceae found the as dominant group. The highest quantity of phytoplankton was observed in site two, while the minimum quantity was observed in site 3. Shannon and Weaver's diversity index for phytoplankton was found to be maximum in site 1(2.78) and minimum in site 4 (2.05). In site 1 and site 2 significant difference (p<0.05) was observed for the phytoplanktons groups present every month from March to June. However, a non-significant difference was observed in sites 3 and site 4.

DOI: 10.33545/26174693.2024.v8.i2Sd.562