Evaluation of Plankton Assemblage of Shanthisagara Lake Using Simpson and Shannon-Weiner Index

摘要

The present study focused on the community structure and diversity of phytoplankton species in Shanthisagara lake. In total five sampling sites (S_1,S_2, S_3, S_4 and S_5) were selected in a zigzag manner with corresponding GPS coordinates for plankton collection and analysis. Plankton samples showed 65 genera of phytoplankton to occur in the lake. Of which 26 belong to Bacillariophyceae, 25 belong to Chlorophyceae and 14 belong to Cyanophyceae family. Bacillariophyceae were found to be the most dominant group of phytoplankton in the study period. Plankton diversity was analyzed by different diversity indices. The Simpson index was found to be highest in S, (0.901) followed by S_4(0.891), S_1 (0.864), S_3 (0.862) and lowest at S_2(0.861). The Shannon-Weiner index (H) for phytoplankton was found to be the highest in S_5 with the index value of 2.393 followed by S_4(2.257), S_3 (2.072), S_1 (2.034) and S_2 (2.025).