In addition to PNSB, other anoxygenic phototrophic bacteria (APB)
were also observed; purple sulfur bacteria (PSB) and aerobic anoxygenic phototrophic bacteria
(AAPB) although most of them could not be identified. Among identified groups; AAPB, PSB
and PNSB in the samples of water and sediment were 25.71, 11.43 and 8.57%; and 27.78, 11.11
and 22.22%, respectively.