• S.P. Purushotham
• N. Anupama

Water is among the most precious of natural resources available on our mother Earth. It is one of the most imperative natural assets for all life on earth. The present investigation is an effort to know the pollution freight through diatom as water pollution indicators, species diversity and their seasonal hesitancy in Madenahally and Honnayakanahalli lake ecosystems of Mandya District, Karnataka, India. Anthropogenic eutrophication, habitat demolition and water flow variations were the key stressors to freshwater, bullying the quality and availability of water and biodiversity. Results of the present study cautions the haphazard dumping and discharge of pollutants into the lakes which may lead to serious environmental deterioration which could be considered as a nascent source of hazard to biotic life. On the whole identified diatoms in two lakes were predicted as water quality indicators. Synedra ulna and Nitzschia microcephala were considered as the most frequent pollution indicators. Nitzschia microcephala proved as organic pollution indicator in both sites of Madenahally lake lacking anthropogenic pollution. In case of Honnayakanahalli lake organic pollution indicators did not exist in all the three sites but was loaded with Synedra ulna and Navicula minima causing anthropogenic pollution. Our findings tinted that diatom species diversity was rich in both the lakes and analysis of all the values obtained in each lake revealed that Madenahally lake was polluted by organic pollution whereas Honnayakanahalli lake was polluted by human activities.

Mandya, Madenahally lake, Honnayakanahalli lake, Nitzschia microcephala, Navicula minima, Synedra ulna.

"Multiplicity of Diatoms as Ecological Indicators of Madenahally Lake and Honnayakanahalli Lake of Mandya District, Karnataka, India ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.353-365, June 2019, Available :http://www.jetir.org/papers/JETIR1907938.pdf

"Multiplicity of Diatoms as Ecological Indicators of Madenahally Lake and Honnayakanahalli Lake of Mandya District, Karnataka, India ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp353-365, June 2019, Available at : http://www.jetir.org/papers/JETIR1907938.pdf