Microhabitat influence on diatom distributional pattern in diverse ecosystems
1Energy and Wetlands Research Group, Centre for Ecological Sciences [CES], Indian Institute of Science, Bangalore – 560012, India.
2Department of Botany, Yuvaraja’s College (Autonomous), University of Mysore, Mysore – 57005
*Corresponding author:


Macrophytes provide microhabitat for diatoms and also aid as biological filters as they uptake nutrients. We examined diatom community from submerged macrophytes in restored (Ulsoor and Kothanur) and unaltered (Ramasandra and Yelahanka) lakes of Bangalore urban region. We also collected diatoms from rock scrapings aiming to determine the importance of macrophytes for abundant species growth. Water samples were collected concurrently to analyze diatom environment relationship. Diatom taxa belonging to genus Nitzschia, Fragilaria, Staurosirella, Gomphonema, Cymbella, Cyclotella and Achnanthidium were recorded during the study period. Ulnaria ulna (Nitzsch) Lange-Bertalot dominated in Ulsoor lake while Staurosirella pinnata and Cyclotella meneghiniana structured diatom community of Yelahanka lake. Kommaghatta lake showed high species diversity (27 species) on macrophytes before restoration and low species diversity (13 species) in post-restoration sample due to lack in macrophyte availability in later sample. Even though, epiphyte (Eichornia crassipes) covered Yelahanka lake, diatom community structure revealed polluted water condition. This highlights diatom-habitat relationship with respect to water conditions. However, appropriate species of macrophytes are to be chosen while deciding management and restoration of lakes.

Keywords: Bangalore lakes, Biomonitoring, Restoration, Macrophytes

Citation : Alakananda B, Mahesh M.K. and Ramachandra. T.V, 2012. Microhabitat influence on diatom distributional pattern in diverse ecosystems., Proceedings of the LAKE 2012: National Conference on Conservation and Management of Wetland Ecosystems, 06th - 09th November 2012, School of Environmental Sciences, Mahatma Gandhi University, Kottayam, Kerala, pp. 1-7.
* Corresponding Author :
Dr. T.V. Ramachandra
Energy & Wetlands Research Group, Centre for Ecological Sciences, Indian Institute of Science, Bangalore – 560 012, India.
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