Lake 2010: Wetlands, Biodiversity and Climate Change
AQUATIC MACROINVERTEBRATE DIVERSITY AND WATER QUALITY OF BANGALORE LAKES
C.Balachandran and T.V.Ramachandra Energy and Wetland Research Group, Centre for Ecological Sciences, Indian Institute of Science, Bangalore-560 012. Email:
[email protected],
[email protected]
______________________________________________________________________________ Abstract: Aquatic macroinvertebrates play a significant role in the food chain of an ecosystem. Macroinvertebrates are being used to evaluate in fresh water quality assessment. This helps in identifying the environmental stress resulting from a variety of anthropogenic disturbances. This study focuses on aquatic macroinvertebrates through species assemblages in nine lakes (Anchepalya, Lakkennahalli, Yellamallappa, Varthur, Bellandur, Chikkabanavara, Abbigere, kommagondanahalli, and Malsandra) of Bangalore and also examines the influence of environmental factors on macro-invertebrates community. A total of 1055 individuals belonging to the 17 families of macroinvertebrates were collected during the sampling period (August and September, 2010), and the most dominant taxa were Chironomidae (43.6% of total animal abundance) followed by Baetidae (24.5%), Corixidae (14.7%), Naucoridae (5.3%), Gyrinidae (2.7), Carideae (1.8%), Belostomatidae (1.4%) and other families of each group have less than 1%.
The Shannon diversity indices value was found between 0.67 (Bellandur lake)and
1.77(Yellamallappa lake). The result of R2 value, Libellulidae family species, Total dissolved solids and Electrical conductivity were significant variables, accounting for 56% and 48% at P
