IMPACT ASSESSMENT OF DRAGONFLY DIVERSITY IN DIFFERENT WETLAND ECOSYSTEMS IN COIMBATORE WITH SPECIAL REFERENCE TO ABIOTIC FACTORS

Abstract: Coimbatore district possess many wetlands, amongst them Singanallur, Sulur, Kumarasamy and Narasampathy were selected for the present study. Physico-chemical parameters of the waters for four selected wetlands were carried out and it revealed that Singanallur and Sulur wetlands were highly polluted as it possessed the ranges beyond the permissible limits of WHO. Since dragonflies are the indicator and flagship species of the wetland ecosystem the diversity of dragonflies were analyzed with special reference to water quality parameters of the selected wetlands. According to the survey, totally 11 species of dragonfly, belonging to two families (Libellulidae and Aeshnidae) were identified. Among the selected four wetlands the diversity of dragonflies was high in Sulur and Singanallur where the pollution level was also high. The present study clearly indicated that the diversity of dragonflies was not dependent upon the water characters but vegetation (aquatic and marginal) could have influenced their abundance in these wetlands.

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[Pushparaj Karthika and Natraj Krishnaveni (2014); IMPACT ASSESSMENT OF DRAGONFLY DIVERSITY IN DIFFERENT WETLAND ECOSYSTEMS IN COIMBATORE WITH SPECIAL REFERENCE TO ABIOTIC FACTORS Int. J. of Adv. Res. 2 (2). 0] (ISSN 2320-5407). www.journalijar.com

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