Document Type : Original Article

Authors

1 Department of Biology, Faculty of Biological ‎Sciences, Varamin -Pishva Branch, Islamic ‎Azad University, Varamin, Tehran, Iran.‎

2 Department of Plant Protection, Faculty of ‎Agriculture, Varamin-Pishva Branch, Islamic ‎Azad University, Varamin, Tehran, Iran. ‎

Abstract

Chironomidae flies (Insecta: Diptera) are known for their ecological importance; they are bio-indicator of aquatic ecosystems and play important roles in different levels of food chain. Although they serve as food supply for fish and others aquatic organisms, they are good predators of many Arthropoda species. The present study was conducted to investigate the chironomid variation in Lar River (Lar and Polour), eastern part of Tehran province, Iran through spring and summer 2014 in several replications. Shannon-Wiener and Simpson diversity indices were calculated for the sampling station separately. Sorenson`s coefficient was calculated to assess the similarity between the sampling areas. The results showed that there were a great variety of Chironomidae in Lar River composed of two sub-families and 6 different genus; Chironominae (Chironomus, Stictochironomus, Polypedilum, Endochironomus, Hyporhygma(andTanypodinae (Brundiniella) which 2 of them are recorded for the first time for Iranian fauna. Among the collected genera, Polypedilum was the most abundant genus especially in Lar station rather than Polour. According to the diversity indices, genera diversity in Polour station was higher than Lar.

Keywords

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