Diversity of dragonfly and damselfly (Odonata) in some water springs in Magetan, East Java

Abstract

Pamungkas DW, Ridwan M. 2015. Diversity of dragonfly and damselfly (Odonata) in some water springs in Magetan, East Java. Pros Sem Nas Masy Biodiv Indon 1: 1295-1301. Dragonfly is an insect that plays an important role in the balance of the ecosystem, acting as predators. Most of Odonata’s life is in the water in form of larvae. Dragonfly occupies some specific habitat types of waters. This study aims to determine the diversity of dragonfly and damselfly (Odonata) in some water springs of Panekan sub- District, Magetan, East Java, with the assumption that the water source provides less pollutant. Expected specific species of dragonflies that occupy the habitat. The used method was the descriptive method by means of direct collection using insect nets to be identified. Collection sample used active exploration around the water spring to the vegetation formation. Based on the results, 19 species of Odonata was found including 10 species of (Anisoptera) and 9 species of damselflies (Zygoptera). Diversity index (H') of Odonata obtained 2,28 and relative abundance (KR) species Orthetrum sabina was the highest (29.4%), while the lowest was Orthetrum pruinosum (0.3%). Odonata including aggregated distribution, except for Diplacodes trivialis and Orthetrum pruinosum that had regular distribution.