Composition and Diversity of Dragonflies (Insecta: Odonata) in Tunan Waterfall Area, North Minahasa, North Sulawesi, Indonesia
Composition and Diversity of Dragonflies (Insecta: Odonata) in Tunan Waterfall Area, North Minahasa, North Sulawesi, Indonesia
Roni Koneri1*, Meis Nangoy2 and Pience V. Maabuat1
ABSTRACT
Dragonflies play an important role in an ecosystem and can serve as control agents of agricultural insect pests. Dragonflies can be used as bioindicators for evaluating environmental changes in long-term studies (biogeography) and short-term studies (conservation biology). This research study was aimed to analyse the composition and diversity of dragonflies in Tunan Waterfall area, North Sulawesi, Indonesia. Sampling was conducted from March 2018 to May 2018 at at three types of habitat, namely primary forest, secondary forest, and agricultural land. At each habitat type were laid four 300-metre-long transect lines. The lines were placed along the river of each habitat type, and sampling was carried out along the lines using sweep nets. From the research, 7 families, 20 species and 1,750 individuals belonging to 2 suborders, Anisoptera and Zygoptera, were identified. Libellulidae was the family with the most number of species and individuals being found. Th especies with the highest abundance was Orthetrum pruinosum, followed by Libellago xanthocyana. The highest dragonfly species abundance was found in the plantation land, while the lowest was found in the primary forest or around the waterfall. The highest dragonfly richness index, species diversity index (H’), and species evenness index were found in the secondary forest, followed by the primary forest. The diversity of dragonflies at the observation site was influenced by vegetation cover and temperature.
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December 2020
Vol. 52, Iss. 6, Pages 2027-2426
