Insect Diversity in Mangrove Communities in Small Islands of Wakatobi National Park, Southeast Sulawesi, Indonesia

Suriana -, Jamili -, Parakkasi -

Abstract


Insects play very important role in mangrove community as pollinators, predators, as well as prey. They also play role in the decomposition process,  cycles of matter and energy flow. The diversity of insects is related to the diversity of the mangrove community,  directly or indirectly.This study reveals the diversity of insects on mangrove communities in small islands national park Wakatobi, Southeast Sulawesi, Indonesia. We used line transects toward the shoreline crossing mangrove formation, up to mangrove formation that borderingwith land plants. In each  transect, several 10 x 10 m observations plots were laid according to the width of the mangrove communities. Insects were collected using insect nets, pitfall traps and leaf litter samples. Shannon Weiner index of diversity (H) was computed. The results showed variation in number of insects between islands. At Keledupa Island, there are 7 orders of insects that include 21 families and 39 genera.  At Lentea Island there are 5 orders, including 15 families and 28 genera. At Hoga island, there were only 4 orders, 8 families, and 13 genera. Among them, there were 19 species of arboreal insects, 21 species of soil insects and 5 species of aquatic insects. The dominant insects were Hymenoptera, with 11 species. The diversity index of insects was highest in Kaledupa Island (3.481), followed by Lentae Island (3.252), and Hoga island (2.44). The other significant finding of the study is that the saline water insect both Hemiptera and Diptera (brine flies) were recorded for the first time from Indonesia in the mangrove community of Kaledupa and Lentea Island.


Keywords


Mangrove; Small Islands; Arboreal Insect; Ground Insect; Aquatic Insect;, Diversity Index; Wakatobi National Park

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