Fathma Aliah Dimapinto, Olga M. Nuñeza, Reagan Joseph T. Villanueva
Department of Biological Sciences, Mindanao State University – Iligan Institute of Technology, Iligan City, 9200, Philippines
Forestal Healing Homes and Therapeutic Milieu, Forestal Road, Cabantian, Davao City, 8000 Philippines
Key words: Damselfly, Dragonfly, Ecological factors, Endemic, Indicator.
Odonata (dragonfly and damselfly) plays an important role in the ecosystem. It is considered an indicator group in determining fluvial habitat status. Field work in selected areas in Lanao del Sur was conducted to determine the Odonato fauna present in the area. Adult Odonata samples were collected using sweep netting and hand-picking methods from four sampling sites. Biodiversity indices, similarity index, and canonical correspondence analysis were determined using Paleontological Statistics Software Package (PAST) version 2.17c. Twenty-one species (10 damselflies and 11 dragonflies) were documented with relatively low endemism of 42.86%. High relative abundance of 37.28% was observed in site 4. Sites 1 and 3 were observed to have high species diversity while sites 2 and 4 had moderate species diversity. There was a more or less even species distribution in the areas sampled. Dominance of Pseudagrion pilidorsum pilidorsum was recorded in Marawi City. Canonical correspondence analysis showed that environmental factors such as elevation, air temperature and relative humidity affect the abundance of species. It appears that human-induced activities limit the occurrence and abundance of the Odonata, especially the endemic species.
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