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Title Odonata communities and habitat characteristics in Mount Kanlaon Natural Park, Negros Island, Philippines
Posted by Dennis Warguez
Authors Novehm Allen Pagal, Karyl Marie Dagoc, Dennis Warguez, Lisa Marie Paguntalan, Philip Godfrey Jakosalem, Reagan Villanueva
Publication date 2018
Journal Sylvatrop: The Technical Journal of Philippine Ecosystems and Natural Resources
Volume 28
Issue 1
Pages 49-72
Publisher Department of Environment and Natural Resources
Abstract A study on the diversity, abundance, and habitat preference of odonates on different habitat types and altitudinal gradients in Mount Kanlaon Natural Park was conducted from May 18 to June 2, 2015 using line transect, visual searching techniques aided by sweep nets, hand catching, and photo documentation. A total of 72 plots with a size of 10 x 10 m each was established in the study area for habitat assessment. Eleven species, in which 8 are Philippine endemics, were recorded. Highest diversity (H’=2.05) and endemicity (70%) were recorded in secondary lowland forest. Areas with low elevation had the highest species richness (S=10). Furthermore, all species found in high elevation were considered endemic. The Philippine endemic Cyrano unicolor was the most abundant species. Canonical Correspondence Analysis showed that height of understory level seems to influence the abundance of Drepanosticta cf. pistor, canopy cover and elevation might influence the abundance of Heteronaias heterodoxa, and stream depth might affect the abundance of Neurobasis subpicta. Multiple Regression Analysis identified water pH as an important factor influencing the occurrence of C. unicolor while occurrence of Risiocnemis rolandmuelleri might be dependent on tree density.
Index terms / Keywords Damselflies, dragonflies, habitat preferences, Mount Kanlaon National Park