Mountains in the Chaning World, Mountains in the Chaning World

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Distribution of insect orders across elevational gradient in Shivapuri Nagarjun National Park
Bhumika Acharya, Susma Giri

Last modified: 2017-09-06



Insects are among the most successful groups of organisms on the earth. In context of Nepal, 5,175 species are enumerated till date where many more still await discovery. As ectotherms, insects cannot decouple their body temperatures from the environmental temperatures. Therefore, the distribution of insects highly depends on the surrounding temperatures and hence, varies with elevation and season. We collected insects from low- and high-elevation sites at an altitude of 1,693 masl and 2,100 masl respectively from May to August using bowl traps and net swipe approaches. A total of twelve insect orders were identified. Total count of insects varied significantly across elevation and months. Overall, Diptera was found to be the most dominant order at all sites and months followed by Hymenoptera and Coleoptera indicating that these three orders are most successful groups found in the study area.


Key words: order, bowl traps, Diptera, Hymenoptera, Coleoptera, dominant


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