SEASONAL VARIATION IN DENSITY AND BIOMASS OF INSECTS IN NANDA DEVI BIOSPHERE RESERVE, INDIA

SEASONAL VARIATION IN DENSITY AND BIOMASS OF INSECTS IN NANDA DEVI BIOSPHERE RESERVE, INDIA

Kishor Kumar1, P. C. Joshi2, Ritesh Joshiand Manoj Arya4
1G.B. Pant Institute of Himalayan Environment and Development, Himachal Unit, Mohal-Kullu, 175 126, H.P
2Department of Zoology and Environmental Sciences, Gurukula Kangri Vishwavidayalaya, Hardwar, Uttarakhand, India
3Conservation and Survey Division, Ministry of Environment, Forests and Climate Change, Indira Paryavaran Bhawn, New Delhi
4Departments of Zoology, Kumaun University, Nainital, Uttarakhand
[Corresponding author E-mail1: kishorkkothari5@gmail.com]
Received: 06-10-2015 Accepted: 09-11-2015
Abstract:
The present study deals with the density, biomass and tropic composition of the insects in the Nanda Devi Biosphere Reserve, a world Heritage site in the West Himalaya, India. A total of 91 insect species belonging to 7 orders of 24 families were recorded during 2000-2002. The high density and biomass of insects was recorded during the rainy season, which may be due to the suitable weather conditions and maximum availability of food plants. Low density and biomass of insect was recorded during the winter season, which may be due the adverse climatic conditions (low temperature and snowfall) and scarcity of food plants in the high altitude biosphere reserve. Herbivorous insect species were the most abundant, followed by predators, parasites and saprophagous. The number of insects generally increases with rise in temperature.

Keywords: density, biomass, trophic composition, insects, Nanda Devi Biosphere Reserve

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