Diversity and distribution of true flies (Diptera) of Kuldiha Wildlife Sanctuary, Odisha, India: Functional roles based on ecological guilds

Abstract

Proper understanding of ecological dynamics of faunal components, whether it is a large mammal or a tiny insect of any ecosystem including forests, plays an important role in the eco-management of any eco-zone. Dipteran insects constituting a major faunal group among the entomo-diversity of any forest ecosystem portray significant functional roles in determining the stability in the ecosystem functioning of the respective ecosystem. The present paper has attempted to document the diversity of dipteran insects inhabiting a tropical deciduous forest of the extended part of Deccan Biogeographic Zone in the eastern part of India, the Kuldiha Wildlife Sanctuary alongside indicating its habitat preference and distribution patterns. A total of 34 species under 19 families of the order Diptera were recorded from different habitats of the studied forest areas, of which three species are considered new reports from the state of Odisha, India. Out of the three selected eco-zones, the deep forest area having a higher density of sal trees (Shorea robusta) revealed less species richness but high relative abundance, whereas the barren grazing land demonstrated higher species richness with low relative abundance. The eco-zone with wetlands and associated vegetation have shown moderate species richness and diversity of dipteran insects. Three contrasting seasons (pre-monsoon, monsoon, and post-monsoon) of this region have also demonstrated different patterns of diversity and density of this group of insects which have been segregatedinto several feeding guilds in tune with the seasonal availability of food resources.