Habitat Alterations in Tropical Forest and its Impact on Diversity of Birds in Northeast India
Anthropogenic activities on account of traditional practices are devastating natural forest in tropical countries.
The local government rehabilitates natural habitatsthrough monoculture plantations and altering their structure and
composition. This is affecting local biodiversity severely. A study was conducted in Sialsuk community reserve forest in
Mizoram, India. A natural forest and a plantation forest site was undertaken to assess this aspect on avian diversity.
Vegetation composition with 7 tree species, tree diversity, 0.04tree/m2, and tree diversity(H=0.708) at plantation site was
recorded very low. Natural forest had vegetation composition with 23tree species, diversity H = 2.669 and average tree
density was 0.057/ m2. Avian diversity in natural forest site was represented by 33 bird species that belong to 8 taxonomic
order. Order Passeriformes was represented by 24 species of birds. Avian diversity in plantation forest site was represented
by one taxonomic order (Passeriformes) and three species of birds in this order only. Drastic loss of avian fauna was evident
due to alteration of habitat. Same could also apply be true for other faunal groups.
Running title: Habitat change and avian diversity
Key words - Tropical forest, Habitat alteration, Avian biodiversity.