Tree species diversity and distribution patterns in tropical forests of Garo Hills.

Abstract

We analysed phytosociological characteristics and diversity patterns of tropical forest tree species in Garo Hills, western Meghalaya, Northeast India. The main vegetation of the region included primary forests (PFs), secondary forests (SFs), and sal (Shorea robusta) plantations, with 162, 132, and 87 tree species respectively. The Shannon-Wiener diversity index of trees in PF was 4.27 (n=21 one-ha belt-transects), which is comparable to the world's richest tropical forests. Statistical results revealed that primary forests were more tree-rich and diverse than secondary forests or sal plantations. Results of the study will help forest managers in conservation planning of the tropical forest ecosystem of Northeast India.