Abstract
The present paper deals with the study conducted to know the floristic diversity assessment and vegetation composition analysis in various forest types of Dharmapuri Forest division situated in Eastern Ghats of Southern India in the state of Tamilnadu. A total of 352 species of 233 genera and belonging to 79 families were recorded. The quantitative features such as density and important value index (IVI) varied greatly among forest and different forest types. In the present study the diversity index of shrubs and herbs were found to be higher than the tree species. The presence of high number of higher girth class of tree species and low number of sapling and seedling indicates that the present forest is old and exhibiting the low regeneration.
Highlights
Tropical forest constitutes the most diverse plant communities on earth and it cover’s 7% of the earth’s land surface, but harbor more than half of the world’s species (Wilson, 1988), and are currently vanishing at an overall rate of 0.8-2% per year (May and Stumpf, 2000; Sagar et al.2003; Naidu and Kumar, 2015)
The vanishing of tropical forests comes at a time when our data on their structure and dynamics is sadly not enough (Hubbell and Foster, 1992)
Southern tropical dry mixed deciduous forest. This is the most conspicuous type of deciduous forest in the division spreading over almost all the reserved forests of Palacode and Bevanurmalai of Pennagaram Range
Summary
Tropical forest constitutes the most diverse plant communities on earth and it cover’s 7% of the earth’s land surface, but harbor more than half of the world’s species (Wilson, 1988), and are currently vanishing at an overall rate of 0.8-2% per year (May and Stumpf, 2000; Sagar et al.2003; Naidu and Kumar, 2015). India is one of the 12 mega diversity countries in the world. 25 hot-spots have been identified on the basis of the species endemism and degree of threat through habitat loss (Mayers et al, 2000). Among the rich biodiversity hot spot areas in India are such as the Eastern and Western Ghats, Western and Eastern Himalayas and Andaman islands.
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