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Plant diversity is essential for human survival and economic well-being and also for the ecosystem function and stability. The total number of accessible seedlings and saplings in a forest community indicates the regeneration status/potential of a species or a forest. In this study, composition, diversity and population structure of three different forests (Banj oak, Chir-pine and Mixed oak-pine) was assessed around Nainital town of Uttarakhand state. Species richness and diversity were maximum in Banj-oak forest (9 species and 1.970, respectively) and minimum in Chir-pine forest (4 species and 0.634, respectively). The total tree density ranged from 1670 (Chir pine forest) to 1830 ind.ha-1 (Mixed oak pine forest) and the total basal area ranged from 87.22 (Mixed oak pine forest) to 208.37 m2ha-1 (Banj oak forest). Population structure revealed dominancy of mature trees and less number of seedlings evidently indicated the poor regeneration across the forests type. Viability of seeds, disturbances brought by frequent fire incidence, erosion of soil and water, uncontrolled grazing by animals, lopping/cuttings of under canopy plant species by villagers for fuel and fodder are the possible causes of the poor regeneration of the forests.

Plant diversity and regeneration potential of three different forests of Central Himalaya