“REGENERATION STATUS, SPECIES DIVERSITY, BIOMASS AND CARBON STORAGE PATTERN IN NATURAL AND PLANTATION FORESTS OF SUBHUMID TROPICS IN BARNAWAPARA WILDLIFE SANCTUARY”
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Date
2010
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Indira Gandhi Krishi Vishwavidyalaya, Raipur
Abstract
The present work aimed to study the regeneration status, species diversity, biomass and carbon storage pattern in natural and plantation forests of sub-humid tropics in Barnawapara Wildlife Sanctuary during 2009-2010. Biomass for each site was estimated using allometric equations based on the relationship between girth of tree and dry weight of the component (bole, branch, leaf, root). Trees in the sampling quadrats in each forest were enumerated for their GBH. A total of 33 species of 17 families were encountered. Regeneration status in all the study sites are dissimilar. Although closed natural forest was regenerating well with Diospyros melanoxylon and Cleistanthus collinus. Tree stand density varied from 520-990 stems ha-1 with average basal area ranging from 21.50 to 47.30 m2 ha-1. Species diversity index varied between 0.19 for plantation forest to 3.35 for closed natural forest, Simpson index of dominance ranged between 0.12- 0.95. The Margalef ´s Species Richness Index varied from 0.90-4.93, equatibility index varied from 1.12-2.39 and β diversity varied from 3.03-5.77. Total biomass (t ha-1) recorded was maximum in closed natural forest (473.60) followed by open natural forest (217.59) and teak plantation (134.99). In natural forest maximum biomass was accumulated in higher girth classes while in plantation forest biomass accumulation was higher in middle girth classes. Carbon storage has same pattern as that biomass accumulation at all sites. From these studies it is evident that natural forest has an edge over plantation forest in terms of regeneration , species diversity, dominance, richness, biomass accumulation and carbon storage. Efforts are needed to conserve the natural forest for their diversity and existence. They are supplemented with plantation forests to lower the biotic pressure.
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