LAND USE, VEGETATION AND CARBON STOCKING ANALYSIS OF DRY TROPICAL FOREST ECOSYSTEM IN PART OF AMARKANTAK BIOSPHERE RESERVE USING GEOSPATIAL TECHNOLOGIES
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Date
2020
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Indira Gandhi Krishi Vishwavidyalaya, Raipur
Abstract
The presentinvestigation on “Land use, Vegetation and Carbon Stocking Analysis 0f Dry Tropical Forest Ecosystem in part of Amarkantak Biosphere Reserve using Geospatial Technologies” was conducted during 2017-2019. Landsat 8 OLI satellite data of study area was used for characterization of Land use/land cover and vegetation types. The ten quadrates of 20 m × 20 m, 2m×2m and 0.5m×0.5m were randomly laid for characterization of floristics, structure and diversity of tree, shrub and herbaceous layers, respectively. Allometric regression methods for trees and shrubs, harvesting method for herbswere employed for biomass estimation and C storage. Standing litter crop and the litter fall on the forest floor were measured in randomly laid sample plots in vegetation type. NPP and C sequestration were finally calculated summing the biomass increment and litter fall of respective vegetation types. Physico-chemical properties of soils are also studied under different vegetation types. Results revealed that area was predominantly by forest vegetationand scrubland, which shared 55.5% of the total study area. The floristic composition shows that forty four (44) species represented by 24 families, 13 species by 9 families and 16 species by 11 families were recorded in tree, shrub and herbaceous layers, respectively. The most abundant family was fabaceae, which recorded highest number (7 and 4) of individuals in both tree and shrub layers, respectively.Basal area of tree layer in the present study ranged from 9.36 to 29.92 m2 ha-1 and shrubs from 2.2 to 6.48 m2 ha-1. Shannon index values in tree layer ranged from 0.61 to 3.07, Simpson index values ranged for 0.064 to 0.74 and Beta Diversity across vegetation types ranged from 2.96 to 3.60 and maximum diversity was found in Mixed Sal and Mixed Forests. The total standing biomass ranged from 63.53 to 600.89 Mg ha-1, standing C from 26.41 to 246 Mg ha-1, of which trees contributed over 90% biomass.The total annual litter fall in different vegetation types ranged from 0.78 to 3.66 Mg ha¬–1 yr-1. NPP and C sequestration ranged from 6.86 to 20.91 Mg ha¬–1 yr-1 and 2.89 to 8.89 Mg ha¬–1 yr-1. It was highest in Mixed Sal Forest followed Mixed Forest, while it was lowest in Bamboo Brake. For total NPP, tree layer contributed from 46.30% to 75.99%, shrubs from 2.91% to 24.78 %, herbs from 3.58% to 12.39%, and litter fall from 6.86% to 20.91%. Total carbon sequestration in vegetationtypes ranged from 2.89 to 8.85 Mg ha¬-1 yr-1. Biomass, C storage, NPP and C sequestration was highest under Mixed Sal Forest and lowest in Bamboo Brake. Organic C in soil, available N, P and K ranged from 7.5 to 17.3 Mg ha-1, 160.7 to 196.9 kg ha-112.1 to 17.7 kg ha-1, 266.4 to 439.1 kg ha-1 and decreased with soil depth. Nutrients were higher in Mixed Sal Forests and lower in Teak forest. The C sequestration levels could be further enhanced through improving stocking density through gap planting and selective thinning practices. The study explores the managerial interventions and opportunities of C benefits to the forest inhabitants under REDD and REDD+ mechanism. The study furtherdiscusses the potentials of C sequestration in dry tropical forests of Achanakmar-Amarkantak Biosphere reserve for mitigating the global warming and climate change.
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LAND USE, VEGETATION AND CARBON STOCKING ANALYSIS OF DRY TROPICAL FOREST ECOSYSTEM IN PART OF AMARKANTAK BIOSPHERE RESERVE USING GEOSPATIAL TECHNOLOGIES
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