Tree Diversity and Ecosystem Carbon Stock Assessment in Nambor Wildlife Sanctuary, Assam

  • Krishna GiriEmail author
  • Putul Buragohain
  • Surabhi Konwar
  • Bijoy Pradhan
  • Gaurav Mishra
  • Dinesh Kumar Meena
Research Article


A study was carried out to assess tree diversity, forest carbon stock and carbon dioxide (CO2) sequestration in Nambor tropical semi-evergreen forest. A total of 53 tree species from 47 genera and 32 families were recorded in the forest. Vatica lanceifolia was the dominant tree species with maximum 33.78 importance value index (IVI), 0.30 Shannon diversity index (H′) and 0.03 Simpson’s index (D) followed by Lagerstroemia reginae (20.75 IVI, 0.18 H′ and 0.004 D), Dysoxylum excelsum (17.70 IVI, 0.20 H′ and 0.006 D), Sterculia villosa (14.15 IVI, 0.09 H′ and 0.0007 D) and Toona ciliata (11.60 IVI, 0.07 H′ and 0.0004 D) as codominant species. Among the forest carbon pools, maximum 50.32% carbon was stored in soil followed by 39.42% in above ground biomass and 10.21, 0.03 and 0.02% in below ground, leaf litter and dead debris pools, respectively. Total ecosystem carbon stock in Nambor forest was estimated to be 244.78 Mg ha−1. The estimated carbon stock was extrapolated over 3700 hectare area and found to be 905186.50 Mg. The total forest carbon stock was also converted into CO2 equivalents and estimated as 3,322,034.46 Mg. The study observed that forest ecosystem offsets significant amount of atmospheric CO2; therefore, conservation and management of forest resources are imperative to combat global climate change.


Nambor Wildlife Sanctuary Forest carbon pools CO2 offsetting Climate change mitigation 



This study was funded by the Indian Council of Forestry Research and Education, Dehradun, under National Forestry Research Programme, Grant number No. RFRI/2013-14/SCD-08. The authors are thankful to the Department of Environment and Forests, Govt. of Assam, for granting permission to carry out the research work. All the necessary facilities provided by the Director, Rain Forest Research Institute, Jorhat, Assam, are gratefully acknowledged. The authors are also grateful to anonymous reviewer for providing valuable suggestions to improve the overall quality and readability of the manuscript.

Compliance with Ethical Standards

Conflict of interest

The authors declare no conflict of interest to publish this manuscript.


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Copyright information

© The National Academy of Sciences, India 2019

Authors and Affiliations

  1. 1.Rain Forest Research InstituteJorhatIndia

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