Vivek Dhand , A. K. Tripathi , R. K. Manhas , J. D. S. Negi , P. S. Chauhan

Abstract

A study was carried out in the Forest Research Institute Campus, Dehra Dun to estimate the carbon content of some of the important tree species to have an idea about the responses of these species to the changing climate. The conclusive outputs of this paper are, (i) Pinus roxburghii is storing maximum amount of carbon followed by Pterospermum acerifoIium, Syzygium cumini etc.; (ii) the carbon storing efficiency of some species like P. roxburghii, Shorea robusta etc. is decreasing with increasing concentration of CO₂, This may be due to the fact that biota is currently releasing additional carbon to the atmosphere rather than storing carbon. This new hypothesis, against our general hypothesis that with increasing atmospheric carbon the efficiency of storing carbon will also increase, is a preliminary study and needs much more studies and experiments.

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Mukesh Kumar Gautam , A. K. Tripathi , R. K. Manhas

Abstract

Changes in an ecosystem are inevitable. Recording of these changes can prove to be fruitful for the management of forests, particularly the moist Sal forest. Present study was carried out in Sal Forests of Lachchhiwala, a famous pcinic spot, to assess the changes in dominanace and diversity of plant species since 1987. After critically analyzing the results it was found that Sal is still the most dominant tree species. In shrub and herb layers the species richness has increased significantly and so is the species diversity. It was also found that homogeneous Sal forests, managed as monocultures, are slowly but steady becoming heterogeneous.

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