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Sreejith, K. A.
- Possible Impact of Climate Change on Tree Species Composition and Diversity in Lowland Evergreen Forests of Kerala , Western Ghats
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Indian Forester, Vol 129, No 6 (2003), Pagination: 770-775Abstract
The major climatic change predicted in the lowland areas in India is the rise in the water table. Thus a comparative study for the phytosociological features was carried out to predict the possible impact of climate change by selecting a swamp forest (altitude 76m above msl) and a forest patch located at an altitude 372m above msl. In both the plots , species of Myristicaceae are dominant. However , the contribution by these species to the total Importance Value Index (lVI) is relatively less in the higher altitude forest plot. In addition , these species show certain morphological features such as stilt ischolar_mains only when they are growing in the swampy area. Thus it is predicted that due to increase in water table , a consequence of climate change , the vegetation structure and composition in relatively higher altitude plots oflowland forests may simulate those of Myristica swamp forest. The study also indicated that the human disturbance alters the vegetation structure and composition , which is different from that by climate change. Thus it is suggested that monitoring and detection of vegetation responses to climate changes should be done by carefully selecting the plots which do not show any sign of other kinds of disturbance.
- A New Population of Santalum album L. (Sandalwood) from Agali Forest Range, Kerala, India
Abstract Views :280 |
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Affiliations
1 Forest Ecology and Biodiversity Conservation Division, Kerala Forest Research Institute, Peechi 680 653, IN
1 Forest Ecology and Biodiversity Conservation Division, Kerala Forest Research Institute, Peechi 680 653, IN
Source
Current Science, Vol 110, No 2 (2016), Pagination: 148-150Abstract
No Abstract.Full Text
- Mineralogical Transformations under Fire in the Montane Grassland Systems of the Southern Western Ghats, India
Abstract Views :219 |
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Authors
Affiliations
1 Department of Soil Science, KSCSTE – Kerala Forest Research Institute, Peechi 680 653, IN
1 Department of Soil Science, KSCSTE – Kerala Forest Research Institute, Peechi 680 653, IN
Source
Current Science, Vol 116, No 6 (2019), Pagination: 966-971Abstract
Forest systems in the Western Ghats region have undergone significant transformations over the past century and wild fires are considered as a major factor for such modifications. Apart from natural fires, prescribed fire is also adopted as a management strategy in some of the forest types in the region. The present study evaluated the impact of prescribed fires on soil components in the high-altitude montane grassland systems of the southern Western Ghats. Fireinduced mineral transformations were assessed using X-ray diffraction (XRD), thermogravimetry (TGA), differential thermogravimetry (DTA), differential scanning calorimetry (DSC) and thermodynamic parameters. Organic carbon content which determines key soil functions was found to reduce from 1.96% before fire and stabilize at 1.48% in soils following fire. XRD and TGA–DTA analyses indicated that major changes in soil during fire occurred between 70°C and 110°C, 250°C and 320°C as well as 430°C and 500°C, corresponding to loss of interlayer water from phyllosilicate minerals, modification of gibbsite to amorphous minerals and goethite to hematite, and transformation of kaolinite to metakaolinite respectively. Thermodynamic parameters (ΔH, ΔS and ΔG) estimated from the DSC curves showed that such transformation had positive enthalpy (ΔH) and Gibbs free energy change (ΔG) values; hence they are not spontaneous or reversible by themselves.Keywords
Clay Minerals, Forest Fire, Montane Grassland Systems, Thermodynamics.Full Text
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