Abstract
The montane closed evergreen forests found at altitudes above 1,800 m in the Western Ghats of India possess a distinct vegetation type and are called shola forests. Despite the fact that these forests are located in relatively inaccessible areas, they are still under anthropogenic pressure leading to continued habitat degradation and loss of biomass and biodiversity. A case study was conducted in Mananvan shola, the largest shola forest in Kerala of Western Ghats, to recognize the impact of disturbance on vegetation structure, composition and regeneration pattern, to identify the socio-economic reasons for disturbance and to evolve strategies for its management. In the disturbed part of the forest, dominance of light demanding species in tree, shrub and herb communities has been recorded. Here even the dominance of exotic species in tree seedling, shrub and herb communities is prominent. Skewed girth class distribution of tree community with poor representation by the individuals of girth class 30.1 to 90.0 cm, is also an indication of the collection of small wood and poles from the forest. The RISQ (Ramakrishnan Index of Stand Quality) in the disturbed area of the forest is above 2.0 as against near to 1.0 in relatively undisturbed forest stands suggesting that the disturbance is intensive and thus natural recovery process would be slow. Socioeconomic analysis in villages located near the shola forest revealed the fact that the people depended heavily on this forest for their livelihood. Thus, the crux and the success of future management and conservation strategy depend on how one can reduce the dependency of people on the shola vegetation. Enrichment planting in disturbed parts of shola, enhancement of firewood by raising energy plantations, as well as development of lemongrass and firewood based agroforestry systems and reduction of grazing pressure by developing silvopastoral systems are the major strategies for the conservation of these shola forests.
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References
Blasco F. 1970. Aspects of the Flora and Ecology of Savannas of the South Indian Hills. Journal of Bombay Natural Historical Society 67:522–534.
BURTT-DAVY J. 1938. The Classification of Tropical Woody Vegetation Types. Imperial Forest Institute Paper No. 13. Manager of Publications, New Delhi.
CHAMPION H.G. 1936. Preliminary Survey of the Forest Types of India and Burma. Indian Forest Record. Vol.1. Manager of Publications, New Delhi.
CHAMPION H. G. and SETH S. K. 1968. A Revised Survey of the Forest Types of India. Manager of Publications, New Delhi.
Chandrasekharan C. 1960. Forest Types of Kerala State. Special paper submitted for Diploma in Forestry. New Forest, Dehra Dun, India.
Chandrashekara U. M. 1998. Ramakrishnan Index of Stand Quality (RISQ): An Indicator for the Level of Forest Disturbance. In: Damodaran, A.D. (ed.), Proceedings of the Tenth Kerala Science Congress. State Committee on Science, Technology and Environment, Thiruvananthapuram, Kerala, India. Pp. 398–400.
Chandrashekara, U.M. 2000. Forest and agricultural ecosystem analysis to assess ecosystem health and to identify rehabilitation strategies. In: Ramakrishnan, P.S. et al. (eds.), Mountain Biodiversity, Land use Dynamics and Traditional Ecological Knowledge. UNESCO. Oxford & IBH Publ. New Delhi. Pp. 177–205.
Chandrashekara U. M. and Ramakrishnan P. S. 1994. Vegetation and Gap Dynamics of a Tropical Wet Evergreen Forest in the Western Ghats of Kerala, India. Journal of Tropical Ecology 10: 337–354.
Chandrashekara U. M. and Sankar S. 1998. Ecology and Management of Sacred Groves in Kerala, India. Forest Ecology and Management 112: 165–177.
CURTIS J. T. 1959. The Vegetation of Wisconsion: an Ordination of Plant Communities. University of Wiscosin Press, Madison, Wisconsin.
Denslow J.S. 1980. Patterns of Plant Species Diversity during Succession under Different Disturbance Regimes. Oecologia 46: 18–21.
Doumenge C., Giolmour, D., Perz, M.R. and Blockhus J. 1995. Tropical Montane Cloud Forests: Conservation Status and Management Issues. In: Hamilotn, L.S. et al. (eds.), Tropical Montane Cloud Forests. Springer-Verlag, New York. Pp. 24–37.
GAMBLE J. S. 1928. Flora of the Presidency of Madras, 3 volumes. Adlered & Son Limited, London.
Gentry A.H. 1992. Tropical forest biodiversity: distributional patterns and their conservational significance. Oikos 63: 19–28.
Jose S., Sreepathy, A., Kumar, B. M. and Venugopal, V. K. 1994. Structural, Floristic and Edaphic Attributes of the Grassland-Shola Forests of Eravikulam in Penisular India. Forest Ecology and Management 65: 279–291.
Knoop W.T. and Walker, B.H. 1985. Interactions of Woody and Herbaceous Vegetation in Southern African Savanna, Journal of Ecology 73:235–253.
Kunhinkrishnan E. 2001. The Sholas and Grasslands in the Western Ghats. Science India 4:29–32.
LAL J.B. 1989. India’s Forests; Myth and Reality. Nataraj Publisher, Dehra Dun, India.
MISHRA K.C. 1989. Manual of Plant Ecology. Oxford and IBH Publishing Company. New Delhi.
NAIR S. C. 1991. The Southern Western Ghats: A Biodiversity Conservation Plan. INTACH, New Delhi.
PASCAL J. P. 1988. Wet Evergreen Forests of the Western Ghats of India: Ecology, Structure, Floristic Composition and Succession. Institut Francais de Pondicherry, Pondicherry, India.
Perrings C. and Walker B.H. 1997. Biodiversity, Resilience and the Control of Ecological Economic System: The Cases of Fire Driven Rangelands. Ecological Economics 22:73–83.
Perrings C. 1989. An Optimal Path to Extinction? Poverty and resource degradation in the Open Agrarian Economy. Journal of Development Economics 30: 1–24.
PHILLIPS E. A. 1959. Methods of Vegetation Study. Henry Hold & Company, New York.
RAI S. N. 1979. Gap Generation in Wet Evergreen Forest of Karnataka. Karnataka Forest Department Research Paper, KFD-2. Karnataka Forest Department, Bangalore.
Ranganathan C. R. 1938. Studies on the Ecology of the Grassland Vegetation of the Nilagiri Plateau. Indian Forester 64: 523–541.
Rangarajan A. 1997. Shredding the Nilgiris. Sanctuary Asia 17: 30–37.
Roba A.W. 2000. Costs and Benefits of Protected Areas: Marsabit Forest Reserve, Northern Kenya. In: Perrings, C. (ed.), The Economics of Biodiversity Conservation in Sub-Shaharan Africa. Edward Elgar, U.K. Pp. 115–154.
SCHIMPER A.F.W. 1903. Plant Geography upon a Physiological Basis. Clarendon Press, Oxford.
THOMAS, A. 2000. Cost of Cultivation of One Hectare of Lemon Grass. Kerala Agricultural University, Aromatic and Medicinal Plants Research Station, Odakkali, Kerala, India.
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Chandrashekara, U.M., Muraleedharan, P.K. & Sibichan, V. Anthropogenic pressure on structure and composition of a shola forest in Kerala, India. J. Mt. Sci. 3, 58–70 (2006). https://doi.org/10.1007/s11629-006-0058-0
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DOI: https://doi.org/10.1007/s11629-006-0058-0