Abstract
Micro-environmental factors viz., soil moisture and light intensity are important factors that affect natural regeneration in forests. These factors vary spatially depending on the overhead canopy density of the forest. The present study focused on studying the effect of variation of soil moisture and light intensity on natural regeneration of sal species (Shorea robusta) under different micro-environments due to overhead canopy of varying forest density. Experimental plots of 40m× 40m size were laid under different overhead canopy densities in a small sal forested watershed in the foot hills of Himalayas in Nainital District of Uttarakhand State, India. The plots were monitored on a long term basis for soil moisture at multi depths, light intensity and natural regeneration of sal. The results of the study revealed that the natural regeneration was highest under C1 (up to-0.30) canopy followed by C2 (0.30–0.50), and C3 (0.50–0.70) canopies. The C3 canopy showed the dying back of sal shoots over 4 years of study. The highest R2 value of linear regression between incremental score of plot regeneration and average soil moisture content was obtained as 0.156 for average soil moisture content during non-monsoon months at 100 cm depth. The R2 value between incremental score of plot regeneration and annual average light intensity was obtained as 0.688 which indicated that the regeneration is largely dependent on the light intensity conditions during the year. The multiple linear regression analysis between the incremental score of regeneration and the average light intensity and average soil moisture content revealed that that about 80% of variation in regeneration is explained by both the factors.
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References
Alam M, Furukawa Y, Sarker SK, Ahmed R. 2008. Sustainability of sal (Shorea robusta) forest in Bangladesh: past, present and future actions. International Forestry Review, 10: 29–37.
Boyce JS, Bakshi BK. 1959. Dying of sal. Indian Forester, 85(10): 585–588.
Bullock JM. 2000. Gaps and seedling colonization. In: M. Fenner (ed.), Seeds: The ecology of regeneration in plant communities. 2nd ed., New York: CABI Publishing, pp.375–395.
Champion HG. 1933. Regeneration and management of sal (shorea robusta). Indian Forest Rec. (Old series), Silviculture, 19 (3). Manager of Publications, Delhi.
Champion HG, Seth SK. 1968. A revised survey of the forest types of India. Delhi: The Manager of Publications.
Chauhan DS, Dhanai CS, Singh B, Chauhan S, Todaria NP, Khalid MA. 2008. Regeneration and tree diversity in natural and planted forests in a Terai — Bhabhar forest in Katarniaghat Wildlife Sanctuary, India. Tropical Ecology, 49(1): 53–67.
Dabral BC, Pant SP, Pharasi SC. 1980. Microclimate of a regenerating sal forest in West Dehradun. 2 nd Forestry Conference, Dehradun.
Dam OV. 2001. Forest filled with gaps — Effects of gap size on water and nutrient cycling in tropical rain forest. Tropenbos-Guyana Series 10, Tropenbos-Guyana Programme, Georgetown, Guyana.
Davis PW. 1948. Sal natural regeneration in United provinces. Indian Forester, 74(2): 540–552..
De Jong SM. 1994. Applications of reflective remote sensing for land degradation studies in a Mediterranean Environment. Ph.D. Thesis, Utrecht University, The Netherlands. p. 237.
Denslow JS, Aaron ME, Sanford RE. 1998. Treefall gap size effects on above and below ground processes in a Tropical wet forest. The J of Ecology, 86: 597–609.
Gautam KH, Devoe NN. 2006. Ecological and anthropogenic niches of sal (Shorea robusta Gaertn. f.) forest and prospects for multiple-product forest management — A review. Forestry, 79: 81–101.
Gautam MK, Tripathi AK, Manhas RK. 2007. Indicator species for the natural regeneration of Shorea robusta Gaertn. f. (sal). Current Science, 93(10): 1359–1361
Hole RS. 1914. Ecology of sal (shorea robusta). Indian For Rec, 5(4): 87–102.
Hole RS. 1921. Regeneration of sal (shorea robusta) forests — A study in economic ecology. Ind. Forest Rec. (Old series), Silviculture, 8(2). Manager of Publications, Delhi.
Hutchinson TF, Sutherland EK, Yaussy DA. 2005. Effects of repeated prescribed fires on the structure, composition, and regeneration of mixed-Oak forests in Ohio. Forest Ecology and Management, 218: 210–228.
Jetten VG. 1994. Modelling the effects of logging on the water balance of a tropical rain forest — A study in Guyana. Ph.D.Thesis. Dept. Of Physical Geography, University of Utrecht. Tropenbos Series 6, The Tropenbos Foundation, Wageningen, the Netherlands.
Pande DC. 1956. Natural regeneration of sal in Uttar Pradesh — some recent experimental evidence. Proc. IX Silvi. Conf., Dehradun.
Pokhriyal P, Uniyal P, Chauhan DS, Todaria NP. 2010. Regeneration status of tree species in forest of Phakot and Pathri Rao watersheds in Garhwal Himalaya. Current Science, 98(2): 171–175
Rao PB, Singh SP. 1984. Population dynamics of a foothill sal (Shorea robusta Gaertn. F.) forests in Kumaon Himalaya. Oecol. Plantarum, 6: 147–152.
Rathore CS. 2000. Sal borer problem in Indian sal forests. http://www.iifm.ac.in/databank/problems/salborer.html Retrieved on 10th August, 2009.
Rautiainen O. 1999. Spatial yield model for Shorea robusta in Nepal. Forest Ecology and Management, 119: 151–162.
Rose SA. 2000. Seeds, seedlings and gaps — size matters. A study in the tropical rain forest of Guyana. PhD thesis, Utrecht University. Tropenbos — Guyana Series 9, Tropenbos-Guyana Programme, Georgetown, Guyana.
Sapkota IP. 2009. Species diversity, regeneration and early growth of sal forests in Nepal: responses to inherent disturbance regimes. Ph.D. Thesis, Swedish University of Agricultural sciences, Alnarp.
Saxena AK, Singh JS. 1984. Tree population structure of certain Himalayan forest — annotation and implications of concerning future composition. Vegetation, 58: 61–69.
Seth SK, Bhatnagar HP. 1960. Inter-relation between mineral constituents of foliage, soil properties, site quality and regeneration status in some Shorea robusta forests. Indian Forester, 86(10): 590–601.
Seth SK. 1961. The problem of sal regeneration in Uttar Pradesh. Proc. VIII Silvi. Conf., Dehradun.
Singh JS, Singh SP. 1984. An integrated ecological studies of eastern Kumaon Himalaya with emphasis on natural resources. Final technical report, DST, Govt. of India, New Delhi.
Singh AK, Kumra VK, Singh J. 1987. Forest Resource, Economy and Environment. New Delhi: Concept Publishing Company.
Soni RC. 1961. Recent trends in sal natural regeneration techniques with particular reference to B3 type sal. Proc. X Silvi. Conf., Dehradun.
Srivastava PBL. 1972. Competitive potential of sal seedlings. Indian Forester, 98(8).
Tewari JC. 1982. Vegetation analysis along altitudinal gradients around Nainital. Ph.D. Thesis, Kumaon University, Nainital.
Upreti N, Tewari JC, Singh SP. 1985. The Oak forests of the Kumaon Himalaya (India): composition, diversity and regeneration. Mountain Res. Development, 5:163–174.
Vandenberghe C, Frelechoux F, Gadallah F, Buttler A. 2006. Competitive effects of herbaceous vegetation on tree seedling emergence, growth and survival: does gap size matter? Journal of Vegetation Science, 17: 481–488.
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Tyagi, J.V., Kumar, R., Srivastava, S.L. et al. Effect of micro-environmental factors on natural regeneration of Sal (Shorea robusta). Journal of Forestry Research 22, 543–550 (2011). https://doi.org/10.1007/s11676-011-0197-1
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DOI: https://doi.org/10.1007/s11676-011-0197-1