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Abstract
The present study was carried out in Sahastradhara, a famous picnic spot of Doon Valley. During the tourist season, more than 5 lakh tourists visit the site for their recreation. The tourist activities has declined the native species diversity and promoted the introduction of 96 exotic species. Tropical America and Tropical South American plants have contributed to 45% and 2% of the total invasive diversity respectively. Asteraceae with 13 species is the most dominant family of the site.
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References
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- Chandra Sekar K., Asheesh Pandey, S.K. Srivasta and Lalit Giri, 2015. Invasive alien plants of Himachal Pradesh, India. Indian Forester, 141(5) : 520-527.
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- Lonsdale, W.M. 1999. Global patterns of plant invasions and the concept of invasibility, Ecology, 80 :1522-1536.
- Pysek P. 1998. Is there a taxonomic pattern to plant invasions?, Oikos, 82, pp. 282-294
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- Raunkiaer, C., 1934. The life-forms of plants and statistical plant geography. The Clarendon Press, Oxford. pp. 632.
- Reddy, C.S. 2008. Catalogue of invasive alien flora of India. Life Science Journal, 5 : 84-89.
- Singh, A.P., Shukla, A.N. and Singh, J.S. 2010. State level inventory of invasive alien plants, their source region and use potential. Current Science, 99(1) : 107-114.
- Timilsina N., M.S. Ross, J.T. Heinen 2007. A community analysis of sal (Shorea robusta) forests in the Western Terai of N epal. Forest Ecology and Management, 241 : 223-234.
References
Babu, C.R. 1977. Herbaceous flora of Dehra Dun, New Delhi.
Chandra Sekar K., Asheesh Pandey, S.K. Srivasta and Lalit Giri, 2015. Invasive alien plants of Himachal Pradesh, India. Indian Forester, 141(5) : 520-527.
Chandra Sekar K., Manikandan R. and Srivastava S.K., 2012. Invasive alien plants of Uttarakhand Himalaya. Proceedings of National Academy of Science, India, Section B : Biological Sciences, 82(3) : 375-383.
Duthie, J. F. 1906. Catalogue of the plants of Kumaon and of the adjacent portions of Garhwal and Tibet based on the collections of Winterbottom during the years 1846-1849. London.
Fridley J.D., J.J. Stachowicz, S. Naeem, D.F. Sax, E.W. Seabloom, M.D. Smith, TJ. Stohlgren, D. Tilman, B. Von Holle, 2007. The invasion paradox: reconciling pattern and process in species invasions. Ecology, 88 :. 3-17.
Gaur, R. D. 1999. Flora of District Garhwal North West Himalaya (with ethnobotanical notes). Transmedia Publisher, Srinagar (Garhwal). India. Pp. 811.
Heywood V.H. 1989. Patterns, extents and models of invasions by terrestrial plants. In : Biological Invasions: A Global Perspective, J.A. Drake, et al., (eds.) SCOPE 37, Willey & Sons., Chichester, pp. 31 - 55.
Jain, S. K. and Rao, R. R. 1977. A Handbook of Field and Herbarium Methods. Today and Tomorrow’s Printers & Publishers, New Delhi.
Lonsdale, W.M. 1999. Global patterns of plant invasions and the concept of invasibility, Ecology, 80 :1522-1536.
Pysek P. 1998. Is there a taxonomic pattern to plant invasions?, Oikos, 82, pp. 282-294
Rao, R.R. and Murugan, R. 2006. Impact of exotic adventies weeds on native biodiversity in India : Implications for Conservation. In : Invasive Alien Species and Biodiversity in India (Rai, L.C., Gaur J.P. etd.) BHU, Varanasi, pp. 93-109.
Raunkiaer, C., 1934. The life-forms of plants and statistical plant geography. The Clarendon Press, Oxford. pp. 632.
Reddy, C.S. 2008. Catalogue of invasive alien flora of India. Life Science Journal, 5 : 84-89.
Singh, A.P., Shukla, A.N. and Singh, J.S. 2010. State level inventory of invasive alien plants, their source region and use potential. Current Science, 99(1) : 107-114.
Timilsina N., M.S. Ross, J.T. Heinen 2007. A community analysis of sal (Shorea robusta) forests in the Western Terai of N epal. Forest Ecology and Management, 241 : 223-234.