Natural Vegetation: Forests and Grasslands of North-East India

  • K. R. Dikshit
  • Jutta K. Dikshit
Chapter
Part of the Advances in Asian Human-Environmental Research book series (AAHER)

Abstract

Of the total forest area of around 68 million hectares in India, the North-Eastern states account for over 17 million hectares, roughly one-fourth of the forest area of the country. All the states of North-East India, with the exception of Assam, have 50–80 % of their area under forests. High temperatures, combined with heavy to very heavy rains, have stimulated the growth of forests at lower levels. Even in the mountainous regions, there are heavy rains in summer, and lower temperatures during winter don’t cause excessive evapotranspiration and thus limit the possibility of any moisture stress in the soil. The forests in the hilly regions, despite the destruction of forests by slash and burn cultivation, have survived and are regenerated. These forests have enormous variation in their typology and floral characteristics, ranging from tropical evergreen at lower altitude in upper Brahmaputra valley to pine forests in the Himalayas and birch–rhododendron scrub at still higher levels. Dipterocarpus macrocarpus (Hollong in Assamese) and Mesua ferrea (Nahar in Assamese) are the principal type trees of Assam valley tropical evergreen forests. In the tropical moist deciduous forests, Shorea robusta is the principal species with several associates like Schima wallichii (Makna Sal). The subtropical wet hill forests, as in Meghalaya, have several varieties of oak (Quercus spp.). Richness of flora because of the wet hills presents a climate condition, which combines the characteristics of tropical as well as temperate climate. At higher altitudes, mixed coniferous and coniferous forests occur followed by sub-alpine pastures, rhododendrons and scrubs at still higher altitudes.

North-East India is known for its biodiversity. It is one of the two biodiversity hotspots of India. Half the total number of floral species, known in India, occurs here, and the region forms the richest reservoir of genetic variability. An important aspect of the forests of the region is the profusion of orchids. The North-East region has 876 orchid species, which constitute 70 % of the total orchid flora of India. To preserve the biodiversity of the region, a number of biospheres, national parks and wildlife sanctuaries (2004) are established in the region.

Keywords

Evergreen Forest Dense Forest Forest Department Sacred Grove Clouded Leopard 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. Bhagabati AK, Bhattacharya P (2009) Deforestation and human animal conflict in north bank landscape (Bhalukpong area of the Brahmaputra valley). In: Bhagabati AK (ed) Areas of concern: geographical status of selected problem areas of Assam. Geography Department, Gauhati University, Guwahati, pp 50–66Google Scholar
  2. Bor NL (1935) Conifers of Balipara Frontier Tract. Indian For 61(5):313–319Google Scholar
  3. Bor NL (1938) A sketch of the vegetation of Aka Hills, Assam: a syn-ecological study. Indian For Rec 1:103–107Google Scholar
  4. Bor NL (1942) Relict vegetation of Shillong Plateau, Assam. Indian For Rec, Botany 3:153–195Google Scholar
  5. Bora AK (2009) Forests of Barak valley: the case of Upper Jiri reserved forests. In: Bhagabati AK (ed) Areas of concern: geographical status of selected problem areas of Assam. Geography Department, Gauhati University, Guwahati, pp 23–35Google Scholar
  6. Brandis D (1906) (1990, reprint) Indian trees: an account of trees, shrubs, woody climbers, bamboos and palms in British Empire. Constable and Co, LondonGoogle Scholar
  7. Chakrabarti S (2009) Conservation of orchids by the people of North Eastern India. NeBIO, NECEER, Imphal, pp 48–52Google Scholar
  8. Champion HG (1936) A preliminary survey of the forest types of India and Burma. Indian Forest Records (New series), vol I:1–179. Manager of Publications, Delhi, p 173Google Scholar
  9. Champion HG, Seth SK (1968) A revised survey of forest types of India. Natraj Publishers, Dehra Dun, 404 p.Google Scholar
  10. Davy BJ (1939) Review on the classification of tropical woody vegetation types. Indian For Rec 13:81–83Google Scholar
  11. Deb DB (1960) Forest types studies in Manipur. Indian For 86(29):94–111Google Scholar
  12. Forest Survey of India, Government of India (2005) State of the Forest Report. Forest Survey of India, Ministry of Environment and Forest, DehradunGoogle Scholar
  13. Gamble JS (1881) Manuel of Indian timber: a summary of 906 species of timber, their rate of growth and other matters, 2nd edn. Flora of British India, Dehradun (reprint 2002)Google Scholar
  14. Gazetteer of India (1999) Assam state, vol I. Government of Assam, GuwahatiGoogle Scholar
  15. Ghosh AK, Tiwari KK (1984) Faunal resources of North-East India. In: Tripathi RS (ed) Resource potential of North-East India, vol II, Living resources. Meghalaya Science Society, ShillongGoogle Scholar
  16. Gupta AK (2008) Biodiversity and wildlife research in Northeast India. New Initiatives by the Wildlife Institute of India, Dehradun, Chap. 18.2Google Scholar
  17. Hazarika R, Saikia A (2009) Land use and fragmentation in Karbi–Anglong, Assam. In: Bhagabati AK (ed) Areas of concern: geographical status of selected problem areas of Assam. Geography Department, Gauhati University, Guwahati, pp 73–79Google Scholar
  18. Hegde SN (1984) Orchids of Arunachal Pradesh. Arunachal Pradesh Forest Department, Itanagar, quoted from Chakrabarti, Syamali op.citGoogle Scholar
  19. Jain SK (1985) Conservation of orchids in India. In: Chadha KL, Singh H (eds) Progress in orchid research. IIHR/UNDP, BangaloreGoogle Scholar
  20. Kingdon Ward F (1940) Botanical and geographical exploration in the Assam Himalayas. Geogr J 96(1):1–13CrossRefGoogle Scholar
  21. Kingdon Ward F (1941) Assam adventure. Jonathan Cape, LondonGoogle Scholar
  22. Kumar Y, Syiemlieh HJ, Singh S (2008) Vegetation cover and plant species of degraded landscape in the extremely wet Cherrapunji area. Trans Inst Indian Geogr 30(2):111–124Google Scholar
  23. Lalmunmawia F, Khawlhring N (2011) Cultivation of anthurium in Mizoram, India, present scenario and future prospect. Sci Vis 11(4):203–207Google Scholar
  24. Luna RK (2005) Plantation trees. International Book Publishers, DehradunGoogle Scholar
  25. Medhi RP, Chakrabarti S (2009) Traditional knowledge of NE people on conservation of wild orchids. Indian J Tradit Knowl 8(1):11–16Google Scholar
  26. Murti SK, Joseph J (1984) Plant resources in Northeast India, vol II. Meghalaya Science Society, Shillong, pp 28–39Google Scholar
  27. National Parks and Wildlife Sanctuaries (2004) http://www.wii.gov.in/envis/envis_pa_network/page_states_ut_htm
  28. Puri GS (1960) Indian forest ecology. Oxford Book & Stationary Co., New DelhiGoogle Scholar
  29. Rajkhowa S (1961a) Regeneration of Upper Assam Dipterocarpus-Mesua Forests. Indian For 87(1):406–425Google Scholar
  30. Rajkhowa S (1961b) Forest types of Assam with special reference to the evergreen and semi-evergreen forests. Indian For 87(9):520–541Google Scholar
  31. Rowntree JB (1954) An introduction to the vegetation of Assam valley. Indian For Rec NS 9(1):1–87Google Scholar
  32. Seth SK, Yadav JSP (1960) Soils of the tropical moist evergreen forests of India. Indian For 86(7):401–413Google Scholar
  33. Singh B (1984) Conservation of genetic resources of eastern Himalayan region with special reference to citrus. In: Tripathi RS (ed) Resource potential of North-East India, vol II, Living resources. Meghalaya Science Soc, Shillong, pp 17–21Google Scholar
  34. Directorate of Economics & Statistics (2006) Statistical handbook of Assam. Government of Assam, GuwahatiGoogle Scholar
  35. Stebbing EP (1962) In: Champion SH, Osmaton FC (eds) Forests of India, vol IV, Being the history from 1925 to 1947 of the forests now in Burma, India & Pakistan. OUP, LondonGoogle Scholar
  36. Strachey PD (1956) Development of forestry in Assam in the last fifty years. Indian For 82(2):619–623Google Scholar
  37. Tandon P, Kumaria S (2010) Forest resources of North East India and their sustainable utilization. In: Hasnain SE et al (eds) Biotechnology for sustainable development: achievements and challenges. McGraw Hill Education, New Delhi, pp 183–191Google Scholar
  38. Tripathi RS (2005) Sacred groves of Northeast India and their floristic richness and significance in biodiversity conservation. EnviroNews-Newslett ISEB India 11(3):1–2Google Scholar
  39. Troupe RS (1986, reprint) The silviculture of Indian trees, 3 vols. Originally published by International Book Publishers, DehradunGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • K. R. Dikshit
    • 1
  • Jutta K. Dikshit
    • 1
  1. 1.University of PunePuneIndia

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