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Study of plantation effect on richness of herbaceous in forest area using biodiversity index in north of Iran | ||
| Caspian Journal of Environmental Sciences | ||
| مقاله 4، دوره 2، شماره 1، فروردین 2004، صفحه 17-20 اصل مقاله (1.27 M) | ||
| نویسندگان | ||
| H. Pourbabaie؛ T.R. Shahraji* ؛ L. Baktash | ||
| Dept. of Forestry, Faculty of Natural Resources, Guilan University, P.O.Box 1144, Somehe Sara, | ||
| چکیده | ||
| The depletion of forest in developing countries due to extended pastures, agricultural land, fuel wood and etc. is a serious concern. Therefore planting trees for reforestation and extended forest area is a essential assignment. Forest plantation with a basic criterion affects to understory plant diversity. This effects may make some species absent or appear. The objective of this study is to assess the plant diversity of two different plantation which established by Pinus teada and Acer insign and compare with a natural forest stand which were similar in geographic and climatic conditions. Twenty sample plots with 32 square meters were randomly selected . In each plot all herbaceous species were recorded. Richness and Evenness of plant species calculated using the biodiversity indices (Simpson index and Margalov index). The obtained results showed that the value of plant diversity was higher in natural forest, while Acer plantation had the lowest value. The Richness and Evenness value were higher in natural forest stand, while Richness and Evenness value were lower for Pinus teada and Acer insign plantation respectively. REFERENCES Deal, RL. (1997). Understory plant diversity in riparian Alder Conifer stands after relation to woody substrate and successionnal stage in aspen mixed wood boreal forest. Canadian Journal of Botany, 76: 641-651. DonKoo and Lee (1999). Challenges to forest science in Asia forest science and forestry contributory to Quality of Human life in developing countries proceeding of an IUFRO Seminar in Copenhagen, 3rd September 1999. FAO (1999). State of the word. 1999 united nation food and Agricultural organization, Rome 154 p. cited by Mitschka J. Hartly: 2002 Rationale and Methods for conserving biodiversity in plantation forests. Gilliam F.S. (2002). Effects of harvesting on herbaceous layer diversity of a central. Appalachian hardwood forest in west Virginia, USA forest Ecology and management 155: 33 - 43. Krebs, C.J. (1989). Ecological methodology. University of British Columbia. Harper Collins publishers, 432 p. Rashmi-Rajvan S. et al. (1987). Herbaceeous undergrowth in some forest habitats in Niligiris. Indian forester. 113: 599 - 608. Robert, M.R. and Zue, L. (2002). Early response of the herbaceous layer to harvesting in a mixed conferous— deciduous forest in new Bruns wick. Canada forest Ecology and Management 155: 17-31 Savill, S.P. and Evans J. (1984). Plantation silviculture in temperate Regions, Clarendon press. Oxford, U.K. World Resources Institute (1998). Oxford University press Oxford 369 p. cited by Mitschka J. Hartley 2002 Rationale and Methods for conserving biodiversity in plantation forests. Forest Ecology and Management 155: 81-85. | ||
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