J. Bio. Env. Sci.5(2), 201-207, August 2014
The forest trees decline is important phenomenon that usually it emerges or increases due to climate change. Recently this phenomenon has occurred with extensive trees decline in the Zagros oak forest. The purpose of this study is identifying centers of decline associated with topographic factors, investigating the correlation tree diameter with tree decline and comparing the decline between seed tree and coppice tree in Ilam province. With this purpose was investigated the 1700 hectares area in forests of Ilam Province. We used one hundred percent inventory method and it was measured and recorded the qualitative and quantitative characteristics of all declined trees. Variance analysis results obtained from comparing the effect of elevation and aspect on oak decline indicated that elevation hadn’t significant effect on the extent of oak forest decline. Also results showed that slope had a significant effect on the extent of oak decline. This meaningfulness is positive, as increased by increasing slope percentage on oak decline. Pearson’s correlation results about topographical factors and oak decline showed that slope has a positive signification correlation with the extent and percentage of oak decline. Correlation results in regard to decline relationship with elevation and aspect variables suggested lack of meaningful correlation between these factors.
Ahmadi R, Kiadaliri H, Mataji A, Babaei-Kafaki S. 2014. Oak forest decline zonation using AHP model and GIS technique in Zagros Forests of Ilam Province. Journal of Biodiversity and Environmental Sciences 4, 141-150.
Clatterbuck WK, Kauffman BW. 2006. Managing Oak Decline. University of Tennessee Extension 675 p.
Hamzehpour M, Kiadaliri H, Bordbar SK. 2011. Preliminary study of manna oak (Quercus brantii Lindl.) tree decline in Dashte-barm of Kazeroon, Fars province. Iranian Journal of Forest and Poplar Research 19, 352-363.
Hosseini A, Hossein SM, Rahmani A, Azadfar D. 2013. The role of competition in drought related tree dieback in Persian oak (Quercus brantii) forests, central Zagros, Iran. International Journal of Environmental Sciences 3, 2208- 2216.
Jones MI, Coleman TW, Graves AD, Flint ML, Seybold SJ. 2013. Sanitation options for managing oak wood infested with the invasive goldspotted oak borer (Coleoptera: Buprestidae) in Southern California. Journal of Economic Entomology 106, 235-246. doi/full/10.1603/EC12177
Kabrick MJ, Dey C, Daniel R, Randy GJ, Wallendrof M. 2008. The role of environmental factors in Oak decline and mortality in the ozark Highlands. forest Ecology and management 255, 1409-1417. doi:10.1016/j.foreco.2007.10.054
Kane JM, Kolb TE. 2007. Recent tree mortality in mixed-conifer forests of northern Arizona, School of Forestry, Northern Arizona University.
Kessler KJ. 1989. Some perspectives on oak decline in the ‘80s. U.S. Department of Agriculture, Forest Service, North Central Res. St. NC-GTR 132, 25–29.
Lawrence R, Moltzan B, Moser K. 2002. Oak decline and the future of Missouri s Forests. Missori Conservationst 63, 11-18.
Manion PD. 1991. Tree Disease Concepts, second ed. Prentice-Hall, Englewood Cliffs, New Jersey 402p. doi:10.1007/BF02858769
Mirabolfathy M. 2013. Outbreak of charcoal disease on Quercus spp and Zelkova carpinifolia trees in forests of Zagros and Alborz mountains in IRAN. Journal of Plant Pathology 2, 77-79.
Momeni T, Sagheb-Talebi K, Akbarinia M, Akhavan R, Hosseini SM. 2012. Impact of some physiographic and edaphic factors on quantitative and qualitative characteristics of Juniper forest (Case study: Layen region –Khorasan). Iranian Journal of Forest 4, 143-156.
Nebeker TE, Ammon VD, Boyle CR, McCracken FI, Solomon JD. 1992. Oak Decline: A Comparison of Study Results from Different Areas of the South. Mississippi Agricultural Experiment Station, 19p.
Nelson WA, Potapov A, Lewis MA, Hundsdorfer AE, He F. 2007. Balancing ecological complexity in predictive models: A reassessment of risk models in the mountain pine beetle system. Journal of Applied Ecology 45, 248-257. doi: 10.1111/j.1365-2664.2007.01374.x
Oak S, Tainter F, Williams J, Starkey D. 1996. Oak decline risk rating for the southeastern United States. Annals of Forest Science 53, 721–730. doi.org/10.1051/forest:19960248
Starkey DA, Oak SW. 1989. Site Factors and Stand Conditions Associated with Oak Decline in Southern Upland Hardwood Forests, vol. 132. U.S. Department of Agriculture, Forest Service, North Central Res. St., St. Paul, NC-GTR, 95–102.
Suarez ML, Ghermandi L, Kitzberger T. 2004. Factors predisposing episodic drought-induced tree mortality in Nothofagus_site, climatic sensitivity and growth trends. Journal of Ecology. 92, 954-966. doi: 10.1111/j.13652745.2004.00941.x
Thomas WD. Boza CA. 1984. The oak decline complex. Journal of Arboriculture 10, 170–177.