Dynamic assessment of changes in the statistical distribution of the canopy in the central Zagros forests with impact of the decline (Case study: Dadabad- Lorestan)

Document Type : Scientific article

Authors

1 Ph.D. student of Forestry, Faculty of Agriculture, Ilam University, Ilam, I.R. Iran

2 Assistant Professor, Department of Forestry, Faculty of Agriculture, University of Lorestan, Khorramabad, I.R. Iran

Abstract

The main objective of this study was to estimate the effect of decline disturbance on canopy distribution of coppice oak trees in central Zagros region. For this purpose one similar stand with (32ha) in central Zagros (Dadabad in Lorestan province) was selected. Canopy of declined trees was recorded before and after cutting using 100% inventory method. Then Beta, Jonson, Weibull, Gamma, Normal and Log-normal distribution functions were applied. The results of goodness of fit tests suggested that Gama, Jonson and Weibull functions are fitted for introducing Canopy of woody stems in field, respectively, are suitable for Dadabad region. There was difference between before and after decline disturbance based on using statistical distribution. The results of goodness of fit tests for after decline suggested that Weibull, Jonson and Gama functions are fitted for introducing Canopy of woody stems is suitable for Dadabad region. Other distributions had not ability to evaluate this characteristic. Influence of decline in this region was in a way that does not impact on some categories of cover in the same way, so the canopy fitting pattern region has a significant impact. Scanning fitting canopy Zagros forests in different classes and in different time steps, the status of these forests in terms of ecosystem degradation and the process sequence, which in educational management problems and has many applications.

Keywords

References

- Amanzadeh, B., Kh. Sagheb-Talebi, F. Fadaei Khoshkebijari, B. Khanjani Shiraz & A. Hemmati, 2011. Evaluation of different statistical distributions for estimation of diameter distribution within forest development stages in Shafaroud beech stands, Forest and Poplar Research, 19(2): 254-267. (In Persian)
- Attarod, P., S.M.M. Sadeghi, F.T. Sarteshnizi, S. Saroyi, P. Abbasian, M. Masihpoor, F. Kordrostami & A. Dirikvandi, 2014. Effects of meteorological parameters and evapotranspiration on Zagros forests decline in Lorestan province, Iranian Journal of Forest and Range Protection Research, 13(2): 98-114. (In Persian)
- Bozorgi, A., J. Soosani, H. Akbari & H. Jafari, 2011. The pattern of distribution classes stored in the dungeons forest canopy central Zagros region (case study: Cham hesar Delfan-Lorestan province). In: National Conference on Central Zagros forests, capabilities and limitations, Lorestan, Iran. (In Persian)
- Cao, Q., 2004. Predicting parameters of a Weibull function for modeling diameter distribution, Forest Science, 50(5): 682-685.
- Erfani Fard, Y., M. Zobeiri, J. Feghhi & M. Namiranian, 2007. Estimation of crown cover on aerial photographs using shadow index (case study: Zagros Forests, Iran), Iranian Journal of Forest and Poplar Research, 15(3): 278-288. (In Persian)
- Fallahchai, M.M. & S.A. Hashemi, 2011. The application of some probability distributions in order to fit the trees diameter in north of Iran, Journal of Applied Environmental and Biological Sciences, 1(10): 397-400. (In Persian)
- Fallah, A., M. Zobeiri & R. Marvie Mohajer, 2006. An appropriate model for distribution of diameter classes of natural beech stand in the Sangdeh & Shastkolateh Forest, Natural Research, 58(4): 813-821.
- Farhadi, P., J. Soosani, A. Kamran & V. Alijani, 2014. Investigation of positioning and species diversity changes caused by local communities in Zagros forests (Case Study: Ghalehgol forest, Zagros, IRAN), Journal of Wood and Forest Science and Technology, 20(4): 61-80. (In Persian)
- Fattahi, M., 1994. Check Zagros oak forests and the destruction it causes, Research Institute of Forests and Rangelands, Tehran, 63 p. (In Persian)
- Jafari, A., 2012. Comprehensive plan for the management and productivity of forest parks. Natural resources ministration of Lorestan province, Koramabad, 124 p. (In Persian)
- Johnson, E., 2000. Forest Sampling Desk Reference, CRC Press, Washington, D.C., 985 p.
- Hosinzadeh, J., M. Namiramiranian, M. Marvi-Mohadjer & H. Zahedi, 2004. Less degraded forests of oak structure in Ilam, Natural Resources Iran, 57(1):75-90. (In Persian)
- Mattaji, A., S.M. Hojjati & M. Namiranian, 2000. A study of tree distribution in diameter classes in natural forests using probability distribution, Iranian Journal of Natural Resources, 53(2): 165-172. (In Persian)
- Mirzaei, M., A.E. Bonyad & M. Mohebi Bijarpas, 2014. Application of probability distributions in order to fit canopy classes of Quercus brantii trees, Case Study: Dalab forests of Ilam, Forest Sustainable Development, 1(2):195-203. (In Persian)
- Mohammadalizadeh, Kh., M. Namiranian, M. Zobeiri, A. Hoorfar & M. Marvie-Mohadjer, 2013. Modeling of frequency distribution of tree's height in uneven- aged stands (Case study: Khyroud forest), Forest and Poplar research, 66(2): 155-165. (In Persian)
- Namiranian, M., 1990. Application of probability models in description of distribution of trees in diameter classes, Iranian Journal of Natural Resources, 1(1): 93-108. (In Persian)
- Namiranian, M., 2007. Measurement of tree and forest biometry, University of Tehran Press, Tehran, 574 p. (In Persian)
- Nanang, D.M., 1998. Suitability of the Normal, Log-normal and Weibull distributions for fitting diameter distributions of neem plantations in Northern Ghana, Forest Ecology and Management, 103(1): 1-7.
- Nord-Larsen, T. & Q.V. Cao, 2006. A diameter distribution model for even-aged beech in Denmark, Forest Ecology and Management, 231(1): 218–225.
- Palik, B.J. & N. Pederson, 1996. Overstory mortality and canopy disturbances in longleaf pine ecosystems, Canadian Journal of Forest Research, 26(11): 2035-2047.
- Rezaie, E., R. Akhavan, J. Soosani & M. Porhashemi, 2014. Efficiency of kriging for estimation and mapping of crown cover and density of Zagros Oak forests (Case study: Dadabad Region, Khorramabad) Forestry and wood products, 67(3): 359-370. (In Persian)
- Rostamian, M., 2012. Trees canopy distribution in foothill forests of Zagros (case study: Shahanshah forests of Lorestan Province). In: The 3th international conference on environmental challenges and dendrochronology, Sari, Iran. 8 p. (In Persian)
- Rubin, B.D., P.D. Manion & D. Faber-Langendoen, 2006. Diameter distributions and structural sustainability in forests, Forest Ecology and Management, 222(1): 427–438.
- Saghb Tatalebi, Kh., T. Sajedi & F. Yazdanian, 2004. A look at the forests of Iran, Research Institute of Forests and Rangelands, Tehran, 28 p. (In Persian)
- Sohrabi, H. & M.J. Taheri Sarteshnizi, 2012. Fitting probability distribution functions for modeling diameter distribution of oak species in pollarded northern Zagros forests (Case study: Armardeh-Baneh), Forest Research, 4(4): 333-343. (In Persian)
- Wang, J., B.D. Sharma, Y. Li & G.W. Miller, 2009. Modeling and validating spatial patterns of a 3D stand generator for central Appalachian hardwood forests, Journal of Computers and Electronics in Agriculture, 68(2): 141-149.
- Zobeiri, M., 2007. Forest Biometry, TehranUniversity Publications, Tehran, 402 p. (In Persian)

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