Forest and Wood Products

Forest and Wood Products

Quantification of structural diversity of Pistacia atlantica Desf. and Juniperus excelsa M. Bieb. forest stands (Case study: Irano-Turanian region, East Azerbaijan, Iran)

Document Type : Research Paper

Authors
Raheleh Ostadhashemi 1
Khosro Sagheb-Talebi 2
Akbar Abdi Ghazi Jahani 1
Javad Sheikhzadeh 1
1 Forests and Rangelands Research Department, East Azerbaijan Agriculture and Natural Resources Research and Education Center (AREEO), Tabriz, Iran.
2 Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran.
10.22059/jfwp.2024.373745.1286
Abstract
This research aimed to quantify the structure of juniper and pistachio forest stands. To achieve this, two one-hectare sample plots were randomly selected: Pistacia atlantica in the Eslami Island region and Juniperus excelsa M. Bieb. in the Kaghazkonan region. Quantitative measurements included diameter at breast height (DBH), collar diameter, tree height, and crown diameter for all trees. The spatial pattern of the two stands was analyzed using the distance-azimuth method, and structural diversity was assessed in terms of species mingling, tree dimensions, and spatial position based on the four nearest neighbors method. The results showed that the most abundant species were P. atlantica and Ephedra major in plot 1, and J. excelsa and Cotoneaster nummularioides in plot 2. The average DBH and canopy cover were 22 cm and 569.5 m² in plot 1, and 4 cm and 1195 m² in plot 2, respectively. Species mingling was low in plot 1 (0.31), while plot 2 had higher mingling (0.5). Additionally, crown area differentiation was high, while height differentiation was intermediate in both stands. The mean distances between trees, 7.4 m in plot 1 and 2.8 m in plot 2, indicated sparse and dense stands, respectively. The assessment of structural diversity showed high values for both stands, with plot 2 (0.539) having significantly higher diversity than plot 1 (0.459). This highlights the importance of species mixture in the structural diversity of forest stands. This information serves as an important tool for silvicultural interventions, monitoring, and evaluating forest stand management effectiveness.
Keywords
Crown area differentiation
Forest structure
Spatial pattern
Species mingling
Subjects
  • Aguirre, O., Hui, G., Gadow, K.V., & Jimenez, J. (2003). An analysis of forest structure using neighborhood-based variables. Forest Ecology and Management, 183, 137-145.
  • Pommerening, A. (2002). Approaches to quantifying forest structures. Forestry, 75(3), 305-324.
  • Pastorella, F., & Paletto, A. (2013). Stand structure indices as tools to support forest management: an application in Trentino forests (Italy). Journal of Forest Science, 59(4), 159-168.
  • Oliver, C.D., & Larson, B.C. (1996). Forest Stand Dynamics, John Wiley, New York.
  • Chen, L., Comita, L.S., Wright, S.J., Swenson, N.G., Zimmerman, J.K., Mi, X., Hao, Z., Ye, W., Hubbell, S.P., Kress, W.J., Uriarte, M., Thompson, J., Nytch, C.J., Wang, X., Lian, J., & Ma, K. (2018). Forest tree neighborhoods are structured more by negative conspecific density dependence than by interactions among closely related species. Ecography, 41(7), 1114-1123.
  • Churchill, D.J., Larson, A.J., Dahlgreen, M.C., Franklin, J.F., Hessburg, P.F., & Lutz, J.A. (2013). Restoring forest resilience: from reference spatial patterns to silvicultural prescriptions and monitoring. Forest Ecology and Management, 291, 442-457.
  • Pommerening, A., Wang, H., & Zhao, Z. (2020). Global woodland structure from local interactions: new nearest-neighbour functions for understanding the ontogenesis of global forest structure. Forest Ecosystems, 7(22), 1-11.
  • Yue, Q., Geng, Y., Gadow, K., Fan, C., Zhang, C., & Zhao, X. (2022). Effects of neighborhood interaction on tree growth in a temperate forest following selection harvesting. Ecological Indicators, 136, 1-9.
  • Graz, F.P. (2004). The behavior of the species mingling index Msp in relation to species dominance and dispersion. European Journal of Forest Research, 123(1), 87-92.
  • Pommerening, A. (2006). Evaluating structural indices by reversing forest structural analysis. Forest Ecology and Management, 224(3), 266-277.
  • Wang, H., Zhang, G., Hui, G., Li, Y., Hu, Y., & Zhao, Zh. (2016). The influence of sampling unit size and spatial arrangement pattern on neighborhood-based spatial structure analyses of forest stands. Forest Systems, 25(1), 1-9.
  • Dong, L., Bettinger, P., & Liu, Z. (2022). Optimizing neighborhood-based stand spatial structure: Four cases of boreal forests. Forest Ecology and Management, 506 (119965), 1-10.
  • Zohary, M. (1973). Geobotanical foundation of the Middle East. G. Fischer, Stuttgart.
  • Fattahi, M. (1995). Pistacia ecology, Proceedings of the First National Seminar of pistacia, Natural Resources and Animal Science Research Center of Ilam, Ilam, pp. 92-113.
  • Barzegar Ghazi, A., & Abdi Ghazi Jahani, A. (2001).Pistachio as a compatible species in semi-arid region of Tabriz. Second National Seminar of pistacia, Natural Resources and Animal Science Research Center of Fars.
  • Khoshnevis, M., Matinizadeh, M., Shirvany, A., & Teimouri, M. (2017). Iranian long-lived Junipers. Iran Nature, 2(5), 20-35.
  • Rostamikia, Y., & Zobeiri, M. (2013). Study on the structure of Juniperus excelsa Beib Stand in Khakhal protected forests. Journal of Wood & Forest Science and Technology, 19(4), 151- 162. (In Persian)
  • Sadeghi, S.M.M., Alijani, V., Namiranian, M., & Mohamadizadeh, M. (2016). Structural characteristics of Juniperus excelsa in the mountainous forests of Alborz south facing slope (Case study: Atashgah, Karaj). Iranian Journal of Forest, 8(1), 35-49. (In Persian)
  • Garavand, Y., Hoseini, M., Ahmadi, K., Ghomi Avili, A., & Ahadi, A.R. (2016). Investigation on Structure of pistacia trees in protected and grazed areas (Baghe shadi protected area, Yazd). Iranian Natural Ecosystems, 7(2), 89-102. (In Persian)
  • Zare, L., Erfanifard, S.Y., Taghvai, M., & Kariminejad, N. (2016). Efficiency of distance sampling methods in estimation of biometric characteristics of wild pistachio (pistachio atlantica subsp. mutica) open stands in Zagros. Journal of Wood & Forest Science and Technology, 23(3), 144-125. (In Persian)
  • Ghanbari, S., & Sefidi, K. (2018). Structure and spatial distribution pattern of tree communities of Juniper (Juniperus foetidissima Willd) in Arasbaran region. Plant Research, 31(4), 910-921. (In Persian)
  • Sefidi1, K., Firouzi, Y., Sharari, M., Behjou, F.K., & Rostamikia, Y. (2018). Quantification of spatial structure of juniper stands in Kandaragh region. Iranian Journal of Forest, 10(1), 207-220. (In Persian)
  • Zandebasiri, M., Sagheb‑Talebi, Kh., Jahanbazi Goujani, h., Talebi, M., Iranmanesh, Y., Mokhtarpour, T., Pezdevšek Malovrh, Š., & Grošelj, P. (2023). Evaluating structural indices of Pistacia atlantica and Prunus arabica (Olivier) Meikle stands: Iranian forest lands Case Study. Arabian Journal of Geosciences, 16(263), 1-14.
  • Thimonier, A., Kull, P., Keller, W., Moser, B., & Wohlgemuth, T. (2011). Ground vegetation monitoring in Swiss forests: comparison of survey methods and implications for trend assessments. Environmental Monitoring and Assessment, 174(1-4), 47-63.
  • Ali-Ahmad-Korouri, S., & Khoshnevis, M. (2001). Ecological and Environmental Studies of Iranian Juniper Habitats, Research Institute of Forests and Rangelands press, Number 229.
  • Alberdi, I., Condés, S., & Martínez-Millán, J. (2010). Review of monitoring and assessing ground vegetation biodiversity in national forest inventories. Environmental Monitoring and Assessment, 164(1-4), 649-676.
  • Pommerening, A., & Stoyan, D. (2008). Reconstructing spatial tree point patterns from nearest neighbor summary statistics measured in small subwindows. Canadian journal of forest research, 38(5), 1110-1122.
  • Pommerening, A., & Grabarnik, P. (2019). Individual-based Methods in Forest Ecology and Management. Springer Nature, Switzerland.
  • Petritan, AM., Biris, IA., Merce, O., Turcu, D., & Petritan, IC. (2012). Structure and diversity of a natural temperate sessile oak (Quercus petraea)-European Beech (Fagus sylvatica L.). Forest Ecology and Management, 280, 140-149.
  • Dong, L., Liu, Z., Li, F., & Jiang, L. (2014). Quantitative analysis of forest spatial structure and optimal species composition for the main forest types in Daxing’anling, Northeast China. Forest Research, 27(6), 734-740.
  • Askari, Y., Soltani, A., & Sohrabi, H. (2014). Evaluation of Spatial distribution pattern of tree and shrub species in a central Zagros (Case study: Chahartagh forest reserve). Iranian Journal of Forest and Poplar Research, 22(2), 175-187. (In Persian)
  • Habashi, H., Hosseini, S.M., Mohammadi, J., & Rahmani, R. (2007). Stand structure and spatial pattern of trees in mixed Hyrcanian Beech forests of Iran. Iranian Journal of Forest and Poplar Research, 15(1), 55-64. (In Persian)
  • Sefidi, K., Marvie Mohadjer, M.R., Mosandl, R., & Copenheaver, C.A. (2011). Canopy gaps and regeneration in old-growth Oriental beech (Fagus orientalis Lipsky) stands, northern Iran. Forest Ecology and Management, 262(6), 1094-1099.
  • Sefidi, K. (2023). Rare species impacts on structural complexity index (SCI) in the Hyrcanian beech forests. Forest Research and Development, 9(2), 205-219. (In Persian)
  • Babaei, S., Bayat, M., Namiranian, M., & Heidari Masteali, S. (2018). Investigating structure monitoring indicators for wooden species of Northern forests of Iran. Journal of Wood & Forest Science and Technology, 25(2), 65- 79. (In Persian)
  • Akhavan, R., Hassani, M., & Sadeghzadeh Halaj, M.H. (2023). The comparison of pure beech stands using SCI index in the Hyrcanian forests of Iran (Mazandaran province). Iranian Journal of Forest, 14(4), 445-456. (In Persian)
Forest and Wood Products
Volume 77, Issue 2
Summer 2024
Pages 97-110