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Journal of Arid Land  2017, Vol. 9 Issue (3): 368-378    DOI: 10.1007/s40333-017-0013-7
Orginal Article     
Effects of vegetation patterns and environmental factors on woody regeneration in semi-arid oak-dominated forests of western Iran
JAVAD Mirzaei1, MEHDI Heydari1,*(), PREVOSTO Bernard2
1 Department of Forest Science, Faculty of Agriculture, University of Ilam, Ilam 69315-516, Iran
2 Irstea, UR Ecosystèmes Méditerranéens et Risques, 3275 route de Cézanne, CS 40061, F-13612 Aix-en Provence Cedex 5,France
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This study assesses the effects of vegetation patterns and environmental factors on the abundance of natural tree and shrub regeneration in semi-arid forests of the Zagros Mountains, western Iran. We sampled 120 releves at different topographic positions in a protected area of the studied region. Floristic composition, slope, elevation and soil properties were recorded at each releve, and woody seedling density was measured. We have first discerned five floristic groups using two-way indicator species analysis (TWINSPAN), detrended correspondence analysis (DCA), and canonical correspondence analysis (CCA) and then explored the relationships among the floristic group compositions, environmental factors and seedling densities. The indicator species of the five groups were Quercus brantii, Acer monspessulanum, Cerasus microcarpa, Rhamnus arvensis and Astragalus licyoides. Our results indicated that these groups were significantly affected by elevation and soil properties and the soil properties refer to: EC (electrical conductivity), N (nitrogen), K (potassium), OM (organic matter), and bulk density. Woody regeneration was composed of Q. brantii, A. monspessulanum, C. microcarpa, Amygdalus scoparia and Crataegus pontica seedlings. The highest density of seedlings was found for Q. brantii (97.14 (±48.00) plants/hm2) and the lowest for A. scoparia (2.28 (±1.50) plants/hm2). Quercus brantii was the dominant species and the seedling density was positively correlated with soil pH and P (phosphorus) values. Amygdalus scoparia regeneration was negatively correlated with elevation, and the seedling density peaked in C. microcarpa group. There was no significant variation in distribution of C. pontica seedlings among the groups, but the seedling density of this species was positively correlated with slope and K. Cerasus microcarpa seedlings were more abundant in the Q. brantii group than in other groups. This study showed that the regeneration of tree and shrub species was unequally distributed in different floristic groups for some species (A. scoparia and C. microcarpa) but not for other (Q. brantii and C. pontica) and was generally correlated with some environmental factors, particularly elevation, slope and soil nutrients (P and K). These results are a first step to implement future management and restoration strategies for promoting forest regeneration.

Key wordsabiotic factors      community classification      Zagros Mountains      natural regeneration     
Received: 04 June 2016      Published: 10 May 2017
Corresponding Authors: MEHDI Heydari     E-mail:
Cite this article:

JAVAD Mirzaei, MEHDI Heydari, PREVOSTO Bernard. Effects of vegetation patterns and environmental factors on woody regeneration in semi-arid oak-dominated forests of western Iran. Journal of Arid Land, 2017, 9(3): 368-378.

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