2024-03-29T10:52:26+03:30 http://yujs.yu.ac.ir/jzfr/browse.php?mag_id=5&slc_lang=fa&sid=1
5-85 2024-03-29 10.1002
Journal of Forest Ecosystems Researches jfer 2423-4095 2423-4427 7 2016 3 1 Investigating Nutrient Quality and Litter Decomposition of Lebanon Oak (Quercus libani) in Early Stages of Decomposition Process in the Northern Zagros Forests (Case Study: Hoare Khul Forests in the City of Baneh) Farhad Ghasemi Aghbash ghasemifarhad@yahoo.com Geshin Allah Veisi gashin.alahvaisi@gmail.com Vahid Hosseini vahidit@yahoo.com Litter decomposition is the most important way of nutrient entering to soil and soil nutrient availability is highly related to dynamics of nutrients and litter decomposition in the forest ecosystems. This study aimed to evaluate the dynamics of nutrients and litter decomposition in the northern Zagros forests using litterbag technique for 180 days in the Khul Hoare forests located in Baneh city. The litter bags were collected at intervals of 30, 60, 120 and 180 days and the rate of leaf litter decomposition and chemical compounds such as nitrogen, carbon, phosphorus, potassium and calcium were measured. The results showed there was no significant correlation between the rate of decomposition and the initial composition of nutrients and also C: N and C: P ratios. Due to the qualification of leaf litter based on the amount of nitrogen in this study, the average amount of nitrogen in Quercus libani was 1.37%. So Lebanon oak can be classified in the average group and it can be considered as a soil improver species. In the studied litter, phosphorus and nitrogen had a similar performance and their concentration increased over time (7.27 and 30.38 mg/g respectively). While concentration of elements such as calcium, potassium and magnesium was decreased. The nutrient concentration of Quercus libani leaf litter was Ca>N>P>K> Mg. Litter decomposition Northern Zagros Nutrient Litter bags Nitrogen 2016 9 01 1 17 http://yujs.yu.ac.ir/jzfr/article-1-85-en.pdf
5-70 2024-03-29 10.1002
Journal of Forest Ecosystems Researches jfer 2423-4095 2423-4427 7 2016 3 1 Monitoring and predicting changes in vegetation density using remote sensing (Case study: Venet watershed, Ilam province) vahid mirzaei zadeh vahidmirzaei6764@gmail.com maryam niknejad maryam612niknejad@yahoo.com mehdi haydari m_heydari23@yahoo.com The importance of vegetation as a dynamic factor affecting the biological conditions requires that a detailed qualitative and quantitative information about its changes be prepared in short intervals. In this study, in order to monitor and predict vegetation density in Venet watershed in Ilam province the Normalized difference vegetation index (NDVI) and Landsat images from 1988 and 2007 was used and vegetation density maps in three classes without canopy cover, thinned and dense canopy covers were prepared. Comparing the extent of vegetation density classes indicated that the extent of bare soil areas have increased as 1158/837 hectares while the extent of thinned and dense canopy covers 360/8277 and 797/9544 hectares respectively has been reduced. Assessing changes in vegetation density showed that from the classes with thinned and dense canopy covers as 1233/4828 and 210/4539 ha respectively have become no vegetation cover class. Also as 246 /2742 and 38 /8255 hectares of the bare soil areas have been converted to thinned and dense canopy cover classes respectively. Using Markov models and automated cells to predict changes in vegetation density showed that the highest and lowest probability of transition to no vegetation cover lands has been seen respectively in thinned (0.5059) and dense canopy cover (0.1023) lands. Finally, assuming a continuation of current trends, watershed vegetation density map of the target for 2020 was forecast. This map shows in the near future the land without vegetation cover will devote itself about 87 percent of this region. vegetation cover density Markov models Automated cell Venet watershed Zagros. 2016 9 01 19 32 http://yujs.yu.ac.ir/jzfr/article-1-70-en.pdf
5-79 2024-03-29 10.1002
Journal of Forest Ecosystems Researches jfer 2423-4095 2423-4427 7 2016 3 1 Phenology of Persian Oak (Quercus brantii Lindl.) in Three Different Sites in Fars Province, Iran majed hesami m45hesami@gmail.com saeiid Davazdahemami s. 12emami@yahoo.com Phenology studies can be appliedin sustainable management, protection, rehabilitation, development, and utilization of forest resources. In this study, the phenology of  Persian oak was investigated in three forested areas of Mamasani, Dasht-e-Arjan and Kamfirouz with 2300 m,2100 m,1800 m altitude, respectively in south –west and north of Fars province, Iran. In each area, ninetrees were visited repeatedlyat different times in different seasons during 5 years (1998-2002) and the observed characteristics were recorded. The results showed the stages of growth were completely different at the threementioned areas. The shoots sprouted up in the second week of March to the first week of April. The full leaf formation happened in the second week of April to the fourth week of April. The early flowers appeared in the second week of March to the fourth week April. Pollination occurred in the third week of March to the third week in April. The leaves began to fall in the fourth week of October to the fourth week of December. So characteristics of phenology in Persian oak were affected by climate and environmental factors. Quercus brantii L. Forest Fars Phonology Oak fruit 2016 9 01 33 46 http://yujs.yu.ac.ir/jzfr/article-1-79-en.pdf
5-51 2024-03-29 10.1002
Journal of Forest Ecosystems Researches jfer 2423-4095 2423-4427 7 2016 3 1 The Role of Topographic and Edaphic Factors in Mortality of Trees in Middle Zagros Persian Oak (Quercus brantii) Forests Ahmad Hossieni ahmad.phd@gmail.com Mohsen Hossieni hOSSEINI@modares.ac.ir Oak decline is a complex phenomenon that oak forests are faced with it across the world and Iran. Shalam forested area located in north of Ilam province was selectedto determine the role of topographicand some edaphic factors in tree mortality happened in Persian oak forests. The study region was divided into 20 homogeneous topographic units. Within each homogeneousunit,three 0.1-haplots  were randomly-systematically established for measuring the rate of tree mortality and oneprofile was prepared for characterization ofsome  physical and chemical soil characteristics (texture, moisture content, TNV%, OC% and N for each soil layer, and soil depth). In each plot,diameter at breast height (DBH), maximum and minimum crown diameters, crown dieback percent, origination and form of trees and shrubs for all species and site variables weremeasured. Results showed that 15.7% of forest stock had reduced while 97.65% of it belonged to Persian oak species. The results of multiple linear regression and RDA showed that tree mortality was significantly affected by elevation and aspect, but not by slope. The highestrate of tree mortality was observedin high elevation and south and west aspects. Also the results of multiple linear regression and RDA showed that tree mortality was significantly affected by soil depth and texture. So, the highestrate of tree mortality was observed in soils with less depth, less sand% and more silt%. It was concluded that topography and soil have effective role in tree mortality and its expansion across Zagros forests. Identifying the critical conditions in terms of topography and soil in these forests can help and be useful in the management of tree dieback. Topography Tree mortality Soil Persian oak forests Drought 2016 9 01 47 58 http://yujs.yu.ac.ir/jzfr/article-1-51-en.pdf
5-68 2024-03-29 10.1002
Journal of Forest Ecosystems Researches jfer 2423-4095 2423-4427 7 2016 3 1 The Effect of Seed Source on Germination and Morphological Traits of Amygdalus elaegnifolia Saplings Undersalt Stress Anahita Rashtian s61_naseh@yahoo.com afagh tabandeh saravi arashtian@yazd.ac.ir somaya Naseh Dehabanda tabandeh@yazd.ac.ir Salinity is one of environmental stresses in the world and especially in arid lands and desert that reduces production of plants and it is important to choose salt-resistant plants in all life stages, especially germination. The aim of this study was to investigate the effect of seed source (provenance (on germination and morphological traits of Amygdalus elaegnifolia saplings undersalt stress. The experiment was carried out as factorial in completely randomized design  withthree replicates. Seed source (FereydonShahr, Kazeron and Semirom) and salinity treatment withfour levels (0, 1.5, 3 and 5 dSm-1) using NaCl were considered as first and  second factors, respectively. The measured variables were germination percentage, germination rate, vigor index, shoot length, radicle length, shoot wet weight, radicle wet weight, shoot dry weight, radicle dry weight, total leaf number, and radicle length/shoot length. The results of analysis of variance and mean comparison showed that salinity made significant differences in most of the investigated traits of Amygdalus elaegnifolia. In the control treatment of salinity, significant differences were found among the studied seed sources but the effect of seed sources was not significant in the other levels of salinity. In general, Fereydunshahr was the best of all studied provenances in non-saline conditions (control treatment).   Amygdalus elaegnifolia Provenance Salt stress Seed germination 2016 9 01 59 73 http://yujs.yu.ac.ir/jzfr/article-1-68-en.pdf
5-93 2024-03-29 10.1002
Journal of Forest Ecosystems Researches jfer 2423-4095 2423-4427 7 2016 3 1 Investigation on Important Causes of Beetle Attack to Amygdalus scoparia Trees in Central Zagros Bagh-shadi, Harat, Yazd Asghar Mosleh Arani amosleh@yazd.ac.ir Mohamad hossein Molakhalili molakhalili@yahoo.com Bahman Kiani Kiani@yazd.ac.ir To investigate some effective causes of beetle attack to Amygdalus scoparia in Bagh Shadi Harat, Yazd 80 sampling plots were randomly selected. In each plot number of infected tree, percent of dryness for each tree, height, diameter at root collar and crown diameter of each tree, elevation, slope and aspect of each plot were measured or recorded. Results showed that beetle infection were positively correlated to dryness of Amygdalus scoparia, Loranthus Grewinkii and negatively to tree sprouting. Beetle infection were also positively correlated to density of Amygdalus scoparia, density and coverage of accompany species, number of dried Amygdalus scoparia and negatively to percentage of slop. It is concluded that beetles prefer habitat with denser and more coverage population of Amygdalus scoparia in flat area and on trees with less sprouting. Since the study area is an important conserved place in Yazd province, research to control the pest can be very important. Elimination of effected and old trees may limit growth of pests in this area. Dryness Beetle Pests Topography Wild almond 2016 9 01 75 86 http://yujs.yu.ac.ir/jzfr/article-1-93-en.pdf