Assessing Impact of Physiographic Factors on Spatial Distribution Patterns of Oak Trees in Iran

Mirzaei, Mehrdad; Bonyad, Amir Eslam; Aziz, Jalal

doi:10.4172/2168-9776.1000190

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…These ndings are consistent with the results presented by Karamian and Mirzaei (2020). However, the results are inconsistent with the ndings of Mirzaei et al (2019).…”

Section: Tree Diebackcontrasting

confidence: 79%

The effect of altitude above sea level on some structural characteristics, dynamics and diversity on Zagros forests in western Iran

Haidari,

pour

2024

Preprint

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Ecological conditions, such as environmental gradients, can affect the structural features and diversity of forests situated in altitude gradients. A study was conducted to examine the impact of altitude above sea level on certain structural features and diversity in Zagros forests in the Ghalajeh area of Kermanshah province. To analyze the effects of diversity on structural and habitat characteristics and their changes in different altitude gradients, eight sites were selected in four altitude ranges from sea level: 1200–1475 meters (low-land), 1475–1750 meters (low to mid-altitude), 1750–2025 meters (mid to high-altitude), and 2025–2300 meters (high-land), identified in both northern and southern slopes. In each site, three sample plots were chosen as replicates, and within each sample plot, all necessary characteristics of trees were measured. The results showed that with increasing altitude above sea level, the number and frequency of tree species increased, while the density of Iranian oak trees decreased. Species such as Almond tree (Prunus elaeagrifolia), Italian Honeysuckle (Lonicera nummulariifolia), and Maple tree (Acer monospessulanum) were predominantly present at higher altitudes. However, the presence of trees initially increased (in the mid-altitude elevation), then decreased (in the highland elevation) with increasing altitude, although this attribute was nearly equal in the lowland elevation in both northern and southern slopes. The study also found statistically significant differences (p < 0.05) in variables such as tree diameter at breast height, tree height, and tree dieback levels across different altitudes above sea level. These results are beneficial in addressing ecological issues such as forest conservation and management, as well as assessing favorable environmental conditions, providing insights to predict future trends based on these findings.

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“…These ndings are consistent with the results presented by Karamian and Mirzaei (2020). However, the results are inconsistent with the ndings of Mirzaei et al (2019).…”

Section: Tree Diebackcontrasting

confidence: 79%

The effect of altitude above sea level on some structural characteristics, dynamics and diversity on Zagros forests in western Iran

Haidari,

pour

2024

Preprint

View full text Add to dashboard Cite

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Spatial area distribution of Oaks according to different selected parameters in Türkiye

Fosso

Karahalil

2023

Ormancılık Araştırma Dergisi

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Considering the forest management plans prepared recently, the Oaks, which were previously represented by a single nickname (Quercus spp), are now separated based on species. Although there are forest management plans using old pseudonyms that are still in use, plans that have expired are being renewed considering Oak species distinction. There is no study that provides up-to-date information on the spatial distribution, mixture status, and stands’ distribution according to age, site and canopy classes. However, such studies provide useful information at many levels, from sectorial planning for example to revealing honey production efficiency. In this study, the spatial distribution of Oaks according to the different parameters mentioned above was examined by using the spatial database obtained from the General Directorate of Forestry. ArcGIS 10.8TM software was used to query the attribute data and present it in tables and figures. According to the results obtained, there are a total of 9.05 million ha of Oak stands. Within this, 6.116.992,7 ha (67,6%) are pure or mixed within Oak species, and 2.928.775,9 ha (32,4%) are mixed. Pure and mix stands within Oak species have 2.075.508,4 ha of productive (33,9%) and 4.041.484,3 ha degraded (66,1%). Moreover, 4.986.288,1 ha (81,5%) are managed as high forest and 1.130.704,6 ha (18,5%) are managed as coppice. Considering their developmental stage and crown closure (excluding degraded stands), 94,5% of those were less than 20 cm in dbh (diameter at breast height), and 44,1% of them having more than 70% of the cover. As conclusion, it is recommended that Oaks should be given with mentioned parameters, when publishing forestry statistics.

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Assessing Impact of Physiographic Factors on Spatial Distribution Patterns of Oak Trees in Iran

Cited by 2 publications

References 9 publications

The effect of altitude above sea level on some structural characteristics, dynamics and diversity on Zagros forests in western Iran

The effect of altitude above sea level on some structural characteristics, dynamics and diversity on Zagros forests in western Iran

Spatial area distribution of Oaks according to different selected parameters in Türkiye

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