Natural Regeneration Within Natural and Man-Made Canopy Gaps in Caspian Natural Beech (
 Fagus Orientalis
 Lipsky) Forest, Northern Iran

Mohammadi, Leila; Mohadjer, Mohammad Reza Marvi; Etemad, V; Sefidi, Kiomars; Nasiri, Nasrin

doi:10.1080/10549811.2019.1611453

Cited by 5 publications

(3 citation statements)

References 22 publications

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“…Our findings showed that the highest density of the beech saplings in the unmanaged compartment (4.2 ± 1.1 SE) was in the small gaps, which is consistent with the results of other studies (Tabari et al 2005;Amiri et al 2015) in intact beech forests. However, the gap size had no significant effect (P < 0.05) on this characteristic in the managed compartment, which is consistent with the results of Mohammadi et al (2019) and Sefidi et al (2011) who showed the size of the gap in natural and manmade gaps did not have a significant effect on the abundance and diversity of the seedlings in a northern Iran Khairudkenar forest. Previous studies have shown that the presence of advanced regeneration explains the lack of a significant relationship between the regeneration density and the gap size (Nagel et al 2010).…”

Section: Discussionsupporting

confidence: 88%

“…Due to the importance of gaps and regeneration in temperate forests, many researchers have studied their characteristics. Some studies have shown that the height of the Oriental beech saplings under the closed canopy was significantly higher than within the gaps (Nasiri et al 2017) and the abundance of beech saplings had a significant negative correlation with the gap size in both natural and man-made canopy gaps (Mohammadi et al 2019). In some studies, the gap size has been introduced as an effective factor in the establishment of beech regeneration (Vilhar et al 2015;Feldmann et al 2018).…”

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confidence: 99%

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Managed vs. unmanaged Fagus orientalis Lipsky forests: Structure and diversity of natural regeneration in northern Iran

Parhizkar¹,

Hallaj²,

Hassani³

2022

J. For. Sci.

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The predominant natural disturbance regime within an old-growth Oriental beech (Fagus orientalis Lipsky) forest has been imitated in order to continue the forest cover. It is unclear how much the silvicultural characteristics of regeneration in a managed forest differ from those in an unmanaged old-growth forest subject only to natural dynamics. In this study, we compared important quantitative (e.g. height, collar diameter, crown width, length of spring shoot on the main stem and length of the uppermost internodes) and qualitative (e.g. healthy, mode of branching and stem form) silvicultural characteristics of beech saplings within the gaps between an unmanaged old-growth Oriental beech compartment and a managed forest in the northern Iran ten years after a single harvest entry using a single-tree selection. Canopy gaps larger than 100 m2 with visible remnants of gapmakers (i.e. stumps) were included in this study. The saplings’ characteristics of both compartments were within typical ranges for an old-growth beech forest. Small, but important differences were also observed. The value of beech saplings’ density in the managed compartment (4.9 ± 0.7 SE) was significantly (P < 0.05) higher than the unmanaged one (3.4 ± 0.6 SE). Conversely, the value of the Menhinick Richness index in the unmanaged one (0.96 ± 0.05 SE) was significantly (P < 0.01) higher than the managed compartment (0.80 ± 0.04 SE). The sapling spring shoot length in the unmanaged compartment (13.3 ± 1.7 SE) was also significantly (P < 0.01) higher than the managed one (7.3 ± 0.7 SE). Relying on beech trees in a managed compartment will hamper the stability of future forest stands. The imitation of the old growth forest must be complete. To increase the resistance of the forest stands to adverse conditions, pay attention to the tree species richness at the time of marking.

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Section: Discussionsupporting

confidence: 88%

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confidence: 99%

Managed vs. unmanaged Fagus orientalis Lipsky forests: Structure and diversity of natural regeneration in northern Iran

Parhizkar¹,

Hallaj²,

Hassani³

2022

J. For. Sci.

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“…Analysis. The canopy gaps were analysed on the basis of three size classes including small (< 200 m 2 ), medium (200-500 m 2 ), and large (> 500 m 2 ) gaps (Sefidi et al 2011;Mohammadi et al 2019). In order to analyse the spatial pattern of gaps, univariate Ripley's L-function was used in the current research (Ripley 1976).…”

Section: Methodsmentioning

confidence: 99%

Distribution attributes of natural canopy gaps in the Hyrcanian mixed-oriental beech forests

Mataji¹,

Vahedi²

2021

J. For. Sci.

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One of the most important issues indicating the quality and quantity of forest ecosystems is the distribution of natural disturbances resulting in canopy gaps (CGs). The present study was conducted in one of the Hyrcanian beech forests in northern Iran in summer 2018. The gap areas were classified into small (< 200 m2), medium (200‒500 m2) and large gaps (500–1 000 m2) on the basis of full inventory. The univariate Ripley’s L-function was used for introducing the CG spatial pattern. Furthermore, mark correlation function (MCF) and density function (DC) in turns were used for verifying the correlation and frequency of CG size classes in each pattern. The results showed patterns of the gaps in each size class and integrated by the three size classes, they were random and cluster, respectively. Furthermore, the MCF revealed that the gap size classes were independently located in the clusters. The total frequency of the small, medium and large gaps in turns was 32, 49 and 19%, respectively. Although the density share of medium and small gaps in turns was more frequent than the large gap density in the study forest, the results of DC indicated that the frequency of each gap size class was random within each cluster, regardless of their density share. Based on the natural gap aggregations, the base circular mosaic with an area of 5 000 m2 can be introduced for monitoring and specifying the forest stand dynamics.

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Effects of single tree selection cutting on vascular plant species diversity components in temperate forests of Hyrcanian region

Khanalizadeh

Rad

Amiri

et al. 2023

Flora

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Natural Regeneration Within Natural and Man-Made Canopy Gaps in Caspian Natural Beech ( Fagus Orientalis Lipsky) Forest, Northern Iran

Cited by 5 publications

References 22 publications

Managed vs. unmanaged Fagus orientalis Lipsky forests: Structure and diversity of natural regeneration in northern Iran

Managed vs. unmanaged Fagus orientalis Lipsky forests: Structure and diversity of natural regeneration in northern Iran

Distribution attributes of natural canopy gaps in the Hyrcanian mixed-oriental beech forests

Effects of single tree selection cutting on vascular plant species diversity components in temperate forests of Hyrcanian region

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