Effects of plot size on assessment of tree species diversity in Caspian forests of Iran

MIRZAZADEH, AMER; Pourbabaei, Hassan; Daryaei, Mehrdad Ghodskhah; Bonyad, Amir Eslam

doi:10.13057/biodiv/d230957

Cited by 1 publication

(3 citation statements)

References 26 publications

(30 reference statements)

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“…The Shannon-Wiener Index (H') was used due to its greater sensitivity to the abundance of rare species. Also, the Simpson diversity Index (1-D) was used due to its sensitivity to species that are present in greater abundance (Pourbabaei et al 2012;Mirzazadeh et al 2022). The formulas are given in Table 1.…”

Section: Discussionmentioning

confidence: 99%

“…The sampling of canopy coverage used systematic random method with the sampling network size was 150 × 200 m. The starting point was randomly selected, and the sampling network was systematically located on the map (Figure 1). The forest inventory was conducted on 131 hectares, which included 20 and 30 sample plots in the managed and unmanaged forests, respectively (Mohammadnezhad-Kiasari et al 2020;Mirzazadeh et al 2022). The inventory operations of this research was done in the middle of the summer.…”

Section: Field Samplingmentioning

confidence: 99%

“…Furthermore, according to some studies, the partial and scattered exploitation of forest areas has caused an increase in plant species diversity compared to unmanaged forests (Hosseinpour et al 2019;Amini et al 2021). The implementation of forestry plans in managed forests affects the plant species diversity due to the protection of forest areas (Miller et al 2019;Rezaipoor et al 2022), forestation activities (Pourbabaei et al 2012), the implementation of silvicultural practices, the stand structure changes (Sefidi et al 2022), the creation of man-made canopy gaps (Amini et al 2021;Mirzazadeh et al 2022), road construction and the removal of wood from the forest (Mohammadnezhad-Kiasari et al 2020).…”

Section: Introductionmentioning

confidence: 99%

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Comparison of plant diversity between managed and unmanaged forests in Haftkhal, Mazandaran Province, North of Iran

MOHAMMADNEZHAD-KIASARI,

SAGHEB-TALEBI,

RAHMANI

et al. 2023

Asian J For

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Abstract. Kiasari MSh, Sagheb-Talebi Kh, Rahmani R, Ghelichnia H. 2023. Comparison of plant diversity between managed and unmanaged forests in Haftkhal, Mazandaran Province, North of Iran. Asian J For 7: 106-113. The relationship of plant diversity with silvicultural practices has not been fully understood for the oriental beech forests (Fagus orientalis Lipsky), which is a widespread forest tree in the Hyrcanian Region, Iran. The implementation of appropriate forestry practices in the oriental beech forests is therefore crucial in terms of sustainable forest management. Hence, assessing the impacts of silvicultural practices on plant diversity is essential with the regard to sustainable forest management. This study aimed to compare plant species diversity between two managed and unmanaged forest stands in Mazandaran Province, Iran. Forest inventory in an area of 131 ha was performed using in a systematic random sampling with a 150 × 200 m grid size. In addition, the area of sampling was 100 m2 (10 × 10 m). Twenty and thirty sampling plots were established in managed (compartment No. 8) and unmanaged (compartment No. 36) forests, respectively. Shannon-Wiener and Simpson Indices were used to calculate plant species diversity, while Margalef and Sheldon indices were used to determine species richness and evenness, respectively. The results revealed that 50 and 56 plant species were found in managed and unmanaged forests, respectively. Rosaceae, Asteraceae, and Fabaceae were the main families in these studied areas. This study showed that the diversity and richness of plants in the managed forest slightly increased compared to the unmanaged forest. On the other hand, the evenness of plants in the managed forest slightly decreased compared to the unmanaged forest. Changes in plant diversity indices between managed and unmanaged forests were not statistically significant. This research showed that forest management of oriental beech forests using the single-tree selection cutting has not reduced or weakened the diversity of plant species in the managed forest compared to the unmanaged forest.

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Section: Discussionmentioning

confidence: 99%

Section: Field Samplingmentioning

confidence: 99%