INVESTIGATION ON THE VERTICAL STRUCTURE AND SPATIAL ASSOCIATIONS OF FAGUS ORIENTALIS LIPSKY USING O-RING FUNCTION IN KHEYROUD FOREST, NOWSHAHR

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NOURI ZAHRA; ZOBEYRI MAHMOUD; FEGHHI JAHANGIR; MARVIE MOHADJER MOHAMMAD REZA

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Journal: Journal of Forest and Wood Products Year:2016 | Volume:69 | Issue:1 Page(s): 15-27

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Title

INVESTIGATION ON THE VERTICAL STRUCTURE AND SPATIAL ASSOCIATIONS OF FAGUS ORIENTALIS LIPSKY USING O-RING FUNCTION IN KHEYROUD FOREST, NOWSHAHR

Author(s)

NOURI ZAHRA | ZOBEYRI MAHMOUD | FEGHHI JAHANGIR | MARVIE MOHADJER MOHAMMAD REZA | Issue Writer Certificate

Keywords

FAGUS ORIENTALIS LIPSKYQ1

KHEYROUD FORESTQ1

O-RING FUNCTIONQ1

SPATIAL ASSOCIATIONSQ1

SPATIAL POINT PATTERNQ2

AND VERTICAL STRUCTUREQ1

Abstract

This study aims at analyzing the spatial pattern and associations of oriental beech (Fagus oriantalis Lipsky) in different vertical classes in intact beech forests. Data collection was done in 25 ha oriental beech sample plot in Gorazbon district of educational and experimental forests of University of Tehran. Species and DBH of all trees with DBH > 7.5 cm were recorded. The location of each tree was determined using azimuth and distance method in order to map the tree positions. Height of trees was calculated using diameter – height model developed for Gorazbon district. Trees were then divided in 4 Height classes: <15 m (S), 15- 25m (L), 25-35 m (M) and >25 m (U). Number of trees in vertical layers of S, L, M and U was 32, 63, 55 and 17 per hectare, respectively. Univariate O-ring statistic was used to analyze the spatial patterns of Fagus orientalis at different tree height classes, and the bivariate O-ring statistic was used to analyze the interspecies SPATIAL ASSOCIATIONS among these height classes. Programita software was used for all analysis. Results showed spatial pattern of oriental beech in height class (S) was clustered. In height class (L), spatial pattern was clustered up to distance of 21 m and then changed to random pattern. In height class (M), spatial pattern was aggregated up to distance 8 meter and then changed to random pattern and in height class (U), oriental beech showed random spatial pattern in all distances. Bivariate O-ring analysis showed positive correlation between trees at height class (S) and other height classes up to 30-40 m. Present study showed application of O-ring statistic in vertical structure analysis of forest ecosystems.

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APA: Copy

NOURI, ZAHRA, ZOBEYRI, MAHMOUD, FEGHHI, JAHANGIR, & MARVIE MOHADJER, MOHAMMAD REZA. (2016). INVESTIGATION ON THE VERTICAL STRUCTURE AND SPATIAL ASSOCIATIONS OF FAGUS ORIENTALIS LIPSKY USING O-RING FUNCTION IN KHEYROUD FOREST, NOWSHAHR. JOURNAL OF FOREST AND WOOD PRODUCTS (JFWP) (IRANIAN JOURNAL OF NATURAL RESOURCES), 69(1), 15-27. SID. https://sid.ir/paper/162953/en

Vancouver: Copy

NOURI ZAHRA, ZOBEYRI MAHMOUD, FEGHHI JAHANGIR, MARVIE MOHADJER MOHAMMAD REZA. INVESTIGATION ON THE VERTICAL STRUCTURE AND SPATIAL ASSOCIATIONS OF FAGUS ORIENTALIS LIPSKY USING O-RING FUNCTION IN KHEYROUD FOREST, NOWSHAHR. JOURNAL OF FOREST AND WOOD PRODUCTS (JFWP) (IRANIAN JOURNAL OF NATURAL RESOURCES)[Internet]. 2016;69(1):15-27. Available from: https://sid.ir/paper/162953/en

IEEE: Copy

ZAHRA NOURI, MAHMOUD ZOBEYRI, JAHANGIR FEGHHI, and MOHAMMAD REZA MARVIE MOHADJER, “INVESTIGATION ON THE VERTICAL STRUCTURE AND SPATIAL ASSOCIATIONS OF FAGUS ORIENTALIS LIPSKY USING O-RING FUNCTION IN KHEYROUD FOREST, NOWSHAHR,” JOURNAL OF FOREST AND WOOD PRODUCTS (JFWP) (IRANIAN JOURNAL OF NATURAL RESOURCES), vol. 69, no. 1, pp. 15–27, 2016, [Online]. Available: https://sid.ir/paper/162953/en

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