EFFICIENCY OF NEAREST NEIGHBOR INDICES TO ASSESS STRUCTURE OF FAGETO-CARPINETUM IN HYRCANIAN VEGETATION ZONE (CASE STUDY: NAVE ASALEM-GUILAN FORESTS-IRAN)

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FARHADI P.; SOOSANI J.; ERFANIFARD S.Y.; AKHTARI M.H.

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Journal: Journal of Wood and Forest Science and Technology Year:2017 | Volume:24 | Issue:2 Page(s): 17-32

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Title

EFFICIENCY OF NEAREST NEIGHBOR INDICES TO ASSESS STRUCTURE OF FAGETO-CARPINETUM IN HYRCANIAN VEGETATION ZONE (CASE STUDY: NAVE ASALEM-GUILAN FORESTS-IRAN)

Author(s)

FARHADI P. | SOOSANI J. | ERFANIFARD S.Y. | AKHTARI M.H. | Issue Writer Certificate

Keywords

SPATIAL PATTERNQ2

ECOLOGYQ3

SPECIES DIVERSITYQ2

NAVE ASALEM FORESTSQ1

NEAREST NEIGHBOR INDICESQ1

Abstract

Background and objectives: Maintaining the structure and biodiversity of ecosystems is considered to be one of the most important goals of modern forestry. For this purpose, tools are needed for forest management, to investigate the current status, as well as the changes caused by development of forest management activities with spending the lowest cost and time. Indicators of the nearest neighbor have advantages that their application gives them priority to direct measurements of biological diversity. Because in addition to study SPECIES DIVERSITY, they investigate the locations of trees. Furthermore, NEAREST NEIGHBOR INDICES provide valuable information about ecological interactions of trees in forests. Therefore, this study was aimed to apply important indices based on nearest neighbor analysis to study ecological relationships of trees in beech-hornbeam stands in Nave Asalem- Giulan forests.Materials and methods: In order to do this research, seven 1-ha plots with homogeneous environmental conditions were inventoried in a Fageto-Carpinetum association in Nave Asalem- Giulan. In each plot distance, type of species, diameter at breast height and azimuth all trees on the plot with more than 7.5 cm diameter at breast height were recorded also registered of from the center of sampling area. The SPATIAL PATTERN and SPECIES DIVERSITY were then investigated using the uniform angle, mean directional, species mingling and segregation indices. The amounts of each mentioned indic were individually calculated for each plot. The average of the values obtained for each plot was calculated for the Fageto-Carpinetum.Results: In seven 1-ha plots, the results showed that Fageto- Carpinetum, Fagus orientalis, Carpinus betulus, Acer cappadocicum, Acer velutinum and Alnus subcordatahad the maximum density per hectare. The values of uniform angle and mean directional indices were 0.53 and 2.02, respectively, showing a spatial distribution between random and clustered. In terms of SPECIES DIVERSITY, Fageto- Carpinetum association (an average of 0.47 and 0.25 for species mingling and segregation indices, respectively) presented a medium level of species mixing. The amount of species mingling indices indicated low level of mixing of beech species and high level of mixing of other species. Segregation index showed a pair of trees or nearest neighbor reference trees belonged to different species.Conclusion: In general, the results of this study indicated the efficiency of NEAREST NEIGHBOR INDICES to study the structure of Fageto- Carpinetum associations and the results can be used for planning to revitalize the structure and status of biodiversity in degraded Fageto-Carpinetum associations.

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APA: Copy

FARHADI, P., SOOSANI, J., ERFANIFARD, S.Y., & AKHTARI, M.H.. (2017). EFFICIENCY OF NEAREST NEIGHBOR INDICES TO ASSESS STRUCTURE OF FAGETO-CARPINETUM IN HYRCANIAN VEGETATION ZONE (CASE STUDY: NAVE ASALEM-GUILAN FORESTS-IRAN). JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY, 24(2), 17-32. SID. https://sid.ir/paper/156623/en

Vancouver: Copy

FARHADI P., SOOSANI J., ERFANIFARD S.Y., AKHTARI M.H.. EFFICIENCY OF NEAREST NEIGHBOR INDICES TO ASSESS STRUCTURE OF FAGETO-CARPINETUM IN HYRCANIAN VEGETATION ZONE (CASE STUDY: NAVE ASALEM-GUILAN FORESTS-IRAN). JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY[Internet]. 2017;24(2):17-32. Available from: https://sid.ir/paper/156623/en

IEEE: Copy

P. FARHADI, J. SOOSANI, S.Y. ERFANIFARD, and M.H. AKHTARI, “EFFICIENCY OF NEAREST NEIGHBOR INDICES TO ASSESS STRUCTURE OF FAGETO-CARPINETUM IN HYRCANIAN VEGETATION ZONE (CASE STUDY: NAVE ASALEM-GUILAN FORESTS-IRAN),” JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY, vol. 24, no. 2, pp. 17–32, 2017, [Online]. Available: https://sid.ir/paper/156623/en

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