Investigating the composition and species diversity of coppice with standard (CWS) stands in Arasbaran forests

Document Type : Scientific article

Authors

1 Associate Professor, Department of Forestry, Ahar Faculty of Agriculture and Natural Resources, University of Tabriz, Ahar, I. R. Iran

2 Ph.D. of Forestry, Faculty of Natural Resources, Urmia University, Urmia, I. R. Iran

Abstract

Quantitative description of forest stands in terms of the composition and species diversity is used as one of the most important tools in forest management. This research investigates the composition and species diversity of the coppice with standard stands of Arasbaran forests. In order to carry out this research, 24 rectangular sample plots with an area of ​​half a hectare (with dimensions of 50 meters by 100 meters) were randomly surveyed in the study area. Inside these samples, the structural characteristics of the stands, including the species, Coppice shoots, the diameter and the height of the sprout-clump, were measured using the 100% statistical method. Shannon-Wiener diversity index, Margalf richness and Pylo's uniformity were used to check biodiversity. The results showed that Carpinus betulus L. (63.8 percent) was the dominant species and Quercus macranthera (26.7 percent) and Acer campestre (4.5 percent) were among the species with the highest abundance. The average height and DBH were 6.45 meters and 12.14 cm, respectively. The highest and lowest values ​​of the biodiversity index are related to the Pylo index (1.01) and the Margalef index (0.71). The research showed that the diagonal distribution of the stand indicates that the stand is of the same age and young, and the bell shape of the height distribution also indicates the accumulation of the most searches in the middle altitude classes.

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