The trend of dieback and decline of oak forests (Case study: Totshami and Barzeh forests of Kermanshah province)

Document Type : Scientific Letters

Authors

1 Research Expert, - Forest and Rangeland Research Department, Kermanshah Agricultural and Natural Resources Research and Education Center,

2 Associate Prof, Chaharmahal and Bakhtiari Agricultural and Natural Resources Research and Education Center

3 Associate Prof, Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran

4 Assistant Professor, Forest and Rangeland Research Department, Kermanshah Agricultural and Natural Resources Research and Education Center, AREEO, Kermanshah, Iran

5 Associate Prof,, Forests and Rangelands Research Department, Kermanshah Agricultural and Natural Resources Research and Education Center, (AREEO), Kermanshah, Iran.

10.22092/irn.2022.359029.1469

Abstract

This study is to monitor the drying and decline of oak trees in four levels of drought in two forest areas (with deterioration and control) of the forest masses of Kermanshah province for three consecutive years. The results of this trend showed that the number of healthy trees decreased from 31 % at the beginning of the study to 10% at the end of the period in the Tootshami sample. This trend is reduced from 45% to 28% in the Barzeh sample (less dryness) and has been transferred to other drying classes. Also, the analysis of the results of dryness with seedling and coppice regeneration trees showed that in the Tootshami sample, 77 % and Barzeh, 65% Copic trees had different levels of dryness. The highest dryness ratio in Tootshami, with 43% related to class (drying up to 50%) and in Baereh, with 52% related to class (Dieback) was observed.

Keywords

References

Schomaker, M.E., Zarnoch, S.J., Bechtold, W.A., Latelle, D.J., Burkman, W.G. and Cox, S.M., 2007. Crown-condition classification: a guide to data collection and analysis. Southern Research Station, U.S., 92 p.
Steinman, J.R., 2000. Tracking the health of trees over time on forest health monitoring plots. International conference on the inventory and monitoring of forested ecosystems, 1998 August 16-19, pp. 334-339.
Iran Nature
Volume 7, Issue 5 - Serial Number 36
November and December 2022
Pages 35-40

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