Investigating the relationship between some tree characteristics, forest stands and physiographic factors with the rate of dieback

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

Dezfuli H.; BADEHIAN Z.; NAGHAVI H.; Mahdi Karami Sh.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: Journal of Wood and Forest Science and Technology Year:2019 | Volume:26 | Issue:3 Page(s): 69-82

Download Full-Text

Persian Verion

View:

346

Download:

Cites:

Information Journal Paper

Title

Investigating the relationship between some tree characteristics, forest stands and physiographic factors with the rate of dieback

Author(s)

Dezfuli H. | BADEHIAN Z. | NAGHAVI H. | Mahdi Karami Sh. | Issue Writer Certificate

Keywords

Crown densityQ1

Sprout-clumpsQ2

Oak declineQ1

Life formQ2

Species LocationQ1

Abstract

Background and Objectives: In recent years, Zagros, as the largest forest ecosystem in Iran, have been affected by the Oak decline phenomenon. Oak decline can occur simultaneously in different geographic regions by completely different or identical stressors and lead to the death of oak trees. Tree mortality decreases both forest quality and quantity and has a negative effect on the ecosystem performance by decreasing the density of the stand, changing the abundance of tree species, reducing the canopy cover and changing the structure of the forests. Therefore the present study was carried out with the aim of determining the relationship between some tree characteristics, forest stand and physiographic factors with the rate of dieback. Materials and Methods: In 50 hectare of this forest by a random systematic grid (100*100) 42 circular sample plots with 1500 m2 area were selected. The layers of slope in two categories, aspect, and altitude in two categories were prepared. In each sample plot the structural characteristics of stand such as; diameter at breast height, Crown area, Crown density (open, medium, closed), tree height, number of sprouts, tree origin, tree position, and dieback rate (in four classes including healthy: less than 5%, poor crown dieback: 33-5%, average crown dieback: 66-34%, severe crown dieback: more than 66%) were measured and recorded. Results: The results showed that the relationship between dieback rate with trees origin, tree height, and stand density was significant. However, there was no significant relationship between dieback rate and the diameter at breast height (DBH), the number of sprouts and crown area (canopy). The trees located on aggregated group had the higher rate of dieback than individual trees. The relationship between physiographic factors with dieback rate showed that there was no significant relationship between slope and dieback. The rate of dieback in southern aspect and in higher elevations was higher. Conclusion: Most of the diebacks belong to the 4th and 1st classes. If the current trend along with frequent droughts continues, the trees are transferred from lower classes to higher classes. In such a situation it is impossible to restore the forest to the natural state, but if escalating factors are managed and human intervention is controlled in the nature, the current situation can be kept constant, or even given the evidence of the presence of sprout shoots, it is hoped to restore the forest.

Cites

No record.

References

No record.

Cite

APA: Copy

Dezfuli, H., BADEHIAN, Z., NAGHAVI, H., & Mahdi Karami, Sh.. (2019). Investigating the relationship between some tree characteristics, forest stands and physiographic factors with the rate of dieback. JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY, 26(3 ), 69-82. SID. https://sid.ir/paper/369181/en

Vancouver: Copy

Dezfuli H., BADEHIAN Z., NAGHAVI H., Mahdi Karami Sh.. Investigating the relationship between some tree characteristics, forest stands and physiographic factors with the rate of dieback. JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY[Internet]. 2019;26(3 ):69-82. Available from: https://sid.ir/paper/369181/en

IEEE: Copy

H. Dezfuli, Z. BADEHIAN, H. NAGHAVI, and Sh. Mahdi Karami, “Investigating the relationship between some tree characteristics, forest stands and physiographic factors with the rate of dieback,” JOURNAL OF WOOD AND FOREST SCIENCE AND TECHNOLOGY, vol. 26, no. 3 , pp. 69–82, 2019, [Online]. Available: https://sid.ir/paper/369181/en

Related Journal Papers