The Effects of Fire on Plant Regeneration and Species Diversity in Khorgam Forest, Rudbar
Subject Areas : جنگل ها و منابع طبیعی
Ansar Asali Talkoyi
1
,
Hasan pourbabaei
2
*
,
Mehrdad Ghodskhah Daryaei
3
1 - MSc., Faculty of Natural Resources, University of Guilan, Guilan, Iran
2 - Professor, Department of Forest Ecology, Faculty of Natural Resources, University of Guilan, Guilan, Iran
3 - Associate Professor, Department of Forest Pathology, Faculty of Natural Resources, University of Guilan, Guilan, Iran
Keywords: Forest fire, Forest restoration, Tree regeneration, Hyrcanian forests,
Abstract :
The aim of this study was to investigate the effects of fire on regeneration and plant species diversity in Khorgam forest, Rudbar city. In order to collect data, systematic-random sampling method with 150× 150 m dimension was used. In order to collect data, 30 sample plots of an area 400 m2 were surveyed. in the control and fire areas. In each sampling plot, all trees with a diameter at breast height (DBH) greater than 7.5 cm were measured. Microplots of 4 m² were used at the center and four corners of each plot to investigate regeneration and herbaceous cover percentage. Then, the number and type of saplings were measured in three classes, height less than 1.30 m, 0-2.5 and 2.5-7.5 cm DBH. Shannon-Wiener, Margalef and Smith-Wilson biodiversity indices were used in this research. For data analysis, statistical tests of Variance (ANOVA), Duncan, and independent t-test for comparing means were used. The results showed that the number of trees in the two fire and control areas is 230.33 and 237 trees per hectare, respectively. Also, the findings indicated that there is a significant difference between the abundance of beech and hornbeam species in the two fire and control areas. There was a significant difference in the tree layer between the fire and the control areas for all three diversity indices. The results of tree regeneration showed that the mean of regeneration in the control area is higher than in the fire area, and there is a significant difference between the two areas statistically. The results of diversity and richness indices in this layer did not reveal significant differences between these indices.
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