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Showing 2 results for Darabkola Forest
Seyed Ataollah Hosseini, Mannaneh Akbarimehr, Seyed Moahammd Hodjati, Fatemeh Sharyati, Aidin Parsakhoo,
Volume 11, Issue 2 (6-2023)
Abstract
Aims: In this study, the effects of age and cut slope characteristics of forest roads were investigated on the water quality properties of streams in Hyrcanian forest of Darabkola (Mazandaran province).
Material & Methods: Twelve points were randomly selected at four stations including road age (15 and 30 years) and cut slope (13, 15, 18 and 20%) and water and soil sampling was performed. Acidity, electrical conductivity, Total Dissolved Solids (TDS), Total Suspended Solids (TSS), nitrate, phosphate and ammonium were measured. Comparison of soil properties shows a significant difference at three points on the trench and at each station.
Findings: Results showed that the cut slope had a significant effect on all variables of the waterways. Among the studied variables of water quality, although pH and EC showed significant variations considering the utilization and road treatments, as the soil has many daily and temporary variations; definitive decisions cannot be made regarding the impact of utilization and characteristics of forest roads on them.
Conclusion: In conclusion, it can be stated that in the present study, the factors affecting the quality of waterways and the relative impact of anthropogenic and natural factors involved in water quality were determined. So, this study is a good starting point for further research on the details and objectives of forest management in order to preserve this ecosystem.
Mojtaba Amiri,
Volume 11, Issue 4 (12-2023)
Abstract
In this study, the response of individual trees and the stand structure to windstorm damage were investigated in a mixed broad-leaf forest stands located in Darabkola Forest, northern Iran. A full inventory was performed for all trees with diameter at breast height≥ 10cm and all damaged trees were identified within the study area. The number of the damaged trees varied with species, ranging from 0.04% (2 individuals) in Tilia begonifolia Stev to 53.7% (2709 individuals) in Fagus orientalis L. Among the damaged trees 5054 recorded, 2231 (44.20%) had been snapped and 787 (15.6 %) uprooted, and 2028 (40.20 %) were snags. Among the species, Fagus orientalis L. (47.7%), Alnus subcordata C. A. Mey. (19.7%) and Carpinus betulus L. (18.8%) were most susceptible to uprooting, whereas Populus caspica Bornm, Quercus castaneifolia C. A. Mey. and Ulmus glabra Huds. were the least susceptible to uprooting. Trees ≥60cm dbh were more likely to be snapped (78%) or snags (69%), whereas trees <60 cm dbh were more presumably to be uprooted (50%). Also, about one third (33%) of total trees larger than 60 cm (dbh) have showed distinct effects and individual trees >20 m were more commonly uprooted. Finding showed that Oriental beech and Common hornbeam to be species that were most susceptible to both being snapped and snagged, whereas Caucasian alder had the most uprooting damage among the other species. Overall, features like species, D.B.H, height and height to diameter ratio (H/D.B.H), were intensively related with the type and severity of windstorm damage.
