Department of Forest Science and Engineering, Faculty of Natural Resources, Tarbiat Modares University, Noor, Iran
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Extended Abstract
Introduction and Objectives: Hyrcanus boxwood is the only type of boxwood in the Hyrcanus forests of Iran and one of the few evergreen broadleaf trees in the Hyrcanus forests. The present study intends to investigate the effect of the boxwood moth pest on the above-below-ground vegetation in the two monitoring periods of 1390 (before the boxwood moth pest) and 1401 (after the boxwood moth pest) in the Buxus hyrcanus Pojark reserve in Sisangan.
Material and Methods: The study of above-ground vegetation was carried out with the Braun-Blanquet method at peak vegetation cover by the systematic-selective method in 200 and 400-meter grid dimensions by considering the indicator stand concept in 2010 (before the moth pest) and 2022 (after the moth pest).
Results: The results showed that the number of 52 species in 2010 and the number of 69 species in 1401 were identified in the Sisangan box tree (Buxus hyrcanus Pojark) forest reserve. The results showed that in 2010, Phanerophytes with 44% (23 species) and Cryptophytes with 19% (10 species) were the most present, respectively. But in 2022, Phanerophytes with 38% (26 species) and Trophytes with 23% (16 species) were the most important biological spectrum, respectively. The results of examining species diversity, evenness, and species richness indices in two monitoring periods in 2010 and 2022 showed that there is a significant difference (P<0.001) between the values of species diversity, evenness, and species richness indices in two monitoring periods.
Conclusion: The results of this research showed that the richness and diversity of species increase with the intensity of defoliation by the boxwood pest and the opening of the canopy. The results of this research state that because the aboveground in the polluted areas is often covered with pioneer and herbaceous species, therefore, any management strategies should be prioritized so that the succession path in this reservoir should move towards the peak and climax stages.
Introduction and Objectives: Hyrcanus boxwood is the only type of boxwood in the Hyrcanus forests of Iran and one of the few evergreen broadleaf trees in the Hyrcanus forests. The present study intends to investigate the effect of the boxwood moth pest on the above-below-ground vegetation in the two monitoring periods of 1390 (before the boxwood moth pest) and 1401 (after the boxwood moth pest) in the Buxus hyrcanus Pojark reserve in Sisangan.
Material and Methods: The study of above-ground vegetation was carried out with the Braun-Blanquet method at peak vegetation cover by the systematic-selective method in 200 and 400-meter grid dimensions by considering the indicator stand concept in 2010 (before the moth pest) and 2022 (after the moth pest).
Results: The results showed that the number of 52 species in 2010 and the number of 69 species in 1401 were identified in the Sisangan box tree (Buxus hyrcanus Pojark) forest reserve. The results showed that in 2010, Phanerophytes with 44% (23 species) and Cryptophytes with 19% (10 species) were the most present, respectively. But in 2022, Phanerophytes with 38% (26 species) and Trophytes with 23% (16 species) were the most important biological spectrum, respectively. The results of examining species diversity, evenness, and species richness indices in two monitoring periods in 2010 and 2022 showed that there is a significant difference (P<0.001) between the values of species diversity, evenness, and species richness indices in two monitoring periods.
Conclusion: The results of this research showed that the richness and diversity of species increase with the intensity of defoliation by the boxwood pest and the opening of the canopy. The results of this research state that because the aboveground in the polluted areas is often covered with pioneer and herbaceous species, therefore, any management strategies should be prioritized so that the succession path in this reservoir should move towards the peak and climax stages.
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