List of Articles جنگل‌های هیرکانی

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  1 - The effect of distance measurement methods on the classification of ecological groups in Hyrcanian forests
  Naghmeh Pakgohar Javad Eshaghi Rad Gholamhossein Gholami Ahmad Alijanpour David W. Roberts
  10.30495/jrnr.2022.65075.10229
  Nowadays, the application of clustering methods is widely increased, although choosing the right method due to the existence of different method and effective factors is difficult. The present study aimed to compare the results of widely used clustering algorithms and t More

  Nowadays, the application of clustering methods is widely increased, although choosing the right method due to the existence of different method and effective factors is difficult. The present study aimed to compare the results of widely used clustering algorithms and to determine the most effective methods according to the different evaluators and evaluate the effective distance measurement method for clustering algorithms. The data of Hyrcanian beech forests were examined in an area protected by the department of natural resources of Nowshahr. Random-systematic sampling method with regular grid of 100×200 m was used for determining the center of sample plots; 100-m2 (10×10 m) sample plots had been used to check the shrub species and 400-m2 (20×20 m) to check the herbaceous species. A total of 120 sample plots were measured. The abundance and coverage of tree, shrub and herbaceous species were estimated based on Braun-Blanquette scale. Three distance methods of measuring distance Bray Curtis, Hellinger and Manhattan were used and five clustering methods (Average method clustering methods, Ward method, flexible beta method with beta values ​​of -0.1, -0.25, -0.4) with six evaluation indicators (silhouette evaluation criterion, PARATNA criterion, Indval criterion, ISAMIC criterion, MRPP criterion and Phi correlation coefficient) were examined. Different clustering algorithms were arranged from best to worst for each dataset. The comparison analysis revealed that Ward’s and flexible-beta with beta value of -0.1 had the best performance. The present findings illustrated that Hellinger distance measurement method is better in homogeneous data than other distance measurement methods. Manuscript profile
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  2 - Elevational shift of Carpinus betulus L. under the future climate change in northern Iran
  Mahdieh Khalatbari Limaki Majid Es-hagh-Nimvari seyed jalil Alavi Asadollah Mataji farid Kazemnezhadad
  10.30495/jrnr.2023.69911.10264
  Although there are concerns about the impact of climate change on forests, the impact of future climate change on tree species in the Hyrcanian forests has been less studied. The effect of climate change on the distribution of species usually leads to the movement of sp More

  Although there are concerns about the impact of climate change on forests, the impact of future climate change on tree species in the Hyrcanian forests has been less studied. The effect of climate change on the distribution of species usually leads to the movement of species to higher altitudes and latitudes. Hornbeam is the most abundant tree species in the Hyrcanian forests, which is distributed in a large part of northern Iran. In this study, the effect of climate change on the change of hornbeam species height using species distribution models are currently being studied under different climate change scenarios for 2050 and 2070. In this study, various statistics including TSS, AUC, KAPPA, Sensitivity and Specificity were used to evaluate the performance of species distribution models. According to the model evaluation criteria, the random forest model had a higher efficiency than other models in the distribution of hornbeam in northern Iran. The future prediction of species distribution models showed that climate change will have a negative impact on the distribution of hornbeam, which will significantly reduce the areas with the potential for the presence of this species under RCP2.6 and RCP8.5 in 2050 and 2070. The results showed that the hornbeam species currently has the greatest potential for presence up to an altitude of 1000m, but also expands to an altitude of 2500m and with climate change will have the greatest potential for presence at an altitude of more than 1000m. Although very complex mechanisms justify the distribution of tree species in mountainous areas, climate is one of the most important of these mechanisms and the results of this study can be a criterion for future planning in Hyrcanian forests. Manuscript profile
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  3 - Reviewing Richness of Woody Species in Northern Forests of Iran and Temperate Broadleaf Forests of Central Europe
  Gholamhosein Moradi
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  4 - Study of the subfamilies Cryptinae and Ichneumoninae (Hymenoptera: Ichneumonidae) from Mazandaran province, with record of five species new to Iran
  Reza Vafaei shoushtari H. Hooshyar Elham Sanatgar sh. goldasteh A. Mohammadi-Khoramabadi R. Jussila
  The fauna the subfamilies Ichneumoninae and Cryptinae (Hymenoptera: Ichneumonidae) was studied in Mazandaran province, north of Iran during 2016. Sampling was done using 8 Malaise traps which were installed in three altitude layers. Totally, 126 and 64 specimens were co More

  The fauna the subfamilies Ichneumoninae and Cryptinae (Hymenoptera: Ichneumonidae) was studied in Mazandaran province, north of Iran during 2016. Sampling was done using 8 Malaise traps which were installed in three altitude layers. Totally, 126 and 64 specimens were collected from the subfamilies Cryptinae and Ichneumoninae, respectively representing 25 species into 20 genera. Of them four genera and five species are recorded for the first time from Iran as following: Acrolyta Förster, 1869, Ceratophygadeuon Viereck, 1924, Eudelus Förster, 1869 and Mevesia Holmgren, 1890, Ceratophygadeuon varicornis (Thomson, 1884), Chirotica maculipennis (Gravenhorst, 1829), Eudelus gumperdensis (Schmiedeknecht, 1893), Mevesia arguta (Wesmael, 1845) and Virgichneumon albilineatus (Gravenhorst, 1829). Also a checklist of subfamilies Ichneumoninae and Cryptinae in Iran is provided. With new data of current research, the number of identified species of the subfamily Cryptinae of Iran and of the Hyrcanian forests biome increased to 128 and 39 species and for Ichneumoninae increased to 191 and 115, respectively.   Manuscript profile