Iran's Hyrcanian forests cover a relatively narrow strip in the north part of Iran, which are among the most important and valuable ecosystems registered in UNESCO's World Heritage List. Although there are worries about the impact of climate change, the influences of this issue on tree species in the Hyrcanian forest less studied. The effect of climate change on species distribution usually results in species shifting to higher altitudes and latitudes. In this study, the effect of climate change on the elevation shift of oriental beech as one of the most abundant and important tree species of the Hyrcanian forests was investigated, using an ensemble species distribution model for the current year, 2050, and 2070 under different climatic scenarios. Totally, 1092 occurrences of the beech were recorded for constructing the models. Results showed the mean elevation of the beech at the current climate conditions was 1110 m, which will be shifted to higher altitudes. The mean elevation distribution under RCP2.6, 4.5, 6.0, and 8.5 were 1210 m, 1279.2 m, 1280 m, and 1340 m for the year 2050; for the year 2070, they were 1190 m, 1370 m, 1340 m, and 1460.2 m. As a result, the species will shift to higher altitudes under the future climate change. The predicted potential distributions suggested that the most suitable areas for oriental beech at the current climate conditions are in the center (Mazandaran province) and west (Guilan province). Because of climate change, high potential habitats for the beech will shift from east to west that can provide a vision into the availability of suitable areas for the species regeneration and reforestation programs.

伊朗的希尔卡尼亚森林覆盖了伊朗北部相对狭窄的地带，是联合国教科文组织世界遗产名录中最重要和最有价值的生态系统之一。尽管人们担心气候变化的影响，但这一问题对希尔卡尼亚森林树种的影响研究较少。气候变化对物种分布的影响通常会导致物种转移到更高的海拔和纬度。本研究使用不同气候条件下当年、2050 年和 2070 年的集合物种分布模型，研究了气候变化对作为希尔卡尼亚森林中最丰富和最重要的树种之一的东方山毛榉海拔变化的影响。气候情景。总共记录了 1092 次山毛榉的出现以构建模型。结果表明，当前气候条件下山毛榉的平均海拔为 1110 m，将向更高的海拔移动。2050年RCP2.6、4.5、6.0和8.5下的平均海拔分布分别为1210 m、1279.2 m、1280 m和1340 m；对于 2070 年，它们分别为 1190 m、1370 m、1340 m 和 1460.2 m。因此，在未来的气候变化下，该物种将转移到更高的海拔。预测的潜力分布表明，在当前气候条件下，最适合东方山毛榉生长的地区是中部（马赞达兰省）和西部（桂兰省）。由于气候变化，山毛榉的高潜力栖息地将从东向西转移，这可以为物种再生和重新造林计划提供合适区域的可用性的愿景。