Palynological reconstruction of 1500 years of vegetation history of Veisar (N Iran)
Palynological reconstruction of 1500 years of vegetation history of Veisar (N Iran)
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Veisar（伊朗北部）1500 年植被历史的孢粉学重建
DOI：
10.22092/botany.2014.101282
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发表时间：
2014
期刊：
影响因子：
56.9
通讯作者：
H. Joosten
中科院分区：
文献类型：
--
作者：
Masoumeh Khakpour Saeej;Elias Ramezani;Ali Aaghar Siyab Ghodsy;H. Zare;H. Joosten
对伊朗北部马赞达兰省Veisar沼泽的一个短沉积物岩芯进行花粉分析和AMS放射性碳测年，揭示了该地区晚全新世植被的历史。高花粉值表明，高加索桤木（Alnus subcordata）一直存在于附近的沼泽整个记录。枫杨（Pterocarya fraxinifolia）在900 BP前后出现了明显的衰退，之后逐渐消失。也存在于其他的孢粉学研究从中央Hyrcanian森林以及从西部格鲁吉亚，枫杨属的下降可能是由于区域气候变化，与中世纪气候异常同步。山毛榉（山毛榉），角木（鹅耳枥），橡树（栎属）和榆树（榆）花粉的高值意味着在过去的1500年中，物种丰富的森林周围的研究区域的斜坡上的存在。人为花粉粒的发生，如核桃和榛，表明长期的人类影响在该地区，而蒿属和藜科和苋科花粉的高值表明开放的植被或泥炭地附近。
Pollen analysis and AMS radiocarbon dating of a short sediment core from a mire in Veisar (Mazandaran province, N Iran) reveals the late-Holocene vegetation history of the area. High pollen values suggest that Caucasian alder (Alnus subcordata) has been present in the vicinity of the mire throughout the record. Wingnut (Pterocarya fraxinifolia), which was previously abundantly present, shows a dramatic decline around 900 BP and gradually disappears thereafter. Being also present in other palynological studies from the central Hyrcanian forests as well as from western Georgia, the Pterocarya decline might be attributed to a regional climate change, synchronous with the Mediaeval Climatic Anomaly. The high values of beech (Fagus), hornbeam (Carpinus), oak (Quercus) and elm (Ulmus) pollen imply the presence of species-rich forest on the slopes surrounding the study area over the past 1500 years. The occurrence of anthropogenic pollen grains, e.g. Juglans and Corylus, suggests long-term human impact in the region, whereas high values of Artemisia and chenopodiaceae AND Amaranthaceae pollen indicate open vegetation on or in the immediate vicinity of the peatland.