Vegetation dynamics around Lake Baikal since the middle Holocene reconstructed from the pollen and botanical composition analyses of peat sediments: Implications for paleoclimatic and archeological research
Vegetation dynamics around Lake Baikal since the middle Holocene reconstructed from the pollen and botanical composition analyses of peat sediments: Implications for paleoclimatic and archeological research
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DOI：
10.1016/j.quaint.2012.10.043
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发表时间：
2013-03
影响因子：
2.2
通讯作者：
E. Bezrukova;Stef;Hildebrandt;P. Letunova;E. V. Ivanov;Lyubov A. Orlova;S. Müller;P. Tarasov
中科院分区：
文献类型：
--
作者：
E. Bezrukova;Stef;Hildebrandt;P. Letunova;E. V. Ivanov;Lyubov A. Orlova;S. Müller;P. Tarasov
本文总结了贝加尔湖地区森林和森林草原地区自公元前1500年以来自然变化的现有证据。7 cal ka BP，时间跨度为新石器时代晚期至今。重建当地的小区域规模的植被变化及其可能的原因，在此期间，花粉含量和泥炭植物组成进行了分析，从三个放射性碳定年泥炭部分，位于贝加尔湖附近。为了更好地了解当地和区域的环境历史和气候变化，在全新世中期和晚期，结果与已发表的环境记录从湖泊和沼泽沉积物的LBR和其他地方进行了比较。的比较证实了早期的解释，中，晚全新世植被动态LBR主要是由自然强迫，可能与大规模的循环过程控制区域水平衡，而不是与人类活动。一些环境和考古数据的同步变化可能表明过去的气候变化和该地区的文化历史之间可能存在因果关系。库奇加（北纬53°00′57″，东经106°44′49″），奥奇科沃（北纬51°26′05″，东经104°38′57″）和切列穆什卡（北纬52°45′09″，东经108°05′50″）泥炭记录代表了贝加尔湖周围三个不同的气候区域，并表明较干燥的西海岸的环境和植被对全新世中晚期的气候振荡更为敏感，更潮湿的东部地区，特别是贝加尔湖以南。因此，可以预期，环境对早期人类社会的影响在贝加尔湖以西的干旱地区最为强烈。然而，为了验证这一假设，绝对有必要对这一迄今为止研究甚少的地区的全新世气候和环境进行准确的年代测定。
The present paper summarizes the current evidence of natural changes in the forest and forest-steppe areas of the Lake Baikal Region (LBR) since ca. 7 cal ka BP, covering the period from the late Neolithic to the present time. To reconstruct local to small-regional scale vegetation changes and their probable causes during this period, pollen content and peat botanical composition were analyzed from three radiocarbon-dated peat sections, located near Lake Baikal. For better understanding of the local and regional environmental history and climate variability during the middle and late Holocene, the results are compared with published environmental records from lacustrine and mire sediments from the LBR and from elsewhere. The comparison confirms the earlier interpretations that the middle and late Holocene vegetation dynamics in the LBR was primarily driven by natural forcing and likely was associated with large-scale circulation processes controlling the regional water balance rather than with human activities. Some synchronous changes in environmental and archeological data likely point to a possible causal link between past climate changes and the cultural history of the region. The Kuchelga (53°00′57″N, 106°44′49″E), Ochkovoe (51°26′05″N, 104°38′57″E) and Cheremushka (52°45′09″N, 108°05′50″E) peat records represent three different climatic regions around Lake Baikal and demonstrate that the environments and vegetation of the drier western coast were more sensitive to the climate oscillations of the middle and late Holocene in comparison to the more humid areas east, and particularly south of Baikal. Therefore, it could be expected that environmental impact on early human societies was strongest in the arid region to the west of Lake Baikal. To test this hypothesis, however, accurately dated multi-proxy records of the Holocene climate and environments from this so far poorly studied region are absolutely necessary.