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首页> 外文期刊>Palaeogeography, Palaeoclimatology, Palaeoecology: An International Journal for the Geo-Sciences >Climate variability and storm impacts as major drivers for human coastal marsh withdrawal over the Neolithic period (Southern Brittany, NW France)
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Climate variability and storm impacts as major drivers for human coastal marsh withdrawal over the Neolithic period (Southern Brittany, NW France)

机译：气候变化和风暴影响是新石器时代人类沿海沼泽撤离的主要驱动力（法国布列塔尼南部）

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摘要

Relationships between climate variations, vegetation dynamics, and early human activities during the Neolithic have been reconstructed from high-resolution pollen and foraminiferal records obtained from cores retrieved from coastal wetland located in southern Brittany (Guidel, NW France). Our data show that the area around Guidel corresponded to a dense temperate forest locally replaced by riparian forest in the marsh, without any human disturbance during the early Neolithic. During the mid-Neolithic, between 6500 and 5500 cal years BP, the first episode of probable human settlement is recorded, as suggested by the increase of anthropogenic plants. This early record of human impact is consistent with archeological studies that find a high concentration of funeral monuments around Guidel during this cultural period. This complex first phase is interrupted by the disappearance of anthropogenic influence coinciding with a cold/humid climate period in the region characterized by recurrent major storms. Then, at the transition between the middle to late Neolithic, at 5500 cal years BP, a second phase of human retreat is signaled by both vegetation dynamics and archeological records; this interval also coincides with a climatic deterioration marked by cold/humid conditions recorded in the region (Sorrel et al., 2012). The results of the present study imply that human settlement/departure over the Neolithic was probably influenced by climatic variations. During the Bronze Age, Iron Age, and Middle Ages, a progressive decline of the arboreal forest synchronous with an increase of anthropogenic plants, confirms the high and persistent human activity around the site. Furthermore, our results at Guidel suggest a different anthropogenic trend recorded between north and south Brittany. The human impact is well recorded during the Neolithic at Guidel, while in northern Brittany human settlement is not recorded before the Bronze Age, consistent with existing archeological data. (C) 2015 Elsevier B.V. All rights reserved.
机译：从高分辨率花粉和有孔虫记录重建了新石器时代气候变化，植被动态和人类早期活动之间的关系，这些花粉和有孔虫记录是从位于布列塔尼南部（法国西北地区）的沿海湿地取回的岩心获得的。我们的数据表明，Guidel周围的区域相当于茂密的温带森林，在沼泽地上被河岸森林局部取代，在新石器时代早期没有任何人为干扰。在新石器时代中期，BP在6500到5500 cal年之间​​，人类活动植物的增多表明，人类可能定居的第一个事件被记录下来。这种对人类影响的早期记录与考古学研究相一致，考古学研究发现，在这个文化时期，吉德尔附近有很多丧葬纪念碑。这一复杂的第一阶段被人为影响的消失所打断，而人为影响的消失恰逢该地区以经常性大风暴为特征的寒冷/潮湿的气候时期。然后，在新石器时代中期至晚期BP 5500 cal年之间​​的过渡期，植被动态和考古记录都预示着人类退缩的第二阶段。这个间隔也与该地区记录的寒冷/潮湿条件引起的气候恶化相吻合（Sorrel等，2012）。本研究的结果表明，新石器时代人类的定居/离开可能受到气候变化的影响。在青铜时代，铁器时代和中世纪期间，树木森林的逐渐衰退与人为植物的增加同步，证实了该地点周围人类的高强度和持续性活动。此外，我们在Guidel的研究结果表明，南北布列塔尼之间记录了不同的人为趋势。与现有的考古数据一致，在吉德雷尔的新石器时代，人类的影响得到了很好的记录，而在布列塔尼北部，在青铜时代之前没有记录到人类住区。 （C）2015 Elsevier B.V.保留所有权利。

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