The intertidal environment of the Ponzos beach (NW Iberian Peninsula) hosts a sedimentary sequence (including large wood fragments) deposited during the first half of the Holocene in a hygrophilous continental wetland. Pollen and macrofossil data alongside radiocarbon dating allow reconstruction of the changes that occurred during the Early and Middle Holocene in the landscape of the NW Iberia coastal lowlands, as well as the local wetland plant communities, in response to the climate variations and the eustatic sea-level oscillations. The sequence represents the evolution of a coastal wetland from its initial phases as a hygrophilous wetland towards the subsequent installation of a freshwater lagoon. Pollen data show the dominant role of Atlantic (mainly deciduous) woody taxa, the scarcity of conifers and the lack of Mediterranean elements in the coastal landscapes around the Ponzos site. The presence and abundance of some taxa such as deciduous Quercus, Castanea, Fagus, Tilia and Ulmus during the Early Holocene provides further support for the occurrence of glacial refuges in the Cantabrian-Atlantic area during the Last Glaciation. The diverse vegetation that characterizes the modern landscapes in this territory established later, spreading from these glacial reservoirs of biodiversity. In this sense, the notable and early presence of Fagus at the beginning of the Holocene, a tree also previously recorded during several phases of the Last Glacial Cycle on the NW Iberia coasts, is noteworthy. In addition, during the Early and Middle Holocene are recorded other trees that are currently extirpated as natural taxa in the area, such as Pinus, Tilia and Carpinus.

中文翻译：

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从庞佐斯湿地序列推断的伊比利亚西北部大西洋沿岸全新世环境变化

Ponzos 海滩（伊比利亚半岛西北部）的潮间带环境承载着全新世前半期在湿润的大陆湿地中沉积的沉积序列（包括大的木材碎片）。花粉和大型化石数据以及放射性碳测年允许重建在全新世早期和中期发生在西北伊比利亚沿海低地景观以及当地湿地植物群落中的变化，以应对气候变化和海平面水平振荡。该序列代表了沿海湿地从其最初阶段为湿润湿地到随后安装淡水泻湖的演变过程。花粉数据显示大西洋（主要是落叶）木本类群的主导作用，Ponzos 遗址周围的沿海景观中缺乏针叶树和地中海元素。某些分类群的存在和丰富，例如落叶栓皮栎，锥栗，水青冈，椴树和榆树早全新世时期提供了在坎塔布连大西洋地区冰川避难所的末次冰期期间发生进一步的支持。代表该领土现代景观特征的多样化植被是后来建立的，从这些生物多样性的冰川水库中蔓延开来。从这个意义上说，在全新世开始时显着和早期存在的山毛榉是值得注意的，这棵树也曾在伊比利亚西北部海岸的末次冰川周期的几个阶段中被记录下来。此外，在全新世早期和中期，记录了目前作为该地区自然分类群灭绝的其他树木，例如松，椴树和鹅。