Abstract Textural, geochemical and geochronological analyses on two gravity and two box cores recovered from the outer and inner sectors of the Ria de Muros allowed reconstructing and timing the anthropogenic imprint on the sedimentary record from this ria. The chronological framework for the last 8 kyr was built based on Pb-210 dating (Constant Rate of Supply model) and C-14 dating. Recent sedimentation rates were an order of magnitude higher than those of the oldest analyzed sediments, and the periods of upwelling enhancement were constrained. Assessing the human influence on sediment metal contents required the establishment of local background levels. Since the 16th century the enrichment factors of copper, zinc and lead increased (up to 2.7, 1.5 and 2.1, respectively, at or close to present), and a remarkable increase in the fine-grained particles’ content happened in the outer ria sector, due to deforestation. The anthropogenic signature identified in the sedimentary record is assigned to fishing, harbor activities, mining, salting, and, or canning activities, depending on the considered period, which caused a local demographic increase since the 16th century in the region. Such population growth caused a rise in the marine signature of the organic matter, which likely results from enhanced primary production due to eutrophication caused by increased soil erosion and human and livestock waste inputs. Furthermore, the metal enrichment trend during the 20th century, which was more significant in the inner than in the outer ria sector, follows the different demographic evolution of the villages (related to urban and industrial development). The present study highlights the need for conjunction of varying dating techniques when reconstructing the anthropization trends in coastal environments.

中文翻译：

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Ría de Muros（伊比利亚半岛西北部）海洋沉积物中人为印记和渔业丰富度的评估和时间安排

摘要 对从 Ria de Muros 的外部和内部部分回收的两个重力和两个箱形岩心进行的构造、地球化学和地质年代学分析允许重建和确定该河口沉积记录上的人为印记。最后 8 kyr 的年代框架是基于 Pb-210 测年（恒定供应率模型）和 C-14 测年建立的。最近的沉积速率比最古老的分析沉积物高一个数量级，并且上涌增强的时期受到限制。评估人类对沉积物金属含量的影响需要建立当地的背景水平。自 16 世纪以来，铜、锌和铅的富集因子增加（分别达到或接近现在的 2.7、1.5 和 2.1），由于森林砍伐，外里亚地区的细粒颗粒含量显着增加。沉积记录中确定的人为特征被分配给捕鱼、港口活动、采矿、盐腌和/或罐头活动，具体取决于所考虑的时期，这导致该地区自 16 世纪以来当地人口增加。这种人口增长导致有机物质的海洋特征增加，这可能是由于土壤侵蚀加剧以及人类和牲畜废物输入导致富营养化导致初级生产增加所致。此外，20 世纪金属富集趋势在内部比在外部更显着，跟随村庄的不同人口演变（与城市和工业发展有关）。本研究强调在重建沿海环境中的人类化趋势时需要结合不同的测年技术。