Stage or Sub-Stage: The Contribution of Small Mammals to the Characterization of Middle Pleistocene Local Climate Variation

IF 2.3 Q2 GEOSCIENCES, MULTIDISCIPLINARY Quaternary Pub Date : 2023-10-10 DOI:10.3390/quat6040054
Loïc Lebreton, Juan Manuel López-García
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Abstract

In western Europe, the Middle Pleistocene is marked by Acheulean settlement and their diversification after the MIS 12. The Arago cave recovery of numerous human settlements correlate to MIS 14, 13 and MIS 12 making it an important site for the understanding of the Lower Palaeolithic in Southwestern Europe. It is also an important site for the understanding of palaeoenvironments and palaeobiodiversity as it has yielded rich faunal associations. The faunal associations allow us to observe three climatic stages within this study: two cold ones and a mild one. Small vertebrates, with their abundance and their diversity, are particularly useful for observing these periods, which historically have been correlated to glacial or interglacial stages. If the first cold phase, dated 438 ± 31 ka, is correlated to the Marine Isotopic Stage 12 (MIS 12), the correlation of the following phases to isotopic stages can be discussed. They may correspond to climatic variations of the MIS 12. Indeed, the latest studies about palaeoclimatic reconstitution which allow us to define the evolution of the palaeo-temperature show that these differences are relatively small. Therefore, instead of a correlation to MIS 12, 13 and 14, the medium complex of the Arago cave could belong solely to MIS 12. The correlation of these environmental changes to other global data, notably the isotopic curve, is challenging because there are various local factors influencing faunal association. We propose here both hypotheses and discuss the various factors which influence the distribution and the representation of the small vertebrate species present on the site.
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阶段或次阶段:小型哺乳动物对中更新世局部气候变化特征的贡献
在西欧,中更新世以阿舍利聚落及其在MIS 12之后的多样化为标志。阿拉戈洞穴中发现的大量人类住区与MIS 14、13和MIS 12相关,使其成为了解欧洲西南部旧石器时代晚期的重要地点。它也是了解古环境和古生物多样性的重要地点,因为它产生了丰富的动物关联。动物群的关联使我们能够在这项研究中观察到三个气候阶段:两个寒冷阶段和一个温和阶段。小型脊椎动物的丰富性和多样性,对观察这些历史上与冰期或间冰期相关的时期特别有用。如果第一个冷阶段(438±31 ka)与海洋同位素阶段12 (MIS 12)相关,则可以讨论后续阶段与同位素阶段的相关性。它们可能对应于MIS 12的气候变化。事实上,最新的古气候重建研究使我们能够确定古温度的演变,表明这些差异相对较小。因此,阿拉戈洞穴的中等复合体可能只属于MIS 12,而不是与MIS 12, 13和14相关。这些环境变化与其他全球数据(特别是同位素曲线)的相关性具有挑战性,因为有各种局部因素影响着动物群的关联。在此,我们提出了两种假设,并讨论了影响该遗址小型脊椎动物物种分布和代表性的各种因素。
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来源期刊
Quaternary
Quaternary GEOSCIENCES, MULTIDISCIPLINARY-
CiteScore
3.30
自引率
4.30%
发文量
44
审稿时长
11 weeks
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