Hydroclimatic variability drove human-megafauna-environment interactions during the late Pleistocene/Early Holocene in central Chile

IF 4 1区地球科学 Q1 GEOGRAPHY, PHYSICAL

Global and Planetary Change Pub Date : 2025-05-10 DOI:10.1016/j.gloplacha.2025.104876

Matías Frugone-Álvarez , Rafael Labarca , Josu Aranbarri , Matías Briceño , Leonardo A. Villacís , Carolina Godoy-Aguirre , Antonio Delgado-Huertas , José Blanco , Claudio Latorre , Erwin González-Guarda , Natalia Villavicencio , Carlos Tornero , José Iriarte , Blas Valero-Garcés

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Abstract

Major environmental changes were occurring when the first modern humans arrived in South America during the Pleistocene-Holocene transition. How these changes shaped human-environmental interactions across this period remain unclear. We analyzed the stratigraphy, biogeochemistry, and paleoclimatic models from the Ancient Tagua Tagua Lake (ATTL) in central Chile, one of the few continuous records of human and megafauna interactions with their environment in South America, to reconstruct the ATTL’'s ecosystem dynamics over the past 20,000 years. Results reveal that the ATTL transitioned from a shallow, cool lake with storm-driven alluvial deposition to a warmer, deeper, and more productive lake about 12,500 years ago, aligning with early humans' arrival. The ATTL became wetter but experienced severe droughts between 11,000 and 8,500 years ago, linked to shifts in Southern Westerly Winds and ENSO-like patterns. Fluctuating conditions drove humans and fauna to seek refuge in the basin, emphasizing local paleohydrology’'s role in shaping early human-ecosystem interactions.

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智利中部晚更新世/全新世早期水文气候变化驱动了人类-巨型动物-环境的相互作用

在更新世到全新世的过渡时期，当第一批现代人到达南美洲时，主要的环境变化正在发生。这些变化在这一时期如何塑造了人类与环境的相互作用尚不清楚。我们分析了智利中部的古塔瓜湖（ATTL）的地层学、生物地球化学和古气候模型，以重建过去2万年的ATTL生态系统动态，该湖是南美洲为数不多的人类和巨型动物与其环境相互作用的连续记录之一。结果表明，大约12500年前，ATTL从一个由风暴驱动的冲积沉积的浅而凉爽的湖泊转变为一个更温暖、更深、更富有生产力的湖泊，与早期人类的到来一致。在11000年到8500年前，atl变得更加湿润，但经历了严重的干旱，这与南西风和类似厄尔尼诺现象的模式的变化有关。波动的环境驱使人类和动物在盆地中寻求庇护，强调了当地古水文在塑造早期人类生态系统相互作用中的作用。

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来源期刊

Global and Planetary Change 地学天文-地球科学综合

CiteScore

7.40

自引率

10.30%

发文量

226

审稿时长

63 days

期刊介绍： The objective of the journal Global and Planetary Change is to provide a multi-disciplinary overview of the processes taking place in the Earth System and involved in planetary change over time. The journal focuses on records of the past and current state of the earth system, and future scenarios , and their link to global environmental change. Regional or process-oriented studies are welcome if they discuss global implications. Topics include, but are not limited to, changes in the dynamics and composition of the atmosphere, oceans and cryosphere, as well as climate change, sea level variation, observations/modelling of Earth processes from deep to (near-)surface and their coupling, global ecology, biogeography and the resilience/thresholds in ecosystems. Key criteria for the consideration of manuscripts are (a) the relevance for the global scientific community and/or (b) the wider implications for global scale problems, preferably combined with (c) having a significance beyond a single discipline. A clear focus on key processes associated with planetary scale change is strongly encouraged. Manuscripts can be submitted as either research contributions or as a review article. Every effort should be made towards the presentation of research outcomes in an understandable way for a broad readership.