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

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Title: Hydroclimatic variability drove human-megafauna-environment interactions during the late Pleistocene/Early Holocene in central Chile.
Authors: Frugone-Álvarez, Matías1,2 (AUTHOR) matutefrugone@gmail.com, Labarca, Rafael3 (AUTHOR), Aranbarri, Josu4 (AUTHOR), Briceño, Matías5 (AUTHOR), Villacís, Leonardo A.6,7 (AUTHOR), Godoy-Aguirre, Carolina3 (AUTHOR), Delgado-Huertas, Antonio8 (AUTHOR), Blanco, José9 (AUTHOR), Latorre, Claudio10,11 (AUTHOR), González-Guarda, Erwin12 (AUTHOR), Villavicencio, Natalia12 (AUTHOR), Tornero, Carlos13,14 (AUTHOR), Iriarte, José15 (AUTHOR), Valero-Garcés, Blas16 (AUTHOR)
Source: Global & Planetary Change. Sep2025, Vol. 252, pN.PAG-N.PAG. 1p.
Subjects: Westerlies, Ecosystem dynamics, Ecological disturbances, Holocene Epoch, Social interaction
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 remains unclear. We analyzed the stratigraphy, biogeochemistry, and paleoclimatic models of 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. The 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 the arrival of early humans. 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. • A 20 ka Tagua Tagua Lake record unveils earliest climate–human feedbacks in central Chile. • Multiproxy proxies reveal ecological and cultural refugia at the Pleistocene–Holocene transition. • Orbital forcing, ENSO-like, SWW and PSJ events shaped late Pleistocene hydroclimate. • Multiproxy evidence documents human–megafauna co-occurrence during abrupt hydroclimatic changes. • Early Holocene (12.5–8.6 ka BP) featured enhanced moisture and ENSO-driven pulses. [ABSTRACT FROM AUTHOR]
Copyright of Global & Planetary Change is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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PubType: Academic Journal
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  Data: Hydroclimatic variability drove human-megafauna-environment interactions during the late Pleistocene/Early Holocene in central Chile.
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  Data: <searchLink fieldCode="AR" term="%22Frugone-Álvarez%2C+Matías%22">Frugone-Álvarez, Matías</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> matutefrugone@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Labarca%2C+Rafael%22">Labarca, Rafael</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Aranbarri%2C+Josu%22">Aranbarri, Josu</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Briceño%2C+Matías%22">Briceño, Matías</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Villacís%2C+Leonardo+A%2E%22">Villacís, Leonardo A.</searchLink><relatesTo>6,7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Godoy-Aguirre%2C+Carolina%22">Godoy-Aguirre, Carolina</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Delgado-Huertas%2C+Antonio%22">Delgado-Huertas, Antonio</searchLink><relatesTo>8</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Blanco%2C+José%22">Blanco, José</searchLink><relatesTo>9</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Latorre%2C+Claudio%22">Latorre, Claudio</searchLink><relatesTo>10,11</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22González-Guarda%2C+Erwin%22">González-Guarda, Erwin</searchLink><relatesTo>12</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Villavicencio%2C+Natalia%22">Villavicencio, Natalia</searchLink><relatesTo>12</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tornero%2C+Carlos%22">Tornero, Carlos</searchLink><relatesTo>13,14</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Iriarte%2C+José%22">Iriarte, José</searchLink><relatesTo>15</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Valero-Garcés%2C+Blas%22">Valero-Garcés, Blas</searchLink><relatesTo>16</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Global+%26+Planetary+Change%22">Global & Planetary Change</searchLink>. Sep2025, Vol. 252, pN.PAG-N.PAG. 1p.
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– Name: Abstract
  Label: Abstract
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  Data: 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 remains unclear. We analyzed the stratigraphy, biogeochemistry, and paleoclimatic models of 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. The 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 the arrival of early humans. 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. • A 20 ka Tagua Tagua Lake record unveils earliest climate–human feedbacks in central Chile. • Multiproxy proxies reveal ecological and cultural refugia at the Pleistocene–Holocene transition. • Orbital forcing, ENSO-like, SWW and PSJ events shaped late Pleistocene hydroclimate. • Multiproxy evidence documents human–megafauna co-occurrence during abrupt hydroclimatic changes. • Early Holocene (12.5–8.6 ka BP) featured enhanced moisture and ENSO-driven pulses. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Global & Planetary Change is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.gloplacha.2025.104876
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        Text: English
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      – SubjectFull: Ecological disturbances
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      – SubjectFull: Holocene Epoch
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      – SubjectFull: Social interaction
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