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Multiproxy evidence for leaf-browsing and closed habitats in extinct proboscideans (Mammalia, Proboscidea) from Central Chile
Proboscideans are so-called ecosystem engineers and are considered key players in hypotheses about Late Pleistocene megafaunal extinctions. However, knowledge about the autoecology and chronology of the proboscideans in South America is still open to debate and raises controversial views. Here, we u...
Autores principales: | , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
National Academy of Sciences
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6140480/ https://www.ncbi.nlm.nih.gov/pubmed/30150377 http://dx.doi.org/10.1073/pnas.1804642115 |
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author | González-Guarda, Erwin Petermann-Pichincura, Alia Tornero, Carlos Domingo, Laura Agustí, Jordi Pino, Mario Abarzúa, Ana M. Capriles, José M. Villavicencio, Natalia A. Labarca, Rafael Tolorza, Violeta Sevilla, Paloma Rivals, Florent |
author_facet | González-Guarda, Erwin Petermann-Pichincura, Alia Tornero, Carlos Domingo, Laura Agustí, Jordi Pino, Mario Abarzúa, Ana M. Capriles, José M. Villavicencio, Natalia A. Labarca, Rafael Tolorza, Violeta Sevilla, Paloma Rivals, Florent |
author_sort | González-Guarda, Erwin |
collection | PubMed |
description | Proboscideans are so-called ecosystem engineers and are considered key players in hypotheses about Late Pleistocene megafaunal extinctions. However, knowledge about the autoecology and chronology of the proboscideans in South America is still open to debate and raises controversial views. Here, we used a range of multiproxy approaches and new radiocarbon datings to study the autoecology of Chilean gomphotheres, the only group of proboscideans to reach South America during the Great American Biotic Interchange (∼3.1 to 2.7 million years before present). As part of this study, we analyzed stable isotopes, dental microwear, and dental calculus microfossils on gomphothere molars from 30 Late Pleistocene sites (31° to 42°S). These proxies provided different scales of temporal resolution, which were then combined to assess the dietary and habitat patterns of these proboscideans. The multiproxy study suggests that most foraging took place in relatively closed environments. In Central Chile, there is a positive correlation between lower δ(13)C values and an increasing consumption of arboreal/scrub elements. Analyses of dental microwear and calculus microfossils have verified these leaf-browsing feeding habits. From a comparative perspective, the dietary pattern of South American gomphotheres appears to be constrained more by resource availability than by the potential dietary range of the individual taxa. This multiproxy study is aimed at increasing knowledge of the life history of gomphotheres and thus follows an issue considered one of the greatest challenges for paleontology in South America, recently pointed out by the need to thoroughly understand the role of ecological engineers before making predictions about the consequences of ecosystem defaunation. |
format | Online Article Text |
id | pubmed-6140480 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | National Academy of Sciences |
record_format | MEDLINE/PubMed |
spelling | pubmed-61404802018-09-18 Multiproxy evidence for leaf-browsing and closed habitats in extinct proboscideans (Mammalia, Proboscidea) from Central Chile González-Guarda, Erwin Petermann-Pichincura, Alia Tornero, Carlos Domingo, Laura Agustí, Jordi Pino, Mario Abarzúa, Ana M. Capriles, José M. Villavicencio, Natalia A. Labarca, Rafael Tolorza, Violeta Sevilla, Paloma Rivals, Florent Proc Natl Acad Sci U S A Biological Sciences Proboscideans are so-called ecosystem engineers and are considered key players in hypotheses about Late Pleistocene megafaunal extinctions. However, knowledge about the autoecology and chronology of the proboscideans in South America is still open to debate and raises controversial views. Here, we used a range of multiproxy approaches and new radiocarbon datings to study the autoecology of Chilean gomphotheres, the only group of proboscideans to reach South America during the Great American Biotic Interchange (∼3.1 to 2.7 million years before present). As part of this study, we analyzed stable isotopes, dental microwear, and dental calculus microfossils on gomphothere molars from 30 Late Pleistocene sites (31° to 42°S). These proxies provided different scales of temporal resolution, which were then combined to assess the dietary and habitat patterns of these proboscideans. The multiproxy study suggests that most foraging took place in relatively closed environments. In Central Chile, there is a positive correlation between lower δ(13)C values and an increasing consumption of arboreal/scrub elements. Analyses of dental microwear and calculus microfossils have verified these leaf-browsing feeding habits. From a comparative perspective, the dietary pattern of South American gomphotheres appears to be constrained more by resource availability than by the potential dietary range of the individual taxa. This multiproxy study is aimed at increasing knowledge of the life history of gomphotheres and thus follows an issue considered one of the greatest challenges for paleontology in South America, recently pointed out by the need to thoroughly understand the role of ecological engineers before making predictions about the consequences of ecosystem defaunation. National Academy of Sciences 2018-09-11 2018-08-27 /pmc/articles/PMC6140480/ /pubmed/30150377 http://dx.doi.org/10.1073/pnas.1804642115 Text en Copyright © 2018 the Author(s). Published by PNAS. https://creativecommons.org/licenses/by-nc-nd/4.0/ This open access article is distributed under Creative Commons Attribution-NonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND) (https://creativecommons.org/licenses/by-nc-nd/4.0/) . |
spellingShingle | Biological Sciences González-Guarda, Erwin Petermann-Pichincura, Alia Tornero, Carlos Domingo, Laura Agustí, Jordi Pino, Mario Abarzúa, Ana M. Capriles, José M. Villavicencio, Natalia A. Labarca, Rafael Tolorza, Violeta Sevilla, Paloma Rivals, Florent Multiproxy evidence for leaf-browsing and closed habitats in extinct proboscideans (Mammalia, Proboscidea) from Central Chile |
title | Multiproxy evidence for leaf-browsing and closed habitats in extinct proboscideans (Mammalia, Proboscidea) from Central Chile |
title_full | Multiproxy evidence for leaf-browsing and closed habitats in extinct proboscideans (Mammalia, Proboscidea) from Central Chile |
title_fullStr | Multiproxy evidence for leaf-browsing and closed habitats in extinct proboscideans (Mammalia, Proboscidea) from Central Chile |
title_full_unstemmed | Multiproxy evidence for leaf-browsing and closed habitats in extinct proboscideans (Mammalia, Proboscidea) from Central Chile |
title_short | Multiproxy evidence for leaf-browsing and closed habitats in extinct proboscideans (Mammalia, Proboscidea) from Central Chile |
title_sort | multiproxy evidence for leaf-browsing and closed habitats in extinct proboscideans (mammalia, proboscidea) from central chile |
topic | Biological Sciences |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6140480/ https://www.ncbi.nlm.nih.gov/pubmed/30150377 http://dx.doi.org/10.1073/pnas.1804642115 |
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