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Viewpoints: Diet and dietary adaptations in early hominins: The hard food perspective

Identifieur interne : 002798 ( Main/Exploration ); précédent : 002797; suivant : 002799

Viewpoints: Diet and dietary adaptations in early hominins: The hard food perspective

Auteurs : David S. Strait [États-Unis] ; Paul Constantino ; Peter W. Lucas [Koweït] ; Brian G. Richmond [États-Unis] ; Mark A. Spencer ; Paul C. Dechow [États-Unis] ; Callum F. Ross [États-Unis] ; Ian R. Grosse ; Barth W. Wright ; Bernard A. Wood [États-Unis] ; Gerhard W. Weber [Autriche] ; Qian Wang ; Craig Byron ; Dennis E. Slice ; Janine Chalk ; Amanda L. Smith ; Leslie C. Smith [États-Unis] ; Sarah Wood ; Michael Berthaume ; Stefano Benazzi [Allemagne] ; Christine Dzialo ; Kelli Tamvada ; Justin A. Ledogar

Source :

RBID : ISTEX:589203603A0669DF6E6EC32C5C3D65A7D0224C4D

Descripteurs français

English descriptors

Abstract

Recent biomechanical analyses examining the feeding adaptations of early hominins have yielded results consistent with the hypothesis that hard foods exerted a selection pressure that influenced the evolution of australopith morphology. However, this hypothesis appears inconsistent with recent reconstructions of early hominin diet based on dental microwear and stable isotopes. Thus, it is likely that either the diets of some australopiths included a high proportion of foods these taxa were poorly adapted to consume (i.e., foods that they would not have processed efficiently), or that aspects of what we thought we knew about the functional morphology of teeth must be wrong. Evaluation of these possibilities requires a recognition that analyses based on microwear, isotopes, finite element modeling, and enamel chips and cracks each test different types of hypotheses and allow different types of inferences. Microwear and isotopic analyses are best suited to reconstructing broad dietary patterns, but are limited in their ability to falsify specific hypotheses about morphological adaptation. Conversely, finite element analysis is a tool for evaluating the mechanical basis of form‐function relationships, but says little about the frequency with which specific behaviors were performed or the particular types of food that were consumed. Enamel chip and crack analyses are means of both reconstructing diet and examining biomechanics. We suggest that current evidence is consistent with the hypothesis that certain derived australopith traits are adaptations for consuming hard foods, but that australopiths had generalized diets that could include high proportions of foods that were both compliant and tough. Am J Phys Anthropol 151:339–355, 2013.© 2013 Wiley Periodicals, Inc.

Url:
DOI: 10.1002/ajpa.22285


Affiliations:


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Le document en format XML

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<term>American journal</term>
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<term>Information table</term>
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<term>Isotopic evidence</term>
<term>Isotopic signal</term>
<term>Isotopic signals</term>
<term>Large radii</term>
<term>Lucas</term>
<term>Margin fractures</term>
<term>Material properties</term>
<term>Mechanical basis</term>
<term>Mechanical consequences</term>
<term>Mechanical properties</term>
<term>Microwear</term>
<term>Microwear analysis</term>
<term>Microwear features</term>
<term>Microwear signal</term>
<term>Microwear textures</term>
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<term>Molar</term>
<term>Molar teeth</term>
<term>Morphology</term>
<term>Natural selection</term>
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<term>Nite element analysis</term>
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<term>Occlusal morphology</term>
<term>Occlusal relief</term>
<term>Occlusal surface</term>
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<term>Paranthropus boisei</term>
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<term>Phylogeny</term>
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<term>Phys anthropol</term>
<term>Physical anthropology</term>
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<term>Premolar loading</term>
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<term>Primates</term>
<term>Primatol</term>
<term>Proc natl acad</term>
<term>Quartz dust</term>
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<term>Robust australopiths</term>
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<term>Soft fruit</term>
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<term>Stable carbon isotope analysis</term>
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<term>Such foods</term>
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<term>Teaford</term>
<term>Test hypotheses</term>
<term>Testing hypotheses</term>
<term>Thick enamel</term>
<term>Tooth crown</term>
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<term>Trait</term>
<term>Ungar</term>
<term>Vinyard</term>
<term>Vivo experiments</term>
<term>Wang</term>
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<term>Adaptation</term>
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<term>American journal</term>
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<term>Dietary adaptation</term>
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<term>Different types</term>
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<term>Early hominin diets</term>
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<term>Enamel chip analysis</term>
<term>Enamel chips</term>
<term>Enamel crack analysis</term>
<term>Enamel thickness</term>
<term>Evol</term>
<term>Evol strait</term>
<term>Evolutionary</term>
<term>Evolutionary adaptation</term>
<term>Extant primates</term>
<term>Fallback</term>
<term>Fallback foods</term>
<term>Finite element analysis</term>
<term>Food item</term>
<term>Food material properties</term>
<term>Fossil</term>
<term>Fossil hominins</term>
<term>Fracture</term>
<term>Functional morphology</term>
<term>Grant sponsor</term>
<term>Grine</term>
<term>Hard foods</term>
<term>Hard object</term>
<term>Hard object feeders</term>
<term>Hard objects</term>
<term>High forces</term>
<term>High proportion</term>
<term>High strains</term>
<term>Hominid</term>
<term>Hominin</term>
<term>Hominins</term>
<term>Homo</term>
<term>Human evolution</term>
<term>Human origins</term>
<term>Hylander</term>
<term>Hypothesis</term>
<term>Important behavior</term>
<term>Information table</term>
<term>Ingestive processing</term>
<term>Ingestively</term>
<term>Isotope</term>
<term>Isotopic</term>
<term>Isotopic evidence</term>
<term>Isotopic signal</term>
<term>Isotopic signals</term>
<term>Large radii</term>
<term>Lucas</term>
<term>Margin fractures</term>
<term>Material properties</term>
<term>Mechanical basis</term>
<term>Mechanical consequences</term>
<term>Mechanical properties</term>
<term>Microwear</term>
<term>Microwear analysis</term>
<term>Microwear features</term>
<term>Microwear signal</term>
<term>Microwear textures</term>
<term>Modeling</term>
<term>Molar</term>
<term>Molar teeth</term>
<term>Morphology</term>
<term>Natural selection</term>
<term>Nite</term>
<term>Nite element analysis</term>
<term>Occlusal</term>
<term>Occlusal morphology</term>
<term>Occlusal relief</term>
<term>Occlusal surface</term>
<term>Pairwise comparisons</term>
<term>Paranthropus</term>
<term>Paranthropus boisei</term>
<term>Philos trans</term>
<term>Phylogeny</term>
<term>Phys</term>
<term>Phys anthropol</term>
<term>Physical anthropology</term>
<term>Pillar</term>
<term>Preferred hypothesis</term>
<term>Premolar</term>
<term>Premolar loading</term>
<term>Primate</term>
<term>Primates</term>
<term>Primatol</term>
<term>Proc natl acad</term>
<term>Quartz dust</term>
<term>Robust</term>
<term>Robust australopiths</term>
<term>Robustus</term>
<term>Small radii</term>
<term>Soft fruit</term>
<term>Sponheimer</term>
<term>Stable carbon isotope analysis</term>
<term>Strain magnitudes</term>
<term>Strait</term>
<term>Such foods</term>
<term>Taxon</term>
<term>Teaford</term>
<term>Test hypotheses</term>
<term>Testing hypotheses</term>
<term>Thick enamel</term>
<term>Tooth crown</term>
<term>Tough foods</term>
<term>Trait</term>
<term>Ungar</term>
<term>Vinyard</term>
<term>Vivo experiments</term>
<term>Wang</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr">
<term>écologie</term>
<term>Fruit à baie</term>
<term>Détroit</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front>
<div type="abstract">Recent biomechanical analyses examining the feeding adaptations of early hominins have yielded results consistent with the hypothesis that hard foods exerted a selection pressure that influenced the evolution of australopith morphology. However, this hypothesis appears inconsistent with recent reconstructions of early hominin diet based on dental microwear and stable isotopes. Thus, it is likely that either the diets of some australopiths included a high proportion of foods these taxa were poorly adapted to consume (i.e., foods that they would not have processed efficiently), or that aspects of what we thought we knew about the functional morphology of teeth must be wrong. Evaluation of these possibilities requires a recognition that analyses based on microwear, isotopes, finite element modeling, and enamel chips and cracks each test different types of hypotheses and allow different types of inferences. Microwear and isotopic analyses are best suited to reconstructing broad dietary patterns, but are limited in their ability to falsify specific hypotheses about morphological adaptation. Conversely, finite element analysis is a tool for evaluating the mechanical basis of form‐function relationships, but says little about the frequency with which specific behaviors were performed or the particular types of food that were consumed. Enamel chip and crack analyses are means of both reconstructing diet and examining biomechanics. We suggest that current evidence is consistent with the hypothesis that certain derived australopith traits are adaptations for consuming hard foods, but that australopiths had generalized diets that could include high proportions of foods that were both compliant and tough. Am J Phys Anthropol 151:339–355, 2013.© 2013 Wiley Periodicals, Inc.</div>
</front>
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<li>Autriche</li>
<li>Koweït</li>
<li>États-Unis</li>
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<li>District de Columbia</li>
<li>District de Leipzig</li>
<li>Illinois</li>
<li>Saxe (Land)</li>
<li>Texas</li>
<li>Washington (État)</li>
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<li>Chicago</li>
<li>Dallas</li>
<li>Leipzig</li>
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<name sortKey="Chalk, Janine" sort="Chalk, Janine" uniqKey="Chalk J" first="Janine" last="Chalk">Janine Chalk</name>
<name sortKey="Constantino, Paul" sort="Constantino, Paul" uniqKey="Constantino P" first="Paul" last="Constantino">Paul Constantino</name>
<name sortKey="Dzialo, Christine" sort="Dzialo, Christine" uniqKey="Dzialo C" first="Christine" last="Dzialo">Christine Dzialo</name>
<name sortKey="Grosse, Ian R" sort="Grosse, Ian R" uniqKey="Grosse I" first="Ian R." last="Grosse">Ian R. Grosse</name>
<name sortKey="Ledogar, Justin A" sort="Ledogar, Justin A" uniqKey="Ledogar J" first="Justin A." last="Ledogar">Justin A. Ledogar</name>
<name sortKey="Slice, Dennis E" sort="Slice, Dennis E" uniqKey="Slice D" first="Dennis E." last="Slice">Dennis E. Slice</name>
<name sortKey="Smith, Amanda L" sort="Smith, Amanda L" uniqKey="Smith A" first="Amanda L." last="Smith">Amanda L. Smith</name>
<name sortKey="Spencer, Mark A" sort="Spencer, Mark A" uniqKey="Spencer M" first="Mark A." last="Spencer">Mark A. Spencer</name>
<name sortKey="Tamvada, Kelli" sort="Tamvada, Kelli" uniqKey="Tamvada K" first="Kelli" last="Tamvada">Kelli Tamvada</name>
<name sortKey="Wang, Qian" sort="Wang, Qian" uniqKey="Wang Q" first="Qian" last="Wang">Qian Wang</name>
<name sortKey="Wood, Sarah" sort="Wood, Sarah" uniqKey="Wood S" first="Sarah" last="Wood">Sarah Wood</name>
<name sortKey="Wright, Barth W" sort="Wright, Barth W" uniqKey="Wright B" first="Barth W." last="Wright">Barth W. Wright</name>
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<name sortKey="Strait, David S" sort="Strait, David S" uniqKey="Strait D" first="David S." last="Strait">David S. Strait</name>
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<name sortKey="Dechow, Paul C" sort="Dechow, Paul C" uniqKey="Dechow P" first="Paul C." last="Dechow">Paul C. Dechow</name>
<name sortKey="Richmond, Brian G" sort="Richmond, Brian G" uniqKey="Richmond B" first="Brian G." last="Richmond">Brian G. Richmond</name>
<name sortKey="Richmond, Brian G" sort="Richmond, Brian G" uniqKey="Richmond B" first="Brian G." last="Richmond">Brian G. Richmond</name>
<name sortKey="Ross, Callum F" sort="Ross, Callum F" uniqKey="Ross C" first="Callum F." last="Ross">Callum F. Ross</name>
<name sortKey="Smith, Leslie C" sort="Smith, Leslie C" uniqKey="Smith L" first="Leslie C." last="Smith">Leslie C. Smith</name>
<name sortKey="Wood, Bernard A" sort="Wood, Bernard A" uniqKey="Wood B" first="Bernard A." last="Wood">Bernard A. Wood</name>
<name sortKey="Wood, Bernard A" sort="Wood, Bernard A" uniqKey="Wood B" first="Bernard A." last="Wood">Bernard A. Wood</name>
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<country name="Koweït">
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<name sortKey="Lucas, Peter W" sort="Lucas, Peter W" uniqKey="Lucas P" first="Peter W." last="Lucas">Peter W. Lucas</name>
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<name sortKey="Weber, Gerhard W" sort="Weber, Gerhard W" uniqKey="Weber G" first="Gerhard W." last="Weber">Gerhard W. Weber</name>
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</country>
<country name="Allemagne">
<region name="Saxe (Land)">
<name sortKey="Benazzi, Stefano" sort="Benazzi, Stefano" uniqKey="Benazzi S" first="Stefano" last="Benazzi">Stefano Benazzi</name>
</region>
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</affiliations>
</record>

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