Holocene (~4.5-1.7 cal. kyr BP) paleoenvironmental conditions in central Argentina inferred from entire-shell and intra-shell stable isotope composition of terrestrial gastropods
The isotopic fingerprint of terrestrial gastropods has been increasingly used as a credible natural paleoenvironmental archive. Most published work has used this proxy at tropical and temperate latitudes of the Northern Hemisphere, and focused on entire-shell analysis. The present study provides ent...
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Formato: | Artículo publishedVersion |
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SAGE
2014
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Acceso en línea: | https://suquia.ffyh.unc.edu.ar/handle/suquia/18006 |
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I10-R181-suquia-18006 |
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dspace |
institution |
Universidad Nacional de Córdoba |
institution_str |
I-10 |
repository_str |
R-181 |
collection |
Suquía - Instituto de Antropología de Córdoba (IDACOR, CONICET y UNC) |
topic |
Argentina Holocene Ongamira paleoenvironment stable isotopes terrestrial gastropods |
spellingShingle |
Argentina Holocene Ongamira paleoenvironment stable isotopes terrestrial gastropods IDACOR Yanes, Yurena Cattáneo, Roxana Izeta, Andrés D. Gordillo, Sandra Costa, Thiago Holocene (~4.5-1.7 cal. kyr BP) paleoenvironmental conditions in central Argentina inferred from entire-shell and intra-shell stable isotope composition of terrestrial gastropods |
topic_facet |
Argentina Holocene Ongamira paleoenvironment stable isotopes terrestrial gastropods |
description |
The isotopic fingerprint of terrestrial gastropods has been increasingly used as a credible natural paleoenvironmental archive. Most published work has used this proxy at tropical and temperate latitudes of the Northern Hemisphere, and focused on entire-shell analysis. The present study provides entire-shell and intra-shell isotopic profiles to infer average and seasonal late Holocene environmental conditions in central Argentina (30°S). Shells of Plagiodontes daedaleus (Gastropoda: Odontostomidae) were retrieved from the Alero Deodoro Roca–Sector B site, one of the few archaeological sites in central Argentina rich in shells collected by pre-Hispanic hunter-gatherer groups. Ancient entire shells exhibited values that were ~2.5‰ higher in δ13C and ~1.8‰ higher in δ18O than modern individuals, pointing to higher abundance of C4 plants and overall drier conditions (lower relative humidity and/or higher rain δ18O) during 4.5–1.7 cal. kyr BP than today, in agreement with published regional proxies. Intra-shell isotopic profiles suggest that modern and fossil specimens deposited their shells throughout two-to-three summer/winter cycles. Intra-shell δ18O values varied ~5‰, matching with the seasonal variation of rain δ18O values. The extent of seasonality was similar during 4.5–1.7 cal. kyr BP and today. Intra-shell δ13C values varied ~2–3‰ and did not portray distinct seasonal cycles, depicting minimal seasonal variations in the snail diet. This work illustrates that South American terrestrial gastropods have great potential for paleoenvironmental studies. |
format |
Artículo publishedVersion |
author |
IDACOR Yanes, Yurena Cattáneo, Roxana Izeta, Andrés D. Gordillo, Sandra Costa, Thiago |
author_facet |
IDACOR Yanes, Yurena Cattáneo, Roxana Izeta, Andrés D. Gordillo, Sandra Costa, Thiago |
author_sort |
IDACOR |
title |
Holocene (~4.5-1.7 cal. kyr BP) paleoenvironmental conditions in central Argentina inferred from entire-shell and intra-shell stable isotope composition of terrestrial gastropods |
title_short |
Holocene (~4.5-1.7 cal. kyr BP) paleoenvironmental conditions in central Argentina inferred from entire-shell and intra-shell stable isotope composition of terrestrial gastropods |
title_full |
Holocene (~4.5-1.7 cal. kyr BP) paleoenvironmental conditions in central Argentina inferred from entire-shell and intra-shell stable isotope composition of terrestrial gastropods |
title_fullStr |
Holocene (~4.5-1.7 cal. kyr BP) paleoenvironmental conditions in central Argentina inferred from entire-shell and intra-shell stable isotope composition of terrestrial gastropods |
title_full_unstemmed |
Holocene (~4.5-1.7 cal. kyr BP) paleoenvironmental conditions in central Argentina inferred from entire-shell and intra-shell stable isotope composition of terrestrial gastropods |
title_sort |
holocene (~4.5-1.7 cal. kyr bp) paleoenvironmental conditions in central argentina inferred from entire-shell and intra-shell stable isotope composition of terrestrial gastropods |
publisher |
SAGE |
publishDate |
2014 |
url |
https://suquia.ffyh.unc.edu.ar/handle/suquia/18006 |
work_keys_str_mv |
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bdutipo_str |
Repositorios |
_version_ |
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