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

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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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Autores principales: IDACOR, Yanes, Yurena, Cattáneo, Roxana, Izeta, Andrés D., Gordillo, Sandra, Costa, Thiago
Formato: Artículo publishedVersion
Publicado: SAGE 2014
Materias:
Argentina
Holocene
Ongamira
paleoenvironment
stable isotopes
terrestrial gastropods
Acceso en línea:https://suquia.ffyh.unc.edu.ar/handle/suquia/18006
Aporte de:
Suquía - Instituto de Antropología de Córdoba (IDACOR, CONICET y UNC) de Universidad Nacional de Córdoba
id I10-R181-suquia-18006
record_format 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
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