A multidisciplinary approach to characterise the Early-Middle Holocene palaeoenvironmental evolution of the Sado Valley of Portugal: implications for late Mesolithic human communities

In this paper we present the results of a multidisciplinary study performed in the Carrasqueira valley, a tributary of the River Sado (SW Portugal), aimed at characterising the Holocene environmental conditions during the late Mesolithic occupation of this valley. Our findings are based on a 13.5 m...

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Autores: Costa, Mestre Ana, Pombo de Freitas, Maria da Conceiçao, Jiménez-González, Marco A., Jiménez-Morillo, Nicasio T., Barroca Dias, Cristina, Val-Péon, Cristina, Reicherter, Klaus, Fatela, Francisco, Araújo, Ana Cristina, Gabriel, Sónia, Leira, Manel, Diniz, Mariana, Arias Cabal, Pablo|||0000-0003-0481-7563
Tipo de recurso: artículo
Fecha de publicación:2022
País:España
Institución:Universidad de Cantabria (UC)
Repositorio:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglés
OAI Identifier:oai:repositorio.unican.es:10902/25223
Acceso en línea:http://hdl.handle.net/10902/25223
Access Level:acceso abierto
Palabra clave:Geoarchaeology
Landscape
Palaeoestuary
Biomarkers
Palynology
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spelling A multidisciplinary approach to characterise the Early-Middle Holocene palaeoenvironmental evolution of the Sado Valley of Portugal: implications for late Mesolithic human communitiesCosta, Mestre AnaPombo de Freitas, Maria da ConceiçaoJiménez-González, Marco A.Jiménez-Morillo, Nicasio T.Barroca Dias, CristinaVal-Péon, CristinaReicherter, KlausFatela, FranciscoAraújo, Ana CristinaGabriel, SóniaLeira, ManelDiniz, MarianaArias Cabal, Pablo|||0000-0003-0481-7563GeoarchaeologyLandscapePalaeoestuaryBiomarkersPalynologyIn this paper we present the results of a multidisciplinary study performed in the Carrasqueira valley, a tributary of the River Sado (SW Portugal), aimed at characterising the Holocene environmental conditions during the late Mesolithic occupation of this valley. Our findings are based on a 13.5 m long sediment core (Arez3) collected on the alluvial plain close to a late Mesolithic shell midden, the Arapouco site. The results of the multiproxy analyses (texture, magnetic susceptibility, organic composition and chemistry, n-alkanes and palynology) point to a greater marine influence between ca. 8850 cal yrs. B.P. (at the core base) and ca. 7450 cal yrs. B.P. (at 750 cm below mean sea level (MSL)) and the existence of an environment similar to the present-day central estuarine basin. At this point in time, sedimentation rates were lower than the rate of sea-level rise, resulting in the formation of a drowned area with intertidal environments developing on the less incised margins. After 7040 cal yrs. B.P. the contribution of organic matter from terrestrial plants and freshwater phytoplankton to the sediment increased, reflecting a change in the sedimentary pattern, with the estuarine environments progressively giving way to freshwater environments. After the Middle Holocene (ca. 6530 cal yrs. B.P.), negative shifts of D15N to values ~0%o point to hyper-eutrophication and cyanobacteria bloom episodes under backswamp conditions. According to these results, the estuarine environment prevailed in the area until 7040 cal yrs. B.P. (5090 cal yrs. B.C.; 390 cm below MSL), i.e., during the Mesolithic occupation of the valley, allowing for the occurrence and for the exploitation of marine shellfish and fish by these hunter-gatherer communities at the proximity of the downstream occupation areas.This work was done with-in the PhD grant funded by FCT (SFRH/BD/110270/2015) attributed to Ana Maria Costa between 2016 and 2019 and took advantage of financial support from the projects SimTIC (HAR2017-82557-P) financed by the Spanish Ministry of Science and Innovation, Back to Sado (PTDC/HIS-ARQ/121592/2010) funded by FCT. The authors would also like to acknowledge the support of the Instituto Dom Luiz - IDL (UIDB/50019/2020).ElsevierUniversidad de Cantabria20222022-07-15journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articlehttp://hdl.handle.net/10902/25223Palaeogeography, Palaeoclimatology, Palaeoecology, 598, 2022, 111015reponame:UCrea Repositorio Abierto de la Universidad de Cantabriainstname:Universidad de Cantabria (UC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:repositorio.unican.es:10902/252232026-06-02T12:39:31Z
dc.title.none.fl_str_mv A multidisciplinary approach to characterise the Early-Middle Holocene palaeoenvironmental evolution of the Sado Valley of Portugal: implications for late Mesolithic human communities
title A multidisciplinary approach to characterise the Early-Middle Holocene palaeoenvironmental evolution of the Sado Valley of Portugal: implications for late Mesolithic human communities
spellingShingle A multidisciplinary approach to characterise the Early-Middle Holocene palaeoenvironmental evolution of the Sado Valley of Portugal: implications for late Mesolithic human communities
Costa, Mestre Ana
Geoarchaeology
Landscape
Palaeoestuary
Biomarkers
Palynology
title_short A multidisciplinary approach to characterise the Early-Middle Holocene palaeoenvironmental evolution of the Sado Valley of Portugal: implications for late Mesolithic human communities
title_full A multidisciplinary approach to characterise the Early-Middle Holocene palaeoenvironmental evolution of the Sado Valley of Portugal: implications for late Mesolithic human communities
title_fullStr A multidisciplinary approach to characterise the Early-Middle Holocene palaeoenvironmental evolution of the Sado Valley of Portugal: implications for late Mesolithic human communities
title_full_unstemmed A multidisciplinary approach to characterise the Early-Middle Holocene palaeoenvironmental evolution of the Sado Valley of Portugal: implications for late Mesolithic human communities
title_sort A multidisciplinary approach to characterise the Early-Middle Holocene palaeoenvironmental evolution of the Sado Valley of Portugal: implications for late Mesolithic human communities
dc.creator.none.fl_str_mv Costa, Mestre Ana
Pombo de Freitas, Maria da Conceiçao
Jiménez-González, Marco A.
Jiménez-Morillo, Nicasio T.
Barroca Dias, Cristina
Val-Péon, Cristina
Reicherter, Klaus
Fatela, Francisco
Araújo, Ana Cristina
Gabriel, Sónia
Leira, Manel
Diniz, Mariana
Arias Cabal, Pablo|||0000-0003-0481-7563
author Costa, Mestre Ana
author_facet Costa, Mestre Ana
Pombo de Freitas, Maria da Conceiçao
Jiménez-González, Marco A.
Jiménez-Morillo, Nicasio T.
Barroca Dias, Cristina
Val-Péon, Cristina
Reicherter, Klaus
Fatela, Francisco
Araújo, Ana Cristina
Gabriel, Sónia
Leira, Manel
Diniz, Mariana
Arias Cabal, Pablo|||0000-0003-0481-7563
author_role author
author2 Pombo de Freitas, Maria da Conceiçao
Jiménez-González, Marco A.
Jiménez-Morillo, Nicasio T.
Barroca Dias, Cristina
Val-Péon, Cristina
Reicherter, Klaus
Fatela, Francisco
Araújo, Ana Cristina
Gabriel, Sónia
Leira, Manel
Diniz, Mariana
Arias Cabal, Pablo|||0000-0003-0481-7563
author2_role author
author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad de Cantabria
dc.subject.none.fl_str_mv Geoarchaeology
Landscape
Palaeoestuary
Biomarkers
Palynology
topic Geoarchaeology
Landscape
Palaeoestuary
Biomarkers
Palynology
description In this paper we present the results of a multidisciplinary study performed in the Carrasqueira valley, a tributary of the River Sado (SW Portugal), aimed at characterising the Holocene environmental conditions during the late Mesolithic occupation of this valley. Our findings are based on a 13.5 m long sediment core (Arez3) collected on the alluvial plain close to a late Mesolithic shell midden, the Arapouco site. The results of the multiproxy analyses (texture, magnetic susceptibility, organic composition and chemistry, n-alkanes and palynology) point to a greater marine influence between ca. 8850 cal yrs. B.P. (at the core base) and ca. 7450 cal yrs. B.P. (at 750 cm below mean sea level (MSL)) and the existence of an environment similar to the present-day central estuarine basin. At this point in time, sedimentation rates were lower than the rate of sea-level rise, resulting in the formation of a drowned area with intertidal environments developing on the less incised margins. After 7040 cal yrs. B.P. the contribution of organic matter from terrestrial plants and freshwater phytoplankton to the sediment increased, reflecting a change in the sedimentary pattern, with the estuarine environments progressively giving way to freshwater environments. After the Middle Holocene (ca. 6530 cal yrs. B.P.), negative shifts of D15N to values ~0%o point to hyper-eutrophication and cyanobacteria bloom episodes under backswamp conditions. According to these results, the estuarine environment prevailed in the area until 7040 cal yrs. B.P. (5090 cal yrs. B.C.; 390 cm below MSL), i.e., during the Mesolithic occupation of the valley, allowing for the occurrence and for the exploitation of marine shellfish and fish by these hunter-gatherer communities at the proximity of the downstream occupation areas.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-07-15
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10902/25223
url http://hdl.handle.net/10902/25223
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv Palaeogeography, Palaeoclimatology, Palaeoecology, 598, 2022, 111015
reponame:UCrea Repositorio Abierto de la Universidad de Cantabria
instname:Universidad de Cantabria (UC)
instname_str Universidad de Cantabria (UC)
reponame_str UCrea Repositorio Abierto de la Universidad de Cantabria
collection UCrea Repositorio Abierto de la Universidad de Cantabria
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.301603

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