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Artículo

Back to the future? Late Holocene marine food web structure in a warm climatic phase as a predictor of trophodynamics in a warmer South-Western Atlantic Ocean

Bas López, MariaIcon ; Briz Godino, IvanIcon ; Alvarez, Myrian RosaIcon ; Vales, Damián GustavoIcon ; Crespo, Enrique AlbertoIcon ; Cardona, Luis
Fecha de publicación: 02/2019
Editorial: Wiley Blackwell Publishing, Inc
Revista: Global Change Biology
ISSN: 1354-1013
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Biológicas

Resumen

Stable carbon and nitrogen isotope ratios in the skeletal elements of both ancient and modern marine species from the Beagle Channel were used to compare the structure of Late Holocene and modern food webs, and predict potential changes as a result of a Sea Surface Temperature (SST) increase in the region. Complementary, ancient and modern shells of limpets and mussels were isotopically analysed to explore changes in the isotopic baseline and compare marine food webs through time after an appropriate correction for baseline shifts. Results confirmed a declining pattern of marine primary productivity during the Late Holocene in the Beagle Channel. In general, the isotopic niches overlapped largely in the ancient food web in comparison to the current marine one, with the exception of that of cormorants (Phalacrocorax sp.). Our data suggest that all the species that have undergone intense human exploitation (Arctocephalus australis, Otaria flavescens and Merluccius sp.) significantly increased their trophic levels. The most important finding of this work was the very high isotopic overlap between snoek (Thyrsites atun) and hake (Merluccius sp.) during the Late Holocene. Increasing SST as a result of global warming could favour the recolonization of the southern South-Western Atlantic Ocean by snoek from the South-Eastern Pacific Ocean, with a potential impact on the landings of the economically important Argentine and Austral hake. These findings highlight the relevance of using zooarchaeological remains for providing predictions about marine food webs changes in the near future.
Palabras clave: ELEGINOPS MACLOVINUS , GLOBAL WARMING , HUNTER-FISHER-GATHERER SOCIETIES , MERLUCCIUS , SEA LION , SHELL MIDDENS , SPRATTUS FUEGENSIS , THYRSITES ATUN
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/88657
DOI: http://dx.doi.org/10.1111/gcb.14523
URL: https://onlinelibrary.wiley.com/doi/abs/10.1111/gcb.14523
Colecciones
Articulos(CADIC)
Articulos de CENTRO AUSTRAL DE INVESTIGACIONES CIENTIFICAS
Articulos(CESIMAR)
Articulos de CENTRO PARA EL ESTUDIO DE SISTEMAS MARINOS
Citación
Bas López, Maria; Briz Godino, Ivan; Alvarez, Myrian Rosa; Vales, Damián Gustavo; Crespo, Enrique Alberto; et al.; Back to the future? Late Holocene marine food web structure in a warm climatic phase as a predictor of trophodynamics in a warmer South-Western Atlantic Ocean; Wiley Blackwell Publishing, Inc; Global Change Biology; 25; 2; 2-2019; 404-419
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