A millennium of trophic stability in Atlantic cod (Gadus morhua): transition to a lower and converging trophic niche in modern times

Abstract Stable isotope analyses of zooarchaeological material can be used to examine ecological variability in exploited species at centennial to millennial scales. Climate change is a notable driver of marine ecosystem change, although historical fishing is also likely to have impacted past marine...

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Autores principales:	Guðbjörg Ásta Ólafsdóttir, Ragnar Edvardsson, Sandra Timsic, Ramona Harrison, William P. Patterson
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/827c9a367ff34453928492d965a3e08a
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spelling	oai:doaj.org-article:827c9a367ff34453928492d965a3e08a2021-12-02T17:41:26ZA millennium of trophic stability in Atlantic cod (Gadus morhua): transition to a lower and converging trophic niche in modern times10.1038/s41598-021-92243-72045-2322https://doaj.org/article/827c9a367ff34453928492d965a3e08a2021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92243-7https://doaj.org/toc/2045-2322Abstract Stable isotope analyses of zooarchaeological material can be used to examine ecological variability in exploited species at centennial to millennial scales. Climate change is a notable driver of marine ecosystem change, although historical fishing is also likely to have impacted past marine systems. Fishing removes the oldest and largest individuals and may thereby result in shorter trophic pathways and reduced niche width of predatory fish species. In the current study we examine the trophic niche of Atlantic cod, haddock and Atlantic wolffish, in the last millennium using δ13C and δ15N values of bone collagen. We report a lower trophic level of Atlantic cod and haddock but higher level of wolffish in present times, following centuries at consistent and higher trophic levels of Atlantic cod. This results in a concurrent converging trophic niche of the demersal fish. We suggest that the current data set provides a valuable historical baseline facilitating interpretation of current variability in the trophic ecology of northern demersal fish.Guðbjörg Ásta ÓlafsdóttirRagnar EdvardssonSandra TimsicRamona HarrisonWilliam P. PattersonNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Guðbjörg Ásta Ólafsdóttir Ragnar Edvardsson Sandra Timsic Ramona Harrison William P. Patterson A millennium of trophic stability in Atlantic cod (Gadus morhua): transition to a lower and converging trophic niche in modern times
description	Abstract Stable isotope analyses of zooarchaeological material can be used to examine ecological variability in exploited species at centennial to millennial scales. Climate change is a notable driver of marine ecosystem change, although historical fishing is also likely to have impacted past marine systems. Fishing removes the oldest and largest individuals and may thereby result in shorter trophic pathways and reduced niche width of predatory fish species. In the current study we examine the trophic niche of Atlantic cod, haddock and Atlantic wolffish, in the last millennium using δ13C and δ15N values of bone collagen. We report a lower trophic level of Atlantic cod and haddock but higher level of wolffish in present times, following centuries at consistent and higher trophic levels of Atlantic cod. This results in a concurrent converging trophic niche of the demersal fish. We suggest that the current data set provides a valuable historical baseline facilitating interpretation of current variability in the trophic ecology of northern demersal fish.
format	article
author	Guðbjörg Ásta Ólafsdóttir Ragnar Edvardsson Sandra Timsic Ramona Harrison William P. Patterson
author_facet	Guðbjörg Ásta Ólafsdóttir Ragnar Edvardsson Sandra Timsic Ramona Harrison William P. Patterson
author_sort	Guðbjörg Ásta Ólafsdóttir
title	A millennium of trophic stability in Atlantic cod (Gadus morhua): transition to a lower and converging trophic niche in modern times
title_short	A millennium of trophic stability in Atlantic cod (Gadus morhua): transition to a lower and converging trophic niche in modern times
title_full	A millennium of trophic stability in Atlantic cod (Gadus morhua): transition to a lower and converging trophic niche in modern times
title_fullStr	A millennium of trophic stability in Atlantic cod (Gadus morhua): transition to a lower and converging trophic niche in modern times
title_full_unstemmed	A millennium of trophic stability in Atlantic cod (Gadus morhua): transition to a lower and converging trophic niche in modern times
title_sort	millennium of trophic stability in atlantic cod (gadus morhua): transition to a lower and converging trophic niche in modern times
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/827c9a367ff34453928492d965a3e08a
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A millennium of trophic stability in Atlantic cod (Gadus morhua): transition to a lower and converging trophic niche in modern times

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