Trophic indices for micronektonic fishes reveal their dependence on the microbial system in the North Atlantic

Abstract The importance of microbes for the functioning of oceanic food webs is well established, but their relevance for top consumers is still poorly appreciated. Large differences in individual size, and consequently in growth rates and the relevant spatial and temporal scales involved, make the...

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Autores principales:	Antonio Bode, M. Pilar Olivar, Santiago Hernández-León
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c5bb005103c14676b44e8c1d3bd58e82
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spelling	oai:doaj.org-article:c5bb005103c14676b44e8c1d3bd58e822021-12-02T16:45:21ZTrophic indices for micronektonic fishes reveal their dependence on the microbial system in the North Atlantic10.1038/s41598-021-87767-x2045-2322https://doaj.org/article/c5bb005103c14676b44e8c1d3bd58e822021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87767-xhttps://doaj.org/toc/2045-2322Abstract The importance of microbes for the functioning of oceanic food webs is well established, but their relevance for top consumers is still poorly appreciated. Large differences in individual size, and consequently in growth rates and the relevant spatial and temporal scales involved, make the integration of microorganisms and large metazoans in a common food web framework difficult. Using stable isotopes, this study estimated the trophic position of 13 species of micronektonic fishes to examine the microbial and metazoan contribution to mid trophic level consumers. Vertically migrant species displayed higher trophic positions than non-migrant species in all depth layers. The estimated trophic positions agreed well with those from the literature, but all species displayed mean increases between 0.5 and 0.8 trophic positions when taking into account microbial trophic steps. Trophic position, but not the relative importance of the microbial food web, increased with individual size, suggesting that current estimates of the trophic position of top consumers and of the length of oceanic food webs are too low because they are based only on metazoan trophic steps. This finding calls for a review of trophic position estimates and of the efficiency of trophic transfers along oceanic food webs.Antonio BodeM. Pilar OlivarSantiago Hernández-LeónNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Antonio Bode M. Pilar Olivar Santiago Hernández-León Trophic indices for micronektonic fishes reveal their dependence on the microbial system in the North Atlantic
description	Abstract The importance of microbes for the functioning of oceanic food webs is well established, but their relevance for top consumers is still poorly appreciated. Large differences in individual size, and consequently in growth rates and the relevant spatial and temporal scales involved, make the integration of microorganisms and large metazoans in a common food web framework difficult. Using stable isotopes, this study estimated the trophic position of 13 species of micronektonic fishes to examine the microbial and metazoan contribution to mid trophic level consumers. Vertically migrant species displayed higher trophic positions than non-migrant species in all depth layers. The estimated trophic positions agreed well with those from the literature, but all species displayed mean increases between 0.5 and 0.8 trophic positions when taking into account microbial trophic steps. Trophic position, but not the relative importance of the microbial food web, increased with individual size, suggesting that current estimates of the trophic position of top consumers and of the length of oceanic food webs are too low because they are based only on metazoan trophic steps. This finding calls for a review of trophic position estimates and of the efficiency of trophic transfers along oceanic food webs.
format	article
author	Antonio Bode M. Pilar Olivar Santiago Hernández-León
author_facet	Antonio Bode M. Pilar Olivar Santiago Hernández-León
author_sort	Antonio Bode
title	Trophic indices for micronektonic fishes reveal their dependence on the microbial system in the North Atlantic
title_short	Trophic indices for micronektonic fishes reveal their dependence on the microbial system in the North Atlantic
title_full	Trophic indices for micronektonic fishes reveal their dependence on the microbial system in the North Atlantic
title_fullStr	Trophic indices for micronektonic fishes reveal their dependence on the microbial system in the North Atlantic
title_full_unstemmed	Trophic indices for micronektonic fishes reveal their dependence on the microbial system in the North Atlantic
title_sort	trophic indices for micronektonic fishes reveal their dependence on the microbial system in the north atlantic
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c5bb005103c14676b44e8c1d3bd58e82
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Trophic indices for micronektonic fishes reveal their dependence on the microbial system in the North Atlantic

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