Global trophic position comparison of two dominant mesopelagic fish families (Myctophidae, Stomiidae) using amino acid nitrogen isotopic analyses.

The δ(15)N values of organisms are commonly used across diverse ecosystems to estimate trophic position and infer trophic connectivity. We undertook a novel cross-basin comparison of trophic position in two ecologically well-characterized and different groups of dominant mid-water fish consumers usi...

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Autores principales:	C Anela Choy, Peter C Davison, Jeffrey C Drazen, Adrian Flynn, Elizabeth J Gier, Joel C Hoffman, Jennifer P McClain-Counts, Todd W Miller, Brian N Popp, Steve W Ross, Tracey T Sutton
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d615fed158924ba5a952561c0bdc104f
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spelling	oai:doaj.org-article:d615fed158924ba5a952561c0bdc104f2021-11-18T08:07:16ZGlobal trophic position comparison of two dominant mesopelagic fish families (Myctophidae, Stomiidae) using amino acid nitrogen isotopic analyses.1932-620310.1371/journal.pone.0050133https://doaj.org/article/d615fed158924ba5a952561c0bdc104f2012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23209656/?tool=EBIhttps://doaj.org/toc/1932-6203The δ(15)N values of organisms are commonly used across diverse ecosystems to estimate trophic position and infer trophic connectivity. We undertook a novel cross-basin comparison of trophic position in two ecologically well-characterized and different groups of dominant mid-water fish consumers using amino acid nitrogen isotope compositions. We found that trophic positions estimated from the δ(15)N values of individual amino acids are nearly uniform within both families of these fishes across five global regions despite great variability in bulk tissue δ(15)N values. Regional differences in the δ(15)N values of phenylalanine confirmed that bulk tissue δ(15)N values reflect region-specific water mass biogeochemistry controlling δ(15)N values at the base of the food web. Trophic positions calculated from amino acid isotopic analyses (AA-TP) for lanternfishes (family Myctophidae) (AA-TP ∼2.9) largely align with expectations from stomach content studies (TP ∼3.2), while AA-TPs for dragonfishes (family Stomiidae) (AA-TP ∼3.2) were lower than TPs derived from stomach content studies (TP∼4.1). We demonstrate that amino acid nitrogen isotope analysis can overcome shortcomings of bulk tissue isotope analysis across biogeochemically distinct systems to provide globally comparative information regarding marine food web structure.C Anela ChoyPeter C DavisonJeffrey C DrazenAdrian FlynnElizabeth J GierJoel C HoffmanJennifer P McClain-CountsTodd W MillerBrian N PoppSteve W RossTracey T SuttonPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 11, p e50133 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q C Anela Choy Peter C Davison Jeffrey C Drazen Adrian Flynn Elizabeth J Gier Joel C Hoffman Jennifer P McClain-Counts Todd W Miller Brian N Popp Steve W Ross Tracey T Sutton Global trophic position comparison of two dominant mesopelagic fish families (Myctophidae, Stomiidae) using amino acid nitrogen isotopic analyses.
description	The δ(15)N values of organisms are commonly used across diverse ecosystems to estimate trophic position and infer trophic connectivity. We undertook a novel cross-basin comparison of trophic position in two ecologically well-characterized and different groups of dominant mid-water fish consumers using amino acid nitrogen isotope compositions. We found that trophic positions estimated from the δ(15)N values of individual amino acids are nearly uniform within both families of these fishes across five global regions despite great variability in bulk tissue δ(15)N values. Regional differences in the δ(15)N values of phenylalanine confirmed that bulk tissue δ(15)N values reflect region-specific water mass biogeochemistry controlling δ(15)N values at the base of the food web. Trophic positions calculated from amino acid isotopic analyses (AA-TP) for lanternfishes (family Myctophidae) (AA-TP ∼2.9) largely align with expectations from stomach content studies (TP ∼3.2), while AA-TPs for dragonfishes (family Stomiidae) (AA-TP ∼3.2) were lower than TPs derived from stomach content studies (TP∼4.1). We demonstrate that amino acid nitrogen isotope analysis can overcome shortcomings of bulk tissue isotope analysis across biogeochemically distinct systems to provide globally comparative information regarding marine food web structure.
format	article
author	C Anela Choy Peter C Davison Jeffrey C Drazen Adrian Flynn Elizabeth J Gier Joel C Hoffman Jennifer P McClain-Counts Todd W Miller Brian N Popp Steve W Ross Tracey T Sutton
author_facet	C Anela Choy Peter C Davison Jeffrey C Drazen Adrian Flynn Elizabeth J Gier Joel C Hoffman Jennifer P McClain-Counts Todd W Miller Brian N Popp Steve W Ross Tracey T Sutton
author_sort	C Anela Choy
title	Global trophic position comparison of two dominant mesopelagic fish families (Myctophidae, Stomiidae) using amino acid nitrogen isotopic analyses.
title_short	Global trophic position comparison of two dominant mesopelagic fish families (Myctophidae, Stomiidae) using amino acid nitrogen isotopic analyses.
title_full	Global trophic position comparison of two dominant mesopelagic fish families (Myctophidae, Stomiidae) using amino acid nitrogen isotopic analyses.
title_fullStr	Global trophic position comparison of two dominant mesopelagic fish families (Myctophidae, Stomiidae) using amino acid nitrogen isotopic analyses.
title_full_unstemmed	Global trophic position comparison of two dominant mesopelagic fish families (Myctophidae, Stomiidae) using amino acid nitrogen isotopic analyses.
title_sort	global trophic position comparison of two dominant mesopelagic fish families (myctophidae, stomiidae) using amino acid nitrogen isotopic analyses.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/d615fed158924ba5a952561c0bdc104f
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Global trophic position comparison of two dominant mesopelagic fish families (Myctophidae, Stomiidae) using amino acid nitrogen isotopic analyses.

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