Body size predicts ontogenetic nitrogen stable-isotope (δ15N) variation, but has little relationship with trophic level in ectotherm vertebrate predators

Autores
Villamarín, Francisco; Jardine, Timothy D.; Bunn, Stuart E.; Malvásio, Adriana; Piña, Carlos Ignacio; Jacobi, Cristina Mariana; Araújo, Diogo Dutra; de Brito, Elizângela Silva; de Moraes Carvalho, Felipe; da Costa, Igor David; Verdade, Luciano Martins; Lara, Neliton; de Camargo, Plínio Barbosa; Miorando, Priscila Saikoski; Costa Gonçalves Portelinha, Thiago; Marques, Thiago Simon; Magnusson, William E.
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Large predators have disproportionate efects on their underlying food webs. Thus, appropriately assigning trophic positions has important conservation implications both for the predators themselves and for their prey. Large-bodied predators are often referred to as apex predators, implying that they are many trophic levels above primary producers. However, theoretical considerations predict both higher and lower trophic position with increasing body size. Nitrogen stable isotope values (δ15N) are increasingly replacing stomach contents or behavioral observations to assess trophic position and it is often assumed that ontogenetic dietary shifts result in higher trophic positions. Intraspecifc studies based on δ15N values found a positive relationship between size and inferred trophic position. Here, we use datasets of predatory vertebrate ectotherms (crocodilians, turtles, lizards and fshes) to show that, although there are positive intraspecifc relationships between size and δ15N values, relationships between stomach-content-based trophic level (TPdiet) and size are undetectable or negative. As there is usually no single value for 15N trophic discrimination factor (TDF) applicable to a predator species or its prey, estimates of trophic position based on δ15N in ectotherm vertebrates with large size ranges, may be inaccurate and biased. We urge a reconsideration of the sole use of δ15N values to assess trophic position and encourage the combined use of isotopes and stomach contents to assess diet and trophic level.
Fil: Villamarín, Francisco. Universidad Regional Amazónica Ikiam; Ecuador
Fil: Jardine, Timothy D.. University of Saskatchewan; Canadá
Fil: Bunn, Stuart E.. Griffith University; Australia
Fil: Malvásio, Adriana. Universidade Federal Do Tocantins (ufdt);
Fil: Piña, Carlos Ignacio. Provincia de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Universidad Autónoma de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción; Argentina
Fil: Jacobi, Cristina Mariana. Universidade de Sao Paulo; Brasil
Fil: Araújo, Diogo Dutra. Universidad de Vale do Rio dos Sinos; Brasil
Fil: de Brito, Elizângela Silva. Universidade Federal Do Mato Grosso (ufmt);
Fil: de Moraes Carvalho, Felipe. Virginia Polytechnic Institute; Estados Unidos
Fil: da Costa, Igor David. Universidade Federal Fluminense; Brasil
Fil: Verdade, Luciano Martins. Wildlife Management Consultancy; Brasil
Fil: Lara, Neliton. Universidade de Sao Paulo; Brasil
Fil: de Camargo, Plínio Barbosa. Universidade de Sao Paulo; Brasil
Fil: Miorando, Priscila Saikoski. Universidade Federal do Pará; Brasil
Fil: Costa Gonçalves Portelinha, Thiago. Universidade Federal de Tocantins; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Marques, Thiago Simon. Universidade de Sorocaba; Brasil
Fil: Magnusson, William E.. Instituto Nacional de Pesquisas da Amazônia; Brasil
Materia
ISOTOPIC ECOLOGY
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/238817
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Body size predicts ontogenetic nitrogen stable-isotope (δ15N) variation, but has little relationship with trophic level in ectotherm vertebrate predatorsVillamarín, FranciscoJardine, Timothy D.Bunn, Stuart E.Malvásio, AdrianaPiña, Carlos IgnacioJacobi, Cristina MarianaAraújo, Diogo Dutrade Brito, Elizângela Silvade Moraes Carvalho, Felipeda Costa, Igor DavidVerdade, Luciano MartinsLara, Nelitonde Camargo, Plínio BarbosaMiorando, Priscila SaikoskiCosta Gonçalves Portelinha, ThiagoMarques, Thiago SimonMagnusson, William E.ISOTOPIC ECOLOGYhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Large predators have disproportionate efects on their underlying food webs. Thus, appropriately assigning trophic positions has important conservation implications both for the predators themselves and for their prey. Large-bodied predators are often referred to as apex predators, implying that they are many trophic levels above primary producers. However, theoretical considerations predict both higher and lower trophic position with increasing body size. Nitrogen stable isotope values (δ15N) are increasingly replacing stomach contents or behavioral observations to assess trophic position and it is often assumed that ontogenetic dietary shifts result in higher trophic positions. Intraspecifc studies based on δ15N values found a positive relationship between size and inferred trophic position. Here, we use datasets of predatory vertebrate ectotherms (crocodilians, turtles, lizards and fshes) to show that, although there are positive intraspecifc relationships between size and δ15N values, relationships between stomach-content-based trophic level (TPdiet) and size are undetectable or negative. As there is usually no single value for 15N trophic discrimination factor (TDF) applicable to a predator species or its prey, estimates of trophic position based on δ15N in ectotherm vertebrates with large size ranges, may be inaccurate and biased. We urge a reconsideration of the sole use of δ15N values to assess trophic position and encourage the combined use of isotopes and stomach contents to assess diet and trophic level.Fil: Villamarín, Francisco. Universidad Regional Amazónica Ikiam; EcuadorFil: Jardine, Timothy D.. University of Saskatchewan; CanadáFil: Bunn, Stuart E.. Griffith University; AustraliaFil: Malvásio, Adriana. Universidade Federal Do Tocantins (ufdt);Fil: Piña, Carlos Ignacio. Provincia de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Universidad Autónoma de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción; ArgentinaFil: Jacobi, Cristina Mariana. Universidade de Sao Paulo; BrasilFil: Araújo, Diogo Dutra. Universidad de Vale do Rio dos Sinos; BrasilFil: de Brito, Elizângela Silva. Universidade Federal Do Mato Grosso (ufmt);Fil: de Moraes Carvalho, Felipe. Virginia Polytechnic Institute; Estados UnidosFil: da Costa, Igor David. Universidade Federal Fluminense; BrasilFil: Verdade, Luciano Martins. Wildlife Management Consultancy; BrasilFil: Lara, Neliton. Universidade de Sao Paulo; BrasilFil: de Camargo, Plínio Barbosa. Universidade de Sao Paulo; BrasilFil: Miorando, Priscila Saikoski. Universidade Federal do Pará; BrasilFil: Costa Gonçalves Portelinha, Thiago. Universidade Federal de Tocantins; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Marques, Thiago Simon. Universidade de Sorocaba; BrasilFil: Magnusson, William E.. Instituto Nacional de Pesquisas da Amazônia; BrasilNature2024-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/238817Villamarín, Francisco; Jardine, Timothy D.; Bunn, Stuart E.; Malvásio, Adriana; Piña, Carlos Ignacio; et al.; Body size predicts ontogenetic nitrogen stable-isotope (δ15N) variation, but has little relationship with trophic level in ectotherm vertebrate predators; Nature; Scientific Reports; 14; 1; 6-2024; 1-102045-2322CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.nature.com/articles/s41598-024-61969-5info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-024-61969-5info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:01:43Zoai:ri.conicet.gov.ar:11336/238817instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:01:43.933CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Body size predicts ontogenetic nitrogen stable-isotope (δ15N) variation, but has little relationship with trophic level in ectotherm vertebrate predators
title Body size predicts ontogenetic nitrogen stable-isotope (δ15N) variation, but has little relationship with trophic level in ectotherm vertebrate predators
spellingShingle Body size predicts ontogenetic nitrogen stable-isotope (δ15N) variation, but has little relationship with trophic level in ectotherm vertebrate predators
Villamarín, Francisco
ISOTOPIC ECOLOGY
title_short Body size predicts ontogenetic nitrogen stable-isotope (δ15N) variation, but has little relationship with trophic level in ectotherm vertebrate predators
title_full Body size predicts ontogenetic nitrogen stable-isotope (δ15N) variation, but has little relationship with trophic level in ectotherm vertebrate predators
title_fullStr Body size predicts ontogenetic nitrogen stable-isotope (δ15N) variation, but has little relationship with trophic level in ectotherm vertebrate predators
title_full_unstemmed Body size predicts ontogenetic nitrogen stable-isotope (δ15N) variation, but has little relationship with trophic level in ectotherm vertebrate predators
title_sort Body size predicts ontogenetic nitrogen stable-isotope (δ15N) variation, but has little relationship with trophic level in ectotherm vertebrate predators
dc.creator.none.fl_str_mv Villamarín, Francisco
Jardine, Timothy D.
Bunn, Stuart E.
Malvásio, Adriana
Piña, Carlos Ignacio
Jacobi, Cristina Mariana
Araújo, Diogo Dutra
de Brito, Elizângela Silva
de Moraes Carvalho, Felipe
da Costa, Igor David
Verdade, Luciano Martins
Lara, Neliton
de Camargo, Plínio Barbosa
Miorando, Priscila Saikoski
Costa Gonçalves Portelinha, Thiago
Marques, Thiago Simon
Magnusson, William E.
author Villamarín, Francisco
author_facet Villamarín, Francisco
Jardine, Timothy D.
Bunn, Stuart E.
Malvásio, Adriana
Piña, Carlos Ignacio
Jacobi, Cristina Mariana
Araújo, Diogo Dutra
de Brito, Elizângela Silva
de Moraes Carvalho, Felipe
da Costa, Igor David
Verdade, Luciano Martins
Lara, Neliton
de Camargo, Plínio Barbosa
Miorando, Priscila Saikoski
Costa Gonçalves Portelinha, Thiago
Marques, Thiago Simon
Magnusson, William E.
author_role author
author2 Jardine, Timothy D.
Bunn, Stuart E.
Malvásio, Adriana
Piña, Carlos Ignacio
Jacobi, Cristina Mariana
Araújo, Diogo Dutra
de Brito, Elizângela Silva
de Moraes Carvalho, Felipe
da Costa, Igor David
Verdade, Luciano Martins
Lara, Neliton
de Camargo, Plínio Barbosa
Miorando, Priscila Saikoski
Costa Gonçalves Portelinha, Thiago
Marques, Thiago Simon
Magnusson, William E.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv ISOTOPIC ECOLOGY
topic ISOTOPIC ECOLOGY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Large predators have disproportionate efects on their underlying food webs. Thus, appropriately assigning trophic positions has important conservation implications both for the predators themselves and for their prey. Large-bodied predators are often referred to as apex predators, implying that they are many trophic levels above primary producers. However, theoretical considerations predict both higher and lower trophic position with increasing body size. Nitrogen stable isotope values (δ15N) are increasingly replacing stomach contents or behavioral observations to assess trophic position and it is often assumed that ontogenetic dietary shifts result in higher trophic positions. Intraspecifc studies based on δ15N values found a positive relationship between size and inferred trophic position. Here, we use datasets of predatory vertebrate ectotherms (crocodilians, turtles, lizards and fshes) to show that, although there are positive intraspecifc relationships between size and δ15N values, relationships between stomach-content-based trophic level (TPdiet) and size are undetectable or negative. As there is usually no single value for 15N trophic discrimination factor (TDF) applicable to a predator species or its prey, estimates of trophic position based on δ15N in ectotherm vertebrates with large size ranges, may be inaccurate and biased. We urge a reconsideration of the sole use of δ15N values to assess trophic position and encourage the combined use of isotopes and stomach contents to assess diet and trophic level.
Fil: Villamarín, Francisco. Universidad Regional Amazónica Ikiam; Ecuador
Fil: Jardine, Timothy D.. University of Saskatchewan; Canadá
Fil: Bunn, Stuart E.. Griffith University; Australia
Fil: Malvásio, Adriana. Universidade Federal Do Tocantins (ufdt);
Fil: Piña, Carlos Ignacio. Provincia de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Universidad Autónoma de Entre Ríos. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción; Argentina
Fil: Jacobi, Cristina Mariana. Universidade de Sao Paulo; Brasil
Fil: Araújo, Diogo Dutra. Universidad de Vale do Rio dos Sinos; Brasil
Fil: de Brito, Elizângela Silva. Universidade Federal Do Mato Grosso (ufmt);
Fil: de Moraes Carvalho, Felipe. Virginia Polytechnic Institute; Estados Unidos
Fil: da Costa, Igor David. Universidade Federal Fluminense; Brasil
Fil: Verdade, Luciano Martins. Wildlife Management Consultancy; Brasil
Fil: Lara, Neliton. Universidade de Sao Paulo; Brasil
Fil: de Camargo, Plínio Barbosa. Universidade de Sao Paulo; Brasil
Fil: Miorando, Priscila Saikoski. Universidade Federal do Pará; Brasil
Fil: Costa Gonçalves Portelinha, Thiago. Universidade Federal de Tocantins; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Marques, Thiago Simon. Universidade de Sorocaba; Brasil
Fil: Magnusson, William E.. Instituto Nacional de Pesquisas da Amazônia; Brasil
description Large predators have disproportionate efects on their underlying food webs. Thus, appropriately assigning trophic positions has important conservation implications both for the predators themselves and for their prey. Large-bodied predators are often referred to as apex predators, implying that they are many trophic levels above primary producers. However, theoretical considerations predict both higher and lower trophic position with increasing body size. Nitrogen stable isotope values (δ15N) are increasingly replacing stomach contents or behavioral observations to assess trophic position and it is often assumed that ontogenetic dietary shifts result in higher trophic positions. Intraspecifc studies based on δ15N values found a positive relationship between size and inferred trophic position. Here, we use datasets of predatory vertebrate ectotherms (crocodilians, turtles, lizards and fshes) to show that, although there are positive intraspecifc relationships between size and δ15N values, relationships between stomach-content-based trophic level (TPdiet) and size are undetectable or negative. As there is usually no single value for 15N trophic discrimination factor (TDF) applicable to a predator species or its prey, estimates of trophic position based on δ15N in ectotherm vertebrates with large size ranges, may be inaccurate and biased. We urge a reconsideration of the sole use of δ15N values to assess trophic position and encourage the combined use of isotopes and stomach contents to assess diet and trophic level.
publishDate 2024
dc.date.none.fl_str_mv 2024-06
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/238817
Villamarín, Francisco; Jardine, Timothy D.; Bunn, Stuart E.; Malvásio, Adriana; Piña, Carlos Ignacio; et al.; Body size predicts ontogenetic nitrogen stable-isotope (δ15N) variation, but has little relationship with trophic level in ectotherm vertebrate predators; Nature; Scientific Reports; 14; 1; 6-2024; 1-10
2045-2322
CONICET Digital
CONICET
url http://hdl.handle.net/11336/238817
identifier_str_mv Villamarín, Francisco; Jardine, Timothy D.; Bunn, Stuart E.; Malvásio, Adriana; Piña, Carlos Ignacio; et al.; Body size predicts ontogenetic nitrogen stable-isotope (δ15N) variation, but has little relationship with trophic level in ectotherm vertebrate predators; Nature; Scientific Reports; 14; 1; 6-2024; 1-10
2045-2322
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.nature.com/articles/s41598-024-61969-5
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-024-61969-5
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Nature
publisher.none.fl_str_mv Nature
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.885934

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