Diet composition of the lizard Podarcis lilfordi (Lacertidae) on 2 small islands: an individual-resource network approach

Despite it is widely accepted that intrapopulation variation is fundamental to ecological and evolutionary processes, this level of information has only recently been included into network analysis of species/population interactions. When done, it has revealed non-random patterns in the distribution...

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Autores: Santamaría, Silvia, Enoksen, Camilla Aviaaja, Olesen, Jens M., Tavecchia, Giacomo, Rotger, Andreu, Igual, José Manuel, Traveset, Anna
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/309644
Acceso en línea:http://hdl.handle.net/10261/309644
Access Level:acceso abierto
Palabra clave:Balearic Islands
Individual diet composition
Individual-level network
Modularity
Nestedness
Population niche width
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spelling Diet composition of the lizard Podarcis lilfordi (Lacertidae) on 2 small islands: an individual-resource network approachSantamaría, SilviaEnoksen, Camilla AviaajaOlesen, Jens M.Tavecchia, GiacomoRotger, AndreuIgual, José ManuelTraveset, AnnaBalearic IslandsIndividual diet compositionIndividual-level networkModularityNestednessPopulation niche widthDespite it is widely accepted that intrapopulation variation is fundamental to ecological and evolutionary processes, this level of information has only recently been included into network analysis of species/population interactions. When done, it has revealed non-random patterns in the distribution of trophic resources. Nestedness in resource use among individuals is the most recurrent observed pattern, often accompanied by an absence of modularity, but no previous studies examine bipartite modularity. We use network analysis to describe the diet composition of the Balearic endemic lizard Podarcis lilfordi in 2 islets at population and individual levels, based on the occurrence of food items in fecal samples. Our objectives are to 1) compare niche structure at both levels, 2) characterize niche partition using nestedness and modularity, and 3) assess how size, sex, season, and spatial location influence niche structure. At population-level niche width was wide, but narrow at the level of the individual. Both islet networks were nested, indicating similar ranking of the food preferences among individuals, but also modular, which was partially explained by seasonality. Sex and body size did not notably affect diet composition. Large niche overlap and therefore possibly relaxed competition were observed among females in one of the islets and during spring on both islets. Likewise, higher modularity in autumn suggests that higher competition could lead to specialization in both populations, because resources are usually scarce in this season. The absence of spatial location influence on niche might respond to fine-grained spatio-temporally distribution of food resources. Behavioral traits, not included in this study, could also influence resource partitioning.This work is framed within projects CGL2017-88122-P and BFU2009-09359 financed by the Spanish Government.Peer reviewedOxford University PressMinisterio de Ciencia, Innovación y Universidades (España)Agencia Estatal de Investigación (España)Comisión Asesora de Investigación Científica y Técnica, CAICYT (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202320232020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10261/309644reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2017-88122-Pinfo:eu-repo/grantAgreement/MICINN//BFU2009-09359https://doi.org/10.1093/cz/zoz028Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3096442026-05-22T06:33:51Z
dc.title.none.fl_str_mv Diet composition of the lizard Podarcis lilfordi (Lacertidae) on 2 small islands: an individual-resource network approach
title Diet composition of the lizard Podarcis lilfordi (Lacertidae) on 2 small islands: an individual-resource network approach
spellingShingle Diet composition of the lizard Podarcis lilfordi (Lacertidae) on 2 small islands: an individual-resource network approach
Santamaría, Silvia
Balearic Islands
Individual diet composition
Individual-level network
Modularity
Nestedness
Population niche width
title_short Diet composition of the lizard Podarcis lilfordi (Lacertidae) on 2 small islands: an individual-resource network approach
title_full Diet composition of the lizard Podarcis lilfordi (Lacertidae) on 2 small islands: an individual-resource network approach
title_fullStr Diet composition of the lizard Podarcis lilfordi (Lacertidae) on 2 small islands: an individual-resource network approach
title_full_unstemmed Diet composition of the lizard Podarcis lilfordi (Lacertidae) on 2 small islands: an individual-resource network approach
title_sort Diet composition of the lizard Podarcis lilfordi (Lacertidae) on 2 small islands: an individual-resource network approach
dc.creator.none.fl_str_mv Santamaría, Silvia
Enoksen, Camilla Aviaaja
Olesen, Jens M.
Tavecchia, Giacomo
Rotger, Andreu
Igual, José Manuel
Traveset, Anna
author Santamaría, Silvia
author_facet Santamaría, Silvia
Enoksen, Camilla Aviaaja
Olesen, Jens M.
Tavecchia, Giacomo
Rotger, Andreu
Igual, José Manuel
Traveset, Anna
author_role author
author2 Enoksen, Camilla Aviaaja
Olesen, Jens M.
Tavecchia, Giacomo
Rotger, Andreu
Igual, José Manuel
Traveset, Anna
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia, Innovación y Universidades (España)
Agencia Estatal de Investigación (España)
Comisión Asesora de Investigación Científica y Técnica, CAICYT (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Balearic Islands
Individual diet composition
Individual-level network
Modularity
Nestedness
Population niche width
topic Balearic Islands
Individual diet composition
Individual-level network
Modularity
Nestedness
Population niche width
description Despite it is widely accepted that intrapopulation variation is fundamental to ecological and evolutionary processes, this level of information has only recently been included into network analysis of species/population interactions. When done, it has revealed non-random patterns in the distribution of trophic resources. Nestedness in resource use among individuals is the most recurrent observed pattern, often accompanied by an absence of modularity, but no previous studies examine bipartite modularity. We use network analysis to describe the diet composition of the Balearic endemic lizard Podarcis lilfordi in 2 islets at population and individual levels, based on the occurrence of food items in fecal samples. Our objectives are to 1) compare niche structure at both levels, 2) characterize niche partition using nestedness and modularity, and 3) assess how size, sex, season, and spatial location influence niche structure. At population-level niche width was wide, but narrow at the level of the individual. Both islet networks were nested, indicating similar ranking of the food preferences among individuals, but also modular, which was partially explained by seasonality. Sex and body size did not notably affect diet composition. Large niche overlap and therefore possibly relaxed competition were observed among females in one of the islets and during spring on both islets. Likewise, higher modularity in autumn suggests that higher competition could lead to specialization in both populations, because resources are usually scarce in this season. The absence of spatial location influence on niche might respond to fine-grained spatio-temporally distribution of food resources. Behavioral traits, not included in this study, could also influence resource partitioning.
publishDate 2020
dc.date.none.fl_str_mv 2020
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/309644
url http://hdl.handle.net/10261/309644
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2017-88122-P
info:eu-repo/grantAgreement/MICINN//BFU2009-09359
https://doi.org/10.1093/cz/zoz028
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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