Prey limitation drives variation in allometric scaling of predator-prey interactions
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1086/698726 http://hdl.handle.net/11449/180182 |
Resumo: | Ecologists have long searched for a universal size-scaling constant that governs trophic interactions. Although this is an appealing theoretical concept, predator-prey size ratios (PPSRs) vary strikingly across and within natural food webs, meaning that predators deviate from their optimal prey size by consuming relatively larger or smaller prey. Here we suggest that this unexpected variation in allometric scaling of trophic interactions can be predicted by gradients of prey limitation consistent with predictions from optimal foraging theory. We analyzed >6,000 trophic interactions of 52 populations from four tropical frog species along a gradient of prey limitation. The mean of PPSR and its variance differed up to two orders of magnitude across and within food webs. Importantly, as prey availability decreased across food webs, PPSR and its variance became more size dependent. Thus, trophic interactions did not follow a fixed allometric scaling but changed predictably with the strength of prey limitation. Our results emphasize the importance of ecological contexts in arranging food webs and the need to incorporate ecological drivers of PPSR and its variance in food web and community models. |
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Repositório Institucional da UNESP |
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Prey limitation drives variation in allometric scaling of predator-prey interactionsFood webPredator-prey mass ratioPredator-prey size ratioPrey availabilitySize scalingTrophic interactionsEcologists have long searched for a universal size-scaling constant that governs trophic interactions. Although this is an appealing theoretical concept, predator-prey size ratios (PPSRs) vary strikingly across and within natural food webs, meaning that predators deviate from their optimal prey size by consuming relatively larger or smaller prey. Here we suggest that this unexpected variation in allometric scaling of trophic interactions can be predicted by gradients of prey limitation consistent with predictions from optimal foraging theory. We analyzed >6,000 trophic interactions of 52 populations from four tropical frog species along a gradient of prey limitation. The mean of PPSR and its variance differed up to two orders of magnitude across and within food webs. Importantly, as prey availability decreased across food webs, PPSR and its variance became more size dependent. Thus, trophic interactions did not follow a fixed allometric scaling but changed predictably with the strength of prey limitation. Our results emphasize the importance of ecological contexts in arranging food webs and the need to incorporate ecological drivers of PPSR and its variance in food web and community models.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Universidade Estadual Paulista (UNESP)Instituto de Biociências UNESPBioSciences Rice UniversityInstituto de Biociências Universidade Federal de Mato Grosso do SulUniversidade Estadual Paulista (UNESP)Instituto de Biociências UNESPFAPESP: 2010/15567-8FAPESP: 2014/20924-5FAPESP: 2016/09038-9Universidade Estadual Paulista (Unesp)Rice UniversityUniversidade Federal de Mato Grosso do Sul (UFMS)Costa-Pereira, Raul [UNESP]Araújo, Márcio Silva [UNESP]Olivier, Renan da SilvaSouza, Franco L.Rudolf, Volker H. W.2018-12-11T17:38:31Z2018-12-11T17:38:31Z2018-10-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleE139-E149application/pdfhttp://dx.doi.org/10.1086/698726American Naturalist, v. 192, n. 4, p. E139-E149, 2018.0003-0147http://hdl.handle.net/11449/18018210.1086/6987262-s2.0-850533564092-s2.0-85053356409.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAmerican Naturalist2,661info:eu-repo/semantics/openAccess2023-12-01T06:14:47Zoai:repositorio.unesp.br:11449/180182Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:13:35.548184Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Prey limitation drives variation in allometric scaling of predator-prey interactions |
title |
Prey limitation drives variation in allometric scaling of predator-prey interactions |
spellingShingle |
Prey limitation drives variation in allometric scaling of predator-prey interactions Costa-Pereira, Raul [UNESP] Food web Predator-prey mass ratio Predator-prey size ratio Prey availability Size scaling Trophic interactions |
title_short |
Prey limitation drives variation in allometric scaling of predator-prey interactions |
title_full |
Prey limitation drives variation in allometric scaling of predator-prey interactions |
title_fullStr |
Prey limitation drives variation in allometric scaling of predator-prey interactions |
title_full_unstemmed |
Prey limitation drives variation in allometric scaling of predator-prey interactions |
title_sort |
Prey limitation drives variation in allometric scaling of predator-prey interactions |
author |
Costa-Pereira, Raul [UNESP] |
author_facet |
Costa-Pereira, Raul [UNESP] Araújo, Márcio Silva [UNESP] Olivier, Renan da Silva Souza, Franco L. Rudolf, Volker H. W. |
author_role |
author |
author2 |
Araújo, Márcio Silva [UNESP] Olivier, Renan da Silva Souza, Franco L. Rudolf, Volker H. W. |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Rice University Universidade Federal de Mato Grosso do Sul (UFMS) |
dc.contributor.author.fl_str_mv |
Costa-Pereira, Raul [UNESP] Araújo, Márcio Silva [UNESP] Olivier, Renan da Silva Souza, Franco L. Rudolf, Volker H. W. |
dc.subject.por.fl_str_mv |
Food web Predator-prey mass ratio Predator-prey size ratio Prey availability Size scaling Trophic interactions |
topic |
Food web Predator-prey mass ratio Predator-prey size ratio Prey availability Size scaling Trophic interactions |
description |
Ecologists have long searched for a universal size-scaling constant that governs trophic interactions. Although this is an appealing theoretical concept, predator-prey size ratios (PPSRs) vary strikingly across and within natural food webs, meaning that predators deviate from their optimal prey size by consuming relatively larger or smaller prey. Here we suggest that this unexpected variation in allometric scaling of trophic interactions can be predicted by gradients of prey limitation consistent with predictions from optimal foraging theory. We analyzed >6,000 trophic interactions of 52 populations from four tropical frog species along a gradient of prey limitation. The mean of PPSR and its variance differed up to two orders of magnitude across and within food webs. Importantly, as prey availability decreased across food webs, PPSR and its variance became more size dependent. Thus, trophic interactions did not follow a fixed allometric scaling but changed predictably with the strength of prey limitation. Our results emphasize the importance of ecological contexts in arranging food webs and the need to incorporate ecological drivers of PPSR and its variance in food web and community models. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12-11T17:38:31Z 2018-12-11T17:38:31Z 2018-10-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1086/698726 American Naturalist, v. 192, n. 4, p. E139-E149, 2018. 0003-0147 http://hdl.handle.net/11449/180182 10.1086/698726 2-s2.0-85053356409 2-s2.0-85053356409.pdf |
url |
http://dx.doi.org/10.1086/698726 http://hdl.handle.net/11449/180182 |
identifier_str_mv |
American Naturalist, v. 192, n. 4, p. E139-E149, 2018. 0003-0147 10.1086/698726 2-s2.0-85053356409 2-s2.0-85053356409.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
American Naturalist 2,661 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
E139-E149 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129036659982336 |