Testing the contribution of vertebrate predators and leaf traits to mainland–island differences in insect herbivory on oaks

1. Ecological theory predicts that herbivory should be weaker on islands than on mainland based on the assumption that islands have lower herbivore abundance and diversity. However, empirical tests of this prediction are rare, especially for insect herbivores, and those few tests often fail to addre...

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Autores: Vázquez-González, Carla, Abdala-Roberts, Luis, Lago- Núñez, Beatriz, Dean, Lydia S., Capó, Miguel, de la Mata, Raúl, Tack, Ayco J. M., Stenberg, Johan A., Covelo Núñez, Felisa, Cao, Ana, Cursach, Joana, Hernández Serrano, Ana, Hansen, Finn, Mooney, Kailen A., Moreira, Xoaquín
Formato: artículo
Fecha de publicación:2024
País:España
Recursos:Universidad Pablo de Olavide (UPO)
Repositorio:RIO. Repositorio Institucional Olavide
Idioma:inglés
OAI Identifier:oai:rio.upo.es:10433/22008
Acesso em linha:https://hdl.handle.net/10433/22008
Access Level:acceso abierto
Palavra-chave:Bottom-up effects
Chemical defences
Island–mainland comparisons
Multi-trophic interactions
Plant–herbivore interactions
Top-down effects
Vertebrate predators
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spelling Testing the contribution of vertebrate predators and leaf traits to mainland–island differences in insect herbivory on oaksVázquez-González, CarlaAbdala-Roberts, LuisLago- Núñez, BeatrizDean, Lydia S.Capó, Miguelde la Mata, RaúlTack, Ayco J. M.Stenberg, Johan A.Covelo Núñez, FelisaCao, AnaCursach, JoanaHernández Serrano, AnaHansen, FinnMooney, Kailen A.Moreira, XoaquínBottom-up effectsChemical defencesIsland–mainland comparisonsMulti-trophic interactionsPlant–herbivore interactionsTop-down effectsVertebrate predators1. Ecological theory predicts that herbivory should be weaker on islands than on mainland based on the assumption that islands have lower herbivore abundance and diversity. However, empirical tests of this prediction are rare, especially for insect herbivores, and those few tests often fail to address the mechanisms behind island–mainland divergence in herbivory. In particular, past studies have not addressed the relative contribution of top-down (i.e. predator-driven) and bottom- up (i.e. plant-driven) factors to these dynamics. 2. To address this, we experimentally excluded insectivorous vertebrate predators (e.g. birds, bats) and measured leaf traits associated with herbivory in 52 populations of 12 oak (Quercus) species in three island–mainland sites: The Channel Islands of California vs. mainland California, Balearic Islands vs. mainland Spain, and the island Bornholm vs. mainland Sweden (N = 204 trees). In each site, at the end of the growing season, we measured leaf damage by insect herbivores on control vs. predator-excluded branches and measured leaf traits, namely: phenolic compounds, specific leaf area, and nitrogen and phosphorous content. In addition, we obtained climatic and soil data for island and mainland populations using global databases. Specifically, we tested for island–mainland differences in herbivory, and whether differences in vertebrate predator effects or leaf traits between islands and mainland contributed to explaining the observed herbivory patterns. 3. Supporting predictions, herbivory was lower on islands than on mainland, but only in the case of Mediterranean sites (California and Spain). We found no evidence for vertebrate predator effects on herbivory on either islands or mainland in any study site. In addition, while insularity affected leaf traits in some of the study sites (Sweden-Bornholm and California), these effects were seemingly unrelated to differences in herbivory. 4. Synthesis. Our results suggest that vertebrate predation and the studied leaf traits did not contribute to island–mainland variation patterns in herbivory, calling for more nuanced and comprehensive investigations of predator and plant trait effects, including measurements of other plant traits and assessments of predation by different groups of natural enemies.Wiley20242024-11-2820242024-11-0520242024-11-05journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10433/22008reponame:RIO. Repositorio Institucional Olavideinstname:Universidad Pablo de Olavide (UPO)InglésengAgencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2023-2026 PID2022-141761OB-I00 UNDERSTANDING INSULARITY EFFECTS ON PLANT-HERBIVORE INTERACTIONS TO PROMOTE INSULAR BIODIVERSITY CONSERVATIONAgencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 EUR2023-143463Xunta de Galicia http://dx.doi.org/10.13039/501100010801 Fulbright Spain IN606B 2021open accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:rio.upo.es:10433/220082026-06-13T12:46:27Z
dc.title.none.fl_str_mv Testing the contribution of vertebrate predators and leaf traits to mainland–island differences in insect herbivory on oaks
title Testing the contribution of vertebrate predators and leaf traits to mainland–island differences in insect herbivory on oaks
spellingShingle Testing the contribution of vertebrate predators and leaf traits to mainland–island differences in insect herbivory on oaks
Vázquez-González, Carla
Bottom-up effects
Chemical defences
Island–mainland comparisons
Multi-trophic interactions
Plant–herbivore interactions
Top-down effects
Vertebrate predators
title_short Testing the contribution of vertebrate predators and leaf traits to mainland–island differences in insect herbivory on oaks
title_full Testing the contribution of vertebrate predators and leaf traits to mainland–island differences in insect herbivory on oaks
title_fullStr Testing the contribution of vertebrate predators and leaf traits to mainland–island differences in insect herbivory on oaks
title_full_unstemmed Testing the contribution of vertebrate predators and leaf traits to mainland–island differences in insect herbivory on oaks
title_sort Testing the contribution of vertebrate predators and leaf traits to mainland–island differences in insect herbivory on oaks
dc.creator.none.fl_str_mv Vázquez-González, Carla
Abdala-Roberts, Luis
Lago- Núñez, Beatriz
Dean, Lydia S.
Capó, Miguel
de la Mata, Raúl
Tack, Ayco J. M.
Stenberg, Johan A.
Covelo Núñez, Felisa
Cao, Ana
Cursach, Joana
Hernández Serrano, Ana
Hansen, Finn
Mooney, Kailen A.
Moreira, Xoaquín
author Vázquez-González, Carla
author_facet Vázquez-González, Carla
Abdala-Roberts, Luis
Lago- Núñez, Beatriz
Dean, Lydia S.
Capó, Miguel
de la Mata, Raúl
Tack, Ayco J. M.
Stenberg, Johan A.
Covelo Núñez, Felisa
Cao, Ana
Cursach, Joana
Hernández Serrano, Ana
Hansen, Finn
Mooney, Kailen A.
Moreira, Xoaquín
author_role author
author2 Abdala-Roberts, Luis
Lago- Núñez, Beatriz
Dean, Lydia S.
Capó, Miguel
de la Mata, Raúl
Tack, Ayco J. M.
Stenberg, Johan A.
Covelo Núñez, Felisa
Cao, Ana
Cursach, Joana
Hernández Serrano, Ana
Hansen, Finn
Mooney, Kailen A.
Moreira, Xoaquín
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv Bottom-up effects
Chemical defences
Island–mainland comparisons
Multi-trophic interactions
Plant–herbivore interactions
Top-down effects
Vertebrate predators
topic Bottom-up effects
Chemical defences
Island–mainland comparisons
Multi-trophic interactions
Plant–herbivore interactions
Top-down effects
Vertebrate predators
description 1. Ecological theory predicts that herbivory should be weaker on islands than on mainland based on the assumption that islands have lower herbivore abundance and diversity. However, empirical tests of this prediction are rare, especially for insect herbivores, and those few tests often fail to address the mechanisms behind island–mainland divergence in herbivory. In particular, past studies have not addressed the relative contribution of top-down (i.e. predator-driven) and bottom- up (i.e. plant-driven) factors to these dynamics. 2. To address this, we experimentally excluded insectivorous vertebrate predators (e.g. birds, bats) and measured leaf traits associated with herbivory in 52 populations of 12 oak (Quercus) species in three island–mainland sites: The Channel Islands of California vs. mainland California, Balearic Islands vs. mainland Spain, and the island Bornholm vs. mainland Sweden (N = 204 trees). In each site, at the end of the growing season, we measured leaf damage by insect herbivores on control vs. predator-excluded branches and measured leaf traits, namely: phenolic compounds, specific leaf area, and nitrogen and phosphorous content. In addition, we obtained climatic and soil data for island and mainland populations using global databases. Specifically, we tested for island–mainland differences in herbivory, and whether differences in vertebrate predator effects or leaf traits between islands and mainland contributed to explaining the observed herbivory patterns. 3. Supporting predictions, herbivory was lower on islands than on mainland, but only in the case of Mediterranean sites (California and Spain). We found no evidence for vertebrate predator effects on herbivory on either islands or mainland in any study site. In addition, while insularity affected leaf traits in some of the study sites (Sweden-Bornholm and California), these effects were seemingly unrelated to differences in herbivory. 4. Synthesis. Our results suggest that vertebrate predation and the studied leaf traits did not contribute to island–mainland variation patterns in herbivory, calling for more nuanced and comprehensive investigations of predator and plant trait effects, including measurements of other plant traits and assessments of predation by different groups of natural enemies.
publishDate 2024
dc.date.none.fl_str_mv 2024
2024-11-28
2024
2024-11-05
2024
2024-11-05
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10433/22008
url https://hdl.handle.net/10433/22008
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2023-2026 PID2022-141761OB-I00 UNDERSTANDING INSULARITY EFFECTS ON PLANT-HERBIVORE INTERACTIONS TO PROMOTE INSULAR BIODIVERSITY CONSERVATION
Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 EUR2023-143463
Xunta de Galicia http://dx.doi.org/10.13039/501100010801 Fulbright Spain IN606B 2021
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
dc.source.none.fl_str_mv reponame:RIO. Repositorio Institucional Olavide
instname:Universidad Pablo de Olavide (UPO)
instname_str Universidad Pablo de Olavide (UPO)
reponame_str RIO. Repositorio Institucional Olavide
collection RIO. Repositorio Institucional Olavide
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869403873433616384
score 15.811543

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