Bird-flower colour on islands supports the bee-avoidance hypothesis

Many insular plant species inhabiting different archipelagos worldwide present typical ornithophilous floral traits (e.g. copious nectar, red-orange colours), but most of them are visited by insectivorous/granivorous birds and lizards, which act as generalist pollinators. Oceanic islands promote the...

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Detalles Bibliográficos
Autores: Rodríguez-Sambruno, Cristina, Narbona, Eduardo, del Valle, José Carlos, Valido, Alfredo
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/341369
Acceso en línea:http://hdl.handle.net/10261/341369
Access Level:acceso abierto
Palabra clave:Bee avoidance
bird attraction
Canary Islands
chromatic contrast
flower colour evolution
ornithophily
plant–animal interactions
visual modelling
http://metadata.un.org/sdg/15
Protect, restore and promote sustainable use of terrestrial ecosystems, sustainably manage forests, combat desertification, and halt and reverse land degradation and halt biodiversity loss
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network_acronym_str ES
network_name_str España
repository_id_str
dc.title.none.fl_str_mv Bird-flower colour on islands supports the bee-avoidance hypothesis
title Bird-flower colour on islands supports the bee-avoidance hypothesis
spellingShingle Bird-flower colour on islands supports the bee-avoidance hypothesis
Rodríguez-Sambruno, Cristina
Bee avoidance
bird attraction
Canary Islands
chromatic contrast
flower colour evolution
ornithophily
plant–animal interactions
visual modelling
http://metadata.un.org/sdg/15
Protect, restore and promote sustainable use of terrestrial ecosystems, sustainably manage forests, combat desertification, and halt and reverse land degradation and halt biodiversity loss
title_short Bird-flower colour on islands supports the bee-avoidance hypothesis
title_full Bird-flower colour on islands supports the bee-avoidance hypothesis
title_fullStr Bird-flower colour on islands supports the bee-avoidance hypothesis
title_full_unstemmed Bird-flower colour on islands supports the bee-avoidance hypothesis
title_sort Bird-flower colour on islands supports the bee-avoidance hypothesis
dc.creator.none.fl_str_mv Rodríguez-Sambruno, Cristina
Narbona, Eduardo
del Valle, José Carlos
Valido, Alfredo
author Rodríguez-Sambruno, Cristina
author_facet Rodríguez-Sambruno, Cristina
Narbona, Eduardo
del Valle, José Carlos
Valido, Alfredo
author_role author
author2 Narbona, Eduardo
del Valle, José Carlos
Valido, Alfredo
author2_role author
author
author
dc.contributor.none.fl_str_mv Fundación CajaCanarias
Fundación la Caixa
European Commission
Ministerio de Ciencia e Innovación (España)
CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Bee avoidance
bird attraction
Canary Islands
chromatic contrast
flower colour evolution
ornithophily
plant–animal interactions
visual modelling
http://metadata.un.org/sdg/15
Protect, restore and promote sustainable use of terrestrial ecosystems, sustainably manage forests, combat desertification, and halt and reverse land degradation and halt biodiversity loss
topic Bee avoidance
bird attraction
Canary Islands
chromatic contrast
flower colour evolution
ornithophily
plant–animal interactions
visual modelling
http://metadata.un.org/sdg/15
Protect, restore and promote sustainable use of terrestrial ecosystems, sustainably manage forests, combat desertification, and halt and reverse land degradation and halt biodiversity loss
description Many insular plant species inhabiting different archipelagos worldwide present typical ornithophilous floral traits (e.g. copious nectar, red-orange colours), but most of them are visited by insectivorous/granivorous birds and lizards, which act as generalist pollinators. Oceanic islands promote these ecological interactions mainly due to the scarcity of arthropods. Our goal is to understand how these generalist interactions contribute to the shift of floral traits from entomophily (mainland) to ornithophily or saurophily (island), where specialist nectar-feeding birds have not inhabited. We used the well-known pollination interactions occurring in the Canary Islands to evaluate two proposed ecological hypotheses, bee-avoidance or bird-attraction, explaining evolutionary transitions of floral traits. Specifically, we studied the flower colour conspicuousness of bird-pollinated Canarian species visited by birds and lizards with their closest relatives from the mainland mainly visited by bees. We analysed the chromatic contrast of flower colours using visual models of bees, birds and lizards and the achromatic contrast in visual models of bees. We also compared reflectance spectra marker points of flowers with available spectral discrimination sensitivities of bees and birds. Using a phylogenetically corrected framework of independent plant lineages, our results revealed that bird-pollinated Canarian species showed lower chromatic contrast according to bees and lizard visual models than their mainland relatives, but similar chromatic contrast for bird vision. In addition, reflectance spectra marker points of the Canarian species were displaced to the longest wavelengths, far from the wavelengths of maximum discrimination of bees, but close to birds. We conclude that the avoidance of bees would be a primary ecological strategy explaining the evolutionary transitions of flower colours from melittophily to ornithophily. The lower conspicuousness of bird-pollinated Canarian flowers in lizards is perhaps a side effect of the bee-avoidance strategy rather than an independent evolutionary strategy. Together, these findings provide insights into how vertebrate generalist pollinators can also lead to divergence of floral traits in insular habitats, but also in other arthropod-poor habitats.
publishDate 2023
dc.date.none.fl_str_mv 2023
2023
2024
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/10261/341369
url http://hdl.handle.net/10261/341369
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-116222GB-I00
https://doi.org/10.1111/1365-2435.14493
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv British Ecological Society
publisher.none.fl_str_mv British Ecological Society
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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spelling Bird-flower colour on islands supports the bee-avoidance hypothesisRodríguez-Sambruno, CristinaNarbona, Eduardodel Valle, José CarlosValido, AlfredoBee avoidancebird attractionCanary Islandschromatic contrastflower colour evolutionornithophilyplant–animal interactionsvisual modellinghttp://metadata.un.org/sdg/15Protect, restore and promote sustainable use of terrestrial ecosystems, sustainably manage forests, combat desertification, and halt and reverse land degradation and halt biodiversity lossMany insular plant species inhabiting different archipelagos worldwide present typical ornithophilous floral traits (e.g. copious nectar, red-orange colours), but most of them are visited by insectivorous/granivorous birds and lizards, which act as generalist pollinators. Oceanic islands promote these ecological interactions mainly due to the scarcity of arthropods. Our goal is to understand how these generalist interactions contribute to the shift of floral traits from entomophily (mainland) to ornithophily or saurophily (island), where specialist nectar-feeding birds have not inhabited. We used the well-known pollination interactions occurring in the Canary Islands to evaluate two proposed ecological hypotheses, bee-avoidance or bird-attraction, explaining evolutionary transitions of floral traits. Specifically, we studied the flower colour conspicuousness of bird-pollinated Canarian species visited by birds and lizards with their closest relatives from the mainland mainly visited by bees. We analysed the chromatic contrast of flower colours using visual models of bees, birds and lizards and the achromatic contrast in visual models of bees. We also compared reflectance spectra marker points of flowers with available spectral discrimination sensitivities of bees and birds. Using a phylogenetically corrected framework of independent plant lineages, our results revealed that bird-pollinated Canarian species showed lower chromatic contrast according to bees and lizard visual models than their mainland relatives, but similar chromatic contrast for bird vision. In addition, reflectance spectra marker points of the Canarian species were displaced to the longest wavelengths, far from the wavelengths of maximum discrimination of bees, but close to birds. We conclude that the avoidance of bees would be a primary ecological strategy explaining the evolutionary transitions of flower colours from melittophily to ornithophily. The lower conspicuousness of bird-pollinated Canarian flowers in lizards is perhaps a side effect of the bee-avoidance strategy rather than an independent evolutionary strategy. Together, these findings provide insights into how vertebrate generalist pollinators can also lead to divergence of floral traits in insular habitats, but also in other arthropod-poor habitats.We thank Juan Arroyo, Manuel Arechavaleta, Salvador Cruz, Félix Medina, Paulino Melchor and Beneharo Rodríguez for the localization of some plant populations, and Jens M Olesen and Jeff Ollerton for constructive comments on the manuscript. Besides national parks of Garajonay (La Gomera) and Taburiente (La Palma) provided facilities to access to some plant populations. A.V. is supported by Fundación Cajacanarias/La Caixa (2022CLISA29), and the program ‘Investigo’ (PRTR-NextGenerationEU). E.N. and J.C.d.V. are funded by Spanish Ministry of Science and Innovation (PID2020-116222GB-100). We acknowledge support of the publication fee by the CSIC Open Access Publication Support Initiative through its Unit of Information Resources for Research (URICI).Peer reviewedBritish Ecological SocietyFundación CajaCanariasFundación la CaixaEuropean CommissionMinisterio de Ciencia e Innovación (España)CSIC - Unidad de Recursos de Información Científica para la Investigación (URICI)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202320232024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/341369reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-116222GB-I00https://doi.org/10.1111/1365-2435.14493Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3413692026-05-22T06:33:51Z
score 15,812455

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