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Distribution of iridescent colours in hummingbird communities results from the interplay between selection for camouflage and communication

View ORCID ProfileHugo Gruson, View ORCID ProfileMarianne Elias, View ORCID ProfileJuan L. Parra, Christine Andraud, Serge Berthier, View ORCID ProfileClaire Doutrelant, View ORCID ProfileDoris Gomez
doi: https://doi.org/10.1101/586362
Hugo Gruson
1CEFE, Univ Montpellier, CNRS, Univ Paul Valéry Montpellier 3, EPHE, IRD, Montpellier, France
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  • For correspondence: hugo.gruson@normalesup.org
Marianne Elias
2ISYEB, CNRS, MNHN, Sorbonne Université, EPHE, 45 rue Buffon CP50, Paris, France
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  • ORCID record for Marianne Elias
Juan L. Parra
3Grupo de Ecología y Evolución de Vertrebados, Instituto de Biología, Universidad de Antioquia, Medellín, Colombia
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Christine Andraud
4CRC, MNHN, Ministère de la Culture et de la Communication, CNRS, Paris, France
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Serge Berthier
5INSP, Sorbonne Université, CNRS, Paris, France
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Claire Doutrelant
1CEFE, Univ Montpellier, CNRS, Univ Paul Valéry Montpellier 3, EPHE, IRD, Montpellier, France
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Doris Gomez
1CEFE, Univ Montpellier, CNRS, Univ Paul Valéry Montpellier 3, EPHE, IRD, Montpellier, France
5INSP, Sorbonne Université, CNRS, Paris, France
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Abstract

Identification errors between closely related, co-occurring, species may lead to misdirected social interactions such as costly interbreeding or misdirected aggression. This selects for divergence in traits involved in species identification among co-occurring species, resulting from character displacement. On the other hand, predation may select for crypsis, potentially leading co-occurring species that share the same environment and predators to have a similar appearance. However, few studies have explored how these antagonistic processes influence colour at the community level. Here, we assess colour clustering and overdispersion in 189 hummingbird communities, tallying 112 species, across Ecuador and suggest possible evolutionary mechanisms at stake by controlling for species phylogenetic relatedness. In hummingbirds, most colours are iridescent structural colours, defined as colours that change with the illumination or observation angle. Because small variations in the underlying structures can have dramatic effects on the resulting colours and because iridescent structures can produce virtually any hue and brightness, we expect iridescent colours to respond finely to selective pressures. Moreover, we predict that hue angular dependence – a specific aspect of iridescent colours – may be used as an additional channel for species recognition. In our hummingbird assemblages in Ecuador, we find support for colour overdispersion in ventral and facial patches at the community level even after controlling for the phylogeny, especially on iridescence-related traits, suggesting character displacement among co-occurring species. We also find colour clustering at the community level on dorsal patches, suspected to be involved in camouflage, suggesting that the same cryptic colours are selected among co-occurring species.

This article has been peer-reviewed and recommended by Peer Community In Evolutionary Biology

Footnotes

  • Final (recommended) version for PCI EvolBiol

  • https://doi.org/10.5281/zenodo.3355443

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. All rights reserved. No reuse allowed without permission.
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Posted November 19, 2019.
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Distribution of iridescent colours in hummingbird communities results from the interplay between selection for camouflage and communication
Hugo Gruson, Marianne Elias, Juan L. Parra, Christine Andraud, Serge Berthier, Claire Doutrelant, Doris Gomez
bioRxiv 586362; doi: https://doi.org/10.1101/586362
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Distribution of iridescent colours in hummingbird communities results from the interplay between selection for camouflage and communication
Hugo Gruson, Marianne Elias, Juan L. Parra, Christine Andraud, Serge Berthier, Claire Doutrelant, Doris Gomez
bioRxiv 586362; doi: https://doi.org/10.1101/586362

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