Host specialist clownfishes are environmental niche generalists.

Détails

ID Serval
serval:BIB_25F05E750D6C
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Host specialist clownfishes are environmental niche generalists.
Périodique
Proceedings of the Royal Society. B Biological Sciences
Auteur(s)
Litsios G., Kostikova A., Salamin N.
ISSN
1471-2954 (Electronic)
ISSN-L
0962-8452
Statut éditorial
Publié
Date de publication
2014
Volume
281
Numéro
1795
Pages
20133220-20133220
Langue
anglais
Résumé
Why generalist and specialist species coexist in nature is a question that has interested evolutionary biologists for a long time. While the coexistence of specialists and generalists exploiting resources on a single ecological dimension has been theoretically and empirically explored, biological systems with multiple resource dimensions (e.g. trophic, ecological) are less well understood. Yet, such systems may provide an alternative to the classical theory of stable evolutionary coexistence of generalist and specialist species on a single resource dimension. We explore such systems and the potential trade-offs between different resource dimensions in clownfishes. All species of this iconic clade are obligate mutualists with sea anemones yet show interspecific variation in anemone host specificity. Moreover, clownfishes developed variable environmental specialization across their distribution. In this study, we test for the existence of a relationship between host-specificity (number of anemones associated with a clownfish species) and environmental-specificity (expressed as the size of the ecological niche breadth across climatic gradients). We find a negative correlation between host range and environmental specificities in temperature, salinity and pH, probably indicating a trade-off between both types of specialization forcing species to specialize only in a single direction. Trade-offs in a multi-dimensional resource space could be a novel way of explaining the coexistence of generalist and specialists.
Mots-clé
anemone, anemonefish, intraspecific variation, mutualism, trade-off
Pubmed
Web of science
Open Access
Oui
Création de la notice
14/10/2014 9:37
Dernière modification de la notice
20/08/2019 13:04
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