Generalized food-deceptive orchid species flower earlier and occur at lower altitudes than rewarding ones

Détails

ID Serval
serval:BIB_5238FE73DF02
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Generalized food-deceptive orchid species flower earlier and occur at lower altitudes than rewarding ones
Périodique
Journal of Plant Ecology
Auteur(s)
Pellissier L., Vittoz P., Internicola A.I., Gigord L.D.B
ISSN
1752-9921
Statut éditorial
Publié
Date de publication
2010
Peer-reviewed
Oui
Volume
3
Numéro
4
Pages
243-250
Langue
anglais
Résumé
Aims
Food-deceptive pollination, in which plants do not offer any food reward to their pollinators, is common within the Orchidaceae. As food-deceptive orchids are poorer competitors for pollinator visitation than rewarding orchids, their occurrence in a given habitat may be more constrained than that of rewarding orchids. In particular, the success of deceptive orchids strongly relies on several biotic factors such as interactions with co-flowering rewarding species and pollinators, which may vary with altitude and over time. Our study compares generalized food-deceptive (i.e. excluding sexually deceptive) and rewarding orchids to test whether (i) deceptive orchids flower earlier compared to their rewarding counterparts and whether (ii) the relative occurrence of deceptive orchids decreases with increasing altitude.
Methods
To compare the flowering phenology of rewarding and deceptive orchids, we analysed data compiled from the literature at the species level over the occidental Palaearctic area. Since flowering phenology can be constrained by the latitudinal distribution of the species and by their phylogenetic relationships, we accounted for these factors in our analysis. To compare the altitudinal distribution of rewarding and deceptive orchids, we used field observations made over the entire Swiss territory and over two Swiss mountain ranges.
Important Findings
We found that deceptive orchid species start flowering earlier than rewarding orchids do, which is in accordance with the hypotheses of exploitation of naive pollinators and/or avoidance of competition with rewarding co-occurring species. Also, the relative frequency of deceptive orchids decreases with altitude, suggesting that deception may be less profitable at high compared to low altitude.
Mots-clé
altitude, timing of flowering, food-deception, European orchids, Orchidaceae, biogeography
Web of science
Open Access
Oui
Création de la notice
27/04/2010 11:40
Dernière modification de la notice
08/05/2019 18:37
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