Evolutionary dynamics of specialisation in herbivorous stick insects.

Détails

ID Serval
serval:BIB_100F392F8099
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Evolutionary dynamics of specialisation in herbivorous stick insects.
Périodique
Ecology letters
Auteur(s)
Larose C., Rasmann S., Schwander T.
ISSN
1461-0248 (Electronic)
ISSN-L
1461-023X
Statut éditorial
Publié
Date de publication
2019
Peer-reviewed
Oui
Volume
22
Numéro
2
Pages
354-364
Langue
anglais
Résumé
Understanding the evolutionary dynamics underlying herbivorous insect mega-diversity requires investigating the ability of insects to shift and adapt to different host plants. Feeding experiments with nine related stick insect species revealed that insects retain the ability to use ancestral host plants after shifting to novel hosts, with host plant shifts generating fundamental feeding niche expansions. These expansions were, however, not accompanied by expansions of the realised feeding niches, as species on novel hosts are generally ecologically specialised. For shifts from angiosperm to chemically challenging conifer hosts, generalist fundamental feeding niches even evolved jointly with strong host plant specialisation, indicating that host plant specialisation is not driven by constraints imposed by plant chemistry. By coupling analyses of plant chemical compounds, fundamental and ecological feeding niches in multiple insect species, we provide novel insights into the evolutionary dynamics of host range expansion and contraction in herbivorous insects.
Mots-clé
Chaparral biome, Timema stick insect, host shift, plant secondary metabolites, plant-herbivore interaction, realised vs. fundamental niche, redwood
Pubmed
Web of science
Création de la notice
20/01/2019 17:35
Dernière modification de la notice
12/02/2019 7:26
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