Skip to Main content Skip to Navigation
New interface
Journal articles

Insect herbivores should follow plants escaping their relatives

Abstract : Neighboring plants within a local community may be separated by many millions of years of evolutionary history, potentially reducing enemy pressure by insect herbivores. However, it is not known how the evolutionary isolation of a plant affects the fitness of an insect herbivore living on such a plant, especially the herbivore’s enemy pressure. Here, we suggest that evolutionary isolation of host plants may operate similarly as spatial isolation and reduce the enemy pressure per insect herbivore. We investigated the effect of the phylogenetic isolation of host trees on the pressure exerted by specialist and generalist enemies (parasitoids and birds) on ectophagous Lepidoptera and galling Hymenoptera.We found that the phylogenetic isolation of host trees decreases pressure by specialist enemies on these insect herbivores. In Lepidoptera, decreasing enemy pressure resulted from the density dependence of enemy attack, a mechanism often observed in herbivores. In contrast, in galling Hymenoptera, enemy pressure declined with the phylogenetic isolation of host trees per se, as well as with the parallel decline in leaf damage by non-galling insects. Our results suggest that plants that leave their phylogenetic ancestral neighborhood can trigger, partly through simple density-dependency, an enemy release and fitness increase of the few insect herbivores that succeed in tracking these plants.
Document type :
Journal articles
Complete list of metadata

Cited literature [30 references]  Display  Hide  Download
Contributor : Valerie Briand Connect in order to contact the contributor
Submitted on : Monday, June 29, 2015 - 2:30:57 PM
Last modification on : Thursday, July 7, 2022 - 6:07:22 AM
Long-term archiving on: : Wednesday, September 16, 2015 - 6:25:55 AM


Insect herbivores should follo...
Publication funded by an institution



Benjamin Yguel, Richard I. Bailey, Claire Villemant, Amaury Brault, Hervé Jactel, et al.. Insect herbivores should follow plants escaping their relatives. Oecologia, 2014, 176 (2), pp.521-532. ⟨10.1007/s00442-014-3026-3⟩. ⟨hal-01082979⟩



Record views


Files downloads