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- Title
Divergent pheromone-mediated insect behaviour under global atmospheric change.
- Authors
Mondor, Edward B.; Tremblay, Michelle N.; Awmack, Caroline S.; Lindroth, Richard L.
- Abstract
While the effects of global atmospheric changes on vegetation and resulting insect populations(‘bottom-up interactions’) are being increasingly studied, how these gases modify interactions among insects and their natural enemies (‘top-down interactions’) is less clear. As natural enemy efficacy is governed largely by behavioural mechanisms, altered prey finding and prey defence may change insect population dynamics. Here we show that pheromone-mediated escape behaviours, and hence the vulnerability of insects to natural enemies, are divergent under atmospheric conditions associated with global climate change.Chaitophorus stevensis, a common aphid on trembling aspen trees,Populus tremuloides, have diminished escape responses in enriched carbon dioxide (CO2) environments, while those in enriched ozone (O3) have augmented escape responses, to alarm pheromone. These results suggest that divergent pheromone-mediated behaviours could alter predator–prey interactions in future environments.
- Subjects
INSECT behavior; PHEROMONES; CLIMATE change; ECOLOGY; BIOLOGY; ATMOSPHERE
- Publication
Global Change Biology, 2004, Vol 10, Issue 10, p1820
- ISSN
1354-1013
- Publication type
Article
- DOI
10.1111/j.1365-2486.2004.00838.x