The type and intensity of plant–herbivore interactions are likely to be changed under climate change as a consequence of differential dispersal rates of plants and their herbivores. In a new study published in AoB PLANTS, Dostálek et al. found that Salvia nubicola distributed along a broad altitudinal gradient developed a range of defence strategies against insect herbivores. The strategies, however, do not seem to be used simultaneously in all populations even though most of them are correlated with the altitudinal gradient along which herbivore pressure is decreasing. This shows the importance of simultaneous study of different defence strategies since understanding trade-offs among them could be necessary for detecting the mechanisms by which plants are able to cope with changes in plant–herbivore interactions as a consequence of future climate change.
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