Downstairs drivers - root herbivores shape communities of above-ground herbivores and natural enemies via changes in plant nutrients

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Abstract

This is a clear demonstration of root herbivores affecting foliar herbivore community composition and natural enemy abundance in the field via two distinct plant-mediated nutritional mechanisms. Aphid populations, in particular, are initially driven by bottom-up effects (i.e. plant-mediated effects of root herbivory), but consequent increases in natural enemies trigger top-down regulation.

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