Université de Fribourg

The effects of mutualistic ants on aphid life history traits

Flatt, Thomas ; Weisser, Wolfgang W.

In: Ecology, 2000, vol. 81, no. 12, p. 3522-3529

The relationship between homopterans and ants is generally thought to be mutualistic, as both partners seem to benefit from an association. In aphids, previous studies have shown that ant tending improves the survival and reproduction of aphid colonies, mainly by protection of aphids from enemy attack. However, the effects of ant tending on the fitness of individual aphids have rarely been...

Université de Fribourg

Differential allocation and deployment of direct and indirect defences by Vicia sepium along elevation gradients

Rasmann, Sergio ; Buri, Aline ; Gallot-Lavallée, Marie ; Joaquim, Jessica ; Purcell, Jessica ; Pellissier, Loïc

In: Journal of Ecology, 2014, p. -

Dissecting drivers of plant defence investment remains central for understanding the assemblage of communities across different habitats. There is increasing evidence that direct defence strategies against herbivores, including secondary metabolites production, differ along ecological gradients in response to variation in biotic and abiotic conditions. In contrast, intraspecific variation in...