Body size of ectotherms often changes with temperature. This can further affect trophic interaction strengths and the stability of food webs. However, the potential significance and magnitude of this effect has not been studied. Results of simulation models by Arnaud Sentis et al. published in Ecology Letters show that this effect depends on the type of temperature-size responses in the interacting populations and the predator-prey body mass ratios. Our results indicate that temperature-dependent body size plays more important role in aquatic food webs and especially for larger predator-prey mass ratios.

Arnaud Sentis, Amrei Binzer and David S. Boukal: Temperature-size responses alter food chain persistence across environmental gradients. Ecology LettersEarly View, DOI: 10.1111/ele.12779