In addition to abiotic effects, selection caused by biotic interactions may also vary between terrestrial and freshwater ecosystems (Götheet al. 2013; Pringle et al. 2016; García-Girón et al. 2020). Specifically, consumptive pressure via predation is thought to be stronger in aquatic systems (Cyr & Face 1993; Cebrian & Lartigue 2004; Alofs & Jackson 2014). This may be because freshwater systems have a higher prevalence of generalist consumers, which cause strong top-down control (Cyr & Face 1993; Shurin & Smith 2006; Alofs & Jackson 2014). Alternatively, the generally higher nutritional quality of freshwater organisms (Twining et al. 2019; Shipley et al. 2022) may support larger consumer populations and thus increase predation pressure. However, the high consumptive pressure in freshwaters could also be due to greater heterogeneity in density of predators caused by dispersal limitation, which would lead to a higher naïvete of prey populations compared to terrestrial habitats (Cox & Lima 2006; Anton et al. 2016, 2020). Finally, many studies highlight differences in selective pressures within freshwaters between lakes and streams, and suggest that biotic resistance is weaker in streams (Mitchell & Knouft 2009; Alofs & Jackson 2014).