Predation by an omnivorous fish and food availability alter zooplankton functional diversity: a microcosm approach

Studies considering the functional traits of organisms, populations, and communities indices increase understanding many factors on ecosystem functioning. Here, we analyze predation effect (by fish) zooplankton diversity effects biomass density periphytic algae feeding type trait body size. We expect that intense by fish leads to higher values food resource will be positively related abundance For that, microcosms were established (T1- fish-absence, T2- fish-presence, both with as food). observed presence decreased through modifications in availability nutrients algae, middle-out effect. also size had a negative relationship resource, reaffirming high subtropical lakes is linked small-bodied zooplankton. The raptorial copepods covariate which was an alternative and, this case, main form carbon input into system. In study, omnivorous reduced traits, can alter energy stock flow aquatic ecosystems.