Functional traits
We divided the genera of aquatic insects into nine groups of organisms with different life history strategies. These groups were formed by combinations of morphological (body shape and morphological structures for fixation in the substrate) and reproductive (life cycle length and potential number of reproductive cycles) functional traits relevant for the permanence and colonization of insects in streams subject to environmental disturbances (Poff et al. 2006, Verberk et al. 2013, Sarremejane et al. 2020). The body shape of the insects collected during the experiment was divided into depressed and cylindrical bodies. The morphological structures for fixation were divided into present and absent. The life cycle length was separated into organisms with relatively short and long cycles and the potential number of reproductive cycles was divided into low and high. The classification into long, short, low or high for functional traits is relative to the set of aquatic genera species observed in the study, taking into account the total time of the study (39 days). Thus, when referring to a long-life cycle, the implication is that an organism of the group has the potential to survive in the watercourse for the total study period. The same reasoning can be used for the number of potential reproductive cycles.