Environmental temperature and body size are two prominent drivers of predation. Despite the ample evidence their independent effects, combined impact predator-prey ratio on strength stability trophic interactions is not fully understood. We experimentally tested how water alters functional response population dragonfly nymphs ( Cordulegaster boltonii ) feeding freshwater amphipods Gammarus pule...

The feeding response of juvenile amphipod Gammarus pulex (L.) was investigated following exposure to freshwater pollutants. The method employed is nondestructive, provides a rapid indication of the status of groups of individuals, and is based on a time-response analysis of the consumption of the eggs of Artemia salina and the determination of median feeding times or FT50s. The feeding activity...

Environmental change and growing anthropogenic pressure on water resources is increasing the duration intensity of drying events in streams many geographical locations. Favourable sediment characteristics (e.g. high porosity low fine load within substrate matrix) may facilitate benthic macroinvertebrate use subsurface sediments response to drying. However, influence sedimentary subsequent recov...