Distinct boundaries, where biological and physicochemical environments change abruptly,
occur in nature and, at least superficially, riverbanks appear to separate terrestrial from
aquatic systems. However, at depth, catchment groundwater is linked to channel water via
the hyporheic zone. Complex hydrological interactions between these two water masses in
the hyporheic zone, combined with biogeochemical processes, produce a set of
physicochemical conditions that support the hyporheos–a community of invertebrates and …