Micro‐computed tomography scanning approaches to quantify, parameterize and visualize bioturbation activity in clogged streambeds: A proof of concept

Fine particle clogging and faunal bioturbation are two key processes co-occurring in the hyporheic zone that potentially affect exchange through modifications sediment structure of streambeds. Clogging results from excessive fine infiltration deposition rivers, it is known to decrease matrix porosity reduce permeability. Faunal activity may compensate for negative effect by reworking sediment, increasing porosity, preventing further fines. Although both have received significant attention literature separately, their combined effects on streambed not well understood, mostly due lack a standard methodology assessment. Here, we illustrate novel using X-ray computed tomography (CT), as proof concept, investigate how, together, controlled flow-through flume. By visualising gallery formations an upward conveyor macroinvertebrate; Lumbriculus variegatus model species, quantified clogged streambed, focusing orientation, depth, volume at downwelling upwelling areas Gallery creation increased suggesting potential improvement permeability possible offset effects. We promising use CT tool assess streambeds, role supporting warranting studies understand extent impacts natural systems.