How important are river catchments in defining bioregions?

I am currently working on a podcast series about the Highland Boundary Fault. As part of this I recently interviewed Clare Cooper and Marian Bruce in Marian’s farmhouse on the edge of the town of Aylth, north-west of Perth. The

floating stones

floating stones by the artist collective ~ in the fields is a sea-based art installation, which was temporarily placed in White Bay, Tarbert (Argyll) in July 2013. floating stones is made from selected plastic litter, found on beaches throughout Kintyre,