ALT (a) Plot using macroinvertebrate Benthic Index of Biotic Integrity (B-IBI) data for study area streams, showing the relationship between B-IBI condition and corresponding Index of Watershed Integrity (IWI) and Index of Catchment Integrity (ICI) values. Pie charts give the distribution of each B-IBI class in each quadrant. (b) Map showing study area catchments’ IWI and ICI levels, & sample locations & B-IBI conditions