Fig. 4 Distribution of different anthropogenic markers in the Xinfengjiang Riverine Source-Reservoir continuum. (a): coprostanol (ng/g dw), (b) linear alkylbenzenes (LABs) (ng/g dw), (c): unresolved complex mixtures (UCMs) (ng/g dw), (d): brassicasterol (μg/g TOC), (e) dinosterol (μg/g TOC). The middle figure is the sampling sites and land-use patterns map.