Fig. 5

The number of cases per study design in relation to the type of comparator used. Comparator type: NONE: no comparator; NOINT: no intervention (i.e., no change in a flow component or the base level of a flow component); ALT: alternative intervention; ALTUNSPEC: alternative intervention for studies that do not specify a particular component of flow; UNREG: an unregulated waterbody for studies that do not specify a particular component of flow; UNCLEAR: unclear comparator type. Codes for study designs are detailed in Table 1. Data labels are placed on study designs that accounted for < 1% of included cases