Figure S1 Average flow rates in enhancers.

Figure S2 Species density and local species richness on settlement plates deployed on rock walls and within the control flow treatment of experimental flow enhancers.

Figure S3 Species densities within flow enhancers in 2006.

Figure S4 Species richness within flow enhancers in 2006.

Table S1 Names and locations of all study sites.

Table S2 Effects of flow on turbulence.

Table S3 Effects of flow on species density.

Table S4 Effects of flow on growth rates.

Table S5 Effects of flow on the species richness of recruitment.

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