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Abstract

Fig. 3. Macroinvertebrates colonising alder leaves in coarse-mesh bags at six sampling sites in the Ave River. (a) Taxon richness (\uf067) and mean (± SE) macroinvertebrate density (\uf063); (b) Biological Monitoring Working Party index adapted to the Iberian Peninsula BMWP ́(\uf067) and Belgian Biotic Index BBI (\uf063); and (c) Ephemeroptera+Plecoptera+Trichoptera EPT (\uf067) and Oligochaeta (\uf063), as mean percentage (± SE) of the number of individuals. Data represent five sampling dates.