Figures & data
Figure 1. Po river and location of the four sites with different flow permanence.
Table I. Main physical factors in the four stations of the Po river.
Table II. Main chemical parameters in the four stations of the Po river.
Table III. List of macroinvertebrates collected in the natural riverbed of the four stations. Biological and ecological traits are given according to Usseglio‐Polatera et al. (Citation2000); Functional Feeding Groups according to Merritt and Cummins (Citation1996).
Figure 2. Invertebrate abundance in the four station with different flow permanence(mean±SE).
Figure 3. Taxonomic richness in the four station with different flow permanence(mean±SE).
Figure 4. Percent functional composition of the four station(upper left) and relative importance of the five Functional Feeding Groups in the four stations (Cg = Collectors–gatherers; F = Filterers; P = Predators; Sc = Scrapers; Sh = Shredders).
Figure 5. Relative importance of taxa belonging to different‘biological groups’ in the stations 1 and 4, according to Usseglio‐Polatera et al. (Citation2000).
Figure 6. Differences among the four station in the presence of the representative‘ecological groups’ C and F.
Figure 7. Accumulation curves for the invertebrate taxa sampled in the four sites.
Figure 8. Temporal variation of taxa richness in the four stations.
Figure 9. Temporal variation of invertebrate abundance in the four stations(individuals/m2).
