Table 3.  Benthic macroinvertebrate metrics determined for each stream reach

[EPT, Ephemeroptera-Plecoptera-Trichoptera]

Numbers of taxa
Percentages
Indices
Number of taxa Percent EPT taxa EPT taxa richness
Number of filterers Percent Chironomidae Shannon-Weiner diversity index
Number of gatherers Percent Ephemeroptera Hilsenhoff’s biotic index
Number of predators Percent Oligochaeta Margelef’s richness index
Number of scrapers Percent Plecoptera Pielou’s evenness index
Number of shredders Percent filterers Simpson’s heterogeneity index
  Percent gatherers  
  Percent predators  
  Percent scrapers  
  Percent shredders  

 

Back to Contents | Back to text | Table 4