Imagine that you found these organisms in a river. Would that be a good or a bad signal? Do some web searching in order to know some characteristics of the organisms. That will help you! Don’t forget to copy the table in your notebook.


Indicator organisms

Good ecological status

Poor ecological status

Austropotamobius pallipes    
Ephemera danica    
Sympetrum fonscolombii    
Bithunia tentaculata    
Hydrometra stagnorum    
Salmo trutta    
Cyprinus carpi    
Nitzschia palea    
Gyrosigma attenuatum    
Cuereta citrina    
Parus major    
Rattus rattus