2.5 I- 



co 2.0 



a> 

 o 



> 1.5 



■o 



i 1.0 



o 



° 0.5 

 









A Control 



f \ o 



\ 



V 



,-' 



\ H"(diversity) ,^^ 





\ x' X / ^ 

 \ ^^ N / 



N ^ ^ \ 



\ v-- Control • 



• 



1 1 



\ J (evenness) ^^^^..^^^ 



1 1 1 1 1 1 1 1 



Figure 13. Species diversity and evenness of the total fauna 



(upper graph) and number of species of the total fauna 

 (lower graph) (arrow indicates dredging) . 



46 



