Species per 0.1 m' plot 



Species per 0.1 m^ plot 



Species per 20 plots 



10-1 



9- 



8- 



7- 



6- 



a. 

 (ft 



5- 



4- 



3- 



2- 





— I 1 1 



1978 1979 1980 



I0-, 



9 - 



0) O - 



a. 

 to 



4- 



3- 



2- 



• Species per 20 plots 



1978 



— I \ 



1979 1980 



Figure 18. Species density in the Dist 

 community, 1978-1980. 



Figure 19. Species density in the 



Bogr community, 1978-1980. 



-24- 



