SPECIES-AREA CURVE 



20 -- 



19 -- 



18 -- 



17 -- 



16 -- 



15 -- 



14 -- 



13 -- 



12 -- 

 w 



CO 



o 10 -- 



I 



i 9-- 



z 



8 -- 



7 -- 

 6 -- 

 5 -- 

 4 -. 



3 -- 

 2 -- 



1 -- 



H \ 1 ] h- 



7 8 9 10 11 

 Number of Quadrats 2 



12 13 14 15 16 17 



^ Plot the cumulative number of species against the quadrats (e.g., if quadrat #1 has 3 species and 

 quadrat #2 has any, all, or none of those species but has 2 new species, then 5 cumulative species 

 should be plotted against quadrat #2). The number of quadrats sufficient to adequately survey the 

 understory will corresdpond to the point on the curve where it first levels off and remains 

 essentially level. 



Specify size of sample quadrat: 



B-10 



