INDEX 
DOMINANCE 
‘igure 31. 
FORT MACON 
-. EMERALD ISLE 
NOURISHMENT 
Seasonal variation in Simpson's Index of Dominance for the inter- 
tidal zone at the nourishment beach at Fort Macon, June 1977 to 
August 1978, and the comparison beach at Emerald Isle, September 
1977 to August 1978. The actual period of nourishment is repre- 
sented by a slashed line below the X-axis. The bull's eye symbol 
represents an index of dominance that is undefined because no 
organisms were found. 
Sie 
