Sokal, R. R. and F. J. Rohlf. 1969. Biometry, 2nd Ed. 

 W.H. Freeman, San Francisco. 859 pp. 



Sutherland, J. P. 1975. Effects of Schizoporella removal on the 

 fouling community at Beaufort, N.C. In: B. S. Coull, 

 (ed.), Ecology of Marine Benthos. University of South 

 Carolina Press, Columbia, South Carolina, pp. 155-189. 



Sutherland, J. P. and R. H.Karlson. 1977. Development and 



stability of the fouling community at Beaufort, N.C. Ecol. 

 Monogr. 47:425-446. 



Witman, J. D. 1985. Disturbance and subtidal community 

 structure. Ecol. Monogr. 55 (4) : 439-441. 



Witman, J. D. and R. A. Cooper. 1983. Disturbance and 



contrasting patterns of population structure in the 

 brachiopod Terebratulina septentrional is Couthouy from two 

 subtidal habitats. J. Exp. Mar. Biol. Ecol. 73:57-79. 



Witman, J. D. 1987. Subtidal coexistence: Storms, grazing, 

 mutualism and the zonation of kelps and mussels. Ecol. 

 Monogr. 57:167-187. 



Witman, J. D. and K. P. Sebens. 1988. Distribution and 



ecology of sponges at a subtidal rock ledge in the central 

 Gulf of Maine, USA. In Press: Proceedings of the Third 

 International Conference on the Biology of Sponges. 



66 



