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20. ABSTRACT (Continued). 



historical analysis of the development of plant communities and morphological 

 features, and a geologic evaluation of barrier evolution. These comprehensive 

 baseline data on the natural dynamics of a northeast barrier beach can be used 

 to delineate adverse effects of artificial stabilization, particularly dune- 

 building activities. 



All sections of the Nauset Spit system are subject to dramatic changes 

 either by inlet activity or overwash. Each section along the barrier is 

 eventually affected by these physical transport processes over the long term, 

 culminating in landward barrier migration. Artificial creation and mainte- 

 nance of dunes and salt marshes can be used to extend various periods of the 

 migration cycle but will not alter the basic biogeological process. Without 

 human intervention, new dunes and salt marshes will eventually become estab- 

 lished along the barrier within the correct elevational ranges. However, 

 there can be a considerable Mme lag due to the opportunistic conditions 

 necessary for recolonizat ion of barren washovers. Dune-building programs 

 can effectively shorten the time necessary for revegetation and stabiliza- 

 tion of the barrier landform. By working in association with natural 

 processes, segments of the migrational cycle can he expanded but ultimately 

 not restricted. 



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