— 2m 

 - I m 



- 



Unvsgeloted 



Atnmopfcllo breviliguloto 

 Solsolo koll 



100 pet cover 

 1 50 



Figure 129. Vegetative-physiographic transect of belt J. 



Belt L is located at the southern end of North Beach. Untii 1970 this 

 belt was characterized by unvegetated washovers (Fig. 124), but two well- 

 developed spit recurves had developed by 1978. Trie seaward recurve had dunes 

 1.75 meters high and 110 meters wide; the back-barrier recurve was 3 meters 

 high and 70 meters wide (Fig. 130). Natural dunes as formidable and as 

 rapidly built as those constructed at belts X and Y were present at belt L in 

 1978. These dunes rapidly increased in elevation benefiting from the abundant 

 sand available for dune building at the spit terminus. Winds traveling over 

 barren sand sources from all directions added sediment to the dunes. Tha 

 greatest dune development occurred on the western recurve reflecting the pre- 

 dominant northwest and southwest winds on Cape Cod. Since these dunes were 

 accreting very rapidly, Ar^mor.hili breviiigulata was the only major plant 

 species sampled within the belt. 



120 160 200 240 280E 



Urtvegeioled 



Ammophilo brevtliqutota 

 Artemisia stellariorto 





_SScs_SE»£^3U. 



100 pet cover 

 50 



Figure 130. Vegetative-physiographic transect of belt L. 



207 



