FIGURE 55. Halimione sprigs being dug from the nursery area at 

 lie Grande. 



Invasion of Plantings by Other Plants 



Observations at lie Grande and Kerlavos indicate that other marsh 

 plants invade our experimental plantings more rapidly than they 

 colonize areas that still lack vegetation cover as a result of cleanup 

 operations. In one of our May 1979 experimental plantings of 

 Puccinellia at Kerlavos (Figs. 56, 57, 58), 97% of the transplants in 

 the 60 m^ area had been invaded by at least one other species by May 

 1981 (Fig. 59). Of these transplants which had been invaded, 66% were 

 invaded by two or more other species. The most abundant invader was an 

 annual species of Salicornia which was present in 94% of the 

 transplants sampled. Other invading genera in the order of their 

 percentage of presence per transplant sampled were Cochleria (49%), 

 Halimione (24%), Spergularia (10%), and Armeria (1%). 



413 



