Table 8. Comparative importance vaLues at site 1 fan 

 subdivisions, 1977. 



Species 



Adjacent Peripheral Washover 



marsh 

 0.4 



0.4 



Agropyron pungens 

 Ammophila breviligula+r 

 Artemisia aaudata 

 Artemisia stelleriana 

 Cckile edentula 

 Distiehlis spicaia 

 Lathyrus japonicus 

 Limonium nashii 

 Puaainellia maritima 

 Salicornia Virginian 

 Salsola kali 

 Spartina alterniflora 

 Svartina vavens 



7. 



.9 



14, 



.0 



22 



.2 



42, 



.1 



.09 



.8 



area 



1.4 



0. 



,6 



10. 



,4 



4, 



.3 



36. 



.3 



207, 



.1 



fan 



Total 



7.3 



0.6 



144.4 



4.7 



5.4 



0.1 



2.8 



0.1 



10.8 



0.5 







0.3 



2.0 



0.1 







6.0 







12.5 







17.7 



2.0 



0.1 







39.4 



124.2 



215.3 



var. monogyna and Agropyron pungens (quack grass) appeared in all three 

 areas: these two species are capable of growing on low dunes subject to 

 periodic tidal flooding. All plants on site 1 washover fan originated from 

 regeneration of plant fragments or from seed. None of these species origi- 

 nated from the regrowth of plants below the washover fan. Seedlings of Spar- 

 tina patens, Salsola kali (saltwort), Lathyrus japonicus (beach pea), and 

 Cakile edentula (sea rocket) were noted on the fan in 1977; plant fragments of 

 Ammophila breviligulata and Artemisia stelleriana (dusty miller) were also 

 found on the washover. 



(2) Site 1 Throat . Site 1 throat had not been subject to a major 

 overwash since 1972. Occasionally during the winter, swashes overtopped the 

 benn crest, depositing drift material in the washover throat. Site 1 throat 

 showed signs of vegetative recovery by means of rhizome extension from estab- 

 lished dunes and by colonization from overwash drift lines. A map of site 1 

 throat appears in Figure 31. (Elevation data were not collected between 

 transects 9S and 24S from 60 to iOO meters west.) Very sparse drift-line 

 vegetation dominated by Ammophila breviligulata, Cakile edentula, Artemisia 

 stelleriana, Salsola kali, and Lathyrus japonicus occurred throughout the 

 throat among abundant drift material (7.2 percent cover; Table 9). Well- 

 vegetated Ammophila breviligulata dunes were located at the northern and 

 southern edges of the site. A very dense stand of Ammophila breviligulata 

 grew on the eastern low dune ridge (80 and 90 meters west), which was less 

 densely vegetated with Ammophila breviligulata, Agropyron pungens, Spartina 

 patens, Artemisia caudata (wormwood), and Solidago sempervirens (seaside 

 goldenrod) . A dense stand of Spartina patens var. monogyna (I.V. = 110.0 for 

 the entire plot) was located in the southwest corner of the plot. 



67 



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