54 



. tt»MflWM — n a<. 





Plate 9.— Classification: system Estuarine, subsystem Subtidal, class Aquatic Bed, subclass Rooted Vascular, dominance type 

 Myriophyllum spicatum, water regime Subtidal, water chemistry Mixohaline. Subordinate plant species include mare's tail 

 (Hippuris tetraphylla) and crowfoot (Ranuncultis pallasii). This pond is located on coastal tundra; it is flooded with tidal water 

 only during exceptionally high tides (less often than monthly). Plants characterizing the aquatic bed are shown in the photo-inset. 

 (Between Azun and Narokachik Rivers, Yukon-Kuskokwim Delta, Alaska; July 1985; Photo by F. C. Golet) 



