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| 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 (Ranunculus 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) |
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| Plate 10.--Classification: SYSTEM Estuarine, SUBSYSTEM Intertidal, CLASS Reef, SUBCLASS Mollusk, DOMINANCE TYPE Crassostrea virginica, WATER REGIME Regularly Flooded, WATER CHEMISTRY Mixohaline. An individual red mangrove (Rhizophora mangle) has become established on this oyster reef. (Rookery Bay Sanctuary, Collier County, Florida; January 1978; Photo by E. T. LaRoe) |
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| Plate 11.--Classification: SYSTEM Estuarine, SUBSYSTEM Intertidal, CLASS Streambed, SUBCLASS Mud, WATER REGIME Regularly Flooded, WATER CHEMISTRY Mixohaline. This photo was taken at low tide; at high tide, the entire channel is flooded. The channel is flanked by irregularly flooded persistent-emergent wetland supporting such plants as: lyme grass (Elymus arenarius), beach lovage (Ligusticum scothicum), silverweed (Potentilla anserina), sedges (Carex ramenskii, C. bipartita), ovalleaf willow (Salix ovalifolia), and Arctic daisy (Dendranthema arcticum). This site lies 100 m from Angyoyaravak Bay, on the Bering Sea. (Tutakoke River area, Yukon-Kuskokwim Delta, Alaska; July 1985; Photo by F. C. Golet) |
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| Plate 12.--Two habitats lie at the edge of this manmade breakwater. Classification of upper (lighter) zone: SYSTEM Estuarine, SUBSYSTEM Intertidal, CLASS Rocky Shore, SUBCLASS Rubble, WATER REGIME Irregularly Flooded, WATER CHEMISTRY Euhaline, SPECIAL MODIFIER Artificial. Classification of lower (darker) zone: SYSTEM Estuarine, SUBSYSTEM Intertidal, CLASS Aquatic Bed, SUBCLASS Algal, DOMINANCE TYPE Fucus vesiculosus, WATER REGIME: Regularly Flooded, WATER CHEMISTRY Euhaline, SPECIAL MODIFIER Artificial. (Washington County, Rhode Island; July 1977; Photo by F. C. Golet) |