

i 



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Figure 27. Drydown in water tupelo (Zone 1 1 ) on Ebenezer Creek (GA). These backwater 

 environments are dominated exclusively by tupelo and cypress. During drydown, nutri- 

 ents concentrate, and duckweeds form dense surface layers. Note: (1) the precise 

 height of the high water line (approximately 2 m or 7 ft), (2) relation of buttress 

 swell to high water mark, and (3) counter-clockwise "swirl" of buttresses. 



Figure 28. The outermost backswamp (Zone II) on many alluvial floodplains is dominated 

 by a swamp tupelo on acid, highly organic muck soils. Here on the Escambia (Hwy. 184 

 bridoe, FL) the shrub zone ( Cyril la , Itea ) is sparse but prominent. There is a clay 

 aquiclude several feet below the surface mucks. Seepage moisture from the adjacent 

 upland, as well as rainfall, may be important to some of these associations. 



51 



