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Fucus distichus

Fucus distichus
was more abundant on the sloped stepped and finned surfaces.
The graph on the right shows percent cover of Fucus at each elevation by panel design  (finned, stepped, flat) and by surface treatment (smooth or cobble) at the endpoint of monitoring in August 2009. 


At lower and middle elevations, angled (stepped and finned) treatments had significantly higher F. distichus percent cover based on a 2-way ANOVA (angle x surface treatment). Surface treatment (smooth or cobble) did not have an effect and there was no interaction effect.


It is known from the scientific literature that Fucus distichus increases species richness by forming canopies in the mid to high intertidal that provide structural heterogeneity, shelter, and food for a variety of understory organisms and meiofauna including large numbers of herbivorous gastropods and crustaceansThus, increased abundance of Fucus could be an important addition to the biological community of the seawall in downtown Seattle. 
   


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