Two intertidal organisms that are known to be ecologically important in providing habitat structure and in increasing species diversity benefit from features on the habitat test panels: the algae Fucus distichus, and mussels. These organisms responded to different features of test panels.
Invertebrates that are important in juvenile salmon diets also benefited from the experimental habitats. Stepped and finned panels had higher densities of the types of harpacticoid copepods and insect larvae that juvenile salmon consume, as compared to other panel types and reference/control conditions.
These findings suggest that angled surfaces are important components of future seawall design as well as crevices that provide more complex surface texture: both of these components benefit ecologically important species that create more biotic habitat structure, increase species diversity, and provide foraging opportunities for juvenile salmon along Seattle’s seawall.