Outdoor seating, a common feature in urban and coastal areas, can significantly impact local amphipod populations—small crustaceans vital to aquatic ecosystems. These creatures thrive in undisturbed habitats, but the introduction of artificial structures like benches, tables, and decks often disrupts their natural environment.

The shading caused by seating arrangements alters light penetration, affecting algae growth, a primary food source for amphipods. Additionally, foot traffic and debris accumulation near seating areas can compact soil or sediment, reducing oxygen levels and degrading habitat quality. Studies suggest that densely placed outdoor seating correlates with lower amphipod diversity, as sensitive species migrate or perish.

However, thoughtful design—such as elevated platforms, permeable materials, and buffer zones—can mitigate these effects. By balancing human convenience with ecological preservation, cities can protect these keystone species while maintaining vibrant public spaces.