The floating islands create diverse habitats for birds and insects and can be hotspots of local biodiversity. The dense underwater root network provides a refuge and shelter for fish and other aquatic fauna.

Floating wetlands calm currents and thus contribute to coastal protection. They favour sedimentation, which in turn can lead to an increase in water transparency.

The plants islands absorb nutrients such as nitrogen and phosphorus through their roots. In this way, they help to counteract eutrophic waters.

Especially during the flowering season, plants such as beach lilac (Limonium vul-gare), marsh iris (Iris pseudacorus) or blood willow (Lythrum salicaria) can form attractive splashes of colour that increase the aesthetic value of the environment.