The justification for using mangroves for wildlife management is hindered by the fact that few animals are restricted to this environment. Some animals have retreated to this environment to avoid human disturbance and predation, such as the Key Deer in Florida. The tree roots are used as nursery grounds for aquatic species including crayfish, shrimps and clams. The protective role of the plant is extended to coral reefs because root systems reduce the amount of sediment and nutrients entering the sea. This action serves to extend the land and reduce mortality of coral reefs from sedimentation and eutrophication.
Sediment loading can directly smother corals and inhibit photosynthesis.
Indirectly the sediment can bring soil microbacteria such as Aspergillus, which may result in coral mortality. Nutrients originating from the land can facilitate the growth of algae, which further smother corals, reduce photosynthesis and lead to the death of the zooplankton. In addition, mangal forests are important for primary production.