What ecological service is provided by healthy wetlands regarding water quality?

Healthy wetlands play a crucial role in maintaining and improving water quality through their natural water filtration capabilities. They function as biological filters, absorbing and breaking down pollutants such as nutrients, sediments, and contaminants before they enter larger bodies of water. The complex root systems of wetland plants, along with microbial activity in the soil, effectively trap these harmful substances, preventing them from causing ecological harm downstream. This filtration process not only enhances the clarity and cleanliness of water but also supports aquatic life by providing a healthier habitat. Healthy wetlands, therefore, are vital ecological assets for ensuring clean water in surrounding ecosystems.