Wetlands are some of the most valuable and diverse ecosystems on Earth; they are the link between land and water. An immense variety of species like microbes, plants, insects, amphibians, reptiles, birds, fish and other wild life in some way depend on wetlands. Wetlands act like giant sponges during heavy rains, where they absorb excess water, limiting the effects of flooding. Wetland plants play an integral role in the ecology of the watershed. They provide breeding and nursery sites, resting areas for migratory species, and refuge from predators. Decomposed plant matter (detritus) released into the water is an important food source for many invertebrates and fish both in the wetland and in associated aquatic systems.