Why do estuaries support such an abundance?

Estuaries support such an abundance of life because they provide a unique mix of nutrients from freshwater and saltwater sources, creating a rich and diverse ecosystem. The sheltered nature of estuaries also creates habitats that are ideal for many species to breed, feed, and seek protection from predators. Additionally, estuaries act as nurseries for juvenile fish and other organisms, contributing to the high levels of biodiversity found in these ecosystems.