Mudflat

Mudflats in Brewster, Massachusetts extending hundreds of yards offshore at the low tide. The line of seashells in the foreground indicates the high water mark

Mudflats are coastal wetlands that form when mud is deposited by the tides or rivers, they are found in sheltered areas such as bays, bayous, lagoons, and estuaries. Mudflats may be viewed geologically as exposed layers of bay mud, resulting from deposition of estuarine silts, clays and marine animal detritus. Mudflats are typically important regions for wildlife, supporting a large population, although levels of biodiversity are not particularly high. They are often of particular importance to migratory birds.

The maintenance of mudflats are important in preventing coastal erosion. However, mudflats worldwide are under threat from predicted sea level rises, land claims for development, dredging due to shipping purposes, and chemical pollution.

Major world mudflats

• Wadden Sea - Netherlands, Germany, Denmark
• Bridgwater Bay & Morecambe Bay - United Kingdom
• Chongming Dongtan Nature Reserve, Shanghai, China.
• Banc d'Arguin, Mauritania
• Lindesfarne, England
• San Francisco Bay, United States
• Cape Cod Bay, United States

Trivia

Humphrey the whale, who may have been the most famous cetacean in history, was rescued from a beached condition on a mudflat, immediately north of the Dakin building at Sierra Point in San Francisco Bay.

See also

• wetland
• Coastal wetland
• Intertidal zone