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Virgin Islands National Park Mangroves Mary Creek
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Virgin Islands National Park
Mangroves
Mangroves Mary Creek

Mangroves are flowering trees that live in saltwater or brackish water in mudflats near shorelines. Red Mangroves (Rhizophora mangle) are the most distinctive, with their complex ariel prop roots. These root systems, when submerged, support a diverse community of sponges, ascidians, algae, corals and crabs. They provide crucial habitat for juvenile reef and pelagic fish as well as lobsters. The roots also trap sediment and associated pollutants to improve offshore water quality and slowly build more land. The trees also provide roosts, nesting habitat, and feeding areas for many bird species.

White and black mangroves (Laguncularia racemosa and Avicennia germinans) grow in the sand soil and sediment upland from the red mangroves. They are often found in salt ponds.

Visitors can find good examples of mangroves in Hurricane Hole and Mary Creek.  

 

 
Discovering the Secret Gardens in the Mangroves of St. John, U.S. Virgin Islands

Dr. Caroline Rogers

Mangrove Prop-roots

Discovering the Secret Gardens in the Mangroves of St. John, U.S. Virgin Islands

The mangroves in Hurricane Hole host a unique array of corals.  Click on the picture to read about the new discoveries and investigations of this remarkably diverse ecosystem.

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Wasps, locally called Jack Spaniard in their nest.

Did You Know?
A wasp common to St. John is called the Jack Spaniard. These paper wasps are not aggressive, but will sting you repeatedly if disturbed. The sting can be quite painful, and should be treated with common sting relief remedies. The discomfort can last three days.

Last Updated: May 19, 2010 at 15:08 MST