![]() There’s life on the beach, but it is tough to live here. These major storms also cause islands to roll over themselves and migrate to the north. Wind, waves, and flooding constantly reshape these islands and frequently damage structures and vegetation. ![]() Extreme weather like hurricanes can profoundly affect barrier islands. Sand usually moves from the east to the west, but sometimes change comes suddenly during fierce storms. Sand is always moving either by wind, currents, or storms. This combination of wind and waves result in the barrier islands moving towards the mainland while also marching steadily westward. While prevailing south easterly winds set up longshore currents that gradually move sand from east to west. Wave action and onshore breezes transfer sand from the south side of the island to the north side of the island. Along the Gulf of Mexico the barrier islands move north and west. Over time barrier islands move, erode, and grow again as ocean currents and wind gradually shape the seashore. Because they buffer the Gulf’s wave action, barrier islands also protect salt marshes and seagrass beds, which are nurseries for valuable marine species.Ĭhange is constant on these islands. Waves expend their energy as they break on the islands’ beaches. The name “barrier” describes how these islands protect natural and human communities against ocean storms. These dynamic bars of sand parallel to the mainland are treasures at the edge of the Gulf of Mexico. Gulf Islands National Seashore protects seven barrier islands. ![]() Barrier Islands provide protection for wildlife, plants, and humans. ![]()
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