Nature Gulf Islands National Seashore Mississippi District

Islands

 

"Such a sky -- such water, and Horn Island between with me walking -- the back of Moby Dick, the white whale, the magic carpet, surrounded by inhabited space...".
Horn Island Logs, Walter Anderson, Gulf Coast Artist

ISLAND FORMATION
Few people realize barrier islands are creations not just of the sea, but also of the land. Islands on the northern gulf coast are made of quartz sand eroded and washed down rivers from the eastern U.S. mountain ranges. In a sense, a sand dune you may stand on today was once, thousands of years ago, the top of a rugged southern Appalachian mountain.

Once swept into the open sea, strong currents push sand grains westward along the coast. Currents and waves eventually build a ridge of sediment on shallow ocean floors to create islands. Sand continues to deposit over time building the islands higher. With the right conditions, wind blown seeds germinate, and vegetation takes root. Seeds may also be carried by migrating birds.

In time, animals find food, water, and shelter for their homes. Inland ponds and salt marshes become nurseries when young shrimp and crabs are swept in by tides. Insects find refuge from stormy winds. Birds swoop down during migration and decide to stay for awhile.

Mammals, refugees from some mainland flood, wash ashore after grasping and floating aboard downed trees and debris. A delicate balance of life, despite hurricanes and dozens of other threats, comes together on a gulf coast barrier island.

ISLANDS ARE ALWAYS CHANGING
Life is never static on a barrier island. What is here today may be gone tomorrow. Natural forces build and erode shorelines in a subtle, never-ending combination process combining the effects of winds, waves, currents and tides. Sometimes, nature creates awesome effects in fits of raw power. About 150 years ago, hurricane winds cleaved Petit Bois from Dauphin Island, Alabama. This newborn island has since migrated eight miles westward into Mississippi waters.

Between Mexico and Canada, 350 fragile islands once provided homes to hardy groups of plants and animals. In time, people also built homes on these same islands. Today on many islands we find sea ports, refineries, villages and even major cities populated by millions of people. Few islands now offer the unique form of wilderness found on Horn, Petit Bois and Ship Islands.

IMPORTANCE OF BARRIER ISLANDS
Running parallel to the coast, these long, narrow islands protect natural and human communities from ocean storms. Many marine creatures find shelter in extensive marsh lands along the coast. Protected by islands, these salt marsh nurseries add millions of dollars to the economy through commercial and sport fishing opportunities. Commercial and sport craft seek shelter behind the islands for safe passage between ports. Though low and sparsely populated, Gulf coast barrier islands are important for humans and nature.

Of all the barrier islands between Maine and Mexico; Horn, Petit Bois and East Ship are some of the last still in a natural state. Their beaches, lagoons and maritime forests offer a rare solitude not far from a rapidly developing Gulf coast.

Perhaps more powerful than forces of nature, human impact can threaten the existence of barrier islands. Thousands of visitors come yearly to these islands and surrounding waters. Uncrowded beaches, quiet forests and few signs of civilization provide a getaway from office schedules, telephones and traffic.

Unfortunately, oil spills, marine debris, sea grass destruction, trashy camping practices and poor manners degrade recreational opportunities. Thoughtful campers and boaters can help preserve these islands for their next visit and the visits of future generations.

ISLAND HABITATS
An amazing variety of plants and animals exists in a world of heat, cold, drought and deluge. Behind sandy beaches are patchworks of dunes, lagoons, salt marshes and pine forest. Inches in elevation reveal entirely new plant communities.

Life is nowhere more abundant than where land meets sea. Buried beneath sandy beaches are ghost crabs, sea worms and sand fleas. Offshore, waters teem with squid, silversides, shrimp, jellyfish, horseshoe crabs, mullet, and more.

Reptiles are common. Alligators bask in the morning sun alongside lagoons and ponds. Lizards, snakes, turtles and frogs crawl or slither among dunes, marsh and forest floor. Huge, rare sea turtles crawl ashore to lay eggs in nest cavities they dig in the sand.

Most mammals can not swim the Mississippi Sound, but look for signs of raccoons, rats, mice, rabbits, and nutria. Some washed ashore on floating storm debris. Others were introduced by humans.

Bald eagles can be seen on the barrier islands.The most easily seen species are birds. Over 260 species, including skimmers, plovers and terns, find the islands ideal for nesting or migratory rest stops. Sanderlings feed during an 8,000 mile trip between the Arctic and South America. Osprey, pelicans and bald eagles are seen flying here. Decades ago, fish-eating birds were devastated by the pesticide DDT. Banning it and other related pesticides, plus time and habitat preservation, such as protecting these islands, aided in their return.

Conditions are harsh. Island animals have to cope with relentless summer heat and sun, and unpredictable weather extremes including hurricanes. But these island inhabitants are well adapted to natural conditions and thrive in an amazing variety. The greatest threats to island animals are not harsh natural conditions but human caused impacts, such as air and water pollution, habitat destruction and fragmentation, and introduction of non-native species.

HUMANS ON THE ISLANDS
For centuries, Horn and Ship Islands served as havens for human migration. Arrowheads suggest Native Americans visited first. Sixteenth century Europeans sailed offshore exploring the New World. As Spanish gold fleets sailed to Cuba, pirates may have struck from island bases against these slow moving, floating treasure troves.

The first recorded use of the water offshore Ship Island for a deep water harbor was in 1699, when a French-Canadian fleet dropped anchor. The fleet's choice of anchorage was perhaps influenced by the 30 known pirates among the vessels' crews.

Using his new island base, French-Canadian Pierre le Moyne d'Iberville claimed for France what became known as Louisiana. His Louisiana extended from Ship Island to Canada. Ship Island figured prominently through two centuries of French, Spanish, and British colonization followed by American nation-building.

In 1845, the Waters family moved to Horn Island. There for 75 years, livestock and crops were raised. Offshore, "Biloxi Schooners" anchored behind protective islands when not shrimping, oystering or hauling cargo. The U.S. Army took over Horn and Ship Islands during World War II, but little evidence of Army activities remains.

In 1971, Congress set aside Horn, Petit Bois and Ship Islands within the boundaries of Gulf Islands National Seashore. In 2000 Congress enlarged the Seashore's boundary by 2000 acres to include portions of Cat Island. Their historic significance, recreational importance and unique ecological niche make the islands worthy of preservation, unimpaired for the enjoyment of future generations.

West Ship Island is one of the barrier islands within the boundaiers of Gulf Islands National Seashore.WILDERNESS STATUS
In 1978, Congress designated Horn and Petit Bois Islands as wilderness areas, protecting two of the last undisturbed barrier islands along the Atlantic Ocean and Gulf of Mexico.

WHAT IS WILDERNESS?
The Wilderness Act provides that designates wilderness areas must have primeval character without permanent habitation or improvements, be primarily influenced by the forces of nature, have outstanding opportunities for unconfined types of recreation, and contain features of scenic, ecological, scientific, educational, or historical value.

WILDERNESS ETHICS
In wilderness, people are intruders. We are welcome if we respect our surroundings.

Avoid walking on vegetation; it holds the fragile dunes together.

Camp and explore away from bird nesting areas. Human presence can frighten adult birds, causing eggs or young to scald under the hot, summer sun. Entering a nesting area allows predators to follow human scent to a free meal of eggs or young birds. Young or eggs of ground nesting birds may be camouflaged to resemble the surrounding environment; you can easily step on them.

Carry your trash and garbage back to the mainland for proper disposal. Fish, birds, sea turtles and mammals can be entangled in monofilament fishing line. Plastic bags floating in the water resemble jellyfish; sea turtles mistakenly eat them causing death.

Remember it is illegal to leave a campfire unattended.

Camping and Boating Information

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Last Updated: 1/6/03
Webmaster Gulf Islands

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