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Ecoscenario: Everglades National Park 4/16/03 3:15 PM Hammocks provide habitat for mink, snail kites, raccoons, and the Florida panther. Hammocks rise above the saw-grass prairie or marshland. They are named for the kinds of trees they contain. Art Explosion Art Explosion A view from inside a hardwood hammock The several kinds of hammocks are classified by the kind of trees found there. Hardwood hammocks contain trees with dense wood, like West Indian mahogany, strangler fig, and gumbo-limbo. Cypress heads are hammocks of bald cypress trees. Bald cypress can survive in standing water. Eventually mud, silt, and debris fills in and forms a hammock. Art Explosion Bald cypress are the only conifers that can grow in standing water. Hammocks provide habitat for raccoons and other small mammals. Art Explosion The freshwater swamps and marshes make up 33% of the Everglades. Swamps and marshes become covered with algal mats called periphyton. These algal mats are the primary producers in this ecosystem, and provide oxygen, soil-building material, and an area for birds and other animals to lay eggs. Plants such as St.-John's-wort and bladderwort grow here. Wading birds, such as great blue herons and roseate spoonbills, feed in freshwater marshes, but return to hammocks to nest. file:///Ecoscenario/everglades/content.html Page 9 of 17
Ecoscenario: Everglades National Park 4/16/03 3:15 PM Courtesy of U.S. Geological Survey Courtesy of U.S. Geological Survey Freshwater marsh contains still ponds surrounded by trees. Periphyton algal mat Annual productivity, or the amount of energy provided by the producers in this ecosystem, is 6450 kilocalories/ square meter/year of plant and algal material. This productivity is very high, almost as high as the most productive ecosystem, the rain forest. There are productivity differences between the wet and dry season. Usually, producers are more active during the wet season. ISSUES Fresh water is vital to all living organisms. Water use and quality are the primary issues concerning Everglades National Park and the people that live in Florida. Water diversion for agricultural and urban development, especially in the last 50 years, has reduced the Everglades ecosystem to less than half its original size. file:///Ecoscenario/everglades/content.html Page 10 of 17
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Ecoscenarios Combined - FOSSweb

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