Portal:Wetlands

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Wetlands Portal

Introduction

A wetland is a land area that is saturated with water, either permanently or seasonally, such that it takes on the characteristics of a distinct ecosystem. The primary factor that distinguishes wetlands from other land forms or water bodies is the characteristic vegetation of aquatic plants, adapted to the unique hydric soil. Wetlands play a number of roles in the environment, principally water purification, flood control, carbon sink and shoreline stability. Wetlands are also considered the most biologically diverse of all ecosystems, serving as home to a wide range of plant and animal life. Wetlands occur naturally on every continent except Antarctica, the largest including the Amazon River basin, the West Siberian Plain, and the Pantanal in South America. The water found in wetlands can be freshwater, brackish, or saltwater. The main wetland types include swamps, marshes, bogs, and fens; and sub-types include mangrove, carr, pocosin, and varzea.

The UN Millennium Ecosystem Assessment determined that environmental degradation is more prominent within wetland systems than any other ecosystem on Earth. International conservation efforts are being used in conjunction with the development of rapid assessment tools to inform people about wetland issues.

Constructed wetlands can be used to treat municipal and industrial wastewater as well as stormwater runoff and they also play a role in water-sensitive urban design.

Selected article

The primary feature of the Everglades is the sawgrass prairie.
The primary feature of the Everglades is the sawgrass prairie.
The Everglades are a natural region of tropical wetlands in the southern portion of the U.S. state of Florida, comprising the southern half of a large watershed. The system begins near Orlando with the Kissimmee River, which discharges into the vast but shallow Lake Okeechobee. Water leaving the lake in the wet season forms a slow-moving river 60 miles (97 km) wide and over 100 miles (160 km) long, flowing southward across a limestone shelf to Florida Bay at the southern end of the state. The Everglades experience a wide range of weather patterns, from frequent flooding in the wet season to drought in the dry season. Writer Marjory Stoneman Douglas popularized the term "River of Grass" to describe the sawgrass marshes, part of a complex system of interdependent ecosystems that include cypress swamps, the estuarine mangrove forests of the Ten Thousand Islands, tropical hardwood hammocks, pine rockland, and the marine environment of Florida Bay.

Human habitation in the southern portion of the Florida peninsula dates to 15,000 years ago. Before European colonization, the region was dominated by the native Calusa and Tequesta tribes. With Spanish colonization, both tribes declined gradually during the following two centuries. The Seminole formed from mostly Creek people who had been warring to the North; they assimilated other peoples and created a new culture. After being forced from northern Florida into the Everglades during the Seminole Wars of the early 19th century, they were able to resist removal by the United States Army. They adapted to the region. (Full article...)

General images

The following are images from various wetland-related articles on Wikipedia.

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Tidal Salt Marsh at the Rachel Carson National Wildlife Refuge
Tidal Salt Marsh at the Rachel Carson National Wildlife Refuge

Did you know...

that the Sudd swamp is one of the world's largest wetlands?
... that the Sudd swamp is one of the world's largest wetlands?

(Pictured left: Fishing in Sudd wetland.)

Other "Did you know" facts... Read more...

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Pen & Earth
Pen & Earth

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