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Wetlands exist on every continent, except Antarctica. [3] The water in wetlands is either freshwater, brackish or saltwater. [2] The main types of wetland are defined based on the dominant plants and the source of the water. For example, marshes are wetlands dominated by emergent herbaceous vegetation such as reeds, cattails and sedges.
The Wetlands Geodatabase and the Wetlands Mapper, as an Internet discovery portal, provide technological tools that allow the integration of large relational databases with spatial information and map-like displays. The information is made available to an array of federal, state, tribal, and local governments and the public.
A wetland (aerial view) Wetland conservation is aimed at protecting and preserving areas of land including marshes, swamps, bogs, and fens that are covered by water seasonally or permanently due to a variety of threats from both natural and anthropogenic hazards. Some examples of these hazards include habitat loss, pollution, and invasive species.
Wetlands exist on every continent, except Antarctica. [19] The water in wetlands is either freshwater, brackish or saltwater. [18] The main types of wetland are defined based on the dominant plants and the source of the water. For example, marshes are wetlands dominated by emergent herbaceous vegetation such as reeds, cattails and sedges.
The convention establishes that "wetlands should be selected for the list on account of their international significance in terms of ecology, botany, zoology, limnology or hydrology." Over the years, the Conference of the Contracting Parties has adopted more specific criteria interpreting the convention text.
Louisiana provides a classic example of wetland loss from these combined factors. [11] Europe has likely lost nearly half its wetlands. [12] New Zealand lost 90 percent of its wetlands over a period of 150 years. [13]
This makes it difficult to delineate the exact extent of a wetland. Second, terms used to describe wetland types vary greatly by region. [1] The term bayou, for example, describes a type of wetland, but its use is generally limited to the southern United States. [9] Third, different languages use different terms to describe types of wetlands.
The wetlands of Louisiana are water-saturated coastal and swamp regions of southern Louisiana, often called "Bayou". The Louisiana coastal zone stretches from the border of Texas to the Mississippi line [ 1 ] and comprises two wetland-dominated ecosystems, the Deltaic Plain of the Mississippi River (unit 1, 2, and 3) and the closely linked ...