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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.
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.
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.
It is an ecologically important riverine wetland, rich in plant and animal species such as mugger crocodile, hump-backed mahseer, painted stork, spot-billed pelican and black-headed ibis. 59 Vembannur Wetland Complex: Tamil Nadu: 8 April 2022 0.20 Vembannur Wetland Complex is a man-made inland tank which forms the southernmost tip of peninsular ...
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 wetland receives most of its water and nutrients from precipitation (ombrotrophic) rather than surface or groundwater (minerotrophic). The wetland is nutrient-poor (oligotrophic). The wetland is strongly acidic (bogs near coastal areas may be less acidic due to sea spray). Because all bogs have peat, they are a type of peatland.
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 .
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]