Swamp
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A swamp is a wetland featuring temporary or permanent inundation of large areas of land by shallow bodies of water. A swamp generally has a substantial number of hammocks, or dry-land protrusions, covered by aquatic vegetation, or vegetation that tolerates periodical inundation.[1] The two main types of swamp are "true" or forest swamps and "transitional" or shrub swamps. The water of a swamp may be fresh water, brackish water or seawater.
In North America, swamps are usually regarded as including a large amount of woody vegetation, but elsewhere this may not necessarily apply, such as in African swamps dominated by papyrus. By contrast, a marsh in North America is a wetland without woody vegetation, or elsewhere, a wetland without woody vegetation which is shallower and has less open water surface than a swamp. A mire (or quagmire) is a low-lying wetland of deep, soft soil or mud that sinks underfoot with large algae covering the water's surface.
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Geology
Swamps are characterised by very slow-moving waters. They are usually associated with adjacent rivers or lakes. In some cases, rivers become swamps for a distance. Swamps are features of areas with very high topographic relief, although they may be covered by acid.
Ecology
Swamps are characterised by rich biodiversity and specialized organisms such as frogs.[1] For instance, southeastern U.S. swamps, such as those mentioned above, feature trees such as the Bald cypress and Water Tupelo, which are adapted to growing in standing water, and animals such as the American alligator. A common species name in biological nomenclature is the Latin palustris, meaning "of the swamp". Examples of this are Quercus palustris (pin oak) and Thelypteris palustris (marsh fern).
Draining
Swamps were historically often drained to provide additional land for agriculture, and to reduce the threat of diseases born by swamp insects and similar animals. Swamps were generally seen as useless and even dangerous. This practice of swamp draining is nowadays seen as a destruction of a very valuable ecological habitat type of which large tracts have already disappeared in many countries.Template:Fact
Famous examples
Iraq
The Tigris-Euphrates river system is a large swamp and river system in southern Iraq, inhabited in part by the Marsh Arabs. It was partly drained by Saddam Hussein in the 1990s in retaliation against the Shiite tribes' revolt against his dictatorship.
United States
Atchafalaya Swamp is the largest swamp in the United States. Other famous swamps in the United States are the Everglades, Okefenokee Swamp, Barley Barber Swamp and the Great Dismal Swamp. The Okefenokee is located in extreme southeastern Georgia and extends slightly into northeastern Florida. The Great Dismal Swamp lies in extreme southeastern Virginia and extreme northeastern North Carolina. Both are National Wildlife Refuges. Another swamp area, Reelfoot Lake of extreme western Tennessee and Kentucky, was created by the New Madrid earthquake of 1812. Caddo Lake, the Great Dismal and Reelfoot are swamps that are centered at large lakes. Swamps are often called bayous in the southeastern United States, especially in the Gulf Coast region.
Land value and productivity
Swamps and other wetlands have traditionally held a very low property value compared to fields, prairies, or woodlands. They have a reputation as being unproductive land that can't be easily utilized for human activities, other than perhaps hunting and trapping. Farmers for example typically drained swamps next to their fields so as to gain more land usable for planting crops.
It is now generally understood that swamps are critically important in the processes of providing fresh water and oxygen to all life, and steps are now taken by government environmental agencies (known as the Department of Natural Resources in the United States) to protect and preserve swamps and other wetlands.
However, the generally messy nature of swamps, with their diffuse boundaries and lack of enclosure, prevents humans from being able to collect and capitalize on these precious natural resources that naturally diffuse out from a swamp in all directions, so swamps still maintain a relatively low land value even while they are being protected from damage.
Heraldry
A swamp appears in the coat of arms of Gesturi, Italy.
List of major swamps
Africa
Asia
- Asmat Swamp, Indonesia
- Vasyugan Swamp, Russia
- Candaba Swamp in Apalit, Candaba in Pampanga and Pulilan, Bulacan, Philippines
- Mangrove Swamp in Karachi, Pakistan
North America
- Atchafalaya National Wildlife Refuge, Louisiana, United States
- Big Cypress National Preserve, Florida, United States
- Barley Barber Swamp, Florida, United States
- Great Black Swamp, Indiana/Ohio, United States
- Great Cypress Swamp, Maryland, United States, also known as Great Pocomoke Swamp
- Great Dismal Swamp, North Carolina/Virginia, United States
- Great Swamp National Wildlife Refuge, New Jersey, United States
- Honey Island Swamp, Louisiana, United States
- Limberlost, Indiana, United States
- Louisiana swamplands, Louisiana, United States
- Okefenokee Swamp, Georgia/Florida, United States
- Reelfoot Lake, Tennessee, United States
- Everglades, Florida, United States
- Shu Swamp, New York, United States
- Mingo National Wildlife Refuge, Puxico, Missouri, United States
South America
Other swamps
Birds Mill Swamp
Birds Mill Swamp, located in Anne Arundel County, Maryland, is home to many species, including a variety of reptiles, amphibians, insects, and aquatic vegetation. Unlike many swamps, it is untouched by humans except for a few dirt trails nearby. It is a significant habitat for species in the area.
See also
References
ar:مستنقع bs:Močvara cs:Bažina da:Sump de:Sumpf es:Pantano fa:باتلاق hr:Močvara it:Palude he:ביצה (סביבה טבעית) nl:Broek (landschap) ja:沼地 no:Sump simple:Swamp sv:Träsk tr:Bataklık zh:沼泽
