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{{Redirect|Swampland|the scientific concept|Swampland (physics)}} |
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{{About|the [[landform]]|other uses|Swamp (disambiguation)}} |
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[[File:Florida freshwater swamp usgov image.jpg|thumb|A freshwater swamp in [[Florida]]]] |
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[[File:Belarus-Peat Mining near Rudzensk-Swamp-2.jpg|thumb|Belarus]] |
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A '''swamp''' is a [[wetland]] that is forested.<ref name="Keddy, P.A 2010">Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p.</ref> Many swamps occur along large rivers where they are critically dependent upon natural water level fluctuations.<ref name="Hughes, F.M.R. 2003">Hughes, F.M.R. (ed.). 2003. The Flooded Forest: Guidance for policy makers and river managers in Europe on the restoration of floodplain forests. FLOBAR2, Department of Geography, University of Cambridge, Cambridge, UK. 96 p.</ref> Other swamps occur on the shores of large lakes.<ref>Wilcox, D.A, Thompson, T.A., Booth, R.K. and Nicholas, J.R. 2007. Lake-level variability and water availability in the Great Lakes. USGS Circular 1311. 25 p.</ref> Some swamps have [[hammock (ecology)|hammocks]], or dry-land protrusions, covered by [[aquatic vegetation]], or vegetation that tolerates periodic inundation.<ref>[http://www.nwrc.usgs.gov/fringe/glossary.html Swamp] (from glossary web page of the [[United States Geological Survey]])</ref> The two main types of swamp are "true" or [[Freshwater swamp forest|swamp forest]]s and "transitional" or [[shrub swamp]]s. In the boreal regions of Canada, the word swamp is colloquially used for what is more correctly termed a [[bog]] or [[muskeg]]. The water of a swamp may be [[fresh water]], [[brackish water]] or [[seawater]]. Some of the world's largest swamps are found along major rivers such as the Amazon, the Mississippi, and the Congo.<ref>Keddy, P.A., L.H. Fraser, A.I. Solomeshch, W.J. Junk, D.R. Campbell, M.T.K. Arroyo and C.J.R. Alho. 2009. Wet and wonderful: the world’s largest wetlands are conservation priorities. BioScience 59: 39-51.</ref> |
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Conservationists have worked hard to preserve swamps. For example, the swamps in Northwest Indiana have been preserved as part of the Indiana Dunes.<ref>Smith, S. & Mark, S. (2006). Alice Gray, Dorothy Buell, and Naomi Svihla: Preservationists of Ogden Dunes. The South Shore Journal, 1. |
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http://www.southshorejournal.org/index.php/issues/volume-1-2006/78-journals/vol-1-2006/117-alice-gray-dorothy-buell-and-naomi-svihla-preservationists-of-ogden-dunes |
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</ref><ref>Smith, S. & Mark, S. (2009). The Historical Roots of the Nature Conservancy in the Northwest Indiana/Chicagoland Region: From Science to Preservation. The South Shore Journal, 3. http://www.southshorejournal.org/index.php/issues/volume-3-2009/83-journals/vol-3-2009/75-the-historical-roots-of-the-nature-conservancy-in-the-northwest-indianachicagoland-region-from-science-to-preservation</ref><ref>Smith, S. & Mark, S. (2007). The cultural impact of a museum in a small community: The Hour Glass of Ogden Dunes. The South Shore Journal, 2. http://www.southshorejournal.org/index.php/issues/volume-2-2007/82-journals/vol-2-2007/104-the-cultural-impact-of-a-museum-in-a-small-community-the-hour-glass-in-ogden-dunes</ref> |
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== Geology == |
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Swamps are characterized by very slow-moving waters. They are usually associated with adjacent [[river]]s or [[lake]]s. In some cases, rivers become swamps for a distance.{{citation needed|date=June 2012}} Swamps are features of areas with very low [[topographic]] relief. |
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== Draining == |
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Swamps were historically drained to provide additional land for [[agriculture]] and to reduce the threat of diseases borne by swamp insects and similar animals{{clarify|date=November 2013}}<!--diseases borne by...similar animals??-->.<ref name="Dugan, P. 2005">Dugan, P. (ed.) 2005. Guide to Wetlands. Buffalo, New York. Firefly Books. 304 p.</ref> Many swamps were also heavily logged, requiring construction of drainage ditches and canals. These ditches and canals contributed to drainage and, along the coast, allowed salt water to intrude, converting swamps to marsh or even open water.<ref name="Keddy, P.A 2010"/> Large areas of swamp were therefore lost or degraded. Louisiana provides a classic example of wetland loss from these combined factors.<ref>Keddy, P.A., D. Campbell, T. McFalls, G. Shaffer, R. Moreau, C. Dranguet, and R. Heleniak. 2007. The wetlands of lakes Pontchartrain and Maurepas: past, present and future. Environmental Reviews 15: 1- 35.</ref> Europe has probably lost nearly half its wetlands.<ref name="Dugan, P. 2005"/> As another example, New Zealand has lost 90 percent of its wetlands over the past 150 years.<ref>Peters, M. and Clarkson, B. 2010. Wetland Restoration: A Handbook for New Zealand Freshwater Systems. Manaaki Whenua Press, Lincoln, N.Z. ISBN 978-0-478-34707-4 (online)</ref> It is now understood that swamps provide valuable ecological services including flood control, fish production, water purification, carbon storage, and wildlife habitat.<ref>Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p. Chapter 11.</ref> In many parts of the world, swamps are protected. In parts of Europe and North America, swamp restoration projects are becoming widespread.<ref name="Hughes, F.M.R. 2003"/><ref>Environment Canada. 2004. How Much Habitat is Enough? A Framework for Guiding Habitat Rehabilitation in Great Lakes Areas of Concern. 2nd ed. 81 p.</ref> Often the simplest steps to restoring swamps are to plug drainage ditches and remove levees.<ref>Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p. Chapter 13.</ref> |
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== Land value and productivity == |
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Swamps and other [[wetlands]] have traditionally held a very low [[property value]] compared to fields, [[prairie]]s, or [[woodland]]s. They have a reputation for being unproductive land that cannot easily be utilized for human activities, other than perhaps [[hunting]] and [[animal trapping|trapping]]. Farmers, for example, typically drained swamps next to their fields so as to gain more land usable for planting crops. |
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Many societies now realize that swamps are critically important to providing [[fresh water]] and [[oxygen]] to all life, and that they are often breeding grounds for a wide variety of life. Indeed, floodplain swamps are extremely important in fish production.<ref>Lowe-McConnell, R. H. (1975). Fish Communities in Tropical Fresh waters: Their Distribution, Ecology and Evolution. London: Long man</ref> Government environmental agencies (such as the [[United States Environmental Protection Agency]]) are taking steps to protect and preserve swamps and other wetlands. In Europe, major effort is being invested in the restoration of swamp forests along rivers.<ref name="Hughes, F.M.R. 2003"/> |
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== Notable examples == |
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Swamps can be found on all continents except [[Antarctica]].<ref name=Hunter>{{cite book|last=Hunter|first=Malcolm L.|title=Maintaining Biodiversity in Forest Ecosystems|year=1999|publisher=Cambridge University Press|isbn=978-0521637688|page=325}}</ref> |
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The largest swamp in the world is the Amazon River floodplain, which is particularly significant for its large number of fish and tree species.<ref>Goulding, M. (1980). The Fishes and the Forest: Explorations in Amazonian Natural History. Berkeley, CA: University of California Press.</ref><ref>Lowe-McConnell, R. H. (1975). Fish Communities in Tropical Freshwaters: Their Distribution, Ecology and Evolution. London: Longman</ref><ref name="P.A. Keddy 2005">L.H. Fraser and P.A. Keddy (eds.). 2005. The World’s Largest Wetlands: Ecology and Conservation. Cambridge University Press, Cambridge, UK. 488 p.</ref> |
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=== Africa === |
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The [[Sudd]] and the [[Okavango Delta]] are Africa's best known marshland areas. |
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=== Asia === |
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The [[Tigris-Euphrates river system]] is a large swamp and river system in southern [[Iraq]], traditionally inhabited in part by the [[Marsh Arabs]]. |
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In Asia, tropical peat swamps are located in mainland East Asia and Southeast Asia. In Southeast Asia, peatlands are mainly found in low altitude coastal and sub-coastal areas and extend inland for distance more than {{convert|100|km|mi|abbr=on}} along river valleys and across watersheds. They are mostly to be found on the coasts of East Sumatra, Kalimantan (Central, East,South and West Kalimantan provinces), West Papua, Papua New Guinea, Brunei,Peninsular Malaya, Sabah, Sarawak, Southeast Thailand, and the Philippines (Riley ''et al.'',1996). Indonesia has the largest area of tropical peatland. Of the total {{convert|440000|sqkm|sqmi|abbr=on}} tropical peat swamp, about {{convert|210000|sqkm|sqmi|abbr=on}} are located in Indonesia (Page, 2001; Wahyunto, 2006). |
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=== Europe === |
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The [[Vasyugan Swamp]] is a large swamp in the western [[Siberia]] area of the [[Russian Federation]]. This is one of the largest swamps in the world, covering an area larger than [[Switzerland]]. The [[Pinsk Marshes|Pripyat Swamps]] in Belarus and Ukraine divided the central and southern theatres of operation during [[World War II]], and served as a hideout for [[Soviet partisans|Soviet]] and [[Home Army|Polish partisans]]. In the summer of 1941, the SS Cavalry Brigade commanded by [[Hermann Fegelein]] during the course of "anti-partisan" [[Pripyat swamps (punitive operation)|operations]] in the Pripyat Swamps killed nearly 18,000 people. |
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=== North America === |
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[[File:Cypresses.jpg|thumb|right|Swamp in southern Louisiana]] |
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[[Atchafalaya Basin|Atchafalaya Swamp]] at the lower end of the Mississippi River is the largest swamp in the [[United States]]. It is an important example of southern cypress swamp<ref>Conner, W. H. and Buford, M. A. (1998). Southern deepwater swamps. In Southern Forested Wetlands: Ecology and Management, eds. M. G. Messina and W. H. Conner, pp. 261–87. Boca Raton, FL: Lewis Publishers.</ref> but it has been greatly altered by logging, drainage and levee construction.<ref>Reuss, M. (1998). Designing the Bayous: The Control of Water in the Atchafalaya Basin 1800–1995. Alexandria, VA: U.S. Army Corps of Engineers Office of History.</ref> Other famous swamps in the United States are the forested portions of the [[Everglades]], [[Okefenokee Swamp]], [[Barley Barber Swamp]], [[Great Cypress Swamp]] and the [[Great Dismal Swamp]]. The Okefenokee is located in extreme southeastern [[Georgia (U.S. state)|Georgia]] and extends slightly into northeastern [[Florida]]. The [[Great Cypress Swamp]] is mostly in [[Delaware]] but extends into [[Maryland]] on the [[Delmarva Peninsula]]. [[Point Lookout State Park]] on the southern tip of Maryland contains a large amount of swamps and marshes. The [[Great Dismal Swamp]] lies in extreme southeastern [[Virginia]] and extreme northeastern [[North Carolina]]. Both are [[National Wildlife Refuge]]s. Another swamp area, [[Reelfoot Lake]] of extreme western [[Tennessee]] and [[Kentucky]], was created by the [[New Madrid fault zone|New Madrid earthquake]] of 1812. [[Caddo Lake]], the Great Dismal and Reelfoot are swamps that are centered at large lakes. Swamps are often called ''[[bayou]]s'' in the [[southeastern United States]], especially in the [[Gulf of Mexico|Gulf Coast]] region. |
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=== List of major swamps === |
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[[File:Saltpancrk12.jpg|thumb|right|320px|A small swamp in the [[Padstow, New South Wales]].]] |
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[[File:Saltpancrk1a.jpg|thumb|right|320px|Inside the [[Mangrove]] canopy, [[Salt Pan Creek]], [[New South Wales]]]] |
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The world's largest wetlands include significant areas of swamp, such as in the Amazon and Congo River basins.<ref name="P.A. Keddy 2005"/> Further north, however, the largest wetlands are [[bog]]s. |
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=== Africa === |
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* [[Lake Bangweulu|Bangweulu Swamps]], [[Zambia]] |
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* [[Okavango Swamp]], [[Botswana]] |
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* [[Sudd]], [[Sudan]] |
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* [[Niger Delta]], [[Nigeria]] |
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* [[Mare aux Songes]], [[Mauritius]] |
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=== Asia === |
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[[Image:Vasyugan Swamp.jpg|thumb|250px|[[Vasyugan Swamp]] in western [[Siberia]]]] |
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* [[Asmat Swamp]], [[Indonesia]] |
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* Candaba Swamp in [[Apalit, Pampanga|Apalit]] and [[Candaba, Pampanga|Candaba]], [[Pampanga]] and [[Pulilan, Bulacan]], Philippines |
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* Mangrove Swamp in [[Karachi]], [[Pakistan]] |
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* [[Myristica Swamps]] in [[Western Ghats]], [[India]] |
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* [[Sundarbans]] in [[India]] and [[Bangladesh]] |
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=== Europe === |
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* [[Pinsk Marshes|Pripyat Swamps]], [[Belarus]] |
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* [[Vasyugan Swamp]], [[Russia]] |
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=== North America === |
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* [[Atchafalaya National Wildlife Refuge]], Louisiana, United States |
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* [[Big Cypress National Preserve]], Florida, United States |
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* [[Barley Barber Swamp]], Florida, United States |
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* [[Everglades]], Florida, United States |
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* [[Great Black Swamp]], Indiana/Ohio, United States |
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* [[Great Cypress Swamp]], Maryland, United States, also known as Great Pocomoke Swamp |
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* [[Great Dismal Swamp]], North Carolina/Virginia, United States |
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* [[Great Swamp National Wildlife Refuge]], New Jersey, United States |
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* [[Green Swamp (Florida)|Green Swamp]], Florida, United States |
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* [[Green Swamp (North Carolina)|Green Swamp]], North Carolina, United States |
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* [[Honey Island Swamp]], Louisiana, United States |
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* [[Hudson Bay Lowlands]], Ontario, Canada |
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* [[Limberlost]], Indiana, United States |
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* [[Louisiana swamplands]], Louisiana, United States |
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* [[Mingo National Wildlife Refuge]], Puxico, Missouri, United States |
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* [[Okefenokee Swamp]], Georgia/Florida, United States |
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* [[Point Lookout State Park|Point Lookout's Swamps]] |
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* [[Reelfoot Lake]], Tennessee/Kentucky, United States |
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* [[Congaree National Park|Congaree Swamp]], South Carolina, United States |
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=== South America === |
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* [[Lahuen Ñadi]], [[Chile]] |
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* [[Pantanal]], [[Brazil]] |
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* [[Paraná Delta]], [[Argentina]] |
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* [[Esteros del Iberá]], [[Argentina]] |
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== See also == |
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<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"> |
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* [[Aquatic plant]] |
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* [[Bog]] |
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* [[Coniferous swamp]] |
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* [[Fen]] |
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* [[Freshwater swamp forest]] |
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* [[Hydrogen sulfide]] |
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* [[Marsh]] |
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* [[Marsh gas]] |
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* [[Muck (soil)|Muck]] |
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* [[Peat]] |
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* [[Peat swamp forest]] |
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* [[Salt marsh]] |
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* [[Shrub swamp]] |
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* [[Wetland]] |
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* [[Will o' the wisp]] |
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* [[Slough (hydrology)]] |
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</div> |
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==References== |
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{{Reflist}} |
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==External links== |
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{{Commons category|Swamps}} |
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*{{Cite NIE|Swamp|year=1905}} |
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{{Wetlands}} |
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[[Category:Swamps| ]] |
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[[Category:Flooded grasslands and savannas]] |
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[[Category:Terrestrial ecoregions]] |
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[[Category:Fluvial landforms]] |
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[[Category:Pedology]] |
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[[Category:Wetlands]] |
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[[Category:Forest ecology]] |
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{{Link GA|fi}} |
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[[fi:Suo]] |
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