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65-465: Cheyenne Bottoms is a wetland in the central Great Plains of North America . Occupying approximately 41,000 acres (170 km; 64 sq mi) in central Kansas , it is the largest wetland in the interior United States. The Bottoms is a critical stopping point on the Central Flyway for millions of birds which migrate through the region annually. According to legend, a battle in 1825 between

130-658: A National Wildlife Refuge . Following the Pittman–Robertson Federal Aid in Wildlife Restoration Act of 1937, which taxed sporting arms and ammunition, funds became available to develop the Bottoms. In 1952, after the construction of dikes, roads and hunting blinds, part of the area was opened to public hunting. In 1957, a new canal from the Arkansas River was built. However, relatively little water from

195-711: A sink or a source of carbon, depending on the specific wetland. If they function as a carbon sink, they can help with climate change mitigation . However, wetlands can also be a significant source of methane emissions due to anaerobic decomposition of soaked detritus , and some are also emitters of nitrous oxide . Humans are disturbing and damaging wetlands in many ways, including oil and gas extraction , building infrastructure, overgrazing of livestock , overfishing , alteration of wetlands including dredging and draining, nutrient pollution , and water pollution . Wetlands are more threatened by environmental degradation than any other ecosystem on Earth, according to

260-402: A cliff peters out at the end of a ridge, with mushroom rocks or other types of rock columns remaining. Coastal erosion may lead to the formation of sea cliffs along a receding coastline. The British Ordnance Survey distinguishes between around most cliffs (continuous line along the topper edge with projections down the face) and outcrops (continuous lines along lower edge). Cliff comes from

325-634: A critical habitat for threatened and endangered bird species, Cheyenne Bottoms is one of 29 places in the United States on the List of Ramsar wetlands of international importance . A core 19,857 acres (80.36 km; 31.03 sq mi) parcel belongs to the Kansas Department of Wildlife and Parks (KDWP). The Nature Conservancy owns an adjacent 7,300 acres (29.54 km; 11.41 sq mi). The Kansas State and Nature Conservancy lands are managed with

390-757: A flood. During the 1920s, various plans were put forth to drain the Bottoms and convert it to farmland. However, residents downstream in Hutchinson, Kansas protested that doing so would create flooding problems for them. In 1925, the Kansas Forestry, Fish and Game Commission was created to develop and care for the Bottoms. In August 1927, 14 inches (36 cm) of rain upstream turned it overnight into "Lake Cheyenne" and caused flooding downstream of Little Cheyenne Creek. Kansas politicians including Clifford Hope , Charles Curtis , Henry Allen and Arthur Capper made an unsuccessful plea to get federal money to convert it into

455-402: A frequency and duration to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally included swamps, marshes, bogs, and similar areas.' For each of these definitions and others, regardless of the purpose, hydrology is emphasized (shallow waters, water-logged soils). The soil characteristics and

520-534: A moon of Uranus. The following is an incomplete list of cliffs of the world. Above Sea Above Land Several big granite faces in the Arctic region vie for the title of 'highest vertical drop on Earth', but reliable measurements are not always available. The possible contenders include (measurements are approximate): Mount Thor , Baffin Island , Canada; 1,370 m (4,500 ft) total; top 480 m (1600 ft)

585-1248: A polar climate, wetland temperatures can be as low as −50 °C (−58 °F). Peatlands in arctic and subarctic regions insulate the permafrost , thus delaying or preventing its thawing during summer, as well as inducing its formation. The amount of precipitation a wetland receives varies widely according to its area. Wetlands in Wales , Scotland , and western Ireland typically receive about 1,500 mm (59 in) per year. In some places in Southeast Asia , where heavy rains occur, they can receive up to 10,000 mm (390 in). In some drier regions, wetlands exist where as little as 180 mm (7.1 in) precipitation occurs each year. Temporal variation: Surface flow may occur in some segments, with subsurface flow in other segments. Wetlands vary widely due to local and regional differences in topography , hydrology , vegetation , and other factors, including human involvement. Other important factors include fertility, natural disturbance, competition, herbivory , burial and salinity. When peat accumulates, bogs and fens arise. The most important factor producing wetlands

650-540: A portion of the overall water cycle, which also includes atmospheric water (precipitation) and groundwater . Many wetlands are directly linked to groundwater and they can be a crucial regulator of both the quantity and quality of water found below the ground. Wetlands that have permeable substrates like limestone or occur in areas with highly variable and fluctuating water tables have especially important roles in groundwater replenishment or water recharge. Substrates that are porous allow water to filter down through

715-406: A protective barrier to coastal shoreline. Mangroves stabilize the coastal zone from the interior and will migrate with the shoreline to remain adjacent to the boundary of the water. The main conservation benefit these systems have against storms and storm surges is the ability to reduce the speed and height of waves and floodwaters. Cliff In geography and geology, a cliff or rock face

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780-422: A strong influence on wetland water chemistry, particularly in coastal wetlands and in arid and semiarid regions with large precipitation deficits. Natural salinity is regulated by interactions between ground and surface water, which may be influenced by human activity. Carbon is the major nutrient cycled within wetlands. Most nutrients, such as sulfur , phosphorus , carbon , and nitrogen are found within

845-410: A unique kind of wetland where lush plant growth and slow decay of dead plants (under anoxic conditions) results in organic peat accumulating; bogs, fens, and mires are different names for peatlands. Variations of names for wetland systems: Some wetlands have localized names unique to a region such as the prairie potholes of North America's northern plain, pocosins , Carolina bays and baygalls of

910-452: A wetland is "an ecosystem that arises when inundation by water produces soils dominated by anaerobic and aerobic processes, which, in turn, forces the biota, particularly rooted plants, to adapt to flooding". Sometimes a precise legal definition of a wetland is required. The definition used for regulation by the United States government is: 'The term "wetlands" means those areas that are inundated or saturated by surface or ground water at

975-422: A wetland system includes its plants ( flora ) and animals ( fauna ) and microbes (bacteria, fungi). The most important factor is the wetland's duration of flooding. Other important factors include fertility and salinity of the water or soils. The chemistry of water flowing into wetlands depends on the source of water, the geological material that it flows through and the nutrients discharged from organic matter in

1040-403: A wetland) affects hydro-periods (temporal fluctuations in water levels) by controlling the water balance and water storage within a wetland. Landscape characteristics control wetland hydrology and water chemistry. The O 2 and CO 2 concentrations of water depend upon temperature , atmospheric pressure and mixing with the air (from winds or water flows). Water chemistry within wetlands

1105-558: A whole. To replace these wetland ecosystem services , enormous amounts of money would need to be spent on water purification plants, dams, levees, and other hard infrastructure, and many of the services are impossible to replace. Floodplains and closed-depression wetlands can provide the functions of storage reservoirs and flood protection. The wetland system of floodplains is formed from major rivers downstream from their headwaters . "The floodplains of major rivers act as natural storage reservoirs, enabling excess water to spread out over

1170-577: A wide area, which reduces its depth and speed. Wetlands close to the headwaters of streams and rivers can slow down rainwater runoff and spring snowmelt so that it does not run straight off the land into water courses. This can help prevent sudden, damaging floods downstream." Notable river systems that produce wide floodplains include the Nile River , the Niger river inland delta, the Zambezi River flood plain,

1235-406: Is a cliff or not and also about how much of a certain slope to count as a cliff. For example, given a truly vertical rock wall above a very steep slope, one could count just the rock wall or the combination. Listings of cliffs are thus inherently uncertain. Some of the largest cliffs on Earth are found underwater. For example, an 8,000 m drop over a 4,250 m span can be found at a ridge sitting inside

1300-472: Is a type of cliff formed by the movement of a geologic fault , a landslide, or sometimes by rock slides or falling rocks which change the differential erosion of the rock layers. Most cliffs have some form of scree slope at their base. In arid areas or under high cliffs, they are generally exposed jumbles of fallen rock. In areas of higher moisture, a soil slope may obscure the talus . Many cliffs also feature tributary waterfalls or rock shelters . Sometimes

1365-521: Is about 1.7, corresponding to an angle of 60 degrees, and Mitre Peak is similar. A more vertical drop into the sea can be found at Maujit Qaqarssuasia (also known as the ' Thumbnail ') which is situated in the Torssukátak fjord area at the very tip of South Greenland and drops 1,560 m near-vertically. Considering a truly vertical drop, Mount Thor on Baffin Island in Arctic Canada is often considered

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1430-570: Is an area of rock which has a general angle defined by the vertical, or nearly vertical. Cliffs are formed by the processes of weathering and erosion , with the effect of gravity . Cliffs are common on coasts, in mountainous areas, escarpments and along rivers. Cliffs are usually composed of rock that is resistant to weathering and erosion. The sedimentary rocks that are most likely to form cliffs include sandstone , limestone , chalk , and dolomite . Igneous rocks such as granite and basalt also often form cliffs. An escarpment (or scarp)

1495-440: Is determined by the pH , salinity , nutrients, conductivity , soil composition, hardness , and the sources of water. Water chemistry varies across landscapes and climatic regions. Wetlands are generally minerotrophic (waters contain dissolved materials from soils) with the exception of ombrotrophic bogs that are fed only by water from precipitation. Because bogs receive most of their water from precipitation and humidity from

1560-412: Is hydrology, or flooding . The duration of flooding or prolonged soil saturation by groundwater determines whether the resulting wetland has aquatic, marsh or swamp vegetation . Other important factors include soil fertility, natural disturbance, competition, herbivory , burial, and salinity. When peat from dead plants accumulates, bogs and fens develop. Wetland hydrology is associated with

1625-505: Is overhanging. This is commonly regarded as being the largest vertical drop on Earth [1] ot:leapyear at 1,250 m (4,100 ft). of Baffin Island , rises 4,300 ft above the flat frozen fjord, although the lower portion of the face breaks from the vertical wall with a series of ledges and buttresses. Other notable cliffs include: Above Sea Above Land Above Sea Above Land Submarine Above Sea Above Land Cliff landforms provide unique habitat niches to

1690-451: Is the only place in the world where both crocodiles and alligators coexist. The saltwater crocodile inhabits estuaries and mangroves. Snapping turtles also inhabit wetlands. Birds , particularly waterfowl and waders use wetlands extensively. Mammals of wetlands include numerous small and medium-sized species such as voles , bats , muskrats and platypus in addition to large herbivorous and apex predator species such as

1755-545: Is usually saturated with water". More precisely, wetlands are areas where "water covers the soil , or is present either at or near the surface of the soil all year or for varying periods of time during the year, including during the growing season". A patch of land that develops pools of water after a rain storm would not necessarily be considered a "wetland", even though the land is wet. Wetlands have unique characteristics: they are generally distinguished from other water bodies or landforms based on their water level and on

1820-566: The Cheyenne and the Kiowa (or Pawnee ) turned one of the streams blood red. Blood Creek now flows into the lowlands. Greyhound racing in the United States traces its start to a coursing event in the bottoms in 1886. In 1900, a project known as the Koen Ditch attempted to divert Arkansas River water 12 miles (19 km) to the Bottoms so that it could be used for irrigation. The ditch washed out in

1885-498: The Cheyenne Bottoms Wildlife Area . The Bottoms is impounded and divided into a set of pools by a network of dikes . Pool 1, itself subdivided into three sub-pools, comprises the center of the wetland with Pool 2 located to its west, Pools 3A and 3B to its north, Pools 4A and 4B to its east, and Pool 5 to its south. U.S. Route 281 runs north-south 2 miles (3.2 km) west of the Bottoms. Kansas Highway 4 lies to

1950-564: The Kermadec Trench . According to some sources, the highest cliff in the world, about 1,340 m high, is the east face of Great Trango in the Karakoram mountains of northern Pakistan. This uses a fairly stringent notion of cliff, as the 1,340 m figure refers to a nearly vertical headwall of two stacked pillars; adding in a very steep approach brings the total drop from the East Face precipice to

2015-492: The Millennium Ecosystem Assessment from 2005. Methods exist for assessing wetland ecological health . These methods have contributed to wetland conservation by raising public awareness of the functions that wetlands can provide. Since 1971, work under an international treaty seeks to identify and protect " wetlands of international importance ." A simplified definition of wetland is "an area of land that

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2080-666: The Pantanal in South America, and the Sundarbans in the Ganges - Brahmaputra delta. Wetlands contribute many ecosystem services that benefit people. These include for example water purification , stabilization of shorelines, storm protection and flood control . In addition, wetlands also process and condense carbon (in processes called carbon fixation and sequestration ), and other nutrients and water pollutants . Wetlands can act as

2145-444: The atmosphere , their water usually has low mineral ionic composition. In contrast, wetlands fed by groundwater or tides have a higher concentration of dissolved nutrients and minerals. Fen peatlands receive water both from precipitation and ground water in varying amounts so their water chemistry ranges from acidic with low levels of dissolved minerals to alkaline with high accumulation of calcium and magnesium . Salinity has

2210-576: The beavers , coypu , swamp rabbit , Florida panther , jaguar , and moose . Wetlands attract many mammals due to abundant seeds, berries, and other vegetation as food for herbivores, as well as abundant populations of invertebrates, small reptiles and amphibians as prey for predators. Invertebrates of wetlands include aquatic insects such as dragonflies , aquatic bugs and beetles , midges, mosquitos , crustaceans such as crabs, crayfish, shrimps, microcrustaceans, mollusks like clams, mussels, snails and worms. Invertebrates comprise more than half of

2275-755: The 8 Wonders of Kansas. Wetland Wetlands exist on every continent , except Antarctica . The water in wetlands is either freshwater , brackish or saltwater . 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 . Swamps are dominated by woody vegetation such as trees and shrubs (although reed swamps in Europe are dominated by reeds, not trees). Mangrove forest are wetlands with mangroves , halophytic woody plants that have evolved to tolerate salty water . Examples of wetlands classified by

2340-465: The Arkansas was pumped into the wetland because of drought and claims by other entities on the water supply. In the 1990s, an extensive renovation subdivided the marshes. The renovations allowed the marshes to be more self-sustaining, although an adequate water supply and management of water levels continue to be critical problems. Also in the 1990s, The Nature Conservancy began acquiring land adjacent to

2405-619: The Okavango River inland delta, the Kafue River flood plain, the Lake Bangweulu flood plain (Africa), Mississippi River (US), Amazon River (South America), Yangtze River (China), Danube River (Central Europe) and Murray-Darling River (Australia). Groundwater replenishment can be achieved for example by marsh , swamp , and subterranean karst and cave hydrological systems. The surface water visibly seen in wetlands only represents

2470-505: The Old English word clif of essentially the same meaning, cognate with Dutch, Low German, and Old Norse klif 'cliff'. These may in turn all be from a Romance loanword into Primitive Germanic that has its origins in the Latin forms clivus / clevus ("slope" or "hillside"). Given that a cliff does not need to be exactly vertical, there can be ambiguity about whether a given slope

2535-511: The Southeastern US, mallines of Argentina, Mediterranean seasonal ponds of Europe and California, turloughs of Ireland, billabongs of Australia, among many others. Wetlands are found throughout the world in different climates. Temperatures vary greatly depending on the location of the wetland. Many of the world's wetlands are in the temperate zones , midway between the North or South Poles and

2600-494: The US, the best known classifications are the Cowardin classification system and the hydrogeomorphic (HGM) classification system. The Cowardin system includes five main types of wetlands: marine (ocean-associated), estuarine (mixed ocean- and river-associated), riverine (within river channels), lacustrine (lake-associated) and palustrine (inland nontidal habitats). Peatlands are

2665-610: The United States' commercial fish and shellfish stocks depend solely on estuaries to survive. Amphibians such as frogs and salamanders need both terrestrial and aquatic habitats in which to reproduce and feed. Because amphibians often inhabit depressional wetlands like prairie potholes and Carolina bays, the connectivity among these isolated wetlands is an important control of regional populations. While tadpoles feed on algae, adult frogs forage on insects. Frogs are sometimes used as an indicator of ecosystem health because their thin skin permits absorption of nutrients and toxins from

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2730-419: The acreage of the wildlife management area. The pools average less than one foot deep. Pools one and five are closed to all human activities. Surrounding the pools are mudflats, ponds, and islands. Elevated areas are primarily grasslands with a few trees. Waterfowl hunting, primarily for geese, is permitted along the southern border of the state wildlife management area. Cheyenne Bottoms is especially noted for

2795-512: The concentration of migratory shorebirds that come here to feed on the mudflats. As many as 600,000 shorebirds from 39 species pass through Cheyenne Bottoms during spring migration and up to 200,000 in fall. About 45 percent of all shorebirds in North America utilize the area. Cheyenne Bottoms is critical habitat for many endangered species, including the whooping crane . At least 340 species of birds have been observed at Cheyenne Bottoms. As

2860-622: The equator. In these zones, summers are warm and winters are cold, but temperatures are not extreme. In subtropical zone wetlands, such as along the Gulf of Mexico , average temperatures might be 11 °C (52 °F). Wetlands in the tropics are subjected to much higher temperatures for a large portion of the year. Temperatures for wetlands on the Arabian Peninsula can exceed 50 °C (122 °F) and these habitats would therefore be subject to rapid evaporation. In northeastern Siberia , which has

2925-494: The following areas: According to the Ramsar Convention: The economic worth of the ecosystem services provided to society by intact, naturally functioning wetlands is frequently much greater than the perceived benefits of converting them to 'more valuable' intensive land use – particularly as the profits from unsustainable use often go to relatively few individuals or corporations, rather than being shared by society as

2990-536: The highest at 1370 m (4500 ft) high in total (the top 480 m (1600 ft) is overhanging), and is said to give it the longest vertical drop on Earth at 1,250 m (4,100 ft). However, other cliffs on Baffin Island, such as Polar Sun Spire in the Sam Ford Fjord , or others in remote areas of Greenland may be higher. The highest cliff in the solar system may be Verona Rupes , an approximately 20 km (12 mi) high fault scarp on Miranda ,

3055-464: The interface between truly terrestrial ecosystems and aquatic systems, making them inherently different from each other, yet highly dependent on both." In environmental decision-making, there are subsets of definitions that are agreed upon to make regulatory and policy decisions. Under the Ramsar international wetland conservation treaty , wetlands are defined as follows: An ecological definition of

3120-462: The known animal species in wetlands, and are considered the primary food web link between plants and higher animals (such as fish and birds). Depending on a wetland's geographic and topographic location, the functions it performs can support multiple ecosystem services , values, or benefits. United Nations Millennium Ecosystem Assessment and Ramsar Convention described wetlands as a whole to be of biosphere significance and societal importance in

3185-432: The nearby Dunge Glacier to nearly 2,000 m. The location of the world's highest sea cliffs depends also on the definition of 'cliff' that is used. Guinness World Records states it is Kalaupapa, Hawaii , at 1,010 m high. Another contender is the north face of Mitre Peak , which drops 1,683 m to Milford Sound , New Zealand. These are subject to a less stringent definition, as the average slope of these cliffs at Kaulapapa

3250-451: The north and runs east-west, and Kansas Highway 156 runs northeast-southwest through the wetland's southeast portion. The Bottoms is directly accessible via a network of unpaved gravel roads, several of which run along the tops of the dikes. The formation of the wetland in a natural basin in a semi-arid area is not entirely understood. It is surrounded on the north, east, and west by bluffs as high as 100 feet (30 m). The basin traps

3315-587: The northwest. Its other inflow is an inlet canal from Walnut Creek to the southwest. The wetland's primary outflow is an outlet canal to Little Cheyenne Creek to the southeast. Little Cheyenne Creek empties into Cow Creek, a tributary of the Arkansas River . Cheyenne Bottoms lies entirely within Barton County . The entire wetland occupies a natural land sink spanning 41,000 acres or 64 square miles (170 km). Of that area, 19,857 acres (80.36 km) constitutes

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3380-407: The objective of providing a diverse marsh habitat for the use of migrating and breeding waterfowl and shorebirds. The Kansas Wetlands Education Center within the wildlife management area interprets the wetlands and wildlife for visitors. Approximately 60,000 people visit Cheyenne Bottoms yearly. On January 29, 2008, Quivira National Wildlife Refuge and Cheyenne Bottoms were jointly named as one of

3445-832: The plants and animals controlled by the wetland hydrology are often additional components of the definitions. Wetlands can be tidal (inundated by tides) or non-tidal. The water in wetlands is either freshwater , brackish , saline , or alkaline . There are four main kinds of wetlands – marsh , swamp , bog , and fen (bogs and fens being types of peatlands or mires ). Some experts also recognize wet meadows and aquatic ecosystems as additional wetland types. Sub-types include mangrove forests , carrs , pocosins , floodplains , peatlands, vernal pools , sinks , and many others. The following three groups are used within Australia to classify wetland by type: Marine and coastal zone wetlands, inland wetlands and human-made wetlands. In

3510-429: The soil and underlying rock into aquifers which are the source of much of the world's drinking water . Wetlands can also act as recharge areas when the surrounding water table is low and as a discharge zone when it is high. Mangroves , coral reefs , salt marsh can help with shoreline stabilization and storm protection. Tidal and inter-tidal wetland systems protect and stabilize coastal zones. Coral reefs provide

3575-537: The soil of wetlands. Anaerobic and aerobic respiration in the soil influences the nutrient cycling of carbon, hydrogen, oxygen, and nitrogen, and the solubility of phosphorus thus contributing to the chemical variations in its water. Wetlands with low pH and saline conductivity may reflect the presence of acid sulfates and wetlands with average salinity levels can be heavily influenced by calcium or magnesium. Biogeochemical processes in wetlands are determined by soils with low redox potential. The life forms of

3640-412: The soils and plants at higher elevations. Plants and animals may vary within a wetland seasonally or in response to flood regimes. There are four main groups of hydrophytes that are found in wetland systems throughout the world. Submerged wetland vegetation can grow in saline and fresh-water conditions. Some species have underwater flowers, while others have long stems to allow the flowers to reach

3705-515: The sources of water include tidal wetlands , where the water source is ocean tides ); estuaries , water source is mixed tidal and river waters; floodplains , water source is excess water from overflowed rivers or lakes; and bogs and vernal ponds , water source is rainfall or meltwater . The world's largest wetlands include the Amazon River basin , the West Siberian Plain ,

3770-406: The spatial and temporal dispersion, flow, and physio-chemical attributes of surface and ground waters. Sources of hydrological flows into wetlands are predominantly precipitation , surface water (saltwater or freshwater), and groundwater. Water flows out of wetlands by evapotranspiration , surface flows and tides , and subsurface water outflow. Hydrodynamics (the movement of water through and from

3835-554: The state wildlife area. Cheyenne Bottoms is located at 38°28′10″N 98°39′21″W  /  38.46944°N 98.65583°W  / 38.46944; -98.65583 (38.4694559, -98.6559125) at an elevation of 1,795 feet (547 m). It lies in central Kansas in the Arkansas River Lowlands region of the Great Plains . Its primary inflows are two small local streams, Blood Creek and Deception Creek, which flow into it from

3900-709: The surface of the water. When trees and shrubs comprise much of the plant cover in saturated soils, those areas in most cases are called swamps . The upland boundary of swamps is determined partly by water levels. This can be affected by dams Some swamps can be dominated by a single species, such as silver maple swamps around the Great Lakes . Others, like those of the Amazon basin , have large numbers of different tree species. Other examples include cypress ( Taxodium ) and mangrove swamps. Many species of fish are highly dependent on wetland ecosystems. Seventy-five percent of

3965-490: The surface. Submerged species provide a food source for native fauna, habitat for invertebrates, and also possess filtration capabilities. Examples include seagrasses and eelgrass . Floating water plants or floating vegetation are usually small, like those in the Lemnoideae subfamily (duckweeds). Emergent vegetation like the cattails ( Typha spp.), sedges ( Carex spp.) and arrow arum ( Peltandra virginica ) rise above

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4030-457: The surrounding environment resulting in increased extinction rates in unfavorable and polluted environmental conditions. Reptiles such as snakes , lizards , turtles , alligators and crocodiles are common in wetlands of some regions. In freshwater wetlands of the Southeastern US, alligators are common and a freshwater species of crocodile occurs in South Florida. The Florida Everglades

4095-440: The types of plants that live within them. Specifically, wetlands are characterized as having a water table that stands at or near the land surface for a long enough period each year to support aquatic plants . A more concise definition is a community composed of hydric soil and hydrophytes . Wetlands have also been described as ecotones , providing a transition between dry land and water bodies. Wetlands exist "...at

4160-415: The water of Blood and Deception Creeks. One of the most popular theories is that Cheyenne Bottoms was created as a sinkhole when incoming freshwater dissolved underground salt. However, this theory is challenged by critics who say that not enough salt is present in the base to cause this. Other theories to explain the formation of Cheyenne Bottoms are that there was structural movement in its base, that it

4225-501: Was part of a Pleistocene drainage system involving the Smoky Hill River , and that it was created by sand dunes that scoured the flatlands and blocked drainage. Historically, Cheyenne Bottoms has been a lake of varying size, a mudflat, or dry. With management to control water and provide a secure way-station for migrating waterfowl and shore birds, it now has 5 pools, crisscrossed by dikes, canals, and pathways, that cover most of

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