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73-679: In the late 1980s through mid-1990s, a large citizens' committee initiated by the Dallas City Council worked with staff from the City of Dallas and the regional Council of Governments (COG) to prepare a plan for use of the Trinity River Corridor in Dallas. Neighborhood groups, environmental groups and business interests formed the large majority of the members. Neighborhoods wanted recreational amenities; environmental groups wanted to preserve one of

146-711: 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

219-402: 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

292-660: A member of his Texas finance committee. Perot was a member of the board of directors for Dell Inc . He is a board member of Guide IT. He chairs the United States Air Force Memorial Foundation and co-chairs the EastWest Institute . He also sits on the Board of Trustees of St. Mark's School of Texas, Southern Methodist University , and Vanderbilt University. In 2010 Forbes reported Perot's net worth at $ 1.5 (~$ 2.05 billion in 2023) billion. Perot

365-442: A minority stake in the team, as does Carter's estate. In 2023, it was announced that Perot was one of the owners of Major League Cricket team Texas Super Kings. He and Anurag Jain, partner with Perot Jain and chairman of Access Healthcare, were among the investors in a Series A funding round that will help MLC build facilities across the country. Perot contributed $ 660,000 to Donald Trump 's 2020 presidential campaign . During

438-475: A place of relaxation and play for downtown residents who currently have limited outdoor recreational opportunities. Although rare, downtown Dallas has suffered severe flooding and the Trinity River Project has enlisted local and government officials for advice on extending and improving the current levee system protecting the downtown area. Current plans to improve the existing levees are part of what

511-597: A planning process began with construction on the project starting in 2005. Proponents believe this development will bring more life, commerce, revenue to the downtown Dallas region. In 2004, The Trinity Trust Foundation was formed to raise public awareness and secure private funds in support of the Trinity River Corridor Project, including the Margaret Hunt Hill Bridge, Margaret McDermott Bridge, Ronald Kirk Bridge, trails and other components of

584-1248: 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

657-540: 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

730-422: 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

803-410: 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

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876-508: 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

949-422: 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

1022-403: 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

1095-558: 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

1168-577: 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,

1241-710: Is building Harvest, a $ 1 billion, 1,150-acre development in Northlake and Argyle. Hillwood Communities recently kicked off developments including the 1006.5 acres development Pomona in Manvel and the 787-acre Union Park in Little Elm . From 2002 to 2003, Perot chaired the Texas Governor's Task Force for Economic Growth. In March 2007, presidential candidate Mitt Romney , seeking the Republican Party nomination, selected Perot as

1314-440: 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

1387-629: 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

1460-412: 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

1533-530: Is known as the Dallas Floodway Extension project. They entail extending two existing levees and raising two others, all adjacent to the downtown Dallas area. A second component of Dallas' efforts for increased flood protection involves the construction of a series of wetlands within the Trinity basin; these wetlands are being constructed to divert excess water away from the Trinity and absorb it outside

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1606-496: Is still scheduled to perform the design work. As of April 2014, footings for the bridge's arches have been constructed, while steel fabrication has been taking place at Tampa Steel Erecting Company's plant in Florida. The general contractor, American Bridge, expected steel components to arrive on site in Dallas during the fall of 2014. The Trinity River Audubon Center opened in mid-October 2008. The set of trails and parks included in

1679-487: Is the eldest of American billionaire businessman and former United States presidential candidate Ross Perot 's five children. Perot was born and raised in Dallas, the son of Margot (née Birmingham) and Ross Perot . He graduated from St. Mark's School of Texas in 1977. After graduating from Vanderbilt University , he served in the United States Air Force for eight and a half years. In 1982, Perot co-piloted

1752-451: 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

1825-545: 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

1898-585: The 2024 Republican Party presidential primaries , Perot endorsed former U.S. ambassador to the U.N. Nikki Haley . Perot and Harlan Crow worked together to raise money in Texas for the Haley campaign . Wetlands A wetland is a distinct semi-aquatic ecosystem whose groundcovers are flooded or saturated in water , either permanently, for years or decades, or only seasonally. Flooding results in oxygen -poor ( anoxic ) processes taking place, especially in

1971-492: 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

2044-666: 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

2117-553: The River Walk in San Antonio or Lady Bird Lake in Austin . In 1998, then-mayor Ron Kirk championed a much more commercial project that aimed to renovate the river through Dallas. Voters approved a bond proposal to fund a major cleanup of the river, construction of park facilities, wildlife habitats, flood-protection devices such as levees , and related road construction. Once passed,

2190-540: The Texas Conservation Association and Diana Christopulos of the Sierra Club's Dallas Group were instrumental in the original conservation planning, and many others have carried it on for over 30 years. The Great Trinity River Project has since become one of the most impressive municipal efforts combining conservation, recreation and thoughtful development. Mayor Steve Bartlett was largely supportive of

2263-444: 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

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2336-576: 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

2409-607: The soils . Wetlands form a transitional zone between waterbodies and dry lands , and are different from other terrestrial or aquatic ecosystems due to their vegetation 's roots having adapted to oxygen-poor waterlogged soils . They are considered among the most biologically diverse of all ecosystems, serving as habitats to a wide range of aquatic and semi-aquatic plants and animals , with often improved water quality due to plant removal of excess nutrients such as nitrates and phosphorus . Wetlands exist on every continent , except Antarctica . The water in wetlands

2482-575: The Mavericks made no more progress on the court than they had in Carter's final seasons, and nowhere near what they did under his successor, Mark Cuban . It was said that he was a basketball novice, or uninterested in the sport, and was using his position as team owner to front his projects, most notably Victory Park , which was anchored by the American Airlines Center , which opened in 2001. He sold

2555-619: 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

2628-511: 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

2701-494: 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

2774-610: 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

2847-473: The Victory Park real estate development. The lawsuit was dismissed in 2011, due in part to Cuban asserting proper management of the team due to its recent victory in the 2011 NBA Finals . In 2014, the 5th Circuit Court affirmed that decision on appeal. After his initial defeat, Perot attempted to prevent Mavericks fans from using the parking lots he controlled near the American Airlines Center . Perot retains

2920-462: The aforementioned bridges pass over the lakes before entering downtown. The project also contains a 40,000-acre (160 km) impact zone for economic development along the Trinity River. It will include retail, restaurants, residential developments, and offices, and also attract business into the city. Currently there exists a broad section of developed land between the skyscrapers of downtown and

2993-405: The bike paths, cost $ 235 million; its total length is 570 meters (1,870 ft) with a main span of 365 meters (1,198 ft), and an apex-height of 122 meters (400 ft). The Trinity River Corridor Project has been billed as a threefold venture: one that seeks to protect downtown Dallas against future flooding, to improve transportation through the congested downtown district, and to provide

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3066-443: The citizens' committee efforts. However, Mayor Ron Kirk initially rejected all work to date when he assumed office. He preferred business and commercial ventures. Businesses and businessmen, like Ross Perot, Jr. , have pushed in recent years to build a multimillion-dollar, landmark bridge over the river and convert the section of the river near downtown into a park area, with nearby commercial and retail services, somewhat similar to

3139-411: The completion dates on many of these projects have been pushed back. The city of Dallas spent $ 4 million to build the standing wave whitewater course. The attraction opened in 2011 but was almost immediately deemed unsafe. The city spent another $ 2 million to remove the course in 2018. In September 2023, updated plans for a Trinity River park were revealed. The plans marked a significant departure from

3212-777: The direction of Dallas officials, the North Texas Tollway Authority ( NTTA ), and the Texas Department of Transportation ( TxDOT ), the tollway was to have been constructed on the side of the Trinity closest to downtown. It would have accommodated four lanes of traffic, with some sections possibly increased to six lanes; the parkway was to cost approximately $ 1.8 billion. The Trinity River Project incorporates several new recreational developments aimed at improving quality of life for downtown Dallas residents and visitors. These include an Audubon center (opened in October 2008 at

3285-622: 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

3358-529: The first flight by helicopter around the world. Using a Bell 206 L-1 Long Ranger II, he completed the circumnavigation on September 30, 1982. Perot chairs The Perot Group, which manages the Perot family's various interests, including real estate, oil and gas, and financial investments. He developed the Fort Worth Alliance Airport and is a large real estate developer. Hillwood's residential division

3431-494: 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

3504-464: 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

3577-462: 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

3650-479: The largest remaining riparian forests in the state of Texas; business groups wanted to build a multi-lane highway along the river corridor. Charlie Johnson of the Loop 12 area chaired the subcommittee that named the large natural area near the confluence of White Rock Creek as The Great Trinity Forest. She was also a tireless advocate for the people of her minority neighborhood. Environmentalists such as Ned and Genie Fritz of

3723-474: The levees in West Dallas. Ross Perot, Jr. Henry Ross Perot Jr. (born November 7, 1958 ) is an American real estate developer and businessman best known for his development of Alliance, Texas , an inland port near Dallas–Fort Worth, and for making the first circumnavigation of the world in a helicopter, at age 23. Perot chairs multiple companies, including The Perot Group and Hillwood. He

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3796-832: 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

3869-507: The project allowed for a "parkway" within the project area. By 2007, Dallas business and political leaders had convinced the city to plan for a six- to eight-lane tollway that would link the suburban North Dallas area to southern-bound freeways with no entrance or exit ramps near the park. Following a requirement by the Army Corps of Engineers to move the road into the proposed park area, city councilwoman Angela Hunt and local activists argued that

3942-483: The project have varying start and end dates: for most, construction has already begun or will begin this year and is set to be complete in 2009. The standing wave will also begin construction in 2008 with a completion date of spring 2009. Both the sports complex and horse park are slated to break ground in 2009, with completion dates of 2010 and 2011, respectively. The two lakes are scheduled to begin construction in 2011 with an opening date of 2014. Due to funding issues,

4015-599: The project. On December 12, 2005, construction on the Margaret Hunt Hill Bridge began — the bridge is one of three Santiago Calatrava -designed bridges to be constructed as part of the project. Though official construction began almost a year and a half earlier, heavy construction did not start until June 2008. Completed in 2012, it connects Woodall Rodgers Freeway in downtown to Singleton Avenue in west Dallas . The conventional concrete pier-and-beam bridge with cosmetic arches and cable stays, supporting only

4088-482: The river channel, further reducing flood danger. Two sections of wetlands are under construction, an Upper Chain and a Lower Chain , with the latter completed in 2008. The Trinity Parkway , the most controversial portion of the project, was a proposed nine-mile (14 km) parkway located inside the river levees but above the floodplain; it was to provide an alternate route for Dallas residents and business travelers, and relieve intense Dallas highway traffic. Under

4161-417: The road would cripple the planned development; tollway supporters pointed to the planned roadway's ability to decongest the undersized "Mixmaster" interchange between I-35, I-30 and US-75, and argued that attempting to move the road would require a cost-prohibitive exercise of eminent domain. In a referendum sparked by Hunt, voters narrowly approved the construction of the toll road, thanks primarily to voters in

4234-498: The second signature bridge, will replace the existing Interstate 30 bridge over the Trinity River. It was originally scheduled to begin construction in 2011, and be completed by 2014. However, in late 2011 funding for the bridge was moved to come from within the Project Pegasus initiative, with construction contracts to be awarded in mid-2012. The new plan features 'toned-down' elements of its original arch design, although Calatrava

4307-586: The site of an illegal landfill in South Dallas), a set of new trails for biking, hiking, and walking, parks, a standing wave, sports complexes, a horse park, and two manmade lakes. These amenities are set to be added to various areas adjacent to downtown Dallas. The two lakes, named the Urban Lake and the Natural Lake by project officials, are set to be built in line with the Dallas cityscape so that cars crossing

4380-429: 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

4453-537: 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

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4526-412: 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

4599-515: 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 ,

4672-406: 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

4745-509: The suburban north end of the city. After the referendum controversy continued, citizens began to change their minds and the city council finally cancelled the road project in August 2017. The Margaret Hunt Hill Bridge, the largest portion of the Trinity project started thus far, is currently complete and open to traffic connecting Spur 366 to Singleton Blvd. Completed at a cost of $ 120 million, it opened March 2012. The Margaret McDermott Bridge ,

4818-709: 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

4891-490: 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

4964-457: 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

5037-536: The team to Cuban in January 2000 and the franchise did not have a losing record in any of the next 15 seasons, winning two Western Conference championships and the 2011 NBA championship . In May 2010, Perot, who retained 5% ownership, sued Cuban, alleging the franchise was insolvent or in imminent danger of insolvency. In June 2010, Cuban responded in a court filing maintaining Perot was wrongly seeking money to offset $ 100 million (~$ 136 million in 2023) in losses on

5110-440: 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

5183-475: The vision for the development. The park would be named after Dallas businessman Harold Simmons and would come with a $ 325 million price significantly higher than the Trinity River Conservancy's $ 150 million proposed project announced in 2015. In addition, where previous plans called for a nature-oriented park inside the river levees, the new proposed project would feature amenities set mostly outside

5256-530: The water's edge of the Trinity and the two lakes. Recently, Dallas city hall has put forth new zoning laws concerning this area; this new legislation redefines the types of structures that can be built in this area and extends downtown's sphere of influence with its model of highrise and high density construction out to the Trinity river. Although the original bond proposal was passed in 1998, work progressed slowly. A proposed toll road garnered significant criticism from community activists. The 1998 bond proposal for

5329-773: Was the 1983 recipient of the Langley Gold Medal from the Smithsonian Institution . . In April 2020, Governor Greg Abbott named Perot to the Strike Force to Open Texas, a group "tasked with finding safe and effective ways to slowly reopen the state" during the COVID-19 pandemic . Perot purchased the Dallas Mavericks NBA basketball team from original owner Don Carter in March 1996 . During his four-year tenure,

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