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The result is a large number of wetland classification systems that each define wetlands and wetland types in their own way. [1] However, many classification systems include four broad categories that most wetlands fall into: marsh , swamp, bog , and fen. [ 1 ]
Palustrine wetlands include any inland wetland that contains ocean-derived salts in concentrations of less than 0.5 parts per thousand, and is non-tidal. [1] The word palustrine comes from the Latin word palus or marsh. [2] Wetlands within this category include inland marshes and swamps as well as bogs, fens, pocosins, tundra and floodplains.
The current status of on-line wetlands data is shown in figure 1. Web accessible geospatial wetlands data can be found at the U.S. Fish and Wildlife website. Additional web accessible Geodatabase documentation and information can be found in the Appendix on page 11. The wetlands data layer is increasing in size each year primarily due to ...
Wetland indicator status denotes the probability of individual species of vascular plants occurring in freshwater, brackish and saltwater wetlands in the United States. The wetland status of 7,000 plants is determined upon information contained in a list compiled in the National Wetland Inventory undertaken by the U.S. Fish and Wildlife Service ...
Fen meadows have been severely impacted by farming, resulting in hydrological changes, acidification, and nutrient pollution, leaving few preserved into the 21st century. [1] Compositional transformations and increased groundwater flow have the greatest effect this habitat and can degrade peat. [ 2 ]
The National Wetlands Inventory (NWI) was established by the United States Fish and Wildlife Service (FWS) to conduct a nationwide inventory of U.S. wetlands to provide biologists and others with information on the distribution and type of wetlands to aid in conservation efforts.
An image of the Everglades National Park, a large minerotrophic wetland located in the United States of America. The hydrological setting of a wetland strongly influences its characteristics. [ 4 ] Chemical ions are transported to wetlands via their hydrological system, and in turn affect pH, conductivity, and nutrient levels. [ 7 ]
A carr is a type of waterlogged wooded terrain that, typically, represents a succession stage between the original reedy marsh and the likely eventual formation of forest in a sub [clarification needed]-maritime climate. [1] Carrs are wetlands that are dominated by shrubs rather than trees. [2]