Marsh and swamp
These wetland habitats are found across the UK, often blending with other wetland habitats such as reedbed, fen, and carr (wet woodlands). Marshes usually develop on a mineral soil with a water level close to the surface for most of the year, but not usually above ground level. In swamps, the water levels are above or at the surface of the vegetation for most of the year. These habitats are dynamic and management is necessary to maintain them and associated species, and prevent natural succession to scrub and woodland.
In the Tees Valley, key sites include Portrack and Coatham Marsh, and Carlton Rushby Pasture.
