A fen is one of the four main types of wetland, and is usually fed by mineral-rich surface water or groundwater. Fens are characterised by their water chemistry, which is neutral or alkaline, with relatively high dissolved mineral levels but few other plant nutrients. They are usually dominated by grasses and sedges, and typically have brown mosses in general including Scorpidium or Drepanocladus. Fens frequently have a high diversity of other plant species including carnivorous plants such as Pinguicula. They may also occur along large lakes and rivers where seasonal changes in water level maintain wet soils with few woody plants. The distribution of individual species of fen plants is often closely connected to water regimes and nutrient concentrations.

Fens have a characteristic set of plant species, which sometimes provide the best indicators of environmental conditions. For example, fen indicator species in New York include Carex flava, Cladium mariscoides, Potentilla fruticosa, Pogonia ophioglossoides and Parnassia glauca.

Fens are distinguished from bogs, which are acidic, low in minerals, and usually dominated by sedges and shrubs, along with abundant mosses in the genus Sphagnum.

Fens have been damaged in the past by land drainage, and also by peat cutting. Some are now being carefully restored with modern management methods. The principal challenges are to restore natural water flow regimes, to maintain the quality of water, and to prevent invasion by woody plants.

Read more about FenEtymology, Vegetation

Other articles related to "fen, fens":

Fen - Vegetation
... It is a fen overgrown with generally small trees of species such as willow (Salix spp.) or alder (Alnus spp.) ... In general, fens may change in composition as peat accumulates ... A list of species found in a fen can therefore cover a range of species from those remaining from the earlier stage in the successional development to the pioneers of the succeeding stage ...
Little Ouse Headwaters Project
... It includes a number of areas including Hinderclay Fen, Blo' Norton Fen, Betty's Fen, The Frith, Blo' Norton Lowes, Blo' Norton Little Fen and Parker's Piece ... The area also include parts of the Blo' Norton and Thelnetham Fen Site of Special Scientific Interest (SSSI) ... is a registered charity and holds monthly work parties to manage the habitat of the various fens ...
List Of Fish On Stamps Of China
... Order Family 1960 (01.06) Carassius auratus auratus (Linnaeus, 1758) 4 fen 506/509 0 534/537 0 Cypriniformes Cyprinidae Carassius auratus auratus (Linnaeus, 1758) 8 fen ...
List Of United Kingdom Locations: Fa-Fe - Fe - Fen
56.77°N 03.83°W / 56.77 -03.83 NN8866 Fen Ditton Cambridgeshire 52°13′N 0°10′E / 52.21°N 00.16°E / 52.21 00.16 TL4860 Fen ...
List Of Fushigi Yûgi Characters - Genbu - Hatsui
... Sometime later, a woman named Fen discovered him there and befriended him ... However, when Takiko and Tomite arrive to find Hatsui, it is revealed that Fen is an assassin with a mission to kill the Genbu Celestial Warriors and their ... After rescuing him from Fen, Hatsui becomes the second Celestial Warrior to join Takiko ...

Famous quotes containing the word fen:

    Feather-footed through the plashy fen passes the questing vole.
    Evelyn Waugh (1903–1966)