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Raised bog information


Aerial view of seven of the most important raised bogs sites in Wales; Natural Resources Wales, 2017.
Ewiges Meer Nature Reserve, raised bog element of the remains of a bog in East Frisia
Peat moss floating mat on a silted-up raised bog kolk

Raised bogs, also called ombrotrophic bogs, are acidic, wet habitats that are poor in mineral salts and are home to flora and fauna that can cope with such extreme conditions. Raised bogs, unlike fens, are exclusively fed by precipitation (ombrotrophy) and from mineral salts introduced from the air. They thus represent a special type of bog, hydrologically, ecologically and in terms of their development history, in which the growth of peat mosses over centuries or millennia plays a decisive role. They also differ in character from blanket bogs which are much thinner and occur in wetter, cloudier climatic zones.[1]

Raised bogs are very threatened by peat cutting and pollution by mineral salts from the surrounding land (due to agriculture and industry). The last great raised bog regions are found in western Siberia and Canada.

  1. ^ Whittow, John (1984). Dictionary of Physical Geography. London: Penguin, 1984, p. 438. ISBN 0-14-051094-X.

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Raised bog

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this site is protected as an SAC are the presence of active raised bog, of degraded raised bogs still capable of natural regeneration, and of depressions...

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slowly spread into drier conditions, forming larger mires, both raised bogs and blanket bogs. Thus, Sphagnum can influence the composition of such habitats...

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form part of the structure of certain types of raised bog, such as plateau, kermi, palsa or string bog. The hummocks alternate with shallow wet depressions...

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destitute areas of Scotland. The Moine Mhòr encompasses a large area of raised bog, saltmarsh, brackish grassland, alder carr, fen and woodland to the west...

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