bog

…Peat bogs are widely distributed, covering 6% of the world's land area, or 9 million km2. They are broadly divided into mineralotrophic (eutrophic) fens, which are recharged with water that is rich in nutrients and not very acidic, and ombrotrophic (oligotrophic) bogs, which are recharged only by rainwater and are acidic with few nutrients. Those in between are called mesotrophic fens. The terms low moor, middle moor, and high moor, which are terms derived from the relationship with groundwater levels, are commonly used to mean oligotrophic, mesotrophic, and eutrophic fens, respectively. …

*Some of the terminology explanations that mention "bog" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…泥炭湿原の分布は広く，世界陸地面積の6％，900万km2を占める。栄養物質に富み酸性度も高くない水に涵養される鉱物質栄養性(富栄養性)湿原fenと，涵養水が雨水に限られ，栄養物質が少なく酸性の水に涵養される降水栄養性(貧栄養性)湿原bogとに大別され，中間のものを中栄養性湿原という。地下水位との関係でできた語で，よく用いられている低層湿原low moor，中間湿原middle moor，高層湿原high moorという呼び方は，それぞれ貧･中･富栄養性湿原の意味で使われている。…

※「bog」について言及している用語解説の一部を掲載しています。

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