Linked from
The 9 pages that link to The Fens, each with the reason it gives.
WetlandBroader topic: Fens contrast with rain-fed bogs through their water sources and chemistry.
BogCompared with: Fens receive mineral inputs that precipitation-fed bogs generally lack.
MarshCompared with: Fens are defined by peat and water chemistry, not simply herbaceous cover.
RenminbiBroader topic: Fen is the smallest standard unit in the renminbi’s decimal structure.
Hudson Bay LowlandsBroader topic: Fens occur where mineral-rich water reaches the peat surface.