fondrière de mousse

CONT: Une fondrière de mousse ou muskeg est, dans le nord du Canada et en Alaska, un marécage d'une région peu ou pas drainée dont le fond est constitué de roche ou d'argile à blocaux (masse d'argile contenant des cailloux de toutes formes disposés sans ordre). [...] La fondrière est remplie de sphaigne, de déchets végétaux décomposés et saturés d'eau ainsi que d'arbres chétifs ici et là. Le sphaigne peut retenir de 15 à 30 fois son poids en eau ce qui permet à ces tourbières d'avoir une pente sans se vider.
CONT: Les fondrières favorisent la croissance d'arbres à enracinement superficiel, comme les épinettes noires et les mélèzes d'Amérique.

CONT: Muskeg ... is a dominant feature of the Canadian landscape as well as a significant feature of northeastern BC [British-Columbia]. [It] is a complex of various wetland types such as: bogs, fens, marshes and swamps. Bogs and fens are the dominant and most widespread wetland types of muskeg ecosystems while marshes and swamps are less common.
OBS: Muskeg is a complex of wetland types that typically occur in cool, northern climates such as boreal forests. ...The colloquial, and widely misunderstood, term muskeg is used to refer to the complex mosaic of fens, bogs, swamps and pools, and scrubby forest that becomes increasingly common to the north ... Peatmoss is the common factor of muskeg and is where the term peatland is derived from. Pieces of herbs, shrubs and wood, such as buried tree branches, roots, or whole trees, can also make up a portion of the organic soil. Sphagnum moss is the mainstay of muskeg. It soaks up and holds several times its own weight in water. In the process, it keeps water from draining through the soil.