Sphagnumdominante

Sphagnumdominante is a term used in peatland ecology to describe the state in which Sphagnum mosses are the dominant component of the vegetation in a mire. It refers to the dominance by cover or biomass of Sphagnum species over other bryophytes and vascular plants, and to the ecological functions associated with that dominance, rather than to a formal species name.

Taxonomy and usage: The term is not a recognized taxonomic designation. It is a descriptive concept used to classify peatland communities by the relative abundance of Sphagnum. In some studies, the idea of Sphagnum dominance is linked to specific assemblages of Sphagnum species and to the physical conditions that support peat accumulation.

Ecology and habitat: Sphagnum-dominant communities typically occur in ombrotrophic or weakly minerotrophic peatlands, where water saturation and low nutrient availability create acidic conditions. Sphagnum mats regulate hydrology by storing water, lowering pH, and creating an environment that slows decomposition, thereby promoting peat formation.

Distribution and dynamics: Sphagnum-dominant states are widespread across boreal and temperate peatlands in parts of North America, Europe, and Asia. Their relative extent can shift with hydrological changes, climate warming, drainage, or nutrient inputs. Rewetting and restoration efforts aim to reestablish Sphagnum dominance to recover natural peatland structure and function.

Importance and research: The concept of Sphagnum dominance is used to assess peatland health, carbon sequestration potential, and restoration success. It is linked to ecosystem services such as water storage, methane dynamics, and biodiversity support. Further research investigates species composition, hydrology, and resilience of Sphagnum-dominant peatlands.