Mossdominated

Mossdominated refers to ecosystems or surface-cover conditions in which mosses (Bryophyta) are the most abundant and functionally influential vegetation. In mossdominated systems, continuous moss mats regulate moisture, temperature, and light at the micro scale, and they play a key role in soil formation and nutrient cycling despite often having low vascular plant biomass.

Characteristics of mossdominated communities include high bryophyte biomass relative to vascular plants, slow rates of nutrient turnover, and a thick, water-retentive layer on soil, rock, or litter. Mosses can desiccate quickly but also rehydrate rapidly when moisture returns, creating stable microhabitats for microfauna and helping moderate temperature fluctuations. The structure of the moss layer can influence seed germination and establishment of other plants, sometimes facilitating colonization by certain species while acting as a physical barrier to others.

Mossdomination occurs in a variety of environments, notably boreal and temperate forest floors with cool, humid conditions; peatlands where Sphagnum species form extensive mats; rocky outcrops and tundra surfaces; and areas recovering from disturbance where fast-growing mosses spread before vascular plants reestablish. Disturbances such as fire, drainage, trampling, or nutrient input can shift systems toward moss dominance, especially in nutrient-poor settings. Recovery is often slow, given mosses’ modest growth rates and specific moisture requirements.

Ecological significance includes water storage, insulation of soils, and creation of biodiversity niches for invertebrates and microfauna. In management and restoration, maintaining or restoring moss layers can support moisture regulation and habitat complexity, while declines may indicate changes in climate, hydrology, or pollution.