Bryophytes (mosses and liverworts)

N deposition :: Mosses and liverworts (general)

Impact Type: Deposition of pollutant

Key Concerns:

Many bryophytes rely largely on rainfall for a supply of nutrients (Tamm 1953, Brown and Bates 1990). Due to a virtual absence of cutin development, mineral ions from both rain and cloud water are readily absorbed over the whole surface. Bryophytes are, therefore, closely coupled with the atmosphere and sensitive to changes in concentrations of potentially damaging pollutants.

N deposition :: Marsh earwort

Impact Type: Deposition of pollutant

Key Concerns:

This rare bryophyte (a leafy liverwort), Jamesoniella undulifolia, occurs in wet minerotrophic mires in association with Sphagnum recurvum and Juncus spp. Together with other species in this habitat it is expected to be sensitive to enhanced atmospheric nitrogen deposition, i.e. eutrophication.

Additional Comments:

N deposition :: Atlantic lejeunea

Impact Type: Deposition of pollutant

Key Concerns:

This rare species is listed under the UK Biodiversity Action Plan (BAP) and occurs on shaded basic, dry habitants in humid locations such as atlantic woodlands. It frequently grows in association with other bryophytes such as Frullania spp and other Lejeunia spp, and may be sensitive to atmospheric nitrogen deposition, which would alter the competitive balance between species.

Additional Comments:

N deposition :: Atlantic lejeunea

Impact Type: Deposition of pollutant

Key Concerns:

This rare species is listed under the UK Biodiversity Action Plan (BAP) and occurs on shaded basic, dry habitants in humid locations such as atlantic woodlands. It frequently grows in association with other bryophytes such as Frullania spp and other Lejeunia spp, and may be sensitive to atmospheric nitrogen deposition, which would alter the competitive balance between species.

Additional Comments:

N deposition :: a liverwort

Impact Type: Deposition of pollutant

Key Concerns:

There is evidence that Riccia fluitans actually prefer increased nitrogen inputs. Locally intense nitrogen deposition may therefore favour this species at the expense of other bryophytes (Roelofs 1983).

Additional Comments:

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