Vascular Plants

N deposition :: Woolly willow

Impact Type: Deposition of pollutant

Key Concerns:

Woolly willow (Salix lanata) is a shrub willow of wet mountain rocks. It is a UK BAP species which may be sensitive to N deposition. Increasing the N content of this shrub will undoubtably increase the likelihood of damage from herbivores, pests and pathogens. Willows are very sensitive to infection by rusts.

Additional Comments:

N deposition :: Scottish small-reed

Impact Type: Deposition of pollutant

Key Concerns:

Scottish small-reed (Calamagrostis scotica) is very rare endemic of bogs in north Caithness (Biodiversity Steering Group 1995). No research has been published on this plant, however it is expected to be sensitive to any factors affecting the bog habitat, including atmospheric N deposition.

Additional Comments:

There is no published research on the impact of pollution on this species. 

N deposition :: Norwegian mugwort

Impact Type: Deposition of pollutant

Key Concerns:

Norwegian mugwort (Artemisia norvegica) is a globally rare arctic/alpine plant found on only three mountains in NW Scotland, where it occurs in Racomitrium heath. As a component of this sensitive habitat it is expected to be sensitive to N deposition (Biodiversity Steering Group 1995).

Additional Comments:

N deposition :: Marsh clubmoss

Impact Type: Deposition of pollutant

Key Concerns:

Marsh clubmoss, Lycopodium inundatum, is a prostate perennial species of wet heaths, found often on bare peaty soil, and occasionally on the margins of lochs. It has a very localised distribution, reproduces by sporangia and is thought to be vulnerable to excess atmospheric Nitrogen deposition via both indirect and direct effects (Biodiversity Steering Group 1995).

Additional Comments:

N deposition :: Killarney fern

Impact Type: Deposition of pollutant

Key Concerns:

Killarny fern (Trichomanes speciosum) is a rare filmy fern listed in the UKBAP that occurs on damp shaded rocks in the splash zones of waterfalls. It is thought that they are likely to be sensitive to nitrogen deposition. However, there is no published research on the effect of air pollution on Trichomanes sp, so it is uncertain how this fern compares in sensitivity to bryophytes. As a first approximation, a similar sensitivity might be assumed.

Additional Comments:

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