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:
The more widespread related Dwarf Willow (S. herbacea) has disappeared from a number of sites in the northern Pennines, an area subject to high N deposition (Perring and Walters 1976). S. lanata is cultivated as a garden shrub where the impact of N is negligible suggesting damage is probably indirect from abiotic causes.
| Habitat/ Ecosystem Type | Eunis Code | Critical Load/ Level | Status | Reliability | Indication of exceedance | Reference |
|---|---|---|---|---|---|---|
| Moss and lichen dominated mountain summits | E4.2 |
5-10 kg N ha-1 year-1 |
UNECE 2010 - Noordwijkerhout workshop | quite reliable |
Effects upon bryophytes or lichens. |
472 |