Submitted by Eleanor Campbell on Thu, 11/08/2011 - 10:43
Latin name:
Lobaria spp.
Impact Type: Direct exposure to pollutant
Key Concerns:
Lobaria spp., as with other lichen species, are affected by SO2 (Hawksworth & Rose 1970a). Each species within the Lobarion may have a critical level at which point its population will begin to decline (Farmer et al. 1991a). See also Sulphur dioxide / Lichens(general)
Additional Comments:
Also sensitive to acid deposition.
Critical Load/level:
Habitat/ Ecosystem Type | Critical Load/ Level | Status | Reliability | Indication of exceedance | Reference |
---|---|---|---|---|---|
Forests and semi-natural vegetation |
20 µg SO2 m-3 annual mean and half-year(Oct-March) mean |
UNECE, 2004 | quite reliable i.e. the results of some studies are comparable |
Low temperature appears to enhance the negative effects of SO2, and the lower critical level of 15 µg SO2 m-3 is used where the effective temperature sum (ETS) (i.e. the sum of temperatures) above 5oC is below 1000 degree days (d.d) (Ashmore et al., 1994). |
809 |
References:
1992
Ecophysiological effects of acid rain on bryophytes and lichens
Bryophytes and lichens in a changing environment
Species group:
Pollutant: