NOx :: Ferns (general)

Latin name: 

Impact Type: Direct exposure to pollutant

Key Concerns:

Studies by Ashenden et al. (1990) and Lawrence & Ashenden (1993) have shown that direct exposure to NO2 may affect the growth and reproduction of fern species. It is possible that damage to some species of fern can occur at concentrations of NO2 which are low relative to concentrations known to cause damage in higher plants.

Additional Comments:

Ashenden et al (1990), set a critical level for ferns at 60 nl l-1 (ppb) NO2 in air. Reduction in shoot growth and reproduction was observed. 

Critical Load/level: 
Critical Load/ Level

No estimate available

Ashenden, T.W.; Bell, S.A.; Rafarel, C.R. 1990 Effects of nitrogen dioxide pollution on the growth of 3 fern species. Environmental Pollution 66 301-308
Lawrence, P.A.; Ashenden, T.W. 1993 Effects of acidic gases and mists on the reproductive capability of 3 fern species Environmental Pollution 79 267-270
Species group: 

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