The response of lichen growth to additions of distilled water, rainwater and water from a rock surface

Richard A. Armstrong

Research output: Contribution to journalArticle


Three lichen species were wetted in the field with distilled water, rainwater or water which had run off a rock surafce, during July 1974 to February 1975. The radial growth rate of Parmelia glabratula ssp. fuliginosa was not influenced by the wetting treatments. The radial growth rate of P. conspersa with the distilled water was greater than the control, rainwater and runoff treatments. The radial growth rate of Physcia orbicularis was lower with rainwater and runoff treatmentss than the control and distilled water treatment. These results may be explained by the effect of wetting on the carbon balance of the lichens and by the influence of water chemistry.
Original languageEnglish
Pages (from-to)373-376
Number of pages4
JournalNew Phytologist
Issue number2
Publication statusPublished - Sep 1977



  • lichen
  • radial growth rate
  • Parmelia glabratula spp. fuliginosa
  • Parmelia conspersa
  • Physcia orbicularis
  • carbon balance
  • water chemistry

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