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Volume 16 - February 1984

Contents

Page 2 of 3

Research Article

  • Quantification of Branch Dwelling Lichens for the Detection of Air Pollution Impact

  • P. A. Addison
  • Published online by Cambridge University Press:
    28 March 2007, pp. 297-304

  • In the Athabasca Oil Sands area of Alberta, a study was carried out to test a lichen community transplant technique and to determine the influence of oil sands extraction and processing emissions on lichen cover of transplanted communities. Measurement errors of a photographic technique for the determination of lichen cover were dependent upon lichen species but were not correlated to lichen cover. When lichen covers were small therefore, relative errors were very large. Changes in cover of naturally occurring lichen communities on black spruce branches were not significant over a four-year period. Lichen communities transplanted under jack pine and white spruce trees had cover changes with time not different from naturally occurring communities even over a period of years.

    Significant (P<0.001) cover reductions of some lichen groups occurred on transplanted branches under white spruce within 8–3 km of a pollution source. Evernia, Cetraria, and Bryoria groups were reduced whereas Hypogymnia showed no response over a 3 year measurement period. Reductions in lichen cover were greater than the demonstrated precision of the technique.

Meeting Report

Research Article

Short Communication

Book Reviews

Meeting Report

Research Article

Book Reviews

Short Communications

Book Reviews

Front matter

  • LIC volume 16 issue 3 Cover and Front matter

  • Published online by Cambridge University Press:
    28 March 2007, pp. f1-f2
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Short Communications

Book Reviews

Back matter

  • LIC volume 16 issue 3 Cover and Back matter

  • Published online by Cambridge University Press:
    28 March 2007, pp. b1-b2
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Book Reviews

Page 2 of 3