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Oecologia

, Volume 35, Issue 2, pp 221–230 | Cite as

Terrestrial mosses as bioindicators of SO2 pollution stress

Synecological analysis and the index of atmospheric purity
  • William E. Winner
  • J. Derek Bewley
Article

Summary

The turf structure of terrestrial mosses was analysed in the understory of white spruce associations along two SO2 stress gradients associated with a single SO2 source. Changes in coverage, turf depth, biomass and percent living moss were followed. SO2 stress initially caused changes in turf structure in the vertical plane (green turf depth, percentage and biomass) whereas changes in the horizontal plane (coverage) were most noticeable in areas of severe stress. The Index of Atmospheric Purity (IAP) reflected SO2 stress only in these latter areas. Intrusion of weeds and increased prominence of subordinate species occurred in lightly stressed areas, but these perturbations were not reflected by the IAP. The effect of Qi, frequency, and coverage factors in the IAP are discussed and the criteria of the Index of Community Vigor are proposed.

Keywords

Biomass Horizontal Plane Vertical Plane Stress Gradient Severe Stress 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1978

Authors and Affiliations

  • William E. Winner
    • 1
  • J. Derek Bewley
    • 1
  1. 1.Department of BiologyUniversity of CalgaryCalgaryCanada

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