Abstract
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 Q i, frequency, and coverage factors in the IAP are discussed and the criteria of the Index of Community Vigor are proposed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
