Abstract
Current-year seedlings of beech, ash, Norway spruce and Scots pine were exposed during one growing season to different, but moderate, ozone (O3) scenarios representative for Switzerland (50, 85, 100% ambient, 50% ambient+30 nl l−1) in open-top chambers (OTCs) and to ambient O3 concentrations in the field. Biomass significantly decreased with increasing O3 dose in all species except for spruce. Losses of 25.5% (ash), 17.4% (beech), 9.9% (Scots pine) were found per 10 μl l−1 h accumulated O3 exposure over a threshold concentration of 40 nl l−1 during daylight hours (AOT40). Ratios of root/shoot biomass (RSR) also significantly decreased with increasing AOT40 levels in beech and ash, but not in Norway spruce and Scots pine. The data show that the deciduous species beech and ash were more susceptible to O3 with respect to RSR and biomass than the coniferous species Norway spruce and Scots pine.
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.
