UK Centre for Ecology & Hydrology, Environment Centre Wales, Deiniol Road, Bangor, Gwynedd, LL57 2UW, UK.
Thünen Institute of Biodiversity, Bundesallee 65, 38116, Braunschweig, Germany.
Environ Sci Pollut Res Int. 2021 Mar;28(12):15090-15098. doi: 10.1007/s11356-020-11724-w. Epub 2020 Nov 23.
New critical levels for ozone based on accumulated flux through stomata (phytotoxic ozone dose, POD), for temperate perennial grassland (semi-)natural vegetation, have been agreed for use within the Convention on Long-Range Transboundary Air Pollution. These were based on data from several experiments conducted under naturally fluctuating environmental conditions that were combined and analysed to give linear dose-response relationships. Dose-response functions and flux-based critical levels were derived based on biomass and flower number. These parameters showed a statistically significant decline with increasing accumulated stomatal ozone flux. The functions and critical levels derived are based on sensitive species and can be used for risk assessments of the damaging effect of ozone on temperate vegetation communities dominated by perennial grassland species. The critical level based on flower number was lower than that for biomass, representing the greater sensitivity of flower number to ozone pollution.
新的基于通过气孔积累通量的臭氧临界值（植物毒性臭氧剂量，POD）已经在《远距离越境空气污染公约》中达成共识，用于温带多年生草原（半）自然植被。这些临界值是基于在自然波动的环境条件下进行的几项实验数据得出的，这些数据经过组合和分析得出了线性剂量-反应关系。基于生物量和花数推导了剂量-反应函数和通量临界值。这些参数随着积累的气孔臭氧通量的增加呈统计学上显著下降。所推导的函数和临界值基于敏感物种，可以用于评估臭氧对以多年生草原物种为主的温带植被群落的破坏性影响的风险。基于花数的临界值低于基于生物量的临界值，代表花数对臭氧污染更敏感。
