|Keywords||marknära ozon, ozon, vårtbjörk, björk, Betlua pendula, open-top chambers, gasutbyte, stomatakonduktans, fotosyntes, tillväxt, tropospheric ozone, ozone, birch, Betula pendula, open-top chambers, gas exchange, stomata conductance, photosynthesis, growth
|Effects of ozone on growth and leaf physiology of birch, Betula pendula.
Background levels of tropospheric ozone in Europe have more than doubled since the end of the 19th century. The critical loads for crops and trees are exceeded in wide parts of Europe, including southern Sweden. It has been shown that tropospheric ozone has a negative effect on forest trees, especially on fast growing species such as birch.
Our birch-ozone project is carried out using open top cambers at Östad field station, and growth as well as gas exchange and other leaf physiology variables are studied. I also plan to do an uptake study, looking at ozone uptake and effects at different air humidities. In humid climates, like our, the ozone uptake through the stomata pores is likely to increase, thereby increasing the harmfull effects.
The project is carried out in collaboration with the Swedish Environmental Research Institute (IVL) and is a part of a MISTRA project called SUFOR (sustainable forestry).