Growth response of clonal norway spruce to 14-month-exposure to ozone and acid mist : Air Pollution and Forest Decline. 14th International Meeting for Specialists in Air Pollution Effects on Forest Ecosystems

1989

3 Abb., 3 Lit. Ang., En, Zfsg. En

Unselbständiges Werk

9091

200034801

Forest decline in Western Europe is supposed to be caused by a complex interaction of air pollutants, climatic and biological factors. The simulataneous existence of several different interpreations of the decline reflects the wide variety of phenomena from site to site as well as the different scientific approaches to these phenomena from site to site as well as the different scientific approaches to these phenomena. Furthermore, there ist the complication that the individual trees within the same canopy differ essentially in their dagree of decline. Main emphasis is put on elevated levels of ozone and acid depositon affecting forest trees of the mountainous regions. (Rehfuess u. Bosch, 1986; Forschungsbeirat 1986). In order to get some decisive information concerning the significance of soil and genetic factors with respect to air pollution effects on forest trees, the susceptibility of different genetic groups of Norway chambers, where different climatic conditions, soil and fumigation factors can be well controlled (Payer et. al., 1986). Growth responses, which developed during 14 months of low level exposure, will be presented and discused.