Research assistant and teacher in systematic botany and plant ecology 1953-1963
Professor in plant ecology 1963-1993
Other scientific commissions:
Engaged by the Swedish Environmental Board1972-1979 to conduct major research programs on the effects of the acid rain and in physical planning.
Member of the Swedish Natural Science Research Council l983-1989.
Member of the Swedish Council for Forestry and Agricultural Research 1984-1990.
Member of the Swedish Council for Planning and Coordination of Research 1986-1989.
Editor-in-Chief for the journal "Oikos" 1990-2003.
Member of the Royal Physiographic Society in Lund since 1970.
Member of the Royal Swedish Academy of Sciences since 1983.
Present direction of research:
Carbon balance, biogeochemistry and vegetation changes in Sphagnum peatlands.
Inoculations with 14C and the C/N-quotient in the peat are used to estimate both present and past productivities, decay losses and carbon accumulation rates in different types of Sphagnum-dominated peatlands and its variation in relation to climatic and edaphic conditions. This line of research has been supported with special studies on the interaction between vascular plants and Sphagnum mosses in the competition for light and mineral nutrients. In the studies on changes in the mire vegetation I have compared old and present vegetation records and aerial photographs. All studies have been performed either in southern Sweden or in the Abisko area in northernmost Sweden.