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    P.O.Box 65 (Viikinkaari 1)

    00014 University of Helsinki


Organisation profile

Organisation Profile


We investigate the winter ecology and overwintering strategies of plants. Much of the work is focused on the seasonality of plants in a warming winter climate, with special emphasis on the role of snow in northern ecosystems. We have applied a range of methods, such as overwintering experiments under diverse climatic conditions in the field (reciprocal overwintering experiments), snow manipulations, growth chamber experiments, and ecophysiological modelling.


 Our recent topics include:

  • photosynthetic activity of plants outside growing season and under snow
  • effects of microclimate on arctic-alpine plants
  • effects of winter climate on annual plants
  • invasive species in a warming winter climate
  • winter dormancy and phenology of plants in a warming climate
  • interactions between canopy, snow and vegetation

Group leader: Dr. Helena Åström

Fields of Science

  • 1181 Ecology, evolutionary biology
  • plant ecology, winter ecology
  • 1183 Plant biology, microbiology, virology

International and National Collaboration

Publications and projects within past five years.