Phenological Variation of Forest Trees

  • Robert Brügger
  • Matthias Dobbertin
  • Norbert Kräuchi
Part of the Tasks for Vegetation Science book series (TAVS, volume 39)


Observations of Beech trees in Switzerland show relevant differences in the phenology of the single individual. Within the collective of Beech trees, the state of phenological development differs from about one to nineteen days for leaf unfolding, and about six to thirty-six days for leaf coloring. Data on the occurrence of specific phenophases and their absolute differences within a collective are important aids to estimating the potential of climate damage in threshold situations (e.g., frost damage in spring), or the potential of degradation or drift within a population in relation to climate change. Mapping the observed phenological development of a single individual onto daily weather indices also provides a closer understanding of the different indications of natural growth processes. Phenology has established itself as a valuable instrument for monitoring the impact of climate change. Since such data also allows observation of natural development and variations, it is also an extremely useful way of obtaining additional biological information.

Key words

Beech Growth Variation Development stages PEI 


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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Robert Brügger
    • 1
  • Matthias Dobbertin
    • 2
  • Norbert Kräuchi
    • 2
  1. 1.PHENOTOPInstitute of Geography of the University of BerneBerneSwitzerland
  2. 2.WSL Swiss Federal Institute for Forest, Snow, and Landscape ResearchForest Ecosystems and Ecological Risks DivisionBirmensdorf

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