Phenological Variation of Forest Trees
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 wordsBeech Growth Variation Development stages PEI
Unable to display preview. Download preview PDF.
- Brügger, R., Die phänologische Entwicklung von Buche und Fichte, Beobachtungen, Variabilität, Darstellung und deren Nachvollzug in einem Modell, Geographica Bernensia G49,186 pp., 1998.Google Scholar
- Dobbertin, M., Hourly recorded changes in tree stem diameter — Can we distinguish stem growth from contraction and expansion of the bark?, in L’arbre 2000 The Tree, papers presented at the 4th International Symposium on The Tree, edited by M. Labrecque, pp. 263–267, 21–25 August 2000, Montreal, Canada, Isabelle Quentin, 2001.Google Scholar
- Fleckinger, J., Phénologie. Phénologie et Arboriculture Fruitière, Bon Jardinier 1(2, part. C), 362–372, 1965.Google Scholar
- Innes, J. L., J. Böhm, J. B. Bucher, M. Dobbertin, E. Jansen, P. Kull, A. Rigling, L. Walthert, S. Zimmermann, and S. Sanasilva-Bericht, Der Zustand des Schweizer Waldes, Ber. Eidgenöss. Forsch. anst. Wald Schnee Landsch., 339, 60 pp., 1994.Google Scholar
- Linkosalo, T., Analyses of the spring phenology of boreal trees and its response to climate change, Univ. Helsinki, Dep. Forest Ecology Publications, 22, 1–55, 2000.Google Scholar
- Magnuson J. J., C. J. Bowser, A. L. Beckel, The invisible present: Long-term ecological research on lakes, L&S Magazine, 3, University of Wisconsin-Madison, Fall, 1983.Google Scholar
- Thimonier, A., M. Schmitt, P. Cherubini, and N. Kräuchi, Monitoring the Swiss Forests — building a research platform, in Monitoraggio ambientale metodologie ed applicazioni, edited by T. Andofillo and V. Carraro, pp. 121–132, Atti del XXXVIII Corso di Cultura in Ecologia, 2001.Google Scholar
- Vassella A., and R. Brügger, Impulsprojekt für das phänologische Monitoring im Wald und für den Einbezug in die Langfristige Waldökosystemforschung (LWF), SAEFL Report Ökol07/97, 62 pp., Bern, 2001.Google Scholar
- Waggoner, P. E., Modeling Seasonality, in Phenology and Seasonality Modeling, edited by H. Lieth, pp. 301–327, Springer, New York, 1974.Google Scholar