Neue Daten zum Monitoring alpiner Pflanzen im Engadin

C A Burga, Esther Frei, Romedi Reinalter, Gian-Reto Walther
2007
During the summers of 2004 and 2005, the mountain flora of Piz Languard (3262 m a.s.l.) near Pontresina (Switzerland) was monitored and compared to the inventories from the years 1905, 1907, 1941, 1985 and 2003. The occurrence of flowering plants above 3000 m has been recorded with a standard deviation of ± 10 m. Trends, detected in earlier years, in the upward shift of alpine plants on Piz Languard has again been confirmed. Whereas 37 plant species have shown a clear upward shift during the
more » ... shift during the last decades, there are 36 more or less stationary species and 12 species have moved to slightly lower altitudes. The highest amount of upward shift has been show by the following plant species: Lotus alpinus, Arnica montana, Adeno-styles leucophylla, Artemisia umbelliformis, Vaccinium vitisidaea, Salix serpyllifolia and Lloydia serotina. Since ca. 1985 there has been an accelerated upward shift of approximately 10 m per decade. Furthermore, in the wider region of Bernina and Lower Engadine, the uppermost occur-rence of flowering plants and ferns has been recorded with the help of historical data from the following years: 1573-2001, 1982-2002 and 2003-2005. In the tributary valley of Tasna, 213 plant species from a total of 980 show an upward shift of more than a 100 m during the last decades. Abstract During the summers of 2004 and 2005, the mountain flora of Piz Languard (3262 m a.s.l.) near Pontresina (Switzerland) was monitored and compared to the inventories from the years 1905, 1907, 1941, 1985 and 2003. The occurrence of flowering plants above 3000 m has been recorded with a standard deviation of ± 10 m. Trends, detected in earlier years, in the upward shift of alpine plants on Piz Languard has again been confirmed. Whereas 37 plant species have shown a clear upward shift during the last decades, there are 36 more or less stationary species and 12 species have moved to slightly lower altitudes. The highest amount of upward shift has been show by the following plant species: Lotus alpinus, Arnica montana, Adenostyles leucophylla, Artemisia umbelliformis, Vaccinium vitis-idaea, Salix serpyllifolia and Lloydia serotina. Since ca. 1985 there has been an accelerated upward shift of approximately 10 m per decade. Furthermore, in the wider region of Bernina and Lower Engadine, the uppermost occurrence of flowering plants and ferns has been recorded with the help of historical data from the following years: 1573-2001, 1982-2002 and 2003-2005. In the tributary valley of Tasna, 213 plant species from a total of 980 show an upward shift of more than a 100 m during the last decades.
doi:10.5167/uzh-78053 fatcat:yslx33vtrncl3mzgxo4thqvc54