Il limite della vegetazione arborea: struttura, dinamica e risposte alle variazioni climatiche
Il 11/03/2014 ore 11.00 - 12.30
CNR ISE - Istituto per lo Studio degli Ecosistemi
Largo Tonolli 50, 28922 Verbania Pallanza
tel. 0323 518300 - www.ise.cnr.it/verbania
Seminario di Marco Caccianiga, Dipartimento di Bioscienze, Università degli Studi di Milano
The position of the treeline (the uppermost or northernmost limit of tree growth form) represents a well-known climatic boundary, and a powerful proxy for past and present climate variations. Growth season temperatures are widely considered the main factor affecting the position of both latitudinal and altitudinal treelines, However, the ongoing global temperature increase is not causing a global advance of treelines worldwide thus emphasizing the complexity of climate-treeline relationship; moreover, the different species composition at the treeline (driven by bioclimatic, historical or biogeographic factors) could result in different responses to climatic forcing.
The seminar will show some case studies of different altitudinal and latitudinal treelines. An interdisciplinary approach, including floristic analysis, dendrochronology, paleoecology and soil science, was used. The analysed treelines showed contrasting responses to past and present climatic fluctuations as a function of regional climate, species composition and historical events. The knowledge of the response of this important ecological boundary is of great importance for the modelling of ecosystem dynamics in a changing climate.
Organizzato da:
CNR ISE - Istituto per lo Studio degli Ecosistemi
Referente organizzativo:
Diego Fontaneto
CNR ISE - Istituto per lo Studio degli Ecosistemi
0323 518300
Modalità di accesso: ingresso libero
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