305 0 60 121 182 244 305 365

Day of year

Fig. 1.9 (Above) The Swiss stone pine (Pinus cembra) growing as a timberline tree in the Alps with the Matterhorn in the background. The stone pine is an example of a tree which shows no signs of suffering a carbohydrate shortage even at its highest locations. (Below) Seasonal course of daily carbon balance and the net cumulative carbon exchange of an experimental Pinus cembra tree. The data were collected between 5 November 2001 and 31 December 2002. (Reproduced with permission from Wieser et al., 2005.)

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