Impacts of climate change on the tree line
Impacts of climate change on the tree line
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DOI：
10.1093/aob/mcf222
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发表时间：
2002-10-01
期刊：
影响因子：
4.2
通讯作者：
Nagy, L
中科院分区：
文献类型：
--
作者：
Grace, J;Berninger, F;Nagy, L
考虑了气候变化对林线推进的可能影响。随着温度的升高，CO(2)的升高和氮的沉积也会发生变化。如果不进行实验，就不可能弄清它们的影响。然而。光合作用本身似乎是不太可能的，也就是说。直接影响光合作用的因素。影响树木利用光合作用产物的能力的因素，如二氧化碳浓度升高，将与温度等因素同样重要。此外，在5-20摄氏度的温度范围内，温度对生长的限制比对光合作用的限制更严重。如果假设生长和繁殖是由温度控制的，那么可以预测到树线会迅速向前推进，事实上，一些作者已经提供了摄影证据和遥感数据，表明这实际上正在发生。在放牧动物居住的地区，林线的前进将被限制，尽管林线以下的树木的生长当然会大幅增加。(C)2002年《植物学公司年鉴》。
The possible effects of climate change on the advance of the tree line are considered. As temperature, elevated CO(2) and nitrogen deposition co-vary. it is impossible to disentangle their impacts without performing experiments. However. it does seem very unlikely that photosynthesis per se and, by implication. factors that directly influence photosynthesis. such as elevated CO(2), will be as important as those factors which influence the capacity of the tree to use the products of photosynthesis, such as temperature. Moreover, temperature limits growth more severely than it limits photosynthesis over the temperature range 5-20 degreesC. If it is assumed that growth and reproduction are controlled by temperature, a rapid advance of the tree line would be predicted, Indeed, some authors have provided photographic evidence and remotely sensed data that suggest this is, in fact, occurring. In regions inhabited by grazing animals, the advance of the tree line will be curtailed, although growth of trees below the tree line will of course increase substantially. (C) 2002 Annals of Botany Company.