期刊
QUATERNARY SCIENCE REVIEWS
卷 23, 期 7-8, 页码 803-810出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.quascirev.2003.06.011
关键词
carbon isotope ratios; intrinsic water-use efficiency; trees; carbon dioxide; atmosphere; Quercus robur; Fagus sylvatica; Pinus sylvestris
资金
- Natural Environment Research Council [NE/B501504/1] Funding Source: researchfish
In order to predict accurately how elevated atmospheric CO2 concentrations will affect the global carbon cycle, it is necessary to know how trees respond to increasing CO2 concentrations. In this paper, we examine the response over the period AD 1895-1994 of three tree species growing across northern Europe to increases in atmospheric CO2 concentrations using parameters derived from stable carbon isotope ratios Of trunk cellulose. Using the isotope data we calculate values of intrinsic water-use efficiency (IWUE) and intercellular CO2 concentrations in the leaf (c(j)). Our results show that trees have responded to higher levels of atmospheric CO2 by increasing IWUE whilst generally maintaining constant c(i) values. However, the IWUE of most of the trees in this study has not continued to rise in line with increasing atmospheric CO2. This behaviour has implications for estimations of future terrestrial carbon storage. (C) 2004 Elsevier Ltd. All rights reserved.
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