期刊
ECOLOGICAL MODELLING
卷 220, 期 11, 页码 1419-1424出版社
ELSEVIER
DOI: 10.1016/j.ecolmodel.2009.03.004
关键词
Abies veitchii Lindl.; Carbon use efficiency; Forest stand development; Gross primary production; Leaf mass ratio; Net primary production
类别
资金
- Ministry of Education, Science, Sport and Culture, Japan [19580170]
- Sumitomo Foundation [073010]
- Grants-in-Aid for Scientific Research [19580170] Funding Source: KAKEN
Changes in carbon use efficiency (CUE), which is defined as the ratio of net primary production (NPP) to gross primary production (GPP), were analyzed for Abies veitchii Lindl. forests with respect to stand development by developing a simple mathematical model incorporating data on physiological variables and leaf mass ratio. A decrease in CUE with stand development was successfully expressed as a function of stand biomass (y) based on the following three assumptions: (1) a power-law relationship between mean respiration and mean individual tree mass, (2) a power-functional relationship between mean gross primary production and mean individual tree mass, and (3) self-thinning relationship between stand biomass and density. Based on this model, a parameter of CUE-y relationship was defined, and it was clarified that CUE decrease with stand development is caused not by the ratio of specific respiration rate to specific gross photosynthetic rate, but by leaf mass ratio. Since CUE is high in young forests, helpful information on selecting woody species when planting seedlings was provided from the viewpoints of reducing CO2 in the atmosphere and global warming. (C) 2009 Elsevier B.V. All rights reserved
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