META-ANALYSIS OF MODEL PARAMETERS
META-ANALYSIS OF MODEL PARAMETERS
复制标题
模型参数的元分析
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
P. Jarvis
中科院分区：
文献类型：
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作者：
B. Medlyn;M. Broadmeadow;F. Badeck;D. Pury;C. Barton;R. Ceulemans;P. Angelis;M. Forstreuter;E. Jach;S. Jackson;S. Kellomäki;E. Laitat;M. Marek;S. Philippot;A. Rey;J. Strassemeyer;K. Laitinen;R. Liozon;B. Portier;P. Roberntz;Kai;P. Jarvis
在本章中，[CO2]升高对模型参数的影响进行了研究，通过应用统计技术，称为荟萃分析的数据汇编在ECOCRAFT数据库。特别研究了三个过程：光合作用，气孔导度和暗呼吸。光合作用数据的荟萃分析表明，光合作用模型的参数下调[CO2]升高。这种下调，在一般情况下，与叶氮含量的减少，光合参数和叶氮含量之间的关系是不变的升高[CO2]在大多数实验中。气孔导度数据的荟萃分析表明，总体而言，气孔导度降低[CO2]升高，虽然落叶树种的影响比针叶树强得多。气孔导度对环境条件的敏感性在高浓度[CO2]下生长不变。气孔功能常用的球浆果模型的参数也没有改变。呼吸数据的荟萃分析显示，[CO2]升高对呼吸速率没有一致的影响。每单位质量的呼吸和组织氮含量之间有很强的关系，这是不变的增长在升高[CO2]。总的来说，我们得出结论，这些生理过程的当前模型足以描述所观察到的反应升高[CO2]。
In this chapter, the effects of elevated [CO2] on model parameters are studied by applying statistical techniques known as meta-analysis to the data compiled in the ECOCRAFT database. Three processes were studied in particular: photosynthesis, stomatal conductance, and dark respiration. The meta-analysis of photosynthesis data indicated that parameters of the photosynthesis model were down-regulated in elevated [CO2]. This down-regulation was, in general, related to a reduction in leaf nitrogen content; the relationship between photosynthetic parameters and leaf nitrogen content was unchanged under elevated [CO2] in most experiments. The meta-analysis of stomatal conductance data indicated that, overall, stomatal conductance was reduced in elevated [CO2], although the effects were much stronger for deciduous species than for coniferous. Sensitivity of stomatal conductance to environmental conditions was unchanged by growth in elevated [CO2]. Parameters of the commonly used Ball-Berry model of stomatal function were also unchanged. The meta-analysis of respiration data showed no consistent effect of elevated [CO2] on respiration rates. There was a strong relationship between respiration per unit mass and tissue nitrogen content, which was unchanged by growth in elevated [CO2]. Overall, we conclude that current models of these physiological processes are adequate to describe the observed responses to elevated [CO2].