Ozone-induced stomatal sluggishness changes carbon and water balance of temperate deciduous forests.
Ozone-induced stomatal sluggishness changes carbon and water balance of temperate deciduous forests.
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DOI：
10.1038/srep09871
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发表时间：
2015-05-06
影响因子：
4.6
通讯作者：
Paoletti E
中科院分区：
文献类型：
--
作者：
Hoshika Y;Katata G;Deushi M;Watanabe M;Koike T;Paoletti E
自 19 世纪以来，北半球对流层臭氧浓度增加了 60-100%。臭氧的植物毒性会损害森林生产力。此外，臭氧通过促进气孔关闭和损害气孔控制来影响气孔功能。臭氧引起的气孔迟缓，即气孔对波动刺激的反应延迟，有可能改变森林的碳和水平衡。这种影响必须包含在臭氧风险评估模型中。在这里，我们通过结合详细的多层地表模型和全球大气化学模型，研究了 2006-2009 年北半球温带落叶林碳同化和蒸腾的臭氧引起的气孔停滞的影响。对臭氧 FACE（自由空气控制暴露）实验结果的分析表明，臭氧引起的气孔迟缓可以纳入基于光合作用-气孔耦合模型中使用的简单参数（gmin，最小气孔导度）的建模中。我们的模拟表明，当考虑臭氧引起的气孔迟缓时，臭氧会降低温带落叶森林的水利用效率，即净二氧化碳同化与蒸腾作用的比率，最高可达20%，而当忽略气孔迟缓时，最多仅降低5%。
Tropospheric ozone concentrations have increased by 60–100% in the Northern Hemisphere since the 19th century. The phytotoxic nature of ozone can impair forest productivity. In addition, ozone affects stomatal functions, by both favoring stomatal closure and impairing stomatal control. Ozone-induced stomatal sluggishness, i.e., a delay in stomatal responses to fluctuating stimuli, has the potential to change the carbon and water balance of forests. This effect has to be included in models for ozone risk assessment. Here we examine the effects of ozone-induced stomatal sluggishness on carbon assimilation and transpiration of temperate deciduous forests in the Northern Hemisphere in 2006-2009 by combining a detailed multi-layer land surface model and a global atmospheric chemistry model. An analysis of results by ozone FACE (Free-Air Controlled Exposure) experiments suggested that ozone-induced stomatal sluggishness can be incorporated into modelling based on a simple parameter (gmin, minimum stomatal conductance) which is used in the coupled photosynthesis-stomatal model. Our simulation showed that ozone can decrease water use efficiency, i.e., the ratio of net CO2 assimilation to transpiration, of temperate deciduous forests up to 20% when ozone-induced stomatal sluggishness is considered, and up to only 5% when the stomatal sluggishness is neglected.
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影响因子：
1.9
作者：
Ebita, Ayataka;Kobayashi, Shinya;Ishimizu, Takahisa
通讯作者：
Ishimizu, Takahisa
影响因子：
64.8
作者：
Keenan, Trevor F.;Hollinger, David Y.;Richardson, Andrew D.
通讯作者：
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影响因子：
7.3
作者：
Noormets, A;Sôber, A;Karnosky, DF
通讯作者：
Karnosky, DF
影响因子：
11.6
作者：
Sun, Ge;McLaughlin, Samuel B.;Pederson, Neil
通讯作者：
Pederson, Neil
影响因子：
4.9
作者：
Lombardozzi, D.;Sparks, J. P.;Bonan, G.
通讯作者：
Bonan, G.