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Canopy carbon budget of Siebold's beech (Fagus crenata) sapling under free air ozone exposure.

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Title: Canopy carbon budget of Siebold's beech (Fagus crenata) sapling under free air ozone exposure.
Authors: Watanabe, Makoto Browse this author →KAKEN DB
Hoshika, Yasutomo Browse this author →KAKEN DB
Inada, Naoki Browse this author
Koike, Takayoshi Browse this author →KAKEN DB
Keywords: Free air ozone exposure
Canopy carbon budget
Light gradient
Siebold's beech
Sensitivity to ozone
Issue Date: Jan-2014
Publisher: Elsevier
Journal Title: Environmental pollution (Barking, Essex : 1987)
Volume: 184
Start Page: 682
End Page: 689
Publisher DOI: 10.1016/j.envpol.2013.04.018
PMID: 23664480
Abstract: To determine the effects of ozone (O3) on the canopy carbon budget, we investigated photosynthesis and respiration of leaves of Siebold's beech saplings under free air O3 exposure (60 nmol mol(-1), during daytime) in relation to the within-canopy light gradient; we then calculated the canopy-level photosynthetic carbon gain (PCG) and respiratory carbon loss (RCL) using a canopy photosynthesis model. Susceptibilities of photosynthesis and respiration to O3 were greater in leaves of upper canopy than in the lower canopy. The canopy net carbon gain (NCG) was reduced by O3 by 12.4% during one growing season. The increased RCL was the main factor for the O3-induced reduction in NCG in late summer, while contributions of the reduced PCG and the increased RCL to the NCG were almost the same in autumn. These results indicate contributions of changes in PCG and RCL under O3 to NCG were different between seasons.
Type: article (author version)
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 小池 孝良

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