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Effects of forestry management and environmental factors on water and light use efficiencies in a cool-temperate mixed forest in northern Japan

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Title: Effects of forestry management and environmental factors on water and light use efficiencies in a cool-temperate mixed forest in northern Japan
Authors: Okada, Keiji Browse this author
Takagi, Kentaro Browse this author →KAKEN DB
Nishida, Yui Browse this author
Keywords: Clearcut
Evapotranspiration
Gross primary production
Larch
Sasa
Issue Date: 10-Oct-2019
Publisher: 日本農業気象学会
Journal Title: Journal of agricultural meteorology
Volume: 75
Issue: 4
Start Page: 183
End Page: 192
Publisher DOI: 10.2480/agrmet.D-19-00006
Abstract: Over a period of 9 years covering both disturbed and undisturbed periods, we evaluated long-term variations in water and light use efficiency (WUE, LUE) in a cool-temperate mixed forest in northern Hokkaido, Japan: our study clarified the relationship of WUE and LUE to environmental and vegetation variables. WUE and LUE markedly decreased after deforestation: they were negatively correlated with the seasonal variations in photosynthetically active radiation (PAR) and water vapor deficit, and LUE increased with the increase in the leaf area index (LAI) coincident with the vegetation recovery. Other environmental and vegetation variables did not explain the changes in the WUE and LUE. The effect of clear-cutting on LUE was well explained by the change in the LAI; on the other hand, vegetation composition (developed forest or young tree seedling with dense undergrowth) had little effect on the magnitude and variation of LUE. In contrast, the change in LAI had little effect on WUE, because WUE is more sensitive to the atmospheric water deficit than it is to vegetation structure.
Rights: © 2019 The Society of Agricultural Meteorology of Japan
Type: article
URI: http://hdl.handle.net/2115/76190
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)

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