Carbon balance in a cool–temperate deciduous forest in northern Japan: seasonal and interannual variations, and environmental controls of its annual balance
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- Yukio Yasuda
- Tohoku Research Center, Forestry and Forest Products Research Institute, 92–25 Nabeyashiki Shimokuriyagawa, Morioka, Iwate 020-0123, Japan
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- Takeshi Saito
- Tohoku Research Center, Forestry and Forest Products Research Institute, 92–25 Nabeyashiki Shimokuriyagawa, Morioka, Iwate 020-0123, Japan
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- Daisuke Hoshino
- Tohoku Research Center, Forestry and Forest Products Research Institute, 92–25 Nabeyashiki Shimokuriyagawa, Morioka, Iwate 020-0123, Japan
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- Kenji Ono
- Tohoku Research Center, Forestry and Forest Products Research Institute, 92–25 Nabeyashiki Shimokuriyagawa, Morioka, Iwate 020-0123, Japan
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- Yoshikazu Ohtani
- Department of Meteorological Environment, Forestry and Forest Products Research Institute, Tsukuba, Japan
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- Yasuko Mizoguchi
- Hokkaido Research Center, Forestry and Forest Products Research Institute, Sapparo, Japan
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- Takeshi Morisawa
- Tohoku Research Center, Forestry and Forest Products Research Institute, 92–25 Nabeyashiki Shimokuriyagawa, Morioka, Iwate 020-0123, Japan
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説明
We monitored variation in seasonal and annual net ecosystem production (NEP), gross primary production (GPP), and ecosystem respiration (R E) based on 7-year eddy covariance measurements above a cool–temperate deciduous broad-leaved forest (Japanese beech forest). The 7-year means (±SD) of annual NEP, GPP, and R E were 312 ± 64, 1250 ± 62, and 938 ± 36 g C m−2 year−1, respectively. Variation in NEP was much larger than variation in GPP and R E. During the growing season, the main factor controlling carbon balance was air temperature; variation in seasonal integrated NEP was regulated by accumulated air temperature (degree-day) with a significant negative correlation, whereas the seasonal ratio of R E to GPP was correlated positively with accumulated air temperature. Because the deviation of seasonal NEP was also significantly correlated with seasonal R E/GPP, NEP was controlled by R E/GPP, depending on air temperature during the growing season. Seasonal R E in the defoliation and snow seasons was also important for evaluating the annual carbon balance, because the total number of days in the two seasons was quite large owing to a long snowy winter. In the defoliation and snow seasons, we found defoliation season length was a major factor determining seasonal integrated R E, illustrating the positive correlation between R E and defoliation season length. The major factors controlling interannual variations in forest carbon balance are discussed.
収録刊行物
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- Journal of Forest Research
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Journal of Forest Research 17 (3), 253-267, 2012-06
Informa UK Limited
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詳細情報 詳細情報について
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- CRID
- 1363388845577057792
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- ISSN
- 16107403
- 13416979
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- データソース種別
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- Crossref
- OpenAIRE