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Change in CO2 balance under a series of forestry activities in a cool‐temperate mixed forest with dense undergrowth

Identifieur interne : 001123 ( Istex/Corpus ); précédent : 001122; suivant : 001124

Change in CO2 balance under a series of forestry activities in a cool‐temperate mixed forest with dense undergrowth

Auteurs : Kentaro Takagi ; Karibu Fukuzawa ; Naishen Liang ; Masazumi Kayama ; Mutsumi Nomura ; Hajime Hojyo ; Sadao Sugata ; Hideaki Shibata ; Tatsuya Fukazawa ; Yoshiyuki Takahashi ; Tatsuro Nakaji ; Hiroyuki Oguma ; Masayoshi Mano ; Yukio Akibayashi ; Takeshi Murayama ; Takayoshi Koike ; Kaichiro Sasa ; Yasumi Fujinuma

Source :

RBID : ISTEX:868F739C3AEF315EFAECC7A5BC0EE205F37E7D00

English descriptors

Abstract

To evaluate the effects on CO2 exchange of clearcutting a mixed forest and replacing it with a plantation, 4.5 years of continuous eddy covariance measurements of CO2 fluxes and soil respiration measurements were conducted in a conifer‐broadleaf mixed forest in Hokkaido, Japan. The mixed forest was a weak carbon sink (net ecosystem exchange, −44 g C m−2 yr−1), and it became a large carbon source (569 g C m−2 yr−1) after clearcutting. However, the large emission in the harvest year rapidly decreased in the following 2 years (495 and 153 g C m−2 yr−1, respectively) as the gross primary production (GPP) increased, while the total ecosystem respiration (RE) remained relatively stable. The rapid increase in GPP was attributed to an increase in biomass and photosynthetic activity of Sasa dwarf bamboo, an understory species. Soil respiration increased in the 3 years following clearcutting, in the first year mainly owing to the change in the gap ratio of the forest, and in the following years because of increased root respiration by the bamboo. The ratio of soil respiration to RE increased from 44% in the forest to nearly 100% after clearcutting, and aboveground parts of the vegetation contributed little to the RE although the respiration chamber measurements showed heterogeneous soil condition after clearcutting.

Url:
DOI: 10.1111/j.1365-2486.2008.01795.x

Links to Exploration step

ISTEX:868F739C3AEF315EFAECC7A5BC0EE205F37E7D00

Le document en format XML

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<name sortKey="Akibayashi, Yukio" sort="Akibayashi, Yukio" uniqKey="Akibayashi Y" first="Yukio" last="Akibayashi">Yukio Akibayashi</name>
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<name sortKey="Murayama, Takeshi" sort="Murayama, Takeshi" uniqKey="Murayama T" first="Takeshi" last="Murayama">Takeshi Murayama</name>
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<name sortKey="Shibata, Hideaki" sort="Shibata, Hideaki" uniqKey="Shibata H" first="Hideaki" last="Shibata">Hideaki Shibata</name>
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<name sortKey="Fukazawa, Tatsuya" sort="Fukazawa, Tatsuya" uniqKey="Fukazawa T" first="Tatsuya" last="Fukazawa">Tatsuya Fukazawa</name>
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<name sortKey="Takahashi, Yoshiyuki" sort="Takahashi, Yoshiyuki" uniqKey="Takahashi Y" first="Yoshiyuki" last="Takahashi">Yoshiyuki Takahashi</name>
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<name sortKey="Nakaji, Tatsuro" sort="Nakaji, Tatsuro" uniqKey="Nakaji T" first="Tatsuro" last="Nakaji">Tatsuro Nakaji</name>
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<name sortKey="Oguma, Hiroyuki" sort="Oguma, Hiroyuki" uniqKey="Oguma H" first="Hiroyuki" last="Oguma">Hiroyuki Oguma</name>
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<name sortKey="Akibayashi, Yukio" sort="Akibayashi, Yukio" uniqKey="Akibayashi Y" first="Yukio" last="Akibayashi">Yukio Akibayashi</name>
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<name sortKey="Koike, Takayoshi" sort="Koike, Takayoshi" uniqKey="Koike T" first="Takayoshi" last="Koike">Takayoshi Koike</name>
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<name sortKey="Sasa, Kaichiro" sort="Sasa, Kaichiro" uniqKey="Sasa K" first="Kaichiro" last="Sasa">Kaichiro Sasa</name>
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<name sortKey="Fujinuma, Yasumi" sort="Fujinuma, Yasumi" uniqKey="Fujinuma Y" first="Yasumi" last="Fujinuma">Yasumi Fujinuma</name>
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<term>hybrid larch</term>
<term>net ecosystem exchange</term>
<term>plant area index</term>
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<div type="abstract" xml:lang="en">To evaluate the effects on CO2 exchange of clearcutting a mixed forest and replacing it with a plantation, 4.5 years of continuous eddy covariance measurements of CO2 fluxes and soil respiration measurements were conducted in a conifer‐broadleaf mixed forest in Hokkaido, Japan. The mixed forest was a weak carbon sink (net ecosystem exchange, −44 g C m−2 yr−1), and it became a large carbon source (569 g C m−2 yr−1) after clearcutting. However, the large emission in the harvest year rapidly decreased in the following 2 years (495 and 153 g C m−2 yr−1, respectively) as the gross primary production (GPP) increased, while the total ecosystem respiration (RE) remained relatively stable. The rapid increase in GPP was attributed to an increase in biomass and photosynthetic activity of Sasa dwarf bamboo, an understory species. Soil respiration increased in the 3 years following clearcutting, in the first year mainly owing to the change in the gap ratio of the forest, and in the following years because of increased root respiration by the bamboo. The ratio of soil respiration to RE increased from 44% in the forest to nearly 100% after clearcutting, and aboveground parts of the vegetation contributed little to the RE although the respiration chamber measurements showed heterogeneous soil condition after clearcutting.</div>
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<name>KARIBU FUKUZAWA</name>
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<name>NAISHEN LIANG</name>
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<json:string>Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba 305‐8506, Japan,</json:string>
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<name>MUTSUMI NOMURA</name>
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<name>HAJIME HOJYO</name>
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<json:string>Field Science Center for Northern Biosphere, Hokkaido University, Sapporo 060‐0809, Japan,</json:string>
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<name>SADAO SUGATA</name>
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<json:string>Field Science Center for Northern Biosphere, Hokkaido University, Sapporo 060‐0809, Japan,</json:string>
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<name>HIDEAKI SHIBATA</name>
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<name>TATSUYA FUKAZAWA</name>
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<name>YOSHIYUKI TAKAHASHI</name>
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<json:string>Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba 305‐8506, Japan,</json:string>
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<name>TATSURO NAKAJI</name>
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<name>HIROYUKI OGUMA</name>
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<json:string>Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba 305‐8506, Japan,</json:string>
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<name>MASAYOSHI MANO</name>
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<name>YUKIO AKIBAYASHI</name>
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<json:string>Field Science Center for Northern Biosphere, Hokkaido University, Sapporo 060‐0809, Japan,</json:string>
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<name>TAKESHI MURAYAMA</name>
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<json:string>Research and Development Department, Hokkaido Electric Power Co., Inc., Ebetsu 067‐0033, Japan</json:string>
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<name>TAKAYOSHI KOIKE</name>
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<json:string>Field Science Center for Northern Biosphere, Hokkaido University, Sapporo 060‐0809, Japan,</json:string>
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<name>KAICHIRO SASA</name>
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<json:string>Field Science Center for Northern Biosphere, Hokkaido University, Sapporo 060‐0809, Japan,</json:string>
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<name>YASUMI FUJINUMA</name>
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<json:string>Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba 305‐8506, Japan,</json:string>
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<value>gross primary production</value>
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<value>hybrid larch</value>
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<value>net ecosystem exchange</value>
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<json:string>eng</json:string>
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<value>plant area index</value>
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<json:string>eng</json:string>
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<value>plantation</value>
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<json:string>eng</json:string>
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<value>soil respiration</value>
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<value>succession</value>
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<p>To evaluate the effects on CO2 exchange of clearcutting a mixed forest and replacing it with a plantation, 4.5 years of continuous eddy covariance measurements of CO2 fluxes and soil respiration measurements were conducted in a conifer‐broadleaf mixed forest in Hokkaido, Japan. The mixed forest was a weak carbon sink (net ecosystem exchange, −44 g C m−2 yr−1), and it became a large carbon source (569 g C m−2 yr−1) after clearcutting. However, the large emission in the harvest year rapidly decreased in the following 2 years (495 and 153 g C m−2 yr−1, respectively) as the gross primary production (GPP) increased, while the total ecosystem respiration (RE) remained relatively stable. The rapid increase in GPP was attributed to an increase in biomass and photosynthetic activity of Sasa dwarf bamboo, an understory species. Soil respiration increased in the 3 years following clearcutting, in the first year mainly owing to the change in the gap ratio of the forest, and in the following years because of increased root respiration by the bamboo. The ratio of soil respiration to RE increased from 44% in the forest to nearly 100% after clearcutting, and aboveground parts of the vegetation contributed little to the RE although the respiration chamber measurements showed heterogeneous soil condition after clearcutting.</p>
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<p>To evaluate the effects on CO
<sub>2</sub>
exchange of clearcutting a mixed forest and replacing it with a plantation, 4.5 years of continuous eddy covariance measurements of CO
<sub>2</sub>
fluxes and soil respiration measurements were conducted in a conifer‐broadleaf mixed forest in Hokkaido, Japan. The mixed forest was a weak carbon sink (net ecosystem exchange, −44 g C m
<sup>−2</sup>
 yr
<sup>−1</sup>
), and it became a large carbon source (569 g C m
<sup>−2</sup>
 yr
<sup>−1</sup>
) after clearcutting. However, the large emission in the harvest year rapidly decreased in the following 2 years (495 and 153 g C m
<sup>−2</sup>
 yr
<sup>−1</sup>
, respectively) as the gross primary production (GPP) increased, while the total ecosystem respiration (RE) remained relatively stable. The rapid increase in GPP was attributed to an increase in biomass and photosynthetic activity of
<i>Sasa</i>
dwarf bamboo, an understory species. Soil respiration increased in the 3 years following clearcutting, in the first year mainly owing to the change in the gap ratio of the forest, and in the following years because of increased root respiration by the bamboo. The ratio of soil respiration to RE increased from 44% in the forest to nearly 100% after clearcutting, and aboveground parts of the vegetation contributed little to the RE although the respiration chamber measurements showed heterogeneous soil condition after clearcutting.</p>
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<abstract lang="en">To evaluate the effects on CO2 exchange of clearcutting a mixed forest and replacing it with a plantation, 4.5 years of continuous eddy covariance measurements of CO2 fluxes and soil respiration measurements were conducted in a conifer‐broadleaf mixed forest in Hokkaido, Japan. The mixed forest was a weak carbon sink (net ecosystem exchange, −44 g C m−2 yr−1), and it became a large carbon source (569 g C m−2 yr−1) after clearcutting. However, the large emission in the harvest year rapidly decreased in the following 2 years (495 and 153 g C m−2 yr−1, respectively) as the gross primary production (GPP) increased, while the total ecosystem respiration (RE) remained relatively stable. The rapid increase in GPP was attributed to an increase in biomass and photosynthetic activity of Sasa dwarf bamboo, an understory species. Soil respiration increased in the 3 years following clearcutting, in the first year mainly owing to the change in the gap ratio of the forest, and in the following years because of increased root respiration by the bamboo. The ratio of soil respiration to RE increased from 44% in the forest to nearly 100% after clearcutting, and aboveground parts of the vegetation contributed little to the RE although the respiration chamber measurements showed heterogeneous soil condition after clearcutting.</abstract>
<subject lang="en">
<genre>keywords</genre>
<topic>clearcut harvesting</topic>
<topic>eddy covariance</topic>
<topic>gross primary production</topic>
<topic>hybrid larch</topic>
<topic>net ecosystem exchange</topic>
<topic>plant area index</topic>
<topic>plantation</topic>
<topic>soil respiration</topic>
<topic>succession</topic>
<topic>total ecosystem respiration</topic>
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<title>Global Change Biology</title>
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