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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Agriculture / Faculty of Agriculture >
Peer-reviewed Journal Articles, etc >
Carbon dioxide exchange of a larch forest after a typhoon disturbance
| Title: | Carbon dioxide exchange of a larch forest after a typhoon disturbance |
| Authors: | Sano, Tomohito Browse this author | | Hirano, Takashi Browse this author | | Liang, Naishen Browse this author | | Hirata, Ryuichi Browse this author | | Fujinuma, Yasumi Browse this author |
| Keywords: | Automated chamber system | | Carbon dioxide | | Disturbance | | Larch forest | | Red raspberry | | Typhoon |
| Issue Date: | 15-Dec-2010 |
| Publisher: | Elsevier |
| Journal Title: | Forest Ecology and Management |
| Volume: | 260 |
| Issue: | 12 |
| Start Page: | 2214 |
| End Page: | 2223 |
| Publisher DOI: | 10.1016/j.foreco.2010.09.026 |
| Abstract: | A typhoon event catastrophically destroyed a 45-year-old Japanese larch plantation in southern Hokkaido, northern Japan in September 2004, and about 90% of trees were blown down. Vegetation was measured to investigate its regeneration process and CO2 flux, or net ecosystem production (NEP), was measured in 2006–2008 using an automated chamber system to investigate the effects of typhoon disturbance on the ecosystem carbon balance. Annual maximum aboveground biomass (AGB) increased from 2.7 Mg ha−1 in 2006 to 4.0 Mg ha−1 in 2007, whereas no change occurred in annual maximum leaf area index (LAI), which was 3.7 m2 m−2 in 2006 and 3.9 m2 m−2 in 2007. Red raspberry (Rubus idaeus) had become dominant within 2 years after the typhoon disturbance, and came to account for about 60% and 50% of AGB and LAI, respectively. In comparison with CO2 fluxes measured by the eddy covariance technique in 2001–2003, for 4.5 months during the growing season, the sum of gross primary production (GPP) decreased on average by 739 gC m−2 (64%) after the disturbance, whereas ecosystem respiration (RE) decreased by 501 gC m−2 (51%). As a result, NEP decreased from 159 ± 57 gC m−2 to −80 ± 30 gC m−2, which shows that the ecosystem shifted from a carbon sink to a source. Seasonal variation in RE was strongly correlated to soil temperature. The interannual variation in the seasonal trend of RE was small. Light-saturated GPP (Pmax) decreased from 30–45 μmol m−2 s−1 to 8–12 μmol m−2 s−1 during the summer season through the disturbance because of large reduction in LAI. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/45748 |
| 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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Submitter: 平野 高司
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