Influence of forest disturbance on CO_2, CH_4 and N_2O fluxes from larch forest soil in the permafrost taiga region of eastern Siberia(Environment)

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概要

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• To evaluate the effect of increasing forest disturbances on greenhouse gas budgets in a taiga forest in eastern Siberia, CO_2, CH_4 and N_2O fluxes from the soils were measured during the growing season in intact, burnt and clear-felled larch forests (4-5 years after the disturbance). Soil temperature and moisture were higher at the two disturbed sites than at the forest site. A 64-72% decrease in the Q_<10> value of soil CO_2 flux from the disturbed sites compared with the forest site (5.92) suggested a reduction in root respiration and a dominance of organic matter decomposition at the disturbed sites. However, the cumulative CO_2 emissions (May-August) were not significantly different among the sites (2.81-2.90MgCha^<-1> per 3 months). This might be because decreased larch root respiration was compensated for by increased organic matter decomposition resulting from an increase in the temperature and root respiration of invading vegetation at the disturbed sites. The CH_4 uptake (kgCha^<-1> per 4 months [May-September]) at the burnt site was significantly higher (-0.15) than the uptake at the forest (-0.045) and clear-felled sites (0.0027). Although there were no significant differences among the sites, N_2O emission (kgNha^<-1> per 4 months) was slightly lower at the burnt site (0.013) and higher at the clear-felled site (0.068) than at the forest site (0.038). This different influence of burning and tree felling on CH_4 and N_2O fluxes might result from changes in the physical and chemical properties of the soil with respect to forest fire.

• 社団法人日本土壌肥料学会の論文

著者

• Desyatkin Roman

  Institute of Biological Problems of Cryolithzone, Russia Academy of Science

• Desyatkin Roman

  Ibpc

• Desyatkin Roman

  Institute For Biological Problems Of Cryolithozone Siberian Branch Russian Academy Of Science

• Roman Desyatkin

  Ibpc Sb Ras

• Desyatkin Roman

  Institute For Biological Problems Of Cryolithozone Russian Academy Of Science

• Alexey Desyatkin

  北大院農

• Lopez C.m.

  Institute Of Low Temperature Science Hokkaido University:united Graduate School Of Agricultural Scie

• Takakai Fumiaki

  北大院農

• Hatano Ryusuke

  北大院農

• Hatano Ryusuke

  Soil Science Laboratory Graduate School Of Agriculture Hokkaido University

• TAKAKAI Fumiaki

  Faculty of Bioresource Sciences, Akita Prefectural University

• HATANO Ryusuke

  Research Faculty of Agriculture, Hokkaido University

• DESYATKIN Alexey

  Institute for Biological Problems of Cryolithozone, Siberian Branch, Russian Academy of Science

• FEDOROV Alexander

  Permafrost Institute, Siberian Branch, Russian Academy of Science

• Hatano Ryusuke

  Research Faculty Of Agriculture Hokkaido University

• Alexey Desyatkin

  Soil Science Laboratory Graduate School Of Agriculture Hokkaido University

• Takakai Fumiaki

  Faculty Of Bioresource Sciences Akita Prefectural University

• Fedorov Alexander

  Permafrost Institute Siberian Branch Russian Academy Of Science

• Lopez C.

  Institute Of Low Temperature Science Hokkaido University

• Takakai Fumiaki

  Akita Prefectural Univ. Akita

• Desyatkin Alexey

  Soil Science Laboratory Graduate School Of Agriculture Hokkaido University

• Hatano Ryusuke

  北大 大学院

• Desyatkin Alexey

  Institute for Biological Problems of Cryolithozone, Siberian Branch of the Russian Academy of Sciences, Yakutsk, Sakha, Russia

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