Greenhouse gas emissions after a prescribed fire in white birch-dwarf bamboo stands in northern Japan, focusing on the role of charcoal
2011 (English)In: European Journal of Forest Research, ISSN 1612-4669, E-ISSN 1612-4677, Vol. 130, no 6, 1031-1044 p.Article in journal (Refereed) Published
Forest fires affect both carbon (C) and nitrogen (N) cycling in forest ecosystems, and thereby influence the soil-atmosphere exchange of major greenhouse gases (GHGs): carbon dioxide (CO(2)), methane (CH(4)), and nitrous oxide (N(2)O). To determine changes in the soil GHG fluxes following a forest fire, we arranged a low-intensity surface fire in a white birch forest in northern Japan. We established three treatments, having four replications each: a control plot (CON), a burned plot (BURN), and a plot burned with removal of the resulting charcoal (BURN-CHA). Soil GHG fluxes and various properties of the soil were determined on four or five occasions during a period that spanned two growing seasons. We observed increased concentrations of ammonium-N (NH(4)-N) in BURN and BURN-CHA after the fire, while nitrate-N (NO(3)-N) concentration was only increased in BURN-CHA after the fire. The soil CO(2) flux was significantly higher in CON than in BURN or BURN-CHA, but there was no difference in soil CH(4) uptake between the three treatments. Moreover, the N(2)O flux from BURN-CHA soil was slightly greater than in CON or BURN. In BURN-CHA, the soil N(2)O flux peaked in August, but there was no peak in BURN. We found temporal correlations between soil GHG fluxes and soil variables, e.g. soil temperature or NO(3)-N. Our results suggest that environmental changes following fire, including the increased availability of N and the disappearance of the litter layer, have the potential to change soil GHG fluxes. Fire-produced charcoal could be significant in reducing soil N(2)O flux in temperate forests.
Place, publisher, year, edition, pages
2011. Vol. 130, no 6, 1031-1044 p.
Forest fire, Charcoal, GHG emissions, CO(2), CH(4), N(2)O
Ecology Earth and Related Environmental Sciences
IdentifiersURN: urn:nbn:se:umu:diva-51053DOI: 10.1007/s10342-011-0490-8ISI: 000296063100012OAI: oai:DiVA.org:umu-51053DiVA: diva2:474443