Effects of manganese addition on carbon release from forest floor horizons
(2011) Canadian Journal of Forest Research — Vol. 41, n° 3, p. 643-648 (2011)
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- Abstract
- Lignin concentration in organic residues largely controls their decomposition. Mn2+ may well play a key role in ligninolysis because it is a cofactor of manganese peroxidase, an enzyme of the lignin-degrading system. This study aims to investigate the effects of Mn2+ addition on forest floor horizon decomposition during laboratory incubation. Therefore, we sampled two distinct forest floors from European beech (Fagus sylvatica L.) stands: a mor and a moder. Lignin and Mn concentrations in forest floor upper layer were significantly larger in moder than in mor. Three horizons from each forest floor were separately incubated with or without Mn2+ addition (250 mg Mnkg dry matter–1) and the release of both CO2 and dissolved organic C was measured. The dissolved organic C release was not impacted by the Mn2+ addition, while a clear increase in CO2 release from specific horizons was observed. Our data suggest that the impact of the Mn2+ addition depends on (i) the forest floor type and on (ii) the organic matter decomposition stage.
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Trum, F., Titeux, H., Cornélis, J.-T., & Delvaux, B. (2011). Effects of manganese addition on carbon release from forest floor horizons. Canadian Journal of Forest Research, 41(3), 643-648. https://doi.org/10.1139/X10-224 (Original work published 2011)