Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 370683
Title Elevated CO2 does not favor a fungal decomposition pathway
Author(s) Groenigen, K.J. van; Six, J.; Harris, D.; Kessel, C. van
Source Soil Biology and Biochemistry 39 (2007)8. - ISSN 0038-0717 - p. 2168 - 2172.
Department(s) Earth System Science
Publication type Refereed Article in a scientific journal
Publication year 2007
Keyword(s) atmospheric co2 - grassland soils - amino-sugars - nitrogen - carbon - responses - agroecosystems - limitation - bacterial
Abstract We examined the effect of prolonged elevated CO2 on the concentration of fungal- and bacterial-derived compounds by quantifying the soil contents of the amino sugars glucosamine, galactosamine and muramic acid. Soil samples were collected from three different terrestrial ecosystems (grassland, an aspen forest and a soybean/corn agroecosystem) that were exposed to elevated CO2 under FACE conditions for 3¿10 years. Amino sugars were extracted from bulk soil and analyzed by gas chromatography. Elevated CO2 did not affect the size or composition of the amino sugar pool in any of the systems. However, high rates of fertilizer N applications decreased the amount of fungal-derived residues in the grassland system. We suggest that these results are caused by a decrease in saprophytic fungi following high N additions. Furthermore, our findings imply that the contribution of saprophytic fungi and bacteria to SOM in the studied ecosystems is largely unaffected by elevated CO2.
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