Articles | Volume 14, issue 5
https://doi.org/10.5194/bg-14-1111-2017
https://doi.org/10.5194/bg-14-1111-2017
Research article
 | 
09 Mar 2017
Research article |  | 09 Mar 2017

Symbiosis revisited: phosphorus and acid buffering stimulate N2 fixation but not Sphagnum growth

Eva van den Elzen, Martine A. R. Kox, Sarah F. Harpenslager, Geert Hensgens, Christian Fritz, Mike S. M. Jetten, Katharina F. Ettwig, and Leon P. M. Lamers

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Cited articles

Aerts, R., Wallen, B., and Malmer, N.: Growth-limiting nutrients in Sphagnum-dominated bogs subject to low and high atmospheric nitrogen supply, J. Ecol., 80, 131–140, 1992.
Aerts, R., Verhoeven, J. T. A., and Whigham, D. F.: Plant-mediated controls on nutrient cycling in temperate fens and bogs, Ecology, 80, 2170–2181, 1999.
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Andersen, R., Chapman, S. J., and Artz, R. R. E.: Microbial communities in natural and disturbed peatlands: a review, Soil Biol. Biochem., 57, 979–994, 2013.
Bay, G., Nahar, N., Oubre, M., Whitehouse, M. J., Wardle, D. A., Zackrisson, O., Nilsson, M.-C., and Rasmussen, U.: Boreal feather mosses secrete chemical signals to gain nitrogen, New Phytol., 200, 54–60, 2013.
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Short summary
Peatlands are important because they sequester large amounts of carbon, for which nitrogen is needed. In peatlands dominated by peat mosses, atmospheric nitrogen is fixed by associated microorganisms. We here show for the first time experimentally that phosphorus availability and acid buffering, both showing large variations among peatlands, can explain the strong differences reported for nitrogen fixation. This improves our understanding of peatland functioning in relation to global change.
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