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Contrasted effects of increased N and CO2 supply on two keystone species in peatland restoration and implications for global change
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolutionary Biology, Plant Ecology.
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2002 (English)In: Journal of Ecology, ISSN 0022-0477, E-ISSN 1365-2745, Vol. 90, no 3, 529-533 p.Article in journal (Refereed) Published
Abstract [en]

1  Significant areas of temperate bogs have been damaged by peat harvesting but may regenerate. These secondary mires, if well managed, may act as strong C sinks, regulate hydrology and buffer regional climate.2 The potential effects of bog regeneration will, however, depend on the successful establishment of the principal peat formers –Sphagnum mosses. The influence of hydrology and microclimate on Sphagnum re-growth is well studied but effects of elevated CO2 and N deposition are not known.3 We carried out two in-situ experiments in a cutover bog during three growing seasons in which we raised either CO2 (to 560 p.p.m.) or N (by adding NH4NO3, 3 g m−2 year−1). The two treatments had contrasting effects on competition between the initial coloniser Polytrichum strictum (favoured by high N) and the later coloniser Sphagnum fallax (favoured by high CO2).

4  Such changes may have important consequences for bog regeneration and hence for carbon sequestration in cutover bogs, with potential feedback on regional hydrological and climatic processes.

Place, publisher, year, edition, pages
2002. Vol. 90, no 3, 529-533 p.
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Natural Sciences
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URN: urn:nbn:se:uu:diva-43936DOI: 10.1046/j.1365-2745.2002.00679.xOAI: oai:DiVA.org:uu-43936DiVA: diva2:71841
Available from: 2008-10-17 Created: 2008-10-17 Last updated: 2017-12-05Bibliographically approved

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Rydin, Håkan

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