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Roots and associated fungi drive long-term carbon sequestration in boreal forest
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2013 (English)In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 339, no 6127, p. 1615-1618Article in journal (Refereed) Published
Abstract [en]

Boreal forest soils function as a terrestrial net sink in the global carbon cycle. The prevailing dogma has focused on aboveground plant litter as a principal source of soil organic matter. Using C-14 bomb-carbon modeling, we show that 50 to 70% of stored carbon in a chronosequence of boreal forested islands derives from roots and root-associated microorganisms. Fungal biomarkers indicate impaired degradation and preservation of fungal residues in late successional forests. Furthermore, 454 pyrosequencing of molecular barcodes, in conjunction with stable isotope analyses, highlights root-associated fungi as important regulators of ecosystem carbon dynamics. Our results suggest an alternative mechanism for the accumulation of organic matter in boreal forests during succession in the long-term absence of disturbance.

Place, publisher, year, edition, pages
2013. Vol. 339, no 6127, p. 1615-1618
National Category
Biological Sciences
Research subject
Biologi med ekologisk inriktning
Identifiers
URN: urn:nbn:se:oru:diva-28903DOI: 10.1126/science.1231923ISI: 000316731600051OAI: oai:DiVA.org:oru-28903DiVA, id: diva2:619685
Available from: 2013-05-06 Created: 2013-05-03 Last updated: 2017-12-06Bibliographically approved

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Ekblad, Alf
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