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Quantifying nitrogen-fixation in feather moss carpets of boreal forests
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för fysiologisk botanik. Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Umeå Plant Science Centre (UPSC).ORCID-id: 0000-0002-0536-903X
2002 (Engelska)Ingår i: Nature, ISSN 0028-0836, E-ISSN 1476-4687, Vol. 419, nr 6910, s. 917-920Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Biological nitrogen (N) fixation is the primary source of N within natural ecosystems(1), yet the origin of boreal forest N has remained elusive. The boreal forests of Eurasia and North America lack any significant, widespread symbiotic N-fixing plants(1-6). With the exception of scattered stands of alder in early primary successional forests(7), N-fixation in boreal forests is considered to be extremely limited. Nitrogen-fixation in northern European boreal forests has been estimated(2) at only 0.5 kg Nha(-1) yr(-1); however, organic N is accumulated in these ecosystems at a rate of 3 kg N ha(-1) yr(-1) (ref. 8). Our limited understanding of the origin of boreal N is unacceptable given the extent of the boreal forest region, but predictable given our imperfect knowledge of N-fixation(1,9). Herein we report on a N-fixing symbiosis between a cyanobacterium (Nostoc sp.) and the ubiquitous feather moss, Pleurozium schreberi (Bird) Mitt. that alone fixes between 1.5 and 2.0 kg N ha(-1) yr(-1) in mid- to late-successional forests of northern Scandinavia and Finland. Previous efforts have probably underestimated N-fixation potential in boreal forests.

Ort, förlag, år, upplaga, sidor
2002. Vol. 419, nr 6910, s. 917-920
Identifikatorer
URN: urn:nbn:se:umu:diva-44757DOI: 10.1038/nature01051ISI: 000178909700041OAI: oai:DiVA.org:umu-44757DiVA, id: diva2:424370
Tillgänglig från: 2011-06-17 Skapad: 2011-06-09 Senast uppdaterad: 2018-06-08

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