Diazotrophy in Alluvial Meadows of Subarctic River Systems

Simple item page
dc.contributor.authorDeLuca, Thomas H.
dc.contributor.authorZackrisson, Olle
dc.contributor.authorBergman, Ingela
dc.contributor.authorDiez, Beatriz
dc.contributor.authorBergman, Birgitta
dc.date.accessioned2025-01-24T00:07:37Z
dc.date.available2025-01-24T00:07:37Z
dc.date.issued2013
dc.description.abstractThere is currently limited understanding of the contribution of biological N-2 fixation (diazotrophy) to the N budget of large river systems. This natural source of N in boreal river systems may partially explain the sustained productivity of river floodplains in Northern Europe where winter fodder was harvested for centuries without fertilizer amendments. In much of the world, anthropogenic pollution and river regulation have nearly eliminated opportunities to study natural processes that shaped early nutrient dynamics of large river systems; however, pristine conditions in northern Fennoscandia allow for the retrospective evaluation of key biochemical processes of historical significance. We investigated biological N-2 fixation (diazotrophy) as a potential source of nitrogen fertility at 71 independent floodplain sites along 10 rivers and conducted seasonal and intensive analyses at a subset of these sites. Biological N-2 fixation occurred in all floodplains, averaged 24.5 kg N ha(-1) yr(-1) and was down regulated from over 60 kg N ha(-1) yr(-1) to 0 kg N ha(-1) yr(-1) by river N pollution. A diversity of N-2-fixing cyanobacteria was found to colonize surface detritus in the floodplains. The data provide evidence for N-2 fixation to be a fundamental source of new N that may have sustained fertility at alluvial sites along subarctic rivers. Such data may have implications for the interpretation of ancient agricultural development and the design of contemporary low-input agroecosystems.
dc.fuente.origenWOS
dc.identifier.doi10.1371/journal.pone.0077342
dc.identifier.issn1932-6203
dc.identifier.urihttps://doi.org/10.1371/journal.pone.0077342
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/101926
dc.identifier.wosidWOS:000326656200011
dc.issue.numero11
dc.language.isoen
dc.revistaPlos one
dc.rightsacceso restringido
dc.subject.ods14 Life Below Water
dc.subject.ods15 Life on Land
dc.subject.ods06 Clean Water and Sanitation
dc.subject.odspa14 Vida submarina
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.subject.odspa06 Agua limpia y saneamiento
dc.titleDiazotrophy in Alluvial Meadows of Subarctic River Systems
dc.typeartículo
dc.volumen8
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas