High nitrogen contribution by Gunnera magellanica and nitrogen transfer by mycorrhizas drive an extraordinarily fast primary succession in sub‐Antarctic Chile

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dc.contributor.authorBenavent González, Alberto
dc.contributor.authorRaggio Quílez, José
dc.contributor.authorVillagra, Johana
dc.contributor.authorPintado Valverde, Ana
dc.contributor.authorBlanquer, José Manuel
dc.contributor.authorRozzi, Ricardo
dc.contributor.authorGreen, Thomas George Allan
dc.contributor.authorGarcía Sancho, Leopoldo
dc.date.accessioned2024-01-19T13:10:25Z
dc.date.available2024-01-19T13:10:25Z
dc.date.issued2019-06-24
dc.description.abstractChronosequences at the forefront of retreating glaciers provide information about colonization rates of bare surfaces. In the northern hemisphere, forest development can take centuries, with rates often limited by low nutrient availability. By contrast, in front of the retreating Pia Glacier (Tierra del Fuego, Chile), a Nothofagus forest is in place after only 34 yr of development, while total soil nitrogen (N) increased from near zero to 1.5%, suggesting a strong input of this nutrient. We measured N-fixation rates, carbon fluxes, leaf N and phosphorus contents and leaf δ15N in the dominant plants, including the herb Gunnera magellanica, which is endosymbiotically associated with a cyanobacterium, in order to investigate the role of N-fixing and mycorrhizal symbionts in N-budgets during successional transition. G. magellanica presented some of the highest nitrogenase activities yet reported (potential maximal contribution of 300 kg N ha−1 yr−1). Foliar δ15N results support the framework of a highly efficient N-uptake and transfer system based on mycorrhizas, with c. 80% of N taken up by the mycorrhizas potentially transferred to the host plant. Our results suggest the symbiosis of G. magellanica with cyanobacteria, and trees and shrubs with mycorrhizas, to be the key processes driving this rapid successioncyanobacteria
dc.description.departmentDepto. de Farmacología, Farmacognosia y Botánica
dc.description.facultyFac. de Farmacia
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Economía y Competitividad (España)
dc.description.statuspub
dc.identifier.citationBenavent‐González, A., Raggio, J., Villagra, J., Blanquer, J. M., Pintado, A., Rozzi, R., … & Sancho, L. G. (2019). High nitrogen contribution by gunnera magellanica and nitrogen transfer by mycorrhizas drive an extraordinarily fast primary succession in sub‐antarctic chile. New Phytologist, 223(2), 661-674. https://doi.org/10.1111/nph.15838
dc.identifier.doi10.1111/nph.15838
dc.identifier.essn1469-8137
dc.identifier.issn0028-646X
dc.identifier.officialurlhttps://doi.org/10.1111/nph.15838
dc.identifier.relatedurlhttps://nph.onlinelibrary.wiley.com/doi/10.1111/nph.15838
dc.identifier.urihttps://hdl.handle.net/20.500.14352/94070
dc.issue.number2
dc.journal.titleNew Phytologist
dc.language.isoeng
dc.page.final674
dc.page.initial661
dc.publisherWiley
dc.relation.projectIDinfo:eu-repo/grantAgreement/CTM2015-64728-C2-1-R
dc.relation.projectIDinfo:eu-repo/grantAgreement/CTM2012-38222-CO2-0
dc.rights.accessRightsrestricted access
dc.subject.cdu581.1
dc.subject.cdu58
dc.subject.keywordCyanobacteria
dc.subject.keywordGunnera magellanica
dc.subject.keywordMicorrhizas
dc.subject.keywordNitrogen fixation
dc.subject.keywordNitrogen isotope discrimination
dc.subject.keywordPhotosynthesis
dc.subject.keywordPrimary succession
dc.subject.keywordTierra del Fuego
dc.subject.ucmFisiología vegetal (Biología)
dc.subject.ucmBotánica (Biología)
dc.subject.unesco2417.13 Ecología Vegetal
dc.titleHigh nitrogen contribution by Gunnera magellanica and nitrogen transfer by mycorrhizas drive an extraordinarily fast primary succession in sub‐Antarctic Chile
dc.typejournal article
dc.type.hasVersionVoR
dc.volume.number232
dspace.entity.typePublication
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