dc.contributor.author
Turpin-Jelfs, Thomas
dc.contributor.author
Michaelides, Katerina
dc.contributor.author
Blacker, Joshua J.
dc.contributor.author
Benning, Liane G.
dc.contributor.author
Williams, James M.
dc.contributor.author
Anesio, Alexandre Magno
dc.date.accessioned
2019-07-09T07:50:27Z
dc.date.available
2019-07-09T07:50:27Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/24984
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-2744
dc.description.abstract
Glaciers retreating in response to climate warming are progressively exposing primary mineral substrates to surface conditions. As primary production is constrained by nitrogen (N) availability in these emerging ecosystems, improving our understanding of how N accumulates with soil formation is of critical concern. In this study, we quantified how the distribution and speciation of N, as well as rates of free-living biological N fixation (BNF), change along a 2000-year chronosequence of soil development in a High Arctic glacier forefield. Our results show the soil N pool increases with time since exposure and that the rate at which it accumulates is influenced by soil texture. Further, all N increases were organically bound in soils which had been ice-free for 0–50 years. This is indicative of N limitation and should promote BNF. Using the acetylene reduction assay technique, we demonstrated that microbially mediated inputs of N only occurred in soils which had been ice-free for 0 and 3 years, and that potential rates of BNF declined with increased N availability. Thus, BNF only supports N accumulation in young soils. When considering that glacier forefields are projected to become more expansive, this study has implications for understanding how ice-free ecosystems will become productive over time.
en
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
Arctic glaciology
en
dc.subject
biogeochemistry
en
dc.subject
microbiology
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften
dc.title
Distribution of soil nitrogen and nitrogenase activity in the forefield of a High Arctic receding glacier
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.doi
10.1017/aog.2018.35
dcterms.bibliographicCitation.journaltitle
Annals of Glaciology
dcterms.bibliographicCitation.number
77
dcterms.bibliographicCitation.pagestart
87
dcterms.bibliographicCitation.pageend
94
dcterms.bibliographicCitation.volume
59
dcterms.bibliographicCitation.url
https://doi.org/10.1017/aog.2018.35
refubium.affiliation
Geowissenschaften
refubium.note.author
Der Artikel wurde in einer reinen Open-Access-Zeitschrift publiziert.
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.issn
0260-3055
dcterms.isPartOf.eissn
1727-5644