Distribution of soil nitrogen and nitrogenase activity in the forefield of a High Arctic receding glacier
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 c...
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ftdoajarticles:oai:doaj.org/article:9247b135bac64e258460374e7173d380 2023-05-15T13:29:33+02:00 Distribution of soil nitrogen and nitrogenase activity in the forefield of a High Arctic receding glacier Thomas Turpin-Jelfs Katerina Michaelides Joshua J. Blacker Liane G. Benning James M. Williams Alexandre M. Anesio 2018-12-01T00:00:00Z https://doi.org/10.1017/aog.2018.35 https://doaj.org/article/9247b135bac64e258460374e7173d380 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0260305518000356/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2018.35 0260-3055 1727-5644 https://doaj.org/article/9247b135bac64e258460374e7173d380 Annals of Glaciology, Vol 59, Pp 87-94 (2018) Arctic glaciology biogeochemistry microbiology moraine Meteorology. Climatology QC851-999 article 2018 ftdoajarticles https://doi.org/10.1017/aog.2018.35 2023-03-12T01:31:55Z 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. Article in Journal/Newspaper Annals of Glaciology Arctic Directory of Open Access Journals: DOAJ Articles Arctic Annals of Glaciology 59 77 87 94 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic glaciology biogeochemistry microbiology moraine Meteorology. Climatology QC851-999 |
spellingShingle |
Arctic glaciology biogeochemistry microbiology moraine Meteorology. Climatology QC851-999 Thomas Turpin-Jelfs Katerina Michaelides Joshua J. Blacker Liane G. Benning James M. Williams Alexandre M. Anesio Distribution of soil nitrogen and nitrogenase activity in the forefield of a High Arctic receding glacier |
topic_facet |
Arctic glaciology biogeochemistry microbiology moraine Meteorology. Climatology QC851-999 |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Thomas Turpin-Jelfs Katerina Michaelides Joshua J. Blacker Liane G. Benning James M. Williams Alexandre M. Anesio |
author_facet |
Thomas Turpin-Jelfs Katerina Michaelides Joshua J. Blacker Liane G. Benning James M. Williams Alexandre M. Anesio |
author_sort |
Thomas Turpin-Jelfs |
title |
Distribution of soil nitrogen and nitrogenase activity in the forefield of a High Arctic receding glacier |
title_short |
Distribution of soil nitrogen and nitrogenase activity in the forefield of a High Arctic receding glacier |
title_full |
Distribution of soil nitrogen and nitrogenase activity in the forefield of a High Arctic receding glacier |
title_fullStr |
Distribution of soil nitrogen and nitrogenase activity in the forefield of a High Arctic receding glacier |
title_full_unstemmed |
Distribution of soil nitrogen and nitrogenase activity in the forefield of a High Arctic receding glacier |
title_sort |
distribution of soil nitrogen and nitrogenase activity in the forefield of a high arctic receding glacier |
publisher |
Cambridge University Press |
publishDate |
2018 |
url |
https://doi.org/10.1017/aog.2018.35 https://doaj.org/article/9247b135bac64e258460374e7173d380 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Annals of Glaciology Arctic |
genre_facet |
Annals of Glaciology Arctic |
op_source |
Annals of Glaciology, Vol 59, Pp 87-94 (2018) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0260305518000356/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2018.35 0260-3055 1727-5644 https://doaj.org/article/9247b135bac64e258460374e7173d380 |
op_doi |
https://doi.org/10.1017/aog.2018.35 |
container_title |
Annals of Glaciology |
container_volume |
59 |
container_issue |
77 |
container_start_page |
87 |
op_container_end_page |
94 |
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1766001194507960320 |