Seasonal and site-specific variations in nitrogen fixation in a high arctic area, Ny-Ålesund, Spitsbergen
Nitrogen fixation was measured in different habitats in the area of Ny-Ålesund, Spitsbergen, using the acetylene reduction method on intact soil cores and Nostoc commune growing in macroscopic sheet communities. The samples were incubated both under constant conditions (19 °C and 200 μE∙m −2 ∙s −1 )...
Published in: | Canadian Journal of Microbiology |
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1997
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crcansciencepubl:10.1139/m97-109 2023-12-17T10:25:38+01:00 Seasonal and site-specific variations in nitrogen fixation in a high arctic area, Ny-Ålesund, Spitsbergen Liengen, Turid Olsen, Rolf Arnt 1997 http://dx.doi.org/10.1139/m97-109 http://www.nrcresearchpress.com/doi/pdf/10.1139/m97-109 fr fre Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Microbiology volume 43, issue 8, page 759-769 ISSN 0008-4166 1480-3275 Genetics Molecular Biology Applied Microbiology and Biotechnology General Medicine Immunology Microbiology journal-article 1997 crcansciencepubl https://doi.org/10.1139/m97-109 2023-11-19T13:38:43Z Nitrogen fixation was measured in different habitats in the area of Ny-Ålesund, Spitsbergen, using the acetylene reduction method on intact soil cores and Nostoc commune growing in macroscopic sheet communities. The samples were incubated both under constant conditions (19 °C and 200 μE∙m −2 ∙s −1 ) and under in situ conditions. Cyanobacteria were considered to be the major nitrogen-fixing organisms. The nitrogen fixation rates showed a seasonal variation during the growing season of 1994, with low activities just after the snow melt, increasing until the middle of August and showing a rapid decline after the snow fell on August 29. The soil temperature at the time of sampling showed a positive, linear correlation with the nitrogen fixation activities measured on intact soil cores, whereas the nitrogen fixation activities measured in situ of N. commune showed a positive, linear dependence on the moisture content in the sheets and the incubation temperatures inside the incubation vessels during the experiments. The optimal temperature of the nitrogen fixation activity was about 20 °C, both for N. commune and a Puccinellia salt marsh. The highest nitrogen fixation rate measured in situ was at a patterned ground, which had the highest pH, the highest concentrations of extractable calcium and magnesium, and the highest C:N ratio measured.Key words: nitrogen fixation, cyanobacteria, Nostoc commune, high arctic. Article in Journal/Newspaper Arctic Ny Ålesund Ny-Ålesund Spitsbergen Canadian Science Publishing (via Crossref) Arctic Ny-Ålesund Canadian Journal of Microbiology 43 8 759 769 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
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crcansciencepubl |
language |
French |
topic |
Genetics Molecular Biology Applied Microbiology and Biotechnology General Medicine Immunology Microbiology |
spellingShingle |
Genetics Molecular Biology Applied Microbiology and Biotechnology General Medicine Immunology Microbiology Liengen, Turid Olsen, Rolf Arnt Seasonal and site-specific variations in nitrogen fixation in a high arctic area, Ny-Ålesund, Spitsbergen |
topic_facet |
Genetics Molecular Biology Applied Microbiology and Biotechnology General Medicine Immunology Microbiology |
description |
Nitrogen fixation was measured in different habitats in the area of Ny-Ålesund, Spitsbergen, using the acetylene reduction method on intact soil cores and Nostoc commune growing in macroscopic sheet communities. The samples were incubated both under constant conditions (19 °C and 200 μE∙m −2 ∙s −1 ) and under in situ conditions. Cyanobacteria were considered to be the major nitrogen-fixing organisms. The nitrogen fixation rates showed a seasonal variation during the growing season of 1994, with low activities just after the snow melt, increasing until the middle of August and showing a rapid decline after the snow fell on August 29. The soil temperature at the time of sampling showed a positive, linear correlation with the nitrogen fixation activities measured on intact soil cores, whereas the nitrogen fixation activities measured in situ of N. commune showed a positive, linear dependence on the moisture content in the sheets and the incubation temperatures inside the incubation vessels during the experiments. The optimal temperature of the nitrogen fixation activity was about 20 °C, both for N. commune and a Puccinellia salt marsh. The highest nitrogen fixation rate measured in situ was at a patterned ground, which had the highest pH, the highest concentrations of extractable calcium and magnesium, and the highest C:N ratio measured.Key words: nitrogen fixation, cyanobacteria, Nostoc commune, high arctic. |
format |
Article in Journal/Newspaper |
author |
Liengen, Turid Olsen, Rolf Arnt |
author_facet |
Liengen, Turid Olsen, Rolf Arnt |
author_sort |
Liengen, Turid |
title |
Seasonal and site-specific variations in nitrogen fixation in a high arctic area, Ny-Ålesund, Spitsbergen |
title_short |
Seasonal and site-specific variations in nitrogen fixation in a high arctic area, Ny-Ålesund, Spitsbergen |
title_full |
Seasonal and site-specific variations in nitrogen fixation in a high arctic area, Ny-Ålesund, Spitsbergen |
title_fullStr |
Seasonal and site-specific variations in nitrogen fixation in a high arctic area, Ny-Ålesund, Spitsbergen |
title_full_unstemmed |
Seasonal and site-specific variations in nitrogen fixation in a high arctic area, Ny-Ålesund, Spitsbergen |
title_sort |
seasonal and site-specific variations in nitrogen fixation in a high arctic area, ny-ålesund, spitsbergen |
publisher |
Canadian Science Publishing |
publishDate |
1997 |
url |
http://dx.doi.org/10.1139/m97-109 http://www.nrcresearchpress.com/doi/pdf/10.1139/m97-109 |
geographic |
Arctic Ny-Ålesund |
geographic_facet |
Arctic Ny-Ålesund |
genre |
Arctic Ny Ålesund Ny-Ålesund Spitsbergen |
genre_facet |
Arctic Ny Ålesund Ny-Ålesund Spitsbergen |
op_source |
Canadian Journal of Microbiology volume 43, issue 8, page 759-769 ISSN 0008-4166 1480-3275 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/m97-109 |
container_title |
Canadian Journal of Microbiology |
container_volume |
43 |
container_issue |
8 |
container_start_page |
759 |
op_container_end_page |
769 |
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1785577286768001024 |