The Sensitivity of Moss-Associated Nitrogen Fixation towards Repeated Nitrogen Input.
Nitrogen (N2) fixation is a major source of available N in ecosystems that receive low amounts of atmospheric N deposition. In boreal forest and subarctic tundra, the feather moss Hylocomium splendens is colonized by N2 fixing cyanobacteria that could contribute fundamentally to increase the N pool...
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ftdoajarticles:oai:doaj.org/article:87d4a96fd5cc4bac8b7318c8ee5a3f4a 2023-05-15T18:28:31+02:00 The Sensitivity of Moss-Associated Nitrogen Fixation towards Repeated Nitrogen Input. Kathrin Rousk Anders Michelsen 2016-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0146655 https://doaj.org/article/87d4a96fd5cc4bac8b7318c8ee5a3f4a EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC4712137?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0146655 https://doaj.org/article/87d4a96fd5cc4bac8b7318c8ee5a3f4a PLoS ONE, Vol 11, Iss 1, p e0146655 (2016) Medicine R Science Q article 2016 ftdoajarticles https://doi.org/10.1371/journal.pone.0146655 2022-12-31T03:36:05Z Nitrogen (N2) fixation is a major source of available N in ecosystems that receive low amounts of atmospheric N deposition. In boreal forest and subarctic tundra, the feather moss Hylocomium splendens is colonized by N2 fixing cyanobacteria that could contribute fundamentally to increase the N pool in these ecosystems. However, N2 fixation in mosses is inhibited by N input. Although this has been shown previously, the ability of N2 fixation to grow less sensitive towards repeated, increased N inputs remains unknown. Here, we tested if N2 fixation in H. splendens can recover from increased N input depending on the N load (0, 5, 20, 80, 320 kg N ha(-1) yr(-1)) after a period of N deprivation, and if sensitivity towards increased N input can decrease after repeated N additions. Nitrogen fixation in the moss was inhibited by the highest N addition, but was promoted by adding 5 kg N ha(-1) yr(-1), and increased in all treatments during a short period of N deprivation. The sensitivity of N2 fixation towards repeated N additions seem to decrease in the 20 and 80 kg N additions, but increased in the highest N addition (320 kg N ha(-1) yr(-1)). Recovery of N in leachate samples increased with increasing N loads, suggesting low retention capabilities of mosses if N input is above 5 kg N ha(-1) yr(-1). Our results demonstrate that the sensitivity towards repeated N additions is likely to decrease if N input does not exceed a certain threshold. Article in Journal/Newspaper Subarctic Tundra Directory of Open Access Journals: DOAJ Articles PLOS ONE 11 1 e0146655 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
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Medicine R Science Q Kathrin Rousk Anders Michelsen The Sensitivity of Moss-Associated Nitrogen Fixation towards Repeated Nitrogen Input. |
topic_facet |
Medicine R Science Q |
description |
Nitrogen (N2) fixation is a major source of available N in ecosystems that receive low amounts of atmospheric N deposition. In boreal forest and subarctic tundra, the feather moss Hylocomium splendens is colonized by N2 fixing cyanobacteria that could contribute fundamentally to increase the N pool in these ecosystems. However, N2 fixation in mosses is inhibited by N input. Although this has been shown previously, the ability of N2 fixation to grow less sensitive towards repeated, increased N inputs remains unknown. Here, we tested if N2 fixation in H. splendens can recover from increased N input depending on the N load (0, 5, 20, 80, 320 kg N ha(-1) yr(-1)) after a period of N deprivation, and if sensitivity towards increased N input can decrease after repeated N additions. Nitrogen fixation in the moss was inhibited by the highest N addition, but was promoted by adding 5 kg N ha(-1) yr(-1), and increased in all treatments during a short period of N deprivation. The sensitivity of N2 fixation towards repeated N additions seem to decrease in the 20 and 80 kg N additions, but increased in the highest N addition (320 kg N ha(-1) yr(-1)). Recovery of N in leachate samples increased with increasing N loads, suggesting low retention capabilities of mosses if N input is above 5 kg N ha(-1) yr(-1). Our results demonstrate that the sensitivity towards repeated N additions is likely to decrease if N input does not exceed a certain threshold. |
format |
Article in Journal/Newspaper |
author |
Kathrin Rousk Anders Michelsen |
author_facet |
Kathrin Rousk Anders Michelsen |
author_sort |
Kathrin Rousk |
title |
The Sensitivity of Moss-Associated Nitrogen Fixation towards Repeated Nitrogen Input. |
title_short |
The Sensitivity of Moss-Associated Nitrogen Fixation towards Repeated Nitrogen Input. |
title_full |
The Sensitivity of Moss-Associated Nitrogen Fixation towards Repeated Nitrogen Input. |
title_fullStr |
The Sensitivity of Moss-Associated Nitrogen Fixation towards Repeated Nitrogen Input. |
title_full_unstemmed |
The Sensitivity of Moss-Associated Nitrogen Fixation towards Repeated Nitrogen Input. |
title_sort |
sensitivity of moss-associated nitrogen fixation towards repeated nitrogen input. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2016 |
url |
https://doi.org/10.1371/journal.pone.0146655 https://doaj.org/article/87d4a96fd5cc4bac8b7318c8ee5a3f4a |
genre |
Subarctic Tundra |
genre_facet |
Subarctic Tundra |
op_source |
PLoS ONE, Vol 11, Iss 1, p e0146655 (2016) |
op_relation |
http://europepmc.org/articles/PMC4712137?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0146655 https://doaj.org/article/87d4a96fd5cc4bac8b7318c8ee5a3f4a |
op_doi |
https://doi.org/10.1371/journal.pone.0146655 |
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PLOS ONE |
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11 |
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1 |
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e0146655 |
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