Amino acid production exceeds plant nitrogen demand in Siberian tundra
Arctic plant productivity is often limited by low soil N availability. This has been attributed to slow breakdown of N-containing polymers in litter and soil organic matter (SOM) into smaller, available units, and to shallow plant rooting constrained by permafrost and high soil moisture. Using N-15...
Main Authors: | , , , , , , , , , , , , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Bristol : IOP Publishing Ltd.
2018
|
Subjects: | |
Online Access: | https://www.repo.uni-hannover.de/handle/123456789/4967 https://doi.org/10.15488/4924 |
id |
ftunivhannover:oai:www.repo.uni-hannover.de:123456789/4967 |
---|---|
record_format |
openpolar |
spelling |
ftunivhannover:oai:www.repo.uni-hannover.de:123456789/4967 2023-07-16T03:56:02+02:00 Amino acid production exceeds plant nitrogen demand in Siberian tundra Wild, Birgit Alves, Ricardo J. Eloy Barta, Jiri Capek, Petr Gentsch, Norman Guggenberger, Georg Hugelius, Gustaf Knoltsch, Anna Kuhry, Peter Lashchinskiy, Nikolay Mikutta, Robert Palmtag, Juri Prommer, Judith Schnecker, Joerg Shibistova, Olga Takriti, Mounir Urich, Tim Richter, Andreas 2018 https://www.repo.uni-hannover.de/handle/123456789/4967 https://doi.org/10.15488/4924 eng eng Bristol : IOP Publishing Ltd. DOI:https://doi.org/10.1088/1748-9326/aaa4fa http://dx.doi.org/10.15488/4924 https://www.repo.uni-hannover.de/handle/123456789/4967 CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ frei zugänglich Environmental Research Letters 13 (2018), Nr. 3 permafrost tundra protein depolymerization nitrogen mineralization nitrogen limitation plant productivity ddc:550 status-type:publishedVersion doc-type:Article doc-type:Text 2018 ftunivhannover https://doi.org/10.15488/492410.1088/1748-9326/aaa4fa 2023-06-28T10:37:14Z Arctic plant productivity is often limited by low soil N availability. This has been attributed to slow breakdown of N-containing polymers in litter and soil organic matter (SOM) into smaller, available units, and to shallow plant rooting constrained by permafrost and high soil moisture. Using N-15 pool dilution assays, we here quantified gross amino acid and ammonium production rates in 97 active layer samples from four sites across the Siberian Arctic. We found that amino acid production in organic layers alone exceeded literature-based estimates of maximum plant N uptake 17-fold and therefore reject the hypothesis that arctic plant N limitation results from slow SOM breakdown. High microbial N use efficiency in organic layers rather suggests strong competition of microorganisms and plants in the dominant rooting zone. Deeper horizons showed lower amino acid production rates per volume, but also lower microbial N use efficiency. Permafrost thaw together with soil drainage might facilitate deeper plant rooting and uptake of previously inaccessible subsoil N, and thereby promote plant productivity in arctic ecosystems. We conclude that changes in microbial decomposer activity, microbial N utilization and plant root density with soil depth interactively control N availability for plants in the Arctic. Article in Journal/Newspaper Arctic permafrost Tundra Institutional Repository of Leibniz Universität Hannover Arctic |
institution |
Open Polar |
collection |
Institutional Repository of Leibniz Universität Hannover |
op_collection_id |
ftunivhannover |
language |
English |
topic |
permafrost tundra protein depolymerization nitrogen mineralization nitrogen limitation plant productivity ddc:550 |
spellingShingle |
permafrost tundra protein depolymerization nitrogen mineralization nitrogen limitation plant productivity ddc:550 Wild, Birgit Alves, Ricardo J. Eloy Barta, Jiri Capek, Petr Gentsch, Norman Guggenberger, Georg Hugelius, Gustaf Knoltsch, Anna Kuhry, Peter Lashchinskiy, Nikolay Mikutta, Robert Palmtag, Juri Prommer, Judith Schnecker, Joerg Shibistova, Olga Takriti, Mounir Urich, Tim Richter, Andreas Amino acid production exceeds plant nitrogen demand in Siberian tundra |
topic_facet |
permafrost tundra protein depolymerization nitrogen mineralization nitrogen limitation plant productivity ddc:550 |
description |
Arctic plant productivity is often limited by low soil N availability. This has been attributed to slow breakdown of N-containing polymers in litter and soil organic matter (SOM) into smaller, available units, and to shallow plant rooting constrained by permafrost and high soil moisture. Using N-15 pool dilution assays, we here quantified gross amino acid and ammonium production rates in 97 active layer samples from four sites across the Siberian Arctic. We found that amino acid production in organic layers alone exceeded literature-based estimates of maximum plant N uptake 17-fold and therefore reject the hypothesis that arctic plant N limitation results from slow SOM breakdown. High microbial N use efficiency in organic layers rather suggests strong competition of microorganisms and plants in the dominant rooting zone. Deeper horizons showed lower amino acid production rates per volume, but also lower microbial N use efficiency. Permafrost thaw together with soil drainage might facilitate deeper plant rooting and uptake of previously inaccessible subsoil N, and thereby promote plant productivity in arctic ecosystems. We conclude that changes in microbial decomposer activity, microbial N utilization and plant root density with soil depth interactively control N availability for plants in the Arctic. |
format |
Article in Journal/Newspaper |
author |
Wild, Birgit Alves, Ricardo J. Eloy Barta, Jiri Capek, Petr Gentsch, Norman Guggenberger, Georg Hugelius, Gustaf Knoltsch, Anna Kuhry, Peter Lashchinskiy, Nikolay Mikutta, Robert Palmtag, Juri Prommer, Judith Schnecker, Joerg Shibistova, Olga Takriti, Mounir Urich, Tim Richter, Andreas |
author_facet |
Wild, Birgit Alves, Ricardo J. Eloy Barta, Jiri Capek, Petr Gentsch, Norman Guggenberger, Georg Hugelius, Gustaf Knoltsch, Anna Kuhry, Peter Lashchinskiy, Nikolay Mikutta, Robert Palmtag, Juri Prommer, Judith Schnecker, Joerg Shibistova, Olga Takriti, Mounir Urich, Tim Richter, Andreas |
author_sort |
Wild, Birgit |
title |
Amino acid production exceeds plant nitrogen demand in Siberian tundra |
title_short |
Amino acid production exceeds plant nitrogen demand in Siberian tundra |
title_full |
Amino acid production exceeds plant nitrogen demand in Siberian tundra |
title_fullStr |
Amino acid production exceeds plant nitrogen demand in Siberian tundra |
title_full_unstemmed |
Amino acid production exceeds plant nitrogen demand in Siberian tundra |
title_sort |
amino acid production exceeds plant nitrogen demand in siberian tundra |
publisher |
Bristol : IOP Publishing Ltd. |
publishDate |
2018 |
url |
https://www.repo.uni-hannover.de/handle/123456789/4967 https://doi.org/10.15488/4924 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic permafrost Tundra |
genre_facet |
Arctic permafrost Tundra |
op_source |
Environmental Research Letters 13 (2018), Nr. 3 |
op_relation |
DOI:https://doi.org/10.1088/1748-9326/aaa4fa http://dx.doi.org/10.15488/4924 https://www.repo.uni-hannover.de/handle/123456789/4967 |
op_rights |
CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ frei zugänglich |
op_doi |
https://doi.org/10.15488/492410.1088/1748-9326/aaa4fa |
_version_ |
1771542136987058176 |