Denitrification Temperature Dependence in Remote, Cold, and N-Poor Lake Sediments
Este artículo contiene 13 páginas, 4 figuras, 2 tablas. The reservoir size and pathway rates of the nitrogen (N) cycle have been deeply modified by the human enhancement of N fixation, atmospheric emissions, and climate warming. Denitrification (DEN) transforms nitrate into nitrogenous gas and thus...
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ftcsic:oai:digital.csic.es:10261/163300 2024-02-11T10:01:29+01:00 Denitrification Temperature Dependence in Remote, Cold, and N-Poor Lake Sediments Palacín, Carlos Camarero, Lluís Catalán, Jordi 2018 http://hdl.handle.net/10261/163300 https://doi.org/10.1002/2017WR021680 en eng American Geophysical Union Palacín, Carlos; Catalán, Jordi; 2020; Denitrification rates in mountain lake sediments [Dataset]; Dryad; Version 7; https://doi.org/10.5061/dryad.j6q573n95 https://doi.org/10.1002/2017WR021680 Sí Water Resources Research 54 : 1161-1173 (2018) 0043-1397 http://hdl.handle.net/10261/163300 doi:10.1002/2017WR021680 none artículo http://purl.org/coar/resource_type/c_6501 2018 ftcsic https://doi.org/10.1002/2017WR02168010.5061/dryad.j6q573n95 2024-01-16T10:29:42Z Este artículo contiene 13 páginas, 4 figuras, 2 tablas. The reservoir size and pathway rates of the nitrogen (N) cycle have been deeply modified by the human enhancement of N fixation, atmospheric emissions, and climate warming. Denitrification (DEN) transforms nitrate into nitrogenous gas and thus removes reactive nitrogen (Nr) back to the atmospheric reservoir. There is still a rather limited knowledge of the denitrification rates and their temperature dependence across ecosystems; particularly, for the abundant cold and N-poor freshwater systems (e.g., Arctic and mountain lakes). We experimentally investigated the denitrification rates of mountain lake sediments by manipulating nitrate concentration and temperature on field collected cores. DEN rates were nitrate limited in field conditions and showed a large potential for an immediate DEN increase with both warming and higher Nr load. The estimated activation energy (Ea) for denitrification at nitrate saturation was 46 6 7 kJ mol21 (Q10 1.7 6 0.4). The apparent Ea increased with nitrate (lM) limitation as Ea 5 46 1 419 [NO– 3] 21 . Accordingly, we suggest that climate warming may have a synergistic effect with N emission reduction to readjusting the N cycle. Changes of nitrate availability might be more relevant than direct temperature effects on denitrification. The Spanish Government provided funds through the research grants of the Ministerio de Economia y Competitividad: NitroPir (CGL2010– 19737), Lacus (CGL2013–45348-P), and Transfer (CGL2016–80124-C2-1-P) and a predoctoral fellowship to C.P.-L. (FPU12–00644). Peer reviewed Article in Journal/Newspaper Arctic Digital.CSIC (Spanish National Research Council) Arctic |
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Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
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ftcsic |
language |
English |
description |
Este artículo contiene 13 páginas, 4 figuras, 2 tablas. The reservoir size and pathway rates of the nitrogen (N) cycle have been deeply modified by the human enhancement of N fixation, atmospheric emissions, and climate warming. Denitrification (DEN) transforms nitrate into nitrogenous gas and thus removes reactive nitrogen (Nr) back to the atmospheric reservoir. There is still a rather limited knowledge of the denitrification rates and their temperature dependence across ecosystems; particularly, for the abundant cold and N-poor freshwater systems (e.g., Arctic and mountain lakes). We experimentally investigated the denitrification rates of mountain lake sediments by manipulating nitrate concentration and temperature on field collected cores. DEN rates were nitrate limited in field conditions and showed a large potential for an immediate DEN increase with both warming and higher Nr load. The estimated activation energy (Ea) for denitrification at nitrate saturation was 46 6 7 kJ mol21 (Q10 1.7 6 0.4). The apparent Ea increased with nitrate (lM) limitation as Ea 5 46 1 419 [NO– 3] 21 . Accordingly, we suggest that climate warming may have a synergistic effect with N emission reduction to readjusting the N cycle. Changes of nitrate availability might be more relevant than direct temperature effects on denitrification. The Spanish Government provided funds through the research grants of the Ministerio de Economia y Competitividad: NitroPir (CGL2010– 19737), Lacus (CGL2013–45348-P), and Transfer (CGL2016–80124-C2-1-P) and a predoctoral fellowship to C.P.-L. (FPU12–00644). Peer reviewed |
format |
Article in Journal/Newspaper |
author |
Palacín, Carlos Camarero, Lluís Catalán, Jordi |
spellingShingle |
Palacín, Carlos Camarero, Lluís Catalán, Jordi Denitrification Temperature Dependence in Remote, Cold, and N-Poor Lake Sediments |
author_facet |
Palacín, Carlos Camarero, Lluís Catalán, Jordi |
author_sort |
Palacín, Carlos |
title |
Denitrification Temperature Dependence in Remote, Cold, and N-Poor Lake Sediments |
title_short |
Denitrification Temperature Dependence in Remote, Cold, and N-Poor Lake Sediments |
title_full |
Denitrification Temperature Dependence in Remote, Cold, and N-Poor Lake Sediments |
title_fullStr |
Denitrification Temperature Dependence in Remote, Cold, and N-Poor Lake Sediments |
title_full_unstemmed |
Denitrification Temperature Dependence in Remote, Cold, and N-Poor Lake Sediments |
title_sort |
denitrification temperature dependence in remote, cold, and n-poor lake sediments |
publisher |
American Geophysical Union |
publishDate |
2018 |
url |
http://hdl.handle.net/10261/163300 https://doi.org/10.1002/2017WR021680 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Palacín, Carlos; Catalán, Jordi; 2020; Denitrification rates in mountain lake sediments [Dataset]; Dryad; Version 7; https://doi.org/10.5061/dryad.j6q573n95 https://doi.org/10.1002/2017WR021680 Sí Water Resources Research 54 : 1161-1173 (2018) 0043-1397 http://hdl.handle.net/10261/163300 doi:10.1002/2017WR021680 |
op_rights |
none |
op_doi |
https://doi.org/10.1002/2017WR02168010.5061/dryad.j6q573n95 |
_version_ |
1790597295201320960 |