Denitrification temperature dependence in remote, cold, and N-poor lake sediments
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 r...
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ftuabarcelonapb:oai:ddd.uab.cat:203571 2023-10-25T01:35:47+02:00 Denitrification temperature dependence in remote, cold, and N-poor lake sediments Palacín-Lizarbe, Carlos Camarero, Lluís Catalán, Jordi 2018 application/pdf https://ddd.uab.cat/record/203571 eng eng Ministerio de Economía y Competitividad CGL2010-19737 Ministerio de Economía y Competitividad CGL2013-45348-P Ministerio de Economía y Competitividad CGL2016-80124-C2-1-P Ministerio de Educación y Ciencia FPU12-00644 Water Resources research Vol. 54, Issue 2 (February 2018), p. 1161-1173 https://ddd.uab.cat/record/203571 urn:10.1002/2017WR021680 urn:oai:ddd.uab.cat:203571 urn:scopus_id:85044424246 urn:wos_id:000428474500028 urn:articleid:19447973v54n2p1161 open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/ Nitrogen cycle Activation energy Article 2018 ftuabarcelonapb 2023-09-26T23:50:34Z 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 ± 7 kJ mol−1 (Q10 1.7 ± 0.4). The apparent Ea increased with nitrate (μM) limitation as Ea = 46 + 419 [ urn:x-wiley:00431397:media:wrcr23112:wrcr23112-math-0001]−1. 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. Article in Journal/Newspaper Arctic Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB Arctic Water Resources Research 54 2 1161 1173 |
institution |
Open Polar |
collection |
Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB |
op_collection_id |
ftuabarcelonapb |
language |
English |
topic |
Nitrogen cycle Activation energy |
spellingShingle |
Nitrogen cycle Activation energy Palacín-Lizarbe, Carlos Camarero, Lluís Catalán, Jordi Denitrification temperature dependence in remote, cold, and N-poor lake sediments |
topic_facet |
Nitrogen cycle Activation energy |
description |
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 ± 7 kJ mol−1 (Q10 1.7 ± 0.4). The apparent Ea increased with nitrate (μM) limitation as Ea = 46 + 419 [ urn:x-wiley:00431397:media:wrcr23112:wrcr23112-math-0001]−1. 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. |
format |
Article in Journal/Newspaper |
author |
Palacín-Lizarbe, Carlos Camarero, Lluís Catalán, Jordi |
author_facet |
Palacín-Lizarbe, Carlos Camarero, Lluís Catalán, Jordi |
author_sort |
Palacín-Lizarbe, 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 |
publishDate |
2018 |
url |
https://ddd.uab.cat/record/203571 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Ministerio de Economía y Competitividad CGL2010-19737 Ministerio de Economía y Competitividad CGL2013-45348-P Ministerio de Economía y Competitividad CGL2016-80124-C2-1-P Ministerio de Educación y Ciencia FPU12-00644 Water Resources research Vol. 54, Issue 2 (February 2018), p. 1161-1173 https://ddd.uab.cat/record/203571 urn:10.1002/2017WR021680 urn:oai:ddd.uab.cat:203571 urn:scopus_id:85044424246 urn:wos_id:000428474500028 urn:articleid:19447973v54n2p1161 |
op_rights |
open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/ |
container_title |
Water Resources Research |
container_volume |
54 |
container_issue |
2 |
container_start_page |
1161 |
op_container_end_page |
1173 |
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1780730827850645504 |