Palacin-Lizarbe, Carlos and Camarero, Lluis and Hallin, Sara and Jones, Christopher and Catalan, Jordi
(2020).
Denitrification rates in lake sediments of mountains affected by high atmospheric nitrogen deposition.
Scientific Reports. 10
, 3003
, 1-9
[Journal article]
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Abstract
During the last decades, atmospheric nitrogen loading in mountain ranges of the Northern Hemisphere has increased substantially, resulting in high nitrate concentrations in many lakes. Yet, how increased nitrogen has affected denitrification, a key process for nitrogen removal, is poorly understood. We measured actual and potential (nitrate and carbon amended) denitrification rates in sediments of several lake types and habitats in the Pyrenees during the ice-free season. Actual denitrification rates ranged from 0 to 9 mu mol N2O m(-2) h(-1) (mean, 1.5 +/- 1.6 SD), whereas potential rates were about 10times higher. The highest actual rates occurred in warmer sediments with more nitrate available in the overlying water. Consequently, littoral habitats showed, on average, 3-fold higher rates than the deep zone. The highest denitrification potentials were found in more productive lakes located at relatively low altitude and small catchments, with warmer sediments, high relative abundance of denitrification nitrite reductase genes, and sulphate-rich waters. We conclude that increased nitrogen deposition has resulted in elevated denitrification rates, but not sufficiently to compensate for the atmospheric nitrogen loading in most of the highly oligotrophic lakes. However, there is potential for high rates, especially in the more productive lakes and landscape features largely govern this.
Authors/Creators: | Palacin-Lizarbe, Carlos and Camarero, Lluis and Hallin, Sara and Jones, Christopher and Catalan, Jordi | ||||||
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Title: | Denitrification rates in lake sediments of mountains affected by high atmospheric nitrogen deposition | ||||||
Year of publishing : | 2020 | ||||||
Volume: | 10 | ||||||
Article number: | 3003 | ||||||
Number of Pages: | 9 | ||||||
Publisher: | Springer Nature | ||||||
ISSN: | 2045-2322 | ||||||
Language: | English | ||||||
Publication Type: | Journal article | ||||||
Article category: | Scientific peer reviewed | ||||||
Version: | Published version | ||||||
Copyright: | Creative Commons: Attribution 4.0 | ||||||
Full Text Status: | Public | ||||||
Subjects: | (A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507) (A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology | ||||||
Keywords: | Reactive nitrogen, Earth-system processes, freshwater ecosystems, mountain lakes | ||||||
URN:NBN: | urn:nbn:se:slu:epsilon-p-106437 | ||||||
Permanent URL: | http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-106437 | ||||||
Additional ID: |
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ID Code: | 17175 | ||||||
Faculty: | NJ - Fakulteten för naturresurser och jordbruksvetenskap | ||||||
Department: | (NL, NJ) > Dept. of Forest Mycology and Plant Pathology (S) > Dept. of Forest Mycology and Plant Pathology | ||||||
Deposited By: | SLUpub Connector | ||||||
Deposited On: | 07 Jul 2020 08:40 | ||||||
Metadata Last Modified: | 16 Aug 2020 18:13 |
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