Cargando…

Organic nitrogen steadily increasing in Norwegian rivers draining to the Skagerrak coast

Declining atmospheric nitrogen (N) deposition, through reduction in the direct input of inorganic N, may result in less inorganic N being leached from soils to freshwaters (dissolved inorganic N = DIN). Declining sulphur deposition, through reducing the ionic strength in soil water, increases the so...

Descripción completa

Detalles Bibliográficos
Autores principales: Deininger, A., Kaste, Ø., Frigstad, H., Austnes, K.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7595164/
https://www.ncbi.nlm.nih.gov/pubmed/33116239
http://dx.doi.org/10.1038/s41598-020-75532-5
_version_ 1783601804583370752
author Deininger, A.
Kaste, Ø.
Frigstad, H.
Austnes, K.
author_facet Deininger, A.
Kaste, Ø.
Frigstad, H.
Austnes, K.
author_sort Deininger, A.
collection PubMed
description Declining atmospheric nitrogen (N) deposition, through reduction in the direct input of inorganic N, may result in less inorganic N being leached from soils to freshwaters (dissolved inorganic N = DIN). Declining sulphur deposition, through reducing the ionic strength in soil water, increases the solubility and mobility of organic soil compounds and may result in increased leaching of organically bound N to freshwaters (total organic N = TON). It is unknown to which extent these two independents and opposing trends, i.e. DIN decline versus TON increase, may affect the nutrient balance (load, stoichiometry) of river water draining into coastal zones. By combining long-term atmospheric and riverine monitoring data of the five major Norwegian rivers draining to the Skagerrak coast, we show that over the past 27 years (1990–2017) river water nutrient composition, and specifically N stoichiometry has been steadily shifting from inorganic to organic fractions, with correlations to changes in human pressures (air pollution), but especially climate (precipitation, temperature, discharge). This shift in nutrient quality may have large consequences on the nutrient cycling in both freshwater and coastal ecosystems and illustrates the complex interactions of multiple stressors (here: N deposition, S deposition, and climate change) on aquatic ecosystems.
format Online
Article
Text
id pubmed-7595164
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher Nature Publishing Group UK
record_format MEDLINE/PubMed
spelling pubmed-75951642020-10-29 Organic nitrogen steadily increasing in Norwegian rivers draining to the Skagerrak coast Deininger, A. Kaste, Ø. Frigstad, H. Austnes, K. Sci Rep Article Declining atmospheric nitrogen (N) deposition, through reduction in the direct input of inorganic N, may result in less inorganic N being leached from soils to freshwaters (dissolved inorganic N = DIN). Declining sulphur deposition, through reducing the ionic strength in soil water, increases the solubility and mobility of organic soil compounds and may result in increased leaching of organically bound N to freshwaters (total organic N = TON). It is unknown to which extent these two independents and opposing trends, i.e. DIN decline versus TON increase, may affect the nutrient balance (load, stoichiometry) of river water draining into coastal zones. By combining long-term atmospheric and riverine monitoring data of the five major Norwegian rivers draining to the Skagerrak coast, we show that over the past 27 years (1990–2017) river water nutrient composition, and specifically N stoichiometry has been steadily shifting from inorganic to organic fractions, with correlations to changes in human pressures (air pollution), but especially climate (precipitation, temperature, discharge). This shift in nutrient quality may have large consequences on the nutrient cycling in both freshwater and coastal ecosystems and illustrates the complex interactions of multiple stressors (here: N deposition, S deposition, and climate change) on aquatic ecosystems. Nature Publishing Group UK 2020-10-28 /pmc/articles/PMC7595164/ /pubmed/33116239 http://dx.doi.org/10.1038/s41598-020-75532-5 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Deininger, A.
Kaste, Ø.
Frigstad, H.
Austnes, K.
Organic nitrogen steadily increasing in Norwegian rivers draining to the Skagerrak coast
title Organic nitrogen steadily increasing in Norwegian rivers draining to the Skagerrak coast
title_full Organic nitrogen steadily increasing in Norwegian rivers draining to the Skagerrak coast
title_fullStr Organic nitrogen steadily increasing in Norwegian rivers draining to the Skagerrak coast
title_full_unstemmed Organic nitrogen steadily increasing in Norwegian rivers draining to the Skagerrak coast
title_short Organic nitrogen steadily increasing in Norwegian rivers draining to the Skagerrak coast
title_sort organic nitrogen steadily increasing in norwegian rivers draining to the skagerrak coast
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7595164/
https://www.ncbi.nlm.nih.gov/pubmed/33116239
http://dx.doi.org/10.1038/s41598-020-75532-5
work_keys_str_mv AT deiningera organicnitrogensteadilyincreasinginnorwegianriversdrainingtotheskagerrakcoast
AT kasteø organicnitrogensteadilyincreasinginnorwegianriversdrainingtotheskagerrakcoast
AT frigstadh organicnitrogensteadilyincreasinginnorwegianriversdrainingtotheskagerrakcoast
AT austnesk organicnitrogensteadilyincreasinginnorwegianriversdrainingtotheskagerrakcoast