Cargando…

Streamwater responses to reduced nitrogen deposition at four small upland catchments in Norway

Reduced emissions of nitrogen (N) in Europe have resulted in decreasing atmospheric deposition since 1990. Long-term data (1988–2017) from four small Norwegian catchments located along gradients in N deposition, rainfall, and organic carbon (C) show different responses to 25–30% reductions in N depo...

Descripción completa

Detalles Bibliográficos
Autores principales: Kaste, Øyvind, Austnes, Kari, de Wit, Heleen A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Netherlands 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7502627/
https://www.ncbi.nlm.nih.gov/pubmed/32535875
http://dx.doi.org/10.1007/s13280-020-01347-3
_version_ 1783584241640013824
author Kaste, Øyvind
Austnes, Kari
de Wit, Heleen A.
author_facet Kaste, Øyvind
Austnes, Kari
de Wit, Heleen A.
author_sort Kaste, Øyvind
collection PubMed
description Reduced emissions of nitrogen (N) in Europe have resulted in decreasing atmospheric deposition since 1990. Long-term data (1988–2017) from four small Norwegian catchments located along gradients in N deposition, rainfall, and organic carbon (C) show different responses to 25–30% reductions in N deposition during the same period. At three sites the decreased N deposition caused reduced leaching of nitrate to surface water, whereas the westernmost site showed no decrease, probably due to thin soils with low C:N ratio, poor vegetation cover and high precipitation. The loss of total N to streamwater constituted 30–50% of the N deposition. Losses via denitrification are unknown but assumed to be low, as a major fraction of the catchments are well-drained. Hence, the study sites seem to continue to accumulate N, presumably mostly in soil organic matter. Although atmospheric N deposition has declined, ambient loads might still exceed long-term sustainable levels in these vulnerable ecosystems.
format Online
Article
Text
id pubmed-7502627
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher Springer Netherlands
record_format MEDLINE/PubMed
spelling pubmed-75026272020-10-01 Streamwater responses to reduced nitrogen deposition at four small upland catchments in Norway Kaste, Øyvind Austnes, Kari de Wit, Heleen A. Ambio Environmental Effects of a Green Bio-Economy Reduced emissions of nitrogen (N) in Europe have resulted in decreasing atmospheric deposition since 1990. Long-term data (1988–2017) from four small Norwegian catchments located along gradients in N deposition, rainfall, and organic carbon (C) show different responses to 25–30% reductions in N deposition during the same period. At three sites the decreased N deposition caused reduced leaching of nitrate to surface water, whereas the westernmost site showed no decrease, probably due to thin soils with low C:N ratio, poor vegetation cover and high precipitation. The loss of total N to streamwater constituted 30–50% of the N deposition. Losses via denitrification are unknown but assumed to be low, as a major fraction of the catchments are well-drained. Hence, the study sites seem to continue to accumulate N, presumably mostly in soil organic matter. Although atmospheric N deposition has declined, ambient loads might still exceed long-term sustainable levels in these vulnerable ecosystems. Springer Netherlands 2020-06-13 2020-11 /pmc/articles/PMC7502627/ /pubmed/32535875 http://dx.doi.org/10.1007/s13280-020-01347-3 Text en © The Author(s) 2020 Open AccessThis 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 Environmental Effects of a Green Bio-Economy
Kaste, Øyvind
Austnes, Kari
de Wit, Heleen A.
Streamwater responses to reduced nitrogen deposition at four small upland catchments in Norway
title Streamwater responses to reduced nitrogen deposition at four small upland catchments in Norway
title_full Streamwater responses to reduced nitrogen deposition at four small upland catchments in Norway
title_fullStr Streamwater responses to reduced nitrogen deposition at four small upland catchments in Norway
title_full_unstemmed Streamwater responses to reduced nitrogen deposition at four small upland catchments in Norway
title_short Streamwater responses to reduced nitrogen deposition at four small upland catchments in Norway
title_sort streamwater responses to reduced nitrogen deposition at four small upland catchments in norway
topic Environmental Effects of a Green Bio-Economy
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7502627/
https://www.ncbi.nlm.nih.gov/pubmed/32535875
http://dx.doi.org/10.1007/s13280-020-01347-3
work_keys_str_mv AT kasteøyvind streamwaterresponsestoreducednitrogendepositionatfoursmalluplandcatchmentsinnorway
AT austneskari streamwaterresponsestoreducednitrogendepositionatfoursmalluplandcatchmentsinnorway
AT dewitheleena streamwaterresponsestoreducednitrogendepositionatfoursmalluplandcatchmentsinnorway