Nutrient variations in boreal and subarctic Swedish rivers : Landscape control of land–sea fluxes
We examined the hypothesis that the extent of vegetation cover governs the fluxes of nutrients from boreal and subarctic river catchments to the sea. Fluxes of total organic carbon (TOC) and dissolved inorganic nitrogen, phosphorus, and dissolved silicate (DIN, DIP, and DSi, respectively) are descri...
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Linköpings universitet, Tema vatten i natur och samhälle
2004
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ftlinkoepinguniv:oai:DiVA.org:liu-12551 2023-05-15T17:45:07+02:00 Nutrient variations in boreal and subarctic Swedish rivers : Landscape control of land–sea fluxes Humborg, Christoph Smedberg, Erik Blomqvist, Sven Mörth, Carl-Magnus Brink, Jenni Rahm, Lars Danielsson, Åsa Sahlberg, Jörgen 2004 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-12551 eng eng Linköpings universitet, Tema vatten i natur och samhälle Linköpings universitet, Filosofiska fakulteten Department of Systems Ecology, Stockholm University Department of Geology and Geochemistry, Stockholm University Swedish Meteorological and Hydrological Institute Limnology and Oceanography, 0024-3590, 2004, 49:5, s. 1871-1883 http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-12551 info:eu-repo/semantics/openAccess Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser Article in journal info:eu-repo/semantics/article text 2004 ftlinkoepinguniv 2022-05-01T08:19:40Z We examined the hypothesis that the extent of vegetation cover governs the fluxes of nutrients from boreal and subarctic river catchments to the sea. Fluxes of total organic carbon (TOC) and dissolved inorganic nitrogen, phosphorus, and dissolved silicate (DIN, DIP, and DSi, respectively) are described from 19 river catchments and subcatchments (ranging in size from 34 to 40,000 km2) in northern Sweden with a detailed analysis of the rivers Lulea¨lven and Kalixa¨lven. Fluxes of TOC, DIP, and DSi increase by an order of magnitude with increasing proportion of forest and wetland area, whereas DIN did not follow this pattern but remained constantly low. Principal component analysis on landscape variables showed the importance of almost all land cover and soil type variables associated with vegetation, periglacial environment, soil and bedrock with slow weathering rates, boundary of upper tree line, and percentage of lake area. A cluster analysis of the principal components showed that the river systems could be separated into mountainous headwaters and forest and wetland catchments. This clustering was also valid in relation to river chemistry (TOC, DIP, and DSi) and was confirmed with a redundancy analysis, including river chemistry and principal components as environmental variables. The first axis explains 89% of the variance in river chemistry and almost 100% of the variance in the relation between river chemistry and landscape variables. These results suggest that vegetation change during interglacial periods is likely to have had a major effect on inputs of TOC, DIP, and DSi into the past ocean. Original publication: Christoph Humborg, Erik Smedberg, Sven Blomqvist, Carl-Magnus Mörth, Jenni Brink, Lars Rahm, Åsa Danielsson and Jörgen Sahlberg, Nutrient variations in boreal and subarctic Swedish rivers: Landscape control of land–sea fluxes, 2004, Limnology & Oceanology, (49), 5, 1871-1883. Copyright: American Society of Limnology and Oceanology, http://www.aslo.org/lo/ Article in Journal/Newspaper Northern Sweden Subarctic LIU - Linköping University: Publications (DiVA) Sven ENVELOPE(-60.200,-60.200,-63.733,-63.733) Lulea ENVELOPE(22.166,22.166,65.580,65.580) |
institution |
Open Polar |
collection |
LIU - Linköping University: Publications (DiVA) |
op_collection_id |
ftlinkoepinguniv |
language |
English |
topic |
Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser |
spellingShingle |
Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser Humborg, Christoph Smedberg, Erik Blomqvist, Sven Mörth, Carl-Magnus Brink, Jenni Rahm, Lars Danielsson, Åsa Sahlberg, Jörgen Nutrient variations in boreal and subarctic Swedish rivers : Landscape control of land–sea fluxes |
topic_facet |
Oceanography Hydrology and Water Resources Oceanografi hydrologi och vattenresurser |
description |
We examined the hypothesis that the extent of vegetation cover governs the fluxes of nutrients from boreal and subarctic river catchments to the sea. Fluxes of total organic carbon (TOC) and dissolved inorganic nitrogen, phosphorus, and dissolved silicate (DIN, DIP, and DSi, respectively) are described from 19 river catchments and subcatchments (ranging in size from 34 to 40,000 km2) in northern Sweden with a detailed analysis of the rivers Lulea¨lven and Kalixa¨lven. Fluxes of TOC, DIP, and DSi increase by an order of magnitude with increasing proportion of forest and wetland area, whereas DIN did not follow this pattern but remained constantly low. Principal component analysis on landscape variables showed the importance of almost all land cover and soil type variables associated with vegetation, periglacial environment, soil and bedrock with slow weathering rates, boundary of upper tree line, and percentage of lake area. A cluster analysis of the principal components showed that the river systems could be separated into mountainous headwaters and forest and wetland catchments. This clustering was also valid in relation to river chemistry (TOC, DIP, and DSi) and was confirmed with a redundancy analysis, including river chemistry and principal components as environmental variables. The first axis explains 89% of the variance in river chemistry and almost 100% of the variance in the relation between river chemistry and landscape variables. These results suggest that vegetation change during interglacial periods is likely to have had a major effect on inputs of TOC, DIP, and DSi into the past ocean. Original publication: Christoph Humborg, Erik Smedberg, Sven Blomqvist, Carl-Magnus Mörth, Jenni Brink, Lars Rahm, Åsa Danielsson and Jörgen Sahlberg, Nutrient variations in boreal and subarctic Swedish rivers: Landscape control of land–sea fluxes, 2004, Limnology & Oceanology, (49), 5, 1871-1883. Copyright: American Society of Limnology and Oceanology, http://www.aslo.org/lo/ |
format |
Article in Journal/Newspaper |
author |
Humborg, Christoph Smedberg, Erik Blomqvist, Sven Mörth, Carl-Magnus Brink, Jenni Rahm, Lars Danielsson, Åsa Sahlberg, Jörgen |
author_facet |
Humborg, Christoph Smedberg, Erik Blomqvist, Sven Mörth, Carl-Magnus Brink, Jenni Rahm, Lars Danielsson, Åsa Sahlberg, Jörgen |
author_sort |
Humborg, Christoph |
title |
Nutrient variations in boreal and subarctic Swedish rivers : Landscape control of land–sea fluxes |
title_short |
Nutrient variations in boreal and subarctic Swedish rivers : Landscape control of land–sea fluxes |
title_full |
Nutrient variations in boreal and subarctic Swedish rivers : Landscape control of land–sea fluxes |
title_fullStr |
Nutrient variations in boreal and subarctic Swedish rivers : Landscape control of land–sea fluxes |
title_full_unstemmed |
Nutrient variations in boreal and subarctic Swedish rivers : Landscape control of land–sea fluxes |
title_sort |
nutrient variations in boreal and subarctic swedish rivers : landscape control of land–sea fluxes |
publisher |
Linköpings universitet, Tema vatten i natur och samhälle |
publishDate |
2004 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-12551 |
long_lat |
ENVELOPE(-60.200,-60.200,-63.733,-63.733) ENVELOPE(22.166,22.166,65.580,65.580) |
geographic |
Sven Lulea |
geographic_facet |
Sven Lulea |
genre |
Northern Sweden Subarctic |
genre_facet |
Northern Sweden Subarctic |
op_relation |
Limnology and Oceanography, 0024-3590, 2004, 49:5, s. 1871-1883 http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-12551 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766147873931526144 |