Land-cover, climate and fjord morphology drive differences in organic matter and nutrient dynamics in two contrasting northern river-fjord systems
Climate and land-use changes are leading to impacts on individual ecosystems as well as shifts in transfer dynamics between interconnected systems. At the land-ocean interface, changes in riverine inputs of organic matter (OM) and nutrients have the potential to lead to shifts in coastal carbon and...
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Online Access: | https://hdl.handle.net/11250/3004656 https://doi.org/10.1016/j.ecss.2022.107831 |
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ftnorskinstvf:oai:niva.brage.unit.no:11250/3004656 2023-05-15T18:28:06+02:00 Land-cover, climate and fjord morphology drive differences in organic matter and nutrient dynamics in two contrasting northern river-fjord systems Schultze, Sabrina Andersen, Tom Hessen, Dag Olav Ruus, Anders Borgå, Katrine Poste, Amanda 2022 application/pdf https://hdl.handle.net/11250/3004656 https://doi.org/10.1016/j.ecss.2022.107831 eng eng Elsevier Norges forskningsråd: 160016 Estuarine, Coastal and Shelf Science. 2022, 270, 107831. urn:issn:0272-7714 https://hdl.handle.net/11250/3004656 https://doi.org/10.1016/j.ecss.2022.107831 cristin:2020417 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2022 The Authors. CC-BY 14 270 Estuarine, Coastal and Shelf Science 107831 Peer reviewed Journal article 2022 ftnorskinstvf https://doi.org/10.1016/j.ecss.2022.107831 2023-02-21T08:46:28Z Climate and land-use changes are leading to impacts on individual ecosystems as well as shifts in transfer dynamics between interconnected systems. At the land-ocean interface, changes in riverine inputs of organic matter (OM) and nutrients have the potential to lead to shifts in coastal carbon and nutrient cycling with consequences for ecosystem structure and function. In this study, we assess OM and nutrient dynamics for two contrasting Norwegian river-to-fjord systems: a boreal system with a forested catchment draining into a narrow fjord (‘narrow boreal system’), and a subarctic system where lowland forests and mountainous regions drain into a broad fjord (‘broad subarctic system’). We characterized seasonal organic carbon and nutrient concentrations and DOM absorption properties for samples collected along transects from river to outer fjord during 2015/2016. While differences in catchment properties drove contrasts in river chemistry between the two study rivers, fjord morphology and hydrodynamics as well as dissolved organic carbon (DOC) and nutrient concentrations in marine receiving waters predicted water-chemistry patterns along the transect. The narrow boreal system, with high riverine DOC and nutrient concentrations, was structured mainly by a horizontal salinity gradient from river to outer fjord, with limited impact of seasonality. In contrast, the broad subarctic system tended to be dominated by vertical salinity stratification, with strong between-date differences in surface water salinity linked to seasonality in river discharge. These dynamics were also reflected in the strong horizontal gradients in DOC, nutrients and DOM properties in the narrow boreal system, in contrast to the broad subarctic system, where strong seasonality paired with a lack of strong contrast between riverine and marine concentrations of DOC and most nutrients led to an uncoupling between salinity and other water chemistry variables. In the narrow boreal system, terrestrial OM dominated both the particulate and dissolved ... Article in Journal/Newspaper Subarctic Norwegian Institute for Water research: NIVA Open Access Archive (Brage) Estuarine, Coastal and Shelf Science 270 107831 |
institution |
Open Polar |
collection |
Norwegian Institute for Water research: NIVA Open Access Archive (Brage) |
op_collection_id |
ftnorskinstvf |
language |
English |
description |
Climate and land-use changes are leading to impacts on individual ecosystems as well as shifts in transfer dynamics between interconnected systems. At the land-ocean interface, changes in riverine inputs of organic matter (OM) and nutrients have the potential to lead to shifts in coastal carbon and nutrient cycling with consequences for ecosystem structure and function. In this study, we assess OM and nutrient dynamics for two contrasting Norwegian river-to-fjord systems: a boreal system with a forested catchment draining into a narrow fjord (‘narrow boreal system’), and a subarctic system where lowland forests and mountainous regions drain into a broad fjord (‘broad subarctic system’). We characterized seasonal organic carbon and nutrient concentrations and DOM absorption properties for samples collected along transects from river to outer fjord during 2015/2016. While differences in catchment properties drove contrasts in river chemistry between the two study rivers, fjord morphology and hydrodynamics as well as dissolved organic carbon (DOC) and nutrient concentrations in marine receiving waters predicted water-chemistry patterns along the transect. The narrow boreal system, with high riverine DOC and nutrient concentrations, was structured mainly by a horizontal salinity gradient from river to outer fjord, with limited impact of seasonality. In contrast, the broad subarctic system tended to be dominated by vertical salinity stratification, with strong between-date differences in surface water salinity linked to seasonality in river discharge. These dynamics were also reflected in the strong horizontal gradients in DOC, nutrients and DOM properties in the narrow boreal system, in contrast to the broad subarctic system, where strong seasonality paired with a lack of strong contrast between riverine and marine concentrations of DOC and most nutrients led to an uncoupling between salinity and other water chemistry variables. In the narrow boreal system, terrestrial OM dominated both the particulate and dissolved ... |
format |
Article in Journal/Newspaper |
author |
Schultze, Sabrina Andersen, Tom Hessen, Dag Olav Ruus, Anders Borgå, Katrine Poste, Amanda |
spellingShingle |
Schultze, Sabrina Andersen, Tom Hessen, Dag Olav Ruus, Anders Borgå, Katrine Poste, Amanda Land-cover, climate and fjord morphology drive differences in organic matter and nutrient dynamics in two contrasting northern river-fjord systems |
author_facet |
Schultze, Sabrina Andersen, Tom Hessen, Dag Olav Ruus, Anders Borgå, Katrine Poste, Amanda |
author_sort |
Schultze, Sabrina |
title |
Land-cover, climate and fjord morphology drive differences in organic matter and nutrient dynamics in two contrasting northern river-fjord systems |
title_short |
Land-cover, climate and fjord morphology drive differences in organic matter and nutrient dynamics in two contrasting northern river-fjord systems |
title_full |
Land-cover, climate and fjord morphology drive differences in organic matter and nutrient dynamics in two contrasting northern river-fjord systems |
title_fullStr |
Land-cover, climate and fjord morphology drive differences in organic matter and nutrient dynamics in two contrasting northern river-fjord systems |
title_full_unstemmed |
Land-cover, climate and fjord morphology drive differences in organic matter and nutrient dynamics in two contrasting northern river-fjord systems |
title_sort |
land-cover, climate and fjord morphology drive differences in organic matter and nutrient dynamics in two contrasting northern river-fjord systems |
publisher |
Elsevier |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3004656 https://doi.org/10.1016/j.ecss.2022.107831 |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
14 270 Estuarine, Coastal and Shelf Science 107831 |
op_relation |
Norges forskningsråd: 160016 Estuarine, Coastal and Shelf Science. 2022, 270, 107831. urn:issn:0272-7714 https://hdl.handle.net/11250/3004656 https://doi.org/10.1016/j.ecss.2022.107831 cristin:2020417 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2022 The Authors. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.ecss.2022.107831 |
container_title |
Estuarine, Coastal and Shelf Science |
container_volume |
270 |
container_start_page |
107831 |
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1766210454031433728 |