Uncertainty-based terrestrial critical loads of nutrient nitrogen in northern Saskatchewan, Canada
Atmospheric deposition of nitrogen (N) to boreal and taiga forests of Saskatchewan, Canada, is currently low, but there is concern over terrestrial eutrophication due to potential increases in deposition associated with industrial activities. Critical loads of nutrient N (CLnutN) were determined for...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/578362 2024-09-15T18:00:08+00:00 Uncertainty-based terrestrial critical loads of nutrient nitrogen in northern Saskatchewan, Canada Murray, C.A. Whitfield, C.J. Watmough, S.A. 2024-06-27T13:45:00Z 231-244 application/pdf http://hdl.handle.net/10138/578362 eng eng Boreal Environment Research Publishing Board Boreal Environment Research 1239-6095 1797-2469 22 http://hdl.handle.net/10138/578362 Suomen ympäristökeskus CC BY 4.0 openAccess Artikkeli lehdessä 2024 ftunivhelsihelda 2024-08-21T23:48:04Z Atmospheric deposition of nitrogen (N) to boreal and taiga forests of Saskatchewan, Canada, is currently low, but there is concern over terrestrial eutrophication due to potential increases in deposition associated with industrial activities. Critical loads of nutrient N (CLnutN) were determined for five upland forest ecoregions according to the Simple Mass Balance (SMB) model using an uncertainty-based approach. Median ecoregion CLnutN ranged from 88 to 123 molc ha–1 yr–1 (1.2–1.8 kg N ha–1 yr–1), with higher CLnutN in the south. Median CLnutN for a small number of sites in the southernmost ecoregion were exceeded under both fire and harvest disturbance regimes, according to current N deposition. During the 21st century, median CLnutN were predicted to increase by more than 20% in response to climate driven increases in runoff and temperature. Current atmospheric deposition levels in the region are uncertain, and there is an ongoing need to monitor deposition and exceedance risk. Article in Journal/Newspaper Boreal Environment Research taiga HELDA – University of Helsinki Open Repository |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
description |
Atmospheric deposition of nitrogen (N) to boreal and taiga forests of Saskatchewan, Canada, is currently low, but there is concern over terrestrial eutrophication due to potential increases in deposition associated with industrial activities. Critical loads of nutrient N (CLnutN) were determined for five upland forest ecoregions according to the Simple Mass Balance (SMB) model using an uncertainty-based approach. Median ecoregion CLnutN ranged from 88 to 123 molc ha–1 yr–1 (1.2–1.8 kg N ha–1 yr–1), with higher CLnutN in the south. Median CLnutN for a small number of sites in the southernmost ecoregion were exceeded under both fire and harvest disturbance regimes, according to current N deposition. During the 21st century, median CLnutN were predicted to increase by more than 20% in response to climate driven increases in runoff and temperature. Current atmospheric deposition levels in the region are uncertain, and there is an ongoing need to monitor deposition and exceedance risk. |
format |
Article in Journal/Newspaper |
author |
Murray, C.A. Whitfield, C.J. Watmough, S.A. |
spellingShingle |
Murray, C.A. Whitfield, C.J. Watmough, S.A. Uncertainty-based terrestrial critical loads of nutrient nitrogen in northern Saskatchewan, Canada |
author_facet |
Murray, C.A. Whitfield, C.J. Watmough, S.A. |
author_sort |
Murray, C.A. |
title |
Uncertainty-based terrestrial critical loads of nutrient nitrogen in northern Saskatchewan, Canada |
title_short |
Uncertainty-based terrestrial critical loads of nutrient nitrogen in northern Saskatchewan, Canada |
title_full |
Uncertainty-based terrestrial critical loads of nutrient nitrogen in northern Saskatchewan, Canada |
title_fullStr |
Uncertainty-based terrestrial critical loads of nutrient nitrogen in northern Saskatchewan, Canada |
title_full_unstemmed |
Uncertainty-based terrestrial critical loads of nutrient nitrogen in northern Saskatchewan, Canada |
title_sort |
uncertainty-based terrestrial critical loads of nutrient nitrogen in northern saskatchewan, canada |
publisher |
Boreal Environment Research Publishing Board |
publishDate |
2024 |
url |
http://hdl.handle.net/10138/578362 |
genre |
Boreal Environment Research taiga |
genre_facet |
Boreal Environment Research taiga |
op_relation |
Boreal Environment Research 1239-6095 1797-2469 22 http://hdl.handle.net/10138/578362 Suomen ympäristökeskus |
op_rights |
CC BY 4.0 openAccess |
_version_ |
1810437243274264576 |