Influence of the permafrost boundary on dissolved organic matter characteristics in rivers within the Boreal and Taiga plains of western Canada
Catchment export of terrestrial dissolved organic matter (DOM) and its downstream degradation in aquatic ecosystems are important components of landscape scale carbon balances. In order to assess the influence of peatland permafrost on river DOM characteristics, we sampled 65 rivers along a 900 km t...
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ftdoajarticles:oai:doaj.org/article:135e17fc4f93440a868555dcfe397b6e 2023-09-05T13:22:25+02:00 Influence of the permafrost boundary on dissolved organic matter characteristics in rivers within the Boreal and Taiga plains of western Canada D Olefeldt A Persson M R Turetsky 2014-01-01T00:00:00Z https://doi.org/10.1088/1748-9326/9/3/035005 https://doaj.org/article/135e17fc4f93440a868555dcfe397b6e EN eng IOP Publishing https://doi.org/10.1088/1748-9326/9/3/035005 https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/9/3/035005 1748-9326 https://doaj.org/article/135e17fc4f93440a868555dcfe397b6e Environmental Research Letters, Vol 9, Iss 3, p 035005 (2014) dissolved organic matter dissolved organic carbon permafrost peatlands boreal river Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 article 2014 ftdoajarticles https://doi.org/10.1088/1748-9326/9/3/035005 2023-08-13T00:37:22Z Catchment export of terrestrial dissolved organic matter (DOM) and its downstream degradation in aquatic ecosystems are important components of landscape scale carbon balances. In order to assess the influence of peatland permafrost on river DOM characteristics, we sampled 65 rivers along a 900 km transect crossing into the southern discontinuous permafrost zone on the Boreal and Tundra Plains of western Canada. Catchment peatland cover and catchment location north or south of the permafrost boundary were found together to have strong influences on dissolved organic carbon (DOC) concentrations and DOM chemical composition. River DOC concentrations increased with catchment peatland cover, but were consistently lower for catchments north of the permafrost boundary. In contrast, protein fluorescence (PARAFAC analysis), was unrelated to catchment peatland cover but increased significantly in rivers north of the permafrost boundary. Humic and fulvic acid contribution to DOM fluorescence was lower in rivers draining catchments with large lakes than in other rivers, consistent with extensive photodegradation, but humic and fulvic acid fluorescence were also lower in rivers north of the permafrost boundary than in rivers to the south. We hypothesize that shifts in river DOM characteristics when crossing the permafrost boundary are related to the influence of permafrost on peatland hydrological connectivity to stream networks, peatland DOM characteristics and differences in DOM degradation within aquatic ecosystems. Article in Journal/Newspaper permafrost taiga Taiga plains Tundra Directory of Open Access Journals: DOAJ Articles Canada Environmental Research Letters 9 3 035005 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
dissolved organic matter dissolved organic carbon permafrost peatlands boreal river Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
spellingShingle |
dissolved organic matter dissolved organic carbon permafrost peatlands boreal river Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 D Olefeldt A Persson M R Turetsky Influence of the permafrost boundary on dissolved organic matter characteristics in rivers within the Boreal and Taiga plains of western Canada |
topic_facet |
dissolved organic matter dissolved organic carbon permafrost peatlands boreal river Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
description |
Catchment export of terrestrial dissolved organic matter (DOM) and its downstream degradation in aquatic ecosystems are important components of landscape scale carbon balances. In order to assess the influence of peatland permafrost on river DOM characteristics, we sampled 65 rivers along a 900 km transect crossing into the southern discontinuous permafrost zone on the Boreal and Tundra Plains of western Canada. Catchment peatland cover and catchment location north or south of the permafrost boundary were found together to have strong influences on dissolved organic carbon (DOC) concentrations and DOM chemical composition. River DOC concentrations increased with catchment peatland cover, but were consistently lower for catchments north of the permafrost boundary. In contrast, protein fluorescence (PARAFAC analysis), was unrelated to catchment peatland cover but increased significantly in rivers north of the permafrost boundary. Humic and fulvic acid contribution to DOM fluorescence was lower in rivers draining catchments with large lakes than in other rivers, consistent with extensive photodegradation, but humic and fulvic acid fluorescence were also lower in rivers north of the permafrost boundary than in rivers to the south. We hypothesize that shifts in river DOM characteristics when crossing the permafrost boundary are related to the influence of permafrost on peatland hydrological connectivity to stream networks, peatland DOM characteristics and differences in DOM degradation within aquatic ecosystems. |
format |
Article in Journal/Newspaper |
author |
D Olefeldt A Persson M R Turetsky |
author_facet |
D Olefeldt A Persson M R Turetsky |
author_sort |
D Olefeldt |
title |
Influence of the permafrost boundary on dissolved organic matter characteristics in rivers within the Boreal and Taiga plains of western Canada |
title_short |
Influence of the permafrost boundary on dissolved organic matter characteristics in rivers within the Boreal and Taiga plains of western Canada |
title_full |
Influence of the permafrost boundary on dissolved organic matter characteristics in rivers within the Boreal and Taiga plains of western Canada |
title_fullStr |
Influence of the permafrost boundary on dissolved organic matter characteristics in rivers within the Boreal and Taiga plains of western Canada |
title_full_unstemmed |
Influence of the permafrost boundary on dissolved organic matter characteristics in rivers within the Boreal and Taiga plains of western Canada |
title_sort |
influence of the permafrost boundary on dissolved organic matter characteristics in rivers within the boreal and taiga plains of western canada |
publisher |
IOP Publishing |
publishDate |
2014 |
url |
https://doi.org/10.1088/1748-9326/9/3/035005 https://doaj.org/article/135e17fc4f93440a868555dcfe397b6e |
geographic |
Canada |
geographic_facet |
Canada |
genre |
permafrost taiga Taiga plains Tundra |
genre_facet |
permafrost taiga Taiga plains Tundra |
op_source |
Environmental Research Letters, Vol 9, Iss 3, p 035005 (2014) |
op_relation |
https://doi.org/10.1088/1748-9326/9/3/035005 https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/9/3/035005 1748-9326 https://doaj.org/article/135e17fc4f93440a868555dcfe397b6e |
op_doi |
https://doi.org/10.1088/1748-9326/9/3/035005 |
container_title |
Environmental Research Letters |
container_volume |
9 |
container_issue |
3 |
container_start_page |
035005 |
_version_ |
1776202928884809728 |