Potential for long-term transfer of dissolved organic carbon from riparian zones to streams in boreal catchments
Boreal regions store most of the global terrestrial carbon, which can be transferred as dissolved organic carbon (DOC) to inland waters with implications for both aquatic ecology and carbon budgets. Headwater riparian zones (RZ) are important sources of DOC, and often just a narrow ‘dominant source...
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Online Access: | https://pub.epsilon.slu.se/12525/ https://pub.epsilon.slu.se/12525/7/ledesma_j_et_al_150826.pdf https://doi.org/10.1111/gcb.12872 |
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ftslunivuppsala:oai:pub.epsilon.slu.se:12525 2023-05-15T17:45:07+02:00 Potential for long-term transfer of dissolved organic carbon from riparian zones to streams in boreal catchments Ledesma, Jose Grabs, Thomas Bishop, Kevin Schiff, Sherry L. Köhler, Stephan 2015 application/pdf https://pub.epsilon.slu.se/12525/ https://pub.epsilon.slu.se/12525/7/ledesma_j_et_al_150826.pdf https://doi.org/10.1111/gcb.12872 en eng eng https://pub.epsilon.slu.se/12525/7/ledesma_j_et_al_150826.pdf Ledesma, Jose and Grabs, Thomas and Bishop, Kevin and Schiff, Sherry L. and Köhler, Stephan (2015). Potential for long-term transfer of dissolved organic carbon from riparian zones to streams in boreal catchments. Global change biology. 21 :8 , 2963-2979 [Research article] cc_by_nc CC-BY-NC Climate Research Environmental Sciences (social aspects to be 507) Geosciences Multidisciplinary Research article PeerReviewed 2015 ftslunivuppsala https://doi.org/10.1111/gcb.12872 2022-01-09T19:13:36Z Boreal regions store most of the global terrestrial carbon, which can be transferred as dissolved organic carbon (DOC) to inland waters with implications for both aquatic ecology and carbon budgets. Headwater riparian zones (RZ) are important sources of DOC, and often just a narrow ‘dominant source layer' (DSL) within the riparian profile is responsible for most of the DOC export. Two important questions arise: how long boreal RZ could sustain lateral DOC fluxes as the sole source of exported carbon and how its hydromorphological variability influences this role. We estimate theoretical turnover times by comparing carbon pools and lateral exports in the DSL of 13 riparian profiles distributed over a 69km2 catchment in northern Sweden. The thickness of the DSL was 36±18 (average ± SD) cm. Thus, only about one-third of the 1-m-deep riparian profile contributed 90% of the lateral DOC flux. The 13 RZ exported 8.7±6.5g C m-2year-1, covering the whole range of boreal stream DOC exports. The variation could be explained by local hydromorphological characteristics including RZ width (R2=0.90). The estimated theoretical turnover times were hundreds to a few thousands of years, that is there is a potential long-lasting supply of DOC. Estimates of net ecosystem production in the RZ suggest that lateral fluxes, including both organic and inorganic C, could be maintained without drawing down the riparian pools. This was supported by measurements of stream DO14C that indicated modern carbon as the predominant fraction exported, including streams disturbed by ditching. The transfer of DOC into boreal inland waters from new and old carbon sources has a major influence on surface water quality and global carbon balances. This study highlights the importance of local variations in RZ hydromorphology and DSL extent for future DOC fluxes under a changing climate. Article in Journal/Newspaper Northern Sweden Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive Global Change Biology 21 8 2963 2979 |
institution |
Open Polar |
collection |
Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive |
op_collection_id |
ftslunivuppsala |
language |
English |
topic |
Climate Research Environmental Sciences (social aspects to be 507) Geosciences Multidisciplinary |
spellingShingle |
Climate Research Environmental Sciences (social aspects to be 507) Geosciences Multidisciplinary Ledesma, Jose Grabs, Thomas Bishop, Kevin Schiff, Sherry L. Köhler, Stephan Potential for long-term transfer of dissolved organic carbon from riparian zones to streams in boreal catchments |
topic_facet |
Climate Research Environmental Sciences (social aspects to be 507) Geosciences Multidisciplinary |
description |
Boreal regions store most of the global terrestrial carbon, which can be transferred as dissolved organic carbon (DOC) to inland waters with implications for both aquatic ecology and carbon budgets. Headwater riparian zones (RZ) are important sources of DOC, and often just a narrow ‘dominant source layer' (DSL) within the riparian profile is responsible for most of the DOC export. Two important questions arise: how long boreal RZ could sustain lateral DOC fluxes as the sole source of exported carbon and how its hydromorphological variability influences this role. We estimate theoretical turnover times by comparing carbon pools and lateral exports in the DSL of 13 riparian profiles distributed over a 69km2 catchment in northern Sweden. The thickness of the DSL was 36±18 (average ± SD) cm. Thus, only about one-third of the 1-m-deep riparian profile contributed 90% of the lateral DOC flux. The 13 RZ exported 8.7±6.5g C m-2year-1, covering the whole range of boreal stream DOC exports. The variation could be explained by local hydromorphological characteristics including RZ width (R2=0.90). The estimated theoretical turnover times were hundreds to a few thousands of years, that is there is a potential long-lasting supply of DOC. Estimates of net ecosystem production in the RZ suggest that lateral fluxes, including both organic and inorganic C, could be maintained without drawing down the riparian pools. This was supported by measurements of stream DO14C that indicated modern carbon as the predominant fraction exported, including streams disturbed by ditching. The transfer of DOC into boreal inland waters from new and old carbon sources has a major influence on surface water quality and global carbon balances. This study highlights the importance of local variations in RZ hydromorphology and DSL extent for future DOC fluxes under a changing climate. |
format |
Article in Journal/Newspaper |
author |
Ledesma, Jose Grabs, Thomas Bishop, Kevin Schiff, Sherry L. Köhler, Stephan |
author_facet |
Ledesma, Jose Grabs, Thomas Bishop, Kevin Schiff, Sherry L. Köhler, Stephan |
author_sort |
Ledesma, Jose |
title |
Potential for long-term transfer of dissolved organic carbon from riparian zones to streams in boreal catchments |
title_short |
Potential for long-term transfer of dissolved organic carbon from riparian zones to streams in boreal catchments |
title_full |
Potential for long-term transfer of dissolved organic carbon from riparian zones to streams in boreal catchments |
title_fullStr |
Potential for long-term transfer of dissolved organic carbon from riparian zones to streams in boreal catchments |
title_full_unstemmed |
Potential for long-term transfer of dissolved organic carbon from riparian zones to streams in boreal catchments |
title_sort |
potential for long-term transfer of dissolved organic carbon from riparian zones to streams in boreal catchments |
publishDate |
2015 |
url |
https://pub.epsilon.slu.se/12525/ https://pub.epsilon.slu.se/12525/7/ledesma_j_et_al_150826.pdf https://doi.org/10.1111/gcb.12872 |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_relation |
https://pub.epsilon.slu.se/12525/7/ledesma_j_et_al_150826.pdf Ledesma, Jose and Grabs, Thomas and Bishop, Kevin and Schiff, Sherry L. and Köhler, Stephan (2015). Potential for long-term transfer of dissolved organic carbon from riparian zones to streams in boreal catchments. Global change biology. 21 :8 , 2963-2979 [Research article] |
op_rights |
cc_by_nc |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.1111/gcb.12872 |
container_title |
Global Change Biology |
container_volume |
21 |
container_issue |
8 |
container_start_page |
2963 |
op_container_end_page |
2979 |
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1766147888853811200 |