Bioavailability of stream dissolved organic carbon (DOC) during spring flood and base flow in high-latitude streams
An important component of the carbon cycle is the lateral flow of dissolved organic carbon (DOC) from terrestrial ecosystems to streams and rivers. The fate of this carbon depends very much on the bioavailability of DOC (BDOC), which may determine whether DOC is returned to the atmosphere as CO2 or...
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ftulundlup:oai:lup.lub.lu.se:8522fb18-9c80-4a30-b63a-f7de2d391db2 2023-05-15T15:05:59+02:00 Bioavailability of stream dissolved organic carbon (DOC) during spring flood and base flow in high-latitude streams Erhagen, Björn Berggren, Martin Sponseller, Ryan A. Panneer Selvam, Balathandayuthabani Giesler, Reiner 2015 https://lup.lub.lu.se/record/8522fb18-9c80-4a30-b63a-f7de2d391db2 eng eng https://lup.lub.lu.se/record/8522fb18-9c80-4a30-b63a-f7de2d391db2 Earth and Related Environmental Sciences contributiontoconference/abstract info:eu-repo/semantics/conferenceObject text 2015 ftulundlup 2023-02-01T23:37:00Z An important component of the carbon cycle is the lateral flow of dissolved organic carbon (DOC) from terrestrial ecosystems to streams and rivers. The fate of this carbon depends very much on the bioavailability of DOC (BDOC), which may determine whether DOC is returned to the atmosphere as CO2 or deposited in sediments. This study focuses on the linkages between stream DOC composition, optical characteristics and bioavailability along vegetation gradients in subarctic Sweden. We sampled streams from tundra, birch forest, and boreal forest ecoregions, which encompass large differences in C:N ratios (6.4-30.1) and spectroscopic characteristics, all related to variation in landscape properties. The DOC bioavailability was determined through laboratory bioassays carried out twice during the year (spring-flood and base flow). During spring flood, DOC concentration varied between 0.5 - 6.7 mg L-1 and the BDOC ranged between 3- 24 %, with the highest BDOC from birch forest/tundra and tundra streams. Results suggest that broad-scale transitions in vegetation structure across sub-arctic landscapes have important implications for the quantity and quality of DOC delivered to aquatic ecosystems. Conference Object Arctic Subarctic Tundra Lund University Publications (LUP) Arctic |
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Open Polar |
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Lund University Publications (LUP) |
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ftulundlup |
language |
English |
topic |
Earth and Related Environmental Sciences |
spellingShingle |
Earth and Related Environmental Sciences Erhagen, Björn Berggren, Martin Sponseller, Ryan A. Panneer Selvam, Balathandayuthabani Giesler, Reiner Bioavailability of stream dissolved organic carbon (DOC) during spring flood and base flow in high-latitude streams |
topic_facet |
Earth and Related Environmental Sciences |
description |
An important component of the carbon cycle is the lateral flow of dissolved organic carbon (DOC) from terrestrial ecosystems to streams and rivers. The fate of this carbon depends very much on the bioavailability of DOC (BDOC), which may determine whether DOC is returned to the atmosphere as CO2 or deposited in sediments. This study focuses on the linkages between stream DOC composition, optical characteristics and bioavailability along vegetation gradients in subarctic Sweden. We sampled streams from tundra, birch forest, and boreal forest ecoregions, which encompass large differences in C:N ratios (6.4-30.1) and spectroscopic characteristics, all related to variation in landscape properties. The DOC bioavailability was determined through laboratory bioassays carried out twice during the year (spring-flood and base flow). During spring flood, DOC concentration varied between 0.5 - 6.7 mg L-1 and the BDOC ranged between 3- 24 %, with the highest BDOC from birch forest/tundra and tundra streams. Results suggest that broad-scale transitions in vegetation structure across sub-arctic landscapes have important implications for the quantity and quality of DOC delivered to aquatic ecosystems. |
format |
Conference Object |
author |
Erhagen, Björn Berggren, Martin Sponseller, Ryan A. Panneer Selvam, Balathandayuthabani Giesler, Reiner |
author_facet |
Erhagen, Björn Berggren, Martin Sponseller, Ryan A. Panneer Selvam, Balathandayuthabani Giesler, Reiner |
author_sort |
Erhagen, Björn |
title |
Bioavailability of stream dissolved organic carbon (DOC) during spring flood and base flow in high-latitude streams |
title_short |
Bioavailability of stream dissolved organic carbon (DOC) during spring flood and base flow in high-latitude streams |
title_full |
Bioavailability of stream dissolved organic carbon (DOC) during spring flood and base flow in high-latitude streams |
title_fullStr |
Bioavailability of stream dissolved organic carbon (DOC) during spring flood and base flow in high-latitude streams |
title_full_unstemmed |
Bioavailability of stream dissolved organic carbon (DOC) during spring flood and base flow in high-latitude streams |
title_sort |
bioavailability of stream dissolved organic carbon (doc) during spring flood and base flow in high-latitude streams |
publishDate |
2015 |
url |
https://lup.lub.lu.se/record/8522fb18-9c80-4a30-b63a-f7de2d391db2 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Subarctic Tundra |
genre_facet |
Arctic Subarctic Tundra |
op_relation |
https://lup.lub.lu.se/record/8522fb18-9c80-4a30-b63a-f7de2d391db2 |
_version_ |
1766337657777946624 |