Composition and variations in the occurrence of dissolved free simple organic compounds of an unproductive lake ecosystem in northern Sweden
Low molecular weight organic carbon compounds are potentially important carbon and energy substrates to heterotrophic production in the aquatic environment. We studied the occurrence of dissolved free amino acids (AA), monosaccharides (CHO), and carboxylic acids (CA) in the subarctic Lake Diktar-Eri...
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Online Access: | https://lup.lub.lu.se/record/677561 https://doi.org/10.1007/s10533-006-9060-4 |
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ftulundlup:oai:lup.lub.lu.se:cb4ff68a-b401-433a-8ad0-7b3b1646d6e5 2023-05-15T17:45:01+02:00 Composition and variations in the occurrence of dissolved free simple organic compounds of an unproductive lake ecosystem in northern Sweden Jonsson, Anders Ström, Lena Aberg, Jan 2007 https://lup.lub.lu.se/record/677561 https://doi.org/10.1007/s10533-006-9060-4 eng eng Springer https://lup.lub.lu.se/record/677561 http://dx.doi.org/10.1007/s10533-006-9060-4 wos:000243554400004 scopus:33846423923 Biogeochemistry; 82(2), pp 153-163 (2007) ISSN: 1573-515X Physical Geography respiration DOC carbohydrates amino acids carboxylic acids subarctic lakes contributiontojournal/article info:eu-repo/semantics/article text 2007 ftulundlup https://doi.org/10.1007/s10533-006-9060-4 2023-02-01T23:32:59Z Low molecular weight organic carbon compounds are potentially important carbon and energy substrates to heterotrophic production in the aquatic environment. We studied the occurrence of dissolved free amino acids (AA), monosaccharides (CHO), and carboxylic acids (CA) in the subarctic Lake Diktar-Erik. The lake is unproductive with slightly humic water, and receives water via one major inlet stream draining a birch forest environment. The concentration of dissolved organic carbon (DOC) in the inlet stream was strongly correlated with the discharge. This relationship changed from season to season, indicating changes in the sources of the DOC entering the stream. AA and CHO each accounted for an average of less than 0.5% of the DOC. After high discharge events during the ice-free period, AA and CHO occurred in especially high concentrations. CA occurred in higher concentrations during the ice-free period, when it generally accounted for 20-30% of the DOC pool. The CA content relative to the total DOC pool was strongly inversely correlated with overall DOC concentration, and at low DOC levels the relative content of CA was high and vice versa. This followed a seasonal trend, with CA accounting for a smaller proportion of the DOC in winter and a larger part in spring/early summer. A conservative estimate suggested that the studied simple organic carbon compounds potentially could cover 30% of the bacterial gross production in the lake and therefore potentially also was an important source of CO2 that occur in supersaturated concentrations in the lake. Article in Journal/Newspaper Northern Sweden Subarctic Lund University Publications (LUP) Biogeochemistry 82 2 153 163 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Physical Geography respiration DOC carbohydrates amino acids carboxylic acids subarctic lakes |
spellingShingle |
Physical Geography respiration DOC carbohydrates amino acids carboxylic acids subarctic lakes Jonsson, Anders Ström, Lena Aberg, Jan Composition and variations in the occurrence of dissolved free simple organic compounds of an unproductive lake ecosystem in northern Sweden |
topic_facet |
Physical Geography respiration DOC carbohydrates amino acids carboxylic acids subarctic lakes |
description |
Low molecular weight organic carbon compounds are potentially important carbon and energy substrates to heterotrophic production in the aquatic environment. We studied the occurrence of dissolved free amino acids (AA), monosaccharides (CHO), and carboxylic acids (CA) in the subarctic Lake Diktar-Erik. The lake is unproductive with slightly humic water, and receives water via one major inlet stream draining a birch forest environment. The concentration of dissolved organic carbon (DOC) in the inlet stream was strongly correlated with the discharge. This relationship changed from season to season, indicating changes in the sources of the DOC entering the stream. AA and CHO each accounted for an average of less than 0.5% of the DOC. After high discharge events during the ice-free period, AA and CHO occurred in especially high concentrations. CA occurred in higher concentrations during the ice-free period, when it generally accounted for 20-30% of the DOC pool. The CA content relative to the total DOC pool was strongly inversely correlated with overall DOC concentration, and at low DOC levels the relative content of CA was high and vice versa. This followed a seasonal trend, with CA accounting for a smaller proportion of the DOC in winter and a larger part in spring/early summer. A conservative estimate suggested that the studied simple organic carbon compounds potentially could cover 30% of the bacterial gross production in the lake and therefore potentially also was an important source of CO2 that occur in supersaturated concentrations in the lake. |
format |
Article in Journal/Newspaper |
author |
Jonsson, Anders Ström, Lena Aberg, Jan |
author_facet |
Jonsson, Anders Ström, Lena Aberg, Jan |
author_sort |
Jonsson, Anders |
title |
Composition and variations in the occurrence of dissolved free simple organic compounds of an unproductive lake ecosystem in northern Sweden |
title_short |
Composition and variations in the occurrence of dissolved free simple organic compounds of an unproductive lake ecosystem in northern Sweden |
title_full |
Composition and variations in the occurrence of dissolved free simple organic compounds of an unproductive lake ecosystem in northern Sweden |
title_fullStr |
Composition and variations in the occurrence of dissolved free simple organic compounds of an unproductive lake ecosystem in northern Sweden |
title_full_unstemmed |
Composition and variations in the occurrence of dissolved free simple organic compounds of an unproductive lake ecosystem in northern Sweden |
title_sort |
composition and variations in the occurrence of dissolved free simple organic compounds of an unproductive lake ecosystem in northern sweden |
publisher |
Springer |
publishDate |
2007 |
url |
https://lup.lub.lu.se/record/677561 https://doi.org/10.1007/s10533-006-9060-4 |
genre |
Northern Sweden Subarctic |
genre_facet |
Northern Sweden Subarctic |
op_source |
Biogeochemistry; 82(2), pp 153-163 (2007) ISSN: 1573-515X |
op_relation |
https://lup.lub.lu.se/record/677561 http://dx.doi.org/10.1007/s10533-006-9060-4 wos:000243554400004 scopus:33846423923 |
op_doi |
https://doi.org/10.1007/s10533-006-9060-4 |
container_title |
Biogeochemistry |
container_volume |
82 |
container_issue |
2 |
container_start_page |
153 |
op_container_end_page |
163 |
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1766147737350307840 |