Dissolved Organic Matter Processing in Pristine Antarctic Streams
Accelerated glacier melt and runoff may lead to inputs of labile dissolved organic matter (DOM) to downstream ecosystems and stimulate the associated biogeochemical processes. However, still little is known about glacial DOM composition and its downstream processing before entering the ocean, althou...
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Online Access: | https://epic.awi.de/id/eprint/54751/ https://epic.awi.de/id/eprint/54751/1/acsest1c03163.pdf https://doi.org/10.1021/acs.est.1c03163 https://hdl.handle.net/10013/epic.684dc26d-cc96-451f-9878-1e0610f9cb24 |
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ftawi:oai:epic.awi.de:54751 2024-09-15T17:44:16+00:00 Dissolved Organic Matter Processing in Pristine Antarctic Streams Kida, Morimaru Fujitake, Nobuhide Kojima, Taichi Tanabe, Yukiko Hayashi, Kentaro Kudoh, Sakae Dittmar, Thorsten 2021-07 application/pdf https://epic.awi.de/id/eprint/54751/ https://epic.awi.de/id/eprint/54751/1/acsest1c03163.pdf https://doi.org/10.1021/acs.est.1c03163 https://hdl.handle.net/10013/epic.684dc26d-cc96-451f-9878-1e0610f9cb24 unknown https://epic.awi.de/id/eprint/54751/1/acsest1c03163.pdf Kida, M. , Fujitake, N. , Kojima, T. , Tanabe, Y. , Hayashi, K. , Kudoh, S. and Dittmar, T. orcid:0000-0002-3462-0107 (2021) Dissolved Organic Matter Processing in Pristine Antarctic Streams , Environmental Science & Technology, 55 (14), pp. 10175-10185 . doi:10.1021/acs.est.1c03163 <https://doi.org/10.1021/acs.est.1c03163> , hdl:10013/epic.684dc26d-cc96-451f-9878-1e0610f9cb24 EPIC3Environmental Science & Technology, 55(14), pp. 10175-10185, ISSN: 0013-936X Article isiRev 2021 ftawi https://doi.org/10.1021/acs.est.1c03163 2024-06-24T04:27:29Z Accelerated glacier melt and runoff may lead to inputs of labile dissolved organic matter (DOM) to downstream ecosystems and stimulate the associated biogeochemical processes. However, still little is known about glacial DOM composition and its downstream processing before entering the ocean, although the function of DOM in food webs and ecosystems largely depends on its composition. Here, we employ a set of molecular and optical techniques (UV–vis absorption and fluorescence spectroscopy, 1H NMR, and ultrahigh-resolution mass spectrometry) to elucidate the composition of DOM in Antarctic glacial streams and its downstream change. Glacial DOM consisted largely of a mixture of small microbial-derived biomolecules. 1H NMR analysis of bulk water revealed that these small molecules were processed downstream into more complex, structurally unrecognizable molecules. The extent of processing varied between streams. By applying multivariate statistical (compositional data) analysis of the DOM molecular data, we identified molecular compounds that were tightly associated and moved in parallel in the glacial streams. Lakes in the middle of the flow paths enhanced water residence time and allowed for both more DOM processing and production. In conclusion, downstream processing of glacial DOM is substantial in Antarctica and affects the amounts of biologically labile substrates that enter the ocean. Article in Journal/Newspaper Antarc* Antarctic Antarctica Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Environmental Science & Technology 55 14 10175 10185 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Accelerated glacier melt and runoff may lead to inputs of labile dissolved organic matter (DOM) to downstream ecosystems and stimulate the associated biogeochemical processes. However, still little is known about glacial DOM composition and its downstream processing before entering the ocean, although the function of DOM in food webs and ecosystems largely depends on its composition. Here, we employ a set of molecular and optical techniques (UV–vis absorption and fluorescence spectroscopy, 1H NMR, and ultrahigh-resolution mass spectrometry) to elucidate the composition of DOM in Antarctic glacial streams and its downstream change. Glacial DOM consisted largely of a mixture of small microbial-derived biomolecules. 1H NMR analysis of bulk water revealed that these small molecules were processed downstream into more complex, structurally unrecognizable molecules. The extent of processing varied between streams. By applying multivariate statistical (compositional data) analysis of the DOM molecular data, we identified molecular compounds that were tightly associated and moved in parallel in the glacial streams. Lakes in the middle of the flow paths enhanced water residence time and allowed for both more DOM processing and production. In conclusion, downstream processing of glacial DOM is substantial in Antarctica and affects the amounts of biologically labile substrates that enter the ocean. |
format |
Article in Journal/Newspaper |
author |
Kida, Morimaru Fujitake, Nobuhide Kojima, Taichi Tanabe, Yukiko Hayashi, Kentaro Kudoh, Sakae Dittmar, Thorsten |
spellingShingle |
Kida, Morimaru Fujitake, Nobuhide Kojima, Taichi Tanabe, Yukiko Hayashi, Kentaro Kudoh, Sakae Dittmar, Thorsten Dissolved Organic Matter Processing in Pristine Antarctic Streams |
author_facet |
Kida, Morimaru Fujitake, Nobuhide Kojima, Taichi Tanabe, Yukiko Hayashi, Kentaro Kudoh, Sakae Dittmar, Thorsten |
author_sort |
Kida, Morimaru |
title |
Dissolved Organic Matter Processing in Pristine Antarctic Streams |
title_short |
Dissolved Organic Matter Processing in Pristine Antarctic Streams |
title_full |
Dissolved Organic Matter Processing in Pristine Antarctic Streams |
title_fullStr |
Dissolved Organic Matter Processing in Pristine Antarctic Streams |
title_full_unstemmed |
Dissolved Organic Matter Processing in Pristine Antarctic Streams |
title_sort |
dissolved organic matter processing in pristine antarctic streams |
publishDate |
2021 |
url |
https://epic.awi.de/id/eprint/54751/ https://epic.awi.de/id/eprint/54751/1/acsest1c03163.pdf https://doi.org/10.1021/acs.est.1c03163 https://hdl.handle.net/10013/epic.684dc26d-cc96-451f-9878-1e0610f9cb24 |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
EPIC3Environmental Science & Technology, 55(14), pp. 10175-10185, ISSN: 0013-936X |
op_relation |
https://epic.awi.de/id/eprint/54751/1/acsest1c03163.pdf Kida, M. , Fujitake, N. , Kojima, T. , Tanabe, Y. , Hayashi, K. , Kudoh, S. and Dittmar, T. orcid:0000-0002-3462-0107 (2021) Dissolved Organic Matter Processing in Pristine Antarctic Streams , Environmental Science & Technology, 55 (14), pp. 10175-10185 . doi:10.1021/acs.est.1c03163 <https://doi.org/10.1021/acs.est.1c03163> , hdl:10013/epic.684dc26d-cc96-451f-9878-1e0610f9cb24 |
op_doi |
https://doi.org/10.1021/acs.est.1c03163 |
container_title |
Environmental Science & Technology |
container_volume |
55 |
container_issue |
14 |
container_start_page |
10175 |
op_container_end_page |
10185 |
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1810491690501275648 |