Determinants of Microbial-Derived Dissolved Organic Matter Diversity in Antarctic Lakes
[Image: see text] Identifying drivers of the molecular composition of dissolved organic matter (DOM) is essential to understand the global carbon cycle, but an unambiguous interpretation of observed patterns is challenging due to the presence of confounding factors that affect the DOM composition. H...
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10077579/ http://www.ncbi.nlm.nih.gov/pubmed/36947486 https://doi.org/10.1021/acs.est.3c00249 |
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ftpubmed:oai:pubmedcentral.nih.gov:10077579 2023-05-15T13:51:50+02:00 Determinants of Microbial-Derived Dissolved Organic Matter Diversity in Antarctic Lakes Kida, Morimaru Merder, Julian Fujitake, Nobuhide Tanabe, Yukiko Hayashi, Kentaro Kudoh, Sakae Dittmar, Thorsten 2023-03-22 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10077579/ http://www.ncbi.nlm.nih.gov/pubmed/36947486 https://doi.org/10.1021/acs.est.3c00249 en eng American Chemical Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10077579/ http://www.ncbi.nlm.nih.gov/pubmed/36947486 http://dx.doi.org/10.1021/acs.est.3c00249 © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). Environ Sci Technol Text 2023 ftpubmed https://doi.org/10.1021/acs.est.3c00249 2023-04-09T01:07:09Z [Image: see text] Identifying drivers of the molecular composition of dissolved organic matter (DOM) is essential to understand the global carbon cycle, but an unambiguous interpretation of observed patterns is challenging due to the presence of confounding factors that affect the DOM composition. Here, we show, by combining ultrahigh-resolution mass spectrometry and nuclear magnetic resonance spectroscopy, that the DOM molecular composition varies considerably among 43 lakes in East Antarctica that are isolated from terrestrial inputs and human influence. The DOM composition in these lakes is primarily driven by differences in the degree of photodegradation, sulfurization, and pH. Remarkable molecular beta-diversity of DOM was found that rivals the dissimilarity between DOM of rivers and the deep ocean, which was driven by environmental dissimilarity rather than the spatial distance. Our results emphasize that the extensive molecular diversity of DOM can arise even in one of the most pristine and organic matter source-limited environments on Earth, but at the same time the DOM composition is predictable by environmental variables and the lakes’ ecological history. Text Antarc* Antarctic Antarctica East Antarctica PubMed Central (PMC) Antarctic East Antarctica Environmental Science & Technology 57 13 5464 5473 |
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English |
description |
[Image: see text] Identifying drivers of the molecular composition of dissolved organic matter (DOM) is essential to understand the global carbon cycle, but an unambiguous interpretation of observed patterns is challenging due to the presence of confounding factors that affect the DOM composition. Here, we show, by combining ultrahigh-resolution mass spectrometry and nuclear magnetic resonance spectroscopy, that the DOM molecular composition varies considerably among 43 lakes in East Antarctica that are isolated from terrestrial inputs and human influence. The DOM composition in these lakes is primarily driven by differences in the degree of photodegradation, sulfurization, and pH. Remarkable molecular beta-diversity of DOM was found that rivals the dissimilarity between DOM of rivers and the deep ocean, which was driven by environmental dissimilarity rather than the spatial distance. Our results emphasize that the extensive molecular diversity of DOM can arise even in one of the most pristine and organic matter source-limited environments on Earth, but at the same time the DOM composition is predictable by environmental variables and the lakes’ ecological history. |
format |
Text |
author |
Kida, Morimaru Merder, Julian Fujitake, Nobuhide Tanabe, Yukiko Hayashi, Kentaro Kudoh, Sakae Dittmar, Thorsten |
spellingShingle |
Kida, Morimaru Merder, Julian Fujitake, Nobuhide Tanabe, Yukiko Hayashi, Kentaro Kudoh, Sakae Dittmar, Thorsten Determinants of Microbial-Derived Dissolved Organic Matter Diversity in Antarctic Lakes |
author_facet |
Kida, Morimaru Merder, Julian Fujitake, Nobuhide Tanabe, Yukiko Hayashi, Kentaro Kudoh, Sakae Dittmar, Thorsten |
author_sort |
Kida, Morimaru |
title |
Determinants of Microbial-Derived Dissolved Organic Matter Diversity in Antarctic Lakes |
title_short |
Determinants of Microbial-Derived Dissolved Organic Matter Diversity in Antarctic Lakes |
title_full |
Determinants of Microbial-Derived Dissolved Organic Matter Diversity in Antarctic Lakes |
title_fullStr |
Determinants of Microbial-Derived Dissolved Organic Matter Diversity in Antarctic Lakes |
title_full_unstemmed |
Determinants of Microbial-Derived Dissolved Organic Matter Diversity in Antarctic Lakes |
title_sort |
determinants of microbial-derived dissolved organic matter diversity in antarctic lakes |
publisher |
American Chemical Society |
publishDate |
2023 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10077579/ http://www.ncbi.nlm.nih.gov/pubmed/36947486 https://doi.org/10.1021/acs.est.3c00249 |
geographic |
Antarctic East Antarctica |
geographic_facet |
Antarctic East Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_source |
Environ Sci Technol |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10077579/ http://www.ncbi.nlm.nih.gov/pubmed/36947486 http://dx.doi.org/10.1021/acs.est.3c00249 |
op_rights |
© 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). |
op_doi |
https://doi.org/10.1021/acs.est.3c00249 |
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Environmental Science & Technology |
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57 |
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13 |
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5464 |
op_container_end_page |
5473 |
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1766255879012745216 |