Aquatic fulvic acids in microbially based ecosystems: Results from two desert lakes in Antarctica
We characterized fulvic acids from two Antarctic lakes to determine the chemical characteristics of dissolved fulvic acid derived from organic material of microbial origin. These lakes receive very limited inputs of organic material from the surrounding barren desert, but they sustain algal and bact...
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crwiley:10.4319/lo.1991.36.5.0998 2024-09-15T17:46:43+00:00 Aquatic fulvic acids in microbially based ecosystems: Results from two desert lakes in Antarctica McKnight, Diane M. Aiken, George R. Smith, Richard L. 1991 http://dx.doi.org/10.4319/lo.1991.36.5.0998 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1991.36.5.0998 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1991.36.5.0998 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 36, issue 5, page 998-1006 ISSN 0024-3590 1939-5590 journal-article 1991 crwiley https://doi.org/10.4319/lo.1991.36.5.0998 2024-08-13T04:18:34Z We characterized fulvic acids from two Antarctic lakes to determine the chemical characteristics of dissolved fulvic acid derived from organic material of microbial origin. These lakes receive very limited inputs of organic material from the surrounding barren desert, but they sustain algal and bacterial populations under permanent ice cover. One lake has an extensive anoxic zone and high salinities; the other is oxic and has low salinities. Despite these differences, fulvic acids from both lakes had similar elemental compositions, carbon distributions, and amino acid contents, indicating that the chemistry of microbially derived fulvic acids is not strongly influenced by chemical conditions in the water column. Compared to fulvic acids from other natural waters, these fulvic acids have low C : N atomic ratios (19–25) and low contents of aromatic carbons (5–7% of total carbon atoms); they are most similar to marine fulvic acids. Article in Journal/Newspaper Antarc* Antarctic Antarctica Wiley Online Library Limnology and Oceanography 36 5 998 1006 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
We characterized fulvic acids from two Antarctic lakes to determine the chemical characteristics of dissolved fulvic acid derived from organic material of microbial origin. These lakes receive very limited inputs of organic material from the surrounding barren desert, but they sustain algal and bacterial populations under permanent ice cover. One lake has an extensive anoxic zone and high salinities; the other is oxic and has low salinities. Despite these differences, fulvic acids from both lakes had similar elemental compositions, carbon distributions, and amino acid contents, indicating that the chemistry of microbially derived fulvic acids is not strongly influenced by chemical conditions in the water column. Compared to fulvic acids from other natural waters, these fulvic acids have low C : N atomic ratios (19–25) and low contents of aromatic carbons (5–7% of total carbon atoms); they are most similar to marine fulvic acids. |
format |
Article in Journal/Newspaper |
author |
McKnight, Diane M. Aiken, George R. Smith, Richard L. |
spellingShingle |
McKnight, Diane M. Aiken, George R. Smith, Richard L. Aquatic fulvic acids in microbially based ecosystems: Results from two desert lakes in Antarctica |
author_facet |
McKnight, Diane M. Aiken, George R. Smith, Richard L. |
author_sort |
McKnight, Diane M. |
title |
Aquatic fulvic acids in microbially based ecosystems: Results from two desert lakes in Antarctica |
title_short |
Aquatic fulvic acids in microbially based ecosystems: Results from two desert lakes in Antarctica |
title_full |
Aquatic fulvic acids in microbially based ecosystems: Results from two desert lakes in Antarctica |
title_fullStr |
Aquatic fulvic acids in microbially based ecosystems: Results from two desert lakes in Antarctica |
title_full_unstemmed |
Aquatic fulvic acids in microbially based ecosystems: Results from two desert lakes in Antarctica |
title_sort |
aquatic fulvic acids in microbially based ecosystems: results from two desert lakes in antarctica |
publisher |
Wiley |
publishDate |
1991 |
url |
http://dx.doi.org/10.4319/lo.1991.36.5.0998 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1991.36.5.0998 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1991.36.5.0998 |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Limnology and Oceanography volume 36, issue 5, page 998-1006 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.1991.36.5.0998 |
container_title |
Limnology and Oceanography |
container_volume |
36 |
container_issue |
5 |
container_start_page |
998 |
op_container_end_page |
1006 |
_version_ |
1810495056140828672 |