Efficient aquatic bacterial metabolism of dissolved low-molecular-weight compounds from terrestrial sources
Abstract Carboxylic acids (CAs), amino acids (AAs) and carbohydrates (CHs) in dissolved free forms can be readily assimilated by aquatic bacteria and metabolized at high growth efficiencies. Previous studies have shown that these low-molecular-weight (LMW) substrates are released by phytoplankton bu...
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croxfordunivpr:10.1038/ismej.2009.120 2024-09-30T14:40:18+00:00 Efficient aquatic bacterial metabolism of dissolved low-molecular-weight compounds from terrestrial sources Berggren, Martin Laudon, Hjalmar Haei, Mahsa Ström, Lena Jansson, Mats 2009 http://dx.doi.org/10.1038/ismej.2009.120 http://www.nature.com/articles/ismej2009120.pdf http://www.nature.com/articles/ismej2009120 https://academic.oup.com/ismej/article-pdf/4/3/408/56402399/41396_2010_article_bfismej2009120.pdf en eng Oxford University Press (OUP) https://academic.oup.com/pages/standard-publication-reuse-rights The ISME Journal volume 4, issue 3, page 408-416 ISSN 1751-7362 1751-7370 journal-article 2009 croxfordunivpr https://doi.org/10.1038/ismej.2009.120 2024-09-17T04:29:39Z Abstract Carboxylic acids (CAs), amino acids (AAs) and carbohydrates (CHs) in dissolved free forms can be readily assimilated by aquatic bacteria and metabolized at high growth efficiencies. Previous studies have shown that these low-molecular-weight (LMW) substrates are released by phytoplankton but also that unidentified LMW compounds of terrestrial origin is a subsidy for bacterial metabolism in unproductive freshwater systems. We tested the hypothesis that different terrestrially derived CA, AA and CH compounds can offer substantial support for aquatic bacterial metabolism in fresh waters that are dominated by allochthonous dissolved organic matter (DOM). Drainage water from three catchments of different characters in the Krycklan experimental area in Northern Sweden were studied at the rising and falling limb of the spring flood, using a 2-week bioassay approach. A variety of CA, AA and CH compounds were significantly assimilated by bacteria, meeting 15–100% of the bacterial carbon demand and explaining most of the observed variation in bacterial growth efficiency (BGE; R2=0.66). Of the 29 chemical species that was detected, acetate was the most important, representing 45% of the total bacterial consumption of all LMW compounds. We suggest that LMW organic compounds in boreal spring flood drainage could potentially support all in situ bacterial production in receiving lake waters during periods of weeks to months after the spring flood. Article in Journal/Newspaper Northern Sweden Oxford University Press The ISME Journal 4 3 408 416 |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract Carboxylic acids (CAs), amino acids (AAs) and carbohydrates (CHs) in dissolved free forms can be readily assimilated by aquatic bacteria and metabolized at high growth efficiencies. Previous studies have shown that these low-molecular-weight (LMW) substrates are released by phytoplankton but also that unidentified LMW compounds of terrestrial origin is a subsidy for bacterial metabolism in unproductive freshwater systems. We tested the hypothesis that different terrestrially derived CA, AA and CH compounds can offer substantial support for aquatic bacterial metabolism in fresh waters that are dominated by allochthonous dissolved organic matter (DOM). Drainage water from three catchments of different characters in the Krycklan experimental area in Northern Sweden were studied at the rising and falling limb of the spring flood, using a 2-week bioassay approach. A variety of CA, AA and CH compounds were significantly assimilated by bacteria, meeting 15–100% of the bacterial carbon demand and explaining most of the observed variation in bacterial growth efficiency (BGE; R2=0.66). Of the 29 chemical species that was detected, acetate was the most important, representing 45% of the total bacterial consumption of all LMW compounds. We suggest that LMW organic compounds in boreal spring flood drainage could potentially support all in situ bacterial production in receiving lake waters during periods of weeks to months after the spring flood. |
format |
Article in Journal/Newspaper |
author |
Berggren, Martin Laudon, Hjalmar Haei, Mahsa Ström, Lena Jansson, Mats |
spellingShingle |
Berggren, Martin Laudon, Hjalmar Haei, Mahsa Ström, Lena Jansson, Mats Efficient aquatic bacterial metabolism of dissolved low-molecular-weight compounds from terrestrial sources |
author_facet |
Berggren, Martin Laudon, Hjalmar Haei, Mahsa Ström, Lena Jansson, Mats |
author_sort |
Berggren, Martin |
title |
Efficient aquatic bacterial metabolism of dissolved low-molecular-weight compounds from terrestrial sources |
title_short |
Efficient aquatic bacterial metabolism of dissolved low-molecular-weight compounds from terrestrial sources |
title_full |
Efficient aquatic bacterial metabolism of dissolved low-molecular-weight compounds from terrestrial sources |
title_fullStr |
Efficient aquatic bacterial metabolism of dissolved low-molecular-weight compounds from terrestrial sources |
title_full_unstemmed |
Efficient aquatic bacterial metabolism of dissolved low-molecular-weight compounds from terrestrial sources |
title_sort |
efficient aquatic bacterial metabolism of dissolved low-molecular-weight compounds from terrestrial sources |
publisher |
Oxford University Press (OUP) |
publishDate |
2009 |
url |
http://dx.doi.org/10.1038/ismej.2009.120 http://www.nature.com/articles/ismej2009120.pdf http://www.nature.com/articles/ismej2009120 https://academic.oup.com/ismej/article-pdf/4/3/408/56402399/41396_2010_article_bfismej2009120.pdf |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_source |
The ISME Journal volume 4, issue 3, page 408-416 ISSN 1751-7362 1751-7370 |
op_rights |
https://academic.oup.com/pages/standard-publication-reuse-rights |
op_doi |
https://doi.org/10.1038/ismej.2009.120 |
container_title |
The ISME Journal |
container_volume |
4 |
container_issue |
3 |
container_start_page |
408 |
op_container_end_page |
416 |
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1811642800930816000 |