Krill Excretion Boosts Microbial Activity in the Southern Ocean
Antarctic krill are known to release large amounts of inorganic and organic nutrients to the water column. Here we test the role of krill excretion of dissolved products in stimulating heterotrophic bacteria on the basis of three experiments where ammonium and organic excretory products released by...
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ftpubmed:oai:pubmedcentral.nih.gov:3929700 2023-05-15T13:52:38+02:00 Krill Excretion Boosts Microbial Activity in the Southern Ocean Arístegui, Javier Duarte, Carlos M. Reche, Isabel Gómez-Pinchetti, Juan L. 2014-02-19 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3929700 https://doi.org/10.1371/journal.pone.0089391 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3929700 http://dx.doi.org/10.1371/journal.pone.0089391 This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. CC-BY Research Article Text 2014 ftpubmed https://doi.org/10.1371/journal.pone.0089391 2014-03-02T02:08:43Z Antarctic krill are known to release large amounts of inorganic and organic nutrients to the water column. Here we test the role of krill excretion of dissolved products in stimulating heterotrophic bacteria on the basis of three experiments where ammonium and organic excretory products released by krill were added to bacterial assemblages, free of grazers. Our results demonstrate that the addition of krill excretion products (but not of ammonium alone), at levels expected in krill swarms, greatly stimulates bacteria resulting in an order-of-magnitude increase in growth and production. Furthermore, they suggest that bacterial growth rate in the Southern Ocean is suppressed well below their potential by resource limitation. Enhanced bacterial activity in the presence of krill, which are major sources of DOC in the Southern Ocean, would further increase recycling processes associated with krill activity, resulting in highly efficient krill-bacterial recycling that should be conducive to stimulating periods of high primary productivity in the Southern Ocean. Text Antarc* Antarctic Antarctic Krill Southern Ocean PubMed Central (PMC) Antarctic Southern Ocean PLoS ONE 9 2 e89391 |
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English |
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Research Article |
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Research Article Arístegui, Javier Duarte, Carlos M. Reche, Isabel Gómez-Pinchetti, Juan L. Krill Excretion Boosts Microbial Activity in the Southern Ocean |
topic_facet |
Research Article |
description |
Antarctic krill are known to release large amounts of inorganic and organic nutrients to the water column. Here we test the role of krill excretion of dissolved products in stimulating heterotrophic bacteria on the basis of three experiments where ammonium and organic excretory products released by krill were added to bacterial assemblages, free of grazers. Our results demonstrate that the addition of krill excretion products (but not of ammonium alone), at levels expected in krill swarms, greatly stimulates bacteria resulting in an order-of-magnitude increase in growth and production. Furthermore, they suggest that bacterial growth rate in the Southern Ocean is suppressed well below their potential by resource limitation. Enhanced bacterial activity in the presence of krill, which are major sources of DOC in the Southern Ocean, would further increase recycling processes associated with krill activity, resulting in highly efficient krill-bacterial recycling that should be conducive to stimulating periods of high primary productivity in the Southern Ocean. |
format |
Text |
author |
Arístegui, Javier Duarte, Carlos M. Reche, Isabel Gómez-Pinchetti, Juan L. |
author_facet |
Arístegui, Javier Duarte, Carlos M. Reche, Isabel Gómez-Pinchetti, Juan L. |
author_sort |
Arístegui, Javier |
title |
Krill Excretion Boosts Microbial Activity in the Southern Ocean |
title_short |
Krill Excretion Boosts Microbial Activity in the Southern Ocean |
title_full |
Krill Excretion Boosts Microbial Activity in the Southern Ocean |
title_fullStr |
Krill Excretion Boosts Microbial Activity in the Southern Ocean |
title_full_unstemmed |
Krill Excretion Boosts Microbial Activity in the Southern Ocean |
title_sort |
krill excretion boosts microbial activity in the southern ocean |
publisher |
Public Library of Science |
publishDate |
2014 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3929700 https://doi.org/10.1371/journal.pone.0089391 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctic Krill Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Southern Ocean |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3929700 http://dx.doi.org/10.1371/journal.pone.0089391 |
op_rights |
This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
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CC-BY |
op_doi |
https://doi.org/10.1371/journal.pone.0089391 |
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PLoS ONE |
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e89391 |
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