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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Online Access: | http://hdl.handle.net/10553/11614 https://doi.org/10.1371/journal.pone.0089391 |
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ftunivlaspalmas:oai:https://accedacris.ulpgc.es:10553/11614 2023-05-15T13:44:42+02:00 Krill excretion boosts microbial activity in the Southern Ocean Aristegui, Javier Duarte, Carlos M. Reche, Isabel Gómez-Pinchetti, Juan Luis Duarte, Carlos M Reche, Isabel Aristegui, Javier 227201 20777 676677 4654381 2014-04-25T02:30:44Z PDF http://hdl.handle.net/10553/11614 https://doi.org/10.1371/journal.pone.0089391 spa spa PLoS ONE 1932-6203 http://hdl.handle.net/10553/11614 doi:10.1371/journal.pone.0089391 2-s2.0-84897784040 000331711900138 697276 9 WOS:000331711900138 A-7670-2013 K-7120-2014 D-5833-2013 by-nc-nd info:eu-repo/semantics/openAccess CC-BY-NC-ND Plos One[ISSN 1932-6203],v. 9 (2) 251001 Oceanografía biológica Article info:eu-repo/semantics/article 2014 ftunivlaspalmas https://doi.org/10.1371/journal.pone.0089391 2019-09-08T15:47:46Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Southern Ocean Universidad de Las Palmas de Gran Canaria: Acceda Antarctic Southern Ocean PLoS ONE 9 2 e89391 |
institution |
Open Polar |
collection |
Universidad de Las Palmas de Gran Canaria: Acceda |
op_collection_id |
ftunivlaspalmas |
language |
Spanish |
topic |
251001 Oceanografía biológica |
spellingShingle |
251001 Oceanografía biológica Aristegui, Javier Duarte, Carlos M. Reche, Isabel Gómez-Pinchetti, Juan Luis Krill excretion boosts microbial activity in the Southern Ocean |
topic_facet |
251001 Oceanografía biológica |
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. |
author2 |
Duarte, Carlos M Reche, Isabel Aristegui, Javier 227201 20777 676677 4654381 |
format |
Article in Journal/Newspaper |
author |
Aristegui, Javier Duarte, Carlos M. Reche, Isabel Gómez-Pinchetti, Juan Luis |
author_facet |
Aristegui, Javier Duarte, Carlos M. Reche, Isabel Gómez-Pinchetti, Juan Luis |
author_sort |
Aristegui, 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 |
publishDate |
2014 |
url |
http://hdl.handle.net/10553/11614 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_source |
Plos One[ISSN 1932-6203],v. 9 (2) |
op_relation |
PLoS ONE 1932-6203 http://hdl.handle.net/10553/11614 doi:10.1371/journal.pone.0089391 2-s2.0-84897784040 000331711900138 697276 9 WOS:000331711900138 A-7670-2013 K-7120-2014 D-5833-2013 |
op_rights |
by-nc-nd info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1371/journal.pone.0089391 |
container_title |
PLoS ONE |
container_volume |
9 |
container_issue |
2 |
container_start_page |
e89391 |
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1766204995090251776 |