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...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Javier Arístegui, Carlos M Duarte, Isabel Reche, Juan L Gómez-Pinchetti
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/26ccdf509e8f4e8fa32748371a041390
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:26ccdf509e8f4e8fa32748371a041390
record_format	dspace
spelling	oai:doaj.org-article:26ccdf509e8f4e8fa32748371a0413902021-11-18T08:31:55ZKrill excretion boosts microbial activity in the Southern Ocean.1932-620310.1371/journal.pone.0089391https://doaj.org/article/26ccdf509e8f4e8fa32748371a0413902014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24586744/?tool=EBIhttps://doaj.org/toc/1932-6203Antarctic 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.Javier ArísteguiCarlos M DuarteIsabel RecheJuan L Gómez-PinchettiPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 2, p e89391 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Javier Arístegui Carlos M Duarte Isabel Reche Juan L Gómez-Pinchetti Krill excretion boosts microbial activity in the Southern Ocean.
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	article
author	Javier Arístegui Carlos M Duarte Isabel Reche Juan L Gómez-Pinchetti
author_facet	Javier Arístegui Carlos M Duarte Isabel Reche Juan L Gómez-Pinchetti
author_sort	Javier Arístegui
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 (PLoS)
publishDate	2014
url	https://doaj.org/article/26ccdf509e8f4e8fa32748371a041390
work_keys_str_mv	AT javieraristegui krillexcretionboostsmicrobialactivityinthesouthernocean AT carlosmduarte krillexcretionboostsmicrobialactivityinthesouthernocean AT isabelreche krillexcretionboostsmicrobialactivityinthesouthernocean AT juanlgomezpinchetti krillexcretionboostsmicrobialactivityinthesouthernocean
_version_	1718421673011576832

Krill excretion boosts microbial activity in the Southern Ocean.

Ejemplares similares