Antarctic Krill Are Reservoirs for Distinct Southern Ocean Microbial Communities
Host-associated bacterial communities have received limited attention in polar habitats, but are likely to represent distinct nutrient-rich niches compared to the surrounding environment. Antarctic krill (Euphausia superba) are a super-abundant species with a circumpolar distribution, and the krill...
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ftpubmed:oai:pubmedcentral.nih.gov:6340936 2023-05-15T13:37:11+02:00 Antarctic Krill Are Reservoirs for Distinct Southern Ocean Microbial Communities Clarke, Laurence J. Suter, Léonie King, Robert Bissett, Andrew Deagle, Bruce E. 2019-01-15 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6340936/ http://www.ncbi.nlm.nih.gov/pubmed/30697197 https://doi.org/10.3389/fmicb.2018.03226 en eng Frontiers Media S.A. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6340936/ http://www.ncbi.nlm.nih.gov/pubmed/30697197 http://dx.doi.org/10.3389/fmicb.2018.03226 Copyright © 2019 Clarke, Suter, King, Bissett and Deagle. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. CC-BY Microbiology Text 2019 ftpubmed https://doi.org/10.3389/fmicb.2018.03226 2019-02-03T01:31:31Z Host-associated bacterial communities have received limited attention in polar habitats, but are likely to represent distinct nutrient-rich niches compared to the surrounding environment. Antarctic krill (Euphausia superba) are a super-abundant species with a circumpolar distribution, and the krill microbiome may make a substantial contribution to marine bacterial diversity in the Southern Ocean. We used high-throughput sequencing of the bacterial 16S ribosomal RNA gene to characterize bacterial diversity in seawater and krill tissue samples from four locations south of the Kerguelen Plateau, one of the most productive regions in the Indian Sector of the Southern Ocean. Krill-associated bacterial communities were distinct from those of the surrounding seawater, with different communities inhabiting the moults, digestive tract and faecal pellets, including several phyla not detected in the surrounding seawater. Digestive tissues from many individuals contained a potential gut symbiont (order: Mycoplasmoidales) shown to improve survival on a low quality diet in other crustaceans. Antarctic krill swarms thus influence Southern Ocean microbial communities not only through top-down grazing of eukaryotic cells and release of nutrients into the water column, but also by transporting distinct microbial assemblages horizontally via migration and vertically via sinking faecal pellets and moulted exuviae. Changes to Antarctic krill demographics or distribution through fishing pressure or climate-induced range shifts will also influence the composition and dispersal of Southern Ocean microbial communities. Text Antarc* Antarctic Antarctic Krill Euphausia superba Southern Ocean PubMed Central (PMC) Antarctic Indian Kerguelen Southern Ocean Frontiers in Microbiology 9 |
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PubMed Central (PMC) |
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English |
topic |
Microbiology |
spellingShingle |
Microbiology Clarke, Laurence J. Suter, Léonie King, Robert Bissett, Andrew Deagle, Bruce E. Antarctic Krill Are Reservoirs for Distinct Southern Ocean Microbial Communities |
topic_facet |
Microbiology |
description |
Host-associated bacterial communities have received limited attention in polar habitats, but are likely to represent distinct nutrient-rich niches compared to the surrounding environment. Antarctic krill (Euphausia superba) are a super-abundant species with a circumpolar distribution, and the krill microbiome may make a substantial contribution to marine bacterial diversity in the Southern Ocean. We used high-throughput sequencing of the bacterial 16S ribosomal RNA gene to characterize bacterial diversity in seawater and krill tissue samples from four locations south of the Kerguelen Plateau, one of the most productive regions in the Indian Sector of the Southern Ocean. Krill-associated bacterial communities were distinct from those of the surrounding seawater, with different communities inhabiting the moults, digestive tract and faecal pellets, including several phyla not detected in the surrounding seawater. Digestive tissues from many individuals contained a potential gut symbiont (order: Mycoplasmoidales) shown to improve survival on a low quality diet in other crustaceans. Antarctic krill swarms thus influence Southern Ocean microbial communities not only through top-down grazing of eukaryotic cells and release of nutrients into the water column, but also by transporting distinct microbial assemblages horizontally via migration and vertically via sinking faecal pellets and moulted exuviae. Changes to Antarctic krill demographics or distribution through fishing pressure or climate-induced range shifts will also influence the composition and dispersal of Southern Ocean microbial communities. |
format |
Text |
author |
Clarke, Laurence J. Suter, Léonie King, Robert Bissett, Andrew Deagle, Bruce E. |
author_facet |
Clarke, Laurence J. Suter, Léonie King, Robert Bissett, Andrew Deagle, Bruce E. |
author_sort |
Clarke, Laurence J. |
title |
Antarctic Krill Are Reservoirs for Distinct Southern Ocean Microbial Communities |
title_short |
Antarctic Krill Are Reservoirs for Distinct Southern Ocean Microbial Communities |
title_full |
Antarctic Krill Are Reservoirs for Distinct Southern Ocean Microbial Communities |
title_fullStr |
Antarctic Krill Are Reservoirs for Distinct Southern Ocean Microbial Communities |
title_full_unstemmed |
Antarctic Krill Are Reservoirs for Distinct Southern Ocean Microbial Communities |
title_sort |
antarctic krill are reservoirs for distinct southern ocean microbial communities |
publisher |
Frontiers Media S.A. |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6340936/ http://www.ncbi.nlm.nih.gov/pubmed/30697197 https://doi.org/10.3389/fmicb.2018.03226 |
geographic |
Antarctic Indian Kerguelen Southern Ocean |
geographic_facet |
Antarctic Indian Kerguelen Southern Ocean |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba Southern Ocean |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6340936/ http://www.ncbi.nlm.nih.gov/pubmed/30697197 http://dx.doi.org/10.3389/fmicb.2018.03226 |
op_rights |
Copyright © 2019 Clarke, Suter, King, Bissett and Deagle. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmicb.2018.03226 |
container_title |
Frontiers in Microbiology |
container_volume |
9 |
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1766088980592328704 |