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...
Published in: | Frontiers in Microbiology |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Frontiers Research Foundation
2019
|
Subjects: | |
Online Access: | https://eprints.utas.edu.au/41473/ https://eprints.utas.edu.au/41473/1/130401%20-%20Antarctic%20krill%20are%20reservoirs%20for%20distinct%20Southern%20Ocean%20microbial%20communities.pdf |
id |
ftunivtasmania:oai:eprints.utas.edu.au:41473 |
---|---|
record_format |
openpolar |
spelling |
ftunivtasmania:oai:eprints.utas.edu.au:41473 2023-05-15T13:41:50+02:00 Antarctic krill are reservoirs for distinct Southern Ocean microbial communities Clarke, LC Suter, L King, R Bissett, A Deagle, BE 2019 application/pdf https://eprints.utas.edu.au/41473/ https://eprints.utas.edu.au/41473/1/130401%20-%20Antarctic%20krill%20are%20reservoirs%20for%20distinct%20Southern%20Ocean%20microbial%20communities.pdf en eng Frontiers Research Foundation https://eprints.utas.edu.au/41473/1/130401%20-%20Antarctic%20krill%20are%20reservoirs%20for%20distinct%20Southern%20Ocean%20microbial%20communities.pdf Clarke, LC orcid:0000-0002-0844-4453 , Suter, L, King, R, Bissett, A and Deagle, BE 2019 , 'Antarctic krill are reservoirs for distinct Southern Ocean microbial communities' , Frontiers in Microbiology, vol. 9 , pp. 1-9 , doi:10.3389/fmicb.2018.03226 <http://dx.doi.org/10.3389/fmicb.2018.03226>. Antarctic krill Euphausia superba Southern Ocean microbiome high-throughput DNA sequencing 16S rRNA Article PeerReviewed 2019 ftunivtasmania https://doi.org/10.3389/fmicb.2018.03226 2022-01-31T23:18:13Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba Southern Ocean University of Tasmania: UTas ePrints Antarctic Southern Ocean Kerguelen Indian Frontiers in Microbiology 9 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
Antarctic krill Euphausia superba Southern Ocean microbiome high-throughput DNA sequencing 16S rRNA |
spellingShingle |
Antarctic krill Euphausia superba Southern Ocean microbiome high-throughput DNA sequencing 16S rRNA Clarke, LC Suter, L King, R Bissett, A Deagle, BE Antarctic krill are reservoirs for distinct Southern Ocean microbial communities |
topic_facet |
Antarctic krill Euphausia superba Southern Ocean microbiome high-throughput DNA sequencing 16S rRNA |
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 |
Article in Journal/Newspaper |
author |
Clarke, LC Suter, L King, R Bissett, A Deagle, BE |
author_facet |
Clarke, LC Suter, L King, R Bissett, A Deagle, BE |
author_sort |
Clarke, LC |
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 Research Foundation |
publishDate |
2019 |
url |
https://eprints.utas.edu.au/41473/ https://eprints.utas.edu.au/41473/1/130401%20-%20Antarctic%20krill%20are%20reservoirs%20for%20distinct%20Southern%20Ocean%20microbial%20communities.pdf |
geographic |
Antarctic Southern Ocean Kerguelen Indian |
geographic_facet |
Antarctic Southern Ocean Kerguelen Indian |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba Southern Ocean |
op_relation |
https://eprints.utas.edu.au/41473/1/130401%20-%20Antarctic%20krill%20are%20reservoirs%20for%20distinct%20Southern%20Ocean%20microbial%20communities.pdf Clarke, LC orcid:0000-0002-0844-4453 , Suter, L, King, R, Bissett, A and Deagle, BE 2019 , 'Antarctic krill are reservoirs for distinct Southern Ocean microbial communities' , Frontiers in Microbiology, vol. 9 , pp. 1-9 , doi:10.3389/fmicb.2018.03226 <http://dx.doi.org/10.3389/fmicb.2018.03226>. |
op_doi |
https://doi.org/10.3389/fmicb.2018.03226 |
container_title |
Frontiers in Microbiology |
container_volume |
9 |
_version_ |
1766158643440386048 |