The University of Southampton
University of Southampton Institutional Repository

Stratified prokaryote network in the oxic-anoxic transition of a deep-sea halocline

Stratified prokaryote network in the oxic-anoxic transition of a deep-sea halocline
Stratified prokaryote network in the oxic-anoxic transition of a deep-sea halocline
The chemical composition of the Bannock basin has been studied in some detail1, 2. We recently showed that unusual microbial populations, including a new division of Archaea (MSBL1)3, inhabit the NaCl-rich hypersaline brine. High salinities tend to reduce biodiversity4, but when brines come into contact with fresher water the natural haloclines formed frequently contain gradients of other chemicals, including permutations of electron donors and acceptors, that may enhance microbial diversity, activity and biogeochemical cycling5, 6. Here we report a 2.5-m-thick chemocline with a steep NaCl gradient at 3.3 km within the water column betweeen Bannock anoxic hypersaline brine7 and overlying sea water. The chemocline supports some of the most biomass-rich and active microbial communities in the deep sea, dominated by Bacteria rather than Archaea, and including four major new divisions of Bacteria. Significantly higher metabolic activities were measured in the chemocline than in the overlying sea water and underlying brine; functional analyses indicate that a range of biological processes is likely to occur in the chemocline. Many prokaryotic taxa, including the phylogenetically new groups, were confined to defined salinities, and collectively formed a diverse, sharply stratified, deep-sea ecosystem with sufficient biomass to potentially contribute to organic geological deposits.
0028-0836
203-207
Daffonchio, D.
39fa8188-c755-4a81-a1d0-bb68eb38cf93
Borin, S.
2bb69d02-8588-4fbc-a45f-8c6103932dac
Brusa, T.
5f85364e-35cb-40cd-bc61-f5e215ffcca6
Brusetti, L.
88ffe9b7-c010-4738-96b4-c28f70a0b1ff
van der Wielen, P.W.J.J.
ee9ce343-2092-4872-9c7a-047c9def0ba0
Bolhuis, H.
82b38291-70cf-4868-bbc0-39e93146dc0e
Yakimov, M.M.
2898fba9-ec24-4dd1-ae62-83360629f1c7
D'Auria, G.
e49f9cfb-7a3d-47a8-a29b-02c8b9435593
Marty, D.
e4f27d09-d04f-49aa-978e-4507e18171f8
Giuliano, L.
ba4f7d9d-02bc-467f-8940-b336c955e89d
Tamburini, C.
b3a0b89c-dee0-46d2-920c-f686935a0a69
McGenity, T.J.
ccee9b1a-35f7-4a8e-b1eb-7f6eb25fb2b6
Hallsworth, J.E.
dfeaa41d-2c9f-4b25-af5e-ee864f819b7a
Sass, A.M.
88101f32-b50e-45b2-a92b-587a0bfb613a
Timmis, K.
74d5435d-f8a9-42c0-9e27-0fe545a1b4d4
Tselepides, A.
a402073c-c593-46ef-8e44-f0f01f14ae53
de Lange, G.J.
f3a5a890-cb53-44e6-b3b0-77f53bc04dac
Hubner, A.
bc7e5641-fccb-4810-ab41-752e985ccc1f
Thomson, J.
3395054f-e507-4841-9758-a06ed37f7d6b
Varnavas, S.P.
9d8247ae-1711-48a3-92b8-350aff634a20
Gasperoni, F.
2eb2564e-2bea-4f1c-9ce8-ea004e2a1307
Gerber, H.W.
c4236d98-35ef-47b8-ae1c-ee37ef16efca
Malinverno, E.
e0945765-7061-4ea4-8ebc-f0bd7b43d5c6
Corselli, C.
7ecf6c67-cd5c-46cd-bbfb-666fe171f453
Daffonchio, D.
39fa8188-c755-4a81-a1d0-bb68eb38cf93
Borin, S.
2bb69d02-8588-4fbc-a45f-8c6103932dac
Brusa, T.
5f85364e-35cb-40cd-bc61-f5e215ffcca6
Brusetti, L.
88ffe9b7-c010-4738-96b4-c28f70a0b1ff
van der Wielen, P.W.J.J.
ee9ce343-2092-4872-9c7a-047c9def0ba0
Bolhuis, H.
82b38291-70cf-4868-bbc0-39e93146dc0e
Yakimov, M.M.
2898fba9-ec24-4dd1-ae62-83360629f1c7
D'Auria, G.
e49f9cfb-7a3d-47a8-a29b-02c8b9435593
Marty, D.
e4f27d09-d04f-49aa-978e-4507e18171f8
Giuliano, L.
ba4f7d9d-02bc-467f-8940-b336c955e89d
Tamburini, C.
b3a0b89c-dee0-46d2-920c-f686935a0a69
McGenity, T.J.
ccee9b1a-35f7-4a8e-b1eb-7f6eb25fb2b6
Hallsworth, J.E.
dfeaa41d-2c9f-4b25-af5e-ee864f819b7a
Sass, A.M.
88101f32-b50e-45b2-a92b-587a0bfb613a
Timmis, K.
74d5435d-f8a9-42c0-9e27-0fe545a1b4d4
Tselepides, A.
a402073c-c593-46ef-8e44-f0f01f14ae53
de Lange, G.J.
f3a5a890-cb53-44e6-b3b0-77f53bc04dac
Hubner, A.
bc7e5641-fccb-4810-ab41-752e985ccc1f
Thomson, J.
3395054f-e507-4841-9758-a06ed37f7d6b
Varnavas, S.P.
9d8247ae-1711-48a3-92b8-350aff634a20
Gasperoni, F.
2eb2564e-2bea-4f1c-9ce8-ea004e2a1307
Gerber, H.W.
c4236d98-35ef-47b8-ae1c-ee37ef16efca
Malinverno, E.
e0945765-7061-4ea4-8ebc-f0bd7b43d5c6
Corselli, C.
7ecf6c67-cd5c-46cd-bbfb-666fe171f453

Daffonchio, D., Borin, S., Brusa, T., Brusetti, L., van der Wielen, P.W.J.J., Bolhuis, H., Yakimov, M.M., D'Auria, G., Marty, D., Giuliano, L., Tamburini, C., McGenity, T.J., Hallsworth, J.E., Sass, A.M., Timmis, K., Tselepides, A., de Lange, G.J., Hubner, A., Thomson, J., Varnavas, S.P., Gasperoni, F., Gerber, H.W., Malinverno, E. and Corselli, C. (2006) Stratified prokaryote network in the oxic-anoxic transition of a deep-sea halocline. Nature, 440 (7081), 203-207. (doi:10.1038/nature04418).

Record type: Article

Abstract

The chemical composition of the Bannock basin has been studied in some detail1, 2. We recently showed that unusual microbial populations, including a new division of Archaea (MSBL1)3, inhabit the NaCl-rich hypersaline brine. High salinities tend to reduce biodiversity4, but when brines come into contact with fresher water the natural haloclines formed frequently contain gradients of other chemicals, including permutations of electron donors and acceptors, that may enhance microbial diversity, activity and biogeochemical cycling5, 6. Here we report a 2.5-m-thick chemocline with a steep NaCl gradient at 3.3 km within the water column betweeen Bannock anoxic hypersaline brine7 and overlying sea water. The chemocline supports some of the most biomass-rich and active microbial communities in the deep sea, dominated by Bacteria rather than Archaea, and including four major new divisions of Bacteria. Significantly higher metabolic activities were measured in the chemocline than in the overlying sea water and underlying brine; functional analyses indicate that a range of biological processes is likely to occur in the chemocline. Many prokaryotic taxa, including the phylogenetically new groups, were confined to defined salinities, and collectively formed a diverse, sharply stratified, deep-sea ecosystem with sufficient biomass to potentially contribute to organic geological deposits.

Full text not available from this repository.

More information

Published date: 2006

Identifiers

Local EPrints ID: 25095
URI: https://eprints.soton.ac.uk/id/eprint/25095
ISSN: 0028-0836
PURE UUID: 281c7318-2594-4693-8b16-de59e2026fa5

Catalogue record

Date deposited: 03 Apr 2006
Last modified: 17 Jul 2017 16:12

Export record

Altmetrics

Contributors

Author: D. Daffonchio
Author: S. Borin
Author: T. Brusa
Author: L. Brusetti
Author: P.W.J.J. van der Wielen
Author: H. Bolhuis
Author: M.M. Yakimov
Author: G. D'Auria
Author: D. Marty
Author: L. Giuliano
Author: C. Tamburini
Author: T.J. McGenity
Author: J.E. Hallsworth
Author: A.M. Sass
Author: K. Timmis
Author: A. Tselepides
Author: G.J. de Lange
Author: A. Hubner
Author: J. Thomson
Author: S.P. Varnavas
Author: F. Gasperoni
Author: H.W. Gerber
Author: E. Malinverno
Author: C. Corselli

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×