Oceanographic boundaries constrain microbial diversity gradients in the south pacific ocean

Raes, EJ; Bodrossy, L; Van De Kamp, J; Bissett, A; Ostrowski, M; Brown, MV; Sow, SLS; Sloyan, B; Waite, AM

Oceanographic boundaries constrain microbial diversity gradients in the south pacific ocean

Raes, EJ Bodrossy, L Van De Kamp, J Bissett, A Ostrowski, M

Brown, MV Sow, SLS Sloyan, B Waite, AM

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Publication Type:: Journal Article
Citation:: Proceedings of the National Academy of Sciences of the United States of America, 2018, 115 (35), pp. E8266 - E8275
Issue Date:: 2018-08-28

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Field	Value	Language
dc.contributor.author	Raes, EJ	en_US
dc.contributor.author	Bodrossy, L	en_US
dc.contributor.author	Van De Kamp, J	en_US
dc.contributor.author	Bissett, A	en_US
dc.contributor.author	Ostrowski, M https://orcid.org/0000-0002-4357-3023	en_US
dc.contributor.author	Brown, MV	en_US
dc.contributor.author	Sow, SLS	en_US
dc.contributor.author	Sloyan, B	en_US
dc.contributor.author	Waite, AM	en_US
dc.date.issued	2018-08-28	en_US
dc.identifier.citation	Proceedings of the National Academy of Sciences of the United States of America, 2018, 115 (35), pp. E8266 - E8275	en_US
dc.identifier.issn	0027-8424	en_US
dc.identifier.uri	http://hdl.handle.net/10453/131025
dc.description.abstract	© National Academy of Sciences. All rights reserved. Marine microbes along with microeukaryotes are key regulators of oceanic biogeochemical pathways. Here we present a high-resolution (every 0.5° of latitude) dataset describing microbial pro- and eukaryotic richness in the surface and just below the thermocline along a 7,000-km transect from 66°S at the Antarctic ice edge to the equator in the South Pacific Ocean. The transect, conducted in austral winter, covered key oceanographic features including crossing of the polar front (PF), the subtropical front (STF), and the equatorial upwelling region. Our data indicate that temperature does not determine patterns of marine microbial richness, complementing the global model data from Ladau et al. [Ladau J, et al. (2013) ISME J 7:1669–1677]. Rather, NH4+, nanophytoplankton, and primary productivity were the main drivers for archaeal and bacterial richness. Eukaryote richness was highest in the least-productive ocean region, the tropical oligotrophic province. We also observed a unique diversity pattern in the South Pacific Ocean: a regional increase in archaeal and bacterial diversity between 10°S and the equator. Rapoport’s rule describes the tendency for the latitudinal ranges of species to increase with latitude. Our data showed that the mean latitudinal ranges of archaea and bacteria decreased with latitude. We show that permanent oceanographic features, such as the STF and the equatorial upwelling, can have a significant influence on both alpha-diversity and beta-diversity of pro- and eukaryotes.	en_US
dc.relation.ispartof	Proceedings of the National Academy of Sciences of the United States of America	en_US
dc.relation.isbasedon	10.1073/pnas.1719335115	en_US
dc.subject.mesh	Phytoplankton	en_US
dc.subject.mesh	Bacteria	en_US
dc.subject.mesh	Archaea	en_US
dc.subject.mesh	Water Microbiology	en_US
dc.subject.mesh	Biodiversity	en_US
dc.subject.mesh	Antarctic Regions	en_US
dc.subject.mesh	Pacific Ocean	en_US
dc.subject.mesh	Bacterial Physiological Phenomena	en_US
dc.title	Oceanographic boundaries constrain microbial diversity gradients in the south pacific ocean	en_US
dc.type	Journal Article
utslib.citation.volume	35	en_US
utslib.citation.volume	115	en_US
utslib.for	0601 Biochemistry and Cell Biology	en_US
utslib.for	0405 Oceanography	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Strength - C3 - Climate Change Cluster
utslib.copyright.status	closed_access
pubs.issue	35	en_US
pubs.publication-status	Published	en_US
pubs.volume	115	en_US

Abstract:

© National Academy of Sciences. All rights reserved. Marine microbes along with microeukaryotes are key regulators of oceanic biogeochemical pathways. Here we present a high-resolution (every 0.5° of latitude) dataset describing microbial pro- and eukaryotic richness in the surface and just below the thermocline along a 7,000-km transect from 66°S at the Antarctic ice edge to the equator in the South Pacific Ocean. The transect, conducted in austral winter, covered key oceanographic features including crossing of the polar front (PF), the subtropical front (STF), and the equatorial upwelling region. Our data indicate that temperature does not determine patterns of marine microbial richness, complementing the global model data from Ladau et al. [Ladau J, et al. (2013) ISME J 7:1669–1677]. Rather, NH4+, nanophytoplankton, and primary productivity were the main drivers for archaeal and bacterial richness. Eukaryote richness was highest in the least-productive ocean region, the tropical oligotrophic province. We also observed a unique diversity pattern in the South Pacific Ocean: a regional increase in archaeal and bacterial diversity between 10°S and the equator. Rapoport’s rule describes the tendency for the latitudinal ranges of species to increase with latitude. Our data showed that the mean latitudinal ranges of archaea and bacteria decreased with latitude. We show that permanent oceanographic features, such as the STF and the equatorial upwelling, can have a significant influence on both alpha-diversity and beta-diversity of pro- and eukaryotes.

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http://hdl.handle.net/10453/131025