Biogeography of Southern Ocean prokaryotes: a comparison of the Indian and Pacific sectors.

Autor: Sow SLS; Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, 7000, Australia.; Oceans and Atmosphere, Commonwealth Scientific and Industrial Research Organisation, Hobart, TAS, 7000, Australia., Brown MV; School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW, 2308, Australia., Clarke LJ; Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, 7000, Australia.; Australian Antarctic Division, Channel Highway, Kingston, TAS, 7050, Australia., Bissett A; Oceans and Atmosphere, Commonwealth Scientific and Industrial Research Organisation, Hobart, TAS, 7000, Australia., van de Kamp J; Oceans and Atmosphere, Commonwealth Scientific and Industrial Research Organisation, Hobart, TAS, 7000, Australia., Trull TW; Oceans and Atmosphere, Commonwealth Scientific and Industrial Research Organisation, Hobart, TAS, 7000, Australia.; Antarctic Climate and Ecosystem Cooperative Research Center (ACE-CRC), Hobart, TAS, 7000, Australia., Raes EJ; Oceans and Atmosphere, Commonwealth Scientific and Industrial Research Organisation, Hobart, TAS, 7000, Australia.; Flourishing Oceans, Minderoo Foundation, Broadway, Nedlands, WA, 6009, Australia., Seymour JR; Climate Change Cluster, University of Technology Sydney, Ultimo, NSW, 2007, Australia., Bramucci AR; Climate Change Cluster, University of Technology Sydney, Ultimo, NSW, 2007, Australia., Ostrowski M; Climate Change Cluster, University of Technology Sydney, Ultimo, NSW, 2007, Australia., Boyd PW; Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, 7000, Australia., Deagle BE; Australian Antarctic Division, Channel Highway, Kingston, TAS, 7050, Australia.; National Collections & Marine Infrastructure, Commonwealth Scientific and Industrial Research Organisation, Hobart, TAS, 7000, Australia., Pardo PC; Oceans and Atmosphere, Commonwealth Scientific and Industrial Research Organisation, Hobart, TAS, 7000, Australia.; Antarctic Climate and Ecosystem Cooperative Research Center (ACE-CRC), Hobart, TAS, 7000, Australia.; Departamento de Oceanografía, Instituto de Investigacións Mariñas (IIM-CSIC), Vigo, Pontevedra, 36208, Spain., Sloyan BM; Oceans and Atmosphere, Commonwealth Scientific and Industrial Research Organisation, Hobart, TAS, 7000, Australia., Bodrossy L; Oceans and Atmosphere, Commonwealth Scientific and Industrial Research Organisation, Hobart, TAS, 7000, Australia.
Jazyk: angličtina
Zdroj: Environmental microbiology [Environ Microbiol] 2022 May; Vol. 24 (5), pp. 2449-2466. Date of Electronic Publication: 2022 Feb 16.
DOI: 10.1111/1462-2920.15906
Abstrakt: We investigated the Southern Ocean (SO) prokaryote community structure via zero-radius operational taxonomic unit (zOTU) libraries generated from 16S rRNA gene sequencing of 223 full water column profiles. Samples reveal the prokaryote diversity trend between discrete water masses across multiple depths and latitudes in Indian (71-99°E, summer) and Pacific (170-174°W, autumn-winter) sectors of the SO. At higher taxonomic levels (phylum-family) we observed water masses to harbour distinct communities across both sectors, but observed sectorial variations at lower taxonomic levels (genus-zOTU) and relative abundance shifts for key taxa such as Flavobacteria, SAR324/Marinimicrobia, Nitrosopumilus and Nitrosopelagicus at both epi- and bathy-abyssopelagic water masses. Common surface bacteria were abundant in several deep-water masses and vice-versa suggesting connectivity between surface and deep-water microbial assemblages. Bacteria from same-sector Antarctic Bottom Water samples showed patchy, high beta-diversity which did not correlate well with measured environmental parameters or geographical distance. Unconventional depth distribution patterns were observed for key archaeal groups: Crenarchaeota was found across all depths in the water column and persistent high relative abundances of common epipelagic archaeon Nitrosopelagicus was observed in deep-water masses. Our findings reveal substantial regional variability of SO prokaryote assemblages that we argue should be considered in wide-scale SO ecosystem microbial modelling.
(© 2022 The Authors. Environmental Microbiology published by Society for Applied Microbiology and John Wiley & Sons Ltd.)
Databáze: MEDLINE
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