We assessed the abundance and molecular phylogeny of archaeoplankton in the oxygen minimum zone (OMZ) of the eastern tropical South Pacific, using specific-probe hybridization and phylogenetic analysis of the SSU-rRNA gene. Euryarchaea from Marine Group-II (MG-II) were most abundant in the surface oxic layer, representing 4.0 +/- 2.0% of the total picoplankton, while crenarchaea from Group I.1a (G-I.1a) peaked at the oxyclines, with a relative abundance of 8.1 +/- 4.3% (upper oxycline). In most of the stations, the abundance of both the groups decreased at the core of the OMZ, where a secondary maximum in cell density is commonly observed. The majority of the phylotypes affiliated with one of three groups: MG-II, euryarchaeal Marine Group-III (MG-III) and G-I.1a (75.9%, 12.8% and 10.3%, respectively). While MG-II phylotypes were found throughout the water column and G-I.1a ones were predominantly found within the oxyclines, MG-III phylotypes came almost exclusively from the OMZ core. Higher archaeal richness was found within the OMZ, with some of the exclusive lineages grouping with sequences from the deep ocean and hydrothermal vents. Moreover, G-I.1a sequences from the OMZ grouped into a different subcluster from the aerobic ammonium-oxidizer Nitrosopumilus maritimus. Thus, the community structure of archaeoplankton in OMZs is rich and distinct, with G-I.1a members particularly prominent at the oxyclines.
机构:
Univ So Denmark, Inst Biol, DK-5230 Odense M, Denmark
Univ So Denmark, Nord Ctr Earth Evolut, DK-5230 Odense M, DenmarkUniv So Denmark, Inst Biol, DK-5230 Odense M, Denmark
Canfield, Don E.
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Stewart, Frank J.
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MIT, Dept Biol Engn, Cambridge, MA 02138 USA
MIT, Dept Civil & Environm Engn, Cambridge, MA 02138 USAUniv So Denmark, Inst Biol, DK-5230 Odense M, Denmark
Stewart, Frank J.
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Thamdrup, Bo
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De Brabandere, Loreto
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h-index: 0
机构:
Univ So Denmark, Inst Biol, DK-5230 Odense M, Denmark
Univ So Denmark, Nord Ctr Earth Evolut, DK-5230 Odense M, DenmarkUniv So Denmark, Inst Biol, DK-5230 Odense M, Denmark
De Brabandere, Loreto
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Dalsgaard, Tage
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h-index: 0
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Aarhus Univ, Natl Environm Res Inst, DK-8600 Silkeborg, DenmarkUniv So Denmark, Inst Biol, DK-5230 Odense M, Denmark
Dalsgaard, Tage
;
Delong, Edward F.
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MIT, Dept Biol Engn, Cambridge, MA 02138 USA
MIT, Dept Civil & Environm Engn, Cambridge, MA 02138 USAUniv So Denmark, Inst Biol, DK-5230 Odense M, Denmark
Delong, Edward F.
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Revsbech, Niels Peter
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Aarhus Univ, Dept Biol Sci, Microbiol Sect, DK-8000 Aarhus C, DenmarkUniv So Denmark, Inst Biol, DK-5230 Odense M, Denmark
Revsbech, Niels Peter
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Ulloa, Osvaldo
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机构:
Univ Concepcion, Dept Oceanog, Concepcion, Chile
Univ Concepcion, Ctr Invest Oceanog Pacifico Sur Oriental, Concepcion, ChileUniv So Denmark, Inst Biol, DK-5230 Odense M, Denmark
机构:
Univ So Denmark, Inst Biol, DK-5230 Odense M, Denmark
Univ So Denmark, Nord Ctr Earth Evolut, DK-5230 Odense M, DenmarkUniv So Denmark, Inst Biol, DK-5230 Odense M, Denmark
Canfield, Don E.
;
Stewart, Frank J.
论文数: 0引用数: 0
h-index: 0
机构:
MIT, Dept Biol Engn, Cambridge, MA 02138 USA
MIT, Dept Civil & Environm Engn, Cambridge, MA 02138 USAUniv So Denmark, Inst Biol, DK-5230 Odense M, Denmark
Stewart, Frank J.
;
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h-index:
机构:
Thamdrup, Bo
;
De Brabandere, Loreto
论文数: 0引用数: 0
h-index: 0
机构:
Univ So Denmark, Inst Biol, DK-5230 Odense M, Denmark
Univ So Denmark, Nord Ctr Earth Evolut, DK-5230 Odense M, DenmarkUniv So Denmark, Inst Biol, DK-5230 Odense M, Denmark
De Brabandere, Loreto
;
Dalsgaard, Tage
论文数: 0引用数: 0
h-index: 0
机构:
Aarhus Univ, Natl Environm Res Inst, DK-8600 Silkeborg, DenmarkUniv So Denmark, Inst Biol, DK-5230 Odense M, Denmark
Dalsgaard, Tage
;
Delong, Edward F.
论文数: 0引用数: 0
h-index: 0
机构:
MIT, Dept Biol Engn, Cambridge, MA 02138 USA
MIT, Dept Civil & Environm Engn, Cambridge, MA 02138 USAUniv So Denmark, Inst Biol, DK-5230 Odense M, Denmark
Delong, Edward F.
;
Revsbech, Niels Peter
论文数: 0引用数: 0
h-index: 0
机构:
Aarhus Univ, Dept Biol Sci, Microbiol Sect, DK-8000 Aarhus C, DenmarkUniv So Denmark, Inst Biol, DK-5230 Odense M, Denmark
Revsbech, Niels Peter
;
Ulloa, Osvaldo
论文数: 0引用数: 0
h-index: 0
机构:
Univ Concepcion, Dept Oceanog, Concepcion, Chile
Univ Concepcion, Ctr Invest Oceanog Pacifico Sur Oriental, Concepcion, ChileUniv So Denmark, Inst Biol, DK-5230 Odense M, Denmark