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Latitudinal constra...
Latitudinal constraints on the abundance and activity of the cyanobacterium UCYN-A and other marine diazotrophs in the North Pacific
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- Gradoville, Mary R. (författare)
- Univ Calif Santa Cruz, USA
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- Farnelid, Hanna, 1983- (författare)
- Linnéuniversitetet,Institutionen för biologi och miljö (BOM),Vatten,Univ Calif Santa Cruz, USA,Ctr Ecol & Evolut Microbial Model Syst EEMiS
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- White, Angelicque E. (författare)
- Univ Hawaii Manoa, USA
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- Turk-Kubo, Kendra A. (författare)
- Univ Calif Santa Cruz, USA
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- Stewart, Brittany (författare)
- Univ Calif Santa Cruz, USA;Univ Southern Calif, USA
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- Ribalet, Francois (författare)
- Univ Washington, USA
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- Ferron, Sara (författare)
- Univ Hawaii Manoa, USA
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- Pinedo-Gonzalez, Paulina (författare)
- Univ Southern Calif, USA;Columbia Univ, USA
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- Armbrust, E. Virginia (författare)
- Univ Washington, USA
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- Karl, David M. (författare)
- Univ Hawaii Manoa, USA
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- John, Seth (författare)
- Univ Southern Calif, USA
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- Zehr, Jonathan P. (författare)
- Univ Calif Santa Cruz, USA
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(creator_code:org_t)
- 2020-03-05
- 2020
- Engelska.
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Ingår i: Limnology and Oceanography. - : John Wiley & Sons. - 0024-3590 .- 1939-5590. ; 65:8, s. 1858-1875
- Relaterad länk:
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https://doi.org/10.1...
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https://onlinelibrar...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The number of marine environments known to harbor dinitrogen (N-2)-fixing (diazotrophic) microorganisms is increasing, prompting a reassessment of the biogeography of marine diazotrophs and N(2)fixation rates (NFRs). Here, we investigate the diversity, abundance, and activity of diazotrophic microorganisms in the North Pacific Subtropical Gyre (NPSG), a diazotrophic habitat, and the North Pacific Transition Zone (NPTZ), a region characterized by strong physical, chemical, and biological gradients. Samples were collected on two springtime meridional cruises during 2016 and 2017, spanning from 23.5 degrees N to 41.4 degrees N along 158 degrees W. We observed an abrupt decrease in diazotrophic abundances near the southern edge of the NPTZ, which coincided with a salinity front and with a similar to 10-fold increase inSynechococcusabundance, but without a concomitant change in phosphate or nitrate concentrations. In NPSG waters south of this diazotrophic boundary,nifHgenes and NFRs were consistently detected and diazotrophic communities were dominated by UCYN-A, an uncultivated, symbiotic cyanobacterium (2.8 x 10(3)to 1.0 x 10(6)nifHgene copies L-1). There was a significant positive relationship between quantitative polymerase chain reaction-derived UCYN-AnifHgene abundances and community NFRs in the NPSG, suggesting a large contribution of UCYN-A to community NFRs. In the NPTZ waters to the north, NFRs were low or undetected andnifHgenes were rare, with the few detected sequences represented by UCYN-A and noncyanobacterial diazotrophs. The patterns we observed in UCYN-A abundance in the context of local biogeochemistry suggest that the environmental controls of this organism may differ from those of cultivated marine cyanobacterial diazotrophs.
Ämnesord
- NATURVETENSKAP -- Biologi -- Mikrobiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Microbiology (hsv//eng)
Nyckelord
- Mikrobiologi
- Microbiology
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Gradoville, Mary ...
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Farnelid, Hanna, ...
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White, Angelicqu ...
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Turk-Kubo, Kendr ...
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Stewart, Brittan ...
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Ribalet, Francoi ...
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visa fler...
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Ferron, Sara
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Pinedo-Gonzalez, ...
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Armbrust, E. Vir ...
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Karl, David M.
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John, Seth
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Zehr, Jonathan P ...
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visa färre...
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- NATURVETENSKAP
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och Biologi
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och Mikrobiologi
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Limnology and Oc ...
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Linnéuniversitetet