Dissolved Organic Matter and Heterotrophic Microneuston in the Surface Microlayers of the North Atlantic

Science ◽  
1976 ◽  
Vol 194 (4272) ◽  
pp. 1415-1418 ◽  
Author(s):  
J. MCN. SIEBURTH ◽  
P.-J. WILLIS ◽  
K. M. JOHNSON ◽  
C. M. BURNEY ◽  
D. M. LAVOIE ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
North Atlantic ◽  
The North ◽  
The North Atlantic

Meridional variability in dissolved organic matter stocks and diagenetic state within the euphotic and mesopelagic zone of the North Atlantic subtropical gyre

2010 ◽  
Vol 119 (1-4) ◽  
pp. 9-21 ◽  
Author(s):  
Stuart J. Goldberg ◽  
Craig A. Carlson ◽  
Brandon Bock ◽  
Norm B. Nelson ◽  
David A. Siegel
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
North Atlantic ◽  
Subtropical Gyre ◽  
The North ◽  
Mesopelagic Zone ◽  
The North Atlantic

Hydrography of chromophoric dissolved organic matter in the North Atlantic

2007 ◽  
Vol 54 (5) ◽  
pp. 710-731 ◽  
Author(s):  
Norman B. Nelson ◽  
David A. Siegel ◽  
Craig. A. Carlson ◽  
Chantal Swan ◽  
William M. Smethie ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
North Atlantic ◽  
Chromophoric Dissolved Organic Matter ◽  
The North ◽  
The North Atlantic

Meridional fluxes of dissolved organic matter in the north Atlantic Ocean

1992 ◽  
Vol 97 (C10) ◽  
pp. 15625 ◽  
Author(s):  
John J. Walsh ◽  
Kendall L. Carder ◽  
Frank E. Müller-Karger
Keyword(s):  
Organic Matter ◽  
Atlantic Ocean ◽  
Dissolved Organic Matter ◽  
North Atlantic ◽  
North Atlantic Ocean ◽  
The North ◽  
The North Atlantic

scholarly journals Methylphosphonate Oxidation inProchlorococcusStrain MIT9301 Supports Phosphate Acquisition, Formate Excretion, and Carbon Assimilation into Purines

2019 ◽  
Vol 85 (13) ◽  
Author(s):  
Oscar A. Sosa ◽  
John R. Casey ◽  
David M. Karl
Keyword(s):  
Organic Matter ◽  
Atlantic Ocean ◽  
Dissolved Organic Matter ◽  
North Atlantic ◽  
North Atlantic Ocean ◽  
Carbon Assimilation ◽  
Unicellular Cyanobacterium ◽  
Content Type ◽  
The North ◽  
Oxidative Pathway

ABSTRACTThe marine unicellular cyanobacteriumProchlorococcusis an abundant primary producer and widespread inhabitant of the photic layer in tropical and subtropical marine ecosystems, where the inorganic nutrients required for growth are limiting. In this study, we demonstrate thatProchlorococcushigh-light strain MIT9301, an isolate from the phosphate-depleted subtropical North Atlantic Ocean, can oxidize methylphosphonate (MPn) and hydroxymethylphosphonate (HMPn), two phosphonate compounds present in marine dissolved organic matter, to obtain phosphorus. The oxidation of these phosphonates releases the methyl group as formate, which is both excreted and assimilated into purines in RNA and DNA. Genes encoding the predicted phosphonate oxidative pathway of MIT9301 were predominantly present inProchlorococcusgenomes from parts of the North Atlantic Ocean where phosphate availability is typically low, suggesting that phosphonate oxidation is an ecosystem-specific adaptation of someProchlorococcuspopulations to cope with phosphate scarcity.IMPORTANCEUntil recently, MPn was only known to be degraded in the environment by the bacterial carbon-phosphorus (CP) lyase pathway, a reaction that releases the greenhouse gas methane. The identification of a formate-yielding MPn oxidative pathway in the marine planctomyceteGimesia maris(S. R. Gama, M. Vogt, T. Kalina, K. Hupp, et al., ACS Chem Biol 14:735–741, 2019,https://doi.org/10.1021/acschembio.9b00024) and the presence of this pathway inProchlorococcusindicate that this compound can follow an alternative fate in the environment while providing a valuable source of P to organisms. In the ocean, where MPn is a major component of dissolved organic matter, the oxidation of MPn to formate byProchlorococcusmay direct the flow of this one-carbon compound to carbon dioxide or assimilation into biomass, thus limiting the production of methane.

Metabolic poise in the North Atlantic Ocean diagnosed from organic matter transports

2004 ◽  
Vol 49 (4) ◽  
pp. 1084-1094 ◽  
Author(s):  
Dennis A. Hansell ◽  
Hugh W. Ducklow ◽  
Alison M. Macdonald ◽  
Molly O-Neil Baringer
Keyword(s):  
Organic Matter ◽  
Atlantic Ocean ◽  
North Atlantic ◽  
North Atlantic Ocean ◽  
The North ◽  
The North Atlantic
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