scholarly journals Benthic Nitrogen Loss in the Arabian Sea Off Pakistan

2012 ◽  
Vol 3 ◽  
Author(s):  
Sarah Sokoll ◽  
Moritz Holtappels ◽  
Phyllis Lam ◽  
Gavin Collins ◽  
Michael Schlüter ◽  
...  
Keyword(s):  
Arabian Sea ◽  
Nitrogen Loss

Denitrification as the dominant nitrogen loss process in the Arabian Sea

Nature ◽  
2009 ◽  
Vol 461 (7260) ◽  
pp. 78-81 ◽  
Author(s):  
B. B. Ward ◽  
A. H. Devol ◽  
J. J. Rich ◽  
B. X. Chang ◽  
S. E. Bulow ◽  
...  
Keyword(s):  
Arabian Sea ◽  
Nitrogen Loss ◽  
Loss Process

Denitrification exceeds anammox as a nitrogen loss pathway in the Arabian Sea oxygen minimum zone

2010 ◽  
Vol 57 (3) ◽  
pp. 384-393 ◽  
Author(s):  
Silvia E. Bulow ◽  
Jeremy J. Rich ◽  
Hema S. Naik ◽  
Anil K. Pratihary ◽  
Bess B. Ward
Keyword(s):  
Arabian Sea ◽  
Nitrogen Loss ◽  
Oxygen Minimum Zone ◽  
Minimum Zone ◽  
Oxygen Minimum

scholarly journals Metagenomic analysis of nitrogen and methane cycling in the Arabian Sea oxygen minimum zone

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e1924 ◽  
Author(s):  
Claudia Lüke ◽  
Daan R. Speth ◽  
Martine A.R. Kox ◽  
Laura Villanueva ◽  
Mike S.M. Jetten
Keyword(s):  
Nitrogen Cycle ◽  
Arabian Sea ◽  
Nitrogen Loss ◽  
Global Ocean ◽  
Ammonium Oxidation ◽  
Active Nitrogen ◽  
Core Zone ◽  
Methane Cycling ◽  
Oxygen Minimum ◽  
Oxygen Concentrations

Oxygen minimum zones (OMZ) are areas in the global ocean where oxygen concentrations drop to below one percent. Low oxygen concentrations allow alternative respiration with nitrate and nitrite as electron acceptor to become prevalent in these areas, making them main contributors to oceanic nitrogen loss. The contribution of anammox and denitrification to nitrogen loss seems to vary in different OMZs. In the Arabian Sea, both processes were reported. Here, we performed a metagenomics study of the upper and core zone of the Arabian Sea OMZ, to provide a comprehensive overview of the genetic potential for nitrogen and methane cycling. We propose that aerobic ammonium oxidation is carried out by a diverse community ofThaumarchaeotain the upper zone of the OMZ, whereas a low diversity ofScalindua-like anammox bacteria contribute significantly to nitrogen loss in the core zone. Aerobic nitrite oxidation in the OMZ seems to be performed byNitrospina spp. and a novel lineage of nitrite oxidizing organisms that is present in roughly equal abundance asNitrospina. Dissimilatory nitrate reduction to ammonia (DNRA) can be carried out by yet unknown microorganisms harbouring a divergentnrfAgene. The metagenomes do not provide conclusive evidence for active methane cycling; however, a low abundance of novel alkane monooxygenase diversity was detected. Taken together, our approach confirmed the genomic potential for an active nitrogen cycle in the Arabian Sea and allowed detection of hitherto overlooked lineages of carbon and nitrogen cycle bacteria.

scholarly journals The presence of ladderane lipids in the oxygen minimum zone of the Arabian Sea indicates nitrogen loss through anammox

2007 ◽  
Vol 52 (2) ◽  
pp. 780-786 ◽  
Author(s):  
Andrea Jaeschke ◽  
Ellen C. Hopmans ◽  
Stuart G. Wakeham ◽  
Stefan Schouten ◽  
Jaap S. Sinninghe Damsté
Keyword(s):  
Arabian Sea ◽  
Nitrogen Loss ◽  
Oxygen Minimum Zone ◽  
Minimum Zone ◽  
Ladderane Lipids ◽  
Oxygen Minimum

The effect of organic carbon on fixed nitrogen loss in the eastern tropical South Pacific and Arabian Sea oxygen deficient zones

2014 ◽  
Vol 59 (4) ◽  
pp. 1267-1274 ◽  
Author(s):  
Bonnie X. Chang ◽  
Jeremy R. Rich ◽  
Amal Jayakumar ◽  
Hema Naik ◽  
Anil K. Pratihary ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Arabian Sea ◽  
Nitrogen Loss ◽  
South Pacific ◽  
Fixed Nitrogen

Protein content of 5 algae from Persian gulf and Arabian sea

Planta Medica ◽  
2010 ◽  
Vol 76 (12) ◽  
Author(s):  
N Ebrahimi ◽  
M Moein ◽  
S Moein
Keyword(s):  
Protein Content ◽  
Persian Gulf ◽  
Arabian Sea

Temporally invariable bacterial community structure in the Arabian Sea oxygen minimum zone

2014 ◽  
Vol 73 (1) ◽  
pp. 51-67 ◽  
Author(s):  
A Jain ◽  
M Bandekar ◽  
J Gomes ◽  
D Shenoy ◽  
RM Meena ◽  
...  
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Arabian Sea ◽  
Oxygen Minimum Zone ◽  
Minimum Zone ◽  
Oxygen Minimum
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