scholarly journals An evaluation of physical and biogeochemical processes regulating the oxygen minimum zone in the water column of the Bay of Bengal

2002 ◽  
Vol 16 (4) ◽  
pp. 46-1-46-10 ◽  
Author(s):  
V. V. S. S. Sarma
Keyword(s):  
Water Column ◽  
Bay Of Bengal ◽  
Oxygen Minimum Zone ◽  
Biogeochemical Processes ◽  
Minimum Zone ◽  
Oxygen Minimum

Intensified oxygen minimum zone on the western shelf of Bay of Bengal during summer monsoon: influence of river discharge

2012 ◽  
Vol 69 (1) ◽  
pp. 45-55 ◽  
Author(s):  
V. V. S. S. Sarma ◽  
M. S. Krishna ◽  
R. Viswanadham ◽  
G. D. Rao ◽  
V. D. Rao ◽  
...  
Keyword(s):  
Summer Monsoon ◽  
Bay Of Bengal ◽  
River Discharge ◽  
Oxygen Minimum Zone ◽  
Minimum Zone ◽  
Oxygen Minimum

scholarly journals Sensitivity of the simulated Oxygen Minimum Zone to biogeochemical processes at an oligotrophic site in the Arabian Sea

2018 ◽  
Vol 372 ◽  
pp. 12-23 ◽  
Author(s):  
S. Sankar ◽  
L. Polimene ◽  
L. Marin ◽  
N.N. Menon ◽  
A. Samuelsen ◽  
...  
Keyword(s):  
Arabian Sea ◽  
Oxygen Minimum Zone ◽  
Biogeochemical Processes ◽  
Minimum Zone ◽  
Oxygen Minimum

scholarly journals N2 production rates limited by nitrite availability in the Bay of Bengal oxygen minimum zone

2016 ◽  
Vol 10 (1) ◽  
pp. 24-29 ◽  
Author(s):  
L. A. Bristow ◽  
C. M. Callbeck ◽  
M. Larsen ◽  
M. A. Altabet ◽  
J. Dekaezemacker ◽  
...  
Keyword(s):  
Bay Of Bengal ◽  
Oxygen Minimum Zone ◽  
Production Rates ◽  
Minimum Zone ◽  
Oxygen Minimum

scholarly journals Differential Distribution and Determinants of Ammonia Oxidizing Archaea Sublineages in the Oxygen Minimum Zone off Costa Rica

2019 ◽  
Vol 7 (10) ◽  
pp. 453 ◽  
Author(s):  
Yanhong Lu ◽  
Xiaomin Xia ◽  
Shunyan Cheung ◽  
Hongmei Jing ◽  
Hongbin Liu
Keyword(s):  
Costa Rica ◽  
Water Column ◽  
Gulf Of California ◽  
North Pacific Ocean ◽  
Oxygen Minimum Zone ◽  
Low Oxygen ◽  
Environmental Determinants ◽  
Ammonia Oxidizing Archaea ◽  
Minimum Zone ◽  
Oxygen Minimum

Ammonia oxidizing archaea (AOA) are microbes that are widely distributed in the ocean that convert ammonia to nitrite for energy acquisition in the presence of oxygen. Recent study has unraveled highly diverse sublineages within the previously defined AOA ecotypes (i.e., water column A (WCA) and water column B (WCB)), although the eco-physiology and environmental determinants of WCB subclades remain largely unclear. In this study, we examined the AOA communities along the water columns (40–3000 m depth) in the Costa Rica Dome (CRD) upwelling region in the eastern tropical North Pacific Ocean. Highly diverse AOA communities that were significantly different from those in oxygenated water layers were observed in the core layer of the oxygen minimum zone (OMZ), where the dissolved oxygen (DO) concentration was < 2μM. Moreover, a number of AOA phylotypes were found to be enriched in the OMZ core. Most of them were negatively correlated with DO and were also detected in other OMZs in the Arabian Sea and Gulf of California, which suggests low oxygen adaptation. This study provided the first insight into the differential niche partitioning and environmental determinants of various subclades within the ecotype WCB. Our results indicated that the ecotype WCB did indeed consist of various sublineages with different eco-physiologies, which should be further explored.

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