scholarly journals Nitrite oxidation in the upper water column and oxygen minimum zone of the eastern tropical North Pacific Ocean

2013 ◽  
Vol 7 (11) ◽  
pp. 2192-2205 ◽  
Author(s):  
J Michael Beman ◽  
Joy Leilei Shih ◽  
Brian N Popp
Keyword(s):  
Pacific Ocean ◽  
Water Column ◽  
North Pacific ◽  
North Pacific Ocean ◽  
Oxygen Minimum Zone ◽  
Nitrite Oxidation ◽  
Minimum Zone ◽  
Oxygen Minimum

Distribution of glycerol ether lipids in the oxygen minimum zone of the Eastern Tropical North Pacific Ocean

2014 ◽  
Vol 71 ◽  
pp. 60-71 ◽  
Author(s):  
Sitan Xie ◽  
Xiao-Lei Liu ◽  
Florence Schubotz ◽  
Stuart G. Wakeham ◽  
Kai-Uwe Hinrichs
Keyword(s):  
Pacific Ocean ◽  
North Pacific ◽  
North Pacific Ocean ◽  
Oxygen Minimum Zone ◽  
Ether Lipids ◽  
Glycerol Ether ◽  
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.

scholarly journals Biological nitrogen fixation in the oxygen-minimum region of the eastern tropical North Pacific ocean

2017 ◽  
Vol 11 (10) ◽  
pp. 2356-2367 ◽  
Author(s):  
Amal Jayakumar ◽  
Bonnie X Chang ◽  
Brittany Widner ◽  
Peter Bernhardt ◽  
Margaret R Mulholland ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Pacific Ocean ◽  
North Pacific ◽  
Biological Nitrogen Fixation ◽  
North Pacific Ocean ◽  
Biological Nitrogen ◽  
Oxygen Minimum

scholarly journals Decadal to centennial fluctuations in the intensity of the eastern tropical North Pacific oxygen minimum zone during the last 1200 years

2016 ◽  
Vol 31 (8) ◽  
pp. 1138-1151 ◽  
Author(s):  
Caitlin E. Tems ◽  
William M. Berelson ◽  
Robert Thunell ◽  
Eric Tappa ◽  
Xiaomei Xu ◽  
...  
Keyword(s):  
North Pacific ◽  
Oxygen Minimum Zone ◽  
Minimum Zone ◽  
Oxygen Minimum

Spatial variability of Fe(III) hydroxide solubility in the water column of the northern North Pacific Ocean

1998 ◽  
Vol 45 (1) ◽  
pp. 91-113 ◽  
Author(s):  
Kenshi Kuma ◽  
Akira Katsumoto ◽  
Hajime Kawakami ◽  
Fumiaki Takatori ◽  
Katsuhiko Matsunaga
Keyword(s):  
Pacific Ocean ◽  
Spatial Variability ◽  
Water Column ◽  
North Pacific ◽  
North Pacific Ocean
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