scholarly journals Benthic Respiration in Hypoxic Waters Enhances Bottom Water Acidification in the Northern Gulf of Mexico

2020 ◽  
Vol 125 (10) ◽  
Author(s):  
Hongjie Wang ◽  
John Lehrter ◽  
Kanchan Maiti ◽  
Katja Fennel ◽  
Arnaud Laurent ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Bottom Water ◽  
Water Acidification ◽  
Northern Gulf Of Mexico ◽  
Benthic Respiration

Denitrification Dominates Sediment Nitrogen Removal and Is Enhanced by Bottom-Water Hypoxia in the Northern Gulf of Mexico

2015 ◽  
Vol 38 (6) ◽  
pp. 2279-2294 ◽  
Author(s):  
Mark J. McCarthy ◽  
Silvia E. Newell ◽  
Stephen A. Carini ◽  
Wayne S. Gardner
Keyword(s):  
Gulf Of Mexico ◽  
Nitrogen Removal ◽  
Bottom Water ◽  
Northern Gulf Of Mexico

scholarly journals Interannual variation in summer N<sub>2</sub>O concentration in the hypoxic region of the northern Gulf of Mexico, 1985–2007

2013 ◽  
Vol 10 (11) ◽  
pp. 6783-6792 ◽  
Author(s):  
I.-N. Kim ◽  
K. Lee ◽  
H. W. Bange ◽  
A. M. Macdonald
Keyword(s):  
Nitrous Oxide ◽  
Gulf Of Mexico ◽  
Interannual Variation ◽  
Bottom Water ◽  
Areal Extent ◽  
Low Oxygen ◽  
N2o Production ◽  
Northern Gulf Of Mexico ◽  
The Mean ◽  
Stressed Region

Abstract. Microbial nitrous oxide (N2O) production in the ocean is enhanced under low-oxygen (O2) conditions. This is especially important in the context of increasing hypoxia (i.e., oceanic zones with extremely reduced O2 concentrations). Here, we present a study on the interannual variation in summertime nitrous oxide (N2O) concentrations in the bottom waters of the northern Gulf of Mexico (nGOM), which is well-known as the site of the second largest seasonally occurring hypoxic zone worldwide. To this end we developed a simple model that computes bottom-water N2O concentrations with a tri-linear ΔN2O/O2 relationship based on water-column O2 concentrations, derived from summer (July) Texas–Louisiana shelf-wide hydrographic data between 1985 and 2007. ΔN2O (i.e., excess N2O) was computed including nitrification and denitrification as the major microbial production and consumption pathways of N2O. The mean modeled bottom-water N2O concentration for July in the nGOM was 14.5 ± 2.3 nmol L−1 (min: 11.0 ± 4.5 nmol L−1 in 2000 and max: 20.6 ± 11.3 nmol L−1 in 2002). The mean bottom-water N2O concentrations were significantly correlated with the areal extent of hypoxia in the nGOM. Our modeling analysis indicates that the nGOM is a persistent summer source of N2O, and nitrification is dominating N2O production in this region. Based on the ongoing increase in the areal extent of hypoxia in the nGOM, we conclude that N2O production (and its subsequent emissions) from this environmentally stressed region will probably continue to increase into the future.

scholarly journals Trends in summer bottom-water temperatures on the northern Gulf of Mexico continental shelf from 1985 to 2015

PLoS ONE ◽  
2017 ◽  
Vol 12 (9) ◽  
pp. e0184350 ◽  
Author(s):  
R. Eugene Turner ◽  
Nancy N. Rabalais ◽  
Dubravko Justić
Keyword(s):  
Gulf Of Mexico ◽  
Continental Shelf ◽  
Bottom Water ◽  
Northern Gulf Of Mexico

Benthic fluxes from hypoxia-influenced Gulf of Mexico sediments: Impact on bottom water acidification

2019 ◽  
Vol 209 ◽  
pp. 94-106 ◽  
Author(s):  
William M. Berelson ◽  
James McManus ◽  
Silke Severmann ◽  
Nick Rollins
Keyword(s):  
Gulf Of Mexico ◽  
Bottom Water ◽  
Benthic Fluxes ◽  
Water Acidification

Microbial food web contributions to bottom water hypoxia in the northern Gulf of Mexico

2008 ◽  
Vol 28 (9) ◽  
pp. 1127-1137 ◽  
Author(s):  
Michael Dagg ◽  
Riki Sato ◽  
Hongbin Liu ◽  
Thomas S. Bianchi ◽  
Rebecca Green ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Food Web ◽  
Bottom Water ◽  
Microbial Food Web ◽  
Northern Gulf Of Mexico

Effects of hypoxia on habitat quality of pelagic planktivorous fishes in the northern Gulf of Mexico

2014 ◽  
Vol 505 ◽  
pp. 209-226 ◽  
Author(s):  
H Zhang ◽  
DM Mason ◽  
CA Stow ◽  
AT Adamack ◽  
SB Brandt ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Habitat Quality ◽  
Northern Gulf Of Mexico
Sign in / Sign up

Export Citation Format

Share Document