scholarly journals Sediment anoxia limits microbial-driven seagrass carbon remineralization under warming conditions

2017 ◽  
Vol 93 (6) ◽  
Author(s):  
Stacey M. Trevathan-Tackett ◽  
Justin R. Seymour ◽  
Daniel A. Nielsen ◽  
Peter I. Macreadie ◽  
Thomas C. Jeffries ◽  
...  
Keyword(s):  
Carbon Remineralization ◽  
Sediment Anoxia

scholarly journals Early season mesopelagic carbon remineralization and transfer efficiency in the naturally iron-fertilized Kerguelen area

2014 ◽  
Vol 11 (6) ◽  
pp. 9035-9069 ◽  
Author(s):  
S. H. M. Jacquet ◽  
F. Dehairs ◽  
A. J. Cavagna ◽  
F. Planchon ◽  
L. Monin ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Polar Front ◽  
Carbon Export ◽  
Major Barrier ◽  
Early Season ◽  
Sea Floor ◽  
Carbon Transfer ◽  
Carbon Remineralization ◽  
Bottom Waters ◽  
Transfer Potential

Abstract. We report on the zonal variability of mesopelagic particulate organic carbon) remineralization and deep carbon transfer potential during the Kerguelen Ocean and Plateau compared Study 2 expedition (KEOPS 2; October–November 2011) in an area of the Polar Front supporting recurrent massive blooms from natural Fe fertilization. Mesopelagic carbon remineralization was assessed using the excess, non-lithogenic particulate barium (Baxs) inventories in mesopelagic waters and compared with surface primary and export productions. Results for this early season study are compared with results obtained earlier (2005; KEOPS 1) for the same area during summer. For the Kerguelen plateau (A3 site) we observe a similar functioning of the mesopelagic ecosystem during both seasons (spring and summer), with less that 30% of carbon exported from the upper 150 m being remineralized in the mesopelagic column (150–400 m). For deeper stations (> 2000 m) located on the margin, inside a Polar Front meander, as well as in the vicinity of the Polar Front, east of Kerguelen, remineralization in the upper 400 m in general represents > 30% of carbon export, but when considering the upper 800 m, in some cases, the entire flux of exported carbon is remineralized. It appears that above the plateau (A3 site) mesopelagic remineralization is not a major barrier to the transfer of organic matter to the sea-floor (close to 500 m). There the efficiency of carbon sequestration into the bottom waters (> 400 m) reached up to 87% of the carbon exported from the upper 150 m. In contrast, at the deeper locations mesopelagic remineralization clearly limits the sequestration of carbon to depths > 400 m. For sites at the margin of the plateau (station E-4W) and the Polar front (station F-L), mesopelagic remineralization even exceeds upper 150 m export, resulting in a null sequestration efficiency to depths > 800 m. In the Polar Front meander, where successive stations form a time series, the capacity of the meander to transfer carbon to depth > 800 m is highly variable (0 to 73 %). The highest carbon transfer efficiencies in the meander are furthermore coupled to intense and complete deep (> 800 m) remineralization, resulting again in a close to zero deep (> 2000 m) carbon sequestration efficiency there.

scholarly journals Internal phosphorus loading due to sediment anoxia in shallow areas: implications for lake aeration treatments

2020 ◽  
Vol 82 (3) ◽  
Author(s):  
Olga Tammeorg ◽  
Gertrud Nürnberg ◽  
Juha Niemistö ◽  
Marina Haldna ◽  
Jukka Horppila
Keyword(s):  
Phosphorus Loading ◽  
Internal Phosphorus Loading ◽  
Sediment Anoxia

The ability of aquatic macrophytes to increase root porosity and radial oxygen loss determines their resistance to sediment anoxia

2012 ◽  
Vol 46 (2) ◽  
pp. 191-200 ◽  
Author(s):  
Damien G. Lemoine ◽  
Florian Mermillod-Blondin ◽  
Marie-Hélène Barrat-Segretain ◽  
Corinne Massé ◽  
Emmanuel Malet
Keyword(s):  
Aquatic Macrophytes ◽  
Radial Oxygen Loss ◽  
Root Porosity ◽  
Oxygen Loss ◽  
Sediment Anoxia

scholarly journals Correction to: Genomic and metatranscriptomic analyses of carbon remineralization in an Antarctic polynya

Microbiome ◽  
2019 ◽  
Vol 7 (1) ◽  
Author(s):  
So-Jeong Kim ◽  
Jong-Geol Kim ◽  
Sang-Hoon Lee ◽  
Soo-Je Park ◽  
Joo-Han Gwak ◽  
...  
Keyword(s):  
Carbon Remineralization

scholarly journals Mesopelagic carbon remineralization during the European Iron Fertilization Experiment

2008 ◽  
Vol 22 (1) ◽  
pp. n/a-n/a ◽  
Author(s):  
S. H. M. Jacquet ◽  
N. Savoye ◽  
F. Dehairs ◽  
V. H. Strass ◽  
D. Cardinal
Keyword(s):  
Fertilization Experiment ◽  
Iron Fertilization ◽  
Carbon Remineralization

Twilight zone organic carbon remineralization in the Polar Front Zone and Subantarctic Zone south of Tasmania

2011 ◽  
Vol 58 (21-22) ◽  
pp. 2222-2234 ◽  
Author(s):  
S.H.M. Jacquet ◽  
F. Dehairs ◽  
I. Dumont ◽  
S. Becquevort ◽  
A.-J. Cavagna ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Polar Front ◽  
Twilight Zone ◽  
Carbon Remineralization ◽  
Front Zone

Oxygen Utilization and Organic Carbon Remineralization in the Upper Water Column of the Pacific Ocean

2004 ◽  
Vol 60 (1) ◽  
pp. 45-52 ◽  
Author(s):  
Richard A. Feely ◽  
Christopher L. Sabine ◽  
Reiner Schlitzer ◽  
John L. Bullister ◽  
Sabine Mecking ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Organic Carbon ◽  
Water Column ◽  
Oxygen Utilization ◽  
The Pacific ◽  
Carbon Remineralization ◽  
The Pacific Ocean
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